丙型肝炎病毒RNA阳性的肾移植受者免疫抑制剂的应用

目的 探讨肾移植术后发生丙型肝炎的受者合理的免疫抑制方案。方法 将２５例丙型肝炎病毒ＲＮＡ（ＨＣＶ ＲＮＡ）阳性的患者分为３组,分别给予硫唑嘌呤（Ａｚａ）＋环孢素Ａ（ＣｓＡ）＋泼尼松（Ｒｒｅｄ）（Ａｚａ组）、霉酚酸酯（ＭＭＦ）＋ＣｓＡ＋Ｐｒｅｄ（ＭＭＦ组）和ＭＭＦ＋Ｐｒｅｄ,并以３０例ＨＣＶ ＲＮＡ阴性受者为对照。结果Ａｚａ组和８／１２的患者肝功能发生异常;ＭＭＦ组有２／８的患者肝功能发生异常;Ｍ     

免疫抑制方案对肾移植并发慢性病毒性肝炎预后的影响

１９９１至１９９４年４月中山医科大学附一医院共完成１０１例肾移植。随访时间２８．６±９．６个月。术前供受者淋巴细胞毒性试验阴性。术中及术后２天，每日用甲基泼尼松龙（ＭＰ）０．２５～０．５ｇ，同时选用二联或三联免疫抑制方案。三联方案为泼尼松（Ｐｒｅｄ）、硫唑嘌呤（Ａｚａ）加环孢素Ａ（ＣｓＡ）；Ａｚａ于术前１天开始用１ｍｇ·ｋｇ－１·ｄ－１；Ｐｒｅｄ于术后第３天开始３０ｍｇ／ｄ，３个月后开始减量，一年后减为１０ｍｇ／ｄ；ＣｓＡ一般术后第３天开始５～８ｍｇ·ｋｇ－１·ｄ－１。二联方案为Ｐｒｅｄ加ＣｓＡ…     

肾移植患者术后早期应用霉酚酸酯的临床观察

目的 观察肾移植术后早期不同剂量霉酚酸酯（ＭＭＦ）与环孢素Ａ（ＣｓＡ）和泼尼松（Ｐｒｅｄ）联用预防急性排斥反应的效果及安全性。方法 将６４例肾移植患者分为３组,分别给予ＭＭＦ２．０ｇ／ｄ（Ａ组）、１．５ｇ／ｄ（Ｂ组）及Ａｚａ ５０～１００ｍｇ／ｄ（Ｃ组）,每组均联用ＣｓＡ及Ｐｒｅｄ（剂量相同）。观察肾移植术后６个月内急性排斥反应的发生率、移植肾功能及药物的副作用。结果 Ａ、Ｂ、Ｃ组急性排斥反应的发     

同种原位心脏移植的免疫抑制治疗

对２例同种原位以及移植受者采用环孢素Ａ（ＣｓＡ）、硫唑嘌呤（Ａｚａ）及皮质类固醇三联疗法进行免疫抑制治疗，治疗分为围手术期及长期维持两个阶段。围手术期的免疫抑制剂用量较大，１周后逐渐减量，ＣｓＡ１２个月后达维持量（２－３ｍｇ，ｋｇ＾－１／ｄ），Ａｚａ术后４０周达维持量（１．２－１．５ｍｇ．ｋｇ＾－１／ｄ），皮质粝固醇１年后停用。例１、例２分别发生３次，１急性排斥反应，经冲击治疗逆转。２例患者用药后     

肾移植后免疫抑制用药方案与移植肾长期存活的关系

目的 分析肾移植后不同的免疫抑制用药方案对移植肾长期存活的影响。方法 根据不同用药组合将患者分为环孢素Ａ（ＣｓＡ）、硫唑嘌呤（Ａｚａ）和泼尼松（Ｐｒｅｄ）三联治疗组、ＣｓＡ和Ｐｒｅｄ二联治疗组、Ａｚａ和Ｐｒｅｄ传统二联治疗组。统计分析免疫抑制用药、排斥反应发生及人、肾存活情况;对发生排斥反应的患者追踪其发生排斥前１２个月内的药物更动情况。结果 采用三联治疗的患者人／肾５年存活率（８８％／７８％）显     

