Attenuation of quorum sensing-mediated virulence of Acinetobacter baumannii by Glycyrrhiza glabra flavonoids.

Abstract:

AIM:To develop an alternative quorum quenching therapy against multidrug-resistant Acinetobacter baumannii. METHODS & RESULTS:Activity-guided partially purified fraction (F1) from Glycyrrhiza glabra significantly (p < 0.05) reduced quorum sensing regulated virulence factors of A. baumannii viz. motility, biofilm formation and production of antioxidant enzymes. Mechanistically, F1 downregulated the expression of autoinducer synthase gene, abaI, and consequently reduced (92%) the production of 3-OH-C12-HSL as determined by ESI-MS. Q-TOF and Q-TRAP analyses suggested the presence of flavonoids viz. licoricone, glycyrin and glyzarin as the active ingredients. CONCLUSION:This is the first report on quorum quenching activity of G. glabra linked to its flavonoids that downregulated the expression of abaI and attenuated quorum sensing regulated virulence of A. baumannii.

journal_name

Future Microbiol

journal_title

Future microbiology

authors

Bhargava N,Singh SP,Sharma A,Sharma P,Capalash N

doi

10.2217/fmb.15.107

subject

Has Abstract

pub_date

2015-01-01 00:00:00

pages

1953-68

issue

12

eissn

1746-0913

issn

1746-0921

journal_volume

10

pub_type

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