AIM:To explore the mechanism of action of gypenosides(GPs)on type 2 diabetes mellitus and non-alcoholic fatty liver disease(T2DM-NAFLD)in rats.METHODS:Sixty rats were randomly divided into a healthy group,an untreated...AIM:To explore the mechanism of action of gypenosides(GPs)on type 2 diabetes mellitus and non-alcoholic fatty liver disease(T2DM-NAFLD)in rats.METHODS:Sixty rats were randomly divided into a healthy group,an untreated disease model group andGP-treatment groups.The study involved the evaluation of biochemical parameters,including serum aspartate transaminase(AST),alanine transferase(ALT),blood glucose(BG),triglycerides(TG)and total cholesterol(TC).Additionally,the protective effect of the treatments were confirmed histopathologically and the expression of TNF-αand NF-κB in the rat liver was analyzed using immunohistochemistry.The expression of proliferatoractivated receptor gamma(PPARγ)and cytochrome P450(CYP450)1A1 m RNA was determined by quantitative RTPCR.RESULTS:GP treatments at oral doses of 200,400,and800 mg/kg per day significantly decreased the levels of serum AST and ALT(P<0.05,P<0.01),especially at the dose of 800 mg/kg per day.To a similar extent,GP at800 mg/kg per day reduced the levels of BG(4.19±0.47,P<0.01),TG(80.08±10.05,P<0.01),TC(134.38±16.39,P<0.01)and serum insulin(42.01±5.04,P<0.01).The expression of TNF-αand NF-κB measured by immunohistochemistry was significantly reduced by GPs in a dose-dependent manner,and the expression of PPARγand CYP4501A1 m RNA,as measured using quantitative real-time PCR,were significantly down-regulated by GPs.Moreover,GPs decreased the infiltration of liver fats and reversed the histopathological changes in a dosedependent manner.CONCLUSION:This study suggests that GPs have a protective effect against T2DM-NAFLD by down-regulating the expression of TNF-αand NF-κB proteins,and PPARγand CYP4501A1 m RNAs.展开更多
Neural stem cell has a potential to differentiate into neurons, astrocytes and oligodendrocytes. It provides an in vitro model to screen herbal medicines on the cellular differentiation and development level. In this ...Neural stem cell has a potential to differentiate into neurons, astrocytes and oligodendrocytes. It provides an in vitro model to screen herbal medicines on the cellular differentiation and development level. In this work, active component from gypenosides and soyasaponins was prepared to investigate their effects on the differentiation of neural stem cells.. Both gypenosides and soyasaponins promote the differentiation of neural stem cells. This method provides speed and practicality for screening effective herbal medicine. It is well suited for studying the mechanism of cell differentiation and development.展开更多
AIM：To determine whether gypenosides have protective effects in experimental autoimmune optic neuritis（EAON）.METHODS：Mice were randomly divided into seven groups：control group,model group,three different density ...AIM：To determine whether gypenosides have protective effects in experimental autoimmune optic neuritis（EAON）.METHODS：Mice were randomly divided into seven groups：control group,model group,three different density gypenosides monotherapy,methylprednisolone monotherapy,combination of gypenosides and methylprednisolone group.The control group was subcutaneously injected with oil emulsion adjuvant and all other groups were subcutaneously immunized with an emulsified mixture of myelin oligodendrocyte glycoprotein（MOG） 35-55 peptide to induce EAON.Mice in the gypenosides groups were administered injections daily with three concentrations（15 mg/kg,30 mg/kg,45 mg/kg） of gypenosides respectively.Mice in the methylprednisolone group and the combination treatment group were injected daily with methylprednisolone（20 mg/kg） or methylprednisolone（20 mg/kg） ＋ gypenosides（30 mg/kg）,respectively.After MOG immunization,visual evoked potential（VEP）,optical coherence tomography（OCT）,and histopathologic examination were performed at 14,20,30,and 40 d post-inoculation（p.i.）.All results were expressed as mean±SEM.The data were evaluated by oneway ANOVA followed by Tukey or Games-Howell test.RESULTS：Compared with the control group,p2 latency was prolonged in the model group（P=0.041）.Combination treatment can alleviated the change in VEP at 20 d p.i.（P=0.012）.Average peripapillary retinal nerve fiber layer（RNFL） thickness was reduced in the model group（P= 0.000,30d;P=0.000,40d） and gypenosides treatment remarkably diminished the degree of RNFL degenerationat 30 d and 40 d p.i（P=0.000,30d;P=0.000,40d）.The pathomorphological results showed a decrease in demyelination（P=0.020） and inflammatory reactions in the combination group compared with the model group（20d p.i.）.Gypenosides treatment also alleviated the degree of axonal loss（40d p.i.）（P=0.003）.CONCLUSION：Treatment with gypenosides exerts protective effects on retinal nerve fibers and axons in EAON.When combined with gypenosides,methylprednisolone reduces demyelination in the acute stage of EAON.展开更多
