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Bone marrow mononuclear stem cells show no new gains in heart function says TIME study
Date:11/18/2013

between baseline and six months by 30% with a smaller reduction between six months and one year. The reduction in infarct size was accompanied by a similarly significant reduction in LV mass through one year. There were no differences in the reduction in infarct size and LV mass between the BMC and placebo groups at any time.

TIME, and a previous, related study (LateTIME), were carried out by the CCTRN, sponsored by the NIH's National Heart, Lung, and Blood Institute. Both used autologous bone marrow mononuclear cells in randomized treatment of patients at different intervals following a heart attack. Together, TIME and Late TIME have shown that stem cell therapy is safe, but both studies noted a lack of effectiveness delivered by BMC therapy on left-ventricular function.

TIME was developed to examine the role of timing of cell delivery post-STEMI and enrolled 120 patients (avg. age 57) between July 2008 and February 2011; the participants all had moderate to severe reduction of their left ventricular ejection fraction (37%) and had undergone coronary stent placement as treatment for their heart attack. The participants were randomly assigned to stem cell delivery or placebo at three or seven days following their heart attack. Researchers utilized an automated method of processing and purifying the stem cells from the bone marrow of each volunteer to ensure that everyone received a uniform dose (150 million stem cells).


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Contact: Steve Goodyear
sgoodyear@mhif.org
612-863-1654
Minneapolis Heart Institute Foundation
Source:Eurekalert

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