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Autoimmune Disorders

Autoimmune Disorders

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...

The Ratio of X Chromosome to Autosomes

The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female...

What is the Immune System?

What is the Immune System?

Dosage Compensation

Dosage Compensation

In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with distinct numbers of X chromosomes will...

X and Y Chromosomes

X and Y Chromosomes

Among mammals, the gender of an organism is determined by the sex chromosomes. Humans have two sex chromosomes, X and Y. Every human diploid cell has 22 pairs of autosomes and one pair of sex chromosomes. A human female has two X chromosomes, while a male has one X chromosome and one Y chromosome.
The germline cells such as egg and sperm cells carry only half the number of chromosomes, i.e., 22 autosomes and one sex chromosome. All eggs have an X chromosome, while sperm cells can carry an X or...

The Y Chromosome Determines Maleness

The Y Chromosome Determines Maleness

The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size....

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Interrogating Individual Autoreactive Germinal Centers by Photoactivation in a Mixed Chimeric Model of Autoimmunity

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Published on: April 11, 2019

Sexual dimorphism in autoimmunity.

Kira Rubtsova, Philippa Marrack, Anatoly V Rubtsov

The Journal of Clinical Investigation

|April 28, 2015

Summary

This summary is machine-generated.

Autoimmune diseases disproportionately affect females due to sex-specific gene expression influenced by hormones and genetics. Understanding these sex differences is crucial for developing effective treatments for autoimmunity.

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Area of Science:

Immunology
Genetics
Endocrinology

Background:

Autoimmune diseases arise from the immune system attacking host tissues, representing a significant health burden in the U.S.
A pronounced sex bias exists, with most autoimmune conditions predominantly affecting females.
The lack of a cure necessitates research into the underlying mechanisms triggering these diseases.

Purpose of the Study:

To review recent findings on sex-dependent regulation of gene expression.
To explore how these sex-specific gene expression changes contribute to autoimmunity.
To understand the factors influencing sex bias in autoimmune diseases.

Main Methods:

Review of current scientific literature on sex differences in gene expression and autoimmunity.
Analysis of factors such as sex hormones, X chromosome complement, and gut microbiota.
Discussion of how these factors modulate gene expression in a sex-specific manner.

Main Results:

Sex-specific factors profoundly influence gene expression patterns.
These sex-specific gene expression changes are linked to susceptibility or protection from autoimmune diseases.
Evidence suggests a strong connection between sex-specific biology and the prevalence of autoimmunity.

Conclusions:

Sex-specific gene expression plays a critical role in the pathogenesis of autoimmune diseases.
Understanding these sex-dependent mechanisms is key to addressing the sex bias in autoimmunity.
Further research into sex-specific regulatory pathways may reveal novel therapeutic targets.