AIM To investigate the clinical features ofFADD and TRADD expressions in primaryhepatocellular carcinoma(HCC)and todetermine their relationship with hepaticapoptosis.METHODS FADD and TRADD expressions weredetected by ...AIM To investigate the clinical features ofFADD and TRADD expressions in primaryhepatocellular carcinoma(HCC)and todetermine their relationship with hepaticapoptosis.METHODS FADD and TRADD expressions weredetected by immunohistochemistry and hepaticapoptosis were determined by in situ end-labeling(ISEL).RESULTS Ten(25.6%)cases of HCC weredetected to express FADD protein.The positiverate in HCC is lower than that in non-cancerousadjacent liver tissues(62.5%)(P【0.05).Inthose of grade Ⅰ-Ⅱ,8(38.1%)cases wereFADD positive,while only 2/18(11.1%)casesof grade Ⅲ-Ⅳ had detectable FADD protein(P【0.05).No relationship was found betweenFADD expression and other clinical features,such as gender,age,tumor size,differentiationor metastasis.ISEL positive cells can be seen inall cases of HCC.The hepatic apoptosis wasassociated with FADD expression as moreapoptotic cells were detected in those caseswhich had moderately to strongly positiveFADD,as compared with negative or weakpositive FADD cases(P【0.05).No relationshipwas found between FADD expression and hepaticapoptosis in non-cancerous adjacent livertissues.Fifteen of 39(38.5%)cases of HCCwere found positive for TRADD protein,andsimilar positive rate(37.5%)in non-cancerousadjacent liver tissues(P】0.05).The expressionof TRADD is correlated with HCC differentiation, as only 22.2% of moderately to highlydifferentiated HCC showed positive TRADDprotein,while as high as 52.4% of poorlydifferentiated HCC had TRADD(P【0.05),Norelationship was found between TRADDexpression and gender,age,tumor size or gradeor metastasis,although 42.9% of HCC of gradeⅠ/Ⅱ showed positive TRADD which wasslightly higher than that of grade Ⅲ/Ⅳ(33.3%,P】0.05).Hepatic apoptosis was not related toTRADD expression in HCC or non-cancerousadjacent liver tissues.CONCLUSION Loss of FADD expression playsan important role in HCC carcinogenesis,andexpression of TRADD also contributes to HCCdevelopment.The cell apoptosis in HCC isassociated with FADD expression.However,theexpression of TR展开更多
目的探讨大鼠脑缺血再灌注后神经细胞凋亡及Fas凋亡通路相关因子Fas相关死亡域蛋白(fas-associated death domain,FADD)、半胱天冬酶-8(Caspase-8)及Flice(即Caspase-8)抑制蛋白(FLICEProfilin,FLIP)的mRNA及蛋白表达。方法线栓法制备...目的探讨大鼠脑缺血再灌注后神经细胞凋亡及Fas凋亡通路相关因子Fas相关死亡域蛋白(fas-associated death domain,FADD)、半胱天冬酶-8(Caspase-8)及Flice(即Caspase-8)抑制蛋白(FLICEProfilin,FLIP)的mRNA及蛋白表达。方法线栓法制备大脑中动脉梗死模型(MCAO),TUNEL法检测神经细胞凋亡,RT-PCR法及免疫组化法检测不同实验组中FADD、Caspase-8及FLIP的mRNA及蛋白表达。结果大鼠脑缺血再灌注后各时间点神经细胞凋亡,FADD、Caspase-8及FLIP的mRNA和蛋白表达均明显增强(P<0.05～0.001)。结论大鼠脑缺血再灌注后神经细胞凋亡数增加,Fas-FADD-Caspase-8凋亡通路可能为其重要凋亡通路之一,抗凋亡因子FLIP mRNA和蛋白表达短暂升高,可能有拮抗脑缺血再灌注后神经细胞凋亡的作用。展开更多
文摘AIM To investigate the clinical features ofFADD and TRADD expressions in primaryhepatocellular carcinoma(HCC)and todetermine their relationship with hepaticapoptosis.METHODS FADD and TRADD expressions weredetected by immunohistochemistry and hepaticapoptosis were determined by in situ end-labeling(ISEL).RESULTS Ten(25.6%)cases of HCC weredetected to express FADD protein.The positiverate in HCC is lower than that in non-cancerousadjacent liver tissues(62.5%)(P【0.05).Inthose of grade Ⅰ-Ⅱ,8(38.1%)cases wereFADD positive,while only 2/18(11.1%)casesof grade Ⅲ-Ⅳ had detectable FADD protein(P【0.05).No relationship was found betweenFADD expression and other clinical features,such as gender,age,tumor size,differentiationor metastasis.ISEL positive cells can be seen inall cases of HCC.The hepatic apoptosis wasassociated with FADD expression as moreapoptotic cells were detected in those caseswhich had moderately to strongly positiveFADD,as compared with negative or weakpositive FADD cases(P【0.05).No relationshipwas found between FADD expression and hepaticapoptosis in non-cancerous adjacent livertissues.Fifteen of 39(38.5%)cases of HCCwere found positive for TRADD protein,andsimilar positive rate(37.5%)in non-cancerousadjacent liver tissues(P】0.05).The expressionof TRADD is correlated with HCC differentiation, as only 22.2% of moderately to highlydifferentiated HCC showed positive TRADDprotein,while as high as 52.4% of poorlydifferentiated HCC had TRADD(P【0.05),Norelationship was found between TRADDexpression and gender,age,tumor size or gradeor metastasis,although 42.9% of HCC of gradeⅠ/Ⅱ showed positive TRADD which wasslightly higher than that of grade Ⅲ/Ⅳ(33.3%,P】0.05).Hepatic apoptosis was not related toTRADD expression in HCC or non-cancerousadjacent liver tissues.CONCLUSION Loss of FADD expression playsan important role in HCC carcinogenesis,andexpression of TRADD also contributes to HCCdevelopment.The cell apoptosis in HCC isassociated with FADD expression.However,theexpression of TR
文摘目的探讨大鼠脑缺血再灌注后神经细胞凋亡及Fas凋亡通路相关因子Fas相关死亡域蛋白(fas-associated death domain,FADD)、半胱天冬酶-8(Caspase-8)及Flice(即Caspase-8)抑制蛋白(FLICEProfilin,FLIP)的mRNA及蛋白表达。方法线栓法制备大脑中动脉梗死模型(MCAO),TUNEL法检测神经细胞凋亡,RT-PCR法及免疫组化法检测不同实验组中FADD、Caspase-8及FLIP的mRNA及蛋白表达。结果大鼠脑缺血再灌注后各时间点神经细胞凋亡,FADD、Caspase-8及FLIP的mRNA和蛋白表达均明显增强(P<0.05～0.001)。结论大鼠脑缺血再灌注后神经细胞凋亡数增加,Fas-FADD-Caspase-8凋亡通路可能为其重要凋亡通路之一,抗凋亡因子FLIP mRNA和蛋白表达短暂升高,可能有拮抗脑缺血再灌注后神经细胞凋亡的作用。
