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Updated: May 24, 2026

Malachite Green Assay for the Discovery of Heat-Shock Protein 90 Inhibitors
Published on: January 20, 2023
Heat shock protein 90 inhibitors as therapeutic agents
Isabel Gomez-Monterrey1, Marina Sala, Simona Musella
1Dipartimento di Chimica Farmaceutica e Tossicologica, Universita di Napoli Federico II, Via D. Montesano 49, 80131 Napoli, Italy. imgomez@unina.it
Abstract:
The molecular chaperone heat shock protein 90 (HSP90) is essential for the folding stability, intracellular disposition and proteolytic turnover of many of the key regulators of cell growth, differentiation and survival. These essential functions are used by the cells during the oncogenesis process to allow the tumor transformation and facilitate the rapid somatic evolution. Inhibition of HSP90 would provide combinatorial blockade of a range of oncogenic pathways, antagonizing many of the hallmark traits of cancer. Several HSP90 inhibitors are currently under clinical trial investigation for the treatment of cancer. This review summarizes the current state and progress achieved in the development of HSP90 inhibitors targeting the N-terminal ATP pocket, C-terminal domain, different compartmentalized isoforms, and protein (cochaperones and/or client proteins)/HSP90 interactions. In the context of drug discovery, the most relevant patents which appeared recently in the literature are discussed as well.
Insights
Heat shock protein 90 (HSP90) is crucial for cancer cell growth. Inhibiting HSP90 offers a promising strategy to block multiple cancer pathways, with several HSP90 inhibitors in clinical trials.
Area of Science:
- Oncology
- Molecular Biology
- Drug Discovery
Background:
- Heat shock protein 90 (HSP90) is a molecular chaperone vital for cancer cell growth, survival, and tumor transformation.
- HSP90 regulates key proteins involved in cell growth, differentiation, and survival, making it a target for cancer therapy.
Purpose of the Study:
- To review the current progress in the development of HSP90 inhibitors for cancer treatment.
- To discuss recent patents related to HSP90 inhibitors in drug discovery.
Main Methods:
- Review of scientific literature and recent patents on HSP90 inhibitors.
- Analysis of HSP90 inhibitors targeting different domains (N-terminal ATP pocket, C-terminal), isoforms, and interactions (cochaperones, client proteins).
Main Results:
- HSP90 inhibition provides a combinatorial blockade of oncogenic pathways, counteracting cancer hallmarks.
- Several HSP90 inhibitors are under clinical investigation for various cancer types.
- Recent patents highlight advancements in HSP90 inhibitor drug discovery.
Conclusions:
- HSP90 inhibitors represent a promising therapeutic strategy for cancer treatment.
- Targeting HSP90 offers a way to antagonize multiple cancer-driving pathways simultaneously.
- Continued research and development in HSP90 inhibitor drug discovery are crucial for advancing cancer therapy.
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