活性的1个体载体1的功能性表征
Jeong Yeon Won1, Ernest Mazigo2, Seok Ho Cha1
1Department of Parasitology and Tropical Medicine, School of Medicine, Inha University, Incheon, Republic of Korea.
研究人员在Plasmodium vivax hexose载体1 (PvHT1) 中表征了葡萄糖的吸收. 阻止PvHT1为饥饿疟疾寄生虫提供了一种新的策略,有助于开发抗vivax疟疾的药物.
科学领域:
- 寄生虫学的寄生虫学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- *Plasmodium vivax是一种广泛传播的疟疾寄生虫,其根除受到药物耐药性和休眠肝脏阶段的阻碍.
- *迫切需要针对独特的寄生虫机制的新型抗疟疾药物.
- *通过赫索索载体阻断葡萄糖吸收是对寄生虫饥饿的一个有希望的策略.
研究的目的:
- * 为了阐明Plasmodium vivax hexose载体1 (PvHT1) 的葡萄糖吸收特性.
- * 评估PvHT1作为开发新抗疟疾疗法的潜在药物标.
主要方法:
- *在Xenopus laevis卵细胞中表达了来自朝鲜菌株 (PvHT1NK) 的PvHT1.
- *研究了 [3H] 脱氧-D-葡萄糖 (ddGlu) 运输动力学和基质特异性.
- *与Plasmodium falciparum hexose载体1 (PfHT1) 进行了序列和结构比较.
主要成果:
- * PvHT1NK介导的可和的葡萄糖摄取,不依赖于,遵循迈凯利斯-门动力学 (Km = 294.1 μM,Vmax = 1,060 pmol/oocyte/hr).
- * 葡萄糖,甘和ddGlu强烈抑制了PvHT1NK活性;果糖和银河糖显示弱抑制.
- * 葡萄糖结合口袋中保存的残留物表明PfHT1抑制剂对PvHT1.1有效.
结论:
- * PvHT1表现出明显的葡萄糖吸收特性,这对Plasmodium vivax碳水化合物代谢至关重要.
- * 向PvHT1为开发抗生素疟疾的新型抗疟疾药物提供了可行的策略.
- * 保存的葡萄糖结合部位支持P. vivax中现有的PfHT1抑制剂的疗效.
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