iScience (Jan 2025)

Penfluridol targets septin7 to suppress endometrial cancer by septin7-Orai/IP3R-Ca2+-PIK3CA pathway

  • Lingyi Song,
  • Huiwen Wu,
  • Xiao Sun,
  • Xiaohu Liu,
  • Xianwu Ling,
  • Wei Ni,
  • Lijuan Li,
  • Beibei Liu,
  • Jinlian Wei,
  • Xiaokang Li,
  • Jian Li,
  • Yudong Wang,
  • Fei Mao

Journal volume & issue
Vol. 28, no. 1
p. 111640

Abstract

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Summary: Phenotypic screening of existing drugs is a good strategy to discover new drugs. Herein, 33 psychotherapeutic drugs in our drug library were screened by phenotypic screening and penfluridol (PFD) was found to exhibit excellent anti-endometrial cancer (EC) activity both in vitro and in vivo. Furthermore, the molecular target of PFD was identified as septin7, a tumor suppressor in EC. In septin7-deficient EC cells and xenograft mouse models, PFD exhibited weaker anti-cancer properties, indicating that septin7 was essential for the tumor inhibitory activity. Notably, PFD could induce cell apoptosis by regulating the septin7-Orai/IP3R-Ca2+-PIK3CA pathway. In addition, PFD attenuates the interaction of septin7-tubulin, thereby inhibiting microtubule polymerization. In summary, this study revealed a target and mechanistic insights into EC therapeutic strategies and identified a potential candidate agent for the treatment of EC.

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