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IL-13/IL-13Rα2 axis promotes proliferation of angiosarcoma cells.

Hinako Saito1, Jason Yongsheng Chan2, Issei Omori1

  • 1Department of Dermatology, Graduate School of Medicine, The University of Tokyo, 7-3-1, Hongo, Bunkyo-Ku, Tokyo, 113-8655, Japan.

Scientific Reports
|August 25, 2025
PubMed
Summary

The interleukin-13 (IL-13) and its receptor IL-13Rα2 axis promotes angiosarcoma growth. Targeting this IL-13/IL-13Rα2 pathway may offer new therapeutic strategies for angiosarcoma.

Keywords:
AngiosarcomaCell proliferationCytokine signalingIL-13 receptor alpha2Interleukin-13STAT6

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Angiosarcoma is an aggressive soft tissue sarcoma with poor prognosis.
  • The role of the interleukin-13 (IL-13) pathway in angiosarcoma is not well understood.

Purpose of the Study:

  • To investigate the role of the IL-13/IL-13 receptor α2 (IL-13Rα2) axis in angiosarcoma pathogenesis.
  • To explore the IL-13/IL-13Rα2 axis as a potential therapeutic target for angiosarcoma.

Main Methods:

  • Reanalysis of angiosarcoma transcriptomic data.
  • Immunohistochemistry on patient samples and cell lines.
  • In vitro functional studies using angiosarcoma cell lines (MO-LAS-B).
  • siRNA-mediated knockdown and neutralizing antibodies.
  • STAT6 inhibitor treatment.

Main Results:

  • Elevated IL13RA2 mRNA in angiosarcoma tissues.
  • High IL-13Rα2 expression in angiosarcoma cell lines and patient samples.
  • IL-13 promotes angiosarcoma cell proliferation via IL-13Rα2.
  • IL-13 stimulation upregulates IL13RA2 and VEGFA, indicating a positive feedback loop.
  • STAT6 pathway is involved in the IL-13/IL-13Rα2 signaling.

Conclusions:

  • The IL-13/IL-13Rα2 axis plays a significant role in angiosarcoma progression.
  • Targeting the IL-13/IL-13Rα2 pathway presents a promising therapeutic strategy for angiosarcoma.