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RAB20 Promotes Proliferation via G2/M Phase through the Chk1/cdc25c/cdc2-cyclinB1 Pathway in Penile Squamous Cell

Xingliang Tan1,2,3, Gangjun Yuan4,5, Yanjun Wang1,2,3

  • 1Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou 510060, China.

Cancers
|March 10, 2022
PubMed

Insights

RAS oncogene family member RAB20 is overexpressed in penile squamous cell carcinoma (PSCC), promoting tumor growth and poor survival. Knockdown of RAB20 inhibited PSCC progression, suggesting it as a therapeutic target.

Area of Science:

  • Oncology
  • Genetics
  • Molecular Biology

Background:

  • RAS GTPase oncogene family member RAB20 is linked to poor outcomes in various cancers.
  • RAB20 overexpression promotes tumorigenesis and genomic instability.

Purpose of the Study:

  • To investigate the role of RAB20 in penile squamous cell carcinoma (PSCC).
  • To evaluate RAB20 as a prognostic biomarker and potential therapeutic target in PSCC.

Main Methods:

  • Comprehensive genomic sequencing of PSCC and normal tissues.
  • Quantitative PCR, Western blotting, and immunohistochemistry for RAB20 expression.
  • Clinical validation in a cohort of 259 PSCC patients.
  • In vitro and in vivo tumorigenesis assays.
  • Analysis of cell cycle regulation pathways.

Main Results:

  • RAB20 was significantly upregulated in PSCC tumors, particularly in metastatic lymph nodes.
  • High RAB20 expression correlated with advanced T, N, M status, extranodal extension, and clinical stage.
  • RAB20 served as an independent unfavorable prognostic indicator, associated with shorter survival.
  • RAB20 knockdown inhibited PSCC cell proliferation, migration, and tumor growth.
  • RAB20 depletion induced G2/M cell cycle arrest via the Chk1/cdc25c/cdc2-cyclinB1 pathway.

Conclusions:

  • RAB20 plays an oncogenic role in PSCC progression by promoting proliferation at the G2/M phase.
  • RAB20 is a promising prognostic biomarker for advanced PSCC with poor survival.
  • RAB20 represents a potential therapeutic target for PSCC treatment.
Keywords:
RAB20cell cyclecell proliferationpenile squamous cell carcinomaprognostic biomarker

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