环孢菌素 A(Cyclosporin A CsA)是早已应用于临床器官移植抗排斥反应以及治疗某些自身免疫病的高效免疫抑制剂。FK-506则是近年发现的另一种效力更强的免疫抑制剂。FK-506与CsA的结构尽管完全不同,然而两者的生物活性却极其相似:两者均...环孢菌素 A(Cyclosporin A CsA)是早已应用于临床器官移植抗排斥反应以及治疗某些自身免疫病的高效免疫抑制剂。FK-506则是近年发现的另一种效力更强的免疫抑制剂。FK-506与CsA的结构尽管完全不同,然而两者的生物活性却极其相似:两者均特异性抑制T淋巴细胞的活化,而这种作用又都是通过抑制某些早期基因(如编码细胞因子的基因)的转录而实现的。这启发人们将它们作为一种有效的“分子探针”以探索一度曾被认为是“黑匣子”的细胞内信息传导途径。展开更多
AIM: To investigate the effect of cyclosporine A (CsA), FK-506, and mycophenolate mofetil (MMF) and 40-0-[2- hydroxyethyl]rapamycin (RAD) on proliferation of human intrahepatic biliary epithelial cells (BECs)...AIM: To investigate the effect of cyclosporine A (CsA), FK-506, and mycophenolate mofetil (MMF) and 40-0-[2- hydroxyethyl]rapamycin (RAD) on proliferation of human intrahepatic biliary epithelial cells (BECs) in vitro.METHODS: BECs were isolated from six human liver tissuespecimens with the immunomagnetic separation method and treated with different concentrations of CsA, FK-S06, RAD, and MMF in vitro. Proliferation of the cells was measured by MTT assay at 24 and 48 h after treatment, respectively. One-way analysis of variance was used to analyze the results. Expression of CK 19 in BECs was monitored by flow cytometry and Western blot.RESULTS: Six lines of BECs were established. They survived for 4-18 wk in vitro. Flow cytometry analysis showed that these cells always expressed CK19. CsA, FK-506, RAD, and MMF inhibited proliferation of BECs in a dose-dependent manner. The lowest concentration of CsA, FK-506, RAD, and MMF to inhibit proliferation of BECs (P〈0.05) was 500, 100, 0.25, and 100 pg/L, respectively. However, the expression of CK19 by BECs was not changed.CONCLUSION: CsA, FK-506, RAD, and MMF have an antiproliferative effect on human intrahepatic BECs in vitro, while RAD has the strongest growth-inhibitory effect. Their possible effects on liver regeneration and bile duct injury in transplant patients should be further investigated.展开更多
Purpose: To evaluate the clinical efficacy of FK-506 on suppressing high-risk cornea transplantation rejection.Methods: In a randomized controlled clinical trial, 56 eyes of 56 patients with high-risk keratoplasty (in...Purpose: To evaluate the clinical efficacy of FK-506 on suppressing high-risk cornea transplantation rejection.Methods: In a randomized controlled clinical trial, 56 eyes of 56 patients with high-risk keratoplasty (including total corneal transplantation TCT, total corneal transplantation with circular lamellar sclera CST, vascularization corneal transplantation and corneal retransplantation) were divided into the experimental group and the control group(each with 28 eyes).The experimental group was treated by FK-506 eyedrops (0.5 mg/ml) and TobraDex eyedrops, compared with the control group that was treated by 1% CsA eyedrops and TobraDex eyedrops. In the average 8.1-month follow-up period, the visual acuity, graft transparent duration and Rejection Index (RI) of grafts were observed. Results: In the follow-up period, the graft rejection rate of the experimental and the control group was 63.6% and 95.2% respectively (χ2=4. 72, P < 0. 05) with significant difference.Conclusions: The local application of FK-506 suppressed effectively the graft rejection of corneal transplantation of the patients at high risk.展开更多
文摘环孢菌素 A(Cyclosporin A CsA)是早已应用于临床器官移植抗排斥反应以及治疗某些自身免疫病的高效免疫抑制剂。FK-506则是近年发现的另一种效力更强的免疫抑制剂。FK-506与CsA的结构尽管完全不同,然而两者的生物活性却极其相似:两者均特异性抑制T淋巴细胞的活化,而这种作用又都是通过抑制某些早期基因(如编码细胞因子的基因)的转录而实现的。这启发人们将它们作为一种有效的“分子探针”以探索一度曾被认为是“黑匣子”的细胞内信息传导途径。
文摘AIM: To investigate the effect of cyclosporine A (CsA), FK-506, and mycophenolate mofetil (MMF) and 40-0-[2- hydroxyethyl]rapamycin (RAD) on proliferation of human intrahepatic biliary epithelial cells (BECs) in vitro.METHODS: BECs were isolated from six human liver tissuespecimens with the immunomagnetic separation method and treated with different concentrations of CsA, FK-S06, RAD, and MMF in vitro. Proliferation of the cells was measured by MTT assay at 24 and 48 h after treatment, respectively. One-way analysis of variance was used to analyze the results. Expression of CK 19 in BECs was monitored by flow cytometry and Western blot.RESULTS: Six lines of BECs were established. They survived for 4-18 wk in vitro. Flow cytometry analysis showed that these cells always expressed CK19. CsA, FK-506, RAD, and MMF inhibited proliferation of BECs in a dose-dependent manner. The lowest concentration of CsA, FK-506, RAD, and MMF to inhibit proliferation of BECs (P〈0.05) was 500, 100, 0.25, and 100 pg/L, respectively. However, the expression of CK19 by BECs was not changed.CONCLUSION: CsA, FK-506, RAD, and MMF have an antiproliferative effect on human intrahepatic BECs in vitro, while RAD has the strongest growth-inhibitory effect. Their possible effects on liver regeneration and bile duct injury in transplant patients should be further investigated.
文摘Purpose: To evaluate the clinical efficacy of FK-506 on suppressing high-risk cornea transplantation rejection.Methods: In a randomized controlled clinical trial, 56 eyes of 56 patients with high-risk keratoplasty (including total corneal transplantation TCT, total corneal transplantation with circular lamellar sclera CST, vascularization corneal transplantation and corneal retransplantation) were divided into the experimental group and the control group(each with 28 eyes).The experimental group was treated by FK-506 eyedrops (0.5 mg/ml) and TobraDex eyedrops, compared with the control group that was treated by 1% CsA eyedrops and TobraDex eyedrops. In the average 8.1-month follow-up period, the visual acuity, graft transparent duration and Rejection Index (RI) of grafts were observed. Results: In the follow-up period, the graft rejection rate of the experimental and the control group was 63.6% and 95.2% respectively (χ2=4. 72, P < 0. 05) with significant difference.Conclusions: The local application of FK-506 suppressed effectively the graft rejection of corneal transplantation of the patients at high risk.
文摘目的 研制可植入玻璃体的FK506控释药膜,并评价其在兔玻璃体腔内的释药动力学过程及毒副作用。方法 HPLC/MS/MS法测定FK506控释药膜植入玻璃体后3个月内眼内组织及全血中的FK506浓度,观察该药膜植入兔眼后1个月内的毒性反应。结果FK506控释药膜植入兔玻璃体3个月内,玻璃体的平均药物质量浓度为41.57ng/ml,而全血中仅为0.25ng/ml。裂隙灯显微镜、ERG及组织学检查均显示FK 506控释药膜植入兔眼后1个月内未发生局部毒性反应。结论 可植入性FK506控释药膜植入兔玻璃体后,以较恒定的速率释放FK 506,使眼内组织在较长时间内维持较稳定的 FK 506浓度。兔眼对 FK 506控释药膜表现出良好的耐受性。