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Updated: Jan 31, 2026

Isolation of Cancer Stem Cells From Human Prostate Cancer Samples
07:16

Isolation of Cancer Stem Cells From Human Prostate Cancer Samples

Published on: March 14, 2014

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SPOP Promotes Nanog Destruction to Suppress Stem Cell Traits and Prostate Cancer Progression

Jinfang Zhang1, Ming Chen2, Yasheng Zhu3

  • 1Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.

Developmental Cell
|January 1, 2019
PubMed

Insights

SPOP suppresses prostate cancer (PrCa) by degrading Nanog, a key stem cell factor. Mutations disrupting this process promote PrCa progression, suggesting Pin1 inhibitors as a targeted therapy for wild-type SPOP PrCa.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Stem Cells

Background:

  • SPOP mutations are a hallmark of a specific prostate cancer (PrCa) subtype.
  • The tumor-suppressive role of SPOP in PrCa remains poorly understood.
  • Understanding SPOP's function is crucial for developing targeted PrCa therapies.

Purpose of the Study:

  • To elucidate the molecular mechanism by which SPOP suppresses stem cell traits in PrCa.
  • To investigate the interaction between SPOP and Nanog in the context of PrCa.
  • To identify potential therapeutic strategies targeting SPOP-mutated or wild-type PrCa.

Main Methods:

  • Investigated SPOP's role in regulating Nanog ubiquitination and degradation.
  • Analyzed the interaction between SPOP and Nanog using biochemical assays.
  • Examined the impact of SPOP and Nanog mutations on cancer stem cell traits and PrCa progression.
  • Identified Pin1 as an upstream regulator of Nanog stability.

Main Results:

  • SPOP suppresses stem cell traits by promoting Nanog poly-ubiquitination and degradation.
  • Nanog specifically interacts with SPOP via a degron motif, unlike Oct4, Sox2, and Klf4.
  • Cancer-associated mutations in SPOP or Nanog disrupt Nanog degradation, enhancing cancer stem cell traits and PrCa progression.
  • Pin1 stabilizes Nanog by hindering its recognition by SPOP.

Conclusions:

  • SPOP acts as a tumor suppressor in PrCa by controlling Nanog stability.
  • Disruption of the SPOP-Nanog interaction drives PrCa progression.
  • Pin1 inhibitors can promote Nanog degradation, offering a therapeutic avenue for PrCa patients with wild-type SPOP.
Keywords:
NanogPin1PrCaSPOPphosphorylationprostate cancerstem cellubiquitination

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