Gynostemma pentaphyllum,also called"Southern Ginseng"in China,is a traditional Asian folk medicinal plant.Gypenosides(Gps)are the biologically active constituents of G.pentaphyllum,which have been reported w...Gynostemma pentaphyllum,also called"Southern Ginseng"in China,is a traditional Asian folk medicinal plant.Gypenosides(Gps)are the biologically active constituents of G.pentaphyllum,which have been reported with hypoglycemic activity.However,the underlying mechanisms are unclear.The effects of two Gps(Gp-Ⅰand Gp-Ⅱ)on type 2 diabetic mellitus(T2DM)mice,induced by high-fat and high-sugar diet and streptozotocin,were evaluated to explore the mechanism of their hypoglycemic actions.Gps reduced fasting blood glucose and serum lipids,as well as significantly improved T2DM mice glucose tolerance and insulin resistance(IR).After Gps treatment,the severity of liver injury was reduced and liver glycogen content increased.In addition,Gps promoted the phosphorylation of adenosine monophosphate-activated protein kinase(AMPK),and downregulated the key proteins phosphoenolpyruvate carboxy kinase and glucose-6 phosphatase,in the AMPK signaling pathway.Thus,our study suggests that Gps mediate hepatic gluconeogenesis and improve IR via activating AMPK signaling pathway in T2DM mice.展开更多
The significant inhibition action of Gypenosides (GP) to many kinds or tumor strain wesreported before. The erfects of GP on the ultrastructures, without any findiys in present litrature,of S-180 sarcoma in mouse were...The significant inhibition action of Gypenosides (GP) to many kinds or tumor strain wesreported before. The erfects of GP on the ultrastructures, without any findiys in present litrature,of S-180 sarcoma in mouse were studied through electron microscope in this article. The results indicated that the ultrastructures of.S-180 sarcoma cells were destructed obviously by the administratiouof GP to the tumor-bearing mouse with a Pattern or dose-depeudant, especially to the cellular nuclear. We saw both apoptosis and necrosis in morphologic alterations in tumor cells, suck as a reductionin cellular volume. an increase in cytoplasm, uucleoplasm electron density and condensation of nuclear chromatiu either to periphery or the nuclear membrane or inclumps within the cell, lots of inthe cytoplasm and apoptotic body in some turner cells or some cytoplast breaking into small frag- ments etc.展开更多
基金Supported by Bureau of Public Health of Hubei Province
文摘AIM:To explore the mechanism of action of gypenosides(GPs)on type 2 diabetes mellitus and non-alcoholic fatty liver disease(T2DM-NAFLD)in rats.METHODS:Sixty rats were randomly divided into a healthy group,an untreated disease model group andGP-treatment groups.The study involved the evaluation of biochemical parameters,including serum aspartate transaminase(AST),alanine transferase(ALT),blood glucose(BG),triglycerides(TG)and total cholesterol(TC).Additionally,the protective effect of the treatments were confirmed histopathologically and the expression of TNF-αand NF-κB in the rat liver was analyzed using immunohistochemistry.The expression of proliferatoractivated receptor gamma(PPARγ)and cytochrome P450(CYP450)1A1 m RNA was determined by quantitative RTPCR.RESULTS:GP treatments at oral doses of 200,400,and800 mg/kg per day significantly decreased the levels of serum AST and ALT(P<0.05,P<0.01),especially at the dose of 800 mg/kg per day.To a similar extent,GP at800 mg/kg per day reduced the levels of BG(4.19±0.47,P<0.01),TG(80.08±10.05,P<0.01),TC(134.38±16.39,P<0.01)and serum insulin(42.01±5.04,P<0.01).The expression of TNF-αand NF-κB measured by immunohistochemistry was significantly reduced by GPs in a dose-dependent manner,and the expression of PPARγand CYP4501A1 m RNA,as measured using quantitative real-time PCR,were significantly down-regulated by GPs.Moreover,GPs decreased the infiltration of liver fats and reversed the histopathological changes in a dosedependent manner.CONCLUSION:This study suggests that GPs have a protective effect against T2DM-NAFLD by down-regulating the expression of TNF-αand NF-κB proteins,and PPARγand CYP4501A1 m RNAs.
