Serine esterase in cytolytic T lymphocytes
Serine esterase in cytolytic T lymphocytes
复制标题
溶细胞 T 淋巴细胞中的丝氨酸酯酶
作者:
M. Pasternack;M. Pasternack;C. Verret;Margaret A. Liu;Margaret A. Liu;H. Eisen
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.
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DOI:
10.1073/pnas.82.24.8629
发表时间:
1985-12-01
影响因子:
11.1
作者:
PODACK, ER;YOUNG, JDE;COHN, ZA
通讯作者:
COHN, ZA
DOI:
--
发表时间:
1985
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Tite,JP;Powell,MB;Ruddle,NH
通讯作者:
Ruddle,NH
DOI:
--
发表时间:
1985
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Klein,JR;Pasternack,MS;Bevan,MJ
通讯作者:
Bevan,MJ
DOI:
--
发表时间:
1986
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
作者:
Nakamura,M;Ross,DT;Briner,TJ;Gefter,ML
通讯作者:
Gefter,ML
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