scholarly journals Phenolic Compounds in Leaves of Alchornea Triplinervia: Anatomical Localization, Mutagenicity, and Antibacterial Activity

2010 ◽  
Vol 5 (8) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Tamara R. Calvo ◽  
Diego Demarco ◽  
Fabio V. Santos ◽  
Helen P. Moraes ◽  
Taís M. Bauab ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Phenolic Compounds ◽  
Methanolic Extract ◽  
Chloroform Extract ◽  
Methyl Gallate ◽  
Phytochemical Investigation ◽  
Anatomical Localization

Phenolic compounds are produced by secretory idioblasts and hypodermis, and by specialized cells of the epidermis and chlorenchyma of leaves of Alchornea triplinervia. Phytochemical investigation of these leaves led to the isolation of the known substances quercetin, quercetin-7- O-β-D-ghicopyranoside, quercetin-3- O-β-D-glucopyranoside, quercetin-3- O-β-D-galactopyranoside, quercetin-3- O-α-L-arabinopyranoside, amentoflavone, brevifolin carboxylic acid, gallic acid, and methyl gallate from the methanolic extract, and stigmasterol, campesterol, sitosterol, lupeol, friedelan-3-ol, and friedelan-3-one from the chloroform extract. In studies of antibacterial activity and mutagenicity, the methanolic extract showed promising activity against Staphylococcus aureus (MIC=62.5 μg/mL) and was slightly mutagenic in vitro and in vivo at the highest concentrations tested (1335 mg/kg b.w.).

scholarly journals Phenolic Compounds Diminish Antibiotic Resistance of Staphylococcus Aureus Clinical Strains

2018 ◽  
Vol 15 (10) ◽  
pp. 2321 ◽  
Author(s):  
Maria Miklasińska-Majdanik ◽  
Małgorzata Kępa ◽  
Robert Wojtyczka ◽  
Danuta Idzik ◽  
Tomasz Wąsik
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Phenolic Compounds ◽  
Mechanisms Of Action ◽  
Bacterial Biofilm ◽  
Resistant Bacteria ◽  
Promising Alternative ◽  
Low Cytotoxicity

There is a growing body of evidence that flavonoids show antibacterial activity against both Gram-positive and Gram-negative bacteria. The mechanisms of action of phenolic compounds on bacterial cell have been partially attributed to damage to the bacterial membrane, inhibition of virulence factors such as enzymes and toxins, and suppression of bacterial biofilm formation. What is more, some natural polyphenols, aside from direct antibacterial activity, exert a synergistic effect when combined with common chemotherapeutics. Many studies have proved that in synergy with antibiotics plant flavonoids pose a promising alternative for therapeutic strategies against drug resistant bacteria. In this review most recent reports on antimicrobial action of polyphenols on Staphylococcus aureus strains are described, highlighting where proven, the mechanisms of action and the structure–activity relationships. Since many reports in this field are, to some extent, conflicting, a unified in vitro and in vivo susceptibility testing algorithms should be introduced to ensure the selection of effective antibacterial polyphenolic compounds with low cytotoxicity and minimal side effects.

scholarly journals In Vitro Antibacterial Effect of the Methanolic Extract of the Korean Soybean Fermented Product Doenjang against Staphylococcus aureus

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2319
Author(s):  
Klara Lalouckova ◽  
Lucie Mala ◽  
Petr Marsik ◽  
Eva Skrivanova
Keyword(s):  
Staphylococcus Aureus ◽  
High Performance ◽  
Methanolic Extract ◽  
Bioactive Substances ◽  
Microdilution Method ◽  
Antibacterial Compound ◽  
Fermented Product ◽  
Broth Microdilution Method

Ultra-high performance liquid chromatography/mass spectrometry showed soyasaponin I and the isoflavones daidzein, genistein, and glycitein to be the main components of the methanolic extract of the Korean soybean fermented product doenjang, which is known to be a rich source of naturally occurring bioactive substances, at average contents of 515.40, 236.30, 131.23, and 29.00 ng/mg, respectively. The antimicrobial activity of the methanolic extract of doenjang against nine Staphylococcusaureus strains was determined in vitro by the broth microdilution method to investigate its potential to serve as an alternative antibacterial compound. The results suggest that the extract is an effective antistaphylococcal agent at concentrations of 2048–4096 µg/mL. Moreover, the tested extract also showed the ability to inhibit the growth of both methicillin-sensitive and methicillin-resistant animal and clinical S. aureus isolates. The growth kinetics of the chosen strains of S. aureus at the minimum inhibitory concentration of the methanolic extract of doenjang support the idea that the tested extract acts as an antibacterial compound. To the best of our knowledge, this is the first report on the antistaphylococcal action of the methanolic extract of doenjang thus, additional studies including in vivo testing are necessary to confirm this hypothesis.

scholarly journals Jabuticaba skin extracts: phenolic compounds and antibacterial activity

