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表达IDO的Kupffer细胞在体内外对同种异体T淋巴细胞的凋亡作用

发布时间:2019-07-05 05:14
【摘要】:目的:探讨表达IDO的KC在体内外对同种异体T淋巴细胞增殖的抑制和凋亡作用。 方法:联合链酶蛋白酶和胶原酶在体灌注和离体消化的方法分离小鼠KC,实时荧光定量PCR检测经IFN-γ处理或未处理的KC表达IDOmRNA和FasLmRNA的情况。高压液相色谱仪分析IDO对色氨酸的分解作用以了解其活性。~3H嵌入增殖试验检测KC对同种异体T淋巴细胞增殖的抑制情况。流式细胞仪分析KC对同种异体T淋巴细胞的细胞周期和凋亡作用。构建BABL/c→C57BL/6的皮肤移植模型,分为KC(未处理)、KC(IFN-γ,处理)、KC(1—MT)及生理盐水组,除了生理盐水组外,,于移植术前14、7、2天给受体输入供体KC,同时1—MT组于移植术后0~7天经腹腔注射1—MT(0.9mg/kg/d),观察各组别对皮肤移植物存活时间的影响。于移植术后第7天每组各取1只行小鼠皮瓣HE染色和TUNEL以检测淋巴细胞浸润和凋亡情况。Kaplan-Meier对数秩检验对各组进行生存分析。 结果:实时荧光定量PCR提示KC并不组成性表达IDO,但是经IFN-γ处理后,IDO和FasL在6h后表达量相对较高。IDO能降低培养基中色氨酸的浓度,升高其代谢产物犬尿氨酸浓度。表达IDO的KC能明显抑制同种异体T淋巴细胞的增殖,但1-MT和抗FasL抗体能部分阻断其增殖抑制作用,并且存在剂量依赖关系。表达IDO和FasL的KC能阻止同种异体T淋巴细胞于G1中期,诱导其凋亡。输入表达IDO和FasL的
文内图片:培养24h后KC的形态X100
图片说明:培养24h后KC的形态X100
[Abstract]:Aim: to investigate the inhibitory effect of KC expressing IDO on the proliferation and apoptosis of allogenic T lymphocytes in vitro and in vivo. Methods: the expression of IDOmRNA and FasLmRNA in mouse KC, treated or untreated KC was detected by real-time fluorescence quantitative PCR combined with streptozyme protease and collagenase in vivo perfusion and in vitro digestion. The decomposition effect of IDO on tryptophan was analyzed by high pressure liquid chromatography (HPLC) to understand its activity. The inhibitory effect of KC on the proliferation of allogenic T lymphocytes was detected by ~ 3 H embedding proliferation test. The cell cycle and apoptosis of allogenic T lymphocytes were analyzed by flow cytometry. The skin transplantation model of BABL/c 鈮

本文编号:2510267

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