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Novel Cell-Killing Mechanisms of Hydroxyurea and the Implication toward Combination Therapy for the Treatment of Fungal Infections

机译:羟基脲的新细胞杀灭机制及对治疗真菌感染的联合疗法的含义

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We have previously reported that an erg11 mutation affecting ergosterol synthesis and a hem13 mutation in the heme synthesis pathway significantly sensitize the fission yeast Schizosaccharomyces pombe to hydroxyurea (HU) (1, 2). Here we show that treatment with inhibitors of Erg11 and heme biosynthesis phenocopies the two mutations in sensitizing wild-type cells to HU. Importantly, HU synergistically interacts with the heme biosynthesis inhibitor sampangine and several Erg11 inhibitors, the antifungal azoles, in causing cell lethality. Since the synergistic drug interactions are also observed in the phylogenetically divergent Saccharomyces cerevisiae and the opportunistic fungal pathogen Candida albicans, the synergism is likely conserved in eukaryotes. Interestingly, our genetic data for S. pombe has also led to the discovery of a robust synergism between sampangine and the azoles in C. albicans. Thus, combinations of HU, sampangine, and the azoles can be further studied as a new method for the treatment of fungal infections.
机译:我们之前据报道,影响Ergosterol合成的ERG11突变和血红素合成途径中的HEM13突变显着敏感裂变酵母Schizosaccaromyces Pombe至羟基脲(Hu)(1,2)。在这里,我们显示ERG11和血红素合成抑制剂的治疗方法对野生型细胞的两个突变进行了敏感。重要的是,HU协同与血红素生物合成抑制剂SAMPANGINE和几枚ERG11抑制剂,抗真菌脂肪抑制剂的促进相互作用,导致细胞致死。由于在系统源性发育性酿酒酵母和机会性真菌病原体念珠菌中也观察到协同药物相互作用,因此在真核生物中可能保守协同作用。有趣的是,我们的S.Pombe的遗传数据也导致了SAMPANGINE和丙醇在C. albicans中的肥沃之间的强大协同作用。因此,可以进一步研究胡,SAMPANGINE和吡咯的组合作为治疗真菌感染的新方法。

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