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M-COPA, a novel Golgi system disruptor, suppresses apoptosis induced by Shiga toxin

机译:M-COPA,一种新型的高尔基体系统破坏剂,抑制志贺毒素诱导的细胞凋亡

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Shiga toxin (Stx) is a main virulence factor of Stx-producing Escherichia coli (STEC) that contributes to diarrhea and hemorrhagic colitis and occasionally to fatal systemic complications. Therefore, the development of an antidote to neutralize Stx toxicity is urgently needed. After internalization into cells, Stx is transferred to the Golgi apparatus via a retrograde vesicular transport system. We report here that 2-methylcoprophilinamide (M-COPA), a compound that induces disassembly of the Golgi apparatus by inactivating ADP-ribosylation factor 1 (Arf1), suppresses Stx-induced apoptosis. M-COPA inhibited transport of Stx from the plasma membrane to the Golgi apparatus and suppressed degradation of anti-apoptotic proteins and the activation of caspases. These findings suggest that inhibition of Stx retrograde transport by M-COPA could be a novel approach to suppress Stx toxicity.
机译:志贺毒素(Stx)是产Stx的大肠杆菌(STEC)的主要毒力因子,可导致腹泻和出血性结肠炎,并有时导致致命的全身性并发症。因此,迫切需要开发一种中和Stx毒性的解毒剂。内化成细胞后,Stx通过逆行囊泡转运系统转移到高尔基体中。我们在这里报告的2-甲基coprophilinamide(M-COPA),通过失活ADP-核糖基化因子1(Arf1)诱导高尔基体拆卸的化合物,抑制Stx诱导的细胞凋亡。 M-COPA抑制了Stx从质膜到高尔基体的转运,并抑制了抗凋亡蛋白的降解和胱天蛋白酶的活化。这些发现表明,M-COPA抑制Stx逆行转运可能是抑制Stx毒性的新方法。

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