Soluble antigen induces T lymphocytes to secrete an endoglycosidase that degrades the heparan sulfate moiety of subendothelial extracellular matrix

Soluble antigen induces T lymphocytes to secrete an endoglycosidase that degrades the heparan sulfate moiety of subendothelial extracellular matrix
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可溶性抗原诱导 T 淋巴细胞分泌糖苷内切酶,降解内皮下细胞外基质的硫酸乙酰肝素部分

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发表时间:
1987
影响因子:
5.6
通讯作者:
I. Cohen
I. Cohen
中科院分区:
生物学2区
文献类型:
--
作者:
R. Fridman;O. Lider;Y. Naparstek;Z. Fuks;I. Vlodavsky;I. Cohen

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在对髓鞘碱性蛋白(BP)具有反应性的大鼠T淋巴细胞系中研究了抗原介导的乙酰肝素酶诱导,乙酰肝素酶是一种能够降解内皮下细胞外基质(ECM)中硫酸乙酰肝素的糖苷内切酶。我们发现,暴露于可溶性而非ECM结合BP后,未活化的T淋巴细胞可被诱导表达乙酰肝素酶活性。乙酰肝素酶的诱导是免疫特异性的,并且与同基因或异基因抗原呈递细胞(APC)的存在无关。然而,抗IA抗体抑制乙酰肝素酶表达。可溶性BP诱导分泌乙酰肝素酶到培养基中的分钟内,尽管蛋白质合成的抑制。T淋巴细胞裂解液中含有乙酰肝素酶活性。因此,T淋巴细胞在暴露于特异性抗原后分泌预先形成的乙酰肝素酶。
The antigen‐mediated induction of heparanase, an endoglycosidase capable of degrading heparan sulfate from the subendothelial extracellular matrix (ECM), was investigated in a rat T lymphocyte cell line reactive against the basic protein (BP) of myelin. We found that nonactivated T lymphocytes could be induced to express heparanase activity following exposure to soluble but not to ECM‐bound BP. The induction of heparanase was immunologically specific and indpendent of the presence of syngeneic or allogeneic antigen presenting cells (APC). However, anti‐IA antibodies inhibited heparanase expression. Soluble BP induced secretion of heparanase into the culture medium within minutes, despite inhibition of protein synthesis. Cell lysates of T lymphocytes contained heparanase activity. Thus, T lymphocytes secrete a preformed heparanase following exposure to specific antigen.
DOI: 10.1172/jci112104
发表时间: 1985-10
期刊: The Journal of clinical investigation
影响因子: --
作者:
Y. Matzner;M. Bar‐Ner;J. Yahalom;R. Ishai‐Michaeli;Z. Fuks;I. Vlodavsky
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发表时间: 1983
期刊: The New England journal of medicine
影响因子: --
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