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Specific blood-derived cells promote survival in heart attack model
Date:6/16/2010

Tampa, Fla. (June 16, 2010) A research team from McGill University (Canada) report a beneficial effect on cardiac function in mouse models when implanted monocytes - a type of white blood cell that is part of the immune system - helped preserve cardiac function following a heart attack (myocardial infarction).

Their study, published in the current issue of Cell Transplantation (19:4), is now freely available on-line at http://www.ingentaconnect.com/content/cog/ct/.

With heart failure a leading cause of morbidity and mortality, improving post-myocardial infarction therapies through natural adaptive responses, such as finding ways to boost and use the immune system, is an important area of research.

Monocytes, produced in the bone marrow, circulate in the bloodstream for a few days before moving to tissues throughout the body and play a role in attacking foreign substances in the body, including infection.

New blood vessel growth (angiogenesis) could play an important role in the repair of damaged heart tissue. The researchers therefore chose to grow (culture) monocytes, derived from mouse blood, under angiogenic conditions prior to transplantation to determine if these so-called monocyte derivatives could be beneficial.

"Our purpose was to assess the effect of monocyte derivatives (MDs) on cardiac and endothelial cell proliferation and survival," said the study's lead author Dr. Jacques Galipeau, associate professor of medicine at McGill University's Lady Davis Institute for Medical Research. "In this study, we demonstrated that myocardial protection following infarction can be induced in part by growth factors released by MDs. This finding strongly suggests that these released proteins reduce cardiac cell apoptosis and enhance endothelial cell proliferation in vitro, and reduce fibrosis in vivo."

The McGill researchers found that when
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Contact: David Eve
celltransplantation@gmail.com
Cell Transplantation Center of Excellence for Aging and Brain Repair
Source:Eurekalert

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