|
||
Original Article |
Correspondence to: Pandelakis A. Koni, Rm. CA2007, Institute of Molecular Medicine and Genetics, Medical College of Georgia, 1120 15 St., Augusta, GA 30912. Tel:706-721-6897 Fax:706-721-7959 E-mail:lak{at}immag.mcg.edu.
We generated vascular cell adhesion molecule (VCAM)-1 "knock-in" mice and Cre recombinase transgenic mice to delete the VCAM-1 gene (vcam-1) in whole mice, thereby overcoming the embryonic lethality seen with conventional vcam-1deficient mice. vcam-1 knock-in mice expressed normal levels of VCAM-1 but showed loss of VCAM-1 on endothelial and hematopoietic cells when interbred with a "TIE2Cre" transgene. Analysis of peripheral blood from conditional vcam-1deficient mice revealed mild leukocytosis, including elevated immature B cell numbers. Conversely, the bone marrow (BM) had reduced immature B cell numbers, but normal numbers of pro-B cells. vcam-1deficient mice also had reduced mature IgD+ B and T cells in BM and a greatly reduced capacity to support short-term migration of transferred B cells, CD4+ T cells, CD8+ T cells, and preactivated CD4+ T cells to the BM. Thus, we report an until now unappreciated dominant role for VCAM-1 in lymphocyte homing to BM.
Key Words: VCAM-1, Cre recombinase, knockout mice, bone marrow, lymphocyte migration
This article has been cited by other articles:
| TABLE OF CONTENTS |
|