2018 ◽  
Vol 21 (0) ◽  
Author(s):  
Flávia Cíntia de Oliveira ◽  
Tamara Rezende Marques ◽  
Gustavo Henrique Andrade Machado ◽  
Thaís Cristina Lima de Carvalho ◽  
Aline Aparecida Caetano ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Listeria Monocytogenes ◽  
Phenolic Compounds ◽  
Methanolic Extract ◽  
Ethanolic Extract ◽  
Salmonella Choleraesuis ◽  
Pharmaceutical Industries

Abstract The phenolic compounds from various extracts of jabuticaba skin powder (JSP) were characterized in this study, and the antibacterial activity assessed. The phenolic compounds were extracted from the JSP using four methods: a) acetone extraction - 1 g JSP: 10 mL 70% acetone, resting for 2 hours; b) aqueous extract - 1 g JSP: 15 mL water, under agitation; c) ethanolic extract - 1 g JSP: 15 mL acidified ethanol, under agitation; and d) methanolic extract - 1 g JSP: 50 mL 50% methanol, under reflux. The antibacterial activity was evaluated by the agar diffusion assay, using Escherichia coli ATCC 11229, Salmonella choleraesuis ATCC 6539, Pseudomonas aeruginosa ATCC 15442, Staphylococcus aureus ATCC 6538 and Listeria monocytogenes ATCC 19117. The ethanolic and methanolic extracts showed the highest levels of phenolic compounds, especially of cyanidin chloride, catechin and epicatechin. The extracts did not inhibit the growth of Escherichia coli and Salmonella choleraesuis, but inhibited 30% of the growth of Pseudomonas aeruginosa with an extract concentration of 250 µg mL-1. Against Staphylococcus aureus and Listeria monocytogenes the highest inhibitory effect observed was 41.8% for the ethanolic extract, followed by 36% inhibition by the methanolic extract, thus revealing the potential of these extracts as possible alternatives for use in the food and/or pharmaceutical industries.

scholarly journals In vitro and in vivo evaluation of antibacterial activity of Bridelia ferruginea extracts on some clinical isolates

2018 ◽  
Vol 7 (4) ◽  
pp. 392-398
Author(s):  
B.T Yunana ◽  
◽  
B. B Bukar ◽  
J. C Aguiyi ◽  
◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Bark Extract ◽  
Root Extract ◽  
Root Bark ◽  
Zone Of Inhibition ◽  
Bridelia Ferruginea

The ethanol extracts of root, bark and leaf of Bridelia ferruginea was investigated for antibacterial activity against clinical isolate of Staphylococcus aureus and Escherichia coli. The extracts had significant antibacterial activity in vitro at concentration of 25 mg/ml, 50 mg/ml, 100 mg/ml and 200 mg/ml and in vivo at dose of 50 mg/kg and 100 mg/kg. The root extract in vitro had the highest zone of inhibition, followed by the bark extract for both Staphylococcus aureus and Escherichia coli. The concentration of 200 mg/ml had the highest zone of inhibition in vitro. The minimum inhibitory concentration (MIC) showed a decreasing inhibitory effect of the plant extracts for both Staphylococcus aureus and Escherichia coli as the concentration decreases with root having 3.125 mg/ml, bark having 6.25 mg/ml and leaf having 25 mg/ml for Staphylococcus aureus and Escherichia coli. Likewise, the minimum bactericidal concentration (MBC) showed decreasing bactericide effects with decrease concentration with root having 12.5 mg/ml, bark having 12.5 mg/ml and leaf having 25 mg/ml for Escherichia coli while root had 6.25mg/ml, bark had 12.5mg/ml and leaf had 25mg/ml for Staphylococcus aureus. The in vivo investigation showed that the root and bark extract exhibited antibacterial activity on both Staphylococcus aureus and Escherichia coli at doses of 100mg/kg and 50mg/kg; the root extract had higher activity than the bark and root/bark combined. The dose of 100 mg/kg had the highest colonies reduction for Staphylococcus aureus and Escherichia coli in vivo. Preliminary phytochemical screening of root, bark and leaves of Bridelia ferruginea revealed the presence of tannins, flavonoids, carbohydrates, cardiac glycoside (root, bark and leaves), saponins (root and bark). The presence of tannins, saponins, flavonoid, cardiac glycoside and carbohydrate in the bark and root extracts of the plant indicates that the bark and root extracts were pharmacological importance

scholarly journals In VitroandIn VivoAntimalarial Evaluations of Myrtle Extract, a Plant Traditionally Used for Treatment of Parasitic Disorders

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Farzaneh Naghibi ◽  
Somayeh Esmaeili ◽  
Noor Rain Abdullah ◽  
Mehdi Nateghpour ◽  
Mahdieh Taghvai ◽  
...  
Keyword(s):  
Cell Lines ◽  
Mammalian Cell ◽  
Methanolic Extract ◽  
Cytotoxic Activities ◽  
Traditional Use ◽  
Aerial Parts ◽  
Mammalian Cell Lines ◽  
Phytochemical Investigation

