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Related Concept Videos

Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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Genome-wide Association Studies-GWAS01:11

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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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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Genetic Contribution to Medium-Term Disease Activity in Multiple Sclerosis.

Elisabetta Mascia1, Valentina Nale2, Laura Ferrè1,3

  • 1Laboratory of Human Genetics of Neurological Disorders, Institute of Experimental Neurology, Division of Neuroscience, IRCCS San Raffaele Scientific Institute, Milan, Italy.

Molecular Neurobiology
|June 8, 2024
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Summary

Genetic factors influence multiple sclerosis (MS) disease activity. This study identified key genes and pathways in brain and immune cells, revealing shared mechanisms underlying MS progression.

Keywords:
Disease activityMultiple sclerosisNetwork analysis

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Area of Science:

  • Genetics
  • Neuroimmunology
  • Systems Biology

Background:

  • Multiple sclerosis (MS) exhibits significant heterogeneity in clinical presentation, prognosis, and treatment response.
  • Understanding the genetic underpinnings of MS disease activity is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the genetic contribution to MS disease activity at the gene, pathway, and tissue-specific network levels.
  • To identify genetic variants and genes associated with disease activity over a 4-year follow-up period in relapsing-remitting MS patients.

Main Methods:

  • Analysis of two cohorts (n=1294) of relapsing-remitting MS patients initiating first-line treatment.
  • Whole-genome single nucleotide polymorphism (SNP) and gene-level association studies.
  • Construction and analysis of brain and lymphocyte-specific gene-gene interaction networks.

Main Results:

  • Identified 23 variants and 223 genes associated with 4-year MS disease activity.
  • Highlighted genes such as PON2 (oxidative stress, mitochondrial function) and ILRUN (immune modulation).
  • Discovered distinct brain (228 genes) and lymphocyte (287 genes) network modules, with MPHOSPH9 and OPA1 identified as key players.

Conclusions:

  • Genetic factors contribute significantly to MS disease activity.
  • Network analyses revealed shared and tissue-specific inflammatory pathways in both brain and lymphocyte modules.
  • These findings suggest that common biological mechanisms across different tissues drive MS disease activity.