当前位置: X-MOL 学术Med. Mycol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Complexing amphotericin B with gold nanoparticles improves fungal clearance from the brains of mice infected with Cryptococcal neoformans
Medical Mycology ( IF 2.7 ) Pub Date : 2021-07-31 , DOI: 10.1093/mmy/myab042
Koteswara R Chintalacharuvu 1 , Zlatko A Matolek 1 , Benny Pacheco 2 , Erick M Carriera 3 , David O Beenhouwer 1, 4
Affiliation  

Amphotericin B (AmB) is used to treat cryptococcal meningoencephalitis. However, the mortality rate remains high. Higher doses of AmB in deoxycholate buffer (AmBd) are toxic to human red blood cells (hRBC) and have no effect on brain organism load in mice. Here we show that while AmBd lysed 96% of hRBC, AmB complexed with gold nanoparticles (AuNP-SA-AmB) lysed only 27% of hRBC. In vitro growth of C. neoformans was inhibited by 0.25 μg/ml AmBd and 0.04 μg/ml of AuNP-SA-AmB. In mice infected with C. neoformans, five daily treatments with AuNP-SA-AmB containing 0.25 mg/kg AmB significantly lowered the fungal burden in the brain tissue compared to either untreated or treatment with 0.25 mg/kg of AmBd. When a single dose of AmBd was injected intravenously into BALB/c mice, 81.61% of AmB cleared in the α-phase and 18.39% cleared in the β-phase at a rate of 0.34% per hour. In contrast, when AuNP-SA-AmB was injected, 49.19% of AmB cleared in the α-phase and 50.81% of AmB cleared in the β-phase at a rate of 0.27% per hour. These results suggest that AmB complexed with gold nanoparticles is less toxic to hRBC, is more effective against C. neoformans and persists longer in blood when injected into mice resulting in more effective clearing of C. neoformans from the brain tissue. Lay summary Amphotericin B (AmB) was complexed with gold nanoparticles (AuNP-SA-AmB) to improve brain delivery. AuNP-SA-AmB was more effective than AmB alone in clearing of Cryptococcus neoformans from the brain tissue of infected mice. This may be due to longer plasma half-life of AmB as AuNP-SA-AmB.

中文翻译:


将两性霉素 B 与金纳米粒子复合可改善新型隐球菌感染小鼠大脑中的真菌清除率



两性霉素 B (AmB) 用于治疗隐球菌性脑膜脑炎。然而,死亡率仍然很高。脱氧胆酸盐缓冲液 (AmBd) 中较高剂量的 AmB 对人红细胞 (hRBC) 有毒,但对小鼠脑组织负荷没有影响。在这里,我们表明,虽然 AmBd 裂解了 96% 的 hRBC,但 AmB 与金纳米颗粒复合 (AuNP-SA-AmB) 仅裂解了 27% 的 hRBC。 0.25 μg/ml AmBd 和 0.04 μg/ml AuNP-SA-AmB 抑制新型隐球菌的体外生长。在感染新型隐球菌的小鼠中,与未治疗或用 0.25 mg/kg AmBd 治疗相比,每天用含有 0.25 mg/kg AmB 的 AuNP-SA-AmB 治疗 5 次,可显着降低脑组织中的真菌负荷。当单剂量AmBd静脉注射给BALB/c小鼠时,81.61%的AmB在α相被清除,18.39%在β相被清除,清除速度为每小时0.34%。相反,当注射 AuNP-SA-AmB 时,49.19% 的 AmB 在 α 相中被清除,50.81% 的 AmB 在 β 相中以每小时 0.27% 的速度被清除。这些结果表明,与金纳米粒子复合的 AmB 对 hRBC 的毒性较小,对新型隐球菌更有效,并且注射到小鼠体内后在血液中的持续时间更长,从而更有效地从脑组织中清除新型隐球菌。简单总结 两性霉素 B (AmB) 与金纳米颗粒 (AuNP-SA-AmB) 复合,可改善大脑输送。 AuNP-SA-AmB 在清除受感染小鼠脑组织中的新型隐球菌方面比单独使用 AmB 更有效。这可能是由于 AuNP-SA-AmB 的 AmB 血浆半衰期较长。
更新日期:2021-07-31
down
wechat
bug