植物化学物质作为Uropathognic Escherichia Coli FimH拮抗剂：体外和硅胶方法

Title:Phytochemicals As Uropathognic Escherichia Coli FimH Antagonist: In Vitro And In Silico Approach

Volume: 18 Issue: 9

关键词: 致病性大肠杆菌，抗粘性fimh拮抗剂，分子对接，分子动力学模拟，植物化学物质。致病性大肠杆菌，抗粘性fimh拮抗剂，分子对接，分子动力学模拟，植物化学物质。

摘要: Background: Urinary tract infection (UTI) is caused by uropathogenic Escherichia coli (UPEC). The UPEC initiate pathogenesis by expressing type 1 pili, which attach to membrane receptors on the uroepithelial cells. Inhibition of attachment can provide a valuable target for prophylaxis in symptom-free milieu.

Methods: The antibacterial efficacy of alcoholic, hydroalcoholic and aqueous extracts of four plants namely Achyranthes aspera, Andrographis paniculata, Artemissia vulgaris and Glycyrrhiza glabra was evaluated against seven isolated bacterial strains and procured E. coli (UTI89/UPEC) strain. Screening of isolated strains was based on morphological characteristics and biofilm forming ability followed by physiological and biochemical analysis.

Results: The hydroalcoholic extracts of G. glabra at 50 μg/ml showed an impending antioxidant (DPPH) effect of 95.65% compared to ascorbic acid. The MIC values of all the plant extracts against selected bacterial strains ranged between 125 to 1000 μg/ml. In silico molecular docking performed to make out the antiadhesive role of 115 documented phytochemicals from selected plants identified quercetin-3-glucoside, ethyl caffeate, liquiritoside, liquiritin and isoliquiritigenin as potential phytochemicals. Molecular dynamics simulation performed by PTRAJ module of Amber11 package to monitor the stability of hydrogen bond showed that quercetin-3-glucoside and ethyl caffeate are potential phytochemicals as antiadhesive forming H-bonds with the FimH protein ligand.

Conclusions: Aforesaid phytochemicals demonstrate effective antibacterial activity through the anti-adhesion mechanism.

Cite this article as:

Phytochemicals As Uropathognic Escherichia Coli FimH Antagonist: In Vitro And In Silico Approach, Current Molecular Medicine 2018; 18 (9) . https://dx.doi.org/10.2174/1566524019666190104104507