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Cloning of a receptor subunit required for signaling by thymic stromal lymphopoietin

A Pandey1, K Ozaki, H Baumann

  • 1Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.

Nature Immunology
|March 23, 2001
PubMed

Insights

Researchers identified the thymic stromal lymphopoietin receptor (TSLPR) and found it works with the IL-7 receptor alpha chain (IL-7Rα) to mediate TSLP signaling, impacting lymphoid development.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Signaling

Background:

  • Type I cytokine signaling relies on receptor complex formation.
  • The common cytokine receptor gamma chain (γc) is a key component in many cytokine receptors.

Purpose of the Study:

  • To clone and characterize a novel type I cytokine receptor subunit.
  • To identify the receptor for thymic stromal lymphopoietin (TSLP).
  • To elucidate the role of the IL-7 receptor alpha chain (IL-7Rα) in TSLP signaling.

Main Methods:

  • Cloning of a novel type I cytokine receptor subunit.
  • Binding and crosslinking experiments to identify TSLP receptor.
  • Cell proliferation assays using IL-7Rα-expressing cells.
  • Reporter gene assays to assess STAT5 activation.

Main Results:

  • Cloned a TSLP receptor subunit (TSLPR), related to γc.
  • TSLPR binds TSLP, with binding enhanced by IL-7Rα.
  • IL-7Rα and TSLPR are required for TSLP-induced cell proliferation and STAT5 activation.
  • IL-7Rα is a shared component of both IL-7 and TSLP receptors.

Conclusions:

  • IL-7Rα is a crucial component of both IL-7 and TSLP receptor complexes.
  • The shared use of IL-7Rα explains the severe lymphoid defects observed in IL-7Rα gene deletions.
  • Cloning TSLPR provides a basis for understanding TSLP function and signaling pathways.

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