A novel serine esterase expressed by cytotoxic T lymphocytes

A novel serine esterase expressed by cytotoxic T lymphocytes
复制标题

一种由细胞毒性T淋巴细胞表达的新型丝氨酸酯酶

DOI:
--
复制
发表时间:
1985
期刊:
影响因子:
64.8
通讯作者:
H. Eisen
H. Eisen
中科院分区:
综合性期刊1区
文献类型:
--
作者:
M. Pasternack;H. Eisen

文献摘要

参考文献

被引文献

相似文献

细胞毒性T(Tc)淋巴细胞识别并裂解靶细胞,被认为是抵抗病毒感染1和可能抵抗肿瘤2的重要防御。负责这些细胞识别抗原的受体的性质变得越来越清楚,但负责其细胞溶解活性的分子机制仍然很大程度上未知。蛋白酶参与这一过程的可能性已被某些底物的作用所暗示3,4。在这里,我们表明,小鼠Tc细胞克隆具有相当大的胰蛋白酶样酯酶活性时,通过灵敏的比色法测定。此活性可被二异丙基氟磷酸酯(DFP)和苯甲基磺酰氟(PMSF)完全阻断,但不能被Nα-甲苯磺酰赖氨酰氯甲基酮(TLCK)阻断。用~ 3 H-DFP作亲和标记试剂,证明酯酶活性存在于相对分子质量(Mr)为28,000(28 K)的蛋白质中。各种各样的其他淋巴细胞,包括来自胸腺、脾脏和淋巴结的淋巴细胞、建立的B细胞系和非细胞毒性T细胞以及T辅助细胞克隆,其酯酶活性比Tc细胞克隆低约300倍,而DFP反应性28 K蛋白的量要少得多。然而,在胸腺细胞的酯酶活性增加20-50倍,28 K蛋白变得更加突出后4天,这些细胞已在体外刺激产生Tc细胞。
Cytotoxic T (Tc) lymphocytes recognize and lyse target cells and are thought to serve as an important defence against viral infections1 and possibly against neoplasms2. The nature of the receptors responsible for antigen recognition by these cells is becoming clearer, but the molecular mechanisms responsible for their cytolytic activity remain largely unknown. The possibility that proteases are involved in this process has been suggested by the effects of certain inhibitors3,4. Here we demonstrate that clones of murine Tc cells possess considerable trypsin-like esterase activity when assayed by a sensitive colorimetric assay. This activity was blocked completely by two serine esterase inhibitors, diisopropylfluorophosphoridate (DFP) and phenylmethylsulphonyl fluoride (PMSF), but not by Nα-tosyl lysyl chloromethyl ketone (TLCK). The use of 3H-DFP as an affinity-labelling reagent demonstrated that the esterase activity resides in a protein of relative molecular mass (Mr) 28,000 (28K). A wide variety of other lymphocytes, including those from thymus, spleen and lymph node, established lines of B cells and noncytotoxic T cells, and clones of T helper cells, had about 300-fold less esterase activity than the Tc-cell clones and far smaller amounts of the DFP-reactive 28K protein. However, in thymocytes the esterase activity increased 20–50-fold and the 28K protein became more prominent 4 days after these cells had been stimulated in vitro to generate Tc cells.
大分子抗蛋白酶抑制人类天然细胞毒性。
DOI: --
发表时间: 1981
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Hudig,D;Haverty,T;Fulcher,C;Redelman,D;Mendelsohn,J
通讯作者: Mendelsohn,J
人类淋巴细胞介导的天然细胞毒性 (NK) 对蛋白酶活性的要求:证据表明蛋白酶是丝氨酸依赖性的,并且具有芳香族氨基酸裂解特异性。
DOI: --
发表时间: 1984
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Hudig,D;Redelman,D;Minning,LL
通讯作者: Minning,LL
克隆树突状细胞对 T 依赖性反应的免疫调节。
DOI: --
发表时间: 1984
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Clayberger,C;DeKruyff,RH;Fay,R;Pavlakis,M;Cantor,H
通讯作者: Cantor,H
小鼠 B 淋巴母细胞系的体外自发发生和长期培养。
DOI: --
发表时间: 1983
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Braun,J
通讯作者: Braun,J
N-α-甲苯磺酰-L-赖氨酰-氯甲基-酮 (TLCK) 对克隆的细胞毒性 T 淋巴细胞的作用位点。
DOI: --
发表时间: 1983
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
作者:
Pasternack,MS;Sitkovsky,MV;Eisen,HN
通讯作者: Eisen,HN