骁悉与小剂量环孢素A在尸体肾移植中的联合应用

为观察骁悉（ＭＭＦ）与小剂量环孢素Ａ（ＣｓＡ）联合应用于尸体肾移植中的效果，将１６例患者随机分为３组，ＭＭＦ２．０ｇ组（ＭＭＦ用量为２．０ｇ／ｄ）；ＭＭＦ１．５ｇ组（ＭＭＦ用量为１．５ｇ／ｄ）；硫唑嘌呤（Ａｚａ）组。３组患者均同时接受相似剂量的ＣｓＡ和类固醇治疗。结果ＭＭＦ２．０ｇ组未发生急性排斥；ＭＭＦ１．５ｇ组１例（１／５）患者先后发生２次排斥；Ａｚａ组３例（３／５）患者各发生１次排斥。术后６个月ＭＭＦ２．０ｇ组患者血清肌酐值明显低于Ａｚａ组，其所用的ＣｓＡ剂量低于Ａｚａ组。认为ＭＭＦ无明显肝、肾毒性，每天２．０ｇ口服，并与小剂量ＣｓＡ和类固醇联合应用，临床疗效明显优于传统的三联疗法。     

肾移植术后肝功能异常患者用他克莫司替换环孢素A疗效的？…

目的 观察他克莫司（ＦＫ５０６）替换环孢素Ａ（ＣｓＡ）并联合应用霉酚酸酯（ＭＭＦ）及泼尼松（Ｐｒｅｄ）防治肾移植术后肝功能异常患者的有铲性一。方法 肾移植术后８例肝功能异常患者（男性５例，女性３例，平均３８．２３岁），用ＦＫ５０６替换ＣｓＡ治疗，停用ＣｓＡ２４ｈ后，开始给予ＦＫ５０６。ＦＫ５０６初始剂量根据患者体重、肝功能损害程度及术后时间确定，服药１周后，根据全血ＦＫ５０６谷值浓度调整剂量，使其     

用于肾移植的几种免疫抑制方案的对比研究

目的 比较肾移植后几种常用免疫抑制治疗方案的疗效与副作用。方法 根据所使用的免疫抑制治疗方案将８７例肾移植患者分为４组,Ａ组的免疫抑制治疗方案为他克莫司（ＦＫ５０６）、霉酚酸酯（ＭＭＦ）和泼尼松（Ｐｒｅｄ）;Ｂ线为环孢素Ａ（ＣｓＡ）、ＭＭＦ和Ｐｒｅｄ;Ｃ组为ＣｓＡ、硫唑嘌呤（Ａｚａ）和Ｐｒｅｄ;Ｄ组为ＣｓＡ和Ｐｒｅｄ。观察术后移植肾功能的恢复情况、排斥反应发生率、并发症及免疫抑制剂用量的变化。结果     

环孢素A肾毒性误诊为排斥反应一例

患者,男,４４岁。１９９１年８月行同种异体肾移植术。术后第３天肾功能正常,术后１周血肌酐为１１０μｍｏｌ／Ｌ。免疫抑制治疗采用环孢素Ａ（ＣｓＡ）１０ｍｇ·ｋｇ－１·ｄ－１、硫唑嘌呤（Ａｚａ）２ｍｇ·ｋｇ－１·ｄ－１及泼尼松（Ｐｒｅｄ）１ｍｇ·ｋｇ－１...     

肾移植术后恶性肿瘤五例报告

本院１９８９年１０月至１９９６年７月接受同种异体肾移植术患者１９８例，５例并发恶性肿瘤，其中男３例，女２例，年龄５０～６７岁，平均６１．２岁。移植肾功能良好。使用环孢素Ａ（ＣｓＡ）、硫唑嘌呤（Ａｚａ）和泼尼松（Ｐｒｅｄ）免疫抑制治疗。术后１个月免疫抑...     

他克莫司和霉酚酸酯在肾移植术后早期肝功能不良者的应用

目的 分析和评价肾移植术后早期肝功能不良患者使用他克莫司（FK506）和霉酚酸酯（MMF）的有效性和安全性。方法 20例肾移植患者术后早期发生肝功能不良，17例（85.0%）丙氨酸转氨酸（ALT）升高，9例（45.0%）胆红素升高。发生肝功能不良时，停用环孢素A（CsA）和硫唑嘌呤（Aza），采用FK506、MMF和泼尼松三联用药，常规使用保肝及利胆治疗。结果 20例肾移植术后肾功能全部恢复正常，未性急性排斥反应；治疗2周后，82.4%患者（14／17)ALT恢复正常，4周后全部患者的ALT恢复正常。结论 FK506和MMF用于肾移植术后早期肝功能不良患者是安全的，不加重肝功能损害。     

Impact of mycophenolate mofetil on recurrent rejection in kidney transplant patients

