Association between plasma L-carnitine levels and mitochondrial DNA copy number.

Association between plasma L-carnitine levels and mitochondrial DNA copy number.
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DOI:
10.1186/s12860-023-00496-z
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发表时间:
2023-12-11
影响因子:
2.8
通讯作者:
--
中科院分区:
医学4区
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--
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线粒体是真核细胞中通过电子传递链和氧化磷酸化产生三磷酸腺苷(ATP)的关键细胞器。线粒体DNA (mtDNA)拷贝数(mtDNAcn)被认为是线粒体数量和功能以及细胞氧化应激水平的生物标志物。先前的流行病学研究结果显示,体重增加、较高的身体质量指数(BMI)、吸烟和高胰岛素潜在生活方式与白细胞mtDNAcn降低有关。肉毒碱是一组在能量产生中起关键作用的化合物。我们量化了血浆左旋肉碱水平与白细胞mtDNAcn的关系。然后,我们在538名没有癌症、糖尿病或心血管疾病的美国男性中检测了mtDNAcn和左旋肉碱(HMDB0000062)之间的关系,这些男性的血液采集来自健康专业人员随访研究(HPFS)。我们发现左旋肉碱与mtDNAcn呈显著负相关(ρ = - 0.1, P = 0.02)。这表明肉碱代谢途径可能与线粒体功能和氧化应激有关。
Mitochondria are key cytoplasmic organelles in eukaryotic cells that generate adenosine triphosphate (ATP) through the electron transport chain and oxidative phosphorylation. Mitochondrial DNA (mtDNA) copy number (mtDNAcn) is considered a biomarker for both mitochondrial quantity and function as well as cellular oxidative stress level. Previous epidemiologic findings revealed that weight gain, higher body mass index (BMI), smoking, and high insulinemic potential of lifestyle were associated with lower leukocyte mtDNAcn. Carnitines are a group of compounds that play a critical role in energy production. We quantified the associations of plasma L-carnitine levels with leukocyte mtDNAcn. We then examined the association between mtDNAcn and L-carnitine (HMDB0000062) in 538 U.S. men without cancers, diabetes, or cardiovascular disease at blood collection from the Health Professionals Follow-Up Study (HPFS). We found a significant inverse association between L-carnitine and mtDNAcn (ρ = −0.1, P = 0.02). This implies that the carnitine metabolic pathway may be associated with mitochondrial function and oxidative stress.
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