人白细胞抗原交叉反应组配型在肾移植中的应用

目的：探讨人白细胞抗原（HLA）交叉反应组（CREGs)配型原则在临床肾移植中的应用及意义。方法：312例肾移植患者分为两组，一组按传统配型原则错配2个以上位点并采用CREGs配型原则选择供受者，149例；另一组为同期按传统配型原则错配0－2个位点者，163例。比较两者移植肾1年存活率及术后1个月内急性排斥发生率。结果：按CREGs配型原则，供受者HLA－I类抗原0、1、2错配百分比分别为16．7％、41．6％和34．2％，传统配型者分别为6．7％、21．5％和71．8％。CREGs 0、1错配组相配率显著高于传统配型对应组（P＜0．01）。术后1个月急性排斥反应发生率各对应组间相比差异无显著性意义（P＞0．05），但CREGs 0错配组明显低于A、B2错配组（P＜0．05）。移植肾1年存活率各对应组间差异无显著性意义（P＞0．05），但CREGs 0错配组明显高于A、B2错配组（P＜0．05）。结论：采用CREGs配型原则选择供受者，可以获得满意的移植肾1年存活率，并不增加术后排斥反应发生率，为等待供肾的患者提供了更多机遇。     

尿流式细胞学在诊断移植肾急性排斥反应中的应用价值

目的：探讨尿流式细胞学在诊断移植肾急性排斥反应中的临床应用价值。方法：对43例肾移植受者的116份尿样本进行尿流式细胞学分析，并将急性排斥组和肾功能稳定组的分析结果进行比较。结果：急性排斥反应组尿淋巴细胞总数以及HLA－DR^ 淋巴细胞数显著增多，与肾功能稳定组比较，P＜0．01，CD8^ 细胞亦增多（P＜0．05），而CD3^ ,CD4^ ,CD19^ 细胞数变化两组差异不显著（P＞0．05），在诊断移植肾急性排斥反应上，HLA－DR阳性样本和淋巴细胞数阳性样本的诊断敏感性和特异性分别达95．2％，90．5％，和92．6％，87．4％，结论：尿流式细胞学分析可反映移植肾内的免疫状态，尿淋巴细胞数的显著增多和尿HLA－DR^ 淋巴细胞增多可以作为诊断急性排斥反应的有意义指标。     

新疆地区331例肾移植分析

目的 总结和分析新疆地区肾移植的经验。方法 331例肾移植受者（汉族235例，少数民族96例）均接受汉族尸体供肾，对受者移植前、后影响移植肾存活率的各种因素进行单因素和多因素分析。结果 汉族和少数民族患者术前一般情况相比，差异无统计学意义；汉族患者1年和3年的移植肾存活率均略高于少数民族患者，1年移植肾存活率分别为90．28％和83．33％，3年存活率分别为76．79％和68．92％，但其差异无统计学意义（P〉0．05）；在单因素分析中患者的急性排斥反应和免疫抑制方案与移植肾的存活率密切相关（P〈0．05）。在多因素回归分析中，仅有急性排斥反应与移植肾的存活率密切相关（P〈0．05）。结论 新疆地区少数民族与汉族尿毒症患者肾移植的短期及中期疗效相近，远期疗效尚有待进一步观察；急性排斥反应是影响移植肾存活的重要因素；免疫抑制方案在一定程度上可影响移植肾的存活。     

受者细胞因子基因多态性预测肾移植术后效果的意义

目的 探讨受者细胞因子基因多态性预测移植肾急性排斥反应的意义。方法 采用序列特异引物聚合酶链反应（PCR－SSCP）方法，检测144例肾移植受者细胞因子基因型。结果 TNF－α或IL－10高分泌基因型组急性排斥反应发生率高于中低分泌组，差异有极显著性意义（P＜0．001）。TNF－α、IL－10高分泌基因型组急性排斥反应发生率比其它基因型组合组高，差异有显著性意义（P＜0．05）。结论 受者TNF－α和IL－10基因型是移植肾急性排斥反应的决定性因素之一。     

