1 1367 92 DEVELOPMENTAL ORIGINS OF CHRONIC PHYSICAL AGGRESSION: A BIO-PSYCHO-SOCIAL MODEL FOR THE NEXT GENERATION OF PREVENTIVE INTERVENTIONS. THIS REVIEW DESCRIBES A BIO-PSYCHO-SOCIAL APPROACH TO UNDERSTANDING AND PREVENTING THE DEVELOPMENT OF CHRONIC PHYSICAL AGGRESSION. THE DEBATE ON THE DEVELOPMENTAL ORIGINS OF AGGRESSION HAS HISTORICALLY OPPOSED GENETIC AND ENVIRONMENTAL MECHANISMS. RECENT STUDIES HAVE SHOWN THAT THE FREQUENCY OF PHYSICAL AGGRESSION PEAKS IN EARLY CHILDHOOD AND THEN DECREASES UNTIL OLD AGE. MOLECULAR GENETIC STUDIES AND TWIN STUDIES HAVE CONFIRMED IMPORTANT GENETIC INFLUENCES. HOWEVER, RECENT EPIGENETIC STUDIES HAVE HIGHLIGHTED THE IMPORTANT ROLE OF ENVIRONMENTS IN GENE EXPRESSION AND BRAIN DEVELOPMENT. THESE STUDIES SUGGEST THAT INTERRELATED BIO-PSYCHO-SOCIAL CHANNELS INVOLVED IN THE DEVELOPMENT OF CHRONIC PHYSICAL AGGRESSION ARE GENERALLY THE PRODUCT OF AN INTERGENERATIONAL TRANSMISSION PROCESS OCCURRING THROUGH ASSORTATIVE MATING, GENETIC INHERITANCE, AND THE INHERITANCE OF PHYSICAL AND SOCIAL ENVIRONMENTAL CONDITIONS THAT HANDICAP BRAIN FUNCTIONING AND SUPPORT THE USE OF PHYSICAL AGGRESSION TO SOLVE PROBLEMS. GIVEN THESE INTERGENERATIONAL MECHANISMS AND PHYSICAL AGGRESSION ONSET IN INFANCY, IT APPEARS CLEAR THAT PREVENTIVE INTERVENTIONS SHOULD START EARLY IN PREGNANCY, AT THE LATEST. 2018 2 5650 38 SEX DIFFERENCES IN THE DEVELOPMENT OF PHYSICAL AGGRESSION: AN INTERGENERATIONAL PERSPECTIVE AND IMPLICATIONS FOR PREVENTIVE INTERVENTIONS. THIS ARTICLE REVIEWS THE STATE OF KNOWLEDGE ON THE DEVELOPMENT OF CHRONIC PHYSICAL AGGRESSION (CPA), WITH THE AIM OF IDENTIFYING THE MOST EFFECTIVE PREVENTION STRATEGIES. WE SPECIFICALLY FOCUS ON THE EARLY DEVELOPMENT OF PHYSICAL AGGRESSION, ON SEX DIFFERENCES IN THE USE OF PHYSICAL AGGRESSION, AND ON THE TRANSMISSION OF BEHAVIOR PROBLEMS FROM ONE GENERATION TO THE OTHER. THE BODY OF RESEARCH ON THE DEVELOPMENT OF CPA FROM THE PAST THREE DECADES THAT WE REVIEW SHOWS INCREASING EVIDENCE THAT ITS PREVENTION REQUIRES A LONG-TERM BIOPSYCHOSOCIAL DEVELOPMENTAL APPROACH WHICH ALSO MUST INCLUDE AN INTERGENERATIONAL PERSPECTIVE. RECENT GENETIC AND EPIGENETIC RESEARCH HAS INDICATED THAT THERE ARE BOTH IMPORTANT GENETIC AND ENVIRONMENTAL EFFECTS ON GENE EXPRESSION WHICH START AT CONCEPTION. WE CONCLUDE THAT ONE OF THE MOST EFFECTIVE STRATEGIES TO BREAK THE INTERGENERATIONAL TRANSMISSION OF CPA INVOLVES GIVING LONG-TERM SUPPORT TO PREGNANT WOMEN WITH A HISTORY OF BEHAVIOR PROBLEMS, THEIR SPOUSE, AND THEIR OFFSPRING. 2019 3 1766 27 EARLY-LIFE EXPERIENCES AND THE DEVELOPMENT OF ADULT DISEASES WITH A FOCUS ON MENTAL ILLNESS: THE HUMAN BIRTH THEORY. IN MAMMALS, EARLY ADVERSE EXPERIENCES, INCLUDING MOTHER-PUP INTERACTIONS, SHAPE THE RESPONSE OF AN INDIVIDUAL TO CHRONIC STRESS OR TO STRESS-RELATED DISEASES DURING ADULT LIFE. THIS HAS LED TO THE ELABORATION OF THE THEORY OF THE DEVELOPMENTAL ORIGINS OF HEALTH AND DISEASE, IN PARTICULAR ADULT DISEASES SUCH AS CARDIOVASCULAR AND METABOLIC DISORDERS. IN ADDITION, IN HUMANS, AS STATED BY MASSIMO FAGIOLI'S HUMAN BIRTH THEORY, BIRTH IS HEALTHY AND EQUAL FOR ALL INDIVIDUALS, SO THAT MENTAL ILLNESS DEVELOP EXCLUSIVELY IN THE POSTNATAL PERIOD BECAUSE OF THE QUALITY OF THE RELATIONSHIP IN THE