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Heat shock protein 90: the cancer chaperone

Len Neckers1

  • 1Urologic Oncology Branch, National Cancer Institute, Bethesda, MD 20892, USA. len@helix.nih.gov

Journal of Biosciences
|May 31, 2007
PubMed

Insights

Heat shock protein 90 (Hsp90) inhibitors target multiple cancer pathways, enhancing chemotherapy efficacy and overcoming drug resistance. These inhibitors also show promise in treating neurodegenerative diseases.

Area of Science:

  • Oncology
  • Molecular Biology
  • Neuroscience

Background:

  • Heat shock protein 90 (Hsp90) is a molecular chaperone crucial for cancer cell growth and survival.
  • Hsp90 stabilizes mutated and overexpressed signaling proteins that promote tumorigenesis.
  • Cancer cells exhibit genetic plasticity, leading to evasion of targeted therapies.

Purpose of the Study:

  • To explore the therapeutic potential of Hsp90 inhibitors in cancer treatment.
  • To investigate the combination of Hsp90 inhibitors with standard chemotherapeutic agents.
  • To evaluate the role of Hsp90 inhibitors in neurodegenerative disease models.

Main Methods:

  • Inhibiting Hsp90 to disrupt multiple cancer cell signaling pathways.
  • Combining Hsp90 inhibitors with conventional chemotherapy.
  • Assessing Hsp90 inhibitor efficacy in preclinical models of cancer and neurodegeneration.

Main Results:

  • Hsp90 inhibitors simultaneously target multiple signaling pathways, unlike traditional targeted agents.
  • Combination therapy with Hsp90 inhibitors significantly enhances the in vivo efficacy of standard chemotherapeutics.
  • Hsp90 inhibitors demonstrate ameliorative effects in neurodegenerative disease models by inducing Hsp70 expression.

Conclusions:

  • Hsp90 inhibitors offer a unique mechanism-based approach for treating diverse cancers, alone or in combination.
  • These inhibitors can overcome cancer's genetic plasticity and resistance to targeted therapies.
  • Hsp90 inhibitors present a novel therapeutic strategy for neurodegenerative pathologies.

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