1 4835 231 ON THE RELATIONSHIP BETWEEN THEORETICAL PRESUMPTIONS ASBESTOS GENOTOXICITY AND THE PRACTICAL MONITORING OF EXPOSED WORKERS. FROM THE GENOTOXIC VIEWPOINT, THERE EXISTS A SUFFICIENT EVIDENCE FOR ASBESTOS CARCINOGENICITY TO HUMAN POPULATION AND ANIMALS. ASBESTOS IS A SOLID CANCER PROMOTER (COCARCINOGEN) OF NON-MUTAGENIC CHARACTER HAVING EPIGENETIC EFFECTS (15, 16). NO DATA HAVE BEEN PUBLISHED ON ITS MUTAGENIC ACTIVITY IN "IN VIVO" CONDITIONS IN MAN. THE ONLY RESULTS ARE THOSE OF OUR PILOT STUDY CARRIED OUT IN THE PERIOD OF 1981-1983, WHICH CAST DOUBTS ON THE OFFICIAL VIEW OF NON-MUTAGENIC CHARACTER OF ASBESTOS--AT LEAST UNDER OCCUPATIONAL CONDITIONS OF ITS PROCESSING (34, 36, 37). THE STUDY PRESENTED HERE REPRESENTS TEN YEARS' EFFORTS MADE IN THE BIOLOGICAL (CYTOGENETIC) MONITORING OF PERSONS OCCUPATIONALLY EXPOSED TO ASBESTOS IN A FACTORY FOR ITS PROCESSING (OCCUPATIONAL RISK). SIMULTANEOUSLY, A PRELIMINARY ANSWER IS GIVEN TO THE QUESTION WHETHER THE OSINEK FACTORY (SITUATED IN A HOUSING AREA) IS OR IS NOT DANGEROUS FOR INHABITANTS OF THE TOWN OF KOSTELEC NAD ORLICI, NAMELY FOR THEIR GENETIC APPARATUS (ENVIRONMENTAL RISK). USING THE METHOD OF CHROMOSOME ABERRATIONS ANALYSIS IN PERIPHERAL BLOOD LYMPHOCYTES, A TOTAL OF 431 SUBJECTS (245 MALES AND 186 FEMALES) WERE EXAMINED IN THE PERIOD OF 1981 TO 1988. OF THESE, 111 PERSONS WERE FROM CONTROL WORKPLACES (FROM OSINEK OR--STARTING FROM 1984--FROM OTHER PLANTS IN KOSTELEC NAD ORLICI; IN ADDITION TO THAT 14 PENSIONERS WITHOUT ANY OCCUPATIONAL EXPOSURE WERE EXAMINED). THE AVERAGE AGE OF WORKERS EXPOSED TO ASBESTOS RISK WAS 42.7 YEARS, IN THE CONTROLS IT WAS 43.9 YEARS, IN PENSIONERS EXPOSED TO ASBESTOS EARLIER 63.5 YEARS AND IN THOSE NEVER EXPOSED TO ASBESTOS 66.5 YEARS. THE AVERAGE NUMBER OF YEARS SPENT AT OSINEK FACTORY AMOUNTED TO 21.5 YEARS. ABOUT ONE THIRD OF EMPLOYEES WERE FOUND TO SUFFER FROM ALLERGIES (FIRST OF ALL THOSE OF AIR PASSAGES) AND ONE SIXTH FROM CHRONIC AILMENTS OF THE UPPER AIR PASSAGES (STAPHYLOCOCCUS AUREUS, HAEMOPHILUS INFLUENZAE AND STREPTOCOCCUS BETA-HAEMOLYTICUS WERE DIAGNOSED MOST FREQUENTLY). A THIRD PART OF WORKERS FROM HIGH-RISK WORKSHOPS ARE SMOKERS, ONLY A FOURTH OF THE CONTROLS. ABOUT 40% OF WORKERS REGULARLY CONSUME ALCOHOLIC DRINKS. THE AVERAGE MORBIDITY RATE AT OSINEK IN 1981 TO 1988 WAS 6.3% (IN WORKERS AS HIGH AS 9%), WHICH IS ABOUT 2% HIGHER AS COMPARED WITH MEAN VALUES OBTAINED IN THE DISTRICT OF RYCHNOV NAD KNEZNOU AND EAST-BOHEMIAN REGION. WITHIN THE NINE-YEAR PERIOD (1981-1989), 21 OCCUPATIONAL DISEASES WERE DIAGNOSED, WHILE IN THE PREVIOUS 24 YEARS THERE WERE 24 CASES OF AN OCCUPATIONAL DISEASE. EARLIER THEY WERE MAINLY ASBESTOSES (87%), IN THE LAST PERIOD MAINLY CANCER DISEASES COINCIDING WITH ASBESTOSIS (81%).(ABSTRACT TRUNCATED AT 400 WORDS)	1992	

2 1355  32 DEVELOPMENT AND VALIDATION OF A SIMPLE GENERAL POPULATION LUNG CANCER RISK MODEL INCLUDING AHRR-METHYLATION. INTRODUCTION: SCREENING REDUCES LUNG CANCER MORTALITY OF HIGH-RISK POPULATIONS. CURRENTLY PROPOSED SCREENING ELIGIBILITY CRITERIA ONLY IDENTIFY HALF OF THOSE INDIVIDUALS, WHO LATER DEVELOP LUNG CANCER. THIS STUDY AIMED TO DEVELOP AND VALIDATE A SENSITIVE AND SIMPLE MODEL FOR PREDICTING 10-YEAR LUNG CANCER RISK. METHODS: USING THE 1991-94 EXAMINATION OF THE COPENHAGEN CITY HEART STUDY IN DENMARK, 6,820 FORMER OR CURRENT SMOKERS FROM THE GENERAL POPULATION WERE FOLLOWED FOR LUNG CANCER WITHIN 10 YEARS AFTER EXAMINATION. LOGISTIC REGRESSION OF BASELINE VARIABLES (AGE, SEX, EDUCATION, CHRONIC OBSTRUCTIVE PULMONARY DISEASE, FAMILY HISTORY OF LUNG CANCER, SMOKING STATUS AND CUMULATIVE SMOKING, SECONDHAND SMOKING, OCCUPATIONAL EXPOSURES TO DUST AND FUME, BODY MASS INDEX, LUNG FUNCTION, PLASMA C-REACTIVE PROTEIN, AND AHRR(CG05575921) METHYLATION) IDENTIFIED THE BEST PREDICTIVE MODEL. THE MODEL WAS VALIDATED AMONG 3,740 FORMER OR CURRENT SMOKERS FROM THE 2001-03 EXAMINATION, ALSO FOLLOWED FOR 10 YEARS. A SIMPLE RISK CHART WAS DEVELOPED WITH POISSON REGRESSION. RESULTS: AGE, SEX, EDUCATION, SMOKING STATUS, CUMULATIVE SMOKING, AND AHRR(CG05575921) METHYLATION IDENTIFIED 65 OF 88 INDIVIDUALS WHO DEVELOPED LUNG CANCER IN THE VALIDATION COHORT. THE HIGHEST RISK GROUP, CONSISTING OF LESS EDUCATED MEN AGED >65 WITH CURRENT SMOKING STATUS AND CUMULATIVE SMOKING >20 PACK-YEARS, HAD ABSOLUTE 10-YEAR RISKS VARYING FROM 4% TO 16% BY AHRR(CG05575921) METHYLATION. CONCLUSION: A SIMPLE RISK CHART INCLUDING AGE, SEX, EDUCATION, SMOKING STATUS, CUMULATIVE SMOKING, AND AHRR(CG05575921) METHYLATION, IDENTIFIES INDIVIDUALS WITH 10-YEAR LUNG CANCER RISK FROM BELOW 1% TO 16%. INCLUDING AHRR(CG05575921) METHYLATION IN THE ELIGIBILITY CRITERIA FOR SCREENING IDENTIFIES SMOKERS WHO WOULD BENEFIT THE MOST FROM SCREENING.	2023	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