PURPOSE: Mycophenolate mofetil (MMF) has emerged as a valuable adjunctive agent in renal transplantation. However, due to intolerable adverse effects associated with MMF use in our transplant population, we have used MMF selectively in patients at high risk for recurrent graft rejection, since these patients are known to be at risk for poor long-term graft outcomes. The purpose of this study was to assess the efficacy of MMF in preventing the recurrence of acute rejection following an initial rejection episode in kidney transplant patients in the first year following transplantation. METHODS: Forty-four kidney transplant recipients were given MMF prospectively following treatment of their initial rejection episode to prevent recurrent rejection. MMF 1-2 g/d was given. Doses were adjusted based on tolerance; MMF therapy was to be continued for at least 6 months. The control group consisted of 124 consecutive kidney transplant recipients who had received standard anti-rejection therapy without the addition of MMF. Maintenance immunosuppression consisted predominantly of cyclosporine, prednisone+/-azathioprine. Anti-rejection therapy for both groups consisted of either corticosteroids (methylprednisolone 500 mg i.v. for 3 d or oral prednisone 2 mg/kg/d with rapid taper over 3 wk), OKT3 5 mg/d for 10 d or ATG 15 mg/kg/d for 10 d. All rejection episodes were confirmed by biopsy. RESULTS: The majority of rejection episodes were characterized histologically as mild or moderate. Most patients (76%) received corticosteroids for treatment of their first rejection episode. There was a 68% reduction in the incidence of recurrent rejection episodes within the first year of transplant in patients receiving MMF; only 14% of recipients receiving MMF developed recurrent rejection compared to 44% of patients in the control group (p<0.05). Approximately 50% of patients developed MMF-associated adverse effects (leukopenia, GI toxicity). Only 52% of patients remained on MMF at 6 months. One-yr graft survival was 86% in the MMF group and 89% in the control group (p>0.05). One-year patient survival was 93 and 100%, respectively (p>0.05). CONCLUSIONS: The addition of MMF to maintenance therapy for patients experiencing acute renal allograft rejection may prevent recurrent rejection episodes in the subsequent follow-up year.     

Conversion of liver transplant recipients on cyclosporine with renal impairment to mycophenolate mofetil.

The management of liver transplant recipients with renal function impairment remains controversial because cyclosporine withdrawal from triple immunosuppression regimens may be followed by graft rejection. A nonnephrotoxic and powerful immunosuppressant such as mycophenolate mofetil (MMF) could allow a reduction of cyclosporine dosage or its withdrawal and an improvement in renal function in these patients. Eleven patients with serum creatinine levels greater than 1.5 mg/dL, normal graft function, and a rejection-free period of at least 1 year started MMF at a dose of 2000 mg/d (reduced in case of adverse events) while cyclosporine dosage was slowly reduced. At last follow-up (63 +/- 5 weeks), 7 patients remained free of cyclosporine (6 of those patients are also free of steroids), 2 patients reduced their cyclosporine dose, and 2 patients developed mild acute rejection that responded to a switch to tacrolimus therapy. Serum creatinine and urea levels in the 7 patients free of cyclosporine decreased from 2.22 +/- 0.13 to 1.90 +/- 0.19 mg/dL (P =.05) and 0.95 +/- 0.10 to 0.60 +/- 0.10 g/L (P <.001), respectively. Creatinine clearance increased from 38.16 +/- 5.60 to 47.01 +/- 6. 76 mL/min (P =.005). Control of arterial hypertension also improved. Tolerance to MMF was good, but 6 patients required dose reductions, mainly because of asymptomatic anemia. In conclusion, in liver transplant recipients with stable graft function, MMF may allow cyclosporine dose reduction or discontinuation, thus improving renal function and the control of arterial hypertension. This change of treatment must be carefully monitored because of the frequent need for MMF dose reduction and the risk for rejection.     

Prevalence and association of post-renal transplant anemia

In some renal allograft recipients, anemia persists or develops following transplantation. Anemia is associated with pre-operative blood loss and allograft dysfunction, including delayed graft function, acute rejection and chronic allograft dysfunction. To study the prevalence and association of post-renal transplant anemia, we studied 200 renal transplant recipients; 131 (65.5%) patients were males and 69 (34.5%) patients were females, and age ranged from 17 to 67 years, with a mean of 37.7 ± 10.8 years. All patients were receiving cyclosporine, prednisolone and mycophenolate mofetil (MMF). Complete blood count was done at two times: three and six months post-renal transplant. There were 74% anemic patients three months after renal transplantation and 45% anemic patients six months after renal transplantation. High creatinine value, female gender, delayed graft function, episodes of acute rejection, perioperative blood loss and infections were the only significant independent risk factors for prevalence of anemia post-renal transplant. In our study, we did not find an association between MMF and cyclosporine nor angiotensin-converting enzyme inhibitors (ACEIs) or angiotensin receptors blocker (ARBs) with anemia. This study demonstrates that anemia is a common complication during the first six months after kidney transplantation, with several risk factors precipitating this complication.     

