The synergy and mode of action of quercetin plus amoxicillin against amoxicillin-resistant Staphylococcus epidermidis

Siriwong, Supatcharee; Teethaisong, Yothin; Thumanu, Kanjana; Dunkhunthod, Benjawan; Eumkeb, Griangsak

doi:10.1186/s40360-016-0083-8

Cited by 79 publications

(35 citation statements)

References 45 publications

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“…epidermidis were assessed. The results indicated that upon combination of quercetin and amoxicillin, the synergistic activity was observed and bacterial resistance to this traditional antibiotic was remarkably reversed (Siriwong, Teethaisong, Thumanu, Dunkhunthod, & Eumkeb, ).…”

Section: Antibacterial Activity Of Flavonoidsmentioning

confidence: 99%

Antibacterial activity of flavonoids and their structure–activity relationship: An update review

Farhadi

Khameneh

Iranshahi

et al. 2018

Phytotherapy Research

390

249

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Based on World Health Organization reports, resistance of bacteria to well-known antibiotics is a major global health challenge now and in the future. Different strategies have been proposed to tackle this problem including inhibition of multidrug resistance pumps and biofilm formation in bacteria and development of new antibiotics with novel mechanism of action. Flavonoids are a large class of natural compounds, have been extensively studied for their antibacterial activity, and more than 150 articles have been published on this topic since 2005. Over the past decade, some promising results were obtained with the antibacterial activity of flavonoids. In some cases, flavonoids (especially chalcones) showed up to sixfold stronger antibacterial activities than standard drugs in the market. Some synthetic derivatives of flavonoids also exhibited remarkable antibacterial activities with 20-to 80-fold more potent activity than the standard drug against multidrug-resistant Gram-negative and Gram-positive bacteria (including Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus). This review summarizes the ever changing information on antibacterial activity of flavonoids since 2005, with a special focus on the structure-activity relationship and mechanisms of actions of this broad class of natural compounds.

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Section: Antibacterial Activity Of Flavonoidsmentioning

confidence: 99%

Antibacterial activity of flavonoids and their structure–activity relationship: An update review

Farhadi

Khameneh

Iranshahi

et al. 2018

Phytotherapy Research

390

249

View full text Add to dashboard Cite

show abstract

“…[ 155 ] There is already evidence for the enhancement of conventional antibiotics by acting synergistically with plant-derived compounds. The combination of β-lactams with a-mangostin isolated from mangosteen fruit,[ 156 157 ] or with quercetin or kaempferol from various fruits, vegetables, and grains,[ 158 ] substantially increase the efficacy of the therapy in β-lactam resistant bacterial strains. It is likely that the mangosteen derived components of these combinations may inhibit the bacterial β-lactamase enzyme, thus reactivating the antibiotic.…”

Section: Combinational Antimicrobial Chemotherapiesmentioning

confidence: 99%

Developing new antimicrobial therapies: Are synergistic combinations of plant extracts/compounds with conventional antibiotics the solution?

Cheesman¹,

Ilanko²,

Blonk³

et al. 2017

Phcog Rev

321

144

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The discovery of penicillin nearly 90 years ago revolutionized the treatment of bacterial disease. Since that time, numerous other antibiotics have been discovered from bacteria and fungi, or developed by chemical synthesis and have become effective chemotherapeutic options. However, the misuse of antibiotics has lessened the efficacy of many commonly used antibiotics. The emergence of resistant strains of bacteria has seriously limited our ability to treat bacterial illness, and new antibiotics are desperately needed. Since the discovery of penicillin, most antibiotic development has focused on the discovery of new antibiotics derived from microbial sources, or on the synthesis of new compounds using existing antibiotic scaffolds to the detriment of other lines of discovery. Both of these methods have been fruitful. However, for a number of reasons discussed in this review, these strategies are unlikely to provide the same wealth of new antibiotics in the future. Indeed, the number of newly developed antibiotics has decreased dramatically in recent years. Instead, a reexamination of traditional medicines has become more common and has already provided several new antibiotics. Traditional medicine plants are likely to provide further new antibiotics in the future. However, the use of plant extracts or pure natural compounds in combination with conventional antibiotics may hold greater promise for rapidly providing affordable treatment options. Indeed, some combinational antibiotic therapies are already clinically available. This study reviews the recent literature on combinational antibiotic therapies to highlight their potential and to guide future research in this field.

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“…There has been significant recent interest in combination therapy, combinations of antibiotics with other antibiotics, peptides and plant extracts, to increase antibiotic efficacy [19,20].…”

Section: Assessment Of Antibiotic Interactions Showed That Honey Was mentioning

confidence: 99%

Antibacterial and Antivirulence Activity of Manuka Honey against Genetically Diverse Staphylococcus pseudintermedius Strains

Brown

Metters

Hitchings

et al. 2020

Appl Environ Microbiol

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Staphylococcus pseudintermedius causes opportunistic infections in dogs. It also has significant zoonotic potential, with the emergence of multidrug-resistance leading to difficulty treating both animal and human infections. Manuka honey has previously been reported to inhibit many bacterial pathogens including methicillin resistant Staphylococcus aureus and is successfully utilised in both clinical and veterinary practice. Here we evaluated the ability of manuka honey to inhibit strains of S. pseudintermedius growth alone and in combination with antibiotics, and its capacity to modulate virulence within multiple S. pseudintermedius. All 18 of the genetically diverse S. pseudintermedius strains sequenced and tested were inhibited by ≤ 12% (w/v) medical grade manuka honey, although tolerance to five clinically relevant antibiotics was observed. The susceptibility of the isolates to four of these antibiotics was significantly increased (p ≤0.05) when combined with sub lethal concentrations of honey, although sensitivity to oxacillin was decreased. Virulence (DNase, protease and haemolysin) activity was also significantly reduced (p ≤ 0.05) in over half of isolates when cultured with sub lethal concentrations of honey (13, 9 and 10 isolates respectively). These findings highlight the potential for manuka honey to be utilised against S. pseudintermedius infections. Importance Staphylococcus pseudintermedius is an important member of the skin microbial community in animals and can cause opportunistic infections in both pets and their owners. The high incidence of antimicrobial resistance in S. pseudintermedius highlights that this opportunistic zoonotic pathogen can cause infections which require prolonged and intensive treatment to resolve. Manuka honey has proven efficacy against many bacterial pathogens and is an accepted topical treatment for infections in both veterinary and clinical practice so is a particularly appropriate antimicrobial for use with zoonotic pathogens such as S. pseudintermedius. Here we demonstrate that manuka honey is not only highly potent against novel multi-drug resistant S. pseudintermedius isolates, but also acts synergistically with clinically relevant antibiotics. In addition, manuka honey modulates S. pseudintermedius virulence activity, even at subinhibitory concentrations. In a clinical setting these attributes may assist in controlling infection, allowing a more rapid resolution and reducing antibiotic use.

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The synergy and mode of action of quercetin plus amoxicillin against amoxicillin-resistant Staphylococcus epidermidis

Cited by 79 publications

References 45 publications

Antibacterial activity of flavonoids and their structure–activity relationship: An update review

Antibacterial activity of flavonoids and their structure–activity relationship: An update review

Developing new antimicrobial therapies: Are synergistic combinations of plant extracts/compounds with conventional antibiotics the solution?

Antibacterial and Antivirulence Activity of Manuka Honey against Genetically Diverse Staphylococcus pseudintermedius Strains

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