Based on the collected ethnobotanical data from the Traditional Medicine and Materia Medica Research Center (TMRC), Iran,Myrtus communisL. (myrtle) was selected for the assessment ofin vitroandin vivoantimalarial and cytotoxic activities. Methanolic extract of myrtle was prepared from the aerial parts and assessed for antiplasmodial activity, using the parasite lactate dehydrogenase (pLDH) assay against chloroquine-resistant (K1) and chloroquine-sensitive (3D7) strains ofPlasmodium falciparum. The 4-day suppressive test was employed to determine the parasitemia suppression of the myrtle extract againstP. berghei  in vivo. The IC50values of myrtle extract were 35.44 µg/ml against K1 and 0.87 µg/ml against 3D7. Myrtle extract showed a significant suppression of parasitaemia (84.8 ± 1.1% at 10 mg/kg/day) in mice infected withP. bergheiafter 4 days of treatment. Cytotoxic activity was carried out against mammalian cell lines using methyl thiazol tetrazolium (MTT) assay. No cytotoxic effect on mammalian cell lines up to 100 µg/mL was shown. The results support the traditional use of myrtle in malaria. Phytochemical investigation and understanding the mechanism of action would be in our upcoming project.

Evaluation of sperm head abnormality traits and anti-bacterial properties of Achillea millefolium methanolic extract on methotrexate induced albino male mice.

2019 ◽  
Vol 9 (o3) ◽  
Author(s):  
Ruqaya Mohammed Al-Ezzy ◽  
Kholood Whayeb Abood ◽  
JasimAya Karim Rdeef/ Departement of Agr Mohammed Abdullah ◽  
Aya Karim Rdeef
Keyword(s):  
Antibacterial Activity ◽  
Methanolic Extract ◽  
Chemical Constituents ◽  
Sperm Head ◽  
Achillea Millefolium ◽  
Male Mice ◽  
Stomach Acid ◽  
Sperm Head Abnormality

Plants have been used by people from prehistoric times to get rid of suffering and curing ailments. Plants are of the important sources of medicine and a large numbers of drugs in use are derived from plants. Yarrow, a member of the aster family, is closely related to chrysanthemums and chamomile. Yarrow (Achillea millefolium) was named after Achilles, the Greek mythical figure who used it to stop the bleeding wounds of his soldiers. Decoctions have been used to treat inflammations, such as hemorrhoids, and headaches. Yarrow contains flavonoids (plant-based chemicals) that increase saliva and stomach acid, helping to improve digestion. Phenolic acids such as caffeic acid and salicylic acid are components of the bioactive compounds present in Achillea millefolium that have anti-inflammatory and anti-bacterial properties. This study was designed to assess the fertility and anti-bacterial activity of Yarrow methanolic extract through in vivo (albino male mice) and in vitro (antibacterial activity) studies. Results indicated that higher doses of plant increased sperm head abnormality and this lead to decrease fertility in addition to that antibacterial activity was dose dependant manner. Conclusions: Yarrow contains flavonoids and other chemical constituents which have these effects.

scholarly journals Antioxidant and Antimutagenic (Anticlastogenic) Activity of Alcoholic Extract of Bauhinia variegata (Linn.) Root

2020 ◽  
pp. 32-39
Author(s):  
Dharmesh K. Golwala ◽  
Santosh Kumar Vaidya ◽  
Kishor K. Dholwani ◽  
Darpini S. Patel ◽  
Satyajit Sahoo
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Alcoholic Extract ◽  
Root Extraction ◽  
Phytochemical Investigation ◽  
Bauhinia Variegata

Aims: Antioxidant and Antimutagenic (Anticlastogenic) activity of alcoholic extract of Bauhinia variegata (Linn.) root. Place: C. U. Shah College of Pharmacy and Research, Wadhwan, Surendranagar, Gujarat, India. Methodology: Shade dried Bauhinia variegata (Linn.) root, extraction was carryout by isolation extract were subjected to primary and secondary Phytochemical investigation. Then In-vitro antioxidant properties were estimated by reducing power and nitric oxide free radical scavenging method. Based on Phytochemical constituent and antioxidant properties In-vivo Antimutagenic (Anticlastogenic) activity was performed. Results: Preliminary phytochemical investigation revealed the presence of carbohydrates, free amino acids, and secondary metabolites like tannins, phenolic compounds and flavonoids, then polyphenol estimation found ALBV contains 86.38% phenolic compounds. In antioxidant properties determination IC50 respectively found 55.27±2.57 µg/ml, 125.52±8.15 µg/ml against of Ascorbic acid and Curcumin. Then In-vivo Antimutagenic (Anticlastogenic) activity ALBV shows significant reeducation in % MNPCE, % MNNCE and P/N ratio at 24 h, 48 h and 72 h against the cyclophosphamide-induced mutagenicity. Conclusion: Therefore, from the present study, it is concluded that alcoholic extract of Bauhinia variegata root (ALBV) can prove to be a very good antioxidant and effective chemopreventive against cyclophosphamide-induced mutagenesis.

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