The Journal of Experimental Medicine
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© The Rockefeller University Press, 0022-1007/1999/10/1183/ $5.00
The Journal of Experimental Medicine, Volume 190, Number 8, October 18, 1999 1183-1188

The Reduced Expression of 6Ckine in the plt Mouse Results from the Deletion of One of Two 6Ckine Genes

Galya Vassilevaa, Hortensia Sotoc, Albert Zlotnikc, Hideki Nakanod, Terutaka Kakiuchid, Joseph A. Hedrickb, and Sergio A. Liraa
a Department of Immunology, Schering-Plough Research Institute, Kenilworth, New Jersey 07033
b Human Genome Research, Schering-Plough Research Institute, Kenilworth, New Jersey 07033
c DNAX Research Institute for Cellular and Molecular Biology, Palo Alto, California 94304
d Department of Immunology, Toho University School of Medicine, Tokyo 143-8540, Japan

Correspondence to: Sergio A. Lira, Dept. of Immunology, Schering-Plough Research Institute, 2015 Galloping Hill Rd., Kenilworth, NJ 07033. Tel:908-740-3088 Fax:908-740-3084 E-mail:sergio.lira{at}spcorp.com.

6Ckine is an unusual chemokine capable of attracting naive T lymphocytes in vitro. It has been recently reported that lack of 6Ckine expression in lymphoid organs is a prominent characteristic of mice homozygous for the paucity of lymph node T cell (plt) mutation. These mice show reduced numbers of T cells in lymph nodes, Peyer's patches, and the white pulp of the spleen. The genetic reason for the lack of 6Ckine expression in the plt mouse, however, has remained unknown. Here we demonstrate that mouse 6Ckine is encoded by two genes, one of which is expressed in lymphoid organs and is deleted in plt mice. A second 6Ckine gene is intact and expressed in the plt mouse.

Key Words: chemokines, cell trafficking, leukocyte chemotaxis, T lymphocytes, mutation


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