Because blood from the normal, healthy donors contained 1,200 to 155,000 sjTREC copies per milliliter of blood, the investigators chose 1,200 as the lowest end of the normal range for sjTRECs.
The team found that transplant recipients who had more than 1,200 copies of sjTREC in each milliliter of their blood before transplantation were more likely than patients with fewer copies to experience successful reconstitutions of their T cell populations. In patients with fewer than 1,200 copies per milliliter, the transplantation was likely either to fail or be significantly slow in reconstructing the T cell population.
"This is the first demonstration that high levels of sjTREC in a potential stem cell recipient can predict that their thymus will successfully reconstitute their T cell population using donated stem cells," said Xiaohua Chen, Ph.D., first author of the Blood article. "This kind of information should help physicians improve their ability to manage individual patients by predicting how they will respond to stem cell transplants."
Other authors of this study are Raymond Barfield, Ely Benaim, Wing Leung, James Knowles, Dawn Lawrence, Mario Otto, Sheila A. Shurtleff, Geoffrey A. M. Neale, Frederick G. Behm and Victoria Turner.
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This work was supported in part by the Assisi Foundation of Memphis and ALSAC.
St. Jude Children's Research Hospital
St. Jude Children's Research Hospital is internationally recognized for its pioneering work in finding cures and saving children with cancer and other catastrophic diseases. Founded by late entertainer Danny Thomas and based in Memphis, Tennessee, St. Jude freely shares its discoveries with scientific and medical communities around the world. No family ever pays for treatments not covered by insurance, and families without insurance are never asked to pay. St. Jude is financially supported by ALSAC, its fundraising organization. For more
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Source:St. Jude Children鈥檚 Research Hospital