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

Infectious Diseases

Journal of AIDS & Clinical Research

Author(s): Fridman R, Lider O, Naparstek Y, Fuks Z, Vlodavsky I, , Fridman R, Lider O, Naparstek Y, Fuks Z, Vlodavsky I,

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Abstract 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 independent 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. This article was published in J Cell Physiol and referenced in Journal of AIDS & Clinical Research

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