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目的研究肝组织中程序性死亡受体1(PD-1)与自身免疫性肝炎(AIH)炎性反应的关系。方法选择60例AIH患者为研究对象,根据疾病活动程度分为AIH缓解期组18例、AIH活动期组42例。另选同期60名健康体检者为健康对照组。采用免疫组织化学卵白素-生物素-酶复合物染色法检测研究对象PD-1表达并进行比较,分析PD-1表达与AIH炎性反应的关系,并观察PD-1与总胆红素、丙氨酸氨基转移酶、天冬氨酸氨基转移酶的相关性。结果 AIH患者PD-1阳性表达率显著高于健康对照者(P0.05),AIH活动期组PD-1阳性表达率显著高于AIH缓解期组及健康对照组(P0.05)。G0级AIH患者PD-1阳性表达率显著低于G1~G2级及G3~G4级(P0.05),G1~G2级AIH患者PD-1阳性表达率显著低于G3~G4级(P0.05)。PD-1表达与总胆红素、天冬氨酸氨基转移酶、丙氨酸氨基转移酶呈正相关(r=0.853、0.863、0.884,均P0.01)。结论 PD-1与AIH炎性反应活动程度存在一定相关性,提示PD-1可能参与AIH的发生及发展。 相似文献
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程序性死亡受体-1(PD-1)是用消减杂交技术从发生程序性死亡的T细胞株中分离得到的一种跨膜蛋白,是一种负向协同刺激分子。PD-1是活化T细胞表面的一种抑制性受体,与病毒特异性CD8^+T细胞的功能耗竭有着密切关系。在乙型肝炎病毒和丙型肝炎病毒慢性感染过程中PD-1表达增强,阻断PD-1信号通路可以使耗竭的CD8^+T细胞恢复免疫效应功能,有助于病毒清除,本文就PD-1与病毒性肝炎的关系及其在治疗中应用的前景作一综述。 相似文献
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目的 探讨自身免疫性肝炎(AIH)患者血清白介素-21(IL-21)和趋化因子水平变化及其临床意义。方法 2015年3月~2017年3月我院收治的21例AIH患者,采用ELISA法检测血清IL-21及趋化因子C-C-基元配体20(CCL20)、趋化因子配体9(CXCL9)、趋化因子C-C-基元受体6(CCR6)、趋化因子C-X-C-基元受体3(CXCR3)水平,常规行肝活检。应用受试者工作特征曲线(ROC)下面积(AUC)分析血清IL-21水平预测AIH患者病情和判断肝组织炎症活动分级的效能。结果 5例重症AIH患者血清ALB、ALT、AST、INR、TBIL、CCL20、CCR6和IL-21水平分别为(2.6±0.2) g/dL、(716.8±363.2) U/L、(632.6±334.9) U/L、(1.4±0.7)、(96.1±4.2) μmol/L、(263.2±123.8) pg/mL、(162.4±70.3) pg/mL和(400.2±102.3) pg/mL,与16例轻中症组[分别为(3.7±0.4) g/dL、(384.5±143.7) U/L、(327.1±98.6) U/L、(1.2±0.3)、(25.8±4.3) μmol/L、(147.5±63.7) pg/mL、(63.8±25.3) pg/mL和(256.3±122.6) pg/mL]比,差异显著(均P<0.05),而外周血PLT计数为(110.4±2.8)×109/L,显著低于轻中症组的(170.4±5.3)×109/L(P<0.05);单因素分析显示,7例肝组织G3~4级患者上述指标与14例G1~2级组比,差异有统计学意义(P<0.05),而两组患者外周血WBC、血清CXCL9、CXCR3和IgG水平比较差异无统计学意义(P>0.05);以血清IL-21水平大于380 pg/mL为截断点,预测AIH患者临床病情严重的AUC为0.900(95%CI:0.690~0.987),其敏感性为80.0%,特异性为100.0%;以血清IL-21水平>405.7 pg/mL为截断点,判断AIH患者肝组织炎症分级>S3的AUC为0.857(95%CI:0.605~0.976),其敏感性为100.0%,特异性为70.0%;多因素Logistic回归分析结果显示,血清IL-21≥405.7 ng/mL为判断AIH患者肝组织重度炎症活动的独立因子(OR为5.673,95%CI为2.952~9.118,P=0.000)。结论 检测血清IL-21水平可能有助于判断AIH患者病情和肝组织炎症活动度,对评估病情有一定的临床意义。 相似文献
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目的 探讨HIV感染及抗病毒治疗对程序性死亡受体-1(programmed death-1, PD-1)表达的影响。方法 根据是否接受抗病毒治疗将61例HIV/AIDS患者分为治疗组及未治疗组,并以35例健康者作为对照。利用逆转录聚合酶链反应(RT-PCR)技术探究基因PD-1 mRNA在人外周血单个核细胞(PBMC)中的表达;通过双夹心抗体ELISA法测定血清中可溶性PD-1(sPD-1)表达水平。并比较不同CD4+ T淋巴细胞数的HIV/AIDS患者血清sPD-1的差异。结果 未治疗组、治疗组、健康组研究对象PBMC中PD-1 mRNA的相对表达量均数分别为0.337 8±0.064、0.578 2±0.073和0.771 5±0.124,健康组与未治疗组差异极显著,健康组与治疗组、治疗组与未治疗组之间差异显著(P=0.031、P=0.043);未治疗组、治疗组、健康组血清sPD-1浓度分别为42.22±2.21 ng/mL、38.24±2.79 ng/mL和29.88±1.41 ng/mL。健康组与未治疗组、治疗组,治疗组与未治疗组分别具有显著性差异(P=0.008、P=0.040和P=0.020)。差异性分析结果表明,未治疗组、治疗组CD4+T淋巴细胞数<350 个/mm3患者血清sPD-1水平均显著高于CD4+T淋巴细胞数>350 个/mm3患者。结论 抗病毒治疗在一定程度上使高水平sPD-1表达下调以促使PD-1/PD-L1通路的恢复,从而促进机体免疫重建。监测PD-1 mRNA及sPD-1的表达在HIV的辅助诊断和推断病情发展上具有一定的价值。 相似文献