FIRST YEAR OF LIFE. THUS, THIS REVIEW FOCUSES ON THE IMPORTANCE OF PROGRAMMING DURING THE EARLY DEVELOPMENTAL PERIOD ON THE MANIFESTATION OF ADULT DISEASES IN BOTH ANIMAL MODELS AND HUMANS. CONSIDERING THE OBVIOUS DIFFERENCES BETWEEN ANIMALS AND HUMANS WE CANNOT SYSTEMATICALLY MOVE FROM ANIMAL MODELS TO HUMANS. CONSEQUENTLY, IN THE FIRST PART OF THIS REVIEW, WE WILL DISCUSS HOW ANIMAL MODELS CAN BE USED TO DISSECT THE INFLUENCE OF ADVERSE EVENTS OCCURRING DURING THE PRENATAL AND POSTNATAL PERIODS ON THE DEVELOPMENTAL TRAJECTORIES OF THE OFFSPRING, AND IN THE SECOND PART, WE WILL DISCUSS THE ROLE OF POSTNATAL CRITICAL PERIODS ON THE DEVELOPMENT OF MENTAL DISEASES IN HUMANS. EPIGENETIC MECHANISMS THAT CAUSE REVERSIBLE MODIFICATIONS IN GENE EXPRESSION, DRIVING THE DEVELOPMENT OF A PATHOLOGICAL PHENOTYPE IN RESPONSE TO A NEGATIVE EARLY POSTNATAL ENVIRONMENT, MAY LIE AT THE CORE OF THIS PROGRAMMING, THEREBY PROVIDING POTENTIAL NEW THERAPEUTIC TARGETS. THE CONCEPT OF THE HUMAN BIRTH THEORY LEADS TO A COMPREHENSION OF THE MENTAL ILLNESS AS A PATHOLOGY OF THE HUMAN RELATIONSHIP IMMEDIATELY AFTER BIRTH AND DURING THE FIRST YEAR OF LIFE. 2017 4 4996 29 PERINATAL EPIGENETIC DETERMINANTS OF COGNITIVE AND METABOLIC DISORDERS. MULTIPLE CUES FROM THE ENVIRONMENT OF OUR INDIRECT AND IMMEDIATE ANCESTORS, WHICH OFTEN PERSIST THROUGHOUT THE PRENATAL PERIOD AND ADULTHOOD, ARE SHAPING OUR PHENOTYPES THROUGH EITHER DIRECT, PARENT-TO-CHILD INFLUENCES, OR TRANSGENERATIONAL INHERITANCE. THESE EFFECTS ARE DUE TO GENE-ENVIRONMENT INTERACTIONS, WHICH ARE INTENDED TO BE A PREDICTIVE TOOL AND A MECHANISM OF QUICK ADAPTATION TO THE ENVIRONMENT, AS COMPARED WITH GENETIC VARIATIONS THAT ARE INHERITED OVER MANY GENERATIONS. IN CERTAIN CIRCUMSTANCES THE INFLUENCES INDUCED BY THE GENE-ENVIRONMENT INTERACTIONS CAN HAVE DELETERIOUS EFFECTS UPON THE HEALTH STATUS, IN THE CONTEXT OF A RADICAL CHANGE IN THE ENVIRONMENT THAT DOES NOT FIT WITH THE PREDICTED CONDITIONS, VIA EPIGENETIC ALTERATIONS. CONVERSELY THE BEST FIT TO THE EXPECTED ENVIRONMENT MIGHT HAVE A DELAYED AGING PROCESS AND A LONGER LIFE SPAN. THIS REVIEW WILL TOUCH UPON THE DEVELOPMENTAL ORIGINS OF HEALTH AND DISEASE (DOHAD) CONCEPT, WHILE DISCUSSING RECENT ADVANCES IN THE UNDERSTANDING OF METABOLIC AND COGNITIVE DISRUPTIONS, WITH A FOCUS ON EPIGENETIC FACTORS, THEIR TRANSGENERATIONAL EFFECTS, AND THE CONSEQUENCES THEY MIGHT HAVE UPON THE ONSET OF CHRONIC DISEASE AND PREMATURE EXITUS. 2012 5 6844 28 [METABOLIC PROGRAMMING: THEORETICAL CONCEPTS AND EXPERIMENTAL EVIDENCE]. IT IS KNOWN THAT THE POOR NUTRITION DURING A FETAL DEVELOPMENT MAY CONTRIBUTE TO AN INCREASED RISK OF CHRONIC DISEASES IN ADULTHOOD. IN A MODERN LITERATURE, THIS PHENOMENON IS CALLED <>. IT IS ASSUMED THAT THE QUALITATIVE OR QUANTITATIVE DEFICIENCY OF CERTAIN NUTRITIONAL COMPONENTS DURING AN EARLY DEVELOPMENT MAY LEAD TO THE ADAPTATIONS THAT CONTRIBUTE TO IMPROVED SURVIVAL DURING THE PRENATAL AND EARLY POSTNATAL PERIODS OF AN ONTOGENESIS. HOWEVER, THE CONSEQUENCE OF SUCH ADAPTIVE CHANGES MAY ALSO BE THE DEVELOPMENT OF VARIOUS PATHOLOGICAL PROCESSES AT THE LATER STAGES OF LIFE. RECENT STUDIES HAVE SHOWN THAT ONE OF THE MAJOR MECHANISMS INVOLVED IN THESE ADAPTATIONS IS THE EPIGENETIC