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A role for microchimerism in obesity and evolution?

Marc Schnitzler1, Paul Fisch

  • 1Department of Hematology and Oncology, Freiburg University Medical Center, Hugstetter Str. 55, 79106 Freiburg, Germany. marc.schnitzler@uniklinik-freiburg.de

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Summary
This summary is machine-generated.

Microchimerism, cells shared between individuals, may limit genomic diversity and cause chronic inflammation. This immune response to genetic differences could link population diversity to metabolic syndrome and evolution.

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Area of Science:

  • Immunology
  • Evolutionary Biology
  • Human Genetics

Background:

  • Cells exchanged between mother and fetus can persist for decades, causing microchimerism.
  • Microchimeric cells are linked to tissue repair, chronic inflammation, autoimmunity, and cancer.

Purpose of the Study:

  • To propose microchimerism's fundamental role in limiting genomic variability within populations.
  • To explore the link between microchimerism, genomic diversity, chronic inflammation, and metabolic syndrome.
  • To discuss microchimerism's potential role in speciation.

Main Methods:

  • Literature review and theoretical modeling.
  • Analysis of existing data on cell exchange and immune responses.
  • Hypothesizing the evolutionary implications of microchimerism.

Main Results:

  • Microchimerism facilitates immune recognition of genomic differences, potentially causing chronic inflammation.
  • Chronic inflammation, linked to metabolic syndrome, may be influenced by population-level genomic diversity.
  • Increased human population diversity due to migration may contribute to metabolic syndrome.

Conclusions:

  • Microchimerism may limit genomic variability, impacting health and evolution.
  • Genomic diversity, influenced by microchimerism, could be a factor in metabolic syndrome prevalence.
  • Immunological incompatibility may drive species development.