RESUMEN
BACKGROUND: Pearl has the tranquilizing effect, and it can be applied in the treatment of hypertension. However, there is little report on the prevention and cure effect and mechanism of hydrolyzed pearl liquid on hypertension. OBJECTIVE: To observe the effect of hydrolysis of Hepu pearl (hydrolyzed Nanzhu fluid) on the biological behavior and secretion of human microvascular endothelial cells. METHODS: Human microvascular endothelial cells were cultured and passaged. There were four groups, and the microvascular endothelial cells were incubated in the 200 μL culture medium containing nothing (control group), and 120, 60 and 30 mg/L hydrolysis of Nanzhu fluid. The cell proliferation and migration was detected by cell conuting kit-8 assay and Transwell assay respectively; the cell cycle distribution was tested by flow cytometry; the cell apoptosis was assayed by TUNEL method; the secretion of nitric oxide and reactive oxygen species was tested by nitrale reduetase and chemical fluorescence method, respectively. RESULTS AND CONCLUSION: Compared with the control group, hydrolysis of Nanzhu fluid significantly promoted the proliferation of microvascular endothelial cells in a manner-dependent manner (P ＜ 0.05), suggesting the optimal concentration was 120 mg/L. Compared with the control group, the percentage of cells in S and G2 phase was significantly increased, and the percentage of cells in the G1 phase was significantly reduced in the hydrolysis of Nanzhu fluid group (P＜0.05), indicating hydrolysis of Nanzhu fluid could promote cell cycle progression. Apoptotic cells with green-stained nucleus were invisible in both groups. The number of cell migration in the hydrolysis of Nanzhu fluid group was significantly more than that in the control group (P ＜ 0.05). Compared with the control group, there was a significant increase in the nitric oxide secretion, and a significant decrease in the production of reactive oxygen species in the hydrolysis of Nanzhu fluid group (P＜0.05). To conclude, hydrolysis of Nanzhu fluid can promote the proliferation and migration of human microvascular endothelial cells in vitro, and has the function of promoting the secretion of nitric oxide and inhibiting reactive oxygen species secretion, implying its positive role in the protection of endothelial cell function.
RESUMEN
BACKGROUND: Inadequate sources of islet cells mean that islet cell transplantation for diabetes cannot meet the clinical demand.Therefore,in vitro induction of pancreatic stem cells to differentiate into islets has become a focus of research. OBJECTIVE:To study the effect of Tripterygium wilfordii polysaccharides on the differentiation of pancreatic stem cells from islets in mice, so as to explore the effect of traditional Chinese medicine on the differentiation of pancreatic stem cells into pancreatic beta cells. METHODS:Tripterygium wilfordii polysaccharide was used to induce the differentiation of purified mouse pancreatic stem cells into islets in vitro.The islet-like cell clusters then underwent morphologic observation, dithizone (DTZ) staining, and western blot analysis. RESULTS AND CONCLUSION: Cell morphology, cell growth characteristics and immunocytochemical staining showed that mouse pancreatic stem cells were obtained.They were induced by Tripterygium wilfordii polysaccharide into spherical islet-like structures, which had a spindly pedicle connected with the bottom of the culture flask, and were DTZ-stained to iron red. Western blot assay detected β-cytokine proteins in the islet-like cell clusters. These findings confirm that mouse pancreatic stem cells can be induced to differentiate into islet-like cell clusters containing β cells in vitro by Tripterygium wilfordii polysaccharide.