REGULATION OF A GENE ACTIVITY. IN THIS REVIEW, THE EXPERIMENTAL EVIDENCE IS PROVIDED THAT PROCESSES ARISING FROM A QUANTITATIVELY OR QUALITATIVELY RESTRICTED DIET DURING THE EARLY STAGES OF DEVELOPMENT PLAY AN IMPORTANT ROLE IN THE FURTHER LIFE AND CAN GREATLY INFLUENCE RISK OF VARIOUS AGE-RELATED DISEASES AND LIFE SPAN. 2013 6 4802 32 OBESITY AND LIFESPAN HEALTH--IMPORTANCE OF THE FETAL ENVIRONMENT. A MARKED INCREASE IN THE FREQUENCY OF OBESITY AT THE POPULATION LEVEL HAS RESULTED IN AN INCREASING NUMBER OF OBESE WOMEN ENTERING PREGNANCY. THE INCREASING REALIZATION OF THE IMPORTANCE OF THE FETAL ENVIRONMENT IN RELATION TO CHRONIC DISEASE ACROSS THE LIFESPAN HAS FOCUSED ATTENTION ON THE ROLE OF MATERNAL OBESITY IN FETAL DEVELOPMENT. PREVIOUS STUDIES HAVE DEMONSTRATED THAT OBESITY DURING ADOLESCENCE AND ADULTHOOD CAN BE TRACED BACK TO FETAL AND EARLY CHILDHOOD EXPOSURES. THIS REVIEW FOCUSES ON FACTORS THAT CONTRIBUTE TO EARLY DEVELOPMENTAL EVENTS, SUCH AS EPIGENETIC MODIFICATIONS, THE POTENTIAL FOR AN INCREASE IN INFLAMMATORY BURDEN, EARLY DEVELOPMENTAL PROGRAMMING CHANGES SUCH AS THE VARIABLE DEVELOPMENT OF WHITE VERSUS BROWN ADIPOSE TISSUE, AND ALTERATIONS IN ORGAN ONTOGENY. WE HYPOTHESIZE THAT THESE MECHANISMS PROMOTE AN UNFAVORABLE FETAL ENVIRONMENT AND CAN HAVE A LONG-STANDING IMPACT, WITH EARLY MANIFESTATIONS OF CHRONIC DISEASE THAT CAN RESULT IN AN INCREASED DEMAND FOR FUTURE HEALTH CARE. IN ORDER TO IDENTIFY APPROPRIATE PREVENTIVE MEASURES, ATTENTION NEEDS TO BE PLACED BOTH ON REDUCING MATERNAL OBESITY AS WELL AS UNDERSTANDING THE MOLECULAR, CELLULAR, AND EPIGENETIC MECHANISMS THAT MAY BE RESPONSIBLE FOR THE PRENATAL ONSET OF CHRONIC DISEASE. 2014 7 2049 24 EPIGENETIC CODE AND POTENTIAL EPIGENETIC-BASED THERAPIES AGAINST CHRONIC DISEASES IN DEVELOPMENTAL ORIGINS. ACCUMULATED FINDINGS HAVE DEMONSTRATED THAT THE EPIGENETIC CODE PROVIDES A POTENTIAL LINK BETWEEN PRENATAL STRESS AND CHANGES IN GENE EXPRESSION THAT COULD BE INVOLVED IN THE DEVELOPMENTAL PROGRAMMING OF VARIOUS CHRONIC DISEASES IN LATER LIFE. MEANWHILE, BASED ON THE FACT THAT EPIGENETIC MODIFICATIONS ARE REVERSIBLE AND CAN BE MANIPULATED, THIS PROVIDES A UNIQUE CHANCE TO DEVELOP MULTIPLE NOVEL EPIGENETIC-BASED THERAPEUTIC STRATEGIES AGAINST MANY CHRONIC DISEASES IN EARLY DEVELOPMENTAL PERIODS. THIS ARTICLE WILL GIVE A SHORT REVIEW OF RECENT FINDINGS OF PRENATAL INSULT-INDUCED EPIGENETIC CHANGES IN DEVELOPMENTAL ORIGINS OF SEVERAL CHRONIC DISEASES, AND WILL ATTEMPT TO PROVIDE AN OVERVIEW OF THE CURRENT EPIGENETIC-BASED STRATEGIES APPLIED IN THE EARLY PREVENTION, DIAGNOSIS AND POSSIBLE THERAPIES FOR HUMAN CHRONIC DISEASES. 2014 8 1453 22 DISCOVERING HOW ENVIRONMENTAL EXPOSURES ALTER GENES COULD LEAD TO NEW TREATMENTS FOR CHRONIC ILLNESSES. EMERGING RESEARCH DEMONSTRATES THAT DIET, POLLUTION, AND OTHER ENVIRONMENTAL TRIGGERS CAN ALTER BOTH THE FUNCTION AND EXPRESSION OF HUMAN GENES AND LEAD TO A HEIGHTENED DISEASE RISK. THESE ENVIRONMENT-GENE INTERACTIONS CAN CAUSE SO-CALLED EPIGENETIC CHANGES IN GENE EXPRESSION-PATTERNS OF WHICH GENES ARE SWITCHED "ON" OR "OFF"-THAT MAY ACCOUNT FOR THE RISING MORTALITY FROM CHRONIC DISEASES IN INDUSTRIALIZED NATIONS. IN THIS PAPER, WE CALL FOR A NEW TRANSDISCIPLINARY APPROACH TO PUBLIC HEALTH THAT WOULD EXAMINE HOW ENVIRONMENTAL EXPOSURES, BOTH PHYSICAL AND SOCIAL, INFLUENCE GENE EXPRESSION AND A PERSON'S SUSCEPTIBILITY TO CHRONIC DISEASE. THIS INITIATIVE COULD LEAD TO NEW WAYS TO PREVENT AND TREAT SUCH ILLNESSES. 