Background: Severe T-cell lymphopenia of uncertain clinical significance has been observed in frequent apheresis platelet donors. Two commonly used plateletpheresis instruments are the Trima Accel, which uses a leukoreduction system (LRS) chamber to trap leukocytes and the Fenwal Amicus, which does not use an LRS chamber.
Study Design And Methods: We performed an international, multicenter, observational study comparing T-cell populations in frequent platelet donors collected exclusively using the Trima instrument (n = 131) or the Amicus instrument (n = 77). Age- and sex-matched whole blood donors (n = 126) served as controls.
Results: CD4 T-cell counts <200 cells/μL were found in 9.9% of frequent Trima (LRS+) platelet donors, 4.4% of frequent Amicus (LRS-) platelet donors, and 0 whole blood donors (p < .0001). CD4 T-cell counts <200 cells/μL were only seen in platelet donors with ≥200 lifetime donations. In multivariable analysis, age, lifetime donations, and instrument (Trima vs. Amicus) were independent risk factors for lymphopenia. In 40 Trima platelet donors, a plasma rinseback procedure was routinely performed following platelet collections. No Trima platelet donors receiving plasma rinseback had a CD4 T-cell count <200 cells/μL versus 13/91 Trima platelet donors not receiving plasma rinseback (p = .01).
Discussion: Recurrent bulk lymphocyte removal appears to contribute to the development of T-cell lymphopenia in frequent, long-term platelet donors. Lymphopenia is more common when an LRS chamber is used during platelet collection but can occur without an LRS chamber. Blood centers using LRS chambers can mitigate donor lymphopenia by performing plasma rinseback.
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http://dx.doi.org/10.1111/trf.17567 | DOI Listing |
Environ Toxicol Pharmacol
December 2024
Hematopoietic Stem Cell Transplantation Unit, Department of Pediatrics, Faculty of Medicine, Hacettepe University, Ankara, Turkey. Electronic address:
Phthalates and bisphenols, ubiquitous compounds found in various everyday products, have garnered attention due to their potential health-disrupting effects. This study aimed to (1) investigate urinary phthalate metabolites and bisphenol A (BPA) levels in donors and recipients prior to allogeneic hematopoietic stem cell transplantation (HSCT) and monitor changes in these compounds in pediatric recipients at different time points (Day-9, Day 0, Day+7, Day+28, Day+90), and (2) assess their association with engraftment success. Urine samples from pediatric recipients and donors were collected for analysis of phthalate metabolites and BPA in 34 donor-recipient pairs.
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Department of Hematology, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, China.
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View Article and Find Full Text PDFJ Funct Biomater
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