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Studying marrow, URMC researchers accelerate blood stem cells
Date:12/5/2012

ned by whether the body can remake adequate numbers of new hematopoietic stem cells by spurring them from their usual, quiet state.

Calvi's research discovered that early treatment with PGE2 not only accelerated blood cell recovery, but protected the surrounding microenvironment to stimulate production of the newly transplanted cells. In fact, one of the most promising aspects of the research was the observed activity in the marrow microenvironment, she said.

Prostaglandin is a hormone normally produced in the body, and during radiation or chemotherapy the hormone rushes in to mediate the inflammatory response. Prostaglandin usually remains elevated for about six days. During this time, the bone marrow begins to recover slowly on its own. However, Calvi's research also showed that feeding the PGE2 drug compound to mice seemed to offer an additional benefit during this time, by changing the marrow's environment to make it more supportive of faster and better blood cell production.

In fact, early treatment with PGE2 expanded blood cells in several different ways: Not only did the drug increase proliferation of new, healthy blood cells, but it slowed the death of cells being rapidly killed off during the response to radiation injury.

"Having the ability to manipulate the function of hematopoietic stem cells in this context offers new and meaningful approaches for the clinic," Calvi said. "Patients face very serious consequences when the bone marrow doesn't make enough platelets and other blood cells, and few options are currently available to aid the recovery."
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Contact: Leslie Orr
Leslie_Orr@urmc.rochester.edu
University of Rochester Medical Center
Source:Eurekalert

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