1  5118 117 POSSIBLE ASSOCIATION BETWEEN GERMLINE METHYLENETETRAHYDROFOLATE REDUCTASE GENE POLYMORPHISMS AND PSORIASIS RISK IN A TURKISH POPULATION. BACKGROUND: PSORIASIS IS A COMMON CHRONIC INFLAMMATORY SKIN DISEASE CAUSED BY GENETIC AND EPIGENETIC FACTORS. THERE ARE CONFLICTING RESULTS IN THE LITERATURE ABOUT THE ASSOCIATION BETWEEN PSORIASIS AND THE METHYLENETETRAHYDROFOLATE REDUCTASE GENE (MTHFR), RANGING FROM STRONG LINKAGE TO NO ASSOCIATION. AIM: TO INVESTIGATE THE ASSOCIATION BETWEEN THE GERMLINE MTHFR POLYMORPHISMS C677T AND A1298C WITH PSORIASIS RISK IN A TURKISH POPULATION. METHODS: THE STUDY ENROLLED 84 PATIENTS WITH PSORIASIS AND 212 HEALTHY CONTROLS (HCS) WITHOUT ANY HISTORY OF PSORIASIS. DNA WAS EXTRACTED FROM PERIPHERAL BLOOD SAMPLES OF PATIENTS AND HCS, AND REAL-TIME PCR WAS USED FOR GENOTYPING. RESULTS WERE COMPARED BY PEARSON CHI(2) TEST AND MULTIPLE LOGISTIC REGRESSION MODELS. RESULTS: THE FREQUENCY OF BOTH THE MTHFR 677TT AND A1298C (HOMOZYGOUS) GENOTYPES WAS STATISTICALLY SIGNIFICANTLY DIFFERENT FROM HCS. POINT MUTATIONS WERE DETECTED IN ALL PATIENTS WITH EARLY-ONSET PSORIASIS (BEFORE THE AGE OF 20 YEARS). THE T ALLELE OF MTHFR 677 AND THE C ALLELE OF MTHFR 1298 INCREASED PSORIASIS RISK BY 12.4- AND 17.0-FOLD, RESPECTIVELY, IN PATIENTS COMPARED WITH HCS. CONCLUSION: A POSSIBLE ASSOCIATION WAS DETECTED BETWEENGERMLINE MTHFR 677 C>T AND 1298 A>C GENOTYPES AND PSORIASIS RISK IN A TURKISH POPULATION. THESE RESULTS NEED TO BE CONFIRMED IN FURTHER STUDIES WITH LARGER SAMPLE SIZES.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
2  6250  41 THE METHYLENETETRAHYDROFOLATE REDUCTASE 677C>T GENE POLYMORPHISM IS NOT ASSOCIATED WITH CHRONIC PLAQUE PSORIASIS. BACKGROUND: METHYLENETETRAHYDROFOLATE REDUCTASE (MTHFR) IS INVOLVED IN THE FORMATION OF METHYL DONORS, WHICH CONTRIBUTE TO DNA METHYLATION. DNA METHYLATION IS AN ESSENTIAL EPIGENETIC FEATURE PLAYING A CRITICAL ROLE IN GENE REGULATION AND CELLULAR DIFFERENTIATION. IN ADDITION, MTHFR ACTIVITY AFFECTS PLASMA HOMOCYSTEINE LEVELS. A FUNCTIONAL POLYMORPHISM IN THE MTHFR GENE (677C>T, RS1801133) LEADING TO REDUCED ENZYME ACTIVITY HAS BEEN ASSOCIATED WITH CHRONIC PLAQUE PSORIASIS IN A CHINESE POPULATION. THIS FINDING, HOWEVER, HAS NOT YET BEEN EITHER CONFIRMED OR REFUTED IN OTHER POPULATIONS. THE PURPOSE OF THE PRESENT STUDY WAS TO INVESTIGATE A HYPOTHESIZED ASSOCIATION BETWEEN THE MTHFR 677C>T POLYMORPHISM AND THE PRESENCE OF CHRONIC PLAQUE PSORIASIS IN A CAUCASIAN POPULATION. METHODS: GENOTYPES FOR THE MTHFR 677C>T POLYMORPHISM WERE DETERMINED IN 310 PATIENTS AND 247 CONTROL SUBJECTS. IN A SUBGROUP OF 33 PATIENTS AND 33 SEX- AND AGE-MATCHED CONTROL SUBJECTS, FASTING PLASMA HOMOCYSTEINE CONCENTRATIONS WERE DETERMINED BY HIGH-PERFORMANCE LIQUID CHROMATOGRAPHY AND IMMUNOLOGICAL ASSAYS WERE USED FOR THE MEASUREMENT OF FOLATE AND VITAMIN B(12). RESULTS: PREVALENCE OF THE HOMOZYGOUS MTHFR 677TT GENOTYPE DID NOT SIGNIFICANTLY DIFFER BETWEEN PATIENTS AND CONTROLS (15.2% VS 11.7%, P = 0.24). MEAN PLASMA HOMOCYSTEINE CONCENTRATIONS WERE SIGNIFICANTLY HIGHER IN PSORIASIS PATIENTS THAN AMONG CONTROL SUBJECTS (13.5 +/- 5.3 MICROMOL/L VS 11.0 +/- 2.2 MICROMOL/L, P = 0.026). NO SIGNIFICANT DIFFERENCES BETWEEN EITHER MEAN PLASMA FOLATE OR VITAMIN B(12) CONCENTRATIONS WERE OBSERVED BETWEEN BOTH GROUPS. CONCLUSION: OUR DATA SUGGEST THAT THE MTHFR 677C>T GENE POLYMORPHISM IS NOT ASSOCIATED WITH CHRONIC PLAQUE PSORIASIS AMONG CAUCASIANS.	2008	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
3  4184  35 META-PREDICTION OF MTHFR GENE POLYMORPHISM-MUTATIONS, AIR POLLUTION, AND RISKS OF LEUKEMIA AMONG WORLD POPULATIONS. THE MAJOR OBJECTIVE OF THIS STUDY WAS TO EXAMINE THE ASSOCIATION BETWEEN METHYLENETETRAHYDROFOLATE REDUCTASE (MTHFR) POLYMORPHISMS AND THE RISK OF VARIOUS TYPES OF LEUKEMIAS ACROSS THE LIFESPANS OF CHILDREN AND ADULTS BY USING THE META-PREDICTIVE TECHNIQUES. THE SECONDARY OBJECTIVE WAS TO EXAMINE THE INTERACTIONS AMONG EPIGENETIC RISK FACTORS (INCLUDING AIR POLLUTION), MTHFR POLYMORPHISMS, AND THE RISKS OF DEVELOPING LEUKEMIA. WE COMPLETED A COMPREHENSIVE SEARCH OF 6 DATABASES TO FIND 54 STUDIES (10,033 LEUKEMIA CASES AND 15,835 CONTROLS) FOR MTHFR 677, AND 43 STUDIES (8,868 CASES AND 14,301 CONTROLS) FOR MTHFR 1298, PUBLISHED FROM 1999 TO 2014. THE RESULTS REVEALED THAT, IN EUROPEAN POPULATIONS; CHILDHOOD POPULATIONS; CHILDREN FROM EUROPE, EAST ASIA, AND AMERICA; AND CHILDREN WITH ACUTE LYMPHOCYTIC LEUKEMIA (ALL), MTHFR 677 POLYMORPHISMS (BOTH TT AND CT TYPES TOGETHER AND INDIVIDUALLY) ARE PROTECTIVE, WHILE CC WILDTYPE WAS LEUKEMOGENIC. IN ADDITION, MTHFR 1298 POLYMORPHISMS WERE PROTECTIVE AGAINST ALL AND ACUTE MYELOID LEUKEMIA IN EUROPEAN CHILDREN, AND IN CHRONIC MYELOID LEUKEMIA IN ALL ADULTS WORLDWIDE AND AMERICAN ADULTS. AIR POLLUTION PLAYED A ROLE IN THE INCREASED POLYMORPHISMS OF MTHFR 677 GENOTYPES IN CHILDHOOD LEUKEMIA.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
