1 929 83 CHRONIC INFLAMMATION: ACCELERATOR OF BIOLOGICAL AGING. BIOLOGICAL AGING IS CHARACTERIZED BY A CHRONIC LOW-GRADE INFLAMMATION LEVEL. THIS CHRONIC PHENOMENON HAS BEEN NAMED "INFLAMM-AGING" AND IS A HIGHLY SIGNIFICANT RISK FACTOR FOR MORBIDITY AND MORTALITY IN THE OLDER PERSONS. THE MOST COMMON THEORIES OF INFLAMM-AGING INCLUDE REDOX STRESS, MITOCHONDRIAL DYSFUNCTION, GLYCATION, DEREGULATION OF THE IMMUNE SYSTEM, HORMONAL CHANGES, EPIGENETIC MODIFICATIONS, AND DYSFUNCTION TELOMERE ATTRITION. INFLAMM-AGING PLAYS A ROLE IN THE INITIATION AND PROGRESSION OF AGE-RELATED DISEASES SUCH AS TYPE II DIABETES, ALZHEIMER'S DISEASE, CARDIOVASCULAR DISEASE, FRAILTY, SARCOPENIA, OSTEOPOROSIS, AND CANCER. THIS REVIEW WILL COVER THE IDENTIFICATION OF PATHWAYS THAT CONTROL AGE-RELATED INFLAMMATION ACROSS MULTIPLE SYSTEMS AND ITS POTENTIAL CAUSAL ROLE IN CONTRIBUTING TO ADVERSE HEALTH OUTCOMES. 2017 2 1387 28 DIABETIC GUT MICROBIOTA DYSBIOSIS AS AN INFLAMMAGING AND IMMUNOSENESCENCE CONDITION THAT FOSTERS PROGRESSION OF RETINOPATHY AND NEPHROPATHY. THE INCREASED PREVALENCE OF TYPE 2 DIABETES MELLITUS (T2DM) AND LIFE EXPECTANCY OF DIABETIC PATIENTS FOSTERS THE WORLDWIDE PREVALENCE OF RETINOPATHY AND NEPHROPATHY, TWO MAJOR MICROVASCULAR COMPLICATIONS THAT HAVE BEEN DIFFICULT TO TREAT WITH CONTEMPORARY GLUCOSE-LOWERING MEDICATIONS. THE GUT MICROBIOTA (GM) HAS BECOME A LIVELY FIELD RESEARCH IN THE LAST YEARS; THERE IS A GROWING RECOGNITION THAT ALTERED INTESTINAL MICROBIOTA COMPOSITION AND FUNCTION CAN DIRECTLY IMPACT THE PHENOMENON OF AGEING AND AGE-RELATED DISORDERS. IN FACT, HUMAN GM, ENVISAGED AS A POTENTIAL SOURCE OF NOVEL THERAPEUTICS, STRONGLY MODULATES HOST IMMUNITY AND METABOLISM. IT IS NOW CLEAR THAT GUT DYSBIOSIS AND THEIR PRODUCTS (E.G. P-CRESYL SULFATE, TRIMETHYLAMINE?N?OXIDE) DICTATE A SECRETORY ASSOCIATED SENESCENCE PHENOTYPE AND CHRONIC LOW-GRADE INFLAMMATION, FEATURES SHARED IN THE PHYSIOLOGICAL PROCESS OF AGEING ("INFLAMMAGING") AS WELL AS IN T2DM ("METAFLAMMATION") AND IN ITS MICROVASCULAR COMPLICATIONS. THIS REVIEW PROVIDES AN IN-DEPTH LOOK ON THE CROSSTALK BETWEEN GM, HOST IMMUNITY AND METABOLISM. FURTHER, IT CHARACTERIZES HUMAN GM SIGNATURES OF ELDERLY AND T2DM PATIENTS. FINALLY, A COMPREHENSIVE SCRUTINY OF RECENT MOLECULAR FINDINGS (E.G. EPIGENETIC CHANGES) UNDERLYING CAUSAL RELATIONSHIPS BETWEEN GM DYSBIOSIS AND DIABETIC RETINOPATHY/NEPHROPATHY COMPLICATIONS IS PINPOINTED, WITH THE ULTIMATE GOAL TO UNRAVEL POTENTIAL PATHOPHYSIOLOGICAL MECHANISMS THAT MAY BE EXPLORED, IN A NEAR FUTURE, AS PERSONALIZED DISEASE-MODIFYING THERAPEUTIC APPROACHES. 2019 3 4455 26 MOLECULAR MECHANISMS FOR THE VICIOUS CYCLE BETWEEN INSULIN RESISTANCE AND THE INFLAMMATORY RESPONSE IN OBESITY. THE COMPREHENSIVE ANABOLIC EFFECTS OF INSULIN THROUGHOUT THE BODY, IN ADDITION TO THE CONTROL OF GLYCEMIA, INCLUDE ENSURING LIPID HOMEOSTASIS AND ANTI-INFLAMMATORY MODULATION, ESPECIALLY IN ADIPOSE TISSUE (AT). THE PREVALENCE OF OBESITY, DEFINED AS A BODY MASS INDEX (BMI) >/= 30 KG/M(2), HAS BEEN INCREASING WORLDWIDE ON A PANDEMIC SCALE WITH ACCOMPANYING SYNDEMIC HEALTH PROBLEMS, INCLUDING GLUCOSE INTOLERANCE, INSULIN RESISTANCE (IR), AND DIABETES. IMPAIRED TISSUE SENSITIVITY TO INSULIN OR IR PARADOXICALLY LEADS TO DISEASES WITH AN INFLAMMATORY COMPONENT DESPITE HYPERINSULINEMIA. THEREFORE, AN EXCESS OF VISCERAL AT IN OBESITY INITIATES CHRONIC LOW-GRADE INFLAMMATORY CONDITIONS THAT INTERFERE WITH INSULIN SIGNALING VIA INSULIN RECEPTORS (INSRS). MOREOVER, IN RESPONSE TO IR, HYPERGLYCEMIA ITSELF STIMULATES A PRIMARILY DEFENSIVE INFLAMMATORY RESPONSE ASSOCIATED WITH THE SUBSEQUENT RELEASE OF NUMEROUS INFLAMMATORY CYTOKINES AND A REAL THREAT OF ORGAN FUNCTION DETERIORATION. IN THIS REVIEW, ALL COMPONENTS OF THIS VICIOUS CYCLE ARE CHARACTERIZED WITH PARTICULAR EMPHASIS ON THE INTERPLAY BETWEEN INSULIN SIGNALING AND BOTH THE INNATE AND ADAPTIVE IMMUNE RESPONSES RELATED TO OBESITY. INCREASED VISCERAL AT ACCUMULATION IN OBESITY SHOULD BE CONSIDERED THE MAIN ENVIRONMENTAL FACTOR RESPONSIBLE FOR THE DISRUPTION IN THE EPIGENETIC REGULATORY MECHANISMS IN THE IMMUNE SYSTEM, RESULTING IN AUTOIMMUNITY AND INFLAMMATION. 