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Infectious Disorders - Drug Targets

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ISSN (Print): 1871-5265
ISSN (Online): 2212-3989

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Research Article

The Anti-infective Potential of Hydroalcoholic Extract of Phyllanthus emblica Seeds Against Selected Human-pathogenic Bacteria

Author(s): Pooja Patel, Chinmayi Joshi and Vijay Kothari*

Volume 20, Issue 5, 2020

Page: [672 - 692] Pages: 21

DOI: 10.2174/1871526519666190821154926

Price: $65

Abstract

Introduction: In the context of the global threat of antimicrobial resistance (AMR) among bacterial pathogens against conventional bactericidal antibiotics, investigation on complementary/ alternative approaches to manage bacterial infections is warranted. The present study aimed at investigating the anti-pathogenic potential of Phyllanthus emblica seed extract (PESE) against four different pathogenic bacteria.

Methods: Hydroalcoholic extract of P. emblica seeds was tested for its possible in vitro quorummodulatory potential against Chromobacterium violaceum, Serratia marcescens, Pseudomonas aeruginosa, and Staphylococcus aureus through broth dilution assay. In vivo efficacy of PESE was assayed employing Caenorhabditis elegans as the model host for these four pathogens.

Results: PESE was found to exert in vitro quorum-modulatory effect on C. violaceum, S. marcescens, P. aeruginosa, and S. aureus at ≥50 μg/mL. This extract could curb the haemolytic activity of all the four test bacteria by 23-65%, inhibit biofilm formation, and was also able to modulate their antibiotic susceptibility (AS) and catalase activity. Susceptibility of P. aeruginosa and S. aureus to lysis by human serum was enhanced under the influence of this extract by 23% and 49%, respectively. Repeated exposure of both these notorious pathogens to PESE did not induce resistance in them. In vivo assay confirmed the anti-virulence effect of this extract in the C. elegans host, wherein the nematode host challenged with the PESE-treated pathogenic bacteria scored better survival. PESE also displayed notable prebiotic potential by promoting the growth of three probiotic strains.

Conclusion: To the best of our awareness, this is the first report on the quorum-modulatory potential of P. emblica seed extract, validating its anti-infective potential and prebiotic property.

Keywords: Antimicrobial resistance (AMR), antibiotic susceptibility (AS), biofilm, post extract effect (PEE), quorum sensing (QS), hydroalcoholic extract, P. emblica.

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