Association of adverse childhood experiences with adulthood multiple sclerosis: A systematic review of observational studies

Childhood adversity in parents of patients with pediatric multiple sclerosis

BACKGROUND

Childhood environmental factors back to the prenatal environment can contribute to MS risk. Childhood adversity, which causes biological, behavioral, and epigenetic changes that can be passed down through families, has been understudied in MS. Here, we emphasize the need to understand the role that intergenerational adversity may play among families affected by MS.

OBJECTIVE

To evaluate the frequency and types of adverse childhood experiences among parents of children with MS.

METHODS

Individuals with pediatric MS (n = 68) were enrolled in a longitudinal study of cognition. At enrollment, the patient and one caregiver or parent completed questionnaires. As the pediatric participants were under age 18 at time of enrollment, one parent completed the Adverse Childhood Experiences (ACEs, a 10-item self-report measure) about the parents' own childhood. Results from the ACE questionnaire among parents of pediatric healthy controls (n = 96) and adults in a national cohort are also reported for comparison.

RESULTS

Over half of pediatric MS parents reported at least one ACE exposure. Of parents that did have ACE exposures, the exposures were broad in terms of abuse, neglect, and household dysfunction. Over 10 % of parents reported total ACE scores of 7 or above.

CONCLUSION

Over half of pediatric MS parents experienced some degree of childhood adversity. The impact of intergenerational adversity on the development of pediatric onset MS warrants further study.

Health effects associated with exposure of children to physical violence, psychological violence and neglect: a Burden of Proof study

The health toll of child maltreatment or violence against children (VAC) has not yet been comprehensively evaluated. Here, in our systematic review and meta-analyses, we focused on the health impacts of physical violence, psychological violence and neglect during childhood. Utilizing the Burden of Proof methodology, which generates conservative measures of association while accounting for heterogeneity between input studies, we evaluated 35 associations between VAC and adverse health outcomes, identifying 27 statistically significant links. The associations between physical violence and major depressive disorder, ischaemic heart disease, alcohol use disorder, eating disorders and drug use disorders were rated as moderately weak, reflecting a small effect size and/or inconsistent evidence. The minimum increased risk ranged from 16% for depression to 2% for drug use disorders. Psychological violence showed similar moderately weak associations with drug use disorders (8% minimum risk increase), migraine (7%) and gynaecological diseases (2%). Neglect was linked to at least a 15% increased risk for anxiety disorders. The other 18 associations were weaker due to smaller effect sizes and/or less consistent evidence. Despite the limitations of the existing evidence, our analysis highlights substantial health impacts for VAC survivors, underscoring the need for health system prioritization and continued efforts to eliminate all forms of VAC.

A nested case-control study evaluating the relationship between adverse childhood experiences and immune-mediated inflammatory disease in the Canadian Longitudinal Study on Aging

OBJECTIVE

Adverse childhood experiences (ACE) have inconsistently been implicated as risk factors for immune-mediated inflammatory diseases (IMID). We evaluated whether the association of ACE with disease differs between IMID and other chronic diseases.

DESIGN

Nested retrospective case-control study.

SETTING

We used data from the Canadian Longitudinal Study on Aging (CLSA), which recruited participants aged 45-85 years between 2010 and 2015.

PARTICIPANTS

We included 12 627 CLSA participants: 2 102 who reported diagnoses of IMID (258 multiple sclerosis (MS), 1 692 rheumatoid arthritis (RA) and 160 inflammatory bowel disease (IBD)), 5 519 with diabetes, 170 with epilepsy, 3 889 with asthma and 1 125 with no chronic diseases. ACE, including childhood maltreatment (physical, emotional and sexual abuse, neglect) and household dysfunction, were queried using questions from the Childhood Experiences of Violence Questionnaire-Short Form and the National Longitudinal Study of Adolescent to Adult Health Wave III questionnaire.

PRIMARY AND SECONDARY OUTCOME MEASURES

We first evaluated whether the association of maltreatment differed across diagnoses (IMID, diabetes, asthma, epilepsy, no chronic diseases). Second, we evaluated whether the association between maltreatment differed across IMID. We repeated our analyses for different types of ACE.

RESULTS

Maltreatment or household dysfunction was experienced by 64% of participants and 30% experienced both. On multivariable analysis, history of any maltreatment, sexual abuse, any household dysfunction and having ≥3 types of ACE were all associated with increased risk of IMID compared with no chronic disease. The association between ACE and IMID did not differ across MS, RA and IBD.

CONCLUSION

ACE are common among Canadians with and without chronic diseases. History of any maltreatment or household dysfunction is associated with increased risk of chronic disease.