2023 4 241 28 ADIPOCYTE, IMMUNE CELLS, AND MIRNA CROSSTALK: A NOVEL REGULATOR OF METABOLIC DYSFUNCTION AND OBESITY. OBESITY IS CHARACTERIZED AS A COMPLEX AND MULTIFACTORIAL EXCESS ACCRETION OF ADIPOSE TISSUE (AT) ACCOMPANIED WITH ALTERATIONS IN THE IMMUNE RESPONSE THAT AFFECTS VIRTUALLY ALL AGE AND SOCIOECONOMIC GROUPS AROUND THE GLOBE. THE ABNORMAL ACCUMULATION OF AT LEADS TO SEVERAL METABOLIC DISEASES, INCLUDING NONALCOHOLIC FATTY LIVER DISORDER (NAFLD), LOW-GRADE INFLAMMATION, TYPE 2 DIABETES MELLITUS (T2DM), CARDIOVASCULAR DISORDERS (CVDS), AND CANCER. AT IS AN ENDOCRINE ORGAN COMPOSED OF ADIPOCYTES AND IMMUNE CELLS, INCLUDING B-CELLS, T-CELLS AND MACROPHAGES. THESE IMMUNE CELLS SECRETE VARIOUS CYTOKINES AND CHEMOKINES AND CROSSTALK WITH ADIPOKINES TO MAINTAIN METABOLIC HOMEOSTASIS AND LOW-GRADE CHRONIC INFLAMMATION. A NOVEL FORM OF ADIPOKINES, MICRORNA (MIRS), IS EXPRESSED IN MANY DEVELOPING PERIPHERAL TISSUES, INCLUDING ATS, T-CELLS, AND MACROPHAGES, AND MODULATES THE IMMUNE RESPONSE. MIRS ARE ESSENTIAL FOR INSULIN RESISTANCE, MAINTAINING THE TUMOR MICROENVIRONMENT, AND OBESITY-ASSOCIATED INFLAMMATION (OAI). THE ABNORMAL REGULATION OF AT, T-CELLS, AND MACROPHAGE MIRS MAY CHANGE THE FUNCTION OF DIFFERENT ORGANS INCLUDING THE PANCREAS, HEART, LIVER, AND SKELETAL MUSCLE. SINCE OBESITY AND INFLAMMATION ARE CLOSELY ASSOCIATED, THE DYSREGULATED EXPRESSION OF MIRS IN INFLAMMATORY ADIPOCYTES, T-CELLS, AND MACROPHAGES SUGGEST THE IMPORTANCE OF MIRS IN OAI. THEREFORE, IN THIS REVIEW ARTICLE, WE HAVE ELABORATED THE ROLE OF MIRS AS EPIGENETIC REGULATORS AFFECTING ADIPOCYTE DIFFERENTIATION, IMMUNE RESPONSE, AT BROWNING, ADIPOGENESIS, LIPID METABOLISM, INSULIN RESISTANCE (IR), GLUCOSE HOMEOSTASIS, OBESITY, AND METABOLIC DISORDERS. FURTHER, WE WILL DISCUSS A SET OF ALTERED MIRS AS NOVEL BIOMARKERS FOR METABOLIC DISEASE PROGRESSION AND THERAPEUTIC TARGETS FOR OBESITY. 2021 5 6169 24 THE GUT MICROBIOTA AND HEALTHY AGING: A MINI-REVIEW. THE GUT MICROBIOTA SHOWS A WIDE INTER-INDIVIDUAL VARIATION, BUT ITS WITHIN-INDIVIDUAL VARIATION IS RELATIVELY STABLE OVER TIME. A FUNCTIONAL CORE MICROBIOME, PROVIDED BY ABUNDANT BACTERIAL TAXA, SEEMS TO BE COMMON TO VARIOUS HUMAN HOSTS REGARDLESS OF THEIR GENDER, GEOGRAPHIC LOCATION, AND AGE. WITH ADVANCING CHRONOLOGICAL AGE, THE GUT MICROBIOTA BECOMES MORE DIVERSE AND VARIABLE. HOWEVER, WHEN MEASURES OF BIOLOGICAL AGE ARE USED WITH ADJUSTMENT FOR CHRONOLOGICAL AGE, OVERALL RICHNESS DECREASES, WHILE A CERTAIN GROUP OF BACTERIA ASSOCIATED WITH FRAILTY INCREASES. THIS HIGHLIGHTS THE IMPORTANCE OF CONSIDERING BIOLOGICAL OR FUNCTIONAL MEASURES OF AGING. STUDIES USING MODEL ORGANISMS INDICATE THAT AGE-RELATED GUT DYSBIOSIS MAY CONTRIBUTE TO UNHEALTHY AGING AND REDUCED LONGEVITY. THE GUT MICROBIOME DEPENDS ON THE HOST NUTRIENT SIGNALING PATHWAYS FOR ITS BENEFICIAL EFFECTS ON HOST HEALTH AND LIFESPAN, AND GUT DYSBIOSIS DISRUPTING THE INTERDEPENDENCE MAY DIMINISH THE BENEFICIAL EFFECTS OR EVEN HAVE REVERSE EFFECTS. GUT DYSBIOSIS CAN TRIGGER THE INNATE IMMUNE RESPONSE AND CHRONIC LOW-GRADE INFLAMMATION, LEADING TO MANY AGE-RELATED DEGENERATIVE PATHOLOGIES AND UNHEALTHY AGING. THE GUT MICROBIOTA COMMUNICATES WITH THE HOST THROUGH VARIOUS BIOMOLECULES, NUTRIENT SIGNALING-INDEPENDENT PATHWAYS, AND EPIGENETIC MECHANISMS. DISTURBANCE OF THESE COMMUNICATIONS BY AGE-RELATED GUT DYSBIOSIS CAN AFFECT THE HOST HEALTH AND LIFESPAN. THIS MAY EXPLAIN THE IMPACT OF THE GUT MICROBIOME ON HEALTH AND AGING. 