scholarly journals Inhibitory effects of siwak (Salvadora persica. L) extract on the growth of Enterococcus faecalis planktonics and biofilms by in vitro

2016 ◽  
Vol 49 (3) ◽  
pp. 158
Author(s):  
Ika Rhisty Cendana Sari ◽  
Rini Devijanti Ridwan ◽  
Diah Savitri Ernawati
Keyword(s):  
Enterococcus Faecalis ◽  
Inhibitory Concentration ◽  
Secondary Infection ◽  
Surface Protein ◽  
Extracellular Polysaccharide ◽  
Assay Method ◽  
Inhibitory Effects ◽  
Active Components ◽  
Salvadora Persica

Background: Enterococcus faecalis (E. faecalis) is one of the most persistent gram positive bacteria in root canal, resulting in secondary infection after endodontic treatment. E. faecalis pathogenicity is caused by overgrowth of E. faecalis planktonics and biofilms. E. faecalis planktonics produce lipoteichoid acid (LTA) as a virulence factor that can defend their permeability cell. On the other hand, E. faecalis biofilms produce protease, such as Esp (enterococcal surface protein), GelE (gelatinase), and SprE (serin protease), that have quorum-sensing mechanism as an adhesion factor to form extracellular polysaccharide substance (EPS) and increase the growth of the biofilms themselves. Siwak (Salvadora persica L.) has active components, namely benzylisothio-cyanate, trimethylamine, and salvadorine that can inhibit the growth of E. faecalis planktonics and biofilms. Purpose: This study aimed to measure inhibitory effects of siwak extract on the growth of E. faecalis planktonics and biofilms. Method: This research was an antimicrobial research on the culture of E.faecalis incubated in a TSB medium. Siwak extract was diluted into different concentrations, namely 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, and 100%. The extract then was placed into the E. faecalis’s colony and planted into Trypticase Soy Agar medium. After incubated for 24 hours at 37°C, the colony would be measured and compared with the control (+) and control (-). As an antibiofilm research, this research used biofilm microtitter assay method to form E. faecalis biofilms incubated in a well-plate medium containing TSB and 0.1 % glucose. Siwak extract then was diluted into the same range concentration as in first method, and placed into the colony of E. faecalis to form biofilms. The biofilms were measured and compared to the control (+) given siwak extract and the control (-) given 0.1% chlorhexidine. After the incubation, they were washed three times, and staining process was conducted using Chrystal violet. The optical density then was measured by ELISA Reader 595 nm. Result: Siwak extract could inhibit the growth of E. faecalis planktonics at the concentration of 35% as a minimum inhibitory concentration as well as the growth of E. faecalis biofilms at the concentration of 45% as a minimum biofilm inhibitory concentration. Conclusion: Siwak extract has an inhibitory effect, particularly at a concentration of 35% on the growth of E. faecalis planktonics and at the concentration of 45% on the growth of E. faecalis biofilms.

scholarly journals Synergistic Effect of Plant Extracts on Endodontic Pathogens Isolated from Teeth with Root Canal Treatment Failure: An In Vitro Study

Antibiotics ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 552
Author(s):  
Suraj Arora ◽  
Shahabe Saquib ◽  
Youssef Algarni ◽  
Mohammed Kader ◽  
Irfan Ahmad ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Candida Albicans ◽  
Synergistic Effect ◽  
Enterococcus Faecalis ◽  
Plant Extracts ◽  
Azadirachta Indica ◽  
Inhibitory Concentration ◽  
Pathogenic Microorganisms ◽  
Salvadora Persica ◽  
Actinomyces Naeslundii

