Article Publish Status: FREE
Abstract Title:

Inhibition of Bacterial Efflux Pumps by Crude Extracts and Essential Oil fromHoutt. (Nutmeg) Seeds against Methicillin-Resistant.

Abstract Source:

Molecules. 2021 Jul 31 ;26(15). Epub 2021 Jul 31. PMID: 34361815

Abstract Author(s):

Thidar Oo, Bhanubong Saiboonjan, Sukanya Srijampa, Arpasiri Srisrattakarn, Khaetthareeya Sutthanut, Ratree Tavichakorntrakool, Aroonwadee Chanawong, Aroonlug Lulitanond, Patcharaporn Tippayawat

Article Affiliation:

Thidar Oo


Houtt. (Nutmeg) is a widely known folk medicine across several parts of Asia, particularly used in antimicrobial treatment. Bacterial resistance involves the expression of efflux pump systems (chromosomalA andA) in methicillin-resistant(MRSA). Crude extract (CE) and essential oil (EO) obtained from nutmeg were applied as efflux pump inhibitors (EPIs), thereby enhancing the antimicrobial activity of the drugs they were used in. The major substances in CE and EO, which function as EPIs, in a descending order of % peak area include elemicin, myristicin, methoxyeugenol, myristicin, and asarone. Here, we investigated whether the low amount of CE and EO used as EPIs was sufficient to sensitize MRSA killing using the antibiotic ciprofloxacin, which acts as an efflux system. Interestingly, synergy between ciprofloxacin and CE or EO revealed the most significant viability of MRSA, depending onA andA, the latter being responsible for EPI function of EO. Therefore, CE and EO obtained from nutmeg can act as EPIs in combination with substances that act as efflux systems, thereby ensuring that the MRSA strain is susceptible to antibiotic treatment.

Study Type : In Vitro Study

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Sayer Ji
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