AIM: To investigate the role of the mitochondrial pathway in JTE-522-induced apoptosis and to investigate the relationship between cytochrome C release, caspase activity and loss of mitochondrial membrane potential (D...AIM: To investigate the role of the mitochondrial pathway in JTE-522-induced apoptosis and to investigate the relationship between cytochrome C release, caspase activity and loss of mitochondrial membrane potential (Deltapsim). METHODS: Cell culture, cell counting, ELISA assay, TUNEL, flow cytometry, Western blot and fluorometric assay were employed to investigate the effect of JTE-522 on cell proliferation and apoptosis in AGS cells and related molecular mechanism. RESULTS: JTE-522 inhibited the growth of AGS cells and induced the apoptosis. Caspases 8 and 9 were activated during apoptosis as judged by the appearance of cleavage products from procaspase and the caspase activities to cleave specific fluorogenic substrates. To elucidate whether the activation of caspases 8 and 9 was required for the apoptosis induction, we examined the effect of caspase-specific inhibitors on apoptosis. The results showed that caspase inhibitors significantly inhibited the apoptosis induced by JTE-522. In addition, the membrane translocation of Bax and cytosolic release of cytochrome C accompanying with the decrease of the uptake of Rhodamin 123, were detected at an early stage of apoptosis. Furthermore, Bax translocation, cytochrome C release, and caspase 9 activation were blocked by Z-VAD.fmk and Z-IETD-CHO. CONCLUSION: The present data indicate a crucial association between activation of caspases 8, 9, cytochrome C release, membrane translocation of Bax, loss of Deltapsim and JTE-522-induced apoptosis in AGS cells.展开更多
OBJECTIVE:To study on effects of Lichong decoction on expression of apoptosis-controlling genes,Bcl-2 and Bcl-2-associated X protein(Bax) mRNAs in hysteromyoma tissue of the hysteromyoma model rat.METHODS:Fifty Wistar...OBJECTIVE:To study on effects of Lichong decoction on expression of apoptosis-controlling genes,Bcl-2 and Bcl-2-associated X protein(Bax) mRNAs in hysteromyoma tissue of the hysteromyoma model rat.METHODS:Fifty Wistar female rats were randomly divided into a normal group,a model group,a Lichong decoction group,a Guizifuling capsule group and a Mifepristone group.The hysteromyoma rat model was established by intraperitoneal injection of exogenous estrin and progestogens.Pathological examination of uterine tissue,uterine coefficient and uterine transverse diameter were made under optic microscope and expressions of Bcl-2 and Bax mRNAs in uterine tissue in the groups were detected with real-time fluorescent quantitative polymerase chain reaction(PCR) technique.RESULTS:After treatment,under microscope it was found that in the Lichong decoction group myometrium thinned,muscle fiber slightly overgrowth or long and thin,regular arrangement,inserting phenomenon of inner circular muscle and external longitudinal muscle was occasionally or not seen in the Lichong decoction group.The uterine coefficient and the uterine transverse diameter significantly decreased(P<0.01),and Bcl-2 mRNA expression significantly decreased(P<0.01) and Bax mRNA expression significantly increased in hysteromyoma tissue(P<0.01) in the Lichong decoction group as compared with the model group.CONCLUSION:Therapeutic effects of Lichong decoction on hysteromyoma is related with decrease of Bcl-2 mRNA expression and increase of Bax mRNA expression.展开更多
OBJECTIVE:To evaluate the effects of baicalin in human gastric cancer cells, including apoptosis-inducing effects, and to investigate its underlying mechanisms of action.METHODS:Cell proliferation and apoptosis assays...OBJECTIVE:To evaluate the effects of baicalin in human gastric cancer cells, including apoptosis-inducing effects, and to investigate its underlying mechanisms of action.METHODS:Cell proliferation and apoptosis assays were performed to investigate the anti-proliferation effects of baicalin in human gastric cancer BGC-823 and MGC-803 cells.Real time-quantitative polymerase chain reaction and Western blotting analysis