Format

Send to

Choose Destination
See comment in PubMed Commons below
Biol Blood Marrow Transplant. 2012 May;18(5):683-9. doi: 10.1016/j.bbmt.2012.01.006. Epub 2012 Jan 25.

Rapid thymic reconstitution following bone marrow transplantation in neonatal mice is VEGF-dependent.

Author information

1
Department of Pathology and Laboratory Medicine, University of California Los Angeles, Los Angeles, California, USA.

Abstract

Age-related differences in thymic function influence the rapidity of T cell reconstitution following hematopoietic stem cell transplantation (HSCT). In adults, thymic reconstitution is delayed until after marrow engraftment is established, and is significantly improved by approaches that increase marrow chimerism, such as pretransplantation irradiation. In contrast, we show that neonatal mice undergo more rapid and efficient thymic reconstitution than adults, even when bone marrow (BM) engraftment is minimal and in the absence of pretransplantation radiation. We have previously shown that the neonatal thymus produces high levels of vascular endothelial growth factor (VEGF) that drives angiogenesis locally. In this report, we show that inhibition of VEGF prior to HSCT prevents rapid thymic reconstitution in neonates, but has no effect on thymic reconstitution in adults. These data suggest that the early radiation-independent thymic reconstitution unique to the neonatal host is mediated through VEGF, and reveals a novel pathway that might be targeted to improve immune reconstitution post-HSCT.

PMID:
22281302
PMCID:
PMC3334422
DOI:
10.1016/j.bbmt.2012.01.006
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments

    Supplemental Content

    Full text links

    Icon for Elsevier Science Icon for PubMed Central
    Loading ...
    Support Center