肾移植早期尿淋巴细胞表型分析的应用价值

目的：探讨尿淋巴细胞表型分析在肾移植早期免疫监测中的临床应用价值。方法：以流式细胞技术对37例肾脏移植患者的105份尿样本进行尿淋巴细胞表型分析,测定CD3、CD4、CD8、CD19、CD25、HLA－DR阳性细胞百分率,其结果在急性排斥反应组和肾功能稳定组之间进行比较。结果：与肾功能稳定组比较,急性排斥反应组尿淋巴细胞表达HLA－DR数增多非常显著（P＜0．01）,CD8和CD25细胞增多显著（P＜0．05）,而CD3、CD4、CD19细胞数变化不显著（P＞0．05）。在诊断移植肾急性排斥反应上,HLA－DR阳性样本的诊断敏感性和特异性分别达86．96％和90．24％,CD8和CD25阳性标本的阴性预测值分别达86．79％和85．71％。结论：尿淋巴细胞表型分析可间接反映出移植肾内的免疫状态,是诊断和鉴别诊断移植肾急性排斥反应的有效方法,适用于肾移植早期的免疫监测。     

一剂赛尼哌对肾移植急性排斥反应的预防作用

目的 探讨1剂赛尼哌在预防同种异体肾移植急性排斥反应中的作用。方法 回顾性分析50例应用1剂赛尼哌的肾移植患者资料，同期30例未应用赛尼哌患者作为对照，随访6个月。分析比较2组患者急性排斥反应、移植肾功能、感染及赛尼哌不良反应发生情况。结果 赛尼哌组发生急性排斥反应13例（26％），对照组为17例（57％），差异有统计学意义（P〈0．05），2组患者药物不良作用方面、血液系统损害、肝功能损害、感染发生率及人／肾存活率差异无统计学意义（P〉0．05）。结论 联合应用1剂赛尼哌免疫抑制方案可以降低肾移植急性排斥反应发生率，改善移植肾功能，不良反应轻。     

彩色多普勒超声在肾移植后排斥反应诊断中的应用

目的 探讨彩色多普勒超声在移植肾排斥反应监测中的应用价值。方法 对68例肾移植患者采用彩色多普勒超声进行监测，观察移植肾的结构及体积、肾皮质厚度、肾动脉内径、血流灌注情况、血流动力学参数。结果术后随访最长者达4年，45例移植肾功能正常，未发生排斥反应者，其移植肾在彩色多普勒超声下表现为边界清晰，肾内结构清楚，皮、髓质界限分明，血流丰富。13例发生急性排斥反应者，彩色多普勒超声下可见移植肾明显肿大，肾实质血流信号稀少，叶间动脉呈断续闪烁状，弓形动脉几乎无血流信号。10例发生慢性排斥反应者，彩色多普勒超声下可见移植肾体积缩小，皮质变薄，肾皮质与肾髓质界限不清，肾内血管分枝稀疏，血管树不连续，弓形动脉及小叶间动脉往往不显示，为低速高阻血流。血流动力学参数显示，发生急性排斥反应者的肾动脉阻力指数及搏动指数明显增高，舒张期峰值流速减低；发生慢性排斥反应者的肾动脉内径明显缩小，收缩期峰值流速及舒张期峰值流速明显减低，血流灌注量明显减少，阻力指数及搏动指数明显升高，与肾功能正常者比较，差异均有统计学意义。结论对于肾移植患者的术后监测，彩色多普勒超声具有独特的优点，无创、便捷，其所测得的移植肾形态学数据和血流动力学参数对排斥反应的判断具有重要参考价值，可作为肾移植术后的常规峪测手段。     

彩色多普勒血流显像及多普勒能量图在移植肾排斥反应中的应用

目的探讨彩色多普勒血流显像及多普勒能量图在检测移植肾排斥反应中的应用价值。方法对46例肾移植受者术后进行了彩色多普勒血流显像及多普勒能量图检查。根据检测结果将46例肾移植术后受者分为3组,移植肾正常组(30例)、急性排斥组(9例)和慢性排斥组(7例),并与超声引导下肾组织穿刺的病理检查结果进行比较。结果16例急、慢性排斥反应的患者移植肾动脉搏动指数及阻力指数均高于移植肾正常组;急性排斥组肾脏长径及肾皮质厚度明显大于移植肾正常组;慢性排斥反应时肾皮质厚度、肾脏长径、宽径均小于移植肾正常组。结论彩色多普勒血流显像及多普勒能量图对移植肾血流灌注及排斥反应判断有独特的优点,搏动指数、阻力指数以及肾皮质厚度可作为有无移植肾排斥的指标之一。     

