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介导对多重耐药人类病原体的靶向作用的内生真菌。

Endophytic fungi of mediated targeting of Multi-Drug resistant human pathogens.

作者信息

Dhevi V Sundar Ranjitha, Arunachalam Sathiavelu

机构信息

School of Biosciences and Technology, Vellore Institute of Technology, Vellore 14, India.

VIT School of Agricultural Innovations and Advanced Learning, VIT, Vellore, India.

出版信息

Saudi J Biol Sci. 2024 Mar;31(3):103937. doi: 10.1016/j.sjbs.2024.103937. Epub 2024 Jan 20.

Abstract

Antimicrobial resistance (AMR) has emerged as one of the most serious worldwide public health issues of the twenty-first century. The expeditious rise of AMR has urged the development of new, natural effective therapeutic strategies against drug-resistant pathogens. Endophytic fungi, which inhabit distinctive environments like endosymbiotic relationships with plants, are gaining interest as alternative reservoirs for novel compounds that exhibit a broad range of chemical diversity and unique modes of action by releasing a variety of secondary metabolites with antimicrobial properties. The objective of the current research was to isolate and identify endophytic fungal species from leaves of and to investigate their antagonistic effects on Multi-Drug-Resistant human pathogens. Endophytic fungus TPL11 and TPL14 showed maximum inhibition in agar plug and agar well diffusion assay. The ethyl acetate crude extract effectively suppressed growth of MRSA (Methicillin-resistant ) ATCC 43300,700699 strains and VRE (Vancomycin-resistant ) with the Inhibition zone of 22 ± 0.05, 23 ± 0.11 and 24 ± 0.11 mm respectively with minimum inhibitory concentration (MIC) of 3.125 µg/mL. Whereas TPL11 fungus revealed antibiosis of 22 ± 0.05 and 21 ± 0.15 mm against MRSA(ATCC 43300,700699) and 24 ± 0.05 mm for VRE with MIC of 6.25,3.125 and 1.56 μg/mL respectively. The MIC (Minimum inhibitory concentration) index further confirmed that both the extracts were bacteriostatic against MRSA and bactericidal against VRE. The isolates TPL11 and TPL14 were identified as and by 18S rRNA internal transcribed spacer (ITS) sequencing. To our insight, it is the first report to reveal the presence of and in and their antibacterial activity.

摘要

抗菌耐药性(AMR)已成为21世纪全球最严重的公共卫生问题之一。AMR的迅速上升促使人们开发针对耐药病原体的新型天然有效治疗策略。内生真菌生活在与植物的内共生关系等独特环境中,作为新型化合物的替代来源正受到关注,这些化合物通过释放具有抗菌特性的多种次生代谢产物展现出广泛的化学多样性和独特的作用方式。当前研究的目的是从[植物名称]叶片中分离和鉴定内生真菌物种,并研究它们对多重耐药人类病原体的拮抗作用。内生真菌TPL11和TPL14在琼脂块和琼脂孔扩散试验中显示出最大抑制作用。乙酸乙酯粗提物有效抑制了耐甲氧西林金黄色葡萄球菌(MRSA)ATCC 43300、700699菌株和耐万古霉素肠球菌(VRE)的生长,抑菌圈分别为22±0.05、23±0.11和24±0.11毫米,最低抑菌浓度(MIC)为3.125微克/毫升。而TPL11真菌对MRSA(ATCC 43300、700699)的抑菌圈分别为22±0.05和21±0.15毫米,对VRE的抑菌圈为24±0.05毫米,MIC分别为6.25、3.125和1.56微克/毫升。MIC(最低抑菌浓度)指数进一步证实,两种提取物对MRSA均具有抑菌作用,对VRE具有杀菌作用。通过18S rRNA内部转录间隔区(ITS)测序,分离株TPL11和TPL14被鉴定为[具体真菌名称1]和[具体真菌名称2]。据我们所知,这是首次报道在[植物名称]中发现[具体真菌名称1]和[具体真菌名称2]及其抗菌活性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a2fa/10863426/94a0c26de28a/gr1.jpg

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