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Objective To observe the protective effect of Shenmajing formula on brain tissue of mice with cerebral ischemic injury and explore the possible mechanism. Methods Thirty SPF-grade C57 BL/6 male mice were randomly divided into model control group, Shenmajing group and nimodipine group, and the animal models of cerebral ischemic injury in mice were prepared by electrocoagulation. The protein expression level in endothelial progenitor cells were detected by Western blot. Results Compared with the model control group, the infarct volume of mice in the Shenmajing group was significantly reduced, and the migration, adhesion and tubule formation ability of endothelial progenitor cells were significantly improved, and the expression level of BDNF protein in endothelial progenitor cells was significantly increased. Conclusion The protective effect of Shenmajing granules on brain tissue of mice with cerebral ischemic injury could be closely related to the regulation of BDNF expression in endothelial progenitor cells and improvement of endothelial progenitor cell function of bone marrow origin.
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Endothelial progenitor cells (EPC) are stem cells derived from bone marrow and peripheral blood, which could proliferate and differentiate into endothelial cells and participate in repair after tube injury. Studies have shown that the improving function of diabetic EPC could prevent and reduce the occurrence of diabetic complications. The research progress in improving the function of EPC in recent years and the improvement of function in the development of diabetes were reviewed in order to provide new ideas for the treatment of diabetes.
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Objective To study the immunomodulatory effect of Yupingfeng polysaccharides on keratinocytes in vitro.Methods The effects of Yupingfeng polysaccharides on the expression of various inflammatory factors in the activated keratinocytes were detected by the Real-time PCR method.The mRNA and protein expression levels of Filaggrin were detected by Real-time PCR and Elisa respectively.The western bolt assay was used to detect the regulation of NF-κB signaling pathway by polysaccharides.Results Yupingfeng polysaccharides inhibited the secretion of inflammatory factors in the activated keratinocytes, promoted the expression of Filaggrin and exhibited significant inhibitory effect on the NF-κB signaling pathway, which plays an important role in the inflammation and immune response.Conclusion Yupingfeng polysaccharides had an immune regulation effect on skin keratinocytes in vitro and alleviated the development of local inflammation.These results lay a theoretical foundation for the clinical application of Yupingfeng prescription.
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The Hop plant (Humulus lupulus L., Cannabinaceae) is a dioeciou twining perennial.The relevant papers at home and abroad in recent years were reviewed and a summary analysis and induction were conducted to research the progress of hops and provide a basis for further development and application of the medicinal materials.Pharmacological effects of hops were reviewed, which found that hops have a good research prospect and deserve further promotion and development.
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Objective To evaluate the regulation of the TRPV1 receptor on the expression of EGFR protein and the effects on related cell functions.Methods Human pancreatic cancer cells PANC-1 were cultured and treated by over-expression and siRNA.Cell proliferations were detected by CCK-8 experiment.RT-PCR test was used to detect the expression of onco-genes Akt2 and K-ras.Results EGFR protein was down-regulated by TRPV1 over-expression or by agonist activation in pan-creatic cancer cells.EGFR protein was increased by the interference of TRPV 1 expression.The proliferation rate of pancreatic cancer cells was decreased and Akt2,K-ras were significantly inhibited by TRPV1 over-expressing.Conclusion The expres-sion of TRPV1 in pancreatic cancer cells regulated the EGFR protein content.The cell proliferation and oncogene expression were inhibited by TRPV1 over-expressing.
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Objective@#To identify the function of 91-112 amino acids (aa) fragment, the interaction domain of head and stalk of Newcastle disease virus(NDV) HN glycoprotein, and clarify the role of the fragment in promoting cell specific membrane fusion.@*Methods@#The specific gene sequences were identified by aligning 91-112 amino acids of NDV HN protein with amino acids of MeV H, RSV G, hPIV3 HN protein. The fragment deletion, fragment substitution and intermolecular homologous recombination method were combined to construct the deletion mutant, De(HN), and three chimeras, Ch(MeV), Ch(RSV), Ch(hPIV3). Cationic transfection reagent was used to transfect the plasmids into baby hamster kidney cells (BHK-21), in which vaccinia virus-T7 RNA polymerase expression system was expressed. Indirect immunofluorescence assay (IIFA) and flow cytometry (FCM) were executed to analyze the cell surface expression level. Cell fusion promotion activity, receptor recognition activity and neuraminidase activity of each mutant were also detected.@*Results@#Cell surface expression efficiency of De(HN) and Ch(MeV), Ch(RSV), Ch(hPIV3) proteins were 9.04%, 82.20%, 70.16%, 75.65% of that of wild-type (wt) HN. Fusion promotion activity of De(HN), Ch(MeV), Ch(RSV), Ch(hPIV3) were 3.83%, 24.76%, 29.42%, 57.84% of that of wt HN. The fusion promotion activity of De(HN) almost disappeared and syncytium couldn’t be found under the microscope. Hemadsorption activity was 13.48%, 36.25%, 34.93%, 65.22%, respectively (P<0.05), which was consistent with the fusion promotion activity of mutant proteins. Neuraminidase activity was 10.81%, 54.42%, 50.13%, 60.35% of that of wt HN, respectively (P<0.05).@*Conclusions@#The amino acids fragment (91-112) of NDV HN protein plays an important role in promotion fusion. The loss of fusion promotion activity of De(HN) protein was related to the failure of effective cell surface expression of the mutant.