were performed to elucidate the molecular mechanisms underlying the anti-tumor properties of baicalin.RESULTS:In BGC-823 and MGC-803 gastric cancer cells treated with 80, 120, and 160 μmol/L baicalin for 48 h, a 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide assay showed that baicalin significantly inhibited cell proliferation in a dose-dependent manner, while flow cytometric analysis demonstrated that baicalin could induce apoptosis, also in a dose-dependent manner.Moreover, baicalin up-regulated the expression of caspase-3, caspase-9, and B cell lymphoma(Bcl-2)-associated X protein and down-regulated the expression of Bcl-2 at both the m RNA and protein level.CONCLUSION:Baicalin has potential as a therapeutic agent for gastric cancer by inducing apoptosis in cancer cells.展开更多
OBJECTIVE:To investigate the effects of icariin on apoptosis and the expression of Fas, Fas ligand(Fas L), B cell lymphoma(Bcl-2), and Bcl-2-associated X protein(Bax) in CD4+ T lymphocytes from patients with ankylosin...OBJECTIVE:To investigate the effects of icariin on apoptosis and the expression of Fas, Fas ligand(Fas L), B cell lymphoma(Bcl-2), and Bcl-2-associated X protein(Bax) in CD4+ T lymphocytes from patients with ankylosing spondylitis.METHODS:Primary cultures of peripheral blood CD4+ T lymphocytes were established and treated with icariin at high, medium, and low doses(0.5,0.25, and 0.125 mg/mL).Sulfasalazine treated and helthy cells were used as controls.Apoptosis of treated cells was determined by flow cytometry.Reverse transcription polymerase chain reaction and enzyme-linked immunosorbent assays were used to determine the effects of icariin on the expression of Fas, Fas L, Bcl-2, and Bax.The activity of caspase 8 and caspase 3 was determined by a colorimetric assay.RESULTS:The m RNA and protein expression of Fas,and activity of caspase 8 and caspase 3 in CD4+ T lymphocytes were increased by icariin(P < 0.05).Conversely, the m RNA and protein expression of Bcl-2 was decreased(P < 0.05).The expression of Fas L and Bax were not significantly different between groups.The proapoptotic effects of icariin were dose-dependent.CONCLUSION:Icariin induces the apoptosis of CD4 + T cells from patients with AS comparing to normal control.Therefore, the induction of apoptosis may be the likely mechanism of action of icariin's antirheumatics activities.展开更多
目的探讨C3G基因对H9C2心肌细胞凋亡、增殖的影响及其机制。方法构建RNA干扰慢病毒,购买p CXN2-Flag空质粒和p CXN2-Flag-h C3G过表达人C3G m RNA质粒。分别用空白试剂、阴性慢病毒、C3G si RNA慢病毒、C3G si RNA慢病毒+空质粒、C3G si...目的探讨C3G基因对H9C2心肌细胞凋亡、增殖的影响及其机制。方法构建RNA干扰慢病毒,购买p CXN2-Flag空质粒和p CXN2-Flag-h C3G过表达人C3G m RNA质粒。分别用空白试剂、阴性慢病毒、C3G si RNA慢病毒、C3G si RNA慢病毒+空质粒、C3G si RNA慢病毒+h C3G质粒随机感染和转染H9C2心肌细胞,实验被随机分为5个组,即空白对照组、阴性对照组、沉默C3G组、沉默C3G+空质粒组和沉默C3G+过表达人C3G组。转染质粒72h后,采用RTPCR法检测目的基因C3G m RNA的表达,流式细胞术检测H9C2心肌细胞的凋亡情况,MTT比色法测定细胞增殖率,Western blotting检测细胞C3G、p-ERK1/2、Bax及Flag的蛋白表达水平。结果阴性对照组和沉默C3G组经嘌呤霉素筛选,85%以上细胞被绿色荧光蛋白标记,提示细胞被慢病毒感染。与空白对照组和阴性对照组比较,沉默C3G组和沉默C3G+空质粒组的细胞中Bax蛋白表达水平和细胞凋亡率均明显增加(P<0.01,P<0.05),且这两组细胞C3G m RNA、C3G蛋白、p-ERK1/2蛋白的表达水平和细胞增殖率均明显降低(P<0.01,P<0.05);与沉默C3G组和沉默C3G+空质粒组比较,沉默C3G+过表达人C3G组的细胞中Bax蛋白表达水平和细胞凋亡率明显降低(P<0.01,P<0.05),且细胞中C3G m RNA、C3G蛋白、p-ERK1/2蛋白的表达水平和细胞增殖率则明显增加(P<0.01,P<0.05)。结论沉默C3G基因能有效抑制细胞的增殖,促进H9C2心肌细胞凋亡;过表达C3G基因能逆转沉默C3G基因对H9C2心肌细胞的影响,表现为细胞凋亡减少,增殖明显,其机制可能与C3G基因对p-ERK1/2蛋白和促凋亡分子Bax的调控有关。展开更多
基金National Natural Science Foundation of China,No.39770300,30070873the Overseas Chinese Affairs Office of the State Council Foundation,No.98-33
文摘AIM: To investigate the role of the mitochondrial pathway in JTE-522-induced apoptosis and to investigate the relationship between cytochrome C release, caspase activity and loss of mitochondrial membrane potential (Deltapsim). METHODS: Cell culture, cell counting, ELISA assay, TUNEL, flow cytometry, Western blot and fluorometric assay were employed to investigate the effect of JTE-522 on cell proliferation and apoptosis in AGS cells and related molecular mechanism. RESULTS: JTE-522 inhibited the growth of AGS cells and induced the apoptosis. Caspases 8 and 9 were activated during apoptosis as judged by the appearance of cleavage products from procaspase