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Ref Type | Journal Article | ||||||||||||
PMID | (26645561) | ||||||||||||
Authors | Lee SC, Min HY, Choi H, Bae SY, Park KH, Hyun SY, Lee HJ, Moon J, Park SH, Kim JY, An H, Park SJ, Seo JH, Lee S, Kim YM, Park HJ, Lee SK, Lee J, Lee J, Kim KW, Suh YG, Lee HY | ||||||||||||
Title | Deguelin Analogue SH-1242 Inhibits Hsp90 Activity and Exerts Potent Anticancer Efficacy with Limited Neurotoxicity. | ||||||||||||
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Abstract Text | The Hsp90 facilitates proper folding of signaling proteins associated with cancer progression, gaining attention as a target for therapeutic intervention. The natural rotenoid deguelin was identified as an Hsp90 inhibitor, but concerns about neurotoxicity have limited prospects for clinical development. In this study, we report progress on deguelin analogues that address this limitation, focusing on the novel analogue SH-1242 as a candidate to broadly target human lung cancer cells, including those that are chemoresistant or harboring KRAS mutations. In a KRAS-driven mouse model of lung cancer, SH-1242 administration reduced tumor multiplicity, volume, and load. Similarly, in human cell line-based or patient-derived tumor xenograft models, SH-1242 induced apoptosis and reduced tumor vasculature in the absence of detectable toxicity. In contrast to deguelin, SH-1242 toxicity was greatly reduced in normal cells and when administered to rats did not produce obvious histopathologic features in the brain. Mechanistic studies revealed that SH-1242 bound to the C-terminal ATP-binding pocket of Hsp90, disrupting the ability to interact with its co-chaperones and clients and triggering a degradation of client proteins without affecting Hsp70 expression. Taken together, our findings illustrate the superior properties of SH-1242 as an Hsp90 inhibitor and as an effective antitumor and minimally toxic agent, providing a foundation for advancing further preclinical and clinical studies. |
Molecular Profile | Treatment Approach |
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Gene Name | Source | Synonyms | Protein Domains | Gene Description | Gene Role |
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Drug Name | Trade Name | Synonyms | Drug Classes | Drug Description |
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SH-1242 | HSP90 Inhibitor 35 | SH-1242 is an analog of deguelin that binds the C-terminus of Hsp90 and inhibits its function, resulting in decreased tumor cell growth (PMID: 26645561). |
Gene | Variant | Impact | Protein Effect | Variant Description | Associated with drug Resistance |
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Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
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