Aging-US: A pro-diabetogenic mtDNA polymorphism in mitochondrial-derived peptide
'The m.1382A>C polymorphism is associated with susceptibility to T2D in men, possibly interacting with exercise, and contributing to the risk of T2D in sedentary males by reducing the activity of MOTS-c'
2021-02-03
(Press-News.org) C polymorphism is associated with susceptibility to T2D in men, possibly interacting with exercise, and contributing to the risk of T2D in sedentary males by reducing the activity of MOTS-c.
Dr. Noriyuki Fuku from The Juntendo University and Dr. Pinchas Cohen from The University of Southern California said, "The prevalence of type 2 diabetes mellitus (T2D) is growing dramatically."
While diabetes syndromes directly caused by mutations in mtDNA are extremely rare, several genetic analyses reveal that mtDNA polymorphisms contribute to T2D risk in both European and Asian populations.
MOTS-c levels are correlated with insulin resistance, and circulating MOTS-c levels are reduced in obese male children.
MOTS-c levels are inversely correlated with markers of insulin resistance and obesity including BMI, waist circumference, waist-to-hip ratio, fasting insulin level, HOMA-IR, HbA1c.
Although that study suggested an association between the haplogroup that includes mtDNA SNP at the MOTS-c region and T2D, the relation between the m.1382A>C polymorphism and human T2D pathophysiology was not explored.
Here, they elucidated the association between T2D and m.1382A>C in Japanese individuals and established the abnormal biological effects of the K14Q MOTS-c peptide variant - a consequence of the m.1382A>C polymorphism - on insulin action and adiposity in vitro and in vivo.
The Fuku/Cohen Research Team concluded in their Aging-US Research Paper, "we found that the C allele of the m.1382A>C polymorphism changes body composition and increases the risk of T2D in Japanese men, especially in sedentary individuals. This polymorphism causes an amino acid replacement from Lys (K) to Gln (Q) at amino acid 14 in the MOTS-c peptide, which renders it a less potent insulin-sensitizer compared to WT MOTS-c. A deeper understanding the effects of this genetic polymorphism will provide a basis for developing physical activity strategies to maximize the benefits of exercise in T2D."
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DOI - https://doi.org/10.18632/aging.202529
Full Text - https://www.aging-us.com/article/202529/text
Correspondence to: Noriyuki Fuku email: noriyuki.fuku@nifty.com and Pinchas Cohen email: hassy@usc.edu
Keywords: diabetes, mitochondrial DNA, polymorphism, MOTS-c insulin resistance
About Aging-US
Launched in 2009, Aging-US publishes papers of general interest and biological significance in all fields of aging research as well as topics beyond traditional gerontology, including, but not limited to, cellular and molecular biology, human age-related diseases, pathology in model organisms, cancer, signal transduction pathways (e.g., p53, sirtuins, and PI-3K/AKT/mTOR among others), and approaches to modulating these signaling pathways.
To learn more about Aging-US, please visit http://www.Aging-US.com or connect with @AgingJrnl
Aging-US is published by Impact Journals, LLC please visit http://www.ImpactJournals.com or connect with @ImpactJrnls
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[Press-News.org] Aging-US: A pro-diabetogenic mtDNA polymorphism in mitochondrial-derived peptide
'The m.1382A>C polymorphism is associated with susceptibility to T2D in men, possibly interacting with exercise, and contributing to the risk of T2D in sedentary males by reducing the activity of MOTS-c'