3 1847  41 EFFECTS OF VARIOUS ENVIRONMENTS ON EPIGENETIC SETTINGS AND CHROMOSOMAL DAMAGE. AIR POLLUTION IS A DOMINANT ENVIRONMENTAL EXPOSURE FACTOR WITH SIGNIFICANT HEALTH CONSEQUENCES. UNEXPECTEDLY, RESEARCH IN A HEAVILY POLLUTED REGION OF THE CZECH REPUBLIC, WITH TRADITIONAL HEAVY INDUSTRY, REVEALED REPEATEDLY THE LOWEST FREQUENCY OF MICRONUCLEI IN THE SEASON WITH THE HIGHEST CONCENTRATIONS OF AIR POLLUTANTS INCLUDING CARCINOGENIC BENZO[A]PYRENE (B[A]P). MOLECULAR FINDINGS HAVE BEEN COLLECTED FOR MORE THAN 10 YEARS FROM VARIOUS LOCATIONS OF THE CZECH REPUBLIC, WITH DIFFERING QUALITY OF AMBIENT AIR. PRELIMINARY CONCLUSIONS HAVE SUGGESTED ADAPTATION OF THE POPULATION FROM THE POLLUTED LOCALITY (OSTRAVA, MORAVIAN-SILESIAN REGION (MSR)) TO CHRONIC AIR POLLUTION EXPOSURE. IN THIS STUDY WE UTILIZE THE PREVIOUS FINDINGS AND, FOR THE FIRST TIME, INVESTIGATE MICRONUCLEI (MN) FREQUENCY BY TYPE: (I) CENTROMERE POSITIVE (CEN+) MN, REPRESENTING CHROMOSOMAL LOSSES, AND (II) CENTROMERE NEGATIVE (CEN-) MN REPRESENTING CHROMOSOMAL BREAKS. AS PREVIOUS RESULTS INDICATED DIFFERENCES BETWEEN POPULATIONS IN THE EXPRESSION OF XRCC5, A GENE INVOLVED IN THE NON-HOMOLOGOUS END-JOINING (NHEJ) REPAIR PATHWAY, POSSIBLE VARIATIONS IN EPIGENETIC SETTINGS IN THIS GENE WERE ALSO INVESTIGATED. THIS NEW RESEARCH WAS CONDUCTED IN TWO SEASONS IN THE GROUPS FROM TWO LOCALITIES WITH DIFFERENT AIR QUALITY LEVELS (OSTRAVA (OS) AND PRAGUE (PG)). THE OBTAINED NEW RESULTS SHOW SIGNIFICANTLY LOWER FREQUENCIES OF CHROMOSOMAL BREAKS IN THE OS SUBJECTS, RELATED TO THE HIGHEST AIR POLLUTION LEVELS (P < 0.001). IN CONTRAST, CHROMOSOMAL LOSSES WERE COMPARABLE BETWEEN BOTH GROUPS. IN ADDITION, SIGNIFICANTLY LOWER DNA METHYLATION WAS FOUND IN 14.3% OF THE ANALYZED CPG LOCI OF XRCC5 IN THE POPULATION FROM OS. IN CONCLUSION, THE EPIGENETIC ADAPTATION (HYPOMETHYLATION) IN XRCC5 INVOLVED IN THE NHEJ REPAIR PATHWAY IN THE POPULATION FROM THE POLLUTED REGION, WAS SUGGESTED AS A REASON FOR THE REDUCED LEVEL OF CHROMOSOMAL BREAKS. FURTHER RESEARCH IS NEEDED TO EXPLORE THE ADDITIONAL MECHANISMS, INCLUDING GENETIC ADAPTATION.	2023	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
4 4602  27 NECESSITY OF EPIGENETIC EPIDEMIOLOGY STUDIES ON THE CARCINOGENESIS OF LUNG CANCER IN NEVER SMOKERS. BASED ON EPIDEMIOLOGICAL AND GENOMIC CHARACTERISTICS, LUNG CANCER IN NEVER SMOKERS (LCNS) IS A DIFFERENT DISEASE FROM LUNG CANCER IN SMOKERS. BASED ON CURRENT RESEARCH, THE MAIN RISK FACTOR FOR LCNS MAY BE AIR POLLUTION. A RECENT CASE-CONTROL STUDY IN KOREANS REPORTED THAT NITROGEN DIOXIDE (NO2) MAY BE A RISK FACTOR FOR LCNS. ADDITIONALLY, A COHORT STUDY SHOWED THAT EXPOSURE TO NO2 WAS ASSOCIATED WITH SIGNIFICANT HYPOMETHYLATION. THUS, EPIGENETIC EPIDEMIOLOGY STUDIES ARE NEEDED IN THE NEAR FUTURE TO EVALUATE THE CARCINOGENESIS OF LCNS ACCORDING TO CHRONIC EXPOSURE TO AIR POLLUTION AND/OR VIRAL INFECTIONS.	2018	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
5 6911  30 [TWO GERMAN BIRTH COHORTS: GINIPLUS AND LISAPLUS]. NUMEROUS CHRONIC DISEASES IN CHILDHOOD AND ADULTHOOD HAVE THEIR ORIGINS IN PERINATAL LIFE AND ARE POTENTIALLY INFLUENCED BY TRANS-GENERATIONAL EPIGENETIC PROCESSES. THEREFORE, PROSPECTIVE BIRTH COHORTS CAN SUBSTANTIALLY CONTRIBUTE TO OUR KNOWLEDGE ABOUT THE ETIOLOGY OF DISEASES INCLUDING MODIFIABLE RISK FACTORS. THE TWO POPULATION-BASED GERMAN BIRTH COHORTS GINIPLUS AND LISAPLUS AIM TO DESCRIBE THE NATURAL COURSE OF CHRONIC DISEASES AND INTERMEDIATE PHENOTYPES IN CHILDHOOD AND ITS DETERMINANTS, AND TO IDENTIFY POTENTIAL GENETIC EFFECT MODIFICATIONS. IN THE MID-1990S, 5,991 (GINIPLUS) AND 3,097 (LISAPLUS) HEALTHY, TERM NEWBORNS WERE RECRUITED FOR LONG-TERM FOLLOW-UP IN FOUR REGIONS OF GERMANY. THE FOLLOW-UP RATE FOR THE FIRST 10 YEARS WAS ABOUT 55%. WE ANALYZED THE GROWTH AND DEVELOPMENT OF OVERWEIGHT, INFECTIONS AND ALLERGIC DISEASES, MENTAL AND ORAL HEALTH, METABOLIC AND INFLAMMATORY PARAMETERS AND THE ROLE OF POTENTIAL RISK FACTORS INCLUDING GENETICS. THE RESULTS OF THESE TWO BIRTH COHORTS SUBSTANTIALLY CONTRIBUTE TO THE CURRENT KNOWLEDGE ABOUT THE NATURAL COURSE OF THESE HEALTH PARAMETERS. THESE DATA WERE INCLUDED IN MANY INTERNATIONAL PROJECTS AND CONSORTIA FOR PURPOSES OF INTERNATIONAL COMPARISONS OF PREVALENCE AND CONSISTENCY OF FINDINGS, AND TO INCREASE THE POWER OF THE ANALYSES.	2012	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
