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.
机构:
Postgrad Inst Med Educ & Res PGIMER, Dept Med Microbiol, Chandigarh 160012, IndiaPostgrad Inst Med Educ & Res PGIMER, Dept Med Microbiol, Chandigarh 160012, India
Singh, Rachna
Ray, Pallab
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Postgrad Inst Med Educ & Res PGIMER, Dept Med Microbiol, Chandigarh 160012, IndiaPostgrad Inst Med Educ & Res PGIMER, Dept Med Microbiol, Chandigarh 160012, India
机构:
Emory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322 USAEmory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322 USA
Saroj, Sunil D.
Rather, Philip N.
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Emory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322 USA
Atlanta Vet Affairs Med Ctr, Res Serv, Decatur, GA USAEmory Univ, Sch Med, Dept Microbiol & Immunol, Atlanta, GA 30322 USA
机构:
Hebrew Univ Jerusalem, Hadassah Med Ctr, Fac Med Dent, Inst Dent Sci,Biofilm Res Lab, Jerusalem, IsraelHebrew Univ Jerusalem, Hadassah Med Ctr, Fac Med Dent, Inst Dent Sci,Biofilm Res Lab, Jerusalem, Israel
Soni, Divya
Smoum, Reem
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Hebrew Univ Jerusalem, Fac Med, Inst Drug Res, Jerusalem, IsraelHebrew Univ Jerusalem, Hadassah Med Ctr, Fac Med Dent, Inst Dent Sci,Biofilm Res Lab, Jerusalem, Israel
Smoum, Reem
Breuer, Aviva
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Hebrew Univ Jerusalem, Fac Med, Inst Drug Res, Jerusalem, IsraelHebrew Univ Jerusalem, Hadassah Med Ctr, Fac Med Dent, Inst Dent Sci,Biofilm Res Lab, Jerusalem, Israel
Breuer, Aviva
Mechoulam, Raphael
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Hebrew Univ Jerusalem, Fac Med, Inst Drug Res, Jerusalem, IsraelHebrew Univ Jerusalem, Hadassah Med Ctr, Fac Med Dent, Inst Dent Sci,Biofilm Res Lab, Jerusalem, Israel
Mechoulam, Raphael
Steinberg, Doron
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Hebrew Univ Jerusalem, Hadassah Med Ctr, Fac Med Dent, Inst Dent Sci,Biofilm Res Lab, Jerusalem, IsraelHebrew Univ Jerusalem, Hadassah Med Ctr, Fac Med Dent, Inst Dent Sci,Biofilm Res Lab, Jerusalem, Israel