Project description:Here we found Rosa roxburghii fruit extracts effectively increase TERT expression and telomerase activity in cultured human mesenchymal stem cells. Both Rosa roxburghii fruit extracts by freeze drying and spray drying methods increase the activity of telomerase. Rosa roxburghii fruit freeze drying extracts is able to reduce reactive oxygen species levels, enhance SOD activity and resistance to oxidative stress, and reduce DNA damage caused by oxidative stress or radiation. Rosa roxburghii fruit extracts promoted cell proliferation, improved senescent cell morphology, delayed replicative cellular senescence, attenuated cell cycle supressors and alleviated the senescence-associated secretory phenotype. Transcriptome and metabolic profilings found that Rosa roxburghii fruit extract promote cell proliferation and DNA repair pathways, decreased triglycerides as well. Overall, we provided a theoretical basis for the application of Rosa roxburghii fruit as an anti-aging natural product.
Project description:Genome-wide gene expression analysis of new cardiomyocytes (CMs) derived from resident c-kitpos endogenous cardiac stem cells (eCSCs) after myocardial injury by Isoproterenol (ISO) in mice. These data show that of new CMs derived from resident c-kitpos eCSCs have a gene expression profile that closely resembles the specific gene expression of adult cardiomyocytes. This result supports a role of c-kitpos eCSCs in the regeneration and repair of myocardial damage. To test the identity and the degree of differentiation of new cardiomyocytes (CMs) derived from resident c-kitpos endogenous cardiac stem cells (eCSCs) after myocardial injury by Isoproterenol (ISO) in mice. Global gene expression profiles by microarray was obtained in c-kitpos eCSCs, c-kitpos eCSC-derived YFPpos CMs and normal adult CMs. c-kitposCD45neg eCSCs were isolated from B6.129X1-Gt(ROSA)26Sortm1(EYFP)Cos/J mice and harvested at 4th passage (n=3). YFPpos cardiomyocytes were FACS sorted from left ventricle apex of Lentirius-c-kit/cre recombined B6.129X1-Gt(ROSA)26Sortm1(EYFP)Cos/J mice 28 days after ISO (N=3). Normal adult CMs were isolated from B6.129X1-Gt(ROSA)26Sortm1(EYFP)Cos/J mice (n=3).
Project description:High-throughput sequencing was employed to identify conserved and variable microRNAs among 4 Rosa floral sRNA profiles generated from Rosa (Vital, Marrussia, Simpas, Haedang)
