Interventional effects of different Chinese medicine therapies on proliferation and differentiation of bone marrow mesenchymal stem cells homing to the border zone of myocardial infarction / 中国组织工程研究

ABSTRACT

BACKGROUND:New ideas for regenerative treatment of cardiovascular disease are as fol owsto understand the changes in al kinds of stem cel s differentiating into cardiomyocytes, to determine the physiological role of differentiated stem cel s in cardiac functional activities, to stimulate the proliferative potential of various stem cel s under certain conditions that can directly differentiate into functional cardiomyocytes, thereby replenishing deficient cardiomyocytes and effectively inhibiting excessive proliferation of fibroblasts. OBJECTIVE:To investigate the effects of panax notoginseng saponins, salidroside and astragalus effective components on the homing, proliferation and differentiation of endogenous CD105-positive bone marrow mesenchymal stem cel s of myocardial infarction rats. METHODS:Acute myocardial infarction rats were randomly divided into activating blood circulation group, tonifying qi group, activating blood circulation+tonifying qi group (combined group), model group. Normal rats served as control group. The former three groups were oral y given 80 g/L Xuesaitong soft capsules (panax notoginseng saponins as the main component), 0.5 g/mL astragalus particles and 70 g/L Nuodikang capsules (salidroside as the main component), respectively, at a dose of 1 mL/100 g, once a day, total y for 28 days. The control and model groups were given the same volume of normal saline. Expressions of CD105, CD117, vimentin, cardiac troponin T (cTnT), zinc finger transcription factor 4 (GATA-4) and Ki-67 were detected using immunohistochemical method at 1, 3, 7, 14, 28 days of drug administration. RESULTS AND CONCLUSION:(1) Compared with the control group, the expressions of CD105, CD117, cTnT, GATA-4 and Ki-67 were higher in the model group, which were increased at 1-7 days, peaked at 7 days, and then decreased. Compared with the model group, the expressions of CD105, CD117, cTnT, GATA-4 and Ki-67 were significantly higher in the activating blood circulation group, tonifying qi group and combined group, especial y in the activating blood circulating group, at different time of drug administration (P<0.05). In each group, the staining results of Ki-67 were not exactly paral el to those of CD105, CD117, cTnT and GATA-4, but their rising tendency was substantial y the same. (2) Compared with the control group, the vimentin expression in the model group was higher, which showed an increasing tend at 1-3 days, peaked at 3 days and then declined. Compared with the model group, the vimentin expression was significantly lower in the activating blood circulation group, tonifying qi group and combined group, especial y in the activating blood circulating group, at different time of drug administration (P<0.05). It suggested that the activating blood circulation group had a remarkable antifibrotic role. These findings indicate that panax notoginseng saponins, salidroside and astragalus effective components al can promote the proliferation and differentiation of bone marrow mesenchymal stem cel s to delay myocardial remodeling, but the recipe for promoting blood circulation has the most obvious outcomes.