4  1189  44 CORRELATION BETWEEN GLOBAL METHYLATION LEVEL OF PERIPHERAL BLOOD LEUKOCYTES AND SERUM C REACTIVE PROTEIN LEVEL MODIFIED BY MTHFR POLYMORPHISM: A CROSS-SECTIONAL STUDY. BACKGROUND: CHRONIC INFLAMMATORY CONDITIONS ARE ASSOCIATED WITH HIGHER TUMOR INCIDENCE THROUGH EPIGENETIC AND GENETIC ALTERATIONS. HERE, WE FOCUSED ON AN ASSOCIATION BETWEEN AN INFLAMMATION MARKER, C-REACTIVE-PROTEIN (CRP), AND GLOBAL DNA METHYLATION LEVELS OF PERIPHERAL BLOOD LEUKOCYTES. METHODS: THE SUBJECTS WERE 384 HEALTHY JAPANESE WOMEN ENROLLED AS THE CONTROL GROUP OF A CASE-CONTROL STUDY FOR BREAST CANCER CONDUCTED FROM 2001 TO 2005. GLOBAL DNA METHYLATION WAS QUANTIFIED BY LUMINOMETRIC METHYLATION ASSAY (LUMA). RESULTS: WITH ADJUSTMENT FOR LIFESTYLE-RELATED FACTORS, INCLUDING FOLATE INTAKE, THE GLOBAL DNA METHYLATION LEVEL OF PERIPHERAL BLOOD LEUKOCYTES WAS SIGNIFICANTLY BUT WEAKLY INCREASED BY 0.43% PER QUARTILE CATEGORY FOR CRP (P FOR TREND = 0.010). ESTIMATED METHYLATION LEVELS STRATIFIED BY CRP QUARTILE WERE 70.0%, 70.8%, 71.4%, AND 71.3%, RESPECTIVELY. IN ADDITION, INTERACTION BETWEEN POLYMORPHISM OF MTHFR (RS1801133, KNOWN AS C677T) AND CRP WAS SIGNIFICANT (P FOR INTERACTION = 0.046); THE GLOBAL METHYLATION LEVEL WAS SIGNIFICANTLY INCREASED BY 0.61% PER QUARTILE CATEGORY FOR CRP IN THE CT/TT GROUP (THOSE WITH THE MINOR ALLELE T, P FOR TREND = 0.001), WHEREAS NO ASSOCIATION WAS OBSERVED IN THE CC GROUP (WILD TYPE). CONCLUSIONS: OUR STUDY SUGGESTS THAT CRP CONCENTRATION IS WEAKLY ASSOCIATED WITH GLOBAL DNA METHYLATION LEVEL. HOWEVER, THIS ASSOCIATION WAS OBSERVED MORE CLEARLY IN INDIVIDUALS WITH THE MINOR ALLELE OF THE MTHFR MISSENSE SNP RS1801133. BY ELUCIDATING THE COMPLEX MECHANISM OF THE REGULATION OF DNA METHYLATION BY BOTH ACQUIRED AND GENETIC FACTORS, OUR RESULTS MAY BE IMPORTANT FOR CANCER PREVENTION.	2018	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
5  5904  32 T677T METHYLENETETRAHYDROFOLATE REDUCTASE SINGLE NUCLEOTIDE POLYMORPHISMS INCREASED PREVALENCE IN A SUBGROUP OF INFERTILE PATIENTS WITH ENDOMETRIOSIS. BACKGROUND: APPROXIMATELY 10% (190 MILLION) OF WOMEN WORLDWIDE ARE AFFECTED BY ENDOMETRIOSIS, ECTOPIC DEPOSITS OF ENDOMETRIAL TISSUE THAT CREATE A MAJOR SOURCE OF PAIN THAT AFFECTS LIFESTYLE AND REPRODUCTIVE FUNCTION. THE PATHOGENESIS OF ENDOMETRIOSIS IS AN ESTROGEN-DEPENDENT INFLAMMATORY PROCESS, INFLUENCED/CATALYZED BY OXIDATIVE STRESS AND CONSEQUENTLY DEFECTIVE METHYLATION, WITH BIOCHEMICAL FEATURES CENTERED AROUND THE FOLATE AND ONE-CARBON CYCLES. WE AIMED TO DETERMINE WHETHER A LINK COULD BE FOUND BETWEEN THE TWO MAJOR METHYLENETETRAHYDROFOLATE REDUCTASE SINGLE NUCLEOTIDE POLYMORPHISMS (MTHFR SNPS), C.677C>T AND C.1298A>C, INVOLVED IN METHYLATION PROCESS/EPIGENETIC MARKING FAILURES, AND ENDOMETRIOSIS. MATERIAL AND METHODS: WE STUDIED A POPULATION OF 158 PATIENTS IN A GROUP OF >1500 REFERRED FOR TREATMENT OF INFERTILITY. ALL THE PATIENTS HAD EXPERIENCED >2 FAILED ASSISTED REPRODUCTIVE TECHNOLOGY CYCLES AND/OR >2 MISCARRIAGES, A CLASSICAL COHORT FOR INVESTIGATION IN OUR GROUP. PATIENTS WITH ENDOMETRIOSIS HAD AT LEAST STAGE 2+ DISEASE CONFIRMED BY LAPAROSCOPY. RESULTS: THE PREVALENCE OF THE HOMOZYGOUS C.677C>T ISOFORM IS DOUBLED IN THE ENDOMETRIOSIS GROUP, 21.5% VERSUS 10.2% IN THE NON-ENDOMETRIOSIS GROUP (P > 0.01). SYMMETRICALLY, THE PERCENTAGE OF PATIENTS IN THE ENDOMETRIOSIS GROUP WITH THE WILD TYPE MTHFR SIGNIFICANTLY DECREASED BY ONE-HALF (8.2%-17.2%) IN THE NON-ENDOMETRIOSIS GROUP (P < 0.001). CONCLUSION: DETERMINATION OF MTHFR C.677C>T SHOULD NOT BE OVERLOOKED IN PATIENTS WITH HARMFUL ENDOMETRIOSIS AFFECTING THEIR FERTILITY. AS FOLATES METABOLISM IS IMPAIRED IN THESE MTHFR SNPS CARRIER PATIENTS, CO-TREATMENT WITH 5-METHYL FOLATE MAY CONSTITUTE A SUCCESSFUL (CO)-TREATMENT MODALITY.	2022	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
6  3442  43 HYPERMETHYLATION IN THE PROMOTER OF THE MTHFR GENE IS ASSOCIATED WITH DIABETIC COMPLICATIONS AND BIOCHEMICAL INDICATORS. BACKGROUND: DNA METHYLATION IS AN EPIGENETIC MECHANISM FOR REGULATING THE TRANSCRIPTION OF MANY GENES AND HAS BEEN LINKED TO THE DEVELOPMENT OF VARIOUS DISEASES. A PROMISING GENE TO INVESTIGATE IS METHYLENETETRAHYDROFOLATE REDUCTASE (MTHFR), SINCE THE ENZYME METHYLENETETRAHYDROFOLATE REDUCTASE (MTHFR) PROMOTES METHYL RADICAL SYNTHESIS IN THE HOMOCYSTEINE CYCLE AND CAN PROVIDE METHYL GROUPS FOR DNA METHYLATION. IN ADDITION, SEVERAL STUDIES HAVE CORRELATED GENE POLYMORPHISMS OF THIS ENZYME WITH A GREATER RISK OF DIABETES, BUT LITTLE IS KNOWN REGARDING THE RELATIONSHIP BETWEEN EPIGENETIC CHANGES IN THIS GENE AND DIABETES AND ITS COMPLICATIONS. THE AIM OF THIS STUDY WAS TO INVESTIGATE THE RELATIONSHIP BETWEEN METHYLATION PROFILE IN THE MTHFR GENE PROMOTER AND BIOCHEMICAL, INFLAMMATORY AND OXIDATIVE STRESS MARKERS IN INDIVIDUALS WITH TYPE 2 DIABETES (T2DM) WHO HAVE BEEN DIAGNOSED FOR 5-10 YEARS WITH OR WITHOUT DIABETIC RETINOPATHY (DR) AND NEPHROPATHY (DN). METHODS: SPECIFIC PCR FOR METHYLATION (MSP) WAS USED TO ANALYZE MTHFR METHYLATION PROFILE IN LEUCOCYTES DNA. BIOCHEMICAL MARKERS (GLYCEMIA, GLYCATED HEMOGLOBIN, TOTAL CHOLESTEROL, LDL, HDL, TRIGLYCERIDES, SERUM CREATININE), INFLAMMATORY MARKERS (C-REACTIVE PROTEIN AND ALPHA-1 ACID GLYCOPROTEIN) AND OXIDATIVE STRESS (TOTAL ANTIOXIDANT AND MALONALDEHYDE) WERE DETERMINED IN PERIPHERIC BLOOD