and the caspase activities to cleave specific fluorogenic substrates. To elucidate whether the activation of caspases 8 and 9 was required for the apoptosis induction, we examined the effect of caspase-specific inhibitors on apoptosis. The results showed that caspase inhibitors significantly inhibited the apoptosis induced by JTE-522. In addition, the membrane translocation of Bax and cytosolic release of cytochrome C accompanying with the decrease of the uptake of Rhodamin 123, were detected at an early stage of apoptosis. Furthermore, Bax translocation, cytochrome C release, and caspase 9 activation were blocked by Z-VAD.fmk and Z-IETD-CHO. CONCLUSION: The present data indicate a crucial association between activation of caspases 8, 9, cytochrome C release, membrane translocation of Bax, loss of Deltapsim and JTE-522-induced apoptosis in AGS cells.
基金Supported by Beijing City Natural Science Fund (No.7082015)National Natural Science Fund (No. 81073096)"Middle-young Aged Core Talent Cultural Plant" of Beijing City University Talent Strengthening Education Plant (No.PHR201008403)
文摘OBJECTIVE:To study on effects of Lichong decoction on expression of apoptosis-controlling genes,Bcl-2 and Bcl-2-associated X protein(Bax) mRNAs in hysteromyoma tissue of the hysteromyoma model rat.METHODS:Fifty Wistar female rats were randomly divided into a normal group,a model group,a Lichong decoction group,a Guizifuling capsule group and a Mifepristone group.The hysteromyoma rat model was established by intraperitoneal injection of exogenous estrin and progestogens.Pathological examination of uterine tissue,uterine coefficient and uterine transverse diameter were made under optic microscope and expressions of Bcl-2 and Bax mRNAs in uterine tissue in the groups were detected with real-time fluorescent quantitative polymerase chain reaction(PCR) technique.RESULTS:After treatment,under microscope it was found that in the Lichong decoction group myometrium thinned,muscle fiber slightly overgrowth or long and thin,regular arrangement,inserting phenomenon of inner circular muscle and external longitudinal muscle was occasionally or not seen in the Lichong decoction group.The uterine coefficient and the uterine transverse diameter significantly decreased(P<0.01),and Bcl-2 mRNA expression significantly decreased(P<0.01) and Bax mRNA expression significantly increased in hysteromyoma tissue(P<0.01) in the Lichong decoction group as compared with the model group.CONCLUSION:Therapeutic effects of Lichong decoction on hysteromyoma is related with decrease of Bcl-2 mRNA expression and increase of Bax mRNA expression.
基金Supported by the Natural Science Foundation of Gansu Province(No.148RJZA073)the Health Industry Scientific Research Project of Gansu Province(No.GWGL 2013-40)the Openning Plan Project of Key Laboratory for Transfer of Dunhuang Medicine at the Provincial and Ministerial Level(No.DHYX1213-008)
文摘OBJECTIVE:To evaluate the effects of baicalin in human gastric cancer cells, including apoptosis-inducing effects, and to investigate its underlying mechanisms of action.METHODS:Cell proliferation and apoptosis assays were performed to investigate the anti-proliferation effects of baicalin in human gastric cancer BGC-823 and MGC-803 cells.Real time-quantitative polymerase chain reaction and Western blotting analysis were performed to elucidate the molecular mechanisms underlying the anti-tumor properties of baicalin.RESULTS:In BGC-823 and MGC-803 gastric cancer cells treated with 80, 120, and 160 μmol/L baicalin for 48 h, a 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide assay showed that baicalin significantly inhibited cell proliferation in a dose-dependent manner, while flow cytometric analysis demonstrated that baicalin could induce apoptosis, also in a dose-dependent manner.Moreover, baicalin up-regulated the expression of caspase-3, caspase-9, and B cell lymphoma(Bcl-2)-associated X protein and down-regulated the expression of Bcl-2 at both the m RNA and protein level.CONCLUSION:Baicalin has potential as a therapeutic agent for gastric cancer by inducing apoptosis in cancer cells.