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T1DM是胰岛β细胞损伤导致的Ins绝对缺乏的自身免疫性疾病。程序性死亡受体1(PD-1)/程序性死亡受体配体1(PD-L1)通路,负性调节T细胞功能维持机体自身免疫稳态,在T1DM发生发展中起重要作用。本文综述PD-1/PDL-1通路在T1DM中的研究进展。 相似文献
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目的 探讨自身免疫性肝炎(AIH)患者外周血CD8+T细胞程序性死亡因子(PD-1)表达水平的变化。方法 随机选取我院收治的AIH患者25例和健康志愿者25例,使用流式细胞仪进行检测外周血CD8+T 淋巴细胞PD-1分子和PD-1分子受体(PD-L1)表达水平。结果 与健康人比,AIH血CD8+T细胞PD-1/PD-L1表达阳性百分比分别为(2.6±0.1)%和(2.1±0.8)%,明显高于健康人【(0.5±0.2)%和(0.4±0.1)%,P<0.01);10例男性AIH患者血CD8+T细胞PD-1/PD-L1表达阳性百分比分别为(1.4±0.5)%和(2.3±0.6)%,显著低于15例女性患者【(3.8±0.8)%和(2.5±0.5)%),P<0.05);经皮质激素治疗4 w,25例AIH患者获得病情缓解。AIH患者在缓解期PD-1/PD-L1表达水平分别为(3.3±0.2)%和(2.8±0.3)%。结论 AHI患者外周血CD8+T细胞PD-1表达水平升高,与疾病活动可能存在密切的关系。 相似文献
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[目的]观察程序性死亡受体1(PD1)和程序性死亡配体1(PD-L1)在结肠癌患者组织中的表达,并分析两者表达水平与患者临床病理特征及预后的相关性关系。[方法]采用免疫组织化学法检测112例结肠癌患者结肠癌组织及癌旁组织中PD-1、PD-L1蛋白表达水平,分析结肠癌组织PD-1、PD-L1蛋白表达水平与患者临床病理特征、预后的相关性,同时分析影响结肠癌患者生存期的多元因素。[结果]结肠癌组织PD-1、PD-L1蛋白表达水平均明显高于癌旁组织(P<0.05);结肠癌组织PD-1、PD-L1蛋白表达水平与TNM分期、分化程度、浸润深度、脉管侵犯及淋巴结转移等临床病理特征存在明显的相关性(P<0.05);PD-1高表达组(n=67)3年累计生存率(67.2%)及中位生存时间(20.2个月)均明显低于PD-1低表达组(88.9%)及中位生存时间(31.6个月)(P<0.05)。PD-L1高表达组3年累计生存率(71.0%)及中位生存时间(21.5个月)均明显低于PD-L1低表达组(92.0%)及中位生存时间(32.2个月)(P<0.05);TNM分期晚、分化程度低、浸润深度深、脉管浸润、淋巴结转移、PD-1蛋白和PD-L1蛋白表达阳性均为影响结肠癌患者预后生存期的独立危险因素(P<0.05)。[结论]结肠癌组织PD-1、PD-L1蛋白表达水平与TNM分期、分化程度、浸润深度、脉管侵犯及淋巴结转移等临床病理特征存在明显的相关性,可作为预测结肠癌患者预后的重要指标。 相似文献
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目的研究自身免疫性肝炎患者外周血CD8+T淋巴细胞程序性死亡受体1(PD-1)表达的变化。方法选择自身免疫性肝炎患者22例和健康人20例,使用流式细胞仪检测所有被研究者外周血CD8+T淋巴细胞PD-1分子的表达状况,比较不同分期和不同性别疾病患者PD-1表达水平。结果自身免疫性肝炎患者外周血CD8+T淋巴细胞PD-1分子阳性百分比为2.5±0.5%,显著高于健康对照组(0.5±0.1%,P<0.001);自身免疫性肝炎发病期患者CD8+T淋巴细胞表达PD-1百分比为2.6±0.7%,与缓解期比无统计学差异(3.4±0.8%);16例女性AIH患者外周血CD8+T淋巴细胞PD-1阳性百分比为3.5±0.7%,亦略高于6例男性患者的1.3±0.3%,但无显著统计学差异(P=0.1021),可能与例数较少有关。结论自身免疫性肝炎患者CD8+T淋巴细胞PD-1表达率增加,PD-1可能在自身免疫性肝炎的发病中起了重要作用。 相似文献
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目的 探究自身免疫性肝炎(AIH)患者血清腺苷脱氨酶(ADA)水平及其与肝组织炎症活动及预后的关系。方法 2013年4月~2016年5月我院收治的70例AIH患者,采用ELISA法检测血清ADA水平,常规行肝活检,应用受试者工作特征(ROC)曲线下面积(AUC)评价各指标诊断肝组织界面炎的效能,采用Logistic回归分析影响AIH患者对治疗应答不良的因素。结果 53例AIH活动期、17例缓解期患者和38例健康人血清ADA水平分别为(30.2±7.1) U/L、(16.5±4.3) U/L和(12.9±2.2) U/L,差异显著(P<0.05);17例轻度、21例中度和32例重度肝组织界面炎患者血清ADA水平分别为(16.5±4.3) U/L、(26.0±4.7) U/L和(32.9±7.2) U/L,差异显著(P<0.05);血清ADA诊断严重界面炎的曲线下面积(AUC)等于0.867(95%CI:0.764~0.936),最佳截断点为22.1 U/L,其敏感度和特异性分别为100.0%和63.2%;单因素分析显示女性、血清ADA、ALT、AST、TBIL、GGT、ALP、IgG、IgM水平、抗gp210抗体阳性和肝硬化可能与AIH患者对治疗应答不良有关,经Logistic回归分析显示血清ADA、ALP和肝硬化是AIH患者对治疗应答不良的危险因素。结论 AIH患者血清ADA水平与肝组织炎症活动度密切相关,并可能影响对治疗的应答,可协助预判对治疗的应答反应,从而可帮助选择合适的治疗患者。 相似文献
