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Signalling pathways in endometrial cancer.

Anna Markowska1, Monika Pawałowska2, Jolanta Lubin2

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Signaling pathway dysregulation, including Wnt/β-catenin and PI3K/Akt, drives endometrial cancer (EC) by disrupting cell cycle control and apoptosis. Targeting these pathways offers potential for novel EC therapies.

Keywords:
Akt/PI3k pathwayWnt/β-cateninendometrial cancerp16p53signalling pathways

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Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Signaling

Background:

  • Carcinogenesis involves disrupted cell cycle regulation, apoptosis inhibition, and enhanced proliferation.
  • Wnt/β-catenin and PI3K/Akt signaling pathways are critically implicated in endometrial cancers (EC), particularly type I.
  • Mutations in key genes like APC, CTNBB1, PTEN, PIK3CA, Akt, TP53, and P16 contribute to EC development.

Purpose of the Study:

  • To elucidate the complex roles of signaling pathways in endometrial carcinogenesis.
  • To identify key molecular alterations driving EC development and progression.
  • To provide a foundation for developing targeted therapeutic strategies for EC.

Main Methods:

  • Review and analysis of signaling pathway dysregulation in EC.
  • Identification of common mutations in genes regulating Wnt/β-catenin and PI3K/Akt pathways.
  • Examination of TP53 and P16 gene alterations in non-endometrioid EC subtypes.

Main Results:

  • Overactivation of Wnt/β-catenin due to mutations in APC, axin, or CTNBB1 promotes excessive gene expression.
  • PI3K/Akt pathway hyperactivity, driven by PTEN inactivation or PIK3CA/Akt mutations, inhibits apoptosis and enhances cell division.
  • TP53 mutations are crucial in non-endometrioid ECs for DNA repair and apoptosis, while P16 gene irregularities affect cell cycle control.

Conclusions:

  • Understanding protein interactions within Wnt/β-catenin and PI3K/Akt pathways is vital for EC targeted therapy.
  • Specific genetic mutations significantly contribute to the pathogenesis of different EC subtypes.
  • Targeting these aberrant signaling cascades holds promise for future EC treatment strategies.