2018 6 4271 26 MICROBIAL DYSBIOSIS-INDUCED OBESITY: ROLE OF GUT MICROBIOTA IN HOMOEOSTASIS OF ENERGY METABOLISM. THE GLOBAL OBESITY EPIDEMIC HAS NECESSITATED THE SEARCH FOR BETTER INTERVENTION STRATEGIES INCLUDING THE EXPLOITATION OF THE HEALTH BENEFITS OF SOME GUT MICROBIOTA AND THEIR METABOLIC PRODUCTS. THEREFORE, WE EXAMINED THE GUT MICROBIAL COMPOSITION AND MECHANISMS OF INTERACTION WITH THE HOST IN RELATION TO HOMOEOSTATIC ENERGY METABOLISM AND PATHOPHYSIOLOGY OF DYSBIOSIS-INDUCED METABOLIC INFLAMMATION AND OBESITY. WE ALSO DISCUSSED THE EUBIOTIC, HEALTH-PROMOTING EFFECTS OF PROBIOTICS AND PREBIOTICS AS WELL AS EPIGENETIC MODIFICATIONS ASSOCIATED WITH GUT MICROBIAL DYSBIOSIS AND RISK OF OBESITY. HIGH-FAT/CARBOHYDRATE DIET PROGRAMMES THE GUT MICROBIOTA TO ONE PREDOMINATED BY FIRMICUTES (CLOSTRIDIUM), PREVOTELLA AND METHANOBREVIBACTER BUT DEFICIENT IN BENEFICIAL GENERA/SPECIES SUCH AS BACTEROIDES, BIFIDOBACTERIUM, LACTOBACILLUS AND AKKERMANSIA. ALTERED GUT MICROBIOTA IS ASSOCIATED WITH DECREASED EXPRESSION OF SCFA THAT MAINTAIN INTESTINAL EPITHELIAL BARRIER INTEGRITY, REDUCE BACTERIAL TRANSLOCATION AND INFLAMMATION AND INCREASE EXPRESSION OF HUNGER-SUPPRESSING HORMONES. REDUCED AMOUNTS OF BENEFICIAL MICRO-ORGANISMS ALSO INHIBIT FASTING-INDUCED ADIPOCYTE FACTOR EXPRESSION LEADING TO DYSLIPIDAEMIA. A LOW-GRADE CHRONIC INFLAMMATION (METABOLIC ENDOTOXAEMIA) ENSUES WHICH CULMINATES IN OBESITY AND ITS CO-MORBIDITIES. THE SYNERGY OF HIGH-FAT DIET AND DYSBIOTIC GUT MICROBIOTA INITIATES A RECIPE THAT EPIGENETICALLY PROGRAMMES THE HOST FOR INCREASED ADIPOSITY AND POOR GLYCAEMIC CONTROL. INTERESTINGLY, THESE OBESOGENIC MECHANISTIC PATHWAYS THAT ARE TRANSMITTABLE FROM ONE GENERATION TO ANOTHER CAN BE MODULATED THROUGH THE ADMINISTRATION OF PROBIOTICS, PREBIOTICS AND SYNBIOTICS. THOUGH THE INFLUENCE OF GUT MICROBIOTA ON THE RISK OF OBESITY AND SEVERAL INTERVENTION STRATEGIES HAVE BEEN EXTENSIVELY DEMONSTRATED IN ANIMAL MODELS, APPLICATION IN HUMANS STILL REQUIRES FURTHER ROBUST INVESTIGATION. 2020 7 6182 31 THE IMPACT OF ADIPOSE TISSUE-DERIVED MIRNAS IN METABOLIC SYNDROME, OBESITY, AND CANCER. OBESITY IS A MULTIFACTORIAL AND COMPLEX CONDITION THAT IS CHARACTERIZED BY ABNORMAL AND EXCESSIVE WHITE ADIPOSE TISSUE ACCUMULATION, WHICH CAN LEAD TO THE DEVELOPMENT OF METABOLIC DISEASES, SUCH AS TYPE 2 DIABETES MELLITUS, NONALCOHOLIC FATTY LIVER DISEASE, CARDIOVASCULAR DISEASES, AND SEVERAL TYPES OF CANCER. OBESITY IS CHARACTERIZED BY EXCESSIVE ADIPOSE TISSUE ACCUMULATION AND ASSOCIATED WITH ALTERATIONS IN IMMUNITY, DISPLAYING A CHRONIC LOW-GRADE INFLAMMATION PROFILE. ADIPOSE TISSUE IS A DYNAMIC AND COMPLEX ENDOCRINE ORGAN COMPOSED NOT ONLY BY ADIPOCYTES, BUT SEVERAL IMMUNOLOGICAL CELLS, WHICH CAN SECRETE HORMONES, CYTOKINES AND MANY OTHER FACTORS CAPABLE OF REGULATING METABOLIC HOMEOSTASIS AND SEVERAL CRITICAL BIOLOGICAL PATHWAYS. REMARKABLY, ADIPOSE TISSUE IS A MAJOR SOURCE OF CIRCULATING MICRORNAS (MIRNAS), RECENTLY DESCRIBED AS A NOVEL FORM OF ADIPOKINES. SEVERAL ADIPOSE TISSUE-DERIVED MIRNAS ARE DEEPLY ASSOCIATED WITH ADIPOCYTES DIFFERENTIATION AND HAVE BEEN IDENTIFIED WITH AN ESSENTIAL ROLE IN OBESITY-ASSOCIATED INFLAMMATION, INSULIN RESISTANCE, AND TUMOR MICROENVIRONMENT. DURING OBESITY, ADIPOSE TISSUE CAN COMPLETELY CHANGE THE PROFILE OF THE SECRETED MIRNAS, INFLUENCING CIRCULATING MIRNAS AND IMPACTING THE DEVELOPMENT OF DIFFERENT PATHOLOGICAL CONDITIONS, SUCH AS OBESITY, METABOLIC SYNDROME, AND CANCER. IN THIS REVIEW, WE DISCUSS HOW MIRNAS CAN ACT AS EPIGENETIC REGULATORS AFFECTING ADIPOGENESIS, ADIPOCYTE DIFFERENTIATION, LIPID METABOLISM, BROWNING OF THE WHITE ADIPOSE TISSUE, GLUCOSE HOMEOSTASIS, AND INSULIN RESISTANCE, IMPACTING DEEPLY OBESITY AND METABOLIC DISEASES. MOREOVER, WE CHARACTERIZE HOW MIRNAS CAN OFTEN ACT AS ONCOGENIC AND TUMOR SUPPRESSOR MOLECULES, SIGNIFICANTLY MODULATING CANCER ESTABLISHMENT AND PROGRESSION. FURTHERMORE, WE HIGHLIGHT IN THIS MANUSCRIPT HOW ADIPOSE TISSUE-DERIVED MIRNAS CAN FUNCTION AS IMPORTANT NEW THERAPEUTIC TARGETS. 