An anti-CD9 monoclonal antibody promotes adhesion and induces proliferation of Schwann cells in vitro - PubMed (original) (raw)
An anti-CD9 monoclonal antibody promotes adhesion and induces proliferation of Schwann cells in vitro
M Hadjiargyrou et al. J Neurosci. 1995 Jan.
Abstract
We have recently found that CD9, a cell surface glycoprotein involved in intercellular signaling in hematopoietic cells, is also expressed by neurons and glia in the peripheral nervous system. Antibody perturbation experiments were conducted to examine the function of CD9 in neural cells. Three anti-CD9 monoclonal antibodies (mAbs) (ROCA1, ROCA2, B2C11) were tested for their ability to promote adhesion of several Schwann cell lines (S-16, RN22, JS1), primary Schwann cells and PC12 cells. Only B2C11 promotes adhesion in all cells tested. Although ROCA2 immunolabels living cells strongly, it had no effect on the adhesion of any of these cells. In addition, ROCA1 and several positive-staining, control mAbs also had no effect. Another mAb, 192-IgG, directed against the low affinity NGF receptor, also promotes the adhesion of S-16, PC12, and primary Schwann cells. In addition to adhesion, contact of S-16 Schwann cells with B2C11 specifically induces morphological changes and robust proliferation. None of the other mAbs, including 192-IgG, induce proliferation of S-16 cells. These results provide evidence that CD9 may be involved in signaling, activation and growth regulation of cells in the nervous system.
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