SAMPLES AND MICROALBUMINURIA IN 24 H URINE SAMPLES. THE X(2) AND MANN-WHITNEY STATISTICAL TESTS WERE PERFORMED AND P < 0.05 WERE CONSIDERED SIGNIFICANT. RESULTS: THE HYPERMETHYLATED PROFILE WAS MOST FREQUENTLY OBSERVED IN INDIVIDUALS WITH RETINOPATHY (P < 0.01) AND WAS ASSOCIATED WITH HIGHER TOTAL CHOLESTEROL AND LDL LEVELS (P = 0.0046, 0.0267, RESPECTIVELY). INDIVIDUALS WITH DN AND HYPERMETHYLATED PROFILES HAD HIGHER LEVELS OF ALPHA-1 ACID GLYCOPROTEIN (P = 0.0080) AND TOTAL ANTIOXIDANT CAPACITY (P = 0.0169) COMPARED TO SUBJECTS WITHOUT COMPLICATIONS. CONCLUSIONS: HYPERMETHYLATION IN THE PROMOTER OF THE MTHFR GENE IS ASSOCIATED WITH THE OCCURRENCE OF DR AND WITH BIOCHEMICAL, INFLAMMATORY AND OXIDATIVE STRESS PARAMETERS IN THE CONTEXT OF CHRONIC COMPLICATIONS.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
7  4251  36 METHYLENETETRAHYDROFOLATE REDUCTASE (MTHFR) GENE POLYMORPHISMS RESULTING IN SUBOPTIMAL OOCYTE MATURATION: A DISCUSSION OF FOLATE STATUS, NEURAL TUBE DEFECTS, SCHIZOPHRENIA, AND VASCULOPATHY. SEVERAL CONDITIONS APPARENT AT BIRTH, E.G., NEURAL TUBE DEFECTS (NTDS) AND CARDIAC ANOMALIES, ARE ASSOCIATED WITH POLYMORPHISMS IN FOLATE-RELATED GENES, SUCH AS THE 677C --> T POLYMORPHISM OF THE METHYLENETETRAHYDROFOLATE REDUCTASE (MTHFR) GENE. SIMILAR ASSOCIATIONS HAVE BEEN ESTABLISHED FOR SEVERAL CONSTITUTIONAL CHRONIC DISEASES IN ADULTHOOD, SUCH AS SCHIZOPHRENIA, CARDIOVASCULAR DISEASES, DEMENTIA, AND EVEN NEOPLASIAS IN DIFFERENT ORGAN SYSTEMS. THIS SPECTRUM OF DEVELOPMENTAL ANOMALIES AND CONSTITUTIONAL DISEASES MAY BE LINKED TO HIGH-RISK CONCEPTIONS RELATED TO PREOVULATORY OVERRIPENESS OVOPATHY (PROO). SOME DEVELOPMENTAL ANOMALIES, SUCH AS NTDS, ARE TO A LARGE EXTENT PREVENTED BY SUPPLEMENTATION OF FOLIC ACID BEFORE CONCEPTION, BUT SUPPLEMENTATION DOES NOT SEEM TO PREVENT CARDIOVASCULAR DISEASE OR COGNITIVE DECLINE. THESE DIVERGING RESULTS CAN BE ELUCIDATED BY INTRODUCTION OF THE PROO CONCEPT, AS MTHFR POLYMORPHISMS AND INHERENT LOW FOLATE LEVELS INDUCE BOTH NON-OPTIMAL MATURATION OF THE OOCYTE AND UNSUCCESSFUL DNA METHYLATION AND DEMETHYLATION, I.E. EPIGENETIC MUTATIONS. THE PROO CONCEPT IS TESTABLE AND PREDICTS IN A RANDOM POPULATION THE FOLLOWING: (1) FEMALE CARRIERS OF SPECIFIC GENETIC MTHFR VARIANTS EXHIBIT MORE OVULATORY DISTURBANCES AND INHERENT SUBFECUNDITY TRAITS, (2) DESCENDENTS FROM A CARRIER MOTHER, WHEN COMPARED WITH THOSE FROM A WILD-TYPE MOTHER, ARE MORE FREQUENTLY CONCEIVED IN PROO HIGH-RISK CONDITIONS AND, THUS, (3) DISADVANTAGED IN LIFE EXPECTANCY. IF SO, SOME MTHFR POLYMORPHISMS REPRESENT A NOVEL, GENETICALLY DETERMINED, PROO HIGH-RISK CONCEPTION CATEGORY COMPARABLE TO THOSE WHICH ARE ENVIRONMENTALLY AND BEHAVIORLY INFLUENCED. THESE HIGH-RISK CONDITIONS MAY CAUSE DEVELOPMENTAL ANOMALIES AND DEFECTIVE EPIGENETIC REPROGRAMMING IN PROGENY. THE INTERACTION BETWEEN GENETIC AND ENVIRONMENTAL FACTORS IS A PLAUSIBLE MECHANISM OF MULTIFACTORIAL INHERITANCE.	2008	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
8  2995  41 GENETIC POLYMORPHISMS IN FOLATE PATHWAY ENZYMES, DRD4 AND GSTM1 ARE RELATED TO TEMPOROMANDIBULAR DISORDER. BACKGROUND: TEMPOROMANDIBULAR DISORDER (TMD) IS A MULTIFACTORIAL SYNDROME RELATED TO A CRITICAL PERIOD OF HUMAN LIFE. TMD HAS BEEN ASSOCIATED WITH PSYCHOLOGICAL DYSFUNCTIONS, OXIDATIVE STATE AND SEXUAL DIMORPHISM WITH COINCIDENTAL OCCURRENCE ALONG THE PUBERTAL DEVELOPMENT. IN THIS WORK WE STUDY THE ASSOCIATION BETWEEN TMD AND GENETIC POLYMORPHISMS OF FOLATE METABOLISM, NEUROTRANSMISSION, OXIDATIVE AND HORMONAL METABOLISM. FOLATE METABOLISM, WHICH DEPENDS ON GENES VARIATIONS AND DIET, IS DIRECTLY INVOLVED IN GENETIC AND EPIGENETIC VARIATIONS THAT CAN INFLUENCE THE CHANGES OF LAST GROWING PERIOD OF DEVELOPMENT IN HUMAN AND THE APPEARANCE OF THE TMD. METHODS: A CASE-CONTROL STUDY WAS DESIGNED TO EVALUATE THE IMPACT OF GENETIC POLYMORPHISMS ABOVE DESCRIBED ON TMD. A TOTAL OF 229 INDIVIDUALS (69% WOMEN) WERE INCLUDED AT THE STUDY; 86 WERE PATIENTS WITH TMD AND 143 WERE HEALTHY CONTROL SUBJECTS. SUBJECTS UNDERWENT TO A CLINICAL EXAMINATION FOLLOWING THE GUIDELINES BY THE RESEARCH DIAGNOSTIC CRITERIA FOR TEMPOROMANDIBULAR DISORDERS (RDC/TMD). GENOTYPING OF 20 SINGLE NUCLEOTIDE POLYMORPHISMS (SNPS), DIVIDED IN TWO GROUPS, WAS PERFORMED BY MULTIPLEX MINISEQUENCING PRECEDED BY MULTIPLEX PCR. OTHER SEVEN GENETIC POLYMORPHISMS DIFFERENT FROM SNPS (DELETIONS, INSERTIONS, TANDEM REPEAT, NULL GENOTYPE) WERE ACHIEVED BY A MULTIPLEX-PCR. A CHI-SQUARE TEST WAS PERFORMED TO DETERMINE THE DIFFERENCES IN GENOTYPE AND ALLELIC FREQUENCIES BETWEEN TMD PATIENTS AND HEALTHY SUBJECTS. TO ESTIMATE TMD RISK, IN THOSE POLYMORPHISMS THAT SHOWN SIGNIFICANT DIFFERENCES, ODDS RATIO (OR) WITH A 95% OF CONFIDENCE INTERVAL WERE CALCULATED. RESULTS: SIX OF THE POLYMORPHISMS SHOWED STATISTICAL ASSOCIATIONS WITH TMD. FOUR OF THEM ARE RELATED TO ENZYMES OF FOLATES METABOLISM: ALLELE G OF SERINE HYDOXYMETHYLTRANSFERASE 1 (SHMT1) RS1979277 (OR = 3.99; 95%CI 1.72, 9.25; P = 0.002), ALLELE G OF SHMT1 RS638416 (OR = 2.80; 95%CI 1.51, 5.21; P = 0.013), ALLELE T OF METHYLENTETRAHYDROFOLATE DEHYDROGENASE (MTHFD) RS2236225 (OR = 3.09; 95%CI 1.27, 7.50; P = 0.016) AND ALLELE A OF METHIONINE SYNTHASE REDUCTASE (MTRR) RS1801394 (OR = 2.35; 95CI 1.10, 5.00; P = 0.037). AN INFLAMMATORY OXIDATIVE STRESS ENZYME, GLUTHATIONE S-TRANFERASE MU-1(GSTM1), NULL ALLELE (OR = 2.21; 95%CI 1.24, 4.36; P = 0.030) AND A NEUROTRANSMISSION RECEPTOR, DOPAMINE RECEPTOR D4 (DRD4), LONG ALLELE OF 48 BP-REPEAT (OR = 3.62; 95%CI 0.76, 17.26; P = 0.161). CONCLUSIONS: SOME GENETIC POLYMORPHISMS RELATED TO FOLATES METABOLISM, INFLAMMATORY OXIDATIVE STRESS, AND NEUROTRANSMISSION RESPONSES TO PAIN, HAS BEEN SIGNIFICANTLY ASSOCIATED TO TMD SYNDROME.	2011	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