Withdrawal of mycophenolate mofetil in stable renal transplant recipients

BACKGROUND: Mycophenolate mofetil (MMF) has been demonstrated to decrease episodes of acute rejection in renal transplant recipients during the first year after transplantation. The utility of MMF after 1 year is less clear. METHODS: Forty-five stable renal transplant recipients on maintenance therapy of cyclosporine microemulsion, MMF, and prednisone had MMF withdrawn at approximately 1 year after transplantation. A matching concurrent group of 45 stable renal transplant recipients served as the case control group. RESULTS: Two of 45 patients in the MMF withdrawal group suffered an acute rejection episode as opposed to 1 of 45 in the control group. Both patients who rejected in the withdrawal group had adequate cyclosporine levels and had no recent decrease in prednisone dose. There was no evidence of an increased incidence of proteinuria or increased creatinine levels in the MMF withdrawal group. CONCLUSION: In general, withdrawal of MMF in stable renal transplant recipients is well tolerated. No increased risk of rejection could be demonstrated in this patient group. A larger study will be needed to confirm our result.     

Conversion from calcineurin inhibitors to mycophenolate mofetil in liver transplant recipients with diabetes mellitus

Diabetes mellitus, a frequent metabolic complication in liver transplant recipients, may be produced by the diabetogenic effect of calcineurin inhibitors cyclosporine and tacrolimus. The aim of this study was to investigate the safety and metabolic effects of a gradual switch from cyclosporine or tacrolimus to mycophenolate mofetil among 12 diabetic liver transplant recipients. One patient was withdrawn from the study due to gastrointestinal side effects. Of the 11 remaining patients, cyclosporine or tacrolimus was completely withdrawn in five patients. Two patients developed suspected acute rejection episodes that were controlled by increasing the tacrolimus dosage. Glycosylated hemoglobin A1C and C-peptide levels were significantly lower at 3 and 6 months after the initiation of mycophenolate mofetil (P<.03 in all cases). Furthermore, urea and uric acid levels were significantly reduced after the change of treatment. In conclusion, a switch from cyclosporine/tacrolimus to mycophenolate mofetil may produce beneficial metabolic effects in diabetic liver transplant recipients, but poses a risk of graft rejection.     

他克莫司和环孢素A对肾移植术后患者肝功能影响的临床比较观察

目的:研究和比较他克莫司（FK506）以及环孢素A（CsA)对肾移植术后患者肝功能的影响。方法：将肾移植术后患者随机分为FK506组和CsA组,FK506组8例,CsA组26例。CsA组中出现肝功能异常的6例患者用FK506进行替换治疗。两组均联合应用霉酚酸酯（MMF）和泼尼松（Pred)。结果：观察6个月,FK506组和CsA组中急性排斥的发生率差异 不显著;FK506组中未发现肝功能异常患者,CsA组中有6例患者肝功能异常;肝功能异常的6例患者用FK506替换CsA后,总胆红素（TBIL）、直接胆红素（DBIL）、丙氨酸转氨酶（ALT）相继转为正常。结论：FK506免疫抑制剂效果与CsA相似,但对肝功能影响甚微,适合应用于术前有肝功损害或术后应用CsA后出现肝功能异常倾向的患者。     

Prospective, Pilot, Open-Label, Short-Term Study of Conversion to Leflunomide Reverses Chronic Renal Allograft Dysfunction