Adverse childhood experiences and psychiatric comorbidity in multiple sclerosis, inflammatory bowel disease, and rheumatoid arthritis in the Canadian longitudinal study on aging

OBJECTIVES

Adverse childhood experiences (ACE) are associated with immune-mediated inflammatory diseases (IMID). We evaluated whether: (i) ACE associate with psychiatric comorbidity among individuals with IMID, including rheumatoid arthritis (RA), multiple sclerosis (MS), and inflammatory bowel disease (IBD); (ii) whether psychiatric disorders mediate the relationship between ACE and IMID; and (iii) whether these findings differ from those in individuals with other chronic physical disorders.

METHODS

Using data from the Canadian Longitudinal Study on Aging (CLSA) we performed a retrospective case-control study of participants aged 45-85 years recruited between 2010 and 2015. ACE were queried using questions derived from the Childhood Experiences of Violence Questionnaire-Short Form and the National Longitudinal Study of Adolescent to Adult Health Wave III questionnaire. We used multivariable logistic regression and causal mediation analysis to address our objectives.

RESULTS

We included 13,977 CLSA participants. Among the 31 % of IMID participants who reported a comorbid psychiatric disorder, 79 % reported a history of ACE. ACE associated with increased odds (OR [95 % CI]) of a psychiatric disorder (2.55 [1.02-6.35]) among participants with IMID; this did not differ across IMID. The total effect (OR [95 % CI]) of ACE on IMID was 1.11 (1.07-1.16), of which 10.60 % (8.04-17.47) was mediated by psychiatric disorders. We found similar associations among participants with other chronic physical disorders.

CONCLUSION

Our findings suggest that psychiatric disorders partially mediate the association between ACE and IMID. Most participants with IMID and comorbid psychiatric disorders report a history of ACE and may benefit from trauma-informed mental health care.

A Brief Historic Review of Research on Early Life Stress and Inflammation across the Lifespan

BACKGROUND

Extensive evidence from animal and human studies indicates that exposure to stress during sensitive developmental periods significantly increases the risk for psychiatric and physical disorders, resulting in reduced longevity. Chronic immune activation has been suggested as one pathway through which early adverse experiences may become biologically embedded. This paper highlights selected key findings and questions that first emerged in the literature and founded the field and then examines how research methods and questions have evolved over time.

SUMMARY

During the past decades, evidence from preclinical, clinical, and epidemiological studies has accumulated suggesting consequences of early life stress (ELS) exposure for immune function, particularly increased chronic inflammation or inflammatory responses. Scientific approaches to study the effects of ELS on the immune system have changed since the first studies on this topic were published.

KEY MESSAGES

Across different study designs, species, and methods, a consistent association between childhood adversity and a pro-inflammatory phenotype has been reported. We critically discuss which topics warrant further consideration and how current findings could be used to develop targeted interventions to prevent or reverse the biological embedding of ELS and resultant disease manifestations.

Adverse Childhood Experiences and the Risk of Multiple Sclerosis Development: A Review of Potential Mechanisms

Adverse childhood experiences (ACEs), such as abuse, neglect, and household dysfunction, contribute to long-term systemic toxic stress and inflammation that may last well into adulthood. Such early-life stressors have been associated with increased susceptibility to multiple sclerosis (MS) in observational studies and with the development of experimental autoimmune encephalomyelitis in animal models. In this review, we summarize the evidence for an ACE-mediated increase in MS risk, as well as the potential mechanisms for this association. ACEs dysregulate neurodevelopment, stress responses, and immune reactivity; they also alter the interplay between the immune system and neural networks. All of this may be relevant for MS risk. We further discuss how ACEs induce epigenetic changes and how the toxic stress caused by ACEs may reactivate the Epstein-Barr Virus (EBV), a key risk factor for MS. We conclude by suggesting new initiatives to obtain further insights into this topic.

Effects of Psychological Stress on Multiple Sclerosis via HPA Axis-mediated Modulation of Natural Killer T Cell Activity

The involvement of psychological stress and Natural Killer T (NKT) cells in the pathophysiology of multiple sclerosis has been identified in the progression of this disease. Psychological stress can impact disease occurrence, relapse, and severity through its effects on the Hypothalamic- Pituitary-Adrenal (HPA) axis and immune responses. NKT cells are believed to play a pivotal role in the pathogenesis of multiple sclerosis, with recent evidence suggesting their distinct functional alterations following activation of the HPA axis under conditions of psychological stress. This review summarizes the associations between psychological stress, NKT cells, and multiple sclerosis while discussing the potential mechanism for how NKT cells mediate the effects of psychological stress on this disease.