Related Experiment Video
Updated: Feb 24, 2026
05:44
Author Spotlight: Creating a Versatile Experimental Autoimmune Encephalomyelitis Model Relevant for Both Male and Female Mice
Published on: October 13, 2023
2.5K
Multiple sclerosis and environmental risk factors: a case-control study in Iran
Maryam Abbasi1,2, Seyed Massood Nabavi3,4, Seyed Mohammad Fereshtehnejad5
1Immunoregulation Research Center, Shahed University, Tehran, Iran.
Summary
Environmental factors like prematurity, childhood head trauma, and certain infections increase multiple sclerosis (MS) risk in Iran. Conversely, sun exposure and dairy consumption appear protective against MS.
Area of Science:
- Neurology
- Environmental Health
- Epidemiology
Background:
- Multiple Sclerosis (MS) incidence is rising in Iran.
- Environmental factors are increasingly recognized as contributors to MS development.
- Understanding these factors is crucial for public health strategies in the region.
Purpose of the Study:
- To investigate the association between various environmental exposures and the risk of developing MS in Iran.
- To identify both risk and protective factors for MS within the Iranian population.
Main Methods:
- A case-control study design was employed.
- 660 individuals diagnosed with MS (cases) and 421 healthy individuals (controls) participated.
- Environmental exposures and medical histories were compared between the two groups.
Main Results:
- Significant risk factors for MS included prematurity, measles, mumps, childhood head trauma, adult vaccination, migraine, family history of MS and related conditions, stressful events, and microwave exposure.
- Protective factors identified were sun exposure, dairy and calcium consumption, diabetes mellitus, and complete childhood vaccination.
Conclusions:
- Multiple environmental and lifestyle factors are significantly associated with MS risk in Iran.
- Identifying these factors can inform targeted prevention and intervention strategies.
- Further research is warranted to elucidate the complex interplay of genetics and environment in MS etiology within this population.
Related Concept Videos
01:29Psychological and Sociocultural Causes of Schizophrenia
707
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...
707
01:18Factors Affecting Illness
5.5K
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.
For instance, risk factors are connected to illness,...
For instance, risk factors are connected to illness,...
5.5K
01:29Autoimmune Disorders
2.0K
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.
Concept and Mechanism of Autoimmune Diseases
The immune...
Concept and Mechanism of Autoimmune Diseases
The immune...
2.0K
01:29Environmental Influences on Intelligence
1.0K
Despite the strong genetic influence on traits like intelligence, environmental factors significantly shape outcomes. For example, while over 90% of height variation is due to genetic differences, environmental factors such as nutrition also have a notable impact. Similarly, for intelligence, changes in a child's surroundings can significantly alter their IQ. Research shows that enriched environments boost children's academic success and help them develop key cognitive skills. Children...
1.0K
01:20Gene-Environment Interactions
1.3K
Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
1.3K
01:24Drug Toxicity: Risk factors
55
Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
55