The significantly enriched GO terms and KEGG pathways for up regulated genes can be categorized into several biological functional groups including ECM and cytoskeleton based processes, signal transduction, selleck stress response, tissue regeneration and remodelling, muscle hypertrophy, as well as angiogen esis, whereas down regulated genes significantly enriched a list of GO terms and KEGG pathways rele vant to mitochondrial structure and oxidative phosphor ylation activity, proteolysis, and transcription and translation. Female 24 h post. In a separate group of females, we observed in the exercised vs. rested muscle, that seven GO terms and three KEGG pathways were significantly enriched with up regulated genes and that 13 GO terms and one KEGG pathways with down regulated genes.
Most consistently, the significantly enriched biological GO terms and KEGG pathways for up regulated genes were related to gene translation and protein biosynthesis. Validation of subset of genes by quantitative real time PCR Ten genes were Inhibitors,Modulators,Libraries selected for validation by qRT PCR. These genes represented seven significantly regulated biological processes by RE, as identified by microarray analysis, including up regulated growth factor activity, angiogenesis, stress response, exercise response, down regulated muscle protein catabolic metabolism, lipid metabolism, and carbohydrate metabolism. These genes were selected based on their known effect in exercise physiology and reported exercise responsiveness. Correlation analysis using Spearmans rank order correlation indicated a strong concordance between fold changes of gene expression tested by microarrays and qRT PCR in our study.
Because muscle tissue available for qRT PCR analysis was limited, sample size was not adequate for testing gene expression changes following RE for each of the four sex and time specific conditions. As such, we Inhibitors,Modulators,Libraries compared mRNA levels of the selected genes in male and female muscles in the resting state. Consis tent with microarray analysis, no significant sex differ ences Cilengitide were indicated for these genes with the exception of ALDH2. In both the microarray and qRT PCR, ALDH2 showed higher expression Inhibitors,Modulators,Libraries levels in females than in males. The mean fold changes of the expression of these genes in exercised vs. rested muscle for each sex and time specific condition are presented in supplementary materials.
Discussion In the Inhibitors,Modulators,Libraries present study, we used a novel analytic design to identify sex differences in the human muscle transcrip tome in both the resting state and during recovery from acute resistance exercise. In the resting state, female muscle had a greater transcript abundance of genes involved in fatty acid oxidation and gene tran scription translation processes. After LB42708? strenuous RE at the same relative intensity, transcriptional modulation follows a different time course in male and female mus cles.