VCAM-1 Ablation in Nonhematopoietic Cells in MxCre+ VCAM-1f/f Mice is Variable and Dictates Their Phenotype

Overview

Journal Exp Hematol

Specialty Hematology

Date 2007 Mar 24

PMID 17379066

Citations 16

Authors

Tatiana Ulyanova

Gregory V Priestley

Betty Nakamoto

Yi Jiang

Thalia Papayannopoulou

Affiliations

Soon will be listed here.

Abstract

Objective: The goal of the present study was to assess the extent of vascular cell adhesion molecule-1 (VCAM-1) gene deletion in hematopoietic vs nonhematopoietic cells in the bone marrow (BM) of MxCre(+)VCAM-1(f/f) mice and its impact on the phenotypic features of these mice.

Methods: VCAM-1 ablation was evaluated at the genomic level by polymerase chain reaction (PCR), at the mRNA level by real-time PCR, and at the protein level by fluorescein-activated cell sorting and immunohistochemistry. The homing or mobilization of colony-forming unit cultures was assessed by standard assays.

Results: A previously accepted interferon-induction scheme yielded efficient VCAM-1 ablation in hematopoietic cells but variable ablation in BM fibroblasts and endothelial cells. The level of ablation in the latter populations correlated with alterations in the hematopoietic phenotype.

Conclusions: Poly(I:C)-induced MxCre-mediated gene ablation is highly efficient in hematopoietic cells but variable and partial in nonhematopoietic cells in BM. Ablation of VCAM-1 in hematopoietic cells does not contribute to their mobilization, nor does it impair their homing. The latter is dependent on VCAM-1 ablation in nonhematopoietic cells of BM.

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