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Transplanted human umbilical cord blood cells improved heart function in rat model of MI
Date:3/6/2014

Putnam Valley, NY. (Mar. 6, 2014) When human umbilical cord blood cells were transplanted into rats that had undergone a simulated myocardial infarction (MI), researchers investigating the long term effects of the transplantation found that left ventricular (LV) heart function in the treated rats was improved over those that did not get the stem cells. The animals were maintained without immunosuppressive therapy.

The study will be published in a future issue of Cell Transplantation but is currently freely available on-line as an unedited early e-pub at: http://www.ingentaconnect.com/content/cog/ct/pre-prints/content-ct0860Chen.

"Myocardial infarction induced by coronary artery disease is one of the major causes of heart attack," said study co-author Dr. Jianyi Zhang of the University of Minnesota Health Science Center. "Because of the loss of viable myocardium after an MI, the heart works under elevated wall stress, which results in progressive myocardial hypertrophy and left ventricular dilation that leads to heart failure. We investigated the long term effects of stem cell therapy using human non-hematopoietic umbilical cord blood stem cells (nh-UCBCs). These cells have previously exhibited neuro-restorative effects in a rodent model of ischemic brain injury in terms of improved LV function and myocardial fiber structure, the three-dimensional architecture of which make the heart an efficient pump."

According to the authors, stem cell therapy for myocardial repair has been investigated extensively for the last decade, with researchers using a variety of different animal models, delivery modes, cells types and doses, all with varying levels of LV functional response. They also note that the underlying mechanisms for improvement are "poorly understood," and that the overall regeneration of muscle cells is "low."

To investigate the
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Contact: Robert Miranda
cogcomm@aol.com
Cell Transplantation Center of Excellence for Aging and Brain Repair
Source:Eurekalert

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