6 1529  32 DNA METHYLATION CHANGES IN WHOLE BLOOD AND CD16+ NEUTROPHILS IN RESPONSE TO CHRONIC FOLIC ACID SUPPLEMENTATION IN WOMEN OF CHILDBEARING AGE. FOLATE, A WATER-SOLUBLE VITAMIN, IS A KEY SOURCE OF ONE-CARBON GROUPS FOR DNA METHYLATION, BUT STUDIES OF THE DNA METHYLATION RESPONSE TO SUPPLEMENTAL FOLIC ACID YIELD INCONSISTENT RESULTS. THESE STUDIES ARE COMMONLY CONDUCTED USING WHOLE BLOOD, WHICH CONTAINS A MIXED POPULATION OF WHITE BLOOD CELLS THAT HAVE BEEN SHOWN TO CONFOUND RESULTS. THE OBJECTIVE OF THIS STUDY WAS TO DETERMINE IF CD16+ NEUTROPHILS MAY PROVIDE MORE SPECIFIC DATA THAN WHOLE BLOOD FOR IDENTIFYING DNA METHYLATION RESPONSE TO CHRONIC FOLIC ACID SUPPLEMENTATION. THE STUDY WAS PERFORMED IN NORMAL WEIGHT (BMI 18.5 - 24.9 KG/M2) WOMEN (18 - 35 Y; N = 12), WITH BLOOD SAMPLES TAKEN BEFORE AND AFTER 8 WEEKS OF FOLIC ACID SUPPLEMENTATION AT 800 MUG/DAY. DNA METHYLATION PATTERNS FROM WHOLE BLOOD AND ISOLATED CD16+ NEUTROPHILS WERE MEASURED ACROSS >485,000 CPG SITES THROUGHOUT THE GENOME USING THE INFINIUM HUMANMETHYLATION450 BEADCHIP. OVER THE COURSE OF THE 8-WEEK SUPPLEMENTATION, 6746 AND 7513 CPG SITES CHANGED (P < 0.05) IN WHOLE BLOOD AND CD16+ NEUTROPHILS, RESPECTIVELY. DNA METHYLATION DECREASED IN 68.4% (WHOLE BLOOD) AND 71.8% (CD16+ NEUTROPHILS) OF THESE SITES. THERE WERE ONLY 182 CPG SITES THAT CHANGED IN BOTH THE WHOLE BLOOD AND CD16+ NEUTROPHILS, 139 OF WHICH CHANGED IN THE SAME DIRECTION. THESE RESULTS SUGGEST THAT THE GENOME-WIDE DNA METHYLATION RESPONSE TO CHRONIC FOLIC ACID SUPPLEMENTATION IS DIFFERENT BETWEEN WHOLE BLOOD AND CD16+ NEUTROPHILS AND THAT A SINGLE WHITE BLOOD CELL TYPE MAY FUNCTION AS A MORE SPECIFIC EPIGENETIC REPORTER OF FOLATE STATUS THAN WHOLE BLOOD.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
7 3162  46 GREATER STRESS AND TRAUMA MEDIATE RACE-RELATED DIFFERENCES IN EPIGENETIC AGE BETWEEN BLACK AND WHITE YOUNG ADULTS IN A COMMUNITY SAMPLE. BLACK AMERICANS SUFFER LOWER LIFE EXPECTANCY AND SHOW SIGNS OF ACCELERATED AGING COMPARED TO OTHER AMERICANS. WHILE PREVIOUS STUDIES OBSERVE THESE DIFFERENCES IN CHILDREN AND POPULATIONS WITH CHRONIC ILLNESS, WHETHER THESE PATHOLOGIC PROCESSES EXIST OR HOW THESE PATHOLOGIC PROCESSES PROGRESS HAS YET TO BE EXPLORED PRIOR TO THE ONSET OF SIGNIFICANT CHRONIC ILLNESS, WITHIN A YOUNG ADULT POPULATION. THEREFORE, WE INVESTIGATED RACE-RELATED DIFFERENCES IN EPIGENETIC AGE IN A CROSS-SECTIONAL SAMPLE OF YOUNG PUTATIVELY HEALTHY ADULTS AND ASSESSED WHETHER LIFETIME STRESS AND/OR TRAUMA MEDIATE THOSE DIFFERENCES. BIOLOGICAL AND PSYCHOLOGICAL DATA WERE COLLECTED FROM SELF-REPORTED HEALTHY ADULT VOLUNTEERS WITHIN THE LOCAL NEW HAVEN AREA (399 VOLUNTEERS, 19.8% BLACK, MEAN AGE: 29.28). STRESS AND TRAUMA DATA WAS COLLECTED USING THE CUMULATIVE ADVERSITY INVENTORY (CAI) INTERVIEW, WHICH ASSESSED SPECIFIC TYPES OF STRESSORS, INCLUDING MAJOR LIFE EVENTS, TRAUMATIC EVENTS, WORK, FINANCIAL, RELATIONSHIP AND CHRONIC STRESSORS CUMULATIVELY OVER TIME. GRIMAGE ACCELERATION (GAA), DETERMINED FROM WHOLE BLOOD COLLECTED FROM PARTICIPANTS, MEASURED EPIGENETIC AGE. IN ORDER TO UNDERSTAND THE IMPACT OF STRESS AND TRAUMA ON GAA, EXPLORATORY MEDIATION ANALYSES WERE THEN USED. WE FOUND CUMULATIVE STRESSORS ACROSS ALL TYPES OF EVENTS (MEAN DIFFERENCE OF 6.9 P = 2.14E-4) AND GAA (BETA = 2.29 YEARS [1.57-3.01, P = 9.70E-10] FOR RACE, PARTIAL ETA(2) = 0.091, MODEL ADJUSTED R(2) = 0.242) WERE SIGNIFICANTLY GREATER IN BLACK COMPARED TO WHITE PARTICIPANTS. CRITICALLY, CAI TOTAL SCORE (PROPORTION MEDIATED: 0.185 [0.073-0.34, P = 6E-4]) SIGNIFICANTLY MEDIATED THE RELATIONSHIP BETWEEN RACE AND GAA. FURTHER ANALYSIS ATTRIBUTED THIS DIFFERENCE TO MORE TRAUMATIC EVENTS, PARTICULARLY ASSAULTIVE TRAUMAS AND DEATH OF LOVED ONES. OUR RESULTS SUGGEST THAT, PRIOR TO DEVELOPMENT OF SIGNIFICANT CHRONIC DISEASE, BLACK INDIVIDUALS HAVE INCREASED EPIGENETIC AGE COMPARED TO WHITE PARTICIPANTS AND THAT INCREASED CUMULATIVE STRESS AND TRAUMATIC EVENTS MAY CONTRIBUTE SIGNIFICANTLY TO THIS EPIGENETIC AGING DIFFERENCE.	2023	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
8  489  40 ASSESSING POTENTIAL MECHANISMS OF ARSENIC-INDUCED SKIN LESIONS AND CANCERS: HUMAN AND IN VITRO EVIDENCE. ENVIRONMENTAL EXPOSURE TO ARSENIC IS A MAJOR PUBLIC HEALTH CHALLENGE WORLDWIDE. IN DETAILING THE HALLMARK SIGNS OF CHRONIC ARSENIC EXPOSURE, PREVIOUS STUDIES HAVE SHOWN THAT EPIGENETIC AND IMMUNE DYSFUNCTION ARE ASSOCIATED WITH ARSENIC-INDUCED SKIN LESIONS; HOWEVER, KNOWLEDGE REGARDING INTERACTIONS BETWEEN THE MECHANISMS LISTED ABOVE IS LIMITED. IN THIS STUDY, A TOTAL OF 106 SKIN SAMPLES WERE COLLECTED OVER THE PAST 20 YEARS. BASED ON THE PRESENCE OR ABSENCE OF HIGH ARSENIC EXPOSURE, THE PARTICIPANTS WERE DIVIDED INTO ARSENIC EXPOSURE (72) AND REFERENCE (34) GROUPS. ADDITIONALLY, THE ARSENIC EXPOSURE GROUP WAS FURTHER DIVIDED INTO THE NON-CANCER GROUP (31, INCLUDING SKIN HYPERPIGMENTATION AND HYPERKERATOSIS) AND THE SKIN CANCER GROUP (41, INCLUDING BOWEN'S DISEASE, BASAL CELL CARCINOMA AND SQUAMOUS CELL CARCINOMA) ACCORDING TO A SKIN HISTOPATHOLOGICAL EXAMINATION. FIRST, THE ASSOCIATIONS AMONG MIR-155, NF-AT1 WITH IMMUNOLOGICAL DYSFUNCTION AND ARSENIC-INDUCED