TY - JOUR
T1 - A Natural mtDNA Polymorphism in Complex III Is a Modifier of Healthspan in Mice
AU - Hirose, Misa
AU - Künstner, Axel
AU - Schilf, Paul
AU - Tietjen, Anna Katharina
AU - Jöhren, Olaf
AU - Huebbe, Patricia
AU - Rimbach, Gerald
AU - Rupp, Jan
AU - Schwaninger, Markus
AU - Busch, Hauke
AU - Ibrahim, Saleh M
PY - 2019/5/13
Y1 - 2019/5/13
N2 - In this study, we provide experimental evidence that a maternally inherited polymorphism in the mitochondrial cytochrome b gene (mt-Cytb; m.15124A>G, Ile-Val) in mitochondrial complex III resulted in middle-aged obesity and higher susceptibility to diet-induced obesity, as well as age-related inflammatory disease, e.g., ulcerative dermatitis, in mice. As a consequence of the gene variation, we observed alterations in body composition, metabolism and mitochondrial functions, i.e., increased mitochondrial oxygen consumption rate and higher levels of reactive oxygen species, as well as in the commensal bacterial composition in the gut, with higher abundance of Proteobacteria in mice carrying the variant. These observations are in line with the previously described links of the mitochondrial complex III gene with obesity and metabolic diseases in humans. Given that these functional changes by the G variant at m.15124 in the mt-Cytb are already present in young mice that were kept under normal condition, it is plausible that the m.15124A>G variant is a disease susceptibility modifier to the diseases induced by additional stressors, i.e., dietary and/or aging stress, and that the variant results in the higher incidence of clinical diseases presentation in C57BL/6J-mt129S1/SvlmJ than C57BL/6J mice. Thus, mtDNA variants could be potential biomarkers to evaluate the healthspan.
AB - In this study, we provide experimental evidence that a maternally inherited polymorphism in the mitochondrial cytochrome b gene (mt-Cytb; m.15124A>G, Ile-Val) in mitochondrial complex III resulted in middle-aged obesity and higher susceptibility to diet-induced obesity, as well as age-related inflammatory disease, e.g., ulcerative dermatitis, in mice. As a consequence of the gene variation, we observed alterations in body composition, metabolism and mitochondrial functions, i.e., increased mitochondrial oxygen consumption rate and higher levels of reactive oxygen species, as well as in the commensal bacterial composition in the gut, with higher abundance of Proteobacteria in mice carrying the variant. These observations are in line with the previously described links of the mitochondrial complex III gene with obesity and metabolic diseases in humans. Given that these functional changes by the G variant at m.15124 in the mt-Cytb are already present in young mice that were kept under normal condition, it is plausible that the m.15124A>G variant is a disease susceptibility modifier to the diseases induced by additional stressors, i.e., dietary and/or aging stress, and that the variant results in the higher incidence of clinical diseases presentation in C57BL/6J-mt129S1/SvlmJ than C57BL/6J mice. Thus, mtDNA variants could be potential biomarkers to evaluate the healthspan.
UR - http://www.mendeley.com/research/natural-mtdna-polymorphism-complex-iii-modifier-healthspan-mice
UR - http://www.scopus.com/inward/record.url?scp=85066852019&partnerID=8YFLogxK
U2 - 10.3390/ijms20092359
DO - 10.3390/ijms20092359
M3 - Journal articles
C2 - 31085998
SN - 1661-6596
VL - 20
SP - 2359
JO - International Journal of Molecular Sciences
JF - International Journal of Molecular Sciences
IS - 9
M1 - 2359
ER -