机构地区:[1]苏州大学附属第一医院,江苏省血液研究所,苏州大学造血干细胞移植研究所,卫生部血栓与止血重点实验室,血液学协同创新中心,215006
出 处:《中华器官移植杂志》2017年第2期90-94,共5页Chinese Journal of Organ Transplantation
基 金:基金项目:江苏省科教兴卫工程-临床医学中心(ZX201102)、江苏省血液病临床医学研究中心(江苏省科技厅生命健康专项一BL2012005)、国家临床重点专科建设项目、江苏省创新能力建设专项(BM2015004)、国家自然科学基金面上项目(81270617、81470346),江苏省自然科学基金面上项目(BK20161204),江苏省六大高峰人才资助,江苏省“333”工程人才资助(BRA2015497),江苏省卫生厅项目(H201416),江苏省青年人才资助
摘 要:目的 探讨过氧化物酶体增殖物激活受体γ(PPARγ)表达在异基因造血干细胞移植(allo-HSCT)后急性移植物抗宿主病(aGVHD)中的作用及临床意义.方法 选择2013年6月到2016年4月接受异基因造血干细胞移植的65例受者,收集移植后15、30、60、90 d以及当受者发生aGVHD时的外周血样本,同时收集10例正常志愿者外周血样本作为正常对照,采用实时荧光定量聚合酶链反应法定量检测PPARγ、γ干扰素(WN-γ)及T-bet mRNA的表达水平,分析PPARγ表达水平与aGVHD及TH1细胞因子IFN-γ和T-bet表达的相关性.在体外进行淋巴细胞混合实验,采用CCK8试剂盒检测PPARγ激动剂罗格列酮对淋巴细胞增殖的影响.结果 65例受者中移植后90d内有45例发生aGVHD(aGVHD组),20例未发生aGVHD(无aGVHD组).正常志愿者外周血PPARγ表达量明显低于移植后90 d内的受者(P<0.05).未发生aGVHD的受者移植后90 d内PPARγ的表达量无明显变化.aGVHD组受者PPARγ的表达量比无aGVHD组受者表达量降低(P<0.05).发生Ⅲ~Ⅳ度aGVHD受者的PPARγ表达量显著低于发生Ⅰ~Ⅱ度aGVHD受者,二者比较,差异有统计学意义(P<0.05).在aGVHD组,TH1细胞相关因子IFN-γ、T-bet的表达明显升高,且与PPARγ的表达存在负相关(P<0.05).体外淋巴细胞混合实验显示,PPARγ激动剂罗格列酮在25 μmol/L及以上浓度对淋巴细胞增殖剂量依赖性抑制(P<0.01).结论 PPARγ表达与aGVHD的发生及严重程度存在相关性,PPARγ激动剂可以抑制淋巴细胞的增殖,可能成为治疗aGVHD的新方法.Objective To explore the role of peroxisome proliferator-activated receptor (PPAR)-gamma (γ) in acute graft versus host disease (aGVHD) after allogenic hematopoietic stem cell transplantation (allo-HSCT).Methods Sixty-five patients under allo-HSCT during 2013.06 to 2016.04 and 10 healthy controls were enrolled in this study.Peripheral blood (PB) of patients was collected at 15th,30th,60th,and 90th day after allo-HSCT and at the onset of aGVHD.The mRNA expression of PPARγ,IFNγ and T-bet was detected by the real-time PCR.Furthermore,we conducted mixed lymphocyte reaction (MLR) to detect the proliferation of active lymphocytes under different concentrations of PPARγ agonist rosiglizone.Results Among 65 patients after allo-HSCT,aGVHD occurred in 45 patients within 90 days.The expression of PPARγ mRNA in healthy controls was significantly lower than that in patients after allo-HSCT within 90 days (P〈 0.05).The expression of PPARγ mRNA hold steady in non-GVHD patients within 90 days after allo-HSCT,and was significantly lower in GVHD group than in non-GVHD group (P〈0.05).The PPARγ expression in severe aGVHD (grade Ⅲ-Ⅳ) was lower than in mild aGVHD (grade Ⅰ-Ⅱ) patients (P〈0.05).The expression of IFNγ and T-bet was increased in aGVHD patients and negatively correlated with PPARγ mRNA expression (P 〈 0.05).The experiment of MLR revealed that PPARγ agonist rosiglitazone above 25 μmol/L could dose-dependently inhibit the proliferation of lymphocytes.Conclusion Low expression of PPARγ is associated with aGVHD occurrence and degree.PPARγ agonist can inhibit the proliferation of lymphocytes,which may be a new way to treat aGVHD.
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