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Updated: Jan 11, 2026

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STUB1 (CHIP) - a prognostic marker in cancer.

Subhajit Karmakar1,2, Mouli Chatterjee1,2, Malini Basu3

  • 1Cancer Biology and Inflammatory Disorder Division, Council of Scientific and Industrial Research-Indian Institute of Chemical Biology (CSIR-IICB), TRUE Campus, CN-6, Sector-V, Salt Lake, Kolkata-700091 & 4, Raja S.C. Mullick Road, Jadavpur, Kolkata-700032, India. mrinalghosh@iicb.res.in.

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|November 19, 2025
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Summary

STUB1 (CHIP) exhibits dual roles in cancer, impacting patient prognosis differently based on cancer type. Understanding STUB1

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Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • STUB1, also known as C-terminus of Hsc70-Interacting Protein (CHIP), is an E3 ubiquitin ligase crucial for protein homeostasis.
  • STUB1's involvement in tumorigenesis is suggested by its regulation of key oncogenic and tumor suppressor proteins.

Purpose of the Study:

  • To investigate the prognostic significance of STUB1 expression across diverse cancer types.
  • To analyze the dual role of STUB1 in cancer progression and its potential as a prognostic marker.

Main Methods:

  • Comprehensive pan-cancer analysis using The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) databases.
  • Validation in multiple cancer cell lines using immunoblotting and complementary assays.

Main Results:

  • Distinct STUB1 expression patterns observed across different cancer types.
  • Correlation between STUB1 expression levels and clinical outcomes, with high expression linked to worse prognosis in some cancers and low expression in others.
  • Evidence of STUB1's dual role in degrading tumor suppressors or oncogenic factors, influencing cancer prognosis.

Conclusions:

  • STUB1 (CHIP) acts as a potential prognostic marker with context-dependent roles in various cancers.
  • STUB1's modulation of protein homeostasis suggests its potential as a therapeutic target for cancer treatment.
  • Further research is needed to fully elucidate STUB1's mechanisms in tumorigenesis.