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目的 观察慢性丙型肝炎(CHC)患者抗病毒治疗24周时外周血CD4+和CD8+T淋巴细胞(T细胞)表面表面程序性死亡1 (PD-1)和程序性死亡配体1(PD-L1)表达水平,分析其与抗病毒治疗临床转归的关系.方法 24例CHC患者,均采用聚乙二醇干扰素α-2a (Peg-IFN α-2a)每周皮下注射一次,联合利巴韦林800 ~ 1200 mg/d,治疗24 ~ 48周.采用流式细胞术和实时荧光定量检测患者治疗前、治疗4、12、24周外周血CD4+和CD8+T细胞表面PD-1、PD-L1表达水平和外周血HCV RNA,全自动生化分析仪检测ALT.采用SPSS16.0软件.两样本计量结果分析采用t检验,治疗前后的计量结果采用重复测量的单因素或两因素方差分析,所有检验为双侧检验. 结果 CHC患者治疗后4周HCV RNA阴性者19例,CD4+和CD8+T细胞表面PD-1的表达率在治疗前分别为18.6%±6.1%和16.6%±13.8%,治疗24周时分别为10.3%±7.7%和9.4%±4.6%,治疗前后比较,PD-1的表达明显下降,F值为12.406和4.955,P值为0.002和0.039,差异有统计学意义.CD8+T细胞表面PD-L1的表达率在治疗前为17.5%±13.7%,治疗4、12、24周时分别为25.9%±11.1%、29.6%±15.1%、32.0%±15.7%,治疗后明显升高,F值分别为9.063、8.365、9.736,P值均<0.01.治疗4周时,HCV RNA阳性者5例,仅发现CD8+T细胞表面PD-L1的表达治疗24周(39.2%±15.6%)与治疗前(17.4%±16.7%)比较明显升高,F=10.292,P=0.033.持续病毒学应答者20例:CD4+T细胞表面PD-1的表达在治疗4、12、24周分别为14.4%±7.5%、14.0%±6.9%、10.7%±7.6%,治疗前为20.2%±7.5%,与治疗前比较明显下降,F值分别为6.133、5.541、14.780,P<0.05或P<0.01.CD8+T细胞表面PD-1的表达在治疗12、24周分别为10.2%±4.6%和10.1%±4.9%,治疗前为16.8%±13.4%,治疗前后比较,PD-1的表达在治疗后明显下降,F值为4.964和4.613,P值均<0.05.CD8+T细胞表面PD-L1的表达在治疗12、24周分别为30.8%±16.6%和35.2%±16.5%,治疗前为19.0%±14.5%,治疗后明显升高,F=6.442,P=0.020和F=12.349,P=0.002.复发组4例,各治疗时间点PD-1和PD-L1与治疗前比较,差异无统计学意义.结论 快速有效的抗病毒治疗可以下调CHC患者外周血CD4+和CD8+T细胞表面PD-1的表达,上调CD8+T细胞表面PD-L1的表达.CHC患者外周血CD4+和CD8+T细胞表面PD-1和PD-L1表达水平的变化可能与患者抗病毒治疗临床转归存在关系. 相似文献
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Kristian Aarslev Anders Dige Stinne R. Greisen Martin Kreutzfeldt Niels Jessen Hendrik Vilstrup 《Scandinavian journal of gastroenterology》2017,52(1):93-99
Purpose: Autoimmune hepatitis (AIH) is a chronic liver disease caused by impaired immune regulation. Programmed death-1 (PD-1) is an inhibitory receptor mainly expressed by T cells and with its ligands, PD-L1 and PD-L2 present on antigen-presenting cells. We hypothesised the PD-1 axis to be impaired in AIH and investigated systemic levels of soluble(s) PD-1 and T cells ability to up-regulate PD-1 following in vitro activation in AIH patients.Materials and methods: We included 67 AIH patients; 9 with active disease, 31 responders and 27 incomplete-responders to standard therapy. Forty-seven healthy controls (HC) were included for comparison. Soluble PD-1 was measured by enzyme-linked immunosorbent assay. The PD-1 expression on T cells was measured using flow cytometry before and after 48-h stimulation in vitro with CD3/CD28 in 13 AIH patients and 10 HC.Results: Soluble PD-1 was significantly elevated in AIH patients with active disease [0.24?ng/mL (range 0.16–0.28)] and in incomplete responders to standard therapy [0.17 (0.11–0.22)] compared with responders [0.11 (0.08–0.16), p?