Background and objectives: This study aimed to evaluate the synergistic antimicrobial activity of extracts obtained from Salvadora persica (Miswak), Commiphora molmol (myrrh) and Azadirachta indica (neem) in combination with commercially available antimicrobial agents: penicillin, tetracycline, ofloxacin and fluconazole on endodontic pathogens such as Enterococcus faecalis, Streptococcus mitis, Actinomyces naeslundii and Candida albicans. Materials and Methods: Microbiological samples from the root canals of the teeth undergoing retreatment were taken using sterile paper points kept at full length in the canal for 30 seconds. The disc diffusion method was used to check the susceptibility of microbes to the plant extracts and antimicrobials by measuring the diameter of the inhibition zones. Against the microbes, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC)/minimum fungicidal concentration (MFC) of the plant extracts were assessed. The fractional inhibitory concentration index (FICI) was used to estimate the synergistic effect of plant extracts combined with antimicrobials against the resistant endodontic microbes. Results: The findings clearly indicate the effectiveness of all the three plant extracts, Commiphora molmol, Azadirachta indica, Salvadora persica, against all the experimental pathogenic microorganisms except for the ineffectiveness of Azadirachta indica, Salvadora persica against Candida albicans. Maximum antimicrobial activity was displayed by Azadirachta indica against Enterococcus faecalis (MIC = 0.09 ± 1.2 mg/mL, MBC = 0.78 ± 1.25 mg/mL) and the minimum antimicrobial activity was displayed by Commiphora molmol against Actinomyces naeslundii (MIC = 12.5 ± 3.25 mg/mL, MBC = 100 ± 3.75 mg/mL). The best synergy was displayed by Commiphora molmol with fluconazole against Candida albicans (FICI = 0.45). Conclusions: The current study delineates the variable antimicrobial activity of plant extracts against the experimental endodontic pathogenic microorganisms. Plant extracts in conjunction with various antimicrobials can be valuable aids in combating relatively resistant endodontic microorganisms that have been the cause of worry in recent years, leading to failure even in treatment procedures following all required protocols.

scholarly journals In Vitro α-Glucosidase and α-Amylase Inhibitory Activities of Free and Bound Phenolic Extracts from the Bran and Kernel Fractions of Five Sorghum Grain Genotypes

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1301
Author(s):  
Yun Xiong ◽  
Ken Ng ◽  
Pangzhen Zhang ◽  
Robyn Dorothy Warner ◽  
Shuibao Shen ◽  
...  
Keyword(s):  
Digestive System ◽  
Inhibitory Concentration ◽  
Inhibitory Effect ◽  
Inhibitory Effects ◽  
Phenolic Contents ◽  
Inhibitory Activities ◽  
Sorghum Grain ◽  
Global Health Challenge ◽  
Phenolic Extracts

Diabetes is a global health challenge. Currently, an effective treatment for diabetes is to reduce the postprandial hyperglycaemia by inhibiting the carbohydrate hydrolysing enzymes in the digestive system. In this study, we investigated the in vitro α-glucosidase and α-amylase inhibitory effects of free and bound phenolic extracts, from the bran and kernel fractions of five sorghum grain genotypes. The results showed that the inhibitory effect of sorghum phenolic extracts depended on the phenolic concentration and composition. Sorghum with higher phenolic contents generally had higher inhibitory activity. Among the tested extracts, the brown sorghum (IS131C)-bran-free extract (BR-bran-free, half-maximal inhibitory concentration (IC50) = 18 ± 11 mg sorghum/mL) showed the strongest inhibition against α-glucosidase which was comparable to that of acarbose (IC50 = 1.39 ± 0.23 mg acarbose/mL). The red sorghum (Mr-Buster)-kernel-bound extract (RM-kernel-bound, IC50 = 160 ± 12 mg sorghum/mL) was the most potent in inhibiting α-amylase but was much weaker compared to acarbose (IC50 = 0.50 ± 0.03 mg acarbose/mL).

scholarly journals Antimicrobial Efficacy of Fruit Peels Eco-Enzyme against Enterococcus faecalis: An In Vitro Study

2020 ◽  
Vol 17 (14) ◽  
pp. 5107
Author(s):  
Hetal Ashvin Kumar Mavani ◽  
In Meei Tew ◽  
Lishen Wong ◽  
Hsu Zenn Yew ◽  
Alida Mahyuddin ◽  
...  
Keyword(s):  
Enterococcus Faecalis ◽  
Inhibitory Concentration ◽  
Antimicrobial Properties ◽  
In Vitro Study ◽  
Antimicrobial Effect ◽  
Antimicrobial Efficacy ◽  
Significant Difference ◽  
Potential Alternative ◽  
The One