SKIN LESIONS AND CARCINOGENESIS WERE CONFIRMED USING THESE SKIN SAMPLES. IN THE ARSENIC-EXPOSED GROUP, MIR-155-5P, KERATIN 1(KRT1), KERATIN 10 (KRT10), AND KERATIN 6C (KRT6C) WERE SIGNIFICANTLY INCREASED IN THE SKIN (P < 0.05), WHILE NF-AT1, INTERLEUKIN-2 (IL-2), AND INTERFERON-GAMMA (IFN-GAMMA) WERE SIGNIFICANTLY DECREASED (P < 0.05). CLEAR CORRELATIONS WERE OBSERVED AMONG THESE FACTORS (P < 0.05). IN IMMORTALIZED HUMAN KERATINOCYTES, SILENCING AND OVEREXPRESSION OF NF-AT1 COULD ALTER THE EXPRESSION AND SECRETION OF IMMUNOLOGICAL DYSFUNCTION INDICATORS (IL-2 AND IFN-GAMMA) THAT ARE INDUCED BY ARSENIC EXPOSURE (P < 0.05); HOWEVER, MIR-155-5P LEVELS DID NOT CHANGE SIGNIFICANTLY (P > 0.05). THE MIR-155-5P MIMIC AND INHIBITOR COULD REGULATE THE NF-AT1-MEDIATED IMMUNOLOGICAL DYSFUNCTION CAUSED BY ARSENIC (P < 0.05). OUR STUDY PROVIDES SOME LIMITED EVIDENCE THAT MIR-155-5P REGULATES THE NF-AT1-MEDIATED IMMUNOLOGICAL DYSFUNCTION THAT IS INVOLVED IN THE PATHOGENESIS AND CARCINOGENESIS OF ARSENIC. THE SECOND MAJOR FINDING WAS THAT KRT1 AND KRT10 ARE MARKERS OF HYPERKERATOSIS CAUSED BY ARSENIC, AND KRT6C IS A POTENTIAL BIOMARKER THAT CAN REFLECT ARSENIC CARCINOGENESIS.	2020	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
9 1782  43 EFFECT OF A 3-WEEK MULTIDISCIPLINARY BODY WEIGHT REDUCTION PROGRAM ON THE EPIGENETIC AGE ACCELERATION IN OBESE ADULTS. OBESITY AND AGING SHARE COMMON MOLECULAR AND CELLULAR MECHANISMS UNDERLYING THE PATHOPHYSIOLOGY OF CARDIOVASCULAR DISEASES (CVD), WHICH OCCUR FREQUENTLY IN BOTH CONDITIONS. DNA METHYLATION (DNAM) AGE, A BIOMARKER OF THE EPIGENETIC CLOCK, HAS BEEN PROPOSED AS A MORE ACCURATE PREDICTOR OF BIOLOGICAL AGING THAN CHRONOLOGICAL AGE. A POSITIVE DIFFERENCE BETWEEN AN INDIVIDUAL'S CHRONOLOGICAL AGE AND DNAM AGE IS REFERRED TO AS EPIGENETIC AGE ACCELERATION. THE OBJECTIVE OF THE PRESENT STUDY WAS TO EVALUATE THE EFFECTS OF A 3-WEEK IN-HOSPITAL BODY WEIGHT REDUCTION PROGRAM (BWRP) ON THE EPIGENETIC AGE ACCELERATION, AS WELL AS ON OTHER CARDIOMETABOLIC OUTCOMES, IN A COHORT OF 72 OBESE ADULTS (F/M: 43/29; (CHRONOLOGICAL) AGE: 51.5 +/- 14.5 YRS; BMI: 46.5 +/- 6.3 KG/M2). AT THE END OF THE BWRP, WHEN CONSIDERING THE ENTIRE POPULATION, BMI DECREASED, AND CHANGES IN BODY COMPOSITION WERE OBSERVED. THE BWRP ALSO PRODUCED BENEFICIAL METABOLIC EFFECTS AS DEMONSTRATED BY DECREASES IN GLUCOSE, INSULIN, HOMA-IR, TOTAL CHOLESTEROL, AND LDL CHOLESTEROL. A POST-BWRP IMPROVEMENT IN CARDIOVASCULAR FUNCTION WAS ALSO EVIDENT (I.E., DECREASES IN SYSTOLIC AND DIASTOLIC BLOOD PRESSURES AND HEART RATE). THE BWRP REDUCED SOME MARKERS OF SYSTEMIC INFLAMMATION, PARTICULARLY C-REACTIVE PROTEIN (CRP). FINALLY, VASCULAR AGE (VA) AND FRAMINGHAM RISK SCORE (FRS) WERE REDUCED AFTER THE BWRP. WHEN CONSIDERING THE ENTIRE POPULATION, DNAM AGE AND EPIGENETIC AGE ACCELERATION DID NOT DIFFER AFTER THE BWRP. HOWEVER, WHEN SUBDIVIDING THE POPULATION INTO TWO GROUPS BASED ON EACH SUBJECT'S EPIGENETIC AGE ACCELERATION (I.E., </=0 YRS OR >0 YRS), THE BWRP REDUCED THE EPIGENETIC AGE ACCELERATION ONLY IN OBESE SUBJECTS WITH A VALUE > 0 YRS (THUS BIOLOGICALLY OLDER THAN EXPECTED). AMONG ALL THE SINGLE DEMOGRAPHIC, LIFESTYLE, BIOCHEMICAL, AND CLINICAL CHARACTERISTICS INVESTIGATED, ONLY SOME MARKERS OF SYSTEMIC INFLAMMATION, SUCH AS CRP, WERE ASSOCIATED WITH THE EPIGENETIC AGE ACCELERATION. MOREOVER, CHRONOLOGICAL AGE WAS CORRELATED WITH DNAM AGE AND VA; FINALLY, THERE WAS A CORRELATION BETWEEN DNAM AGE AND VA. IN CONCLUSION, A 3-WEEK BWRP IS CAPABLE OF REDUCING THE EPIGENETIC AGE ACCELERATION IN OBESE ADULTS, BEING THE BWRP-INDUCED REJUVENATION EVIDENT IN SUBJECTS WITH AN EPIGENETIC AGE ACCELERATION > 0 YRS. BASED ON THE BWRP-INDUCED DECREASE IN CRP LEVELS, CHRONIC SYSTEMIC INFLAMMATION SEEMS TO PLAY A ROLE IN MEDIATING OBESITY-RELATED EPIGENETIC REMODELING AND BIOLOGICAL AGING. THUS, DUE TO THE STRONG ASSOCIATION OF CVD RISK WITH THE EPIGENETIC CLOCK AND MORBIDITY/MORTALITY, ANY EFFORT SHOULD BE MADE TO REDUCE THE LOW-GRADE CHRONIC INFLAMMATORY STATE IN OBESITY.	2022	
     
10 2967  35 GENETIC AND EPIGENETIC REGULATION OF CATECHOL-O-METHYLTRANSFERASE IN RELATION TO INFLAMMATION IN CHRONIC FATIGUE SYNDROME AND FIBROMYALGIA. BACKGROUND: CATECHOL-O-METHYLTRANSFERASE (COMT) HAS BEEN SHOWN TO INFLUENCE CLINICAL PAIN, DESCENDING MODULATION, AND EXERCISE-INDUCED SYMPTOM WORSENING. COMT REGULATES NOCICEPTIVE PROCESSING AND INFLAMMATION, KEY PATHOPHYSIOLOGICAL FEATURES OF CHRONIC FATIGUE SYNDROME AND FIBROMYALGIA (CFS/FM). WE AIMED TO DETERMINE THE INTERACTIONS BETWEEN GENETIC AND EPIGENETIC MECHANISMS REGULATING COMT AND ITS INFLUENCE ON INFLAMMATORY MARKERS AND SYMPTOMS IN PATIENTS WITH CFS/FM. METHODS: A CASE-CONTROL STUDY WITH REPEATED-MEASURES DESIGN WAS USED TO REDUCE THE CHANCE OF FALSE POSITIVE