2011 9 1938 28 EPIDEMIOLOGIC EVIDENCE FOR ASSOCIATION BETWEEN ADVERSE ENVIRONMENTAL EXPOSURES IN EARLY LIFE AND EPIGENETIC VARIATION: A POTENTIAL LINK TO DISEASE SUSCEPTIBILITY? A GROWING BODY OF EVIDENCE SUGGESTS THAT THE RISK OF DEVELOPMENT AND PROGRESSION OF A VARIETY OF HUMAN CHRONIC DISEASES DEPENDS ON EPIGENETIC MODIFICATIONS TRIGGERED BY ENVIRONMENTAL CUES DURING EARLY LIFE SENSITIVE STAGES. EXPOSURES TO ENVIRONMENTAL FACTORS SUCH AS ADVERSE NUTRITIONAL, PSYCHOLOGICAL, AND SOCIAL CONDITIONS, AS WELL AS POLLUTANTS AND SUBSTANCE ABUSE IN EARLY LIFE, HAVE BEEN SHOWN TO BE IMPORTANT DETERMINANTS OF EPIGENETIC PROGRAMMING OF CHRONIC PATHOLOGICAL CONDITIONS IN HUMAN POPULATIONS. OVER THE PAST YEARS, IT HAS BECOME INCREASINGLY CLEAR DUE TO THE EPIGENOME-WIDE ASSOCIATION STUDIES (EWASS) THAT EARLY LIFE ADVERSE ENVIRONMENTAL EVENTS MAY TRIGGER WIDESPREAD AND PERSISTENT ALTERATIONS IN TRANSCRIPTIONAL PROFILING. SEVERAL CANDIDATE GENES HAVE BEEN IDENTIFIED UNDERLYING THESE ASSOCIATIONS. IN THIS CONTEXT, DNA METHYLATION IS THE MOST INTENSIVELY STUDIED EPIGENETIC PHENOMENON. IN THIS REVIEW, THE CLINICAL AND EPIDEMIOLOGICAL EVIDENCE FOR THE ROLE OF EPIGENETIC FACTORS IN MEDIATING THE LINK BETWEEN EARLY LIFE EXPERIENCES AND LONG-TERM HEALTH OUTCOMES ARE SUMMARIZED. 2015 10 2103 29 EPIGENETIC EPIDEMIOLOGY OF THE DEVELOPMENTAL ORIGINS HYPOTHESIS. EXTENSIVE HUMAN EPIDEMIOLOGIC AND ANIMAL MODEL DATA INDICATE THAT DURING CRITICAL PERIODS OF PRENATAL AND POSTNATAL MAMMALIAN DEVELOPMENT, NUTRITION AND OTHER ENVIRONMENTAL STIMULI INFLUENCE DEVELOPMENTAL PATHWAYS AND THEREBY INDUCE PERMANENT CHANGES IN METABOLISM AND CHRONIC DISEASE SUSCEPTIBILITY. THE BIOLOGIC MECHANISMS UNDERLYING THIS "DEVELOPMENTAL ORIGINS HYPOTHESIS" ARE POORLY UNDERSTOOD. THIS REVIEW FOCUSES ON THE LIKELY INVOLVEMENT OF EPIGENETIC MECHANISMS IN THE DEVELOPMENTAL ORIGINS OF HEALTH AND DISEASE (DOHAD). WE DESCRIBE PERMANENT EFFECTS OF TRANSIENT ENVIRONMENTAL INFLUENCES ON THE DEVELOPMENTAL ESTABLISHMENT OF EPIGENETIC GENE REGULATION AND EVIDENCE LINKING EPIGENETIC DYSREGULATION WITH HUMAN DISEASE. WE PROPOSE A DEFINITION OF "EPIGENETIC EPIDEMIOLOGY" AND DELINEATE HOW THIS EMERGING FIELD PROVIDES A BASIS FROM WHICH TO EXPLORE THE ROLE OF EPIGENETIC MECHANISMS IN DOHAD. WE SUGGEST STRATEGIES FOR FUTURE HUMAN EPIDEMIOLOGIC STUDIES TO IDENTIFY CAUSAL ASSOCIATIONS BETWEEN EARLY EXPOSURES, LONG-TERM CHANGES IN EPIGENETIC REGULATION, AND DISEASE, WHICH MAY ULTIMATELY ENABLE SPECIFIC EARLY-LIFE INTERVENTIONS TO IMPROVE HUMAN HEALTH. 