CD3 AK细胞提高烧伤患者细胞免疫功能的研究

目的 探索治疗烧伤患免疫功能低下的新方法。方法 用无血清培养法培养CD3AK细胞,治疗大面积烧伤患,类似患另设对照组进行普通治疗,观察不同时相点两组患的细胞免疫指标变化。结果 同对照组相比,经体外培养的CD3AK细胞治疗后,患T细胞亚群中CD4细胞比例升高,CD8细胞比例下降,CD4／CD8细胞比值升高。血清可溶性白介素2受体水平下降,T淋巴细胞转化活性增强,NK细胞活性增强。结论 无血清培养法培养的CD3AK细胞,能改善烧伤患细胞免疫功能低下的状态,促进细胞免疫功能恢复。     

Localization of Adenylate Kinase 4 in Mouse Tissues

Adenylate kinase (AK) is a key enzyme in the high-energy phosphoryl transfer reaction in living cells. Of its isoforms, AK4 has a similar sequence and subcellular localization to that of AK3 in the mitochondrial matrix. However, unlike AK3, AK4 lacks the guanosine triphosphate: adenosine monophosphate phosphotransferase activity. To elucidate the physiological role of AK4, we explored the protein localization of AK4 in various mouse tissues by immunohistochemical analysis. AK4 protein was detected in the kidney, liver, brain, heart, stomach, intestine, and gonads but not in the lung and spleen. Interestingly, cell-type specific expression was evident in the brain, gastrointestinal tract, and gonads. In the cerebellum, AK4 was detected in granular cells but not in Purkinje cell bodies. In the gastrointestinal tract, AK4 was highly expressed in epithelia. In the ovary, AK4 was detected in oocytes and corpora lutea. In the testis, AK4 was detected in spermatocytes but not in spermatogonia. Our findings demonstrate that AK4 localizes uniquely in a cell-type and tissue-specific manner in mouse tissues.     

CD3AK细胞抗肿瘤作用与MHC限制性关系

目的 研究抗CD3单克隆抗体激活的杀伤细胞(anti-CD3McAb activated killer cells,CD3AK细胞)杀伤肿瘤细胞作用与MHC限制性的关系。方法 采用微量淋巴细胞毒实验方法测定CD3AK细胞及肿瘤细胞MHC表型，用MTT法测定CD3AK细胞杀伤活性。结果 (1)不同人来源的CD3AK细胞，其MHC表型不同，但对同种肿瘤传代细胞都有很强的杀伤作用，且不同人来源的CD3AK细胞间杀伤作用差异无显著性(P＞0．05)；(2)同一来源CD3AK细胞对不同肿瘤传代细胞株(MHC表型不同)的杀伤作用差异无显著性(P＞0．05)；(3)人外周血诱导的CD3AK细胞对鼠肿瘤细胞株(Yac—1)与对人肿瘤传代细胞株(K—562，Raji)一样具有很强的杀伤作用。结论 CD3AK细胞杀伤肿瘤的作用是非MHC限制的，在临床应用中可用正常人外周血诱导得到的CD3AK细胞体外培养增殖后输给肿瘤病人进行治疗。该效应细胞来源方便，可用于肿瘤术后清除残留肿瘤细胞，具有重要应用价值。