彩色多普勒超声联合核素动态显像在肾移植术后的应用

目的：探讨彩色多普勒超声、核素动态显像在肾移植术后早期并发症诊断与鉴别诊断中的应用价值。方法：收集肾移植术后肾功能恢复不佳且行彩色多普勒超声和核素肾动态显像检查的患者59例,分为3组：急性排斥反应组18例,加速性排斥反应组12例、急性肾小管坏死组29例,同时收集术后肾功能恢复良好的正常组20例,分别统计上述4组彩色多普勒的阻力指数（RI）、移植肾体积、血流分布,分析彩色多普勒在鉴别诊断中的价值。计算核素肾动态显像的指标：灌注相内1min时腹主动脉放射性计数与移植肾放射性计数比值（K1min/A1min）,功能相20min时膀胱/移植肾放射性计数比值（B/K）,分析其诊断价值。结果：彩色多普勒检查指标中,当移植肾体积增大、血流减少、阻力指数升高均提示移植肾病变,以阻力指数较敏感,但特异性不高。根据核素肾动态显像指标的计算数据,K1min/A1min比值联合B/K比值在诊断排斥反应与肾小管坏死方面准确性较高,分别达到96.7%和89.7%;K1min/A1min〈4和B/K〈1提示排斥反应,K1min/A1min≥4和B/K〈1提示肾小管坏死。结论：彩色多普勒联合核素动态显像对于肾移植术后排异、急性肾小管坏死、移植肾功能延迟恢复的诊断与鉴别诊断具有很好的临床价值,二者联合应用,互补长短。     

亲属活体供肾移植与尸体供肾移植的临床疗效比较

目的比较HLA配型和免疫抑制方案相同情况下亲属活体供肾移植与尸体供。肾移植的临床效果。方法对12例亲属活体供肾移植供、受者的临床资料进行回顾性分析，并与22例同期进行的、HLA配型情况相近的尸体供肾移植的临床资料进行对比，分析各组术后人／肾1年及3年存活率、1年内急性排斥反应发生率及3年内的。肾功能。结果12例供者均无手术并发症，术后肾功能正常，生活及工作未受明显影响。术后1年内的急性排斥反应发生率，亲属活体供。肾组和尸体供。肾组分别为16．7％和22．7％（P〈0．05）；人／肾1年和3年存活率，亲属活体供肾组分别为100％（12／12）／91．7％（11／12）和91．7％（11／12）／83．3％（10／12），尸体供。肾组分别为100％（22／22）／90．9％（20／22）和95．4％（21／22）／86．4％（19／22），两组比较，差异无统计学意义（P〉0．05）；3年内的。肾功能，亲属活体供肾移植组明显优于尸体供肾移植组（P〈0．05）。结论在HLA配型和免疫抑制方案相同的情况下，亲属活体供。肾移植的临床效果优于尸体供。肾移植。     

Outcomes of Delayed Graft Function in Kidney Transplant Recipients Stratified by Histologic Biopsy Findings

Delayed graft function (DGF) after kidney transplantation is associated with an increased risk of graft failure. We studied the histologic findings among adult kidney transplant recipients transplanted between January 2000 and June 2015 who had DGF and had a kidney biopsy within 14 days of transplant. Death censored graft failure (DCGF) and death at 1 and 3 years after transplant were examined. A total of 269 transplant recipients fulfilled our selection criteria, of which 152 (56.51%) had acute tubular necrosis (ATN), 44 (16.4%) had acute rejection (AR), mainly T-cell mediated rejection (n = 31), 35 (13%) had ATN with AR (mainly T-cell mediated rejection, n = 26), and 38 (14.1%) had other pathology. Compared with those with ATN alone, kidney transplant recipients with AR alone had a significantly higher risk of DCGF at 1 year post transplant (adjusted hazard ratio = 3.70; 95% confidence interval 1.5-9.5; P = .006). Those with AR alone had an increased risk of DCGF at 3 years post transplant (hazard ratio = 3.10; 95% confidence interval 1.3-8.5; P = .01) in crude analyses. There was no association between DGF etiology and mortality. Early renal biopsy can be used to distinguish AR, which has protocolized treatments, from other etiologies. This could potentially alter allograft survival within 1 year of transplant complicated by DGF.     

