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A rat model of metabolic syndrome was induced by high glucose plus high fat diet and treated by tea polyphenols for 10 weeks.The results showed that the levels of fasting blood glucose,triglyceride,cholesterol,low-density lipoprotein cholesterol,and free fatty acid in tea polyphenols treatment group were significantly lower than those in control group(all P＜0.05),along with decreased TNF-α,IFN-γ,iNOS mRNA and protein expressions,and IL-1β protein expression in pancreatictissue (all P＜0.05).Under electron microscope,more secretory granules in islet beta cells and impoveddisorganization of cellular organ were shown in tea polyphenols treatment group compared with metabolic syndrome group.The results suggest that tea polyphenols are able to protect islet β cells against oxidative damage via inhibiting the production of inflammatory cytokines.
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Objective This article was designed to observe the effects of astragalus polysaccharides (APS) on glucose and lipid metabolism, and on expressions of proxisome proliferator activated receptors-α (PPAR-α) and its downstream genes in diabetic hamsters cardiomyopathy. Methods Forty-five hamsters were divided into 3 groups randomly: normal control group (15 normal hamsters), diabetic control group [15 streptozotocin (STZ)-induced diabetic hamsters], and astragalus polysaccharides (APS)-therapy group (15 STZ-induced diabetic hamsters administered with APS 2 g/kg per day orally for 10 weeks). The levels of insulin, C-peptide, myocardial enzymes, glycosylated serum protein (GSP) and lipoprotein of all hamsters were measured. The ultrastructure of myocardium was studied, and the gene and protein expressions of PPAR-α, FATP and ACS were also detected by fluorescent quantitative RT-PCR and Western blot. Results It was shown that Compared with DM group, the levels of GSP, myocardial enzymes and lipoprotein of hamsters in APS-therapy group were lower, the myocardial ultrastructure of hamsters in APS-therapy group was well-protected, and the gene and protein expression of PPAR-α, FATP and ACS of hamsters in APS-therapy group were higher. Conclusions APS is partly effective in treating diabetic cardiomyopathy.
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e tissue and myocardium, as well as myocardial uhrastructure were well-improved; the gene expressions of PPAR-α and GLUT4 were raised in APSgroup. APS may be partially effective in treating diabetic cardiomyopathy.
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@#Objective To investigate the effect of astragalus polysaccharide(APS)on expression of interleukin-4(IL-4)and interferon-γ(IFN-γ)in non-obese diabetic(NOD)mice.Methods 20 NOD mice were randomly divided into the APS group and control group with 10 animals in each group.The mice of the APS group took APS 2 g/kg/d orally for two months.The animals of the control group took same quantity saline.The incidence rate of type 1 diabetes mellitus of two groups was calculated,and pancreatic histopathology was observed with microscope,and expression of IL-4 and IFN-γ were examined with RT-PCR for both APS group and control group.Results The incidence rate of type 1 diabetes mellitus of the APS group was lower than the control group,and histopathology of islets were more protected,expression of IFN-γ was lower and expression of IL-4 was higher in the APS group.Conclusion APS may correct the imbalance of cytokines.
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@# Objective To investigate the change of the serum content of adiponectin in the elderly, and the relationship between hepatic steatosis and the serum content of adiponectin and metabolic syndrome.Methods 264 elderlies were divided into the hepatic steatosis group (87 cases) and control group (177 cases) after B type ultrasonograph examination. The height, weight, waist circumference and levels of serum lipid, glucose, insulin and adiponectin of all cases in the two groups were measured. The relationship between above variables and hepatic steatosis was analyzed. The multiple logistic regression analysis was used to test the efficacy of adiponectin and metabolic syndrome for predicting the probability of having hepatic steatosis in the elderly.Results For the hepatic steatosis group, the serum content of adiponectin was significantly lower than that of the control group ( P<0.01), the frequency of metabolic syndrome was significantly higher than that of the control group ( P<0.01), and the body mass index, waist circumference, blood glucose (fasting blood glucose and postprandial blood glucose), homeostasis model assessment-insulin resistance index, total cholesterol, triglyceride and low density lipoprotein cholesterol increased and high density lipoprotein cholesterol decreased. Logistic regression analysis showed that serum content of adiponectin and metabolic syndrome were associated with the probability of hepatic steatosis.Conclusion The serum content of adiponectin and metabolic syndrome are useful indices for the prediction of hepatic steatosis.
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Objective To investigate the relationship between serum insulin-like growth factor 1 (IGF1) and metabolic syndrome ( MS) . Methods Four hundred and sixty-five subjects were enrolled and divided into two groups: MS group( n = 255) and non-MS group as control(n = 210). Fasting levels of blood glucose (FBG), insulin (Ins) , C peptide (Cp) , cholesterol (Cho) , triglyceride (TG), lower-density lipoprotein cholesterin ( LDL-C) , higher-density lipoprotein cholesterin ( HDL -C), lipoprotein a (Lpa), serum IGF1, postprandial 2 hours blood glucose (PBG), and BMI were measured in these persons. Results The levels of IGF1, Cp, FBG, PBG, CT, TG, LDL-C, BMI were higher, and HDL-C was lower in MS group than those in non-MS group (all P
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Purpose To observe the effects of the intervention or prevention of astragalus polysaccharide(APS)on type 1 diabetes in non-obese diabetic(NOD) mice. Methods the APS group was compared withthe normal solution(NS)group by the incidence of diabetes, the serum C-peptide levels and GAD-Ab levels,the proportion of CD4 or CD8 T subsets in splencytes, pancreatic histopathology and immunocyto-chemistry.Results It shows that the APS group has lower incidence of diabetes, higher serum C-P levels, decreaseddegree of the lymphocytic inflammation of pancreatic islets, stronger proliferation of CD8 T subsets and lowerratio of CD4/CD8 subgroup in splencytes than those of the NS group. Conclusions It proves thepreventive effects of APS on the onset of type 1 diabetes in NOD mice.