2007 11 34 23 A CHILD'S NUTRITION AND EPIGENETICS. STUDIES HAVE SHOWN A DRAMATIC INCREASE IN THE INCIDENCE AND THE PREVALENCE OF CHRONIC DISEASES SUCH AS TYPE 2 DIABETES MELLITUS AND CARDIOVASCULAR DISORDERS OVER THE LAST SEVERAL DECADES. ENVIRONMENTAL TRIGGERS AND NUTRITION ARE CONSIDERED MAJOR CONTRIBUTORS TO THIS INCREASE. THE FIRST 1,000 DAYS OF LIFE, WHICH IS THE PERIOD BETWEEN CONCEPTION AND THE FIRST 2 YEARS OF AGE, IS CONSIDERED THE TIME FOR ENVIRONMENTAL FACTORS, SUCH AS NUTRITION, TO EXERT THEIR POSITIVE AND MOST CRUCIAL EFFECTS ON A CHILD'S HEALTH. NUTRIGENOMICS, THE STUDY OF HOW GENES AND FOOD COMPONENTS INTERACT, LOOKS INTO DIET-ALTERING DISEASE DEVELOPMENT BY MODULATING PROCESSES INVOLVED WITH THE ONSET, PROGRESSION, AND SEVERITY OF DISEASE. THESE FACTORS AFFECTING THE DEVELOPMENT OF THESE CHRONIC DISEASES ARE THOUGHT TO BE MEDIATED BY EPIGENETIC MECHANISMS, WHICH ARE HERITABLE AND REVERSIBLE, AND CARRY GENETIC INFORMATION WITHOUT CHANGING THE NUCLEOTIDE SEQUENCE OF THE GENOME AND ARE ALSO MEDIATED BY MATERNAL AND POSTNATAL NUTRITION. 2023 12 421 25 ANIMAL MODELS IN EPIGENETIC RESEARCH: INSTITUTIONAL ANIMAL CARE AND USE COMMITTEE CONSIDERATIONS ACROSS THE LIFESPAN. THE RAPID EXPANSION AND EVOLUTION OF EPIGENETICS AS A CORE SCIENTIFIC DISCIPLINE HAVE RAISED NEW QUESTIONS ABOUT HOW ENDOGENOUS AND ENVIRONMENTAL FACTORS CAN INFORM THE MECHANISMS THROUGH WHICH BIOLOGICAL FORM AND FUNCTION ARE REGULATED. EXISTING AND PROPOSED ANIMAL MODELS USED FOR EPIGENETIC RESEARCH HAVE TARGETED A MYRIAD OF HEALTH AND DISEASE ENDPOINTS THAT MAY BE ACUTE, CHRONIC, AND TRANSGENERATIONAL IN NATURE. INITIATING EVENTS AND OUTCOMES MAY EXTEND ACROSS THE ENTIRE LIFESPAN TO ELICIT UNANTICIPATED PHENOTYPES THAT ARE OF PARTICULAR CONCERN TO INSTITUTIONAL ANIMAL CARE AND USE COMMITTEES (IACUCS). THE DYNAMICS AND PLASTICITY OF EPIGENETIC MECHANISMS PRODUCE EFFECTS AND CONSEQUENCES THAT ARE MANIFEST DIFFERENTIALLY WITHIN DISCREET SPATIAL AND TEMPORAL CONTEXTS, INCLUDING PRENATAL DEVELOPMENT, STEM CELLS, ASSISTED REPRODUCTIVE TECHNOLOGIES, PRODUCTION OF SEXUAL DIMORPHISMS, SENESCENCE, AND OTHERS. MANY DIETARY AND NUTRITIONAL INTERVENTIONS HAVE ALSO BEEN SHOWN TO HAVE A SIGNIFICANT IMPACT ON BIOLOGICAL FUNCTIONS AND DISEASE SUSCEPTIBILITIES THROUGH ALTERED EPIGENETIC PROGRAMMING. THE ENVIRONMENTAL, CHEMICAL, TOXIC, THERAPEUTIC, AND PSYCHOSOCIAL STRESSORS USED IN ANIMAL STUDIES TO ELICIT EPIGENETIC CHANGES CAN BECOME EXTREME AND SHOULD RAISE IACUC CONCERNS FOR THE WELL-BEING AND PROPER CARE OF ALL RESEARCH ANIMALS INVOLVED. EPIGENETICS RESEARCH IS RAPIDLY BECOMING AN INTEGRAL PART OF THE SEARCH FOR MECHANISMS IN EVERY MAJOR AREA OF BIOMEDICAL AND BEHAVIORAL RESEARCH AND WILL FOSTER THE CONTINUED DEVELOPMENT OF NEW ANIMAL MODELS. FROM THE IACUC PERSPECTIVE, CARE MUST BE TAKEN TO ACKNOWLEDGE THE PARTICULAR NEEDS AND CONCERNS CREATED BY SUPERIMPOSITION OF EPIGENETIC MECHANISMS OVER DIVERSE FIELDS OF INVESTIGATION TO ENSURE THE PROPER CARE AND USE OF ANIMALS WITHOUT IMPEDING SCIENTIFIC PROGRESS. 2012 13 1738 31 EARLY DEVELOPMENTAL CONDITIONING OF LATER HEALTH AND DISEASE: PHYSIOLOGY OR PATHOPHYSIOLOGY? EXTENSIVE EXPERIMENTAL ANIMAL STUDIES AND EPIDEMIOLOGICAL OBSERVATIONS HAVE SHOWN THAT ENVIRONMENTAL INFLUENCES DURING EARLY DEVELOPMENT AFFECT THE RISK OF LATER PATHOPHYSIOLOGICAL PROCESSES ASSOCIATED WITH CHRONIC, ESPECIALLY NONCOMMUNICABLE, DISEASE (NCD). THIS FIELD IS RECOGNIZED AS THE DEVELOPMENTAL ORIGINS OF HEALTH AND DISEASE (DOHAD). WE DISCUSS THE EXTENT TO WHICH DOHAD REPRESENTS THE RESULT OF THE PHYSIOLOGICAL PROCESSES OF DEVELOPMENTAL PLASTICITY, WHICH MAY HAVE POTENTIAL ADVERSE CONSEQUENCES IN TERMS OF NCD RISK LATER, OR WHETHER IT IS THE