AND INCREASE THE POWER OF OUR FINDINGS. FIFTY-FOUR PARTICIPANTS (28 PATIENTS WITH CFS/FM AND 26 CONTROLS) WERE ASSESSED TWICE WITHIN 4 DAYS. THE ASSESSMENT INCLUDED CLINICAL QUESTIONNAIRES, NEUROPHYSIOLOGICAL ASSESSMENT (PAIN THRESHOLDS, TEMPORAL SUMMATION, AND CONDITIONED PAIN MODULATION), AND BLOOD WITHDRAWAL IN ORDER TO ASSESS RS4818, RS4633, AND RS4680 COMT POLYMORPHISMS AND PERFORM HAPLOTYPE ESTIMATION, DNA METHYLATION IN THE COMT GENE (BOTH MB-COMT AND S-COMT PROMOTERS), AND CYTOKINE EXPRESSION (TNF-ALPHA, IFN-GAMMA, IL-6, AND TGF-BETA). RESULTS: COMT HAPLOTYPES WERE ASSOCIATED WITH DNA METHYLATION IN THE S-COMT PROMOTER, TGF-BETA EXPRESSION, AND SYMPTOMS. HOWEVER, THIS WAS NOT SPECIFIC FOR ONE CONDITION. SIGNIFICANT BETWEEN-GROUP DIFFERENCES WERE FOUND FOR INCREASED DNA METHYLATION IN THE MB-COMT PROMOTER AND DECREASED IFN-GAMMA EXPRESSION IN PATIENTS. DISCUSSION: OUR RESULTS ARE CONSISTENT WITH BASIC AND CLINICAL RESEARCH, PROVIDING INTERESTING INSIGHTS INTO GENETIC-EPIGENETIC REGULATORY MECHANISMS. MB-COMT DNA METHYLATION MIGHT BE AN INDEPENDENT FACTOR CONTRIBUTING TO THE PATHOPHYSIOLOGY OF CFS/FM. FURTHER RESEARCH ON DNA METHYLATION IN COMPLEX CONDITIONS SUCH AS CFS/FM IS WARRANTED. WE RECOMMEND FUTURE RESEARCH TO EMPLOY A REPEATED-MEASURE DESIGN TO CONTROL FOR BIOMARKERS VARIABILITY AND WITHIN-SUBJECT CHANGES.	2022	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
11 1138  32 COMPUTATIONAL METHODS FOR DETECTION OF DIFFERENTIALLY METHYLATED REGIONS USING KERNEL DISTANCE AND SCAN STATISTICS. MOTIVATION: RESEARCHERS IN GENOMICS ARE INCREASINGLY INTERESTED IN EPIGENETIC FACTORS SUCH AS DNA METHYLATION BECAUSE THEY PLAY AN IMPORTANT ROLE IN REGULATING GENE EXPRESSION WITHOUT CHANGES IN THE SEQUENCE OF DNA. ABNORMAL DNA METHYLATION IS ASSOCIATED WITH MANY HUMAN DISEASES. RESULTS: WE PROPOSE TWO DIFFERENT APPROACHES TO TEST FOR DIFFERENTIALLY METHYLATED REGIONS (DMRS) ASSOCIATED WITH COMPLEX TRAITS, WHILE ACCOUNTING FOR CORRELATIONS AMONG CPG SITES IN THE DMRS. THE FIRST APPROACH IS A NONPARAMETRIC METHOD USING A KERNEL DISTANCE STATISTIC AND THE SECOND ONE IS A LIKELIHOOD-BASED METHOD USING A BINOMIAL SPATIAL SCAN STATISTIC. THE KERNEL DISTANCE METHOD USES THE KERNEL FUNCTION, WHILE THE BINOMIAL SCAN STATISTIC APPROACH USES A MIXED-EFFECTS MODEL TO INCORPORATE CORRELATIONS AMONG CPG SITES. EXTENSIVE SIMULATIONS SHOW THAT BOTH APPROACHES HAVE EXCELLENT CONTROL OF TYPE I ERROR, AND BOTH HAVE REASONABLE STATISTICAL POWER. THE BINOMIAL SCAN STATISTIC APPROACH APPEARS TO HAVE HIGHER POWER, WHILE THE KERNEL DISTANCE METHOD IS COMPUTATIONALLY FASTER. THE PROPOSED METHODS ARE DEMONSTRATED USING DATA FROM A CHRONIC LYMPHOCYTIC LEUKEMIA (CLL) STUDY.	2019	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
12 5092  32 PLACENTAL EPIGENETIC MARKS RELATED TO GESTATIONAL WEIGHT GAIN REVEAL POTENTIAL GENES ASSOCIATED WITH OFFSPRING OBESITY PARAMETERS. OBJECTIVE: OFFSPRING EXPOSED TO GESTATIONAL OBESITY HAVE AN INCREASED RISK FOR CHRONIC DISEASES. INCREASING EVIDENCE SUGGESTS THAT EPIGENETICS MAY PLAY A MECHANISTIC ROLE IN METABOLIC PROGRAMMING. THIS STUDY AIMED TO IDENTIFY PLACENTAL DNA METHYLATION MARKS ASSOCIATED WITH GESTATIONAL WEIGHT GAIN (GWG) AND TO STUDY THEIR ASSOCIATION WITH OFFSPRING OBESITY PARAMETERS AT SCHOOL AGE. METHODS: A GLOBAL METHYLATION ARRAY WAS PERFORMED IN 24 PLACENTAS FROM MOTHERS WITH DIFFERENT DEGREES OF GWG (SCREENING SAMPLE). THE METHYLATION PERCENTAGE OF FOUR CYTOSINE-GUANINE (CPG) SITES AND THE RELATIVE EXPRESSION OF THE RESPECTIVE ANNOTATED GENES WERE STUDIED IN 90 ADDITIONAL PLACENTAS (VALIDATION SAMPLE). ASSOCIATIONS OF THESE EPIGENETIC MARKS WITH CLINICAL PARAMETERS IN THE OFFSPRING AT 6 YEARS OF AGE WERE EXAMINED. RESULTS: THE SCREENING ANALYSIS IDENTIFIED 104 CPG SITES (97 GENES) ASSOCIATED WITH GWG. THE VALIDATION ANALYSIS OF FOUR SELECTED CPG SITES (ANNOTATING FOR FRAT1, SNX5, AND KCNK3 GENES) SHOWED THAT THE UPREGULATION OF SNX5 METHYLATION, THE DOWNREGULATION OF FRAT1 METHYLATION, AND KCNK3 UNDEREXPRESSION ASSOCIATED WITH AN ADVERSE METABOLIC PHENOTYPE IN CHILDREN OF WOMEN WITH INCREASED GWG. CONCLUSIONS: THESE RESULTS SUGGEST THAT PLACENTAL REGULATION OF FRAT1, SNX5, AND KCNK3 RELATES TO OBESITY PARAMETERS IN OFFSPRING EXPOSED TO EXCESSIVE GWG AND THEREBY COULD CONDITION THE RISK FOR FUTURE METABOLIC DISORDERS.	2023	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