9   517  36 ASSOCIATION STUDY OF FOXO3A SINGLE-NUCLEOTIDE POLYMORPHISM AND BRONCHIAL ASTHMA IN EGYPTIAN CHILDREN. ASTHMA IS THE MOST COMMON CHRONIC ILLNESS IN CHILDREN AND IS A LEADING CAUSE OF CHILDHOOD HOSPITALIZATION AND SCHOOL ABSENTEEISM. ASTHMA PRESENTS WITH DIFFERENT PHENOTYPES DEPENDING ON AGE, GENDER, GENETIC BACKGROUND, ENVIRONMENTAL EXPOSURES AND EPIGENETIC FACTORS. FORKHEAD BOX O3 (FOXO3) IS A TRANSCRIPTION FACTOR INVOLVED IN THE PATHOGENESIS OF A NUMBER OF INFLAMMATORY AND RESPIRATORY DISEASES. THE STUDY AIMS TO INVESTIGATE THE ASSOCIATION BETWEEN THE SNP RS13217795 IN FOXO3 GENE AND PEDIATRIC ONSET ASTHMA IN THE EGYPTIAN POPULATION. NINETY ASTHMATICS AND 160 HEALTHY CONTROLS WERE SUBJECTED TO GENOTYPING OF FOXO3 SNP (RS13217795) USING THE PCR-RFLP METHOD. THE PROPORTION OF HOMOZYGOUS (CC) AND HETEROZYGOUS (CT) GENOTYPES WAS LOWER IN THE ASTHMATIC GROUP COMPARED TO THE CONTROL GROUP BUT STATISTICALLY INSIGNIFICANT; P > 0.05. ON THE OTHER HAND THE PROPORTION OF THE MUTANT HOMOZYGOUS (TT) GENOTYPE IN ASTHMATIC GROUP WAS HIGHER; 30 (33.3%) THAN THE CONTROL GROUP; 28(17.5%), THE DIFFERENCE WAS SIGNIFICANT IN RECESSIVE MODEL OF DISEASE PENETRANCE WITH ODDS RATIO OR (95% CI) OF 2.4(1 - 5.49) AND P=0.039. THIS ASSOCIATION WAS MORE PRONOUNCED IN MALE GENDER; OR AND 95% CI OF 5.3 (1.4- 19.3) AND P=0.01. IN CONCLUSIONS, EGYPTIAN CHILDREN CARRYING THE MUTANT (TT) GENOTYPE WERE AT HIGHER RISK TO DEVELOP ASTHMA WITH A HIGHER RISK IN MALE GENDER.	2020	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
10  1356  24 DEVELOPMENT OF A DIETARY METHYL DONOR FOOD FREQUENCY QUESTIONNAIRE TO ASSESS FOLATE AND VITAMIN B(12) STATUS IN CHILDREN WITH CHRONIC HEPATITIS B VIRUS INFECTION. OBJECTIVE: TO DEVELOP A DIETARY METHYL DONOR FOOD FREQUENCY QUESTIONNAIRE (DMD-FFQ) THAT IS VALIDATED IN A COHORT OF US CHILDREN AND TO DETERMINE WHETHER THE CONSUMPTION OF FOLATE AND VITAMIN B(12), PRINCIPAL DMDS, CORRELATES WITH HBV DNA LEVELS AND ITS METHYLATION DENSITY. STUDY DESIGN: WE DEVELOPED A SEMIQUANTITATIVE DMD-FFQ TO ESTIMATE INTAKE OF FOLATE AND VITAMIN B(12) AND VALIDATED THIS INSTRUMENT AGAINST A 24-HOUR DIETARY RECALL AND BIOMARKERS-RED BLOOD CELL FOLATE, SERUM VITAMIN B(12), AND HOMOCYSTEINE-IN 35 CHILDREN WITH CHRONIC HBV INFECTION WITHOUT OTHER MEDICAL COMORBIDITIES. ESTIMATES OF DMD, AS WELL AS THE SERUM BIOMARKERS, WERE CORRELATED WITH THE METHYLATION DENSITY OF HBV CPG ISLAND 2 AND HBV DNA LEVELS. RESULTS: FOLATE PER KILOGRAM OF BODY WEIGHT BY THE DMD-FFQ CORRELATED POSITIVELY WITH 24-HOUR RECALL (R = 0.60; P < .001) AND RED BLOOD CELL FOLATE (R = 0.40; P = .02), AND NEGATIVELY WITH HOMOCYSTEINE (R = -0.54; P < .001). VITAMIN B(12) PER KILOGRAM BY DMD-FFQ ALSO CORRELATED POSITIVELY WITH 24-HOUR RECALL (R = 0.57; P < .001) AND SERUM VITAMIN B(12) (R = 0.36, P = .04), AND NEGATIVELY WITH HOMOCYSTEINE (R = -0.44; P = .008). NEITHER DMD INTAKE (FROM DMD-FFQ OR 24-HOUR RECALL) NOR SERUM BIOMARKERS CORRELATED WITH HBV DNA LEVELS OR ITS METHYLATION DENSITY. CONCLUSIONS: OUR DMD-FFQ CORRELATES WELL WITH A 24-HOUR RECALL AND CIRCULATING BIOMARKERS. ALTHOUGH LITTLE EVIDENCE EXISTED THAT CONSUMPTION OF THESE MICRONUTRIENTS CORRELATED WITH HBV REPLICATION, THIS TOOL COULD PROVE USEFUL FOR INVESTIGATING EPIGENETIC MODIFICATION BY DIET FOR SEVERAL PEDIATRIC DISEASES.	2018	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
11  4249  36 METHYLATION-BASED BIOLOGICAL AGE AND BREAST CANCER RISK. BACKGROUND: AGE IS ONE OF THE STRONGEST PREDICTORS OF CANCER, CHRONIC DISEASE, AND MORTALITY, BUT BIOLOGICAL RESPONSES TO AGING DIFFER AMONG PEOPLE. EPIGENETIC DNA MODIFICATIONS HAVE BEEN USED TO ESTIMATE "BIOLOGICAL AGE," WHICH MAY BE A USEFUL PREDICTOR OF DISEASE RISK. WE TESTED THIS HYPOTHESIS FOR BREAST CANCER. METHODS: USING A CASE-COHORT APPROACH, WE MEASURED BASELINE BLOOD DNA METHYLATION OF 2764 WOMEN ENROLLED IN THE SISTER STUDY, 1566 OF WHOM SUBSEQUENTLY DEVELOPED BREAST CANCER AFTER AN AVERAGE OF 6 YEARS. USING THREE PREVIOUSLY ESTABLISHED METHYLATION-BASED "CLOCKS" (HANNUM, HORVATH, AND LEVINE), WE DEFINED BIOLOGICAL AGE ACCELERATION FOR EACH WOMAN BY COMPARING HER ESTIMATED BIOLOGICAL AGE WITH HER CHRONOLOGICAL AGE. HAZARD RATIOS AND 95% CONFIDENCE INTERVALS FOR BREAST CANCER RISK WERE ESTIMATED USING COX REGRESSION MODELS. ALL STATISTICAL TESTS WERE TWO-SIDED. RESULTS: EACH OF THE THREE CLOCKS SHOWED THAT BIOLOGICAL AGE ACCELERATION WAS STATISTICALLY SIGNIFICANTLY ASSOCIATED WITH INCREASED RISK OF DEVELOPING