North America

NEW YORK - Osiris Therapeutics Inc.

DETROIT - The University of Michigan has received 13 federal stimulus grants worth $6.8 million for stem cell research - a sign of the state's growing clout since voters last year eased restrictions in the emerging field that seeks treatments and cures for numerous diseases.

WASHINGTON - Scientists have grown a piece of heart muscle - and then watched it beat - by using stem cells from a mouse embryo, a big step toward one day repairing damage from heart attacks.

ANN ARBOR, Mich. - Aastrom Biosciences Inc., which develops stem cell therapies, said Wednesday it received a notice saying it might be subject to delisting from the Nasdaq.