Project description:Although sarcopenia is evident from the fifth decade, mechanisms leading to this phenomenon start earlier, emphasizing the importance of defining biomarkers related to the onset of muscle weakness. To this aim, a transcriptome analysis will be performed on muscle cell cultures (myoblasts) obtained from adult donors of different ages. Any biomarkers identified by this analysis will be confirmed by western blot and immunostatining. We will then assess the role of those biomarkers in muscle aging. Human myoblasts were extracted from the quadriceps of young (15-20 years old) and elderly (>70 years old) healthy subjects . The muscle cell population has been sorted using CD56 MACS beads. The myogenicity and the life span analysis of each muscle cell extract have been determined.
Project description:Transcriptomes of mouse mural granulosa cells were sequenced to identify transcripts expressed in mural granulosa cells of ovaries. Moreover, transcriptomes of cumulus cells were compared between those of young (2 month-old) and old mice (10 month-old) to assess the effects of ageing on cumulus cells. In addition, transcriptomes of cumulus-oocyte complexes were compared between DBA/2 and (C57BL/6 x DBA/2)F1 mice to assess the strain differences.
Project description:Comparison of gene expression pattern profiles of bone derived Ezh2 heterozygous (Het) mesenchymal cells versuss wild type mesenchymal cells isolated from young (3 month old; 3M) and aged (12 month old; 12M) mice.
Project description:Here, we use single-cell RNA-Seq to examine variation between individual hematopoietic stem and progenitor cells from two mouse strains (C57BL/6 and DBA/2) as they age. We prepared libraries from long-term (LT-HSCs) (LSK CD150+CD48-), short-term hematopoietic stem cells (ST-HSCs) (LSK CD150-CD48-) and multipotent progenitors (MPPs) (LSK CD150+CD48+) from young (2-3 months) and old mice (22 months for C57BL/6 and 20 months for DBA/2). Population controls for each cell type and age were isolated by sorting processed in parallel.
Project description:This study investigates the proteomic alterations in brain mitochondria isolated from 5- (mature), 12- (old), and 24-month-old (aged) mice to examine normal "healthy" aging. Using quantitative mass-spectrometry based super-SILAC, our findings revealed global proteomic changes in brain mitochondria identifying several metabolic pathways including glycolysis, the tricarboxylic acid cycle, and oxidative phosphorylation. Overall, we found that the bioenergetic function of these mitochondria was preserved suggesting the proteomic alterations potentially allow for compensatory mechanisms to combat aging.