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小分子拼接调节器破坏了O-GlcNAc的平衡
Steven S Cheng1, Alison C Mody1, Amedeo Vetere2
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
Nature communications
|January 12, 2026
概括
药物重新定位屏幕识别了酶抑制剂,通过调节拼接来破坏O-GlcNAc的平衡. 这些化合物降低了O-GlcNAc转移酶 (OGT) 和O-GlcNAcase (OGA) 的下调,独立于它们已知的标.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 与O相关的N-乙糖胺 (O-GlcNAc) 是由OGT和OGA调节的关键的翻译后修饰.
- O-GlcNAc的失调与各种人类疾病有关,这引起了治疗的兴趣.
- 药物重定向提供了一种策略,以识别调节O-GlcNAc通路的化合物.
研究的目的:
- 为了确定具有临床意义的化合物,可以治疗调节O-GlcNAc平衡.
- 为了研究药物重定位候选剂与O-GlcNAc循环酶的交叉作用.
- 发现破坏O-GlcNAc平衡的新机制.
主要方法:
- 在细胞和体外对O-GlcNAc循环酶进行了三次并行药物重定向查.
- 使用激酶抑制剂GSK690693和Y-33075,以评估它们对O-GlcNAc稳态的影响.
- 评估了一个拼接调节器面板,以评估它们对OGT和OGA表达的影响.
主要成果:
- 确定GSK690693和Y-33075是剪接调节剂,通过降低OGT和OGA的调节来破坏O-GlcNAc稳态.
- 这些效应与抑制剂已知的标 (AKT和ROCK) 独立,与直接的OGT/OGA抑制剂不同.
- 发现额外的拼接调节器 (OTS964,indisulam,GNF2133) 降低了具有独特拼接配置文件的OGT和OGA的下调.
结论:
- 激酶抑制剂可以作为拼接调节剂来破坏O-GlcNAc的平衡.
- 药物重定向幕揭示了通过拼接调节准O-GlcNAc循环酶的新型化学型.
- 这些发现为与O-GlcNAc失调相关的疾病提供了新的治疗策略.
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