Characterization of Mice Lacking the Tetraspanin Superfamily Member CD151

Author:

Wright Mark D.1,Geary Sean M.2,Fitter Stephen3,Moseley Gregory W.1,Lau Lai-Man1,Sheng Kuo-Ching1,Apostolopoulos Vasso1,Stanley Edouard G.3,Jackson Denise E.1,Ashman Leonie K.2

Affiliation:

1. Austin Research Institute

2. School of Biomedical Sciences, University of Newcastle, and Hunter Medical Research Institute, Newcastle, and Institute of Medical and Veterinary Science, Adelaide, Australia

3. Institute of Reproduction and Development, Monash University, Melbourne

Abstract

ABSTRACT The tetraspanin membrane protein CD151 is a broadly expressed molecule noted for its strong molecular associations with integrins, especially α3β1, α6β1, α7β1, and α6β4. In vitro functional studies have pointed to a role for CD151 in cell-cell adhesion, cell migration, platelet aggregation, and angiogenesis. It has also been implicated in epithelial tumor progression and metastasis. Here we describe the generation and initial characterization of CD151-null mice. The mice are viable, healthy, and fertile and show normal Mendelian inheritance. They have essentially normal blood and bone marrow cell counts and grossly normal tissue morphology, including hemidesmosomes in skin, and expression of α3 and α6 integrins. However, the CD151-null mice do show phenotypes in several different tissue types. An absence of CD151 leads to a minor abnormality in hemostasis, with CD151-null mice showing longer average bleeding times, greater average blood loss, and an increased incidence of rebleeding occurrences. CD151-null keratinocytes migrate poorly in skin explant cultures. Finally, CD151-null T lymphocytes are hyperproliferative in response to in vitro mitogenic stimulation.

Publisher

American Society for Microbiology

Subject

Cell Biology,Molecular Biology

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