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Autoimmune Disorders01:29

Autoimmune Disorders

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Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
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When a person's physical, emotional, intellectual, social development or spiritual functioning is compromised, this deviation from a healthy normal state is called illness. Illness creates stress that in turn harms individuals. Irritation, anger, denial, hopelessness, and fear are behavioral and emotional changes an individual experiences in the phases of illness. A variety of factors influence a person's health and well-being.
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Schizophrenia, a complex psychiatric disorder, has been historically misunderstood. Early psychological theories attributed its origins to childhood trauma and unresponsive parenting. However, contemporary research largely rejects these notions, favoring the vulnerability-stress hypothesis. This model proposes that individuals with a genetic predisposition to schizophrenia may develop the disorder following exposure to significant environmental stressors. Notably, studies on high-risk...
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Environmental factors in multiple sclerosis.

Vasiliki Pantazou1, Myriam Schluep1, Renaud Du Pasquier2

  • 1CHUV, University Hospital of Lausanne, Department of Clinical Neurosciences, Service of Neurology, 1011 Lausanne, Switzerland.

Presse Medicale (Paris, France : 1983)
|March 7, 2015
PubMed
Summary
This summary is machine-generated.

Environmental factors like Epstein-Barr virus and low vitamin D significantly impact multiple sclerosis (MS) risk, especially when exposure occurs in childhood. Early life preventive measures may reduce MS development and progression.

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Area of Science:

  • Neuroimmunology
  • Environmental Medicine
  • Epidemiology

Background:

  • Multiple sclerosis (MS) is an immune-mediated disorder influenced by genetic and environmental interactions.
  • Key environmental factors implicated in MS risk include viral infections (Epstein-Barr virus), vitamin D (VitD) levels, and sun exposure (UVR).
  • The gut-brain axis and its role in CNS autoimmunity are increasingly recognized.

Purpose of the Study:

  • To review the influence of environmental factors on multiple sclerosis (MS) onset, clinical course, and therapeutic response.
  • To highlight the critical role of early-life exposures in MS pathogenesis.
  • To explore potential primary prevention strategies for MS.

Main Methods:

  • Review of epidemiological and animal model studies on environmental factors in MS.
  • Analysis of the impact of viral infections, vitamin D, UVR, and gut microbiota on MS.
  • Discussion of the implications for early-life prevention and future research.

Main Results:

  • Epstein-Barr virus infection and low vitamin D are strongly associated with increased MS risk.
  • Insufficient UVR exposure in childhood may be a VitD-independent risk factor for MS.
  • Childhood environmental exposures appear crucial for later MS development and progression.

Conclusions:

  • Childhood represents a critical window for MS development, suggesting the importance of early-life preventive measures.
  • Simple public health strategies like adequate vitamin D intake, outdoor activity, and avoiding passive smoking could be beneficial.
  • Further prospective studies are needed to confirm these hypotheses and investigate the efficacy of vitamin D supplementation in adult MS patients.