Tristemma hirtumand Five Other Cameroonian Edible Plants with Weak or No Antibacterial Effects Modulate the Activities of Antibiotics against Gram-Negative Multidrug-Resistant Phenotypes

Author:

Nguenang Gaëlle S.1,Mbaveng Armelle T.1ORCID,Fankam Aimé G.1,Manekeng Hermione T.1,Nayim Paul1,Wamba Brice E. N.1,Kuete Victor1ORCID

Affiliation:

1. Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon

Abstract

In order to contribute to the fight against infectious diseases, thein vitroantibacterial activity and the antibiotic-potentiating effects ofTristemma hirtumand five other Cameroonian edible plants have been evaluated against Gram-negative multidrug-resistant (MDR) phenotypes. The microdilution method was used to evaluate the bacterial susceptibility of the extracts and their combination to common antibiotics. The phytochemical screening of the extracts was carried out according to standard methods. Phytochemical analysis of the extracts revealed the presence of alkaloids, triterpenes, steroids, and polyphenols, including flavonoids in most of the tested extracts. The entire tested extracts showed moderate (512 μg/mL ≤ MIC ≤ 2048 μg/mL) to weak (MIC > 2048 μg/mL) antibacterial activities against the tested bacteria. Furthermore, extracts of leaf ofTristemma hirtumand pericarpsofRaphia hookeri(at their MIC/2 and MIC/4) strongly potentiated the activities of all antibiotics used in the study, especially those of chloramphenicol (CHL), ciprofloxacin (CIP), kanamycin (KAN), and tetracycline (TET) against 70% (7/10) to 100% (10/10) of the tested MDR bacteria, with the modulating factors ranging from 2 to 128. The results of this study suggest that extracts from leaves ofTristemma hirtumand pericarps ofRaphia hookerican be sources of plant-derived products with antibiotic modifying activity.

Publisher

Hindawi Limited

Subject

General Environmental Science,General Biochemistry, Genetics and Molecular Biology,General Medicine

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