基金Project supported by the National Basic Research Program of China （Grant No.2006CB500702）, the National Natural Science Foundation of China （Grant No.30570590）, and the Science Foundation of Shanghai Municipal Commission of Science and Technology （Grant No.03JC14030）
文摘Neural stem cell has a potential to differentiate into neurons, astrocytes and oligodendrocytes. It provides an in vitro model to screen herbal medicines on the cellular differentiation and development level. In this work, active component from gypenosides and soyasaponins was prepared to investigate their effects on the differentiation of neural stem cells.. Both gypenosides and soyasaponins promote the differentiation of neural stem cells. This method provides speed and practicality for screening effective herbal medicine. It is well suited for studying the mechanism of cell differentiation and development.
基金Supported by the National Natural Science Foundation of China(No.81260149No.81360152No.81560162)
文摘AIM：To determine whether gypenosides have protective effects in experimental autoimmune optic neuritis（EAON）.METHODS：Mice were randomly divided into seven groups：control group,model group,three different density gypenosides monotherapy,methylprednisolone monotherapy,combination of gypenosides and methylprednisolone group.The control group was subcutaneously injected with oil emulsion adjuvant and all other groups were subcutaneously immunized with an emulsified mixture of myelin oligodendrocyte glycoprotein（MOG） 35-55 peptide to induce EAON.Mice in the gypenosides groups were administered injections daily with three concentrations（15 mg/kg,30 mg/kg,45 mg/kg） of gypenosides respectively.Mice in the methylprednisolone group and the combination treatment group were injected daily with methylprednisolone（20 mg/kg） or methylprednisolone（20 mg/kg） ＋ gypenosides（30 mg/kg）,respectively.After MOG immunization,visual evoked potential（VEP）,optical coherence tomography（OCT）,and histopathologic examination were performed at 14,20,30,and 40 d post-inoculation（p.i.）.All results were expressed as mean±SEM.The data were evaluated by oneway ANOVA followed by Tukey or Games-Howell test.RESULTS：Compared with the control group,p2 latency was prolonged in the model group（P=0.041）.Combination treatment can alleviated the change in VEP at 20 d p.i.（P=0.012）.Average peripapillary retinal nerve fiber layer（RNFL） thickness was reduced in the model group（P= 0.000,30d;P=0.000,40d） and gypenosides treatment remarkably diminished the degree of RNFL degenerationat 30 d and 40 d p.i（P=0.000,30d;P=0.000,40d）.The pathomorphological results showed a decrease in demyelination（P=0.020） and inflammatory reactions in the combination group compared with the model group（20d p.i.）.Gypenosides treatment also alleviated the degree of axonal loss（40d p.i.）（P=0.003）.CONCLUSION：Treatment with gypenosides exerts protective effects on retinal nerve fibers and axons in EAON.When combined with gypenosides,methylprednisolone reduces demyelination in the acute stage of EAON.
基金supported by the National Natural Science Foundation of China(81602983)。
文摘Gynostemma pentaphyllum,also called"Southern Ginseng"in China,is a traditional Asian folk medicinal plant.Gypenosides(Gps)are the biologically active constituents of G.pentaphyllum,which have been reported with hypoglycemic activity.However,the underlying mechanisms are unclear.The effects of two Gps(Gp-Ⅰand Gp-Ⅱ)on type 2 diabetic mellitus(T2DM)mice,induced by high-fat and high-sugar diet and streptozotocin,were evaluated to explore the mechanism of their hypoglycemic actions.Gps reduced fasting blood glucose and serum lipids,as well as significantly improved T2DM mice glucose tolerance and insulin resistance(IR).After Gps treatment,the severity of liver injury was reduced and liver glycogen content increased.In addition,Gps promoted the phosphorylation of adenosine monophosphate-activated protein kinase(AMPK),and downregulated the key proteins phosphoenolpyruvate carboxy kinase and glucose-6 phosphatase,in the AMPK signaling pathway.Thus,our study suggests that Gps mediate hepatic gluconeogenesis and improve IR via activating AMPK signaling pathway in T2DM mice.
文摘The significant inhibition action of Gypenosides (GP) to many kinds or tumor strain wesreported before. The erfects of GP on the ultrastructures, without any findiys in present litrature,of S-180 sarcoma in mouse were studied through electron microscope in this article. The results indicated that the ultrastructures of.S-180 sarcoma cells were destructed obviously by the administratiouof GP to the tumor-bearing mouse with a Pattern or dose-depeudant, especially to the cellular nuclear. We saw both apoptosis and necrosis in morphologic alterations in tumor cells, suck as a reductionin cellular volume. an increase in cytoplasm, uucleoplasm electron density and condensation of nuclear chromatiu either to periphery or the nuclear membrane or inclumps within the cell, lots of inthe cytoplasm and apoptotic body in some turner cells or some cytoplast breaking into small frag- ments etc.