2020 8 3668 29 INFLAMMAGEING AND METAFLAMMATION: THE YIN AND YANG OF TYPE 2 DIABETES. TYPE 2 DIABETES MELLITUS (T2DM) IS CHARACTERISED BY CHRONIC LOW-GRADE INFLAMMATION, RECENTLY REFERRED TO AS 'METAFLAMMATION', A RELEVANT FACTOR CONTRIBUTING TO THE DEVELOPMENT OF BOTH DIABETES AND ITS COMPLICATIONS. NONETHELESS, 'CANONICAL' ANTI-INFLAMMATORY DRUGS DO NOT YIELD SATISFACTORY RESULTS IN TERMS OF PREVENTION OF DIABETES PROGRESSION AND OF CARDIOVASCULAR EVENTS, SUGGESTING THAT THE CAUSAL MECHANISMS FOSTERING METAFLAMMATION DESERVE FURTHER RESEARCH TO IDENTIFY NEW DRUGGABLE TARGETS. METAFLAMMATION RESEMBLES AGEING-INDUCED LOW-GRADE INFLAMMATION, PREVIOUSLY REFERRED TO AS INFLAMMAGEING, IN TERMS OF CLINICAL PRESENTATION AND THE MOLECULAR PROFILE, POINTING TO A COMMON AETIOLOGY FOR BOTH CONDITIONS. ALONG WITH THE MECHANISMS PROPOSED TO FUEL INFLAMMAGEING, HERE WE DISSECT A PLETHORA OF PATHOLOGICAL CASCADES TRIGGERED BY GLUCO- AND LIPOTOXICITY, CONVERGING ON CANDIDATE PHENOMENA POSSIBLY EXPLAINING THE ENDURING PRO-INFLAMMATORY PROGRAM OBSERVED IN DIABETIC TISSUES, I.E. PERSISTENT IMMUNE-SYSTEM STIMULATION, ACCUMULATION OF SENESCENT CELLS, EPIGENETIC REARRANGEMENTS, AND ALTERATIONS IN MICROBIOTA COMPOSITION. WE DISCUSS THE POSSIBILITY OF HARNESSING THESE RECENT DISCOVERIES IN FUTURE THERAPIES FOR T2DM. MOREOVER, WE REVIEW RECENT EVIDENCE REGARDING THE ABILITY OF DIETS AND PHYSICAL EXERCISE TO MODULATE SELECTED INFLAMMATORY PATHWAYS RELEVANT FOR THE DIABETIC PATHOLOGY. FINALLY, WE EXAMINE THE LATEST FINDINGS SHOWING PUTATIVE ANTI-INFLAMMATORY MECHANISMS OF ANTI-HYPERGLYCAEMIC AGENTS WITH PROVEN EFFICACY AGAINST T2DM-INDUCED CARDIOVASCULAR COMPLICATIONS, IN ORDER TO GAIN INSIGHTS INTO QUICKLY TRANSLATABLE THERAPEUTIC APPROACHES. 2018 9 2699 24 EXCESS BODY WEIGHT: NOVEL INSIGHTS INTO ITS ROLES IN OBESITY COMORBIDITIES. EXCESS BODY WEIGHT IS A GLOBAL HEALTH PROBLEM DUE TO SEDENTARY LIFESTYLE AND UNHEALTHY DIET, AFFECTING 2 BILLION POPULATION WORLDWIDE. OBESITY IS A MAJOR RISK FACTOR FOR METABOLIC DISEASES. NOTABLY, THE METABOLIC RISK OF OBESITY LARGELY DEPENDS ON BODY WEIGHT DISTRIBUTION, OF WHICH VISCERAL ADIPOSE TISSUES BUT NOT SUBCUTANEOUS FATS ARE CLOSELY ASSOCIATED WITH OBESITY COMORBIDITIES, INCLUDING TYPE 2 DIABETES, NON-ALCOHOLIC FATTY LIVER DISEASE, CARDIOVASCULAR DISEASE AND CERTAIN TYPES OF CANCER. LATEST MULTI-OMICS AND MECHANISTICAL STUDIES REPORTED THE CRUCIAL INVOLVEMENT OF GENETIC AND EPIGENETIC ALTERATIONS, ADIPOKINES DYSREGULATION, IMMUNITY CHANGES, IMBALANCE OF WHITE AND BROWN ADIPOSE TISSUES, AND GUT MICROBIAL DYSBIOSIS IN MEDIATING THE PATHOGENIC ASSOCIATION BETWEEN VISCERAL ADIPOSE TISSUES AND COMORBIDITIES. IN THIS REVIEW, WE EXPLORE THE EPIDEMIOLOGY OF EXCESS BODY WEIGHT AND THE UP-TO-DATE MECHANISM OF HOW EXCESS BODY WEIGHT AND OBESITY LEAD TO CHRONIC COMPLICATIONS. WE ALSO EXAMINE THE UTILIZATION OF VISCERAL FAT MEASUREMENT AS AN ACCURATE CLINICAL PARAMETER FOR RISK ASSESSMENT IN HEALTHY INDIVIDUALS AND CLINICAL OUTCOME PREDICTION IN OBESE SUBJECTS. IN ADDITION, CURRENT APPROACHES FOR THE PREVENTION AND TREATMENT OF EXCESS BODY WEIGHT AND ITS RELATED METABOLIC COMORBIDITIES ARE FURTHER DISCUSSED. 2023 10 4396 29 MODULATION OF CHRONIC INFLAMMATION BY QUERCETIN: THE BENEFICIAL EFFECTS ON OBESITY. OBESITY HAS BECOME A MAJOR RISK FACTOR FOR THE DEVELOPMENT OF CHRONIC DISEASES SUCH AS INSULIN RESISTANCE, TYPE 2 DIABETES MELLITUS, AND CARDIOVASCULAR DISEASE. MOREOVER, OBESITY INDUCES CHRONIC INFLAMMATION IN ADIPOSE TISSUE, LIVER, SKELETAL MUSCLE, AND THE VASCULAR SYSTEM. QUERCETIN IS THE MAJOR REPRESENTATIVE OF THE FLAVONOID SUBCLASS OF FLAVONOLS, WHICH IS UBIQUITOUSLY CONTAINED WITHIN NATURAL PLANTS SUCH AS GREEN TEA, AND VEGETABLES, INCLUDING ONIONS AND APPLES. RESEARCHERS HAVE FOCUSED GREATER ATTENTION TO THE BENEFICIAL PHYSIOLOGICAL ROLES OF QUERCETIN, WHICH HAS ANTI-OXIDATIVE, ANTI-INFLAMMATORY, AND ANTI-FIBROTIC EFFECTS ON INSULIN RESISTANCE AND ATHEROSCLEROSIS IN OBESITY-RELATED DISEASES. ALSO, THE ANTI-INFLAMMATORY EFFECTS OF QUERCETIN ON INTESTINAL MICROBIOTA HAVE BEEN DEMONSTRATED IN OBESITY. IN ADDITION, THERE IS INCREASING EVIDENCE THAT QUERCETIN IS ASSOCIATED WITH EPIGENETIC ACTIVITIES IN CANCER, AND IN MATERNAL UNDERNUTRITION DURING GESTATION AND LACTATION. IN THIS REVIEW, WE FOCUS ON THE CHEMICAL PROPERTIES OF QUERCETIN, ITS DIETARY SOURCES IN OBESITY, AND ITS ANTI-INFLAMMATORY EFFECTS ON INSULIN RESISTANCE, ATHEROSCLEROSIS, INTESTINAL MICROBIOTA, AND MATERNAL UNDER-NUTRITION WITH EPIGENETIC ACTIVITY. 