=?.008 and p?=?.01, respectively] and HC [0.12 (0.05–0.16), p?=?.02, both]. Following in vitro activation, PD-1 was significantly up-regulated (3.3-fold) on CD4+?T cells from AIH patients compared with HC (1.5-fold) (p?=?.0006).Conclusions: AIH patients with active disease and incomplete response to standard treatment have similarly increased sPD-1 levels. Further, AIH patients have increased ability to up-regulate PD-1 following in vitro activation. Together these data suggests an impaired PD-1 axis in AIH. 相似文献
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目的 探讨自身免疫性肝炎(AIH)患者临床和肝组织病理学特征。方法 回顾性分析48例AIH患者的临床特点、血生化指标、免疫学检查和肝组织学特征。结果 48例AIH患者男女比例为 1∶5.8,发病年龄最小者为4岁,平均发病年龄为(45.5±4.2)岁;临床表现以反复肝功能异常(46%)、腹痛(37%)、乏力(35%)、黄疸(19%)为主;血生化指标升高,血清IgG水平升高;抗核抗体、抗平滑肌抗体、抗肝肾微粒体抗体、抗肝可溶性抗原抗体、抗中性粒细胞浆抗体和双链DNA抗体阳性率分别为72%、23%、6%、8%、4%和2%;肝组织存在界面炎、浆细胞浸润和小叶炎症,伴有胆管增生者97%、凋亡小体为87%、纤维隔形成为87%、桥接坏死为27%、“玫瑰花环样”改变为18%。结论 AIH患者多见于女性,40岁以上人群高发,临床表现缺乏特异性,需结合血生化学、免疫学特征做出诊断,肝组织病理学检查具有重要的临床诊断价值。 相似文献
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Min-Wei Yang Xue-Liang Fu Yong-Sheng Jiang Xiao-Jing Chen Ling-Ye Tao Jian-Yu Yang Yan-Miao Huo Wei Liu Jun-Feng Zhang Pei-Feng Liu Qiang Liu Rong Hua Zhi-Gang Zhang Yong-Wei Sun De-Jun Liu 《World journal of gastroenterology : WJG》2019,25(14):1684-1696
BACKGROUND Recently, more and more studies have demonstrated the pivotal role of programmed death 1/programmed death ligand 1(PD-1/PD-L1) pathway in the immune evasion of tumors from the host immune system. However, the role of PD-1/PD-L1 pathway in gastric neuroendocrine carcinomas(G-NECs) remains unknown.AIM To investigate the expression of PD-1/PD-L1 and role of PD-1/PD-L1 pathway in G-NECs, which occur rarely but are highly malignant and clinically defiant.METHODS We investigated the expression of PD-L1 on tumor cells and PD-1^+, CD8^+, and FOXP3^+ T cell infiltration by immunohistochemistry in 43 resected G-NEC tissue specimens. The copy number alterations of PD-L1 were assessed by qRT-PCR.RESULTS Most of the G-NECs tumor cells exhibited a near-uniform expression pattern of PD-L1, while some showed a tumor-stromal interface enhanced pattern. Of the 43G-NECs, 21(48.8%) were classified as a high PD-L1 expression group, and the high expression of PD-L1 was associated with poor overall survival(OS). The high expression