Sodium hypochlorite (NaOCl), an effective endodontic irrigant against Enterococcus faecalis (EF), is harmful to periapical tissues. Natural pineapple-orange eco-enzymes (M-EE) and papaya eco-enzyme (P-EE) could be potential alternatives. This study aimed to assess the antimicrobial efficacy of M-EE and P-EE at different concentrations and fermentation periods against EF, compared to 2.5% NaOCl. Fermented M-EE and P-EE (3 and 6 months) at various concentrations were mixed with EF in a 96-well plate incubated for 24 h anaerobically. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of M-EE and P-EE were determined via EF growth observation. EF inhibition was quantitatively measured and compared between different irrigants using the one-way analysis of variance (ANOVA), and different fermentation periods using the independent-samples T-test. M-EE and P-EE showed MIC at 50% and MBC at 100% concentrations. There was no significant difference in antimicrobial effect when comparing M-EE and P-EE at 50% and 100% to 2.5% NaOCl. P-EE at 6 months fermentation exhibited higher EF inhibition compared to 3 months at concentrations of 25% (p = 0.017) and 0.78% (p = 0.009). The antimicrobial properties of M-EE and P-EE, at both 100% and 50% concentrations, are comparable to 2.5% NaOCl. They could therefore be potential alternative endodontic irrigants, but further studies are required.

scholarly journals Antibodies to a Surface-Exposed, N-terminal Domain of Aggregation Substance Are Not Protective in the Rabbit Model of Enterococcus faecalis Infective Endocarditis

2001 ◽  
Vol 69 (5) ◽  
pp. 3305-3314 ◽  
Author(s):  
John K. McCormick ◽  
Helmut Hirt ◽  
Christopher M. Waters ◽  
Timothy J. Tripp ◽  
Gary M. Dunny ◽  
...  
Keyword(s):  
Infective Endocarditis ◽  
Enterococcus Faecalis ◽  
Rabbit Model ◽  
Surface Protein ◽  
Conjugative Plasmid ◽  
Aggregation Substance ◽  
Exposed Region ◽  
Correct Sequence

ABSTRACT The aggregation substance (AS) surface protein fromEnterococcus faecalis has been implicated as an important virulence factor for the development of infective endocarditis. To evaluate the role of antibodies specific for Asc10 (the AS protein from the conjugative plasmid pCF10) in protective immunity to infective endocarditis, an N-terminal region of Asc10 lacking the signal peptide and predicted to be surface exposed (amino acids 44 to 331; AS44–331) was cloned with a C-terminal histidine tag translational fusion and expressed fromEscherichia coli. N-terminal amino acid sequencing of the purified protein revealed the correct sequence, and rabbit polyclonal antisera raised against AS44–331 reacted specifically to Asc10 expressed from E. faecalis OG1SSp, but not to other proteins as judged by Western blot analysis. Using these antisera, flow cytometry analysis demonstrated that antibodies to AS44–331 bound to a surface-exposed region of Asc10. Furthermore, antibodies specific for AS44–331were opsonic for E. faecalis expressing Asc10 in vitro but not for cells that did not express Asc10. New Zealand White rabbits immunized with AS44–331 were challenged intravenously withE. faecalis cells constitutively expressing Asc10 in the rabbit model of experimental endocarditis. Highly immune animals did not show significant differences in clearance of organisms from the blood or spleen or in formation of vegetations on the aortic valve, in comparison with nonimmune animals. Although in vivo expression of Asc10 was demonstrated by immunohistochemistry, these experiments provide evidence that immunity to Asc10 does not play a role in protection from experimental infective endocarditis due toE. faecalis and may have important implications for the development of immunological approaches to combat enterococcal endocarditis.