2020 11 1241 24 CURRENT AND FUTURE NUTRITIONAL STRATEGIES TO MODULATE INFLAMMATORY DYNAMICS IN METABOLIC DISORDERS. OBESITY, TYPE 2 DIABETES, AND OTHER METABOLIC DISORDERS HAVE A LARGE IMPACT ON GLOBAL HEALTH, ESPECIALLY IN WESTERN COUNTRIES. AN IMPORTANT HALLMARK OF METABOLIC DISORDERS IS CHRONIC LOW-GRADE INFLAMMATION. A KEY PLAYER IN CHRONIC LOW-GRADE INFLAMMATION IS DYSMETABOLISM, WHICH IS DEFINED AS THE INABILITY TO KEEP HOMEOSTASIS RESULTING IN LOSS OF LIPID CONTROL, OXIDATIVE STRESS, INFLAMMATION, AND INSULIN RESISTANCE. ALTHOUGH OFTEN NOT YET DETECTABLE IN THE CIRCULATION, CHRONIC LOW-GRADE INFLAMMATION CAN BE PRESENT IN ONE OR MULTIPLE ORGANS. THE RESPONSE TO A METABOLIC CHALLENGE CONTAINING LIPIDS MAY MAGNIFY DYSFUNCTIONALITIES AT THE TISSUE LEVEL, CAUSING AN OVERFLOW OF INFLAMMATORY MARKERS INTO THE CIRCULATION AND HENCE ALLOW DETECTION OF EARLY LOW-GRADE INFLAMMATION. HERE, WE SUMMARIZE THE EVIDENCE OF SUCCESSFUL APPLICATION OF METABOLIC CHALLENGE TESTS IN TYPE 2 DIABETES, METABOLIC SYNDROME, OBESITY, AND UNHEALTHY AGING. WE ALSO REVIEW HOW METABOLIC CHALLENGE TESTS HAVE BEEN SUCCESSFULLY APPLIED TO EVALUATE NUTRITIONAL INTERVENTION EFFECTS, INCLUDING AN "ANTI-INFLAMMATORY" MIXTURE, DARK CHOCOLATE, WHOLE GRAIN WHEAT AND OVERFEEDING. ADDITIONALLY, WE ELABORATE ON FUTURE STRATEGIES TO (RE)GAIN INFLAMMATORY FLEXIBILITY. THROUGH EPIGENETIC AND METABOLIC REGULATION, THE INFLAMMATORY RESPONSE MAY BE TRAINED BY REGULAR MILD AND METABOLIC TRIGGERS, WHICH CAN BE UNDERSTOOD FROM THE PERSPECTIVE OF TRAINED IMMUNITY, HORMESIS AND PRO-RESOLUTION. NEW STRATEGIES TO OPTIMIZE DYNAMICS OF INFLAMMATION MAY BECOME AVAILABLE. 2019 12 4891 26 OXIDATIVE STRESS AND INFLAMMATORY MARKERS IN PREDIABETES AND DIABETES. PREDIABETES IS A STATE OF ELEVATED PLASMA GLUCOSE IN WHICH THE THRESHOLD FOR DIABETES HAS NOT YET BEEN REACHED AND CAN PREDISPOSE TO THE DEVELOPMENT OF TYPE 2 DIABETES AND CARDIOVASCULAR DISEASES. INSULIN RESISTANCE AND IMPAIRED BETA-CELL FUNCTION ARE OFTEN ALREADY PRESENT IN PREDIABETES. HYPERGLYCEMIA CAN UPREGULATE MARKERS OF CHRONIC INFLAMMATION AND CONTRIBUTE TO INCREASED REACTIVE OXYGEN SPECIES (ROS) GENERATION, WHICH ULTIMATELY CAUSE VASCULAR DYSFUNCTION. CONVERSELY, INCREASED OXIDATIVE STRESS AND INFLAMMATION CAN LEAD TO INSULIN RESISTANCE AND IMPAIRED INSULIN SECRETION. PROPER TREATMENT OF HYPERGLYCEMIA AND INHIBITION OF ROS OVERPRODUCTION IS CRUCIAL FOR DELAYING ONSET OF DIABETES AND FOR PREVENTION OF CARDIOVASCULAR COMPLICATIONS. THUS, IT IS IMPERATIVE TO DETERMINE THE MECHANISMS INVOLVED IN THE PROGRESSION FROM PREDIABETES TO DIABETES INCLUDING A CLARIFICATION OF HOW OLD AND NEW MEDICATIONS AFFECT OXIDATIVE AND IMMUNE MECHANISMS OF DIABETES. IN THIS REVIEW, WE DISCUSS THE RELATIONSHIP BETWEEN OXIDATIVE STRESS AND HYPERGLYCEMIA ALONG WITH LINKS BETWEEN INFLAMMATION AND PREDIABETES. ADDITIONALLY, THE EFFECTS OF HYPERGLYCEMIC MEMORY, MICROVESICLES, MICRO-RNA, AND EPIGENETIC REGULATION ON INFLAMMATION, OXIDATIVE STATE, AND GLYCEMIC CONTROL ARE HIGHLIGHTED. ADIPOSE TISSUE AND THEIR INFLUENCE ON CHRONIC INFLAMMATION ARE ALSO BRIEFLY REVIEWED. FINALLY, THE ROLE OF IMMUNE-TARGETED THERAPIES AND ANTI-DIABETIC MEDICATION ON GLYCEMIC CONTROL AND OXIDATIVE STRESS ARE DISCUSSED. 