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Molecules 2014, 19(5), 6583-6596; doi:10.3390/molecules19056583

Berberine Enhances the Antibacterial Activity of Selected Antibiotics against Coagulase-Negative Staphylococcus Strains in Vitro

1
Department and Institute of Microbiology and Virology, School of Pharmacy and Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Katowice, ul. Jagiellońska 4, 41-200 Sosnowiec, Poland
2
Department of Conservative Dentistry with Endodontics, Medical University of Silesia, Katowice, Pl. Akademicki 17, 41-902 Bytom, Poland
3
Department and Institute of Pathology, School of Pharmacy and Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Katowice, ul. Ostrogórska 30, 41-200 Sosnowiec, Poland
*
Author to whom correspondence should be addressed.
Received: 31 March 2014 / Revised: 18 May 2014 / Accepted: 19 May 2014 / Published: 22 May 2014
(This article belongs to the Section Natural Products)
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Abstract

Synergistic interactions between commonly used antibiotics and natural bioactive compounds may exhibit therapeutic benefits in a clinical setting. Berberine, an isoquinoline-type alkaloid isolated from many kinds of medicinal plants, has proven efficacy against a broad spectrum of microorganisms. The aim of the presented work was to assess the antibacterial activity of berberine chloride in light of the effect exerted by common antibiotics on fourteen reference strains of Staphylococccus spp., and to evaluate the magnitude of interactions of berberine with these antistaphylococcal antibiotics. In our study minimum inhibitory concentrations (MIC) of berberine chloride against CoNS ranged from 16 to 512 µg/mL. The most noticeable effects were observed for S. haemolyticus ATCC 29970, S. epidermidis ATCC 12228, S. capitis subsp. capitis ATCC 35661, S. galinarium ATCC 700401, S. hominis subsp. hominis ATCC 27844, S. intermedius ATCC 29663 and S. lugdunensis ATCC 49576. The most significant synergistic effect was noticed for berberine in combination with linezolid, cefoxitin and erythromycin. The synergy between berberine and antibiotics demonstrates the potential application of compound combinations as an efficient, novel therapeutic tool for antibiotic-resistant bacterial infections.
Keywords: antimicrobial activity; coagulase-negative staphylococci (CoNS); berberine antimicrobial activity; coagulase-negative staphylococci (CoNS); berberine
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Wojtyczka, R.D.; Dziedzic, A.; Kępa, M.; Kubina, R.; Kabała-Dzik, A.; Mularz, T.; Idzik, D. Berberine Enhances the Antibacterial Activity of Selected Antibiotics against Coagulase-Negative Staphylococcus Strains in Vitro. Molecules 2014, 19, 6583-6596.

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