of PD-L1 was correlated with abundant PD-1^+ tumor infiltrating lymphocytes(TILs) instead of CD8^+ TILs and FOXP3^+ regulatory T cells(Tregs).Our analysis also suggested that the infiltration of CD8^+ TILs tended to be a favorable factor for OS, although the difference did not reach the statistical significance(P = 0.065). Meanwhile, PD-L1 was significantly overexpressed in cases with copy number gain as compared with those without.CONCLUSION Our data demonstrated for the first time that high expression of PD-L1 in GNECs is associated with a poor prognosis, while the high expression may be due to the copy number variation of PD-L1 gene or stimulation of TILs. These results provide a basis for the immunotherapy targeting PD-1/PD-L1 pathway in GNECs. 相似文献
16.
Åsa Danielsson Borssén Hanns-Ulrich Marschall Annika Bergquist Fredrik Rorsman Ola Weiland Stergios Kechagias 《Scandinavian journal of gastroenterology》2017,52(9):1022-1028
Background: Epidemiological studies of autoimmune hepatitis (AIH) show varying figures on prevalence and incidence, and data on the long-term prognosis are scarce.Objective To investigate the epidemiology, long-term prognosis and causes of death in a Swedish AIH cohort.Material and methods: Data collected from 634 AIH patients were matched to the Cause of Death Registry, and survival analyses were made. Prevalence and incidence were calculated for university hospitals with full coverage of cases and compared to the County of Västerbotten in Northern Sweden.Results: AIH point prevalence was 17.3/100,000 inhabitants in 2009, and the yearly incidence 1990–2009 was 1.2/100,000 inhabitants and year. The time between diagnosis and end of follow-up, liver transplantation or death was in median 11.3 years (range 0–51.5 years). Men were diagnosed earlier (p?<?.001) and died younger than women (p?=?.002). No gender differences were found concerning transplant-free, overall survival and liver-related death. Cirrhosis at diagnosis was linked to an inferior survival (p?<?.001). Liver-related death was the most common cause of death (32.7%). The relative survival started to diverge from the general population 4 years after diagnosis but a distinct decline was not observed until after more than 10 years.Conclusions: Long-term survival was reduced in patients with AIH. No gender difference regarding prognosis was seen but men died younger, probably as a result of earlier onset of disease. Cirrhosis at diagnosis was a risk factor for poor prognosis and the overall risk of liver-related death was increased. 相似文献