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Original Article |
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
chain cDNA resulted in conversion to high affinity binding. TSLP did not activate cells from IL-7R
-/- mice, but did activate cells from
c-/- mice. Thus, the functional TSLPR requires the IL-7R
chain, but not the
c chain for signaling.
Key Words: cytokine receptors, interleukin 2 receptor, interleukin 7 receptor, cytokine, DNA sequence
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