BREAST CANCER (5-YEAR AGE ACCELERATION, HANNUM'S CLOCK: HAZARD RATIO [HR] = 1.10, 95% CONFIDENCE INTERVAL [CI] = 1.00 TO 1.21, P = .04; HORVATH'S CLOCK: HR = 1.08, 95% CI = 1.00 TO 1.17, P = .04; LEVINE'S CLOCK: HR = 1.15, 95% CI = 1.07 TO 1.23, P < .001). FOR LEVINE'S CLOCK, EACH 5-YEAR ACCELERATION IN BIOLOGICAL AGE CORRESPONDED WITH A 15% INCREASE IN BREAST CANCER RISK. ALTHOUGH BIOLOGICAL AGE MAY ACCELERATE WITH MENOPAUSAL TRANSITION, AGE ACCELERATION IN PREMENOPAUSAL WOMEN INDEPENDENTLY PREDICTED BREAST CANCER. CASE-ONLY ANALYSIS SUGGESTED THAT, AMONG WOMEN WHO DEVELOP BREAST CANCER, INCREASED AGE ACCELERATION IS ASSOCIATED WITH INVASIVE CANCER (ODDS RATIO FOR INVASIVE = 1.09, 95% CI = 0.98 TO 1.22, P = .10). CONCLUSIONS: DNA METHYLATION-BASED MEASURES OF BIOLOGICAL AGE MAY BE IMPORTANT PREDICTORS OF BREAST CANCER RISK.	2019	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
12  1781  28 EFFECT OF 1 YEAR B AND D VITAMIN SUPPLEMENTATION ON LINE-1 REPETITIVE ELEMENT METHYLATION IN OLDER SUBJECTS. BACKGROUND: DISTURBED DNA METHYLATION IS CAUSALLY RELATED TO CHRONIC DISEASES LIKE CANCER AND ATHEROSCLEROSIS. B VITAMINS ARE COFACTORS REQUIRED FOR METHYL GROUP SYNTHESIS AND MAY THEREFORE AFFECT DNA METHYLATION. VITAMIN D HAS EPIGENETIC EFFECTS. WE TESTED IF B AND D VITAMIN SUPPLEMENTATION HAS AN EFFECT ON GENOMIC LONG INTERSPERSED NUCLEAR ELEMENT-1 (LINE-1) METHYLATION AND THE METABOLITES S-ADENOSYLMETHIONINE (SAM) AND S-ADENOSYLHOMOCYSTEINE (SAH). METHODS: FIFTY SUBJECTS (MEDIAN AGE 68.0 YEARS) WERE SUPPLEMENTED WITH A DAILY ORAL DOSE OF B VITAMINS (500 MICROG FOLIC ACID, 500 MICROG VITAMIN B12 AND 50 MG VITAMIN B6), 1200 IU VITAMIN D AND 456 MG CALCIUM. FASTING BLOOD SAMPLES WERE COLLECTED BEFORE AND AFTER 1 YEAR OF SUPPLEMENTATION. LINE-1 METHYLATION WAS DETERMINED IN GENOMIC DNA FROM BLOOD CELLS AS A SURROGATE FOR WHOLE GENOME METHYLATION. IN ADDITION, SAM, SAH AND TOTAL HOMOCYSTEINE (THCY) WERE MEASURED IN PLASMA SAMPLES. RESULTS: PLASMA HOMOCYSTEINE DECREASED SIGNIFICANTLY AFTER SUPPLEMENTATION (12.8 VS. 9.1 MICROMOL/L; P<0.05), WHEREAS SAM, SAH, THE SAM/SAH RATIO AND LINE-1 METHYLATION DID NOT CHANGE SIGNIFICANTLY. LINE-1 METHYLATION WAS NOT SIGNIFICANTLY CORRELATED WITH SAH, HOMOCYSTEINE OR B VITAMINS. CONCLUSIONS: LONG-TERM VITAMIN B SUPPLEMENTATION HAD NO EFFECT ON LINE-1 METHYLATION IN BLOOD CELLS NOR ON PLASMA LEVELS OF SAM AND SAH. VITAMIN B AND D SUPPLEMENTATION SEEMS TO HAVE NO EFFECT ON DNA METHYLATION, ESPECIALLY IN CASES WHERE NO SEVERE DEFICIENCY EXISTS.	2013	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
13  5700  45 SINGLE NUCLEOTIDE POLYMORPHISM IN DNMT3B PROMOTER AND THE RISK FOR IDIOPATHIC THROMBOCYTOPENIC PURPURA IN CHINESE POPULATION. OBJECTIVE: EPIGENETIC CHANGES IN GENE EXPRESSION, INCLUDING DNA METHYLATION AND HISTONE MODIFICATIONS, MIGHT CONTRIBUTE TO AUTOIMMUNITY. DNA METHYLATION IS MEDIATED BY A FAMILY OF DNA METHYLTRANSFERASES. POLYMORPHISMS OF THE DNA METHYLTRANSFERASE 3B (DNMT3B) GENE MAY INFLUENCE DNMT3B ACTIVITY ON DNA METHYLATION, THEREBY MODULATING THE SUSCEPTIBILITY TO SOME DISEASES. THE PURPOSE OF THIS STUDY WAS TO INVESTIGATE THE ASSOCIATION BETWEEN THE SINGLE NUCLEOTIDE POLYMORPHISM (SNP) IN PROMOTER OF THE DNMT3B GENE AND THE RISK FOR DEVELOPMENT OF IDIOPATHIC THROMBOCYTOPENIC PURPURA (ITP). METHODS: IN THIS HOSPITAL-BASED CASE-CONTROL STUDY, THE DNMT3B SNP WAS GENOTYPED IN 201 PATIENTS WITH ITP AND 136 HEALTHY CONTROLS BY POLYMERASE CHAIN REACTION-RESTRICTION FRAGMENT LENGTH POLYMORPHISM. RESULTS: THE C/C GENOTYPE WAS NOT DETECTED IN BOTH THE PATIENTS WITH ITP AND THE CONTROLS. IN THE CONTROLS, THE FREQUENCIES OF T/T AND C/T GENOTYPES AND T AND C ALLELES WERE 97.8%, 2.2%, 98.9%, AND 1.1%, RESPECTIVELY. THERE WAS NO SIGNIFICANT DIFFERENCE IN GENOTYPE AND ALLELE DISTRIBUTION BETWEEN THE PATIENTS WITH ITP AND THE CONTROLS (P = 0.745 AND 0.747, RESPECTIVELY). NO SIGNIFICANT DIFFERENCE WAS OBSERVED IN GENOTYPE AND ALLELE DISTRIBUTION BETWEEN THE TWO GROUPS WHEN STRATIFIED BY THE AGE. THE SIMILAR RESULTS WERE SHOWN AMONG THE FOUR GROUPS OF PATIENTS WITH ITP: ACUTE CHILDHOOD, CHRONIC CHILDHOOD, ACUTE ADULT, AND CHRONIC ADULT. CONCLUSION: THIS POLYMORPHISM WAS DISTRIBUTED SIMILARLY BETWEEN THE PATIENTS WITH ITP AND THE CONTROLS. IT DEMONSTRATED THAT IT MAY NOT BE USED AS A STRATIFICATION MARKER TO PREDICT THE SUSCEPTIBILITY TO ITP, AT LEAST IN THE POPULATION OF NORTH CHINA.	2008	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
