Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, 100700, People's Republic of China.
The Hospital of Nanbu County, Sichuan, People's Republic of China.
J Nanobiotechnology. 2022 Jul 6;20(1):318. doi: 10.1186/s12951-022-01493-8.
Cerebral malaria (CM) is a life-threatening neurological complication caused by Plasmodium falciparum. About 627,000 patients died of malaria in 2020. Currently, artemisinin and its derivatives are the front-line drugs used for the treatment of cerebral malaria. However, they cannot target the brain, which decreases their effectiveness. Therefore, increasing their ability to target the brain by the nano-delivery system with brain-targeted materials is of great significance for enhancing the effects of antimalarials and reducing CM mortality. This study used glucose transporter 1 (GLUT1) on the blood-brain barrier as a target for a synthesized cholesterol-undecanoic acid-glucose conjugate. The molecular dynamics simulation found that the structural fragment of glucose in the conjugate faced the outside the phospholipid bilayers, which was conducive to the recognition of brain-targeted liposomes by GLUT1. The fluorescence intensity of the brain-targeted liposomes (na-ATS/TMP@lipoBX) in the mouse brain was significantly higher than that of the non-targeted liposomes (na-ATS/TMP@lipo) in vivo (P < 0.001) after intranasal administration. The infection and recurrence rate of the mice receiving na-ATS/TMP@lipoBX treatment were significantly decreased, which had more advantages than those of other administration groups. The analysis of pharmacokinetic data showed that na-ATS/TMP@lipoBX could enter the brain in both systemic circulation and nasal-brain pathway to treat malaria. Taken together, these results in this study provide a new approach to the treatment of cerebral malaria.
脑型疟疾(CM)是由恶性疟原虫引起的危及生命的神经系统并发症。2020 年,约有 62.7 万人死于疟疾。目前,青蒿素及其衍生物是治疗脑型疟疾的一线药物。然而,它们不能靶向大脑,这降低了它们的疗效。因此,通过具有脑靶向材料的纳米递药系统增加它们靶向大脑的能力,对于增强抗疟药的效果和降低 CM 死亡率具有重要意义。本研究以血脑屏障上的葡萄糖转运蛋白 1(GLUT1)为靶标,合成了胆固醇-十一烷酸-葡萄糖缀合物。分子动力学模拟发现,缀合物中葡萄糖的结构片段面向磷脂双层的外侧,有利于 GLUT1 识别脑靶向脂质体。脑靶向脂质体(na-ATS/TMP@lipoBX)在小鼠脑内的荧光强度明显高于非靶向脂质体(na-ATS/TMP@lipo)(P < 0.001),经鼻腔给药后。接受 na-ATS/TMP@lipoBX 治疗的小鼠感染和复发率明显降低,比其他给药组具有更多优势。药代动力学数据分析表明,na-ATS/TMP@lipoBX 可以通过全身循环和鼻脑途径进入大脑,用于治疗疟疾。综上所述,本研究结果为治疗脑型疟疾提供了一种新方法。
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