MANIFESTATION OF PATHOPHYSIOLOGICAL PROCESSES ACTING IN EARLY LIFE BUT ONLY BECOMING APPARENT AS DISEASE LATER. WE ARGUE THAT THE EVIDENCE SUGGESTS THE FORMER, THROUGH THE OPERATION OF CONDITIONING PROCESSES INDUCED ACROSS THE NORMAL RANGE OF DEVELOPMENTAL ENVIRONMENTS, AND WE SUMMARIZE CURRENT KNOWLEDGE OF THE PHYSIOLOGICAL PROCESSES INVOLVED. THE ADAPTIVE PATHWAY TO LATER RISK ACCORDS WITH CURRENT CONCEPTS IN EVOLUTIONARY DEVELOPMENTAL BIOLOGY, ESPECIALLY THOSE CONCERNING PARENTAL EFFECTS. OUTSIDE THE NORMAL RANGE, EFFECTS ON DEVELOPMENT CAN RESULT IN NONADAPTIVE PROCESSES, AND WE REVIEW THEIR UNDERLYING MECHANISMS AND CONSEQUENCES. NEW CONCEPTS CONCERNING THE UNDERLYING EPIGENETIC AND OTHER MECHANISMS INVOLVED IN BOTH DISRUPTIVE AND NONDISRUPTIVE PATHWAYS TO DISEASE ARE REVIEWED, INCLUDING THE EVIDENCE FOR TRANSGENERATIONAL PASSAGE OF RISK FROM BOTH MATERNAL AND PATERNAL LINES. THESE CONCEPTS HAVE WIDER IMPLICATIONS FOR UNDERSTANDING THE CAUSES AND POSSIBLE PREVENTION OF NCDS SUCH AS TYPE 2 DIABETES AND CARDIOVASCULAR DISEASE, FOR BROADER SOCIAL POLICY AND FOR THE INCREASING ATTENTION PAID IN PUBLIC HEALTH TO THE LIFECOURSE APPROACH TO NCD PREVENTION. 2014 14 6119 22 THE EPIGENETIC IMPACTS OF SOCIAL STRESS: HOW DOES SOCIAL ADVERSITY BECOME BIOLOGICALLY EMBEDDED? EPIGENETIC MECHANISMS ARE IMPLICATED IN THE PROCESSES THROUGH WHICH SOCIAL STRESSORS ERODE HEALTH IN HUMANS AND OTHER ANIMALS. HERE I REVIEW PROGRESS IN ELUCIDATING THE BIOLOGICAL PATHWAYS UNDERLYING THE SOCIAL GRADIENT IN HEALTH, WITH PARTICULAR EMPHASIS ON HOW BEHAVIORAL STRESSES INFLUENCE EPIGENOMIC VARIATION LINKED TO HEALTH. THE EVIDENCE THAT EPIGENETIC CHANGES ARE INVOLVED IN EMBEDDING OF SOCIAL STATUS-LINKED CHRONIC STRESS IS REVIEWED IN THE CONTEXT OF CURRENT KNOWLEDGE ABOUT BEHAVIOR WITHIN ANIMAL DOMINANCE HIERARCHIES AND THE IMPACTS OF SOCIAL POSITION ON BEHAVIORS THAT AFFECT HEALTH. THE ROLES OF EPIGENETIC MECHANISMS IN RESPONSES TO TRAUMA AND THE EVIDENCE FOR THEIR INVOLVEMENT IN INTERGENERATIONAL TRANSMISSION OF THE BIOLOGICAL IMPACTS OF TRAUMATIC STRESS ARE ALSO CONSIDERED. TAKEN TOGETHER, THE EMERGING INSIGHTS HAVE IMPORTANT IMPLICATIONS FOR DEVELOPMENT OF STRATEGIES TO IMPROVE SOCIETAL HEALTH AND WELL-BEING. 2016 15 1248 26 CURRENT EVIDENCE FOR BIOLOGICAL BIOMARKERS AND MECHANISMS UNDERLYING ACUTE TO CHRONIC PAIN TRANSITION ACROSS THE PEDIATRIC AGE SPECTRUM. CHRONIC PAIN IS HIGHLY PREVALENT IN THE PEDIATRIC POPULATION. MANY FACTORS ARE INVOLVED IN THE TRANSITION FROM ACUTE TO CHRONIC PAIN. CURRENTLY, THERE ARE CONCEPTUAL MODELS PROPOSED, BUT THEY LACK A MECHANISTICALLY SOUND INTEGRATED THEORY CONSIDERING THE STAGES OF CHILD DEVELOPMENT. OBJECTIVE BIOMARKERS ARE CRITICALLY NEEDED FOR THE DIAGNOSIS, RISK STRATIFICATION, AND PROGNOSIS OF THE PATHOLOGICAL STAGES OF PAIN CHRONIFICATION. IN THIS ARTICLE, WE SUMMARIZE THE CURRENT EVIDENCE ON MECHANISMS AND BIOMARKERS OF ACUTE TO CHRONIC PAIN TRANSITIONS IN INFANTS AND CHILDREN THROUGH THE DEVELOPMENTAL LENS. THE GOAL IS TO IDENTIFY GAPS AND OUTLINE FUTURE DIRECTIONS FOR BASIC AND CLINICAL RESEARCH TOWARD A DEVELOPMENTALLY INFORMED THEORY OF PAIN CHRONIFICATION IN THE PEDIATRIC POPULATION. AT THE OUTSET, THE IMPORTANCE OF OBJECTIVE BIOMARKERS FOR