Project description:More and more studies have shown that mRNAs and non-coding RNAs are involved in human diseases and various biological processes of animals, and play an important functional role in animal muscle growth and development. In this study, the expression levels of myogenic marker molecules MYOD1, MYOG, and MyHC increased after cattle muscle stem cells transition from proliferation to differentiation, which promoted the differentiation and maturation of cells. Then, we used RNA sequencing and bioinformatics to analyze the RNA expression of muscle stem cell proliferation phase (GM) and differentiation phase (DM). The results showed that 19,341 protein-coding RNAs (mRNAs) and 12,920 non-coding RNAs participated in the proliferation and differentiation of cattle muscle stem cells. And there were 2,148 differential mRNAs and 888 non-coding RNAs, including 113 miRNAs, 662 lncRNAs, and 113 circRNAs. These differentially expressed mRNAs are enriched in ECM receptor function, cell cycle, TGF-beta, PI3K-Akt and other signaling pathways, covering biological processes such as cell proliferation, invasion, differentiation, and autophagy. At the same time, we verified the expression levels of 7 mRNAs, 3 miRNAs, 2 lncRNAs, and 12 circRNAs by real-time quantitative PCR analysis, and selected circUBE2Q2 for functional verification. The expression profiling analysis showed that circUBE2Q2 was expressed in multiple tissues, and its expression in muscle stem cell differentiation phase was significantly higher than that in proliferation phase. In vitro cell experiments, circUBE2Q2 significantly promoted the differentiation and apoptosis of MuSCs and had no effect on proliferation. It indicates that circRNA plays a role in the muscle development of Guangxi cattle. Our research revealed the role of RNA expression in the proliferation and differentiation of Guangxi cattle muscle stem cells. These results provide new clues for the analysis of the mechanism by which mRNAs and non-coding RNAs regulate the proliferation and differentiation of Guangxi cattle muscle stem cells.
Project description:Liver tissues of Guangxi Ma chicken from 32-week old with m performance, 50-week old with high and low laying performance, and 72-week old with high and low laying performance were collected and sequenced in quadruplicate using RNA-seq. The sequences were double-ended sequenced on the DNBSEQ sequencing platform. The sequence reads were quality controlled and then aligned with genomic sequences using HISAT2 program, quantified by featureCounts program, and gene expression levels were verified by qRT-PCR with SYBR Green detection. The results will be helpful to explore the factors that affecting laying performance from the perspective of yolk synthesis and provide a theoretical basis for improving the egg production of Guangxi Ma chicken.
Project description:Sex condition has been demonstrated to alter meat quality and sex is a major factor that affects the fatty acid composition of lipids of carcass dissectible or intramuscular depot fats. But the possible genetic molecular mechanism of gender causing meat quality differences is not well defined. Qinchuan cattle, Qinghai yak and Guangxi buffalo are three typical indigenous species of cattle in China. Obivious differences of meat quality exist among the three species of cattle. Few studies have been conducted to elucidate the muscle tissue expression of genes involved in pathways and mechanisms leading to meat quality differences beyond the phenotype properties of beef. Bovine Genome Arrays were used to construct muscle expression profiles of the longuissimus dorsi from Qinchuan cattle at 36 months and screen differentially expressed genes in the longuissimus dorsi muscle tissues among different genders of Qinchuan cattle, between Qinchuan cattle and Qinghai yak, and between Qinchuan cattle and Guangxi buffalo.