Abstract: A 5H-Thiazolo[3,2]pyrimidine derivative or a salt thereof for use as a medicine, which is represented by the following formula (A): wherein R represents an optionally substituted phenyl or pyridyl group; R4 represents a hydroxyl group, an amino group, a straight chain or branched alkoxy group, a straight chain or branched alkyl group, a cycloalkyloxy group, an alkylamino group, a cycloalkylamino group, a dialkylamino group, R5 represents a hydrogen atom, a straight chain or branched alkyl group, R6 and R7, which may be the same or different represent a hydrogen atom, a halogen atom, a straight chain or branched alkyl group, a straight chain or branched alkoxy group, a straight chain or branched alkenyl group, a cycloalkyl group, an aryl group, X, Y, and Z which may be same or different represent a hydrogen atom, a halogen atom, a carboxyl group a nitro group, a cyano group, an alkyl group, an alkoxy group or an acyl group.

Abstract: The invention discloses use of peptide containing an essential ventricular myosin light chain type 1 (vMLC1) amino acid sequence, which is functional as cleavage site for caspase-3, in the screening for a compound for the treatment of chronic or acute cardiovascular disease. Further, screening methods for inhibitors of the caspase-3-mediated cleavage of vMLC1 are disclosed.