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通过体外和计算机模拟研究解析(L.) Willd.叶和茎的抗菌、抗生物膜及膜稳定协同作用的证据

Deciphering the antimicrobial, antibiofilm and membrane stabilizing synergism of (L.) Willd. leaves and stems substantiation through in vitro and in silico studies.

作者信息

Tumpa Nadia Islam, Chowdhury Md Helal Uddin, Asma Ankhy Alamgir

机构信息

Department of Microbiology, University of Chittagong, Chattogram-4331, Bangladesh.

Ethnobotany and Pharmacognosy Lab, Department of Botany, University of Chittagong, Chattogram-4331, Bangladesh.

出版信息

Biotechnol Rep (Amst). 2023 Apr 16;38:e00797. doi: 10.1016/j.btre.2023.e00797. eCollection 2023 Jun.

Abstract

Considering the traditional application of (L.) Willd. against wounds and itching. Leaves (MSL) and stems (MSS) were sequentially extracted using solvents petroleum-ether, carbon-tetrachloride, chloroform, ethyl-acetate and ethanol. Disk-diffusion assay revealed the ethyl acetate MSL and MSS extracts were the prominent against ten bacteria, five carbapenem-resistant bacteria and one fungal strains. Subsequent quantitative antimicrobial analysis specified MSL extractives more potent over MSS with lower 1500 and 3500µg/ml MIC and MBC value in both gram-negative and positive bacteria. These sturdiest ethyl-acetate MSL extractives antimicrobial efficiency also fostered fungicidal activity having lower 100µg/ml MFC. Whereat, almost homologous 160-180 min timing noted liken to standard ciprofloxacin susceptibility in both strains, 75% biofilm inhibition at 2×MIC concentration along with 92±0.2% membrane stabilizing activities over synthetic counterparts prospected in preceding standard extractives. Computational molecular docking of MSL compounds supported this findings therefore forego this valuable synergistic insight as antimicrobial agents to efficiently eradicate human infections.

摘要

考虑到(L.)Willd.在治疗伤口和瘙痒方面的传统应用。依次用石油醚、四氯化碳、氯仿、乙酸乙酯和乙醇对叶(MSL)和茎(MSS)进行提取。纸片扩散法显示,乙酸乙酯MSL和MSS提取物对十种细菌、五种耐碳青霉烯类细菌和一种真菌菌株具有显著的抗菌活性。随后的定量抗菌分析表明,MSL提取物比MSS提取物更有效,在革兰氏阴性菌和阳性菌中,其最低抑菌浓度(MIC)和最低杀菌浓度(MBC)分别为1500和3500µg/ml。这些最强效的乙酸乙酯MSL提取物的抗菌效率还促进了杀真菌活性,其最低杀菌浓度(MFC)为100µg/ml。在这两种菌株中,观察到与标准环丙沙星敏感性几乎同源的160 - 180分钟时间,在2倍MIC浓度下生物膜抑制率为75%,与之前标准提取物相比,对合成物的膜稳定活性为92±0.2%。MSL化合物的计算分子对接支持了这一发现,因此作为抗菌剂放弃了这种有价值的协同见解,以有效消除人类感染。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3c09/10131130/77e8abb0fe84/ga1.jpg

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