Leflunomide (LEF) is a synthetic isoxazole derivative with anti-inflammatory and antiviral properties, which has been reported to prevent acute rejection and delay progression of chronic allograft nephropathy (CAN) in animal models. We performed a pilot, crossover trial in 22 renal transplant recipients who were converted from azathioprine (AZA) or mycophenolate mofetil (MMF) to LEF in an effort to slow progression of renal dysfunction [deteriorating renal function (n = 5), cyclosporine (CyA) nephrotoxicity (n = 4) or biopsy-proven CAN (n = 13)]. Baseline maintenance immunosuppression consisted of CyA, AZA or MMF and prednisone. Six-month postconversion patient and graft survival was 100% and 91%, respectively. Mean serum creatinine 6months preconversion was 2.2 +/- 0.6mg/dL, at initiation was 3.0 +/- 1.1 mg/dL, and 6 months postconversion was 2.8 +/- 1.3 mg/dL. The rate of change in serum creatinine was 35 +/- 39%/6 months preconversion and -5 +/- 21%/6 months postconversion to LEF (p = 0.003). Two patients discontinued LEF for diarrhea and myalgia. No readmissions, increase in liver function tests, infections or acute rejection episodes occurred. Mean CyA levels did not change, 146 +/- 72 ng/ mL pre-LEF vs. 132 +/- 51 ng/mL post-LEF, p = NS. Conversion to LEF reversed progression of chronic renal allograft dysfunction with minimal toxicity.     

Results of a randomized, prospective, multicenter trial of mycophenolate mofetil versus azathioprine in the prevention of acute lung allograft rejection.

BACKGROUND: Although the use of mycophenolate mofetil (MMF) has reduced the incidence of acute rejection in heart and kidney allograft recipients, its role in lung transplantation remains controversial. Therefore, we conducted a randomized, prospective, open-label, multicenter study in lung transplant recipients to determine whether MMF decreases episodes of acute allograft rejection when compared with azathioprine (AZA). METHODS: Between March of 1997 and January of 1999, 81 consecutive lung transplant recipients from two centers were prospectively randomized to receive cyclosporine, corticosteroids, and either 2 mg/kg per day of AZA or 1 g twice daily of MMF. The primary study endpoint was biopsy-proven acute allograft rejection over the first 6 months posttransplant. Secondary endpoints included clinical rejection, cytomegalovirus (CMV) infection, adverse events, and survival. Surveillance bronchoscopies were performed at 1, 3, and 6 months, or if clinically indicated. Pathologists interpreting the biopsy results were blinded to the randomization. Results were analyzed according to intention-to-treat. Between group comparisons of means and proportions were made by using two sample t tests and Fisher's exact tests, respectively. Six-month survival was calculated by the Kaplan-Meier method and compared by the log rank test. RESULTS: Thirty-eight patients were prospectively randomized to receive AZA, and 43 MMF. The incidence of biopsy proven grade II or greater acute allograft rejection at 6 months was 58% in the AZA group and 63% in the MMF group (P=0.82). The 6-month survival rates in the MMF and AZA groups were 86% and 82%, respectively (P=0.57). Rates of CMV infection and adverse events were not significantly different between the two groups. CONCLUSIONS: Acute rejection rates and overall survival at 6 months are similar in lung transplant recipients treated with either MMF- or AZA-based immunosuppression.     

在移植肾功能稳定的受者中主动撤除环孢素A的临床研究

目的 研究在移植肾功能稳定的受者中主动撤除环孢素A(CSA)对急性排斥反应发生率及肾功能的影响.方法 选择35例肾功能稳定的肾移植受者,其中尸体肾移植23例,亲属活体肾移植12例.除2例为再次肾移植外,其余均为初次肾移植.分别在肾移植术后6个月～6年时停用CsA,平均为术后(13.3±9.1)个月.撤除CsA后免疫抑制方案为:霉酚酸酯(MMF)+西罗莫司(SRL)+泼尼松(Pred).撤除CsA前有9例做了移植肾穿刺活检,8例测定了抗HLA抗体.结果 对35例受者随访6个月～4.5年,平均14.8个月.撤除CsA前、后血肌酐平均值分别为(88.1±15.5)μmol/L和(92.3±23.7)/μmol/L(P0.05).撤除CsA后,有2例经活检证实发生急性排斥反应,治疗后均逆转;CsA所致的毒副作用,如牙龈增生、糖耐量异常和多毛症等明显改善.9例移植肾活检中,有3例肾功能正常的受者已出现轻度慢性移植肾肾病表现.抗HLA抗体检测中,7例阴性者在撤除CsA前、后肾功能无明显变化.1例抗HLA抗体呈强阳性者在撤除CsA后进展为慢性移植肾肾病,恢复血液透析.结论 对移植肾功能稳定的受者在移植6个月后撤除CsA,转换为"霉酚酸酯+西罗莫司+泼尼松"的免疫抑制方案是安全的,不增加急性排斥反应风险;撤除CsA有利于消除一些与其相关的毒副作用;对抗HLA抗体呈强阳性者.撤除CsA后很难改变肾功能的进展.