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-Structure paper
| タイトル | Gliocidin is a nicotinamide-mimetic prodrug that targets glioblastoma. |
|---|---|
| ジャーナル・号・ページ | Nature, Vol. 636, Issue 8042, Page 466-473, Year 2024 |
| 掲載日 | 2024年11月20日 |
著者 | Yu-Jung Chen / Swathi V Iyer / David Chun-Cheng Hsieh / Buren Li / Harold K Elias / Tao Wang / Jing Li / Mungunsarnai Ganbold / Michelle C Lien / Yu-Chun Peng / Xuanhua P Xie / Chenura D Jayewickreme / Marcel R M van den Brink / Sean F Brady / S Kyun Lim / Luis F Parada / ![]() |
| PubMed 要旨 | Glioblastoma is incurable and in urgent need of improved therapeutics. Here we identify a small compound, gliocidin, that kills glioblastoma cells while sparing non-tumour replicative cells. ...Glioblastoma is incurable and in urgent need of improved therapeutics. Here we identify a small compound, gliocidin, that kills glioblastoma cells while sparing non-tumour replicative cells. Gliocidin activity targets a de novo purine synthesis vulnerability in glioblastoma through indirect inhibition of inosine monophosphate dehydrogenase 2 (IMPDH2). IMPDH2 blockade reduces intracellular guanine nucleotide levels, causing nucleotide imbalance, replication stress and tumour cell death. Gliocidin is a prodrug that is anabolized into its tumoricidal metabolite, gliocidin-adenine dinucleotide (GAD), by the enzyme nicotinamide nucleotide adenylyltransferase 1 (NMNAT1) of the NAD salvage pathway. The cryo-electron microscopy structure of GAD together with IMPDH2 demonstrates its entry, deformation and blockade of the NAD pocket. In vivo, gliocidin penetrates the blood-brain barrier and extends the survival of mice with orthotopic glioblastoma. The DNA alkylating agent temozolomide induces Nmnat1 expression, causing synergistic tumour cell killing and additional survival benefit in orthotopic patient-derived xenograft models. This study brings gliocidin to light as a prodrug with the potential to improve the survival of patients with glioblastoma. |
リンク | Nature / PubMed:39567689 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 1.82 Å |
| 構造データ | EMDB-47016, PDB-9dmu: |
| 化合物 | ![]() ChemComp-IMP: ![]() PDB-1a7t: ![]() ChemComp-K: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | OXIDOREDUCTASE / dehydrogenase / substrate / inhibitor |
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