2019 13 3922 26 LIPIDS AND THE HALLMARKS OF AGEING: FROM PATHOLOGY TO INTERVENTIONS. LIPIDS ARE CRITICAL STRUCTURAL AND FUNCTIONAL ARCHITECTS OF CELLULAR HOMEOSTASIS. CHANGE IN SYSTEMIC LIPID PROFILE IS A CLINICAL INDICATOR OF UNDERLYING METABOLIC PATHOLOGIES, AND EMERGING EVIDENCE IS NOW DEFINING NOVEL ROLES OF LIPIDS IN MODULATING ORGANISMAL AGEING. CHARACTERISTIC ALTERATIONS IN LIPID METABOLISM CORRELATE WITH AGE, AND IMPAIRED SYSTEMIC LIPID PROFILE CAN ALSO ACCELERATE THE DEVELOPMENT OF AGEING PHENOTYPE. THE PRESENT WORK PROVIDES A COMPREHENSIVE REVIEW OF THE EXTENT OF LIPIDS AS REGULATORS OF THE MODERN HALLMARKS OF AGEING VIZ., CELLULAR SENESCENCE, CHRONIC INFLAMMATION, GUT DYSBIOSIS, TELOMERE ATTRITION, GENOME INSTABILITY, PROTEOSTASIS AND AUTOPHAGY, EPIGENETIC ALTERATIONS, AND STEM CELLS DYSFUNCTIONS. CURRENT EVIDENCE ON THE MODULATION OF EACH OF THESE HALLMARKS HAS BEEN DISCUSSED WITH EMPHASIS ON INHERENT AGE-DEPENDENT DEFICIENCIES IN LIPID METABOLISM AS WELL AS EXOGENOUS LIPID CHANGES. THERE APPEARS TO BE SUFFICIENT EVIDENCE TO CONSIDER IMPAIRED LIPID METABOLISM AS KEY DRIVER OF THE AGEING PROCESS ALTHOUGH MUCH OF KNOWLEDGE IS YET FRAGMENTED. CONSIDERING DIETARY LIPIDS, THE TYPE AND QUANTITY OF LIPIDS IN THE DIET IS A SIGNIFICANT, BUT OFTEN OVERLOOKED DETERMINANT THAT GOVERNS THE EFFECTS OF LIPIDS ON AGEING. FURTHER RESEARCH USING INTEGRATIVE APPROACHES AMIDST THE KNOWN AGING HALLMARKS IS HIGHLY DESIRABLE FOR UNDERSTANDING THE THERAPEUTICS OF LIPIDS ASSOCIATED WITH AGEING. 2023 14 5765 33 SOURCE OF CHRONIC INFLAMMATION IN AGING. AGING IS A COMPLEX PROCESS THAT RESULTS FROM A COMBINATION OF ENVIRONMENTAL, GENETIC, AND EPIGENETIC FACTORS. A CHRONIC PRO-INFLAMMATORY STATUS IS A PERVASIVE FEATURE OF AGING. THIS CHRONIC LOW-GRADE INFLAMMATION OCCURRING IN THE ABSENCE OF OVERT INFECTION HAS BEEN DEFINED AS "INFLAMMAGING" AND REPRESENTS A SIGNIFICANT RISK FACTOR FOR MORBIDITY AND MORTALITY IN THE ELDERLY. THE LOW-GRADE INFLAMMATION PERSISTS EVEN AFTER REVERSING PRO-INFLAMMATORY STIMULI SUCH AS LDL CHOLESTEROL AND THE RENIN-ANGIOTENSIN SYSTEM (RAS). RECENTLY, SEVERAL POSSIBLE SOURCES OF CHRONIC LOW-GRADE INFLAMMATION OBSERVED DURING AGING AND AGE-RELATED DISEASES HAVE BEEN PROPOSED. CELL SENESCENCE AND DYSREGULATION OF INNATE IMMUNITY IS ONE SUCH MECHANISM BY WHICH PERSISTENT PROLONGED INFLAMMATION OCCURS EVEN AFTER THE INITIAL STIMULUS HAS BEEN REMOVED. ADDITIONALLY, THE COAGULATION FACTOR THAT ACTIVATES INFLAMMATORY SIGNALING BEYOND ITS ROLE IN THE COAGULATION SYSTEM HAS BEEN IDENTIFIED. THIS SIGNAL COULD BE A NEW SOURCE OF CHRONIC INFLAMMATION AND CELL SENESCENCE. HERE, WE SUMMARIZED THE FACTORS AND CELLULAR PATHWAYS/PROCESSES THAT ARE KNOWN TO REGULATE LOW-GRADE PERSISTENT INFLAMMATION IN AGING AND AGE-RELATED DISEASE. 2018 15 5558 20 ROLE OF GUT MICROBIOTA IN THE AETIOLOGY OF OBESITY: PROPOSED MECHANISMS AND REVIEW OF THE LITERATURE. THE AETIOLOGY OF OBESITY HAS BEEN ATTRIBUTED TO SEVERAL FACTORS (ENVIRONMENTAL, DIETARY, LIFESTYLE, HOST, AND GENETIC FACTORS); HOWEVER NONE OF THESE FULLY EXPLAIN THE INCREASE IN THE PREVALENCE OF OBESITY WORLDWIDE. GUT MICROBIOTA LOCATED AT THE INTERFACE OF HOST AND ENVIRONMENT IN THE GUT ARE A NEW AREA OF RESEARCH BEING EXPLORED TO EXPLAIN THE EXCESS ACCUMULATION OF ENERGY IN OBESE INDIVIDUALS AND MAY BE A POTENTIAL TARGET FOR THERAPEUTIC MANIPULATION TO REDUCE HOST ENERGY STORAGE. SEVERAL MECHANISMS HAVE BEEN SUGGESTED TO EXPLAIN THE ROLE OF GUT MICROBIOTA IN THE AETIOLOGY OF OBESITY SUCH AS SHORT CHAIN FATTY ACID PRODUCTION, STIMULATION OF HORMONES, CHRONIC LOW-GRADE INFLAMMATION, LIPOPROTEIN AND BILE ACID METABOLISM, AND INCREASED ENDOCANNABINOID RECEPTOR SYSTEM TONE. HOWEVER, EVIDENCE FROM ANIMAL AND HUMAN STUDIES CLEARLY INDICATES CONTROVERSIES IN DETERMINING THE CAUSE OR EFFECT RELATIONSHIP BETWEEN THE GUT MICROBIOTA AND OBESITY. METAGENOMICS BASED STUDIES INDICATE THAT FUNCTIONALITY RATHER THAN THE COMPOSITION OF GUT MICROBIOTA MAY BE IMPORTANT. FURTHER MECHANISTIC STUDIES CONTROLLING FOR ENVIRONMENTAL AND EPIGENETIC FACTORS ARE THEREFORE REQUIRED TO HELP UNRAVEL OBESITY PATHOGENESIS. 