HSP90 (Heat Shock Protein 90) inhibition is a research area that focuses on targeting the HSP90 protein, which plays a critical role in cellular function and is involved in the folding, stability, and function of a variety of client proteins that are important for cell survival and proliferation. By inhibiting HSP90, researchers aim to disrupt the functions of these client proteins, leading to the suppression of tumor growth in cancer cells, as many oncogenic proteins rely on HSP90 for their stability and activity. HSP90 inhibition is being actively investigated as a potential treatment strategy for various types of cancer, as well as other diseases where HSP90 plays a role in the progression of the disease.