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Mitochondrial genetics cooperate with nuclear genetics to selectively alter immune cell development/trafficking
T C Beadnell1, C Fain1, C J Vivian1
1Department of Cancer Biology, Department of Microbiology, Immunology and Genetics, The University of Kansas Cancer Center, The University of Kansas Medical Center, United States of America.
Biochimica Et Biophysica Acta. Molecular Basis of Disease
|January 4, 2020
Summary
Mitochondrial DNA (mtDNA) single nucleotide polymorphisms (SNP) selectively alter immune cell development and differentiation, revealing nuclear-mitochondrial interactions that impact immune system regulation.
Area of Science:
- Immunology
- Cell Biology
- Genetics
Background:
- The nuclear genome influences immune cell populations and differentiation, partly via metabolic regulation.
- The specific role of mitochondrial DNA (mtDNA) polymorphisms in immune cell processes remains largely unexplored.
- Mitochondria are known to interact with immune cell polarization, suggesting a potential link to mtDNA variations.
Purpose of the Study:
- To investigate whether mtDNA single nucleotide polymorphisms (SNP) affect immune cell development, trafficking, and differentiation.
- To explore the influence of mtDNA variations on innate and adaptive immune cell populations.
- To understand the interplay between nuclear and mitochondrial genomes in immune system regulation.
Main Methods:
- Utilized mitochondrial nuclear exchange (MNX) mice to isolate effects of mtDNA.
- Isolated and characterized innate and adaptive immune cell populations from peritoneal and spleen tissues.
- Compared immune cell profiles between mouse strains with differing mtDNA.
Main Results:
- Identified selective changes in immune cell populations mediated by mtDNA differences, distinct from nuclear DNA (nDNA) regulation.
- Observed specific alterations in macrophage (CD11c) differentiation influenced by mtDNA SNP.
- Demonstrated that mtDNA polymorphisms can impact immune cell biology.
Conclusions:
- mtDNA SNP play a selective role in modulating immune cell differentiation and potentially other immune functions.
- Nuclear-mitochondrial crosstalk, influenced by mtDNA variations, can alter immune system components.
- These findings suggest novel mechanisms by which mtDNA can impact host physiology and pathology through immune system regulation.
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