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Targeting chaperones in transformed systems--a focus on Hsp90 and cancer

Gabriela Chiosis1

  • 1Programme in Molecular Pharmacology and Chemistry, Department of Medicine, Memorial Sloan-Kettering Cancer Center, Box 482, New York, NY 10021, USA. chiosisg@mskcc.org

Expert Opinion on Therapeutic Targets
|January 31, 2006
PubMed

Insights

Heat shock protein 90 (Hsp90) is crucial for cancer cell survival by stabilizing oncogenic proteins. Inhibiting Hsp90 offers a promising therapeutic strategy for various cancers, though challenges remain.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • The molecular chaperone Hsp90 plays a vital role in maintaining cellular stability and viability, particularly under transforming pressures.
  • Cancer cells rely on Hsp90 to stabilize mutated or dysregulated oncogenic proteins, ensuring their functional activity and promoting tumor growth.

Purpose of the Study:

  • To review the current understanding of Hsp90's relevance in cancer.
  • To explore the therapeutic potential and limitations of Hsp90 inhibitors in cancer treatment.

Main Methods:

  • Review of existing scientific literature on Hsp90 function in cancer.
  • Analysis of Hsp90's role in regulating key oncogenic proteins and signaling pathways.
  • Evaluation of the feasibility and challenges of Hsp90-targeted cancer therapy.

Main Results:

  • Hsp90 chaperones essential proteins (e.g., Raf-1, Akt, survivin, hTERT) involved in tumor growth, survival, and replicative potential.
  • Hsp90 also regulates critical components of apoptotic pathways, influencing cancer cell fate.
  • Hsp90 inhibition presents a broad therapeutic strategy targeting multiple oncogenic transformations.

Conclusions:

  • Hsp90 is a significant therapeutic target due to its multifaceted roles in cancer.
  • Translating Hsp90 inhibitors into effective cancer therapies is feasible but requires addressing existing limitations.

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