14  5108  42 POLYMORPHISMS OF TNF-ALPHA (- 308), IL-1BETA (+ 3954) AND IL1-RA (VNTR) ARE ASSOCIATED TO SEVERE STAGE OF ENDOMETRIOSIS IN MEXICAN WOMEN: A CASE CONTROL STUDY. BACKGROUND: ENDOMETRIOSIS IS AN ESTROGEN-DEPENDENT AND CHRONIC INFLAMMATORY DISEASE AFFECTING UP TO 10% OF WOMEN. IT IS THE RESULT OF A COMBINED INTERACTION OF GENETIC, EPIGENETIC, ENVIRONMENTAL, LIFESTYLE, REPRODUCTIVE AND LOCAL INFLAMMATORY FACTORS. IN THIS STUDY, WE INVESTIGATED WHETHER SINGLE NUCLEOTIDE POLYMORPHISMS (SNPS) MAPPING TO TNF-ALPHA (TNF, RS1800629) AND IL-1BETA (IL1B, RS1143634) AND VARIABLE NUMBER TANDEM REPEAT POLYMORPHISM MAPPING TO IL1-RA (IL1RN INTRON 2, RS2234663) GENETIC LOCI ARE ASSOCIATED WITH RISK FOR ENDOMETRIOSIS IN A MEXICAN MESTIZO POPULATION. METHODS: THIS STUDY INCLUDED 183 WOMEN WITH CONFIRMED ENDOMETRIOSIS (ENDO) DIAGNOSED AFTER SURGICAL LAPAROSCOPY AND 186 WOMEN WITH SATISFIED PARITY AND WITHOUT ENDOMETRIOSIS AS CONTROLS (CTR). PCR/RFLP TECHNIQUE WAS USED FOR GENOTYPING SNPS (RS1800629 AND RS1143634); PCR FOR GENOTYPING RS2234663. RESULTS: WE FOUND NO STATISTICAL DIFFERENCES IN AGE BETWEEN GROUPS NOR AMONG STAGES OF ENDOMETRIOSIS AND THE CTR GROUP. WE OBSERVED NO DIFFERENCE IN GENOTYPE AND ALLELE FREQUENCIES, NOR CARRIAGE RATE BETWEEN GROUPS IN NONE OF THE THREE STUDIED POLYMORPHISMS. THE PREVALENCE OF TNF*2-ALLELE HETEROZYGOTES (P = 0.025; OR 3.8), TNF*2-ALLELE (P = 0.029; OR 3.4), IL1B*2-ALLELE HETEROZYGOTES (P = 0.044; OR 2.69) AND ITS CARRIAGE RATE (P = 0.041; OR 2.64) IN ENDOMETRIOSIS STAGE IV WAS HIGHER THAN THE CTR GROUP. SURPRISINGLY, THE CARRIAGE RATE OF IL1RN*2-ALLELE (ENDO: P = 0.0004; OR 0.4; STAGE I: P = 0.002, OR 0.38; STAGE II: P = 0.002, OR 0.35; STAGE III: P = 0.003, OR 0.33), AS WELL AS THE IL1RN*2-ALLELE FREQUENCIES (ENDO: P = 0.0008, OR 0.55; I: P = 0.037, OR 0.60; II: P = 0.002, OR 0.41; III: P = 0.003, OR 0.38) WERE LOWER THAN THE CTR GROUP. WOMEN WITH ENDOMETRIOSIS STAGE IV (SEVERE) HAD FREQUENCIES MORE ALIKE TO THE CTR GROUP IN THE IL1RN*2 ALLELE FREQUENCY (31.2% VS. 27.2%) AND CARRIAGE RATE (37.5% VS. 41.9%). CONCLUSION: ALTHOUGH THESE POLYMORPHISMS ARE NOT ASSOCIATED WITH THE RISK OF ENDOMETRIOSIS, MEXICAN MESTIZO WOMEN WITH SEVERE STAGE OF ENDOMETRIOSIS HAVE HIGHER FREQUENCIES OF TNF*2-, IL1B*2- AND IL1RN*2-ALLELES, WHICH MAY EXPLAIN A POSSIBLE CORRELATION WITH DISEASE SEVERITY RATHER THAN PREDISPOSITION OR RISK.	2022	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
15  5683  29 SHORTER TELOMERE LENGTH IN PERIPHERAL BLOOD LYMPHOCYTES OF WORKERS EXPOSED TO POLYCYCLIC AROMATIC HYDROCARBONS. SHORTER TELOMERE LENGTH (TL) IN PERIPHERAL BLOOD LYMPHOCYTES (PBLS) IS PREDICTIVE OF LUNG CANCER RISK. POLYCYCLIC AROMATIC HYDROCARBONS (PAHS) ARE ESTABLISHED LUNG CARCINOGENS THAT CAUSE CHROMOSOME INSTABILITY. WHETHER PAH EXPOSURE AND ITS MOLECULAR EFFECTS ARE LINKED WITH SHORTER TL HAS NEVER BEEN EVALUATED. IN THE PRESENT STUDY, WE INVESTIGATED THE EFFECT OF CHRONIC EXPOSURE TO PAHS ON TL MEASURED IN PBLS OF POLISH MALE NON-CURRENT SMOKING COKEOVEN WORKERS AND MATCHED CONTROLS. PAH EXPOSURE AND MOLECULAR EFFECTS WERE CHARACTERIZED USING MEASURES OF INTERNAL DOSE (URINARY 1-PYRENOL), EFFECTIVE DOSE [ANTI-BENZO[A]PYRENE DIOLEPOXIDE (ANTI-BPDE)-DNA ADDUCT], GENETIC INSTABILITY (MICRONUCLEI, MN) AND DNA METHYLATION [P53 PROMOTER AND ALU AND LONG INTERSPERSED NUCLEAR ELEMENT-1 (LINE-1) REPETITIVE ELEMENTS, AS SURROGATE MEASURES OF GLOBAL METHYLATION] IN PBLS. TL WAS MEASURED BY REAL-TIME POLYMERASE CHAIN REACTION. COKEOVEN WORKERS WERE HEAVILY EXPOSED TO PAHS (79% EXCEEDED THE URINARY 1-PYRENOL BIOLOGICAL EXPOSURE INDEX) AND EXHIBITED LOWER TL (P = 0.038) THAN CONTROLS, AS WELL AS HIGHER LEVELS OF GENETIC AND CHROMOSOMAL ALTERATIONS [I.E. ANTI-BPDE-DNA ADDUCT AND MN (P < 0.0001)] AND EPIGENETIC CHANGES [I.E. P53 GENE-SPECIFIC PROMOTER AND GLOBAL METHYLATION (P <OR= 0.001)]. TL DECREASED WITH LONGER DURATION OF WORK AS COKEOVEN WORKER (P = 0.039) AND IN ALL SUBJECTS WITH HIGHER LEVELS OF ANTI-BPDE-DNA ADDUCT (P = 0.042), P53 HYPOMETHYLATION (P = 0.005) AND MN (P = 0.009). IN MULTIVARIATE ANALYSIS, YEARS OF WORK IN COKERY (P = 0.008) AND P53 HYPOMETHYLATION (P = 0.001) WERE THE PRINCIPAL DETERMINANTS OF SHORTER TL. OUR RESULTS INDICATE THAT SHORTER TL IS ASSOCIATED WITH CHRONIC PAH EXPOSURE. THE INTERRELATIONS WITH OTHER GENETIC AND EPIGENETIC MECHANISMS IN OUR DATA SUGGEST THAT SHORTER TL COULD BE A CENTRAL EVENT IN PAH CARCINOGENESIS.	2010	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
16  3387  24 HOMOCYSTEINE ASSOCIATED GENOMIC DNA HYPERMETHYLATION IN PATIENTS WITH CHRONIC ALCOHOLISM. HIGHER PLASMA HOMOCYSTEINE CONCENTRATIONS CAN INFLUENCE GENOMIC DNA METHYLATION IN PERIPHERAL BLOOD CELLS. IN THE PRESENT CONTROLLED STUDY WE OBSERVED A SIGNIFICANT INCREASE (10%) OF GENOMIC DNA METHYLATION IN PATIENTS WITH ALCOHOLISM (T = -3.16, DF = 158, P = 0.002) WHICH WAS SIGNIFICANTLY ASSOCIATED WITH THEIR ELEVATED HOMOCYSTEINE LEVELS (MULTIPLE LINEAR REGRESSION, P < 0.001). SINCE METHYLATION OF DNA IS AN IMPORTANT EPIGENETIC FACTOR IN REGULATION OF GENE EXPRESSION THESE FINDINGS MAY HAVE IMPORTANT IMPLICATIONS FOR A POSSIBLE SUBSEQUENT DERANGEMENT OF EPIGENETIC CONTROL THESE PATIENTS.	2004	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
