Antimicrobial efficacy of Syzygium antisepticum plant extract against Staphylococcus aureus and methicillin-resistant S. aureus and its application potential with cooked chicken

Yuan, Wenqian; Yuk, Hyun‐Gyun

doi:10.1016/j.fm.2017.12.002

Cited by 46 publications

(25 citation statements)

References 48 publications

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“…The significant increase of dead cells induced by psychorubrin is in accordance with previous studies, which demonstrated bactericidal activity after treatment with compounds through viability analyses using Baclight ( You et al, 2013 ; Yuan and Yuk, 2018 ). Additionally, the bacteriostatic effect from chloramphenicol ( Bernatová et al, 2013 ), showed a very low proportion of dead cells, statistically different from psychorubrin.…”

Section: Discussionsupporting

confidence: 91%

Antibacterial and Antibiofilm Activities of Psychorubrin, a Pyranonaphthoquinone Isolated From Mitracarpus frigidus (Rubiaceae)

et al. 2018

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Psychorubrin, a natural pyranonaphthoquinone found in different plants, has become an interesting compound in the search for new antimicrobial therapeutic agents. Here, we investigated the potential antagonistic activity of psychorubrin against planktonic and biofilm bacteria. First, psychorubrin was tested against several Gram-positive and Gram-negative bacteria strains by a broth microdilution susceptibility method. Second, bacterial killing assay, bacterial abundance, and membrane viability were evaluated. The nucleotide leakage assay was used to verify membrane destabilization while antibiofilm activities were analyzed by the effect on established biofilm, static biofilm formation, isolation of biofilm matrix assay and scanning electron microscopy. In parallel, the combinatorial effect of psychorubrin and chloramphenicol was evaluated by the checkerboard method. Psychorubrin was active against Gram-positive bacteria, showing rapid time-dependent kinetics of bacterial killing, amplified nucleotide leakage, and greater activity against the methicillin-resistant species (MRSA) Staphylococcus aureus 33591 and 33592 and Staphylococcus pyogenes 10096. Psychorubrin also interfered with the composition of the biofilm matrix by reducing the total content of carbohydrates and proteins. A synergic effect between psychorubrin and chloramphenicol was observed for S. aureus 33592 and S. pyogenes 10096 while an additive effect was detected for S. aureus 33591. Our findings demonstrate, for the first time, an antagonistic activity of psychorubrin against bacteria not only in their planktonic forms but also in biofilms, and identify bacterial membranes as primary targets for this compound. Based on these observations, psychorubrin has a good potential for the design of novel antimicrobial agents.

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Section: Discussionsupporting

confidence: 91%

Antibacterial and Antibiofilm Activities of Psychorubrin, a Pyranonaphthoquinone Isolated From Mitracarpus frigidus (Rubiaceae)

et al. 2018

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“…Many species belonging to the Eugenia and Syzygium genera have been used traditionally to treat different ailments such as diarrhoea, diabetes, reproductive problems, and respiratory conditions [29, 30]. Many studies have reported various pharmacological properties in members of these genera including antimicrobial [31, 32], anti-inflammatory [33], antitumor [34], antioxidant [35] and antidiabetic [36]. Apart from medicinal uses, the plants are commercially explored for their edible fruits, essential oils and for ornamental purposes [31, 37].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial and antibiofilm activity of acetone leaf extracts of nine under-investigated south African Eugenia and Syzygium (Myrtaceae) species and their selectivity indices

