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Updated: Feb 22, 2026
Malachite Green Assay for the Discovery of Heat-Shock Protein 90 Inhibitors
Published on: January 20, 2023
Targeting Heat Shock Proteins in Cancer: A Promising Therapeutic Approach
Suman Chatterjee1, Timothy F Burns2
1Department of Medicine, Division of Hematology Oncology, UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA 15213, USA. chatterjees@upmc.edu.
Abstract:
Heat shock proteins (HSPs) are a large family of chaperones that are involved in protein folding and maturation of a variety of "client" proteins protecting them from degradation, oxidative stress, hypoxia, and thermal stress. Hence, they are significant regulators of cellular proliferation, differentiation and strongly implicated in the molecular orchestration of cancer development and progression as many of their clients are well established oncoproteins in multiple tumor types. Interestingly, tumor cells are more HSP chaperonage-dependent than normal cells for proliferation and survival because the oncoproteins in cancer cells are often misfolded and require augmented chaperonage activity for correction. This led to the development of several inhibitors of HSP90 and other HSPs that have shown promise both preclinically and clinically in the treatment of cancer. In this article, we comprehensively review the roles of some of the important HSPs in cancer, and how targeting them could be efficacious, especially when traditional cancer therapies fail.
Insights
Heat shock proteins (HSPs) are crucial for cancer cell survival by aiding misfolded oncoproteins. Targeting HSPs, particularly HSP90, offers a promising therapeutic strategy for cancer treatment, especially when other therapies fail.
Area of Science:
- Molecular Biology
- Oncology
- Biochemistry
Background:
- Heat shock proteins (HSPs) are molecular chaperones vital for protein folding and cellular protection.
- HSPs regulate cellular proliferation and differentiation, playing a key role in cancer development.
- Tumor cells exhibit increased dependence on HSPs for survival due to misfolded oncoproteins.
Purpose of the Study:
- To review the significant roles of HSPs in various cancer types.
- To explore the potential of targeting HSPs as a cancer therapy strategy.
- To discuss the efficacy of HSP inhibitors when conventional treatments are ineffective.
Main Methods:
- Comprehensive literature review of HSP functions in cancer.
- Analysis of preclinical and clinical data on HSP-targeted therapies.
- Examination of the molecular mechanisms underlying HSP dependency in cancer cells.
Main Results:
- HSPs are implicated in the progression of multiple tumor types by chaperoning oncoproteins.
- Inhibitors targeting HSP90 and other HSPs have demonstrated preclinical and clinical promise.
- Targeting HSPs is particularly relevant for cancers resistant to traditional therapies.
Conclusions:
- HSPs are critical regulators in cancer development and progression.
- Targeting HSPs represents a viable therapeutic avenue for cancer treatment.
- HSP-based therapies hold potential for overcoming resistance to conventional cancer treatments.
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