Sarcopenia is the age-related loss of skeletal muscle mass, strength, and function. It is associated with regenerative difficulties by satellite cells, adult muscle stem cells, and alteration of oxidative management, mainly the increase in superoxide anions (O). We aimed to investigate the relation between regenerative deficit in elderly and increase in O production along with mitochondrial alterations. Myoblasts and myotubes from skeletal muscle of young and elderly healthy subjects (27.8 ± 6 and 72.4 ± 6.5 years old) were measured: (1) superoxide dismutase activity and protein content, (2) mitochondrial O production levels, (3) O production variability, and (4) mitochondrial bioenergetic profile. Compared to young myoblasts, elderly myoblasts displayed decreased SOD2 protein expression, elevated mitochondrial O baseline levels, and decreased oxidative phosphorylation and glycolysis. Additionally, elderly versus young myotubes showed elevated mitochondrial O levels when stressed with N-acetyl cysteine or high glucose and higher glycolysis despite showing comparable oxidative phosphorylation levels. Altogether, the elderly may have less metabolic plasticity due to the impaired mitochondrial function caused by O. However, the increased energy demand related to the differentiation process appears to activate compensatory mechanisms for the partial mitochondrial dysfunction.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6081572 | PMC |
| http://dx.doi.org/10.1155/2018/2615372 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Transcriptomic and Metabolomic Insights Into the Prebiotic Potential of Camellia Seed Oil for Enhancing Proliferation In Vitro.
Food Sci Nutr
January 2025
Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Life Sciences/Institute of Agro-Bioengineering Guizhou University Guiyang China.
Camellia seed oil (CSO), a potential prebiotic agent, can significantly increase the relative abundance of () in mice gut microbiota following oral administration, this study aims to investigate the enhancing effect in vitro. The results showed that after 24-h co-cultivation with 0.5% (v/v) CSO, the growth of increased from 11.
View Article and Find Full Text PDFProteomic and metabolomic profiling of plasma uncovers immune responses in patients with Long COVID-19.
Front Microbiol
December 2024
Key Laboratory of Digital Technology in Medical Diagnostics of Zhejiang Province, Hangzhou, China.
Long COVID is an often-debilitating condition with severe, multisystem symptoms that can persist for weeks or months and increase the risk of various diseases. Currently, there is a lack of diagnostic tools for Long COVID in clinical practice. Therefore, this study utilizes plasma proteomics and metabolomics technologies to understand the molecular profile and pathophysiological mechanisms of Long COVID, providing clinical evidence for the development of potential biomarkers.
View Article and Find Full Text PDFIn depth profiling of dihydrolipoamide dehydrogenase deficiency in primary patients fibroblasts reveals metabolic reprogramming secondary to mitochondrial dysfunction.
Mol Genet Metab Rep
March 2025
The Shmunis School of Biomedicine and Cancer Research, The George S. Wise Faculty for Life Sciences, Sagol School of Neurosciences, Tel Aviv University, 6997801 Tel Aviv, Israel.
Dihydrolipoamide dehydrogenase (DLD) deficiency is an autosomal recessive disorder characterized by a functional disruption in several critical mitochondrial enzyme complexes, including pyruvate dehydrogenase and α-ketoglutarate dehydrogenase. Despite DLD's pivotal role in cellular energy metabolism, detailed molecular and metabolic consequences of DLD deficiency (DLDD) remain poorly understood. This study represents the first in-depth multi-omics analysis, specifically metabolomic and transcriptomic, of fibroblasts derived from a DLD-deficient patient compound heterozygous for a common Ashkenazi Jewish variant (c.
View Article and Find Full Text PDFThe associations between prenatal plastic phthalate exposure and lipid acylcarnitine levels in humans and mice.
Reprod Toxicol
January 2025
Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville 3010, Australia; Murdoch Children's Research Institute, Royal Children's Hospital, Parkville 3010, Australia; Department of Paediatrics, University of Melbourne, Parkville 3010, Australia. Electronic address:
Phthalates are ubiquitous environmental pollutants known for their endocrine-disrupting properties, particularly during critical periods such as pregnancy and early childhood. Phthalates alter lipid metabolism, but the role of prenatal exposure on the offspring lipidome is less understood. In particular, we focused on long chain acylcarnitines - intermediates of fatty acid oxidation that serve as potential biomarkers of mitochondrial function and energy metabolism.
View Article and Find Full Text PDFThe overview of lactylation in the placenta of preeclampsia.
Placenta
January 2025
Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen, China; Shenzhen Key Laboratory on Technology for Early Diagnosis of Major Gynecological Diseases, Shenzhen, China. Electronic address:
Background: Preeclampsia is a major challenge for obstetricians due to its severe impacts on maternal and fetal health. Lysine lactylation (Kla) derived from lactate is a novel type of post-translational modification which has been confirmed to affect the malignant progression of diseases as an epigenetic modifier. However, the systemic lactylome profiling of preeclampsia is still unclear.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!