Famuyide

Aro

Fasina

et al. 2019

BMC Complement Altern Med

151

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Background Antimicrobial resistance (AMR) remains an important global health issue but the gap between AMR and development of new antimicrobials is increasing. Plant extracts may have good activity per se or may be sources of effective antimicrobial compounds which can act against planktonic and/or biofilms of pathogens. We determined the antimicrobial efficacy and cytotoxicity of some under-investigated plants from the Myrtaceae family endemic to South Africa. The ability of the plant extracts to inhibit or destroy pre-formed bacterial biofilms was also determined. Methods Based on previous preliminary in vitro screening and on chemotaxonomy, nine species from the Myrtaceae family were selected. The antimicrobial activity of the crude acetone leaf extracts was determined against six common nosocomial pathogens, namely: Gram-positive bacteria ( Bacillus cereus , Enterococcus faecalis , Staphylococcus aureus ), Gram-negative bacteria ( Escherichia coli , Pseudomonas aeruginosa , Salmonella Typhimurium) using a two-fold serial microdilution assay with p-iodonitrotetrazolium violet as growth indicator. The number of antimicrobial compounds present in extracts was determined by bioautography. Cytotoxicity of extracts was determined against Vero kidney cells using a colorimetric tetrazolium-based assay. The total antibacterial activity (TAA) in ml/g and selectivity index (LC 50 /MIC) of the plant extracts were calculated. A modified crystal violet assay was used to determine the antibiofilm activity of the extracts. Results Syzygium legatii , Syzygium masukuense , and Syzygium species A had the best activities against Gram-negative and Gram-positive bacteria (MIC) values ranging from 0.04–0.08 mg/ml. Eugenia erythrophylla had the best MIC (0.02 mg/ml) against Bacillus cereus . Many extracts had relatively low cytotoxicity (LC 50 > 20 μg/ml) leading to reasonable selectivity indices. Three leaf extracts ( Syzygium masukuense , Syzygium species A, and Eugenia natalitia ) were moderately cytotoxic (20 μg/ml < LC 50 < 100 μg/ml). The plant extracts had a good capacity to reduce biofilm formation and good to poor potential to destroy pre-formed biofilms. Conclusions The plant species examined in this study had varying degrees of antibacterial activity against bacterial planktonic and biofilm forms with some having good activity against both forms. Several of these selected species may be potential candidates for further investigation to isolate antimicrobial compounds and to determ...

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“…Numerous active components have been identified in Yerba Mate. Some of them are antioxidant (Boaventura et al, ; Mateos, Baeza, Sarriá, & Bravo, ), anti‐obesity (Alkhatib, ; Arçari, Santos, Gambero, & Ribeiro, ), antidiabetic (Kang et al, ), neuroprotective (Santos et al, ), vasodilatory (Pontilho et al, ), anti‐mutagenic (Bracesco et al, ), anti‐glycation effects, increasing of energy, antimicrobial (Yuan & Yuk, ), and anti‐inflammatory (Luz et al, ).…”

Section: Introductionmentioning

confidence: 99%

Development of a preliminary sensory lexicon for mate tea

Godoy

Chambers

Yang

2020

Journal of Sensory Studies

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A Lexicon was developed for yerba mate tea including attributes, definitions, and references to describe the color, aroma, and flavor. A highly trained panel generated 39 attributes and evaluated 18 samples of tea. Some attributes such as smoky, woody, straw-like, ashy, astringent, bitter, sweet aromatics, musty dusty, and dark green were present in most of the samples. Other characteristics such as green, floral, spice brown, and petroleum-like appeared in less than 50% of the samples. The sensory profile of mate tea was complex but differed for various teas. This terminology can be useful for manufacturers, producers, and consumers and helpful for the standardization of mate tea. Practical applicationThe development of a sensory lexicon for mate tea can be helpful for the entire mate tea chain from grower to producer to consumer. Such a lexicon aids researcher in breeding programs for Yerba Mate, can help crop managers producing mate tea with the desired characteristics; assists manufacturers in differentiating products, categorizing and selecting of raw material, optimizing processes and developing new products;and can ensure consumers they are getting a consisted, expected product. Such data are critical for use in sensory studies where descriptive data are related to consumer preferences and for conducting studies in different, labs, regions, and countries.

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Antimicrobial efficacy of Syzygium antisepticum plant extract against Staphylococcus aureus and methicillin-resistant S. aureus and its application potential with cooked chicken

Cited by 46 publications

References 48 publications

Antibacterial and Antibiofilm Activities of Psychorubrin, a Pyranonaphthoquinone Isolated From Mitracarpus frigidus (Rubiaceae)

Antibacterial and Antibiofilm Activities of Psychorubrin, a Pyranonaphthoquinone Isolated From Mitracarpus frigidus (Rubiaceae)

Antibacterial and antibiofilm activity of acetone leaf extracts of nine under-investigated south African Eugenia and Syzygium (Myrtaceae) species and their selectivity indices

Development of a preliminary sensory lexicon for mate tea

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