The Journal of Experimental Medicine
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Published online 28 August 2000.
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© The Rockefeller University Press, 0022-1007/2000/9/659/ $5.00
The Journal of Experimental Medicine, Volume 192, Number 5, September 5, 2000 659-670


Original Article

Cloning of the Murine Thymic Stromal Lymphopoietin (TSLP) Receptor: Formation of a Functional Heteromeric Complex Requires Interleukin 7 Receptor

Linda S. Parka, Unja Martina, Kirsten Garkaa, Brian Gliniaka, James P. Di Santob, Werner Mullerc, David A. Largaespadad, Neal G. Copelandd, Nancy A. Jenkinsd, Andrew G. Farre, Steven F. Zieglerf, Philip J. Morrisseya, Raymond Paxtona, and John E. Simsa
a Department of Biochemistry, Department of Biological Sciences, and the Department of Molecular Biology, Immunex Corporation, Seattle, Washington 98101
b Departement d'Immunologie, Institut Pasteur, 75724 Paris, France
c Institute for Genetics, Cologne D-50931, Germany
d Mammalian Genetics Laboratory, ABL-Basic Research Program National Cancer Institute–Frederick Cancer Research and Development Center, Frederick, Maryland 21702
e Department of Biological Structure, University of Washington, Seattle, Washington 98195
f Virginia Mason Research Center, Seattle, Washington 98101

Correspondence to: John E. Sims, Immunex Corporation, 51 University St., Seattle, WA 98101. Tel:206-587-0430 Fax:206-233-9733 E-mail:sims{at}immunex.com.

The cellular receptor for murine thymic stromal lymphopoietin (TSLP) was detected in a variety of murine, but not human myelomonocytic cell lines by radioligand binding. cDNA clones encoding the receptor were isolated from a murine T helper cell cDNA library. TSLP receptor (TSLPR) is a member of the hematopoietin receptor family. Transfection of TSLPR cDNA resulted in only low affinity binding. Cotransfection of the interleukin 7 (IL-7)R{alpha} chain cDNA resulted in conversion to high affinity binding. TSLP did not activate cells from IL-7R{alpha}-/- mice, but did activate cells from {gamma}c-/- mice. Thus, the functional TSLPR requires the IL-7R{alpha} chain, but not the {gamma}c chain for signaling.

Key Words: cytokine receptors, interleukin 2 receptor, interleukin 7 receptor, cytokine, DNA sequence


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