Research Explores the Effects of Stem Cell Source and Patient Age on Stem Cell Transplantatio...(s were matched for four out of six allel...),Health

Date:12/7/2008

s were matched for four out of six alleles for each patient. For the cultured cord blood cells, two patients received a five-out-of-six allele match and four patients received a four-out-of-six allele match. There was an average CD34+ increase of 160 (range 41 to 382), meaning that for every one CD34+ cell, there were 160 CD34+ cells after the culture, with an average total nucleated cell fold increase of 660 (range 146 to 1496). A control group of 17 patients underwent an identical transplant regimen, but received two non-cultured cord blood units.

A relatively rapid engraftment time, averaging 14 days, was observed in the six patients in the experimental group compared with 25 days for the patients in the control group. The contribution of the expanded and non-cultured cord blood cells was determined by a DNA-based assay beginning seven days following the transplant. In the five patients with early engraftment, the engrafted cells present at day seven were derived almost entirely from the cultured unit. Persistent contribution to engraftment from the cultured cells was noted in two patients. One patient had persistent contribution from the cultured cells through 280 days post-transplant that was no longer noticeable at one year, and the second patient continued to demonstrate contribution from the cultured cells at 180 days post-transplant. One patient died on day 462 from a rare complication of myelitis (inflammation of the spinal cord) caused by the varicella-zoster virus, while all other patients were still in remission.

Non-Myeloablative Hematopoietic Stem Cell Transplantation in Older Patients With AML and MDS: Results From the Center for International Blood and Marrow Transplant Research (CIBMTR) [Abstract #346]

Sergio Giralt, MD, The University of TexasM. D. Anderson Cancer Center, Houston, TX

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SOURCE American Society of Hematology Copyright©2008 PR Newswire. All rights reserved

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