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-Structure paper
| タイトル | Preclinical characterization of novel multi-client inhibitors of Sec61 with broad antitumor activity. |
|---|---|
| ジャーナル・号・ページ | J Pharmacol Exp Ther, Vol. 392, Issue 8, Page 103634, Year 2025 |
| 掲載日 | 2025年6月14日 |
著者 | Eric Lowe / Janet L Anderl / David Bade / Cristina Delgado-Martin / Chengguo Dong / R Andrea Fan / Ying Fang / Jing Jiang / Henry W B Johnson / Aaron Kempema / Phil McGilvray / Dustin McMinn / Beatriz Millare / Tony Muchamuel / Nicole Poweleit / Yu Qian / Shahid Rehan / Giovanna Scapin / Ajia Sugahara / Dale Tranter / Brian Tuch / Jinhai Wang / Laurie Wang / Jennifer A Whang / Patricia Zuno-Mitchell / Ville O Paavilainen / Eunyong Park / Jack Taunton / Christopher J Kirk / Neel K Anand / ![]() |
| PubMed 要旨 | The Sec61 translocon mediates entry of most secreted and transmembrane proteins into the endoplasmic reticulum, providing a novel therapeutic target to block the expression of protumorigenic factors. ...The Sec61 translocon mediates entry of most secreted and transmembrane proteins into the endoplasmic reticulum, providing a novel therapeutic target to block the expression of protumorigenic factors. Sec61 inhibitors with antitumor activity, mostly derived from natural products, have been reported. However, poor tolerability and suboptimal pharmaceutical properties have precluded their further development. We report here the discovery and characterization of KZR-834 and KZR-261, related small molecule analogs that directly bind to the Sec61 channel to potently inhibit the biogenesis of a subset of Sec61 client proteins. This client inhibition profile includes several tumorigenic factors, results in the activation of an endoplasmic reticulum stress response, and leads to broad anticancer effects in vitro. In vivo, KZR-261 was well tolerated and exhibits antitumor effects across multiple models, both as a single agent and in combination with anti-PD-1 immunotherapy. Based on the strength of this preclinical data, KZR-261 progressed into a phase I clinical trial (NCT05047536) in patients with malignant disease, where it was found to be well tolerated at doses that achieved durable stable disease. These results highlight the potential of Sec61 inhibition as a novel therapeutic target. SIGNIFICANCE STATEMENT: KZR-834 and KZR-261 are novel Sec61 inhibitors with the ability to block multiple Sec61 client proteins, leading to well-tolerated efficacy in in vivo cancer models. This represents a novel mechanism for blocking expression of oncogenic factors, including those not amenable to targeting through conventional methods. |
リンク | J Pharmacol Exp Ther / PubMed:40669140 |
| 手法 | EM (単粒子) |
| 解像度 | 2.6 - 3.1 Å |
| 構造データ | EMDB-46597, PDB-9d6l: ![]() EMDB-46598: Human-yeast chimeric Sec complex bound to KZR-261 inhibitor EMDB-52520, PDB-9hz5: |
| 化合物 | ![]() PDB-1a2b: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / Sec61 / translocon / translocation / endoplasmic reticulum / secretion / PROTEIN TRANSPORT / ribosome / Protein translocation |
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