CHRONIFICATION OF PAIN IN CHILDREN IS OUTLINED, FOLLOWED BY A SUMMARY OF THE CURRENT EVIDENCE ON THE MECHANISMS OF ACUTE TO CHRONIC PAIN TRANSITION IN ADULTS, IN ORDER TO CONTRAST WITH THE DEVELOPMENTAL MECHANISMS OF PAIN CHRONIFICATION IN THE PEDIATRIC POPULATION. EVIDENCE IS PRESENTED TO SHOW THAT CHRONIC PAIN MAY HAVE ITS ORIGIN FROM INSULTS EARLY IN LIFE, WHICH PRIME THE CHILD FOR THE DEVELOPMENT OF CHRONIC PAIN IN LATER LIFE. FURTHERMORE, AVAILABLE GENETIC, EPIGENETIC, PSYCHOPHYSICAL, ELECTROPHYSIOLOGICAL, NEUROIMAGING, NEUROIMMUNE, AND SEX MECHANISMS ARE DESCRIBED IN INFANTS AND OLDER CHILDREN. IN CONCLUSION, FUTURE DIRECTIONS ARE DISCUSSED WITH A FOCUS ON RESEARCH GAPS, TRANSLATIONAL AND CLINICAL IMPLICATIONS. UTILIZATION OF DEVELOPMENTAL MECHANISMS FRAMEWORK TO INFORM CLINICAL DECISION-MAKING AND STRATEGIES FOR PREVENTION AND MANAGEMENT OF ACUTE TO CHRONIC PAIN TRANSITIONS IN CHILDREN, IS HIGHLIGHTED. 2023 16 6065 39 THE DEVELOPMENTAL ORIGINS OF CHRONIC PHYSICAL AGGRESSION: BIOLOGICAL PATHWAYS TRIGGERED BY EARLY LIFE ADVERSITY. LONGITUDINAL EPIDEMIOLOGICAL STUDIES WITH BIRTH COHORTS HAVE SHOWN THAT PHYSICAL AGGRESSION IN HUMANS DOES NOT APPEAR SUDDENLY IN ADOLESCENCE AS COMMONLY THOUGHT. IN FACT, PHYSICALLY AGGRESSIVE BEHAVIOUR IS OBSERVED AS EARLY AS 12 MONTHS AFTER BIRTH, ITS FREQUENCY PEAKS AROUND 2-4 YEARS OF AGE AND DECREASES IN FREQUENCY UNTIL EARLY ADULTHOOD. HOWEVER, A MINORITY OF CHILDREN (3-7%) MAINTAIN A HIGH FREQUENCY OF PHYSICAL AGGRESSION FROM CHILDHOOD TO ADOLESCENCE AND DEVELOP SERIOUS SOCIAL ADJUSTMENT PROBLEMS DURING ADULTHOOD. GENETIC FACTORS AND EARLY SOCIAL EXPERIENCES, AS WELL AS THEIR INTERACTION, HAVE BEEN SHOWN TO PLAY AN IMPORTANT ROLE IN THE DEVELOPMENT OF CHRONIC AGGRESSIVE BEHAVIOUR. HOWEVER, THE BIOLOGICAL MECHANISMS UNDERLYING THESE ASSOCIATIONS ARE JUST BEGINNING TO BE UNCOVERED. RECENT EVIDENCE SUGGESTS THAT EPIGENETIC MECHANISMS ARE RESPONSIVE TO ADVERSE ENVIRONMENTS AND COULD BE INVOLVED IN THE DEVELOPMENT OF CHRONIC AGGRESSION. USING BOTH GENE CANDIDATE AND GENOMIC APPROACHES, RECENT STUDIES HAVE IDENTIFIED EPIGENETIC MARKS, SUCH AS DNA METHYLATION ALTERATIONS IN GENES INVOLVED IN THE STRESS RESPONSE AND THE SEROTONIN AND IMMUNE SYSTEMS TO BE PARTLY RESPONSIBLE FOR THE LONG-LASTING EFFECTS OF EARLY ADVERSITY. FURTHER LONGITUDINAL STUDIES WITH BIOLOGICAL, ENVIRONMENTAL AND BEHAVIOURAL ASSESSMENTS FROM BIRTH ONWARDS ARE NEEDED TO ELUCIDATE THE SEQUENCE OF EVENTS THAT LEADS TO THESE LONG-LASTING EPIGENETIC MARKS ASSOCIATED WITH EARLY ADVERSITY AND AGGRESSION. 2015 17 1922 26 ENVIRONMENTAL EPIGENETIC INTERACTION OF GAMETES AND EARLY EMBRYOSDAGGER. IN RECENT YEARS, THE DEVELOPMENTAL ORIGINS OF DISEASES HAVE BEEN INCREASINGLY RECOGNIZED AND ACCEPTED. AS SUCH, IT HAS BEEN SUGGESTED THAT MOST ADULTHOOD CHRONIC DISEASES SUCH AS DIABETES, OBESITY, CARDIOVASCULAR DISEASE, AND EVEN TUMORS MAY DEVELOP AT A VERY EARLY STAGE. IN ADDITION TO INTRAUTERINE ENVIRONMENTAL EXPOSURE, GERM CELLS CARRY AN IMPORTANT INHERITANCE ROLE AS THE PRIMARY LINK BETWEEN THE TWO GENERATIONS. ADVERSE EXTERNAL INFLUENCES DURING DIFFERENTIATION AND DEVELOPMENT CAN CAUSE DAMAGE TO GERM CELLS, WHICH MAY THEN INCREASE THE RISK OF CHRONIC DISEASE DEVELOPMENT LATER IN LIFE. HERE, WE FURTHER ELUCIDATE AND CLARIFY THE CONCEPT OF GAMETE AND EMBRYO ORIGINS OF ADULT DISEASES BY FOCUSING ON THE ENVIRONMENTAL INSULTS ON GERM CELLS, FROM DIFFERENTIATION TO MATURATION AND FERTILIZATION. 