B-cell recovery after stem cell transplantation of Artemis-deficient SCID requires elimination of autologous bone marrow precursor-B-cells
van der Burg, M.; Weemaes, C.M.R.; Preijers, F.; Brons, P.; Barendregt, B.H.; van Tol, M.J.D.; Hoogerbrugge, P.; van Dongen, J.J.M.
Haematologica 91(12): 1705-1709
2006
ISSN/ISBN: 0390-6078 PMID: 17145611 Document Number: 604244
Severe combined immunodeficiencies (SCID) are commonly fatal early in life. Adequate diagnosis and rapid institution of treatment, such as allogeneic stem cell transplantation (SCT), is essential. Several studies demonstrated that reconstitution of B-cell function after SCT is better in B-positive SCID than in B-negative SCID. We demonstrate that B-cell reconstitution in a B-negative SCID patient due to an Artemis mutation required the elimination of the autologous precursor-B-cells in bone marrow, probably to create physical space in the precursor-B-cell niches. Apparently, occupation of the precursor-B-cell niches is a potential dominant factor influencing repopulation of a functional B-cell compartment in B-negative SCID.