Abstract:
BACKGROUND:It is important to develop new immunosuppressive agents without clinical drawbacks. In this article, we reveal the possibility of a chemically synthetic sulfonolipid that acts as a novel immunosuppressive drug. METHODS:We evaluated the immunosuppressive effect of 3-O-(6-deoxy-6-sulfono-beta-D-glucopyranosyl)-1,2-di-O-acylglycerol (beta-SQDG) that contains a saturated C18 fatty acid, which is designated as beta-SQDG(18:0) by mixed lymphocyte reaction (MLR) and rat allogeneic skin graft. Then, we investigated the mechanism of immunosuppressive effect of beta-SQDG(18:0). RESULTS:beta-SQDG(18:0) inhibited human MLR in a dose-dependent manner without overt cytotoxic effect and prolonged rat skin allograft rejection in vivo. beta-SQDG(18:0) did not inhibit the direct activation of responder T. This reagent could not affect the expression of either major histocompatibility antigen complex (MHC) class I or class II molecules on the cell surface of the stimulator cells, antigen-presenting cells. In contrast, beta-SQDG(18:0) was demonstrated to inhibit the binding among allogeneic lymphocytes. However, the expression of known cell surface accessory and adhesion molecules, such as CD4, CD28, leukocyte function-associated antigen 1, intercellular adhesion molecule 1, and CTLA-4, was not affected by beta-SQDG(18:0) treatment. CONCLUSIONS:beta-SQDG(18:0) might be a new class of the immunosuppressive reagent, and the inhibition of responder T-lymphocyte activation in MLR by beta-SQDG(18:0) may be responsible for certain three-dimensional structures of this reagent or its quinovose binding to sulfonic acid.
journal_name
Transplantationjournal_title
Transplantationauthors
Matsumoto Y,Sahara H,Fujita T,Shimozawa K,Takenouchi M,Torigoe T,Hanashima S,Yamazaki T,Takahashi S,Sugawara F,Mizushina Y,Ohta K,Takahashi N,Gasa S,Jimbow K,Sakaguchi K,Sato Ndoi
10.1097/00007890-200207270-00018subject
Has Abstractpub_date
2002-07-27 00:00:00pages
261-7issue
2eissn
0041-1337issn
1534-6080journal_volume
74pub_type
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