13 4736  35 NOVEL EPIGENETIC BIOMARKERS MEDIATING BISPHENOL A EXPOSURE AND METABOLIC PHENOTYPES IN FEMALE MICE. THERE IS COMPELLING EVIDENCE THAT EPIGENETIC MODIFICATIONS LINK DEVELOPMENTAL ENVIRONMENTAL INSULTS TO ADULT DISEASE SUSCEPTIBILITY. ANIMAL STUDIES HAVE ASSOCIATED PERINATAL BISPHENOL A (BPA) EXPOSURE TO ALTERED DNA METHYLATION, BUT THESE STUDIES ARE OFTEN LIMITED TO CANDIDATE GENE AND GLOBAL NON-LOCI-SPECIFIC APPROACHES. BY USING AN EPIGENOME-WIDE DISCOVERY PLATFORM, WE ELUCIDATED EPIGENETIC ALTERATIONS IN LIVER TISSUE FROM ADULT MICE OFFSPRING (10 MONTHS) FOLLOWING PERINATAL BPA EXPOSURE AT HUMAN PHYSIOLOGICALLY RELEVANT DOSES (50-NG, 50-MUG, AND 50-MG BPA/KG DIET). BIOLOGICAL PATHWAY ANALYSIS IDENTIFIED AN ENRICHMENT OF SIGNIFICANT DIFFERENTIALLY METHYLATED REGIONS IN METABOLIC PATHWAYS AMONG FEMALES. FURTHERMORE, THROUGH THE USE OF TOP ENRICHED BIOLOGICAL PATHWAYS, 4 CANDIDATE GENES WERE CHOSEN TO ASSESS DNA METHYLATION AS A MEDIATING FACTOR LINKING THE ASSOCIATION OF PERINATAL BPA EXPOSURE TO METABOLIC PHENOTYPES PREVIOUSLY OBSERVED IN FEMALE OFFSPRING. DNA METHYLATION STATUS AT JANUS KINASE-2 (JAK-2), RETINOID X RECEPTOR (RXR), REGULATORY FACTOR X-ASSOCIATED PROTEIN (RFXAP), AND TRANSMEMBRANE PROTEIN 238 (TMEM238) WAS USED WITHIN A MEDIATIONAL REGRESSION ANALYSIS. DNA METHYLATION IN ALL FOUR OF THE CANDIDATE GENES WAS IDENTIFIED AS A MEDIATOR IN THE MECHANISTIC PATHWAY OF DEVELOPMENTAL BPA EXPOSURE AND FEMALE-SPECIFIC ENERGY EXPENDITURE, BODY WEIGHT, AND BODY FAT PHENOTYPES. DATA GENERATED FROM THIS STUDY ARE CRUCIAL FOR DECIPHERING THE MECHANISTIC ROLE OF EPIGENETICS IN THE PATHOGENESIS OF CHRONIC DISEASE AND THE DEVELOPMENT OF EPIGENETIC-BASED PREVENTION AND THERAPEUTIC STRATEGIES FOR COMPLEX HUMAN DISEASE.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
14 3125  32 GHSR DNA HYPERMETHYLATION IS A COMMON EPIGENETIC ALTERATION OF HIGH DIAGNOSTIC VALUE IN A BROAD SPECTRUM OF CANCERS. IDENTIFICATION OF A SINGLE MOLECULAR TRAIT THAT IS DETERMINANT OF COMMON MALIGNANCIES MAY SERVE AS A POWERFUL DIAGNOSTIC SUPPLEMENT TO CANCER TYPE-SPECIFIC MARKERS. HERE, WE REPORT A DNA METHYLATION MARK THAT IS CHARACTERISTIC OF SEVEN STUDIED MALIGNANCIES, NAMELY CANCERS OF LUNG, BREAST, PROSTATE, PANCREAS, COLORECTUM, GLIOBLASTOMA AND B CELL CHRONIC LYMPHOCYTIC LEUKAEMIA (CLL) (N = 137). THIS MARK WAS DEFINED BY SUBSTANTIAL HYPERMETHYLATION AT THE PROMOTER AND FIRST EXON OF GROWTH HORMONE SECRETAGOUGE RECEPTOR (GHSR) THROUGH BISULFITE PYROSEQUENCING. THE DEGREE OF ABERRANT METHYLATION WAS CAPABLE OF ACCURATE DISCRIMINATION BETWEEN CANCER AND CONTROL SAMPLES. THE HIGHEST SENSITIVITY AND SPECIFICITY OF CANCER DETECTION WAS ACHIEVED FOR CANCERS OF PANCREAS, LUNG, BREAST AND CLL YIELDING THE AREA UNDER THE CURVE (AUC) VALUES OF 1.0000, 0.9952, 0.9800 AND 0.9400, RESPECTIVELY. NARROWING TO A SINGLE CPG SITE WITHIN THE GENE'S PROMOTER OR FOUR CONSECUTIVE CPG UNITS OF THE HIGHEST METHYLATION LEVELS WITHIN THE FIRST EXON IMPROVED THE DETECTION POWER. GHSR HYPERMETHYLATION WAS DETECTED ALREADY AT THE EARLY STAGE TUMORS. THE ACCURATE PERFORMANCE OF THIS MARKER WAS FURTHER REPLICATED IN AN INDEPENDENT SET OF PANCREATIC CANCER AND CONTROL SAMPLES (N = 78). THESE FINDINGS SUPPORT THE CANDIDATURE OF GHSR METHYLATION AS A HIGHLY ACCURATE PAN-CANCER MARKER.	2015	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
15 3050  22 GENOME-WIDE ASSOCIATION ANALYSES FOR LUNG FUNCTION AND CHRONIC OBSTRUCTIVE PULMONARY DISEASE IDENTIFY NEW LOCI AND POTENTIAL DRUGGABLE TARGETS. CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) IS CHARACTERIZED BY REDUCED LUNG FUNCTION AND IS THE THIRD LEADING CAUSE OF DEATH GLOBALLY. THROUGH GENOME-WIDE ASSOCIATION DISCOVERY IN 48,943 INDIVIDUALS, SELECTED FROM EXTREMES OF THE LUNG FUNCTION DISTRIBUTION IN UK BIOBANK, AND FOLLOW-UP IN 95,375 INDIVIDUALS, WE INCREASED THE YIELD OF INDEPENDENT SIGNALS FOR LUNG FUNCTION FROM 54 TO 97. A GENETIC RISK SCORE WAS ASSOCIATED WITH COPD SUSCEPTIBILITY (ODDS RATIO PER 1 S.D. OF THE RISK SCORE ( APPROXIMATELY 6 ALLELES) (95% CONFIDENCE INTERVAL) = 1.24 (1.20-1.27), P = 5.05 X 10(-49)), AND WE OBSERVED A 3.7-FOLD DIFFERENCE IN COPD RISK BETWEEN INDIVIDUALS IN THE HIGHEST AND LOWEST GENETIC RISK SCORE DECILES IN UK BIOBANK. THE 97 SIGNALS SHOW ENRICHMENT IN GENES FOR DEVELOPMENT, ELASTIC FIBERS AND EPIGENETIC REGULATION PATHWAYS. WE HIGHLIGHT TARGETS FOR DRUGS AND COMPOUNDS IN DEVELOPMENT FOR COPD AND ASTHMA (GENES IN THE INOSITOL PHOSPHATE METABOLISM PATHWAY AND CHRM3) AND DESCRIBE TARGETS FOR POTENTIAL DRUG REPOSITIONING FROM OTHER CLINICAL INDICATIONS.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