基金Supported by the Fundamental Research Funds for the Central Public Welfare Research Institutes:Pharmacogenomics of Tripterygium wilfordii Hook F response and liver toxic reaction in Rheumatoid Arthritis(No.ZZ0708079)the Fundamental Research Funds for the Central Public Welfare Research Institutes Pharmacogenomics of Tripterygium wilfordii Hook F response reaction in Rheumatoid Arthritis(No.31470962)
文摘OBJECTIVE:To investigate the effects of icariin on apoptosis and the expression of Fas, Fas ligand(Fas L), B cell lymphoma(Bcl-2), and Bcl-2-associated X protein(Bax) in CD4+ T lymphocytes from patients with ankylosing spondylitis.METHODS:Primary cultures of peripheral blood CD4+ T lymphocytes were established and treated with icariin at high, medium, and low doses(0.5,0.25, and 0.125 mg/mL).Sulfasalazine treated and helthy cells were used as controls.Apoptosis of treated cells was determined by flow cytometry.Reverse transcription polymerase chain reaction and enzyme-linked immunosorbent assays were used to determine the effects of icariin on the expression of Fas, Fas L, Bcl-2, and Bax.The activity of caspase 8 and caspase 3 was determined by a colorimetric assay.RESULTS:The m RNA and protein expression of Fas,and activity of caspase 8 and caspase 3 in CD4+ T lymphocytes were increased by icariin(P < 0.05).Conversely, the m RNA and protein expression of Bcl-2 was decreased(P < 0.05).The expression of Fas L and Bax were not significantly different between groups.The proapoptotic effects of icariin were dose-dependent.CONCLUSION:Icariin induces the apoptosis of CD4 + T cells from patients with AS comparing to normal control.Therefore, the induction of apoptosis may be the likely mechanism of action of icariin's antirheumatics activities.
文摘目的探讨C3G基因对H9C2心肌细胞凋亡、增殖的影响及其机制。方法构建RNA干扰慢病毒,购买p CXN2-Flag空质粒和p CXN2-Flag-h C3G过表达人C3G m RNA质粒。分别用空白试剂、阴性慢病毒、C3G si RNA慢病毒、C3G si RNA慢病毒+空质粒、C3G si RNA慢病毒+h C3G质粒随机感染和转染H9C2心肌细胞,实验被随机分为5个组,即空白对照组、阴性对照组、沉默C3G组、沉默C3G+空质粒组和沉默C3G+过表达人C3G组。转染质粒72h后,采用RTPCR法检测目的基因C3G m RNA的表达,流式细胞术检测H9C2心肌细胞的凋亡情况,MTT比色法测定细胞增殖率,Western blotting检测细胞C3G、p-ERK1/2、Bax及Flag的蛋白表达水平。结果阴性对照组和沉默C3G组经嘌呤霉素筛选,85%以上细胞被绿色荧光蛋白标记,提示细胞被慢病毒感染。与空白对照组和阴性对照组比较,沉默C3G组和沉默C3G+空质粒组的细胞中Bax蛋白表达水平和细胞凋亡率均明显增加(P<0.01,P<0.05),且这两组细胞C3G m RNA、C3G蛋白、p-ERK1/2蛋白的表达水平和细胞增殖率均明显降低(P<0.01,P<0.05);与沉默C3G组和沉默C3G+空质粒组比较,沉默C3G+过表达人C3G组的细胞中Bax蛋白表达水平和细胞凋亡率明显降低(P<0.01,P<0.05),且细胞中C3G m RNA、C3G蛋白、p-ERK1/2蛋白的表达水平和细胞增殖率则明显增加(P<0.01,P<0.05)。结论沉默C3G基因能有效抑制细胞的增殖,促进H9C2心肌细胞凋亡;过表达C3G基因能逆转沉默C3G基因对H9C2心肌细胞的影响,表现为细胞凋亡减少,增殖明显,其机制可能与C3G基因对p-ERK1/2蛋白和促凋亡分子Bax的调控有关。
