Add time:08/03/2019         Source:sciencedirect.com

SR 31747 (cas 132173-07-0) is a sigma ligand which prevents the development of acute graft-versus-host reaction (GvHR) in hybrid B6D2F1 mice injected with C57BL/6 parental spleen cells. In the present study, we showed that this drug dramatically impaired the GvHR-associated increase in the numbers of both B-lymphocytes and polymorphonuclear cells (PMNs) in the spleen. Because SR 31747 blocked the GvHR-induced expression of both interleukin-2 and transferrin receptors on T-lymphocytes, it is very likely that this molecule prevented the disease through an inhibition of T-lymphocyte activation. Cytokine messenger RNA analyses on spleen cells revealed that SR 31747 blocked IFN-γ and GM-CSF but not IL-4 transcription. These effects, which are different from those observed with either cyclosporin-A or dexamethasone, strongly suggest that SR 31747 preferentially inhibits the Th1 lymphocyte subset.

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