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SH3RF2 functions as an oncogene by mediating PAK4 protein stability

Tae Woo Kim1, Yun Kyung Kang, Zee Yong Park

  • 1Medical Genomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea.

Carcinogenesis
|October 17, 2013
PubMed

Insights

SH3RF2 is an oncogene overexpressed in cancers, promoting cell survival by stabilizing PAK4. Inhibiting SH3RF2 may offer a new therapeutic strategy for cancer treatment.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • SH3RF proteins are involved in cell survival and apoptosis.
  • SH3RF2 is identified as a potential oncogene.

Purpose of the Study:

  • To investigate the role of SH3RF2 in human cancers.
  • To elucidate the mechanism by which SH3RF2 regulates protein stability and cell signaling.

Main Methods:

  • Immunohistochemical analysis of 159 colon cancer tissues.
  • Investigation of SH3RF2's effect on PAK4 protein stability and ubiquitination.
  • Analysis of downstream signaling pathways, including TNF-α, TRADD, NF-κB, and caspase-8.
  • In vivo and in vitro experiments assessing cell migration, apoptosis, and tumor growth.

Main Results:

  • SH3RF2 is overexpressed in colon cancer tissues and correlates with poor prognosis.
  • SH3RF2 inhibits PAK4 ubiquitination and degradation, leading to PAK4 upregulation.
  • SH3RF2 ablation affects TNF-α signaling, inhibiting NF-κB and enhancing caspase-8 activity.
  • Ectopic SH3RF2 expression promotes cancer cell survival, migration, colony formation, and tumor growth.

Conclusions:

  • SH3RF2 functions as an oncogene by regulating PAK4 stability.
  • SH3RF2 plays a significant role in cancer progression and survival.
  • SH3RF2 represents a potential therapeutic target for cancer treatment.

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