16 2603  36 EPIGENETICS, ENVIRONMENT AND EPIDEMIOLOGY: AN INTERVIEW WITH KARL KELSEY. IN THIS INTERVIEW, PROFESSOR KARL KELSEY SPEAKS WITH STORM JOHNSON, COMMISSIONING EDITOR FOR EPIGENOMICS, ON HIS WORK TO DATE IN THE FIELD OF ENVIRONMENTAL EPIGENOMICS AND EPIDEMIOLOGY. DR KARL KELSEY, MD, MOH IS A PROFESSOR OF EPIDEMIOLOGY AND PATHOLOGY AND LABORATORY MEDICINE AT BROWN UNIVERSITY. HE IS THE FOUNDING DIRECTOR OF THE CENTER FOR ENVIRONMENTAL HEALTH AND TECHNOLOGY AND HEAD OF THE ENVIRONMENTAL HEALTH SECTION AT THE DEPARTMENT OF EPIDEMIOLOGY. DR KELSEY IS INTERESTED IN THE APPLICATION OF LABORATORY-BASED BIOMARKERS IN ENVIRONMENTAL DISEASE, WITH EXPERIENCE IN CHRONIC DISEASE EPIDEMIOLOGY AND TUMOR BIOLOGY. THE GOALS OF HIS WORK INCLUDE A MECHANISTIC UNDERSTANDING OF INDIVIDUAL SUSCEPTIBILITY TO EXPOSURE-RELATED CANCERS. IN ADDITION, HIS LABORATORY IS INTERESTED IN TUMOR BIOLOGY, INVESTIGATING SOMATIC ALTERATIONS IN TUMOR TISSUE FROM THE PATIENTS WHO HAVE DEVELOPED EXPOSURE-RELATED CANCERS. THIS WORK INVOLVES THE USE OF AN EPIDEMIOLOGIC APPROACH TO CHARACTERIZE EPIGENETIC AND GENETIC ALTERATION OF GENES IN THE CAUSAL PATHWAY FOR MALIGNANCY. ACTIVE WORK INCLUDES SEVERAL STUDIES OF INDIVIDUAL SUSCEPTIBILITY TO CANCER. DR KELSEY'S LABORATORY MAINLY INVESTIGATES SUSCEPTIBILITY TO SMOKING-RELATED LUNG CANCER AND STUDIES MULTI-RACIAL AND ETHNIC POPULATIONS. IN ADDITION, THE LABORATORY IS ALSO INVOLVED WITH THE STUDY OF INHERITED SUSCEPTIBILITY TO BRAIN TUMORS AND PANCREATIC CANCER. MAJOR CASE CONTROL STUDIES THAT ARE ONGOING IN THE LABORATORY INCLUDE STUDIES DESIGNED TO UNDERSTAND INHERITED AND ACQUIRED SUSCEPTIBILITY IN HEAD AND NECK CANCERS. THE LABORATORY IS ALSO INVOLVED IN A CASE CONTROL STUDY OF ASBESTOS-ASSOCIATED MESOTHELIOMA, ARSENIC EXPOSURE, CIGARETTE SMOKING AND BLADDER CANCER. CONSIDERABLE WORK IS BEING DEVOTED TO UNDERSTANDING THE MECHANISMS OF ACTION OF BOTH ASBESTOS AND ARSENIC INCLUDING THEIR ABILITY TO AFFECT PROMOTER METHYLATION AND GENE SILENCING IN CARCINOGENESIS. RECENT LABORATORY STUDIES INCLUDES AN INTEREST IN USING NEWLY DEVELOPED DNA METHYLATION BIOMARKERS TO PROBE IMMUNE PROFILES FROM ARCHIVED BLOOD. DR KELSEY RECEIVED HIS MD FROM THE UNIVERSITY OF MINNESOTA AND MASTERS OF OCCUPATIONAL HEALTH FROM HARVARD UNIVERSITY.	2022	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  
17 6190  42 THE IMPACT OF METHYLATION QUANTITATIVE TRAIT LOCI (MQTLS) ON ACTIVE SMOKING-RELATED DNA METHYLATION CHANGES. BACKGROUND: METHYLATION QUANTITATIVE TRAIT LOCI (MQTLS) ARE THE GENETIC VARIANTS THAT MAY AFFECT THE DNA METHYLATION PATTERNS OF CPG SITES. HOWEVER, THEIR ROLES IN INFLUENCING THE DISTURBANCES OF SMOKING-RELATED EPIGENETIC CHANGES HAVE NOT BEEN WELL ESTABLISHED. THIS STUDY WAS CONDUCTED TO ADDRESS WHETHER MQTLS EXIST IN THE VICINITY OF SMOKING-RELATED CPG SITES (+/- 50 KB) AND TO EXAMINE THEIR ASSOCIATIONS WITH SMOKING EXPOSURE AND ALL-CAUSE MORTALITY IN OLDER ADULTS. RESULTS: WE OBTAINED DNA METHYLATION PROFILES IN WHOLE BLOOD SAMPLES BY ILLUMINA INFINIUM HUMAN METHYLATION 450 BEADCHIP ARRAY OF TWO INDEPENDENT SUBSAMPLES OF THE ESTHER STUDY (DISCOVERY SET, N = 581; VALIDATION SET, N = 368) AND THEIR CORRESPONDING GENOTYPING DATA USING THE ILLUMINA INFINIUM ONCOARRAY BEADCHIP. AFTER CORRECTION FOR MULTIPLE TESTING (FDR), WE SUCCESSFULLY IDENTIFIED THAT 70 OUT OF 151 PREVIOUSLY REPORTED SMOKING-RELATED CPG SITES WERE SIGNIFICANTLY ASSOCIATED WITH 192 SNPS WITHIN THE 50 KB SEARCH WINDOW OF EACH LOCUS. THE 192 MQTLS SIGNIFICANTLY INFLUENCED THE ACTIVE SMOKING-RELATED DNA METHYLATION CHANGES, WITH PERCENTAGE CHANGES RANGING FROM 0.01 TO 18.96%, ESPECIALLY FOR THE WEAKLY/MODERATELY SMOKING-RELATED CPG SITES. HOWEVER, THESE IDENTIFIED MQTLS WERE NOT DIRECTLY ASSOCIATED WITH ACTIVE SMOKING EXPOSURE OR ALL-CAUSE MORTALITY. CONCLUSIONS: OUR FINDINGS CLEARLY DEMONSTRATED THAT IF NOT DEALT WITH PROPERLY, THE MQTLS MIGHT IMPAIR THE POWER OF EPIGENETIC-BASED MODELS OF SMOKING EXPOSURE TO A CERTAIN EXTENT. IN ADDITION, SUCH GENETIC VARIANTS COULD BE THE KEY FACTOR TO DISTINGUISH BETWEEN THE HERITABLE AND SMOKING-INDUCED IMPACT ON EPIGENOME DISPARITIES. THESE MQTLS ARE OF SPECIAL IMPORTANCE WHEN DNA METHYLATION MARKERS MEASURED BY ILLUMINA INFINIUM ASSAY ARE USED FOR ANY COMPARATIVE POPULATION STUDIES RELATED TO SMOKING-RELATED CANCERS AND CHRONIC DISEASES.	2017	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
18 1846  35 EFFECTS OF TWO TYPES OF ENERGY RESTRICTION ON METHYLATION LEVELS OF ADIPONECTIN RECEPTOR 1 AND LEPTIN RECEPTOR OVERLAPPING TRANSCRIPT IN A MOUSE MAMMARY TUMOUR VIRUS-TRANSFORMING GROWTH FACTOR-ALPHA BREAST CANCER MOUSE MODEL. THE ROLE OF ADIPONECTIN AND LEPTIN SIGNALLING PATHWAYS HAS BEEN SUGGESTED TO PLAY IMPORTANT ROLES IN THE PROTECTIVE EFFECTS OF ENERGY RESTRICTION (ER) ON MAMMARY TUMOUR (MT) DEVELOPMENT. TO STUDY THE EFFECTS OF ER ON THE METHYLATION LEVELS IN ADIPONECTIN RECEPTOR 1 (ADIPOR1) AND LEPTIN RECEPTOR OVERLAPPING TRANSCRIPT (LEPROT) GENES USING THE PYROSEQUENCING METHOD IN MAMMARY FAT PAD TISSUE, MOUSE MAMMARY TUMOUR VIRUS-TRANSFORMING GROWTH FACTOR-ALPHA (MMTV-TGF-ALPHA) FEMALE MICE WERE RANDOMLY ASSIGNED TO AD LIBITUM (AL), CHRONIC ER (CER, 15 % ER) OR INTERMITTENT ER (3 WEEKS AL AND 1 WEEK 60 % ER IN CYCLIC PERIODS) GROUPS AT 10 WEEKS OF AGE UNTIL 82 WEEKS