Carcinogenesis, Vol 18, 1473-1476, Copyright © 1997 by Oxford University Press
D Ilic, S Kanazawa, H Nishizumi, S Aizawa, T Kuroki, S Mori and T Yamamoto
Focal adhesion kinase (FAK) is a novel non-receptor protein tyrosine kinase
implicated in transducing signals from cell surface receptors. Its
association with Fyn, a member of the Src family of tyrosine kinases, has
been observed in cell lines. To examine in vivo the interaction between
these two proteins, Fyn-deficient mice were bred with fak heterozygous
mutants (Fak deficiency is embryonic lethal). A majority of animals with
the double mutation (fyn-/- fak+/-) displayed a transient impairment in
thymocyte development at four weeks of age. However, all of them developed
skin abnormalities at the age of 8-12 months. The most prominent among
abnormalities was a greatly increased number and size of sebaceous glands.
Also, the epidermis was thickened and hyperkeratotic. These observations
would suggest involvement of Fyn and FAK in keratinocyte differentiation.
ARTICLES
Skin abnormality in aged fyn-/- fak+/- mice
Department of Oncology, Institute of Medical Science, The University of Tokyo, Japan.
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