Potential of tyrosine kinase receptor TIE-1 as novel therapeutic target in high-PI3K-expressing ovarian cancer

Xuewei Zhang, Masumi Ishibashi, Kazuyuki Kitatani, Shogo Shigeta, Hideki Tokunaga, Masafumi Toyoshima, Muneaki Shimada, Nobuo Yaegashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Tyrosine kinase receptor TIE-1 plays a critical role in angiogenesis and blood-vessel stability. In recent years, increased TIE-1 expression has been observed in many types of cancers; however, the biological significance and underlying mechanisms remain unknown. Thus, in the present study, we investigated the tumor biological functions of TIE-1 in ovarian cancer. The treatment of SKOV3 ovarian-cancer cells with siRNA against TIE-1 decreased the expression of key molecules in the PI3K/Akt signaling pathway, such as p110α and phospho-Akt, suggesting that TIE-1 is related to the PI3K/Akt pathway. Furthermore, the knockdown of TIE-1 significantly decreased cell proliferation in high-PI3K-expressing cell lines (SKOV3, CAOV3) but not low-PI3K-expressing cell lines (TOV112D, A2780). These results suggested that inhibition of TIE-1 decreases cell growth in high-PI3K-expressing cells. Moreover, in low-PI3K-expressing TOV112D ovarian-cancer cells, TIE-1 overexpression induced PI3K upregulation and promoted a PI3K-mediated cell proliferative phenotype. Mechanistically, TIE-1 participates in cell growth and proliferation by regulating the PI3K/Akt signaling pathway. Taken together, our findings strongly implicate TIE-1 as a novel therapeutic target in high-PI3K-expressing ovarian-cancer cells.

Original languageEnglish
Article number1705
Pages (from-to)1-14
Number of pages14
Issue number6
Publication statusPublished - 2020 Jun


  • Molecular targeted therapy
  • Ovarian cancer
  • PI3K
  • TIE-1

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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