2016 16 1175 27 CONTRIBUTIONS OF AGE-RELATED THYMIC INVOLUTION TO IMMUNOSENESCENCE AND INFLAMMAGING. IMMUNE SYSTEM AGING IS CHARACTERIZED BY THE PARADOX OF IMMUNOSENESCENCE (INSUFFICIENCY) AND INFLAMMAGING (OVER-REACTION), WHICH INCORPORATE TWO SIDES OF THE SAME COIN, RESULTING IN IMMUNE DISORDER. IMMUNOSENESCENCE REFERS TO DISRUPTION IN THE STRUCTURAL ARCHITECTURE OF IMMUNE ORGANS AND DYSFUNCTION IN IMMUNE RESPONSES, RESULTING FROM BOTH AGED INNATE AND ADAPTIVE IMMUNITY. INFLAMMAGING, DESCRIBED AS A CHRONIC, STERILE, SYSTEMIC INFLAMMATORY CONDITION ASSOCIATED WITH ADVANCED AGE, IS MAINLY ATTRIBUTED TO SOMATIC CELLULAR SENESCENCE-ASSOCIATED SECRETORY PHENOTYPE (SASP) AND AGE-RELATED AUTOIMMUNE PREDISPOSITION. HOWEVER, THE INABILITY TO REDUCE SENESCENT SOMATIC CELLS (SSCS), BECAUSE OF IMMUNOSENESCENCE, EXACERBATES INFLAMMAGING. AGE-RELATED ADAPTIVE IMMUNE SYSTEM DEVIATIONS, PARTICULARLY ALTERED T CELL FUNCTION, ARE DERIVED FROM AGE-RELATED THYMIC ATROPHY OR INVOLUTION, A HALLMARK OF THYMIC AGING. RECENTLY, THERE HAVE BEEN MAJOR DEVELOPMENTS IN UNDERSTANDING HOW AGE-RELATED THYMIC INVOLUTION CONTRIBUTES TO INFLAMMAGING AND IMMUNOSENESCENCE AT THE CELLULAR AND MOLECULAR LEVELS, INCLUDING GENETIC AND EPIGENETIC REGULATION, AS WELL AS DEVELOPMENTS OF MANY POTENTIAL REJUVENATION STRATEGIES. HEREIN, WE DISCUSS THE RESEARCH PROGRESS UNCOVERING HOW AGE-RELATED THYMIC INVOLUTION CONTRIBUTES TO IMMUNOSENESCENCE AND INFLAMMAGING, AS WELL AS THEIR INTERSECTION. WE ALSO DESCRIBE HOW T CELL ADAPTIVE IMMUNITY MEDIATES INFLAMMAGING AND PLAYS A CRUCIAL ROLE IN THE PROGRESSION OF AGE-RELATED NEUROLOGICAL AND CARDIOVASCULAR DISEASES, AS WELL AS CANCER. WE THEN BRIEFLY OUTLINE THE UNDERLYING CELLULAR AND MOLECULAR MECHANISMS OF AGE-RELATED THYMIC INVOLUTION, AND FINALLY SUMMARIZE POTENTIAL REJUVENATION STRATEGIES TO RESTORE AGED THYMIC FUNCTION. 2020 17 3408 29 HOW WESTERN DIET AND LIFESTYLE DRIVE THE PANDEMIC OF OBESITY AND CIVILIZATION DISEASES. WESTERNIZED POPULATIONS ARE PLAGUED BY A PLETHORA OF CHRONIC NON-INFECTIOUS DEGENERATIVE DISEASES, TERMED AS "CIVILIZATION DISEASES", LIKE OBESITY, DIABETES, CARDIOVASCULAR DISEASES, CANCER, AUTOIMMUNE DISEASES, ALZHEIMER'S DISEASE AND MANY MORE, DISEASES WHICH ARE RARE OR VIRTUALLY ABSENT IN HUNTER-GATHERERS AND OTHER NON-WESTERNIZED POPULATIONS. THERE IS A GROWING AWARENESS THAT THE CAUSE OF THIS AMAZING DISCREPANCY LIES IN THE PROFOUND CHANGES IN DIET AND LIFESTYLE DURING RECENT HUMAN HISTORY. THIS PAPER SHOWS THAT THE TRANSITION FROM PALEOLITHIC NUTRITION TO WESTERN DIETS, ALONG WITH LACK OF CORRESPONDING GENETIC ADAPTATIONS, CAUSE SIGNIFICANT DISTORTIONS OF THE FINE-TUNED METABOLISM THAT HAS EVOLVED OVER MILLIONS OF YEARS OF HUMAN EVOLUTION IN ADAPTATION TO PALEOLITHIC DIETS. WITH THE INCREASING SPREAD OF WESTERN DIET AND LIFESTYLE WORLDWIDE, OVERWEIGHT AND CIVILIZATION DISEASES ARE ALSO RAPIDLY INCREASING IN DEVELOPING COUNTRIES. IT IS SUGGESTED THAT THE DIET-RELATED KEY CHANGES IN THE DEVELOPMENTAL PROCESS INCLUDE AN INCREASED PRODUCTION OF REACTIVE OXYGEN SPECIES AND OXIDATIVE STRESS, DEVELOPMENT OF HYPERINSULINEMIA AND INSULIN RESISTANCE, LOW-GRADE INFLAMMATION AND AN ABNORMAL ACTIVATION OF THE SYMPATHETIC NERVOUS SYSTEM AND THE RENIN-ANGIOTENSIN SYSTEM, ALL OF WHICH PLAY PIVOTAL ROLES IN THE DEVELOPMENT OF DISEASES OF CIVILIZATION. IN ADDITION, DIET-RELATED EPIGENETIC CHANGES AND FETAL PROGRAMMING PLAY AN IMPORTANT ROLE. THE SUGGESTED PATHOMECHANISM IS ALSO ABLE TO EXPLAIN THE WELL-KNOWN BUT NOT COMPLETELY UNDERSTOOD CLOSE RELATIONSHIP BETWEEN OBESITY AND THE WIDE RANGE OF COMORBIDITIES, LIKE TYPE 2 DIABETES MELLITUS, CARDIOVASCULAR DISEASE, ETC., AS DISEASES OF THE SAME ETIOPATHOLOGY. CHANGING OUR LIFESTYLE IN ACCORDANCE WITH OUR GENETIC MAKEUP, INCLUDING DIET AND PHYSICAL ACTIVITY, MAY HELP PREVENT OR LIMIT THE DEVELOPMENT OF THESE DISEASES. 