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IL13Rα2 Is Involved in the Progress of Renal Cell Carcinoma through the JAK2/FOXO3 Pathway

Mi-Ae Kang1, Jongsung Lee2, Chang Min Lee3

  • 1Department of Biological Science, Gachon University, Seongnam 13120, Korea.

Journal of Personalized Medicine
|April 30, 2021
PubMed

Insights

Interleukin-13 receptor alpha 2 (IL13Rα2) promotes renal cell carcinoma (RCC) progression by activating the JAK2/FOXO3 pathway. Targeting IL13Rα2 with drugs like telmisartan may offer new therapeutic options for RCC patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Pharmacology

Background:

  • Previous research linked IL4Rα/IL13Rα1 complex to poor renal cell carcinoma (RCC) outcomes.
  • IL13Rα2 functions as an independent receptor for IL13, suggesting a distinct role in RCC pathogenesis.

Purpose of the Study:

  • To investigate the clinicopathological significance and oncogenic role of IL13Rα2 in 229 RCC patients.
  • To elucidate the molecular mechanisms underlying IL13Rα2's function in RCC progression.
  • To identify potential therapeutic strategies targeting the IL13Rα2 pathway.

Main Methods:

  • Univariate and multivariate analyses of IL13Rα2 expression in relation to relapse-free survival.
  • In vitro assays (siRNA knockdown) in four RCC cell lines (A498, ACHN, Caki1, Caki2) to assess proliferation, cell cycle, and apoptosis.
  • Western blot analysis to evaluate protein expression and phosphorylation (JAK2, FOXO3) and protein interactions.
  • Screening of FDA-approved drugs for potential JAK2 inhibitors, focusing on telmisartan.

Main Results:

  • High IL13Rα2 expression correlated with poorer relapse-free survival in RCC.
  • IL13Rα2 knockdown suppressed proliferation and induced apoptosis in RCC cell lines.
  • Knockdown of IL13Rα2 decreased JAK2 phosphorylation, increased FOXO3 expression, and disrupted IL13Rα2/JAK2/FOXO3 interactions.
  • Telmisartan, a JAK2 inhibitor, reduced RCC cell proliferation and induced apoptosis by decreasing JAK2 phosphorylation and increasing FOXO3 expression.

Conclusions:

  • IL13Rα2 drives RCC progression through the JAK2/FOXO3 signaling pathway.
  • IL13Rα2 represents a potential therapeutic target for renal cell carcinoma.
  • Telmisartan demonstrates potential as a novel therapeutic agent for RCC by targeting this pathway.
Keywords:
FOXO3IL13Rα2JAK2renal cell carcinomatelmisartan

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