Molecular Immunology 1992-Sep
New cyclosporin A analogue: synthesis and immunosuppressive activity.
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A synthetic analogue of cyclosporine A, in which an unusual amino acid (4R)-N-methyl-4-butenyl-4-methyl-L-threonine (MeBmt) is replaced with L-threonine (Thr), was synthesized by the solid phase method. Its activity in the humoral response to sheep red blood cells in vitro and in vivo in mice was practically the same as that of cyclosporine A used as a standard, whereas the analogue studied exerted a significantly stronger effect in the delayed type hypersensitivity to sheep red blood cells in mice.