Monitoring of renal allografts by duplex ultrasound

Abstract. Deterioration of renal transplant function due to rejection is accompanied by changes in renal blood flow that can be measured by duplex ultrasound (DU). In the present study, 60 transplanted patients were followed up. A total of 233 duplex examinations, 68 percutaneous biopsies, 44 renal scintigraphies, and 6 transplant nephrectomies were performed on these patients. Diagnoses were made on the basis of clinical and histological data. Renal perfusion was calculated by means of DU. In addition, the arterial Doppler signals were quantified using a pulsatility index (PI). Mean perfusion of normal renal allografts was 0. 47 1/min. A decrease in blood flow could be found in acute vascular and chronic rejection but not in acute cellular rejection. A lack of renal perfusion due to acute vascular rejection was observed in four patients. Mean PI, used as a parameter of DU, rose significantly in all forms of rejection, which could be diagnosed with a sensitivity of 93% and a specificity of 86%. Cyclosporin overdosage did not alter the Doppler flow shape.     

Monitoring of renal allografts by duplex ultrasound

Deterioration of renal transplant function due to rejection is accompanied by changes in renal blood flow that can be measured by duplex ultrasound (DU). In the present study, 60 transplanted patients were followed up. A total of 233 duplex examinations, 68 percutaneous biopsies, 44 renal scintigraphies, and 6 transplant nephrectomies were performed on these patients. Diagnoses were made on the basis of clinical and histological data. Renal perfusion was calculated by means of DU. In addition, the arterial Doppler signals were quantified using a pulsatility index (PI). Mean perfusion of normal renal allografts was 0.47 l/min. A decrease in blood flow could be found in acute vascular and chronic rejection but not in acute cellular rejection. A lack of renal perfusion due to acute vascular rejection was observed in four patients. Mean PI, used as a parameter of DU, rose significantly in all forms of rejection, which could be diagnosed with a sensitivity of 93% and a specificity of 86%. Cyclosporin overdosage did not alter the Doppler flow shape.     

Renal expression and urinary concentration of EGF and IL-6 in acutely dysfunctioning kidney transplanted patients

Background: Despite marked improvements in the success of solid organ transplantation, a significant percentage of transplanted organs is lost due to recurrent episodes of acute cellular rejection. The mechanisms that govern allograft rejection likely include a complex regulatory network of multiple cytokines and growth factors. Design and Method: This study investigated the kidney gene (in situ hybridization) and protein (immunohistochemistry) expression and the urinary excretion rate of IL-6 and EGF in 29 renal transplant recipients: 16 with acute cellular rejection (AR) and 13 with acute tubular damage/cyclosporine toxicity (ATD). Results: AR patients displayed a 4-fold increase of renal IL-6 expression, which localized chiefly to proximal tubular cells and monocytes/macrophages, whereas EGF signal was extremely weak or even absent. In ATD patients, EGF expression was markedly reduced, while IL-6 specific signal was unchanged. In all the patients examined the renal expression of IL-6 and EGF strictly correlated with their urinary excretion rate (r:0.459, P:0.001). Thus, urinary IL-6/EGF ratio was markedly increased in the former group (>20-fold at day 1), where it parallelled the modifications of plasma creatinine over time (r:0.603, P <0.0001), and was only slightly increased in the latter group (<3-fold). Conclusion: Kidney transplanted patients with acute cellular rejection or acute tubular damage/CyA nephrotoxicity exhibit a distinctly different pattern of intragraft expression of IL-6 and EGF, which is closely reflected by their rate of urinary excretion.     

Predictability of renal allograft prognosis during rejection crisis by ultrasonic Doppler flow technique

Using the ultrasonic Doppler technique, renal blood flow was measured in 67 patients who underwent living related renal transplantation from January, 1976 to December, 1979. In 58 of 67 cases, 81 acute and 9 chronic rejection episodes occurredinitial stage of acute rejection, there are no particular changes in the pattern of systolic blood flow a. In the nd by contrast marked changes of diastolic flow. The disappearance of the diastolic phase is indicative of an advanced stage of rejection, the reappearance indicative of recovery from rejection, and persistent loss accompanied by changes of systolic flow indicative of an unfavorable prognosis of rejection. In chronic rejection, there are rapid changes of neither systolic nor diastolic flow though the acceleration time in the systolic phase lengthens gradually. The ultrasonic Doppler flow technique for blood flowmetry of a transplanted kidney is a useful means of knowing the prognosis of rejection and provides an index for corticosteroid bolus therapy.     

