Sustained intrathecal delivery of amphotericin B using an injectable and biodegradable thermogel.

Sustained intrathecal delivery of amphotericin B using an injectable and biodegradable thermogel.
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DOI:
10.1080/10717544.2021.1892242
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发表时间:
2021-12
期刊:
影响因子:
6
通讯作者:
Chen J
Chen J
中科院分区:
医学2区
文献类型:
--
作者:
Lin W;Xu T;Wang Z;Chen J

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隐球菌性脑膜炎是一种真菌感染性疾病,预后差,死亡率高。两性霉素B (AMB)是治疗隐球菌脑膜炎的首选药物。血脑屏障(BBB)是药物有效输送到大脑的主要屏障。在这项研究中,AMB被纳入热敏凝胶鞘内注射。我们首次合成了amb负载热凝胶,研究了其体外累积释放、体内神经毒性和治疗效果。该热敏凝胶由25 wt%聚乳酸-共乙醇酸-聚乙二醇-聚乳酸-共乙醇酸(PLGA-PEG-PLGA)三嵌段聚合物水溶液组成。负载在热敏凝胶中的AMB(凝胶中的AMB)在低温下粘度较低,在37℃(生理温度)下形成不流动的凝胶。在凝胶中加载AMB可持续释放36 d,体外累积释放率令人满意。与AMB溶液相比,凝胶鞘内给药可以降低AMB的神经毒力,获得更好的治疗效果。目前的研究结果表明,可注射的PLGA-PEG-PLGA热凝胶是一种生物相容性载体,可将药物输送到鞘内。
Cryptococcal meningitis is a fungal infectious disease with a poor prognosis and high mortality. Amphotericin B (AMB) is the first choice for the treatment of cryptococcal meninges. The blood-brain barrier (BBB) is the major barrier for the effective delivery of drugs to the brain. In this study, AMB was incorporated in a thermosensitive gel for intrathecal injection. We first synthesized AMB-loaded thermogel, investigated its in vitro cumulative release, and in vivo neurotoxicity, and therapeutic effect. The thermosensitive gel was comprised of 25 wt% poly (lactic acid-co-glycolic acid)-poly (ethylene glycol)-poly (lactic acid-co-glycolic acid) (PLGA-PEG-PLGA) triblock polymer aqueous solution. The AMB loaded in the thermosensitive gel (AMB in gel) had low viscosity at low temperature and resulted in the formation of a non-flowing gel at 37 °C (physiological temperature). AMB loading in gel sustained its release for 36 days and the in vitro cumulative release rate was satisfactory. Compared with the AMB solution, intrathecal administration of AMB in gel could reduce the neurovirulence of AMB and get a better treatment effect. The findings of the current study show that the injectable PLGA–PEG–PLGA thermogel is a biocompatible carrier for the delivery of drugs into the intrathecal.
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