CLEVELAND, July 28, 2010 (GLOBE NEWSWIRE) -- Athersys, Inc. (Nasdaq:ATHX) announced today positive results from its phase I clinical trial of MultiStem®, its allogeneic cell therapy product, administered to individuals following acute myocardial infarction (AMI), more commonly referred to as a heart attack. The study results, based on four months of post-treatment patient data, demonstrate that MultiStem was well tolerated at all dose levels and also suggest improvement in heart function in treated patients.