Histological evaluation of renal allograft protocol biopsies in the early period and 1 year after transplantation

Abstract:  We histologically evaluated protocol biopsy specimens of renal allografts obtained in the early period and 1 year after transplantation. The patients were divided into those with at least one history of acute rejection (AR group) and no history of rejection (NAR group), and the histopathological features in the two groups were compared. A total of 45 early protocol biopsy specimens were obtained from 40 patients, and 31 1-year biopsy specimens were obtained from 30 patients. Acute rejection (AR) or borderline change was observed in the early protocol biopsy specimens from 19 (45.2%) cases. AR or borderline change was observed in 12 of 19 (63.2%) in the AR group, and in 7/26 cases (26.9%) in the NAR group. The incidence of AR or borderline change in the AR group was higher than in the NAR group. Toxic tubulopathy was found in the early protocol biopsy in 16 cases (35.6%). The 1-year biopsies tended to reveal more complicated findings. Chronic rejection (CR) was seen in 8/16 cases (50.0%) in the AR group, and it was more frequent than NAR group (two cases, 13.3%). In conclusion, the incidences of both AR and CR were higher in the cases with a previous episode of AR. The early protocol biopsy was useful in screening for subclinical AR and toxic tubulopathy. The 1-year biopsy was useful for evaluating various types of chronic graft damage. We expect that adequate treatment based on protocol biopsy findings in each patient will lead to better graft survival.     

Evaluation of OKT3 monoclonal antibody and anti-thymocyte globulin in the treatment of steroid-resistant acute allograft rejection in pediatric renal transplants

We reviewed the effectiveness of Muromonab-CD₃ (OKT3) and anti-thymocyte globulin (ATG) in the treatment of corticosteroid-resistant acute renal allograft rejection in 49 transplanted children. Reversal of rejection was successful in 22 of 23 patients (96%) treated with OKT3 and 21 of 26 (81%) treated with ATG (P=NS). Re-rejection episodes occurred within 1 month of cessation of therapy in 9 of 22 patients treated with OKT3 but only in 2 of 21 who received ATG (P<0.05). In the patients with re-rejection, 7 of the 9 patients originally given OKT3 and 1 of the 2 who received ATG responded to a repeat course of high-dose corticosteroids; thus, at 1 month post treatment, the incidence of graft loss due to initial rejection or re-rejection was 13% for the OKT3 and 23% for the ATG group (P=NS). Graft survival was similar at 6 months: 82% for OKT3- and 73% for ATG-treated patients (P=NS); 100% patient survival was noted in both groups. Mean calculated creatinine clearance prior to, during, and at 1 and 6 months post rejection was similar in the OKT3- and ATG-treated groups. Neutropenia and thrombocytopenia occurred more frequently in the ATG group, but there was no significant difference in infectious complications. Two patients developed high (1:1,000) OKT3 antibody titers. In our experience, children with corticosteroid-resistant acute renal allograft rejection treated with OKT3 and ATG had similar allograft survival and level of renal function at 1 and 6 months, and number of infectious complications post therapy.     

多药耐药基因表达与肾移植急性排斥机制的初步探讨

目的：研究多药耐药基因（MDR1）与肾移植受者急性排斥的关系。方法：用定量RT-PCR技术分别检测14全我急性排斥受者和28例肾功能稳定受者MDR1表达水平，并与36例尿毒症患者比较；14例健康人作为对照组。结果：MDR1阳性表达率急性排斥受者为85.7%。肾功能稳定受者为71.4%。尿毒症患者为44.4%，前二者表达率均高于尿毒症患者，而且急性排斥受者MDR1含量大于肾功能稳定的受者。结论：在肾移植受者中表达增加可能是肾移植受者获得对CsA耐受从而在CsA治疗浓度下发生排斥的机制之一。