Abstract:
BACKGROUND:The NOD/SCID mouse is a widely used model for human cord blood (CB) transplantation. Engraftment is generally estimated with semiquantitative methods, measuring the percentage of human cells among mouse cells. To compare protocols aiming to improve hematopoietic recovery, quantitative methods to enumerate human cells would be preferred. This study describes a single-platform protocol to count human platelets (hPLTs) after transfusion and CB transplantation in the peripheral blood (PB) of the mouse. METHODS:With an anti-human CD41 antibody against hPLTs and counting beads, the sensitivity to detect hPLTs in mouse blood by flow cytometry was validated. PLT recovery after hPLT transfusions and PLT kinetics after transplantation with CB CD34+ cells was followed in time in NOD/SCID mice. RESULTS:hPLTs could be reliably detected to a level as low as 1 PLT per microL with this single-platform protocol, what appeared to be at least 10 times more sensitive than detection with the dual-platform protocol. To verify the applicability for mouse studies, hPLTs were measured serially in transfusion and transplantation studies in NOD/SCID mice. The results showed that earlier detection of PLT recovery was feasible with the single-platform protocol. CONCLUSION:A single-platform flow cytometry method can repeatedly measure low numbers of circulating hPLTs in the PB of the same mouse. This method may be helpful in search of new protocols aiming at accelerating PLT recovery after CB transplantation, but also in a number of clinical settings, such as monitoring PLT reconstitution after hematopoietic stem cell transplantation.
journal_name
Transfusionjournal_title
Transfusionauthors
Schipper LF,van Hensbergen Y,Fibbe WE,Brand Adoi
10.1111/j.1537-2995.2007.01472.xsubject
Has Abstractpub_date
2007-12-01 00:00:00pages
2305-14issue
12eissn
0041-1132issn
1537-2995pii
TRF01472journal_volume
47pub_type
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