OF AGE. THE METHYLATION LEVELS OF ADIPOR1 IN THE CER GROUP WERE HIGHER THAN THOSE IN THE AL GROUP AT WEEK 49/50 (P < 0.05), WHILE THE LEVELS OF METHYLATION FOR ADIPOR1 AND LEPROT GENES WERE SIMILAR AMONG THE OTHER GROUPS. ALSO, THE METHYLATION LEVELS AT CPG2 AND CPG3 REGIONS OF THE PROMOTER REGION OF THE ADIPOR1 GENE IN THE CER GROUP WERE THREE TIMES HIGHER (P < 0.05), WHILE CPG1 ISLAND OF LEPROT METHYLATION WAS SIGNIFICANTLY LOWER COMPARED WITH THE OTHER GROUPS (P < 0.05). ADIPONECTIN AND LEPTIN GENE EXPRESSION LEVELS WERE CONSISTENT WITH THE METHYLATION LEVELS. WE ALSO OBSERVED A CHANGE WITH AGEING IN METHYLATION LEVELS OF THESE GENES. THESE RESULTS INDICATE THAT DIFFERENT TYPES OF ER MODIFY METHYLATION LEVELS OF ADIPOR1 AND LEPROT IN DIFFERENT WAYS AND CER HAD A MORE SIGNIFICANT EFFECT ON METHYLATION LEVELS OF BOTH GENES. EPIGENETIC REGULATION OF THESE GENES MAY PLAY IMPORTANT ROLES IN THE PREVENTIVE EFFECTS OF ER AGAINST MT DEVELOPMENT AND AGEING PROCESSES.	2021	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
19 6358  45 THE ROLE OF IL?16 GENE POLYMORPHISMS IN ENDOMETRIOSIS. ENDOMETRIOSIS IS ONE OF THE MOST COMMON GYNECOLOGICAL DISEASES AFFECTING UP TO 10% OF THE FEMALE POPULATION OF CHILDBEARING AGE AND A MAJOR CAUSE OF PAIN AND INFERTILITY. IT IS INFLUENCED BY MULTIPLE GENETIC, EPIGENETIC AND ENVIRONMENTAL FACTORS. INTERLEUKIN?16 (IL?16) IS A PROINFLAMMATORY CYTOKINE PLAYING A PIVOTAL ROLE IN MANY INFLAMMATORY AND AUTOIMMUNE DISEASES AS WELL AS IN THE PATHOGENESIS OF ENDOMETRIOSIS. THE AIM OF THE PRESENT STUDY WAS TO EVALUATE THE ASSOCIATION OF TWO IL?16 GENE SINGLE NUCLEOTIDE POLYMORPHISMS (SNPS), RS4072111 AND RS11556218, WITH THE RISK OF ENDOMETRIOSIS IN WOMEN FROM GREECE AS WELL AS TO GAIN INSIGHT ABOUT THE STRUCTURAL CONSEQUENCES OF THESE TWO EXONIC SNPS REGARDING DEVELOPMENT OF THE DISEASE. A TOTAL OF 159 WOMEN WITH ENDOMETRIOSIS (STAGES I?IV) HOSPITALIZED FOR ENDOMETRIOSIS, DIAGNOSED BY LAPAROSCOPIC INTERVENTION AND HISTOLOGICALLY CONFIRMED, AND 146 NORMAL CONTROLS WERE RECRUITED AND GENOTYPED. SUBJECTS WERE GENOTYPED USING A POLYMERASE CHAIN REACTION RESTRICTION FRAGMENT LENGTH POLYMORPHISM (PCR?RFLP) STRATEGY. A SIGNIFICANT ASSOCIATION WAS DETECTED REGARDING THE GG AND GT GENOTYPE AS WELL AS 'G' ALLELE OF RS11556218 IN PATIENTS WITH ENDOMETRIOSIS. THE RS4072111 SNP OF THE IL?16 GENE WAS NOT FOUND TO BE ASSOCIATED WITH AN INCREASED SUSCEPTIBILITY TO ENDOMETRIOSIS EITHER FOR ALL PATIENTS (STAGES I?IV) OR FOR STAGE III AND IV OF THE DISEASE ONLY. OUR RESULTS DEMONSTRATED THAT RS11556218 IS ASSOCIATED WITH ENDOMETRIOSIS IN GREEK WOMEN, PROBABLY BY RESULTING IN THE ABERRANT EXPRESSION OF IL?16, AS SUGGESTED BY THE BIOINFORMATICS ANALYSIS CONDUCTED ON THE SNP?DERIVED PROTEIN SEQUENCES, WHICH INDICATED A POSSIBLE ASSOCIATION BETWEEN MUTATION AND FUNCTIONAL MODIFICATION OF PRO?IL?16.	2018	
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 
20 5722  57 SISTER CHROMATID EXCHANGE AND PROLIFERATIVE RATE INDEX IN THE LONGITUDINAL RISK ASSESSMENT OF OCCUPATIONAL EXPOSURE TO PESTICIDES. AT PRESENT, THERE ARE MORE THAN 1,000 CHEMICALS CLASSIFIED AS PESTICIDES AND MANY REPORTS HAVE SHOWN THAT SOME OF THEM HAVE GENOTOXIC PROPERTIES. IN THE PRESENT LONGITUDINAL STUDY, POSSIBLE GENETIC DAMAGE ON A POPULATION OF WORKERS OCCUPATIONALLY EXPOSED TO A MIXTURE OF PESTICIDES BY USING SISTER CHROMATID EXCHANGE (SCE) ANALYSIS HAS BEEN EVALUATED. AS AN ADDITIONAL CYTOGENETIC PARAMETER, THE PROPORTION OF LYMPHOCYTES THAT UNDERGO ONE, TWO OR THREE CELL DIVISIONS AS WELL AS PROLIFERATIVE RATE INDEX HAVE BEEN DETERMINED. THIS STUDY WAS PERFORMED ON THE EXPOSED GROUP OF WORKERS EMPLOYED IN PESTICIDE PRODUCTION, SIMULTANEOUSLY EXPOSED TO A COMPLEX MIXTURE OF PESTICIDES (ATRAZINE, ALACHLOR, CYANAZINE, 2,4-DICHLOROPHENOXYACETIC ACID, AND MALATHION). THE BLOOD SAMPLES OF THE EXPOSED SUBJECTS WERE COLLECTED IN THREE DIFFERENT PERIODS: BEFORE THE BEGINNING OF THE NEW PESTICIDE PRODUCTION PERIOD, AFTER 8 MONTHS OF EVERYDAY WORK IN THE PESTICIDE PRODUCTION, AND 8 MONTHS AFTER THE REMOVAL OF SUBJECTS OUT OF THE PRODUCTION. IN ALL THREE SAMPLINGS, THE MEAN VALUE OF SCE AND NUMBER OF CELLS WITH HIGH SISTER CHROMATID EXCHANGE FREQUENCY (HFC) IN THE EXPOSED GROUP WAS SIGNIFICANTLY HIGHER IN THE COMPARISON WITH THE CONTROL GROUP. THERE WERE NO DIFFERENCES IN THE PROLIFERATIVE RATE INDEX (PRI) BETWEEN THE CONTROL AND EXPOSED GROUP, REGARDLESS OF THE SAMPLING PERIOD. IN BOTH GROUPS EXAMINED, THE MAJORITY OF LYMPHOCYTES WERE FOUND IN THE SECOND CELL DIVISION, FOLLOWING CULTIVATION. THESE RESULTS SUGGEST THAT THE INCREASE IN THE NUMBER OF SCE FOUND IN THE EXPOSED SUBJECTS IS NOT THE RESULT OF EITHER CYTOTOXIC OR EPIGENETIC ACTION OF PESTICIDE MIXTURE, BUT CHRONIC OCCUPATIONAL EXPOSURE TO MIXTURE OF PESTICIDES.	2002