17   403  44 ANALYSIS OF EPIGENETIC AGE ACCELERATION AND HEALTHY LONGEVITY AMONG OLDER US WOMEN. IMPORTANCE: ACCELERATED BIOLOGICAL AGING IS ASSOCIATED WITH DECREASED PHYSICAL CAPABILITY AND COGNITIVE FUNCTIONING, WHICH ARE ASSOCIATED WITH INCREASED RISK OF MORBIDITY AND MORTALITY. OBJECTIVE: WE INVESTIGATED ASSOCIATIONS BETWEEN EPIGENETIC AGE ACCELERATION (EAA), A BIOMARKER ASSOCIATED WITH AGING, AND HEALTHY LONGEVITY AMONG OLDER WOMEN. DESIGN, SETTING, AND PARTICIPANTS: THIS COHORT STUDY WAS A SECONDARY ANALYSIS OF PARTICIPANTS IN THE WOMEN'S HEALTH INITIATIVE (WHI) WHO WERE ELIGIBLE TO SURVIVE TO AGE 90 YEARS BY SEPTEMBER 30, 2020. PARTICIPANTS WERE LOCATED IN MULTIPLE CENTERS. THIS STUDY WAS RESTRICTED TO WOMEN WITH GENOME-WIDE DNA METHYLATION DATA, GENERATED FROM BASELINE BLOOD SAMPLES WITHIN 3 WHI ANCILLARY STUDIES. MEDIAN (IQR) FOLLOW-UP TIMES FROM BASELINE WERE 21.6 (19.6-22.9) YEARS AND 21.4 (19.8-22.7) YEARS FOR WOMEN WHO SURVIVED TO AGE 90 YEARS WITH AND WITHOUT INTACT MOBILITY, RESPECTIVELY, AND 13.2 (8.8-16.7) FOR WOMEN WHO DID NOT SURVIVE TO AGE 90 YEARS. DATA WERE ANALYZED FROM DECEMBER 2020 TO JULY 2021. EXPOSURES: EAA WAS ESTIMATED USING 4 ESTABLISHED "CLOCKS": HORVATH PANTISSUE, HANNUM, PHENO, AND GRIM. MAIN OUTCOMES AND MEASURES: USING MULTINOMIAL LOGISTIC REGRESSION, ODDS RATIOS (ORS) AND 95% CIS WERE ESTIMATED FOR 3 HEALTHY LONGEVITY OUTCOMES FOR EACH CLOCK: SURVIVAL TO AGE 90 YEARS WITH INTACT MOBILITY, SURVIVAL TO AGE 90 YEARS WITHOUT INTACT MOBILITY, AND NO SURVIVAL TO AGE 90 YEARS. RESULTS: AMONG 1813 WOMEN, THERE WERE 464 WOMEN (MEAN [SD] AGE AT BASELINE, 71.6 [3.5] YEARS) WHO SURVIVED TO AGE 90 YEARS WITH INTACT MOBILITY AND COGNITIVE FUNCTIONING, 420 WOMEN (MEAN [SD] AGE AT BASELINE, 71.3 [3.2] YEARS) WHO SURVIVED TO AGE 90 YEARS WITHOUT INTACT MOBILITY AND COGNITIVE FUNCTIONING, AND 929 WOMEN (MEAN [SD] AGE AT BASELINE, 70.2 [3.4] YEARS) WHO DID NOT SURVIVE TO AGE 90 YEARS. WOMEN WHO SURVIVED TO AGE 90 YEARS WITH INTACT MOBILITY AND COGNITIVE FUNCTION WERE HEALTHIER AT BASELINE COMPARED WITH WOMEN WHO SURVIVED WITHOUT THOSE OUTCOMES OR WHO DID NOT SURVIVE TO AGE 90 YEARS (EG, 143 WOMEN [30.8%] VS 101 WOMEN [24.0%] AND 202 WOMEN [21.7%] WITH 0 CHRONIC CONDITIONS). THE ODDS OF SURVIVING TO AGE 90 YEARS WITH INTACT MOBILITY WERE LOWER FOR EVERY 1 SD INCREASE IN EAA COMPARED WITH THOSE WHO DID NOT SURVIVE TO AGE 90 YEARS AS MEASURED BY AGEACCELHORVATH (OR, 0.82; 95% CI, 0.69-0.96; P = .01), AGEACCELHANNUM (OR, 0.67; 95% CI, 0.56-0.80; P < .001), AGEACCELPHENO (OR, 0.60; 95% CI, 0.51-0.72; P < .001), AND AGEACCELGRIM (OR, 0.68; 95% CI, 0.55-0.84; P < .001). ORS WERE SIMILAR FOR WOMEN WHO SURVIVED TO AGE 90 YEARS WITH INTACT MOBILITY AND COGNITIVE FUNCTION (EG, AGEACCELHORVATH: OR PER 1 SD INCREASE IN EAA, 0.83; 95% CI, 0.71-0.98; P = .03) COMPARED WITH WOMEN WHO DID NOT SURVIVE TO AGE 90 YEARS. CONCLUSIONS AND RELEVANCE: THESE FINDINGS SUGGEST THAT EAA MAY BE A VALID BIOMARKER ASSOCIATED WITH HEALTHY LONGEVITY AMONG OLDER WOMEN AND MAY BE USED FOR RISK STRATIFICATION AND RISK ESTIMATION OF FUTURE FUNCTIONAL AND COGNITIVE AGING. OUTCOMES SUGGEST THAT FUTURE STUDIES MAY FOCUS ON THE POTENTIAL FOR PUBLIC HEALTH INTERVENTIONS TO COUNTERACT EAA AND ITS ASSOCIATION WITH POOR HEALTH OUTCOMES TO LOWER DISEASE BURDEN WHILE INCREASING LONGEVITY.	2022	

18  1956  39 EPIGENETIC AGE IN PERIPHERAL BLOOD AMONG CHILDREN, ADOLESCENT, AND ADULT SURVIVORS OF CHILDHOOD CANCER. IMPORTANCE: CERTAIN CANCER THERAPIES ARE RISK FACTORS FOR EPIGENETIC AGE ACCELERATION (EAA) AMONG SURVIVORS OF CHILDHOOD CANCER, AND EAA IS ASSOCIATED WITH CHRONIC HEALTH CONDITIONS (CHCS). HOWEVER, SMALL NUMBERS OF YOUNGER SURVIVORS (AGED <20 YEARS) PREVIOUSLY EVALUATED HAVE LIMITED THE ABILITY TO CALCULATE EAA AMONG THIS AGE GROUP. OBJECTIVE: TO EVALUATE THE CHANGE RATE OF EPIGENETIC AGE (EA) AND EAA IN YOUNGER COMPARED WITH OLDER SURVIVORS AND THE POSSIBLE ASSOCIATION OF EAA WITH EARLY-ONSET OBESITY (AGED <20 YEARS), SEVERITY/BURDEN OF CHCS, AND LATE MORTALITY (>5 YEARS FROM CANCER DIAGNOSIS). DESIGN, SETTING, AND PARTICIPANTS: STUDY PARTICIPANTS WERE FROM THE ST JUDE LIFETIME COHORT, INITIATED IN 2007 WITH ONGOING FOLLOW-UP. THE PRESENT STUDY WAS CONDUCTED FROM APRIL 17, 2022, TO MARCH 23, 2023. SURVIVORS IN THIS COHORT OF EUROPEAN ANCESTRY WITH DNA METHYLATION DATA WERE INCLUDED. CROSS-SECTIONAL ANNUAL CHANGES IN EA AND EAA WERE COMPARED ACROSS 5 DIFFERENT CHRONOLOGIC AGE GROUPS: AGE 0 TO 9 (CHILDREN), 10 TO 19 (ADOLESCENTS), 20 TO 34 (YOUNGER ADULTS), 35 TO 49 (MIDDLE-AGED ADULTS), AND GREATER THAN OR EQUAL TO 50 (OLDER ADULTS) YEARS. LOGISTIC REGRESSION EVALUATED THE ASSOCIATION BETWEEN EAA AND EARLY-ONSET OBESITY OR SEVERITY/BURDEN OF CHCS. COX PROPORTIONAL HAZARDS REGRESSION ASSESSED THE ASSOCIATION BETWEEN EAA AND LATE MORTALITY. MAIN OUTCOMES AND MEASURES: EARLY-ONSET OBESITY, SEVERITY/BURDEN OF CHCS (GRADED USING THE COMMON TERMINOLOGY CRITERIA FOR ADVERSE EVENTS (GRADE 1, MILD; 2, MODERATE; 3, SEVERE/DISABLING; 4, LIFE-THREATENING) AND WERE COMBINED INTO HIGH VS LOW SEVERITY/BURDEN BASED ON FREQUENCY AND GRADE), AND LATE MORTALITY WERE THE OUTCOMES BASED ON FOLLOW-UP UNTIL APRIL 2020. EXPANDED DNA METHYLATION PROFILING INCREASED THE NUMBER OF SURVIVORS YOUNGER THAN 20 YEARS (N = 690). EPIGENETIC AGE WAS CALCULATED PRIMARILY USING THE LEVINE CLOCK, AND EAA WAS DERIVED FROM LEAST SQUARES REGRESSION OF EA AGAINST CHRONOLOGIC AGE AND WAS STANDARDIZED TO A Z SCORE (LEVINE EEA). RESULTS: AMONG 2846 PARTICIPANTS (MEDIAN AGE, 30.3 [IQR, 9.3-41.5] YEARS; 53% MALES), THE CROSS-SECTIONAL ANNUAL CHANGE IN EA_LEVINE WAS HIGHER IN CHILDREN (1.63 YEARS) AND ADOLESCENTS (1.14 YEARS), AND THE ADJUSTED LEAST-SQUARES MEAN OF LEVINE EEA WAS LOWER IN CHILDREN (-0.22 YEARS) AND OLDER ADULTS (-1.70 YEARS). EACH 1-SD INCREASE IN LEVINE EEA WAS ASSOCIATED WITH INCREASED RISK OF DEVELOPING EARLY-ONSET OBESITY (ODDS RATIO [OR], 1.46; 95% CI, 1.19-1.78), HIGH SEVERITY/BURDEN OF CHCS (OR, 1.13; 95% CI, 1.03-1.24), AND LATE MORTALITY (HAZARD RATIO, 1.75; 95% CI, 1.35-2.26). CONCLUSIONS AND RELEVANCE: THE FINDINGS OF THIS STUDY SUGGEST THAT EAA MEASURED IN CHILDREN AND ADOLESCENT SURVIVORS OF CHILDHOOD CANCER IS ASSOCIATED WITH EARLY-ONSET OBESITY, SEVERITY/BURDEN OF ALL CHCS, AND LATE MORTALITY. EVALUATING EAA MAY HELP IDENTIFY SURVIVORS OF CHILDHOOD CANCER AT INCREASED RISK FOR EARLY-ONSET OBESITY, MORBIDITY IN GENERAL, AND MORTALITY.	