2022 18 2007 22 EPIGENETIC BASIS FOR FETAL ORIGINS OF AGE-RELATED DISEASE. THE CURRENT CONCEPT OF FETAL ORIGINS OF ADULT DISEASES DESCRIBES IN UTERO PROGRAMMING, OR ADAPTATION TO A SPECTRUM OF ADVERSE ENVIRONMENTAL CONDITIONS THAT ULTIMATELY LEADS TO INCREASED SUSCEPTIBILITY TO AGE-RELATED DISEASES (E.G., TYPE 2 DIABETES AND CARDIOVASCULAR DISEASE) LATER IN LIFE. ALTHOUGH THE PRECISE MECHANISM OF THIS BIOLOGICAL MEMORY REMAINS UNCLEAR, MOUNTING EVIDENCE SUGGESTS AN EPIGENETIC BASIS. THE INCREASED SUSCEPTIBILITY TO CHRONIC DISEASE AND INVOLVEMENT OF MULTIPLE ORGAN SYSTEMS THAT IS OBSERVED IS ANALOGOUS TO THE DECLINE IN RESISTANCE TO DISEASE THAT IS TYPICAL OF NORMAL AGING. ALTHOUGH THE CUMULATIVE ENVIRONMENT OVER THE COURSE OF A LIFETIME CAN INDUCE INCREASING EPIGENETIC DYSREGULATION, WE PROPOSE THAT ADVERSE EVENTS THAT OCCUR DURING EARLY DEVELOPMENT CAN INDUCE SIGNIFICANT ADDITIONAL DYSREGULATION OF THE EPIGENOME. HERE, WE DESCRIBE THE CURRENT EVIDENCE FOR FETAL ORIGINS OF ADULT DISEASE AND THE ASSOCIATED ROLE OF EPIGENETIC DYSREGULATION. IN ADDITION, WE PRESENT A NEW PERSPECTIVE ON THE INDUCTION OF EPIGENETIC ALTERATIONS IN UTERO, WHICH SUBSEQUENTLY LEAD TO AN AGING PHENOTYPE MARKED BY INCREASED SUSCEPTIBILITY TO AGE-RELATED DISEASES. 2010 19 6063 25 THE DEVELOPMENTAL ENVIRONMENT, EPIGENETIC BIOMARKERS AND LONG-TERM HEALTH. EVIDENCE FROM BOTH HUMAN AND ANIMAL STUDIES HAS SHOWN THAT THE PRENATAL AND EARLY POSTNATAL ENVIRONMENTS INFLUENCE SUSCEPTIBILITY TO CHRONIC DISEASE IN LATER LIFE AND SUGGESTS THAT EPIGENETIC PROCESSES ARE AN IMPORTANT MECHANISM BY WHICH THE ENVIRONMENT ALTERS LONG-TERM DISEASE RISK. EPIGENETIC PROCESSES, INCLUDING DNA METHYLATION, HISTONE MODIFICATION AND NON-CODING RNAS, PLAY A CENTRAL ROLE IN REGULATING GENE EXPRESSION. THE EPIGENOME IS HIGHLY SENSITIVE TO ENVIRONMENTAL FACTORS IN EARLY LIFE, SUCH AS NUTRITION, STRESS, ENDOCRINE DISRUPTION AND POLLUTION, AND CHANGES IN THE EPIGENOME CAN INDUCE LONG-TERM CHANGES IN GENE EXPRESSION AND PHENOTYPE. IN THIS REVIEW WE FOCUS ON HOW THE EARLY LIFE NUTRITIONAL ENVIRONMENT CAN ALTER THE EPIGENOME LEADING TO AN ALTERED SUSCEPTIBILITY TO DISEASE IN LATER LIFE. 2015 20 6803 21 [EPIGENETIC MECHANISMS IN PHYSIOLOGIC AND PATHOLOGIC PREGNANCIES]. EPIGENETIC FACTORS ARE NOWADAYS IN THE FOCUS OF SCIENTIFIC INTEREST IN MEDICINE INCLUDING OBSTETRICS. THE ENVIRONMENT IN UTERO AND EARLY NEONATAL LIFE MAY INDUCE A PERMANENT RESPONSE IN THE FETUS AND THE NEWBORN LEADING TO ENHANCED SUSCEPTIBILITY TO LATER DISEASES. THERE IS NOW GROWING EVIDENCE THAT THE EFFECTS OF DEVELOPMENTAL PROGRAMMING MAY ALSO MANIFEST THEMSELVES IN THE NEXT GENERATIONS WITHOUT FURTHER SUBOPTIMAL EXPOSURE. THE SO-CALLED FETAL PROGRAMMING MAY ALSO HIGHLIGHT A TIGHT CONNECTION BETWEEN PATHOLOGICAL CONDITIONS IN PREGNANCY, ENVIRONMENTAL FACTORS AND THE DEVELOPMENT OF CHRONIC DISEASES IN ADULTHOOD. INVESTIGATION OF EPIGENETIC FACTORS MAY YIELD NEW POSSIBILITIES FOR THE PREVENTION OF CHRONIC DISEASES AFFECTING A SIGNIFICANT PART OF THE POPULATION. 2014