Interferon(IFN) with antiviral and im-munomodulatory activities is one of the most important therapeutic agents for the treatment of chronic hepatitis. The apoptotic effect of IFN is influenced by cell type and the ty...Interferon(IFN) with antiviral and im-munomodulatory activities is one of the most important therapeutic agents for the treatment of chronic hepatitis. The apoptotic effect of IFN is influenced by cell type and the types of IFN, which suppresses proliferation and induces apoptosis in some cell types while inhibiting apoptosis in others. The aim of this study was to explore the effect of IFNα-2a on Fas expression and the apoptosis rate of peripheral blood cytotoxic T cells (CTLs) in patients with hepatitis B. METHODS:Peripheral blood mononuclear cells were isolated from 26 patients with hepatitis B including 16 patients with chronic hepatitis B and 10 patients with chronic severe hepatitis B. Fas expression and apoptosis rate of CTLs were analyzed with flow cytometry before and after IFNα-2a treatment. RESULTS:Before IFNα-2a treatment, Fas expression and apoptosis rate of CTLs from patients with chronic hepatitis B were significantly higher than those from patients with chronic severe hepatitis B and healthy controls respectively. No significant difference was observed between Fas expression and apoptosis rate of CTLs from patients with chronic severe hepatitis B and healthy controls. After IFNα-2a treatment,Fas expression and apoptosis rate of CTLs from different groups were compared with those before IFNα-2a treatment, showing no significant difference despite alternation of different degree. CONCLUSIONS:Activation induced cell death (AICD) exists in peripheral blood CTLs from patients with hepatitis B. No effect of IFNα-2a exerts on Fas expression and apoptosis rate of Fas in patients with hepatitis B.展开更多
To study the effect of Trastuzumab in combination with IFN α-2b on HER2 and MRP1 of ACHN in vitro, ACHN cell line of RCC was cultured by employing cell culture. The tetrazolium-based colorimetric assay was used to ev...To study the effect of Trastuzumab in combination with IFN α-2b on HER2 and MRP1 of ACHN in vitro, ACHN cell line of RCC was cultured by employing cell culture. The tetrazolium-based colorimetric assay was used to evaluate the growth-inhibiting effect of Trastuzumab with IFN α-2b. SP method was utilized to determine the expression of HER2 and MRP1 of the cells. Our results showed that Trastuzumab had inhibitory effect on the growth of renal tumor cells and reversing effect on the multi-drug-resistance (MDR) in RCC in a time- and dose-dependent manner. Treated with Trastuzumab with or without IFN α-2b, the expression of HER2 and MRP1 genes of RCC was decreased significantly (P<0.05). It was concluded that Trastuzumab with IFN α-2b could inhibit the proliferation of RCC and the expression of HER2 and MRP1 of ACHN and to some extent, reverse the MDR of the tumor cells.展开更多
文摘目的探讨应用聚乙二醇化干扰素α(Peg-ⅠFNα)联合利巴韦林(RBV)治疗基因1/6型慢性丙型肝炎(CHC)患者的临床疗效。方法随机将246例慢性丙型肝炎(CHC)患者分为观察组123例和对照组123例,分别接受Peg-ⅠFNα-2b 80μg或Peg-ⅠFNα-2a 180μg皮下注射,1次/w,两组均同时口服利巴韦林,治疗48 w,随访24 w。采用罗氏公司COBAS Taqman HCV实时定量PCR试剂检测血清HCV RNA,采用Abbott Real Time HCV Genotype Ⅱ试剂检测HCV基因型。结果观察组和对照组基线基因1型感染者分别为104例(84.6%)和108例(87.8%),基因6型感染者分别为19例(15.4%)和15例(12.2%,P>0.05),血清HCV RNA水平分别为(7.17±0.89) lg copies/ml和(7.19±0.88) lg copies/ml,白细胞计数分别为(6.6±1.3)×10~9/L和(6.6±1.5)×10~9/L,血小板计数分别为(154.1±21.1)×10~9/L和(157.2±19.2)×10~9/L,血清ALT水平分别为(83.4±26.3) U/L和(80.3±29.4)U/L,均无显著性相差(P>0.05);观察组快速病毒学应答率(RVR)、早期病毒学应答率(EVR)、治疗结束时病毒学应答率(ETVR)和持续病毒学应答率(SVR)分别为45.5%、82.1%、83.7%和85.4%,与对照组的43.1%、78.9%、79.7%和78.0%比,无显著性差异(P>0.05),两组停药后复发率分别为14.6%和22.0%,也无显著性相差(P>0.05);在治疗过程中,观察组与对照组发热(58.5%对61.0%)、肌肉酸痛(48.8%对51.2%)、乏力(41.5%对44.7%)、头痛(30.9%对34.1%)、厌食(25.2%对30.1%)、脱发(26.8%对30.9%)、失眠(20.3%对25.2%)、白细胞下降(27.6%对31.7%)、红细胞下降(23.6%对28.5%)、血小板下降(13.8%对17.9%)和血清T3/T4/TSH异常(8.9%对10.6%)等不良反应发生率比较,均无显著性差异(P>0.05)。结论应用Peg-ⅠFNα-2b或Peg-ⅠFNα-2a治疗基因1/6型CHC患者,疗效较好,且两种干扰素治疗效果相当,安全性较好,值得临床应用。
文摘Interferon(IFN) with antiviral and im-munomodulatory activities is one of the most important therapeutic agents for the treatment of chronic hepatitis. The apoptotic effect of IFN is influenced by cell type and the types of IFN, which suppresses proliferation and induces apoptosis in some cell types while inhibiting apoptosis in others. The aim of this study was to explore the effect of IFNα-2a on Fas expression and the apoptosis rate of peripheral blood cytotoxic T cells (CTLs) in patients with hepatitis B. METHODS:Peripheral blood mononuclear cells were isolated from 26 patients with hepatitis B including 16 patients with chronic hepatitis B and 10 patients with chronic severe hepatitis B. Fas expression and apoptosis rate of CTLs were analyzed with flow cytometry before and after IFNα-2a treatment. RESULTS:Before IFNα-2a treatment, Fas expression and apoptosis rate of CTLs from patients with chronic hepatitis B were significantly higher than those from patients with chronic severe hepatitis B and healthy controls respectively. No significant difference was observed between Fas expression and apoptosis rate of CTLs from patients with chronic severe hepatitis B and healthy controls. After IFNα-2a treatment,Fas expression and apoptosis rate of CTLs from different groups were compared with those before IFNα-2a treatment, showing no significant difference despite alternation of different degree. CONCLUSIONS:Activation induced cell death (AICD) exists in peripheral blood CTLs from patients with hepatitis B. No effect of IFNα-2a exerts on Fas expression and apoptosis rate of Fas in patients with hepatitis B.
文摘To study the effect of Trastuzumab in combination with IFN α-2b on HER2 and MRP1 of ACHN in vitro, ACHN cell line of RCC was cultured by employing cell culture. The tetrazolium-based colorimetric assay was used to evaluate the growth-inhibiting effect of Trastuzumab with IFN α-2b. SP method was utilized to determine the expression of HER2 and MRP1 of the cells. Our results showed that Trastuzumab had inhibitory effect on the growth of renal tumor cells and reversing effect on the multi-drug-resistance (MDR) in RCC in a time- and dose-dependent manner. Treated with Trastuzumab with or without IFN α-2b, the expression of HER2 and MRP1 genes of RCC was decreased significantly (P<0.05). It was concluded that Trastuzumab with IFN α-2b could inhibit the proliferation of RCC and the expression of HER2 and MRP1 of ACHN and to some extent, reverse the MDR of the tumor cells.