2019 18 6165 25 THE GLOBAL DIABETES EPIDEMIC AS A CONSEQUENCE OF LIFESTYLE-INDUCED LOW-GRADE INFLAMMATION. THE RECENT MAJOR INCREASE IN THE GLOBAL INCIDENCE OF TYPE 2 DIABETES SUGGESTS THAT MOST CASES OF THIS DISEASE ARE CAUSED BY CHANGES IN ENVIRONMENT AND LIFESTYLE. ALL MAJOR RISK FACTORS FOR TYPE 2 DIABETES (OVERNUTRITION, LOW DIETARY FIBRE, SEDENTARY LIFESTYLE, SLEEP DEPRIVATION AND DEPRESSION) HAVE BEEN FOUND TO INDUCE LOCAL OR SYSTEMIC LOW-GRADE INFLAMMATION THAT IS USUALLY TRANSIENT OR MILDER IN INDIVIDUALS NOT AT RISK FOR TYPE 2 DIABETES. BY CONTRAST, INFLAMMATORY RESPONSES TO LIFESTYLE FACTORS ARE MORE PRONOUNCED AND PROLONGED IN INDIVIDUALS AT RISK OF TYPE 2 DIABETES AND APPEAR TO OCCUR ALSO IN THE PANCREATIC ISLETS. CHRONIC LOW-GRADE INFLAMMATION WILL EVENTUALLY LEAD TO OVERT DIABETES IF COUNTER-REGULATORY CIRCUITS TO INFLAMMATION AND METABOLIC STRESS ARE COMPROMISED BECAUSE OF A GENETIC AND/OR EPIGENETIC PREDISPOSITION. HENCE, IT IS NOT THE LIFESTYLE CHANGE PER SE BUT A DEFICIENT COUNTER-REGULATORY RESPONSE IN PREDISPOSED INDIVIDUALS WHICH IS CRUCIAL TO DISEASE PATHOGENESIS. NOVEL APPROACHES OF INTERVENTION MAY TARGET THESE DEFICIENT DEFENCE MECHANISMS. 2010 19 3684 24 INFLAMMATION, PHYSICAL ACTIVITY, AND CHRONIC DISEASE: AN EVOLUTIONARY PERSPECTIVE. LOW-GRADE INFLAMMATION IS EMERGING AS A COMMON FEATURE OF CONTEMPORARY METABOLIC, PSYCHIATRIC, AND NEURODEGENERATIVE DISEASES. BOTH PHYSICAL INACTIVITY AND ABDOMINAL ADIPOSITY ARE ASSOCIATED WITH PERSISTENT SYSTEMIC LOW-GRADE INFLAMMATION. THUS, THE BEHAVIORAL, BIOLOGICAL, AND PHYSIOLOGICAL CHANGES THAT CAUSE A PREDISPOSITION TO OBESITY AND OTHER CO-MORBIDITIES COULD HAVE EPIGENETIC UNDERPINNINGS IN ADDITION TO VARIOUS EVOLUTIONARY SCENARIOS. A KEY ASSUMPTION INVOLVES THE POTENTIAL FOR A MISMATCH BETWEEN THE HUMAN GENOME MOLDED OVER GENERATIONS, AND THE ISSUE OF ADAPTING TO THE MODERN HIGH CALORIE DIET AND COMMON BUILT ENVIRONMENTS PROMOTING INACTIVITY. THIS BIOLOGICAL MISMATCH APPEARS TO HAVE DIRE HEALTH CONSEQUENCES. THEREFORE, THE GOAL OF THIS ARTICLE IS TO PROVIDE A BRIEF OVERVIEW ON THE IMPORTANCE OF INFLAMMATION AS PART OF HUMAN SURVIVAL AND HOW PHYSICAL ACTIVITY (PA) AND PHYSICAL INACTIVITY ARE CRITICAL REGULATORS OF SYSTEMIC INFLAMMATION. THE REVIEW WILL HIGHLIGHT ANTI-INFLAMMATORY EFFECTS OF PA AND EXERCISE TRAINING FROM A METABOLIC AND SYSTEMIC SIGNALING PERSPECTIVE, WHICH INCLUDES SKELETAL MUSCLE TO UTILIZATION OF FATTY ACIDS, TLR4 SIGNALING, AND MYOKINE/ADIPOKINE EFFECTS. THE AVAILABLE EVIDENCE SUGGESTS THAT PA, REGULAR EXERCISE, AND WEIGHT LOSS OFFER BOTH PROTECTION AGAINST AND TREATMENT FOR A WIDE VARIETY OF CHRONIC DISEASES ASSOCIATED WITH LOW-GRADE INFLAMMATION THROUGH AN IMPROVED INFLAMMATORY PROFILE. 2020 20 44 25 A COMPREHENSIVE REVIEW ON HIGH -FAT DIET-INDUCED DIABETES MELLITUS: AN EPIGENETIC VIEW. MODERN LIFESTYLE, GENETICS, NUTRITIONAL OVERLOAD THROUGH HIGH-FAT DIET ATTRIBUTED PREVALENCE AND DIABETES OUTCOMES WITH VARIOUS COMPLICATIONS PRIMARILY DUE TO OBESITY IN WHICH ENERGY-DENSE DIETS FREQUENTLY AFFECT METABOLIC HEALTH. ONE POSSIBLE ISSUE USUALLY ASSOCIATED WITH ELEVATED CHRONIC FAT INTAKE IS INSULIN RESISTANCE, AND HYPERGLYCEMIA CONSTITUTES AN IMPORTANT FUNCTION IN ALTERING THE CARBOHYDRATES AND LIPIDS METABOLISM. SIMILARLY, IN ASSESSING HUMAN SUSCEPTIBILITY TO WEIGHT GAIN AND OBESITY, GENETIC VARIATIONS PLAY A CENTRAL ROLE, CONTRIBUTING TO KEEN INTEREST IN IDENTIFYING THE POSSIBLE ROLE OF EPIGENETICS AS A MEDIATOR OF GENE-ENVIRONMENTAL INTERACTIONS INFLUENCING THE PRODUCTION OF TYPE 2 DIABETES MELLITUS AND ITS RELATED CONCERNS. EPIGENETIC MODIFICATIONS ASSOCIATED WITH THE ACCEPTANCE OF A SEDENTARY LIFESTYLE AND ENVIRONMENTAL STRESS FACTORS IN RESPONSE TO ENERGY INTAKE AND EXPENDITURE IMBALANCES COMPLEMENT GENETIC ALTERATIONS AND LEAD TO THE PRODUCTION AND ADVANCEMENT OF METABOLIC DISORDERS SUCH AS DIABETES AND OBESITY. METHYLATION OF DNA, HISTONE MODIFICATIONS, AND INCREASES IN THE EXPRESSION OF NON-CODING RNAS CAN RESULT IN REDUCED TRANSCRIPTIONAL ACTIVITY OF KEY BETA-CELL GENES THUS CREATING INSULIN RESISTANCE. EPIGENETICS CONTRIBUTE TO CHANGES IN THE EXPRESSION OF THE UNDERLYING INSULIN RESISTANCE AND INSUFFICIENCY GENE NETWORKS, ALONG WITH LOW-GRADE OBESITY-RELATED INFLAMMATION, INCREASED ROS GENERATION, AND DNA DAMAGE IN MULTIORGANS. THIS REVIEW FOCUSED ON EPIGENETIC MECHANISMS AND METABOLIC REGULATIONS ASSOCIATED WITH HIGH-FAT DIET (HFD)-INDUCED DIABETES MELLITUS. 2022