2023	
                                                                                                                                                                                                                                      
19   339  28 ALTERATIONS IN HOMOCYSTEINE METABOLISM AMONG ALCOHOL DEPENDENT PATIENTS--CLINICAL, PATHOBIOCHEMICAL AND GENETIC ASPECTS. ADDICTION RESEARCH FOCUSING ON HOMOCYSTEINE METABOLISM AND ITS ASSOCIATION WITH ASPECTS OF ALCOHOL DEPENDENCE HAS REVEALED IMPORTANT FINDINGS. RECENT LITERATURE ON THIS TOPIC HAS BEEN TAKEN INTO ACCOUNT FOR THE REVIEW PROVIDED. METHYLENETETRAHYDROFOLATE REDUCTASE (MTHFR) IS A KEY ENZYME IN THE HOMOCYSTEINE METABOLISM. PLASMA HOMOCYSTEINE LEVELS ARE INFLUENCED BY THE SINGLE-NUCLEOTIDE POLYMORPHISM (SNP) MTHFR C677T. BESIDES GENETIC FACTORS, ENVIRONMENTAL FACTORS HAVE AN IMPACT ON HOMOCYSTEINE PLASMA LEVELS TOO. THUS, CHRONIC ALCOHOL INTAKE IS ASSOCIATED WITH ELEVATED HOMOCYSTEINE PLASMA CONCENTRATIONS. ELEVATION OF PLASMA HOMOCYSTEINE CONCENTRATION IS CONSIDERED AS A PREDICTOR FOR THE OCCURRENCE OF ALCOHOL WITHDRAWAL SEIZURES AND--AS HOMOCYSTEINE IS A CARDIOVASCULAR RISK FACTOR--MIGHT CONTRIBUTE TO THE HIGHER RISK FOR MYOCARDIAL INFARCTION AMONG ALCOHOL DEPENDENT PATIENTS. HOMOCYSTEINE ACTS AS AN N-METHYL-D-ASPARTATE (NMDA) RECEPTOR AGONIST AND HAS EXCITOTOXIC EFFECTS. FURTHERMORE, IT HAS BEEN DEMONSTRATED THAT HOMOCYSTEINE HAS NEUROTOXIC EFFECTS ESPECIALLY ON DOPAMINERGIC NEURONS. AS THE REWARDING EFFECTS OF ALCOHOL ARE MEDIATED BY THE DOPAMINERGIC SYSTEM, A HOMOCYSTEINE-DEPENDENT IMPAIRMENT OF THE REWARD SYSTEM POSSIBLY LEADS TO AN ALTERED DRINKING BEHAVIOUR ACCORDING TO THE DEFICIT HYPOTHESIS OF ADDICTION. HOMOCYSTEINE IS INVOLVED IN THE METABOLISM OF METHYL GROUPS AND DNA-METHYLATION PLAYS A ROLE IN REGULATION OF GENE EXPRESSION. THEREFORE IT HAS BEEN SUGGESTED THAT HOMOCYSTEINE IS AN IMPORTANT EPIGENETIC FACTOR. IT REMAINS TO BE DETERMINED WHETHER ALCOHOL DEPENDENT PATIENTS BENEFIT FROM HOMOCYSTEINE LOWERING STRATEGIES, E.G., VIA SUPPLEMENTATION OF FOLATE, VITAMIN B6 AND B12. IN THIS RESPECT IT IS NOT CLEAR YET, IF A SUPPLEMENTATION THERAPY CAN REDUCE THE RISK FOR THE OCCURRENCE OF ALCOHOL WITHDRAWAL SEIZURES.	2008	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
20   401  37 ANALYSIS OF ABERRANT METHYLATION ON PROMOTER SEQUENCES OF TUMOR SUPPRESSOR GENES AND TOTAL DNA IN SPUTUM SAMPLES: A PROMISING TOOL FOR EARLY DETECTION OF COPD AND LUNG CANCER IN SMOKERS. BACKGROUND: CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) IS A DISORDER ASSOCIATED TO CIGARETTE SMOKE AND LUNG CANCER (LC). SINCE EPIGENETIC CHANGES IN ONCOGENES AND TUMOR SUPPRESSOR GENES (TSGS) ARE CLEARLY IMPORTANT IN THE DEVELOPMENT OF LC. IN THIS STUDY, WE HYPOTHESIZE THAT TOBACCO SMOKERS ARE SUSCEPTIBLE FOR METHYLATION IN THE PROMOTER REGION OF TSGS IN AIRWAY EPITHELIAL CELLS WHEN COMPARED WITH NON-SMOKER SUBJECTS. THE PURPOSE OF THIS STUDY WAS TO INVESTIGATE THE USEFULNESS OF DETECTION OF GENES PROMOTER METHYLATION IN SPUTUM SPECIMENS, AS A COMPLEMENTARY TOOL TO IDENTIFY LC BIOMARKERS AMONG SMOKERS WITH EARLY COPD. METHODS: WE DETERMINED THE AMOUNT OF DNA IN INDUCED SPUTUM FROM PATIENTS WITH COPD (N = 23), LC (N = 26), AS WELL AS IN HEALTHY SUBJECTS (CTR) (N = 33), USING A COMMERCIAL KIT FOR DNA PURIFICATION, FOLLOWED BY ABSORBANCE MEASUREMENT AT 260 NM. THE FREQUENCY OF CDKN2A, CDH1 AND MGMT PROMOTER METHYLATION IN THE SAME GROUPS WAS DETERMINED BY METHYLATION-SPECIFIC POLYMERASE CHAIN REACTION (MSP). THE FISHER'S EXACT TEST WAS EMPLOYED TO COMPARE FREQUENCY OF RESULTS BETWEEN DIFFERENT GROUPS. RESULTS: DNA CONCENTRATION WAS 7.4 AND 5.8 TIMES HIGHER IN LC AND COPD COMPARED TO THE (CTR) (P < 0.0001), RESPECTIVELY. METHYLATION STATUS OF CDKN2A AND MGMT WAS SIGNIFICANTLY HIGHER IN COPD AND LC PATIENTS COMPARED WITH CTR GROUP (P < 0.0001). FREQUENCY OF CDH1 METHYLATION ONLY SHOWED A STATISTICALLY SIGNIFICANT DIFFERENCE BETWEEN LC PATIENTS AND CTR GROUP (P < 0.05). CONCLUSIONS: WE PROVIDE EVIDENCE THAT ABERRANT METHYLATION OF TSGS IN SAMPLES OF INDUCED SPUTUM IS A USEFUL TOOL FOR EARLY DIAGNOSTIC OF LUNG DISEASES (LC AND COPD) IN SMOKER SUBJECTS. VIRTUAL SLIDES: THE ABSTRACT MUST FINISH WITH THE FOLLOWING TEXT: VIRTUAL SLIDES THE VIRTUAL SLIDE(S) FOR THIS ARTICLE CAN BE FOUND HERE: HTTP://WWW.DIAGNOSTICPATHOLOGY.DIAGNOMX.EU/VS/1127865005664160.	2012