Serine esterase in cytolytic T lymphocytes

Serine esterase in cytolytic T lymphocytes
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溶细胞 T 淋巴细胞中的丝氨酸酯酶

DOI:
--
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发表时间:
1986
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;M. Pasternack;C. Verret;Margaret A. Liu;Margaret A. Liu;H. Eisen

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细胞毒性T淋巴细胞(TC细胞)破坏靶细胞的机制尚不清楚。然而,最近的研究发现,在T细胞1和自然杀伤细胞2的胞浆颗粒中含有PERFORE,一种类似补体(C9)3第九组分的细胞溶解蛋白。靶细胞的抗原特异性溶解,传统上仅归因于T细胞,现在也在一些T辅助细胞(Th细胞)系中被证实,这里称为T辅助杀伤细胞或Th/c细胞4-6。我们最近发现了一种新的丝氨酸酯酶,它在克隆的小鼠TC细胞系和一个Th/c细胞系中显著升高,但在两个非细胞溶解Th细胞系7中不存在。这些发现表明,丝氨酸酯酶参与了细胞溶解活性,各种效应细胞具有共同的细胞溶解机制。为了探索丝氨酸酯酶在这一过程中的作用,我们一直在研究这种酶在小鼠T细胞中的其他性质。结果表明:(1)它是一种膜结合的二硫键二聚体;(2)它具有类胰酶性质,但不是一种普通的酶;(3)密度梯度离心法中,它与穿孔素沉淀;(4)它是由T细胞在细胞溶解攻击靶细胞时分泌的;(5)T细胞丝氨酸酯酶的抗血清在Th/c细胞中与该酶发生反应。
The mechanisms that enable cytotoxic T lymphocytes (Tc cells) to destroy target cells are only vaguely understood. However, recent studies have identified in Tc cells1 and natural killer cells2 cytoplasmic granules that contain perform, a cytolytic protein that resembles the ninth component of complement (C9)3. Antigen-specific lysis of target cells, traditionally ascribed solely to Tc cells, has now also been demonstrated in some T-helper cell (Th cell) lines, referred to here as T helper–killer or Th/c cells4–6. We recently found a novel serine esterase that is present at greatly elevated levels in cloned murine Tc cell lines and one Th/c cell line, but not in two non-cytolytic Th cell lines7. These findings suggest that the serine esterase is involved in cytolytic activity and that a variety of effector cells share a common cytolytic mechanism. To explore the role of the serine esterase in this process, we have been studying additional properties of the enzyme in murine T cells. We show here that (1) it is a membrane-associated, disulphide-linked dimer, (2) it has trypsin-like properties but is not a general protease, (3) in density gradient centrifugation it sediments with perforin, (4) it is secreted by Tc cells during their cytolytic attack on target cells, and (5) antiserum to Tc-cell serine esterase reacts with the enzyme in Th/c cells.
DOI: 10.1073/pnas.82.24.8629
发表时间: 1985-12-01
影响因子: 11.1
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DOI: --
发表时间: 1985
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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DOI: --
发表时间: 1986
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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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