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PurposeTo investigate the effect of gasoline on the skin barrier function.MethodsA rat skin model in vitro was used in this study. The amount of 3H-water penetrated throught the skin was applied as the index of evaluating the barrier function.ResultsThe results showed that the amount of 3H-water was not obviously increased in those exposed to gasoline for 0.5,1 and 2 h(P > 0.05), but the 3H-water penetration amount through the skin increased linearly with the time. In the group exposed to gasoline 4 h, the 3H-water penetration amount through the skin was significantly higher than that in the control group (P 0.05). The skin barrier function of the group (expopsed to gasoline 4 h) was disrupted.Conclusions Gasoline may disrupt the skin barrier function. Gasoline would remove the lipids within the intercellular domains of the stratum corneum and then lead to damage the skin.
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Objective To further investigate the molecular mechanism underlying the preventive effect of Astragalus polysaccharide (APS) on type 1 diabetes mellitus (DM) in NOD mice. Methods In order to explore the gene expression profiles of NOD mice′s islet cells treated with APS, cDNA microarray technique was applied. Results In APS group 5.47% gene expressions were obviously changed, 28 genes up-regulated, 35 genes down-regulated, and of which, 17 genes were functionally related to immunity. Conclusion The preventive effect of APS on type 1 diabetes in NOD mice is probably related to the action of APS in correcting the imbalance of Th 1/Th 2 cytokines.
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Objective To observe the effect of BCtIGF-1 on diabetic nephropathy and explore its mechanism. Methods Techniques including biochemistry, radioimmunoassay, fluoroassays, molecular biology(HT-PCR) were used in this study. Results (1) Serum FBG, TG and FMN concentrations in BCtIGF-1 groups were significantly lower than those of diabetic control group; (2) 24h UAER, 24h urinary volume in BCtIGF-1 groups were significantly lower than those of diabetic control group; (3) BCtIGF-1 had protective effect on diabetic nephropathy by observing the kidney tissues with electron microscope; (4) Kidney IGF-1mRNA in diabetic control group was significantly lower than that of normal control group, no differences were found between diabetic control group and BCtIGF-1 groups; (5) Collagen and AGEs of kidney tissue, urinary TXB2/6-keto-PGF1a in BCtIGF-1 groups were significantly lower than those of diabetic control group; Conclusions (1) BCtIGF-1 has hypoglybemic and hypolipidic effects; (2) BCtIGF-1 does not increase the level of IGF-1mRNA in kidney tissue; (3) BCtIGF-1 might have protective effect on diabetic nephropathy. The protective mechanism may be associated with its hypoglycemic and hypolipidic effects; in addition, it might relate to the improvement of PGI2-TXA2 synthetic imbalance and the reduction of the collagen and AGEs levels in kidney tissue.
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Objective To investigate the role of monoclonal antibody of insulin-like growth factor Ⅰ receptor (IGF-ⅠR) in the proliferation and apoptosis of papillary thyroid carcinoma cell line CGTH W-3, and the effect of IGF-ⅠR monoclonal antibody on papillary thyroid carcinoma cells and normal follicular cells in primary culture. Methods MTT and TUNEL method were used to determine the proliferation and apoptosis of cells respectively after IGF-ⅠR monoclonal antibody intervention. Results The inhibitory effect on cell proliferation was enhanced with the increasing IGF-ⅠR monoclonal antibody concentration and duration of action. IGF-ⅠR monoclonal antibody induced apoptosis of CGTH W-3 cells remarkably even in the concentration of 50 nmol/L. Primary papillary thyroid carcinoma cells and normal follicular cells were inhibited by 100 nmol/L IGF-ⅠR monoclonal antibody, and the degree of inhibition was significantly higher in carcinoma cells than that in normal follicular cells (P
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Objective To observe the effect of tea polyphenols on proliferation, invasion and apoptosis of human thyroid papillary carcinoma cells (CGTH W-3) in vitro. Methods The effects of various concentrations of tea polyphenols on proliferation, invasion and apoptosis of CGTH W-3 cells were observed by MTT assay, plate scarification assay and flow cytometer, respectively. Results Tea polyphenols(50-400 mg/L) inhibited the proliferation of CGTH W-3 cells with dose-and time-dependent manners. The IC_50 of tea polyphenols to CGTH W-3 cells was 240 mg/L (1st day), 229 mg/L (3 rd day), 200 mg/L (5th day) and 118 mg/L (7th day). The cell free zoster which reflected the invasive ability was widened by tea polyphenols. The apoptosis percentage of CGTH W-3 cells incubated with tea polyphenols for 48 h was obviously increased, with 3.51% in control group, 12.61% with 100 mg/L tea polyphenols, 52.97% with 200 mg/L tea polyphenols and 70.79% with 400 mg/L tea polyphenols (all P