Inhibitory Effects of Active Fraction and Its Main Components of Shaofu Zhuyu Decoction on Uterus Contraction

2010 ◽  
Vol 38 (04) ◽  
pp. 777-787 ◽  
Author(s):  
Shulan Su ◽  
Yongqing Hua ◽  
Jin-Ao Duan ◽  
Wei Zhou ◽  
Erxin Shang ◽  
...  
Keyword(s):  
Ferulic Acid ◽  
Vanillic Acid ◽  
Uterine Contraction ◽  
Active Fraction ◽  
Inhibitory Effects ◽  
Active Components ◽  
Traditional Use ◽  
Pregnant Mice ◽  
Main Components

Shaofu Zhuyu decoction is a famous formula for treating primary dysmenorrhea in China since the Qing dynasty. In this paper, the inhibitory effects of active-guided fraction and its main bioactive components of Shaofu Zhuyu decoction on a model of non-pregnant mice uterine contraction induced by oxytocin in vitro were investigated. Qualitative and quantitative chemical analyses were used to correlate the chemical composition of active fraction with the spasmolytic effects. Seven ingredients in the active fraction were identified and quantified by HPLC-DAD. Three ingredients, ferulic acid, vanillic acid, and typhaneoside, were evaluated for their effects on mice isolated uterine contraction induced by oxytocin in vitro. The ED50 of them were 63.0 μg/ml, 57.6 μg/ml, 109.7 μg/ml, respectively. Furthermore, the inhibitory activity of the combination of these three compounds was prior to the fraction and seven compounds group. The ED50 was 65.5 μg/ml. The data stated that ferulic acid, vanillic acid, and typhaneoside were possibly the main active components in the bioactive fraction of Shaofu Zhuyu decoction. The study also implied that Shaofu Zhuyu decoction may have direct inhibitory effects on the contractility of the mice uterus and justified the traditional use of the prescription for treating the uterine cramping associated dysmenorrhea.

scholarly journals Quantitative standardization of pharmacologically active components from antiplasmodial plant Solanum nudum Dunal (wild and in vitro)

2022 ◽  
Vol 21 (1) ◽  
pp. 41-50
Author(s):  
Ana Maria Mesa-Vanegas ◽  
◽  
Esther Julia Naranjo-Gomez ◽  
Felipe Cardona ◽  
Lucia Atehortua-Garces ◽  
...  
Keyword(s):  
Pacific Coast ◽  
Inhibitory Concentration ◽  
Quality Parameter ◽  
Antimalarial Treatment ◽  
Active Components ◽  
Steroidal Compound ◽  
Pharmacologically Active ◽  
Article Study ◽  
Over Time

Solanum nudum Dunal (Solanaceae) is most commonly known and used by the population of the colombian Pacific coast as an antimalarial treatment. This article study into optimization and quantitative analysis of compounds steroidal over time of development of this species when grown in vitro and wild. A new steroidal compound named SN6 was elucidated by NMR and a new method of quantification of seven steroidal compounds (Diosgenone DONA and six steroids SNs) using HPLC-DAD-MS in extracts of cultures in vitro and wild was investigated. Biology activity of extracts was found to a range of antiplasmodial activity in FCB2 and NF-54 with inhibitory concentration (IC50) between (17.04 -100 μg/mL) and cytotoxicity in U-937 of CC50 (7.18 -104.7 μg/mL). This method creates the basis for the detection of seven sterols antiplasmodial present in extracts from S. nudum plant as a quality parameter in the control and expression of phytochemicals.

scholarly journals In vitro antimicrobial activity of plant active components against Pseudomonas lundensis and Listeria monocytogenes

2020 ◽  
Author(s):  
Khabat Noori Hussein ◽  
Tímea Molnár ◽  
Richard Pinter ◽  
Adrienn Toth ◽  
Emna Ayari ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Listeria Monocytogenes ◽  
Inhibitory Concentration ◽  
Agar Plate ◽  
Diffusion Method ◽  
Active Components ◽  
Plate Method ◽  
Gradient Plate ◽  
Strong Antimicrobial Activity

AbstractThis work aimed to study the antimicrobial activity of eight various components of plant origin on the growth of Pseudomonas lundensis and Listeria monocytogenes. Different in vitro methods were used: agar plate diffusion, micro atmosphere, agar hole diffusion, micro-dilution, and gradient-plate method. In the first agar plate assay, p-cymene and γ-terpinene did not inhibit the growth of the tested bacteria therefore they were not used in further experiments. Both α-pinene and limonene were only partially effective, but these were screened only for their partial inhibition. The other four components completely inhibited the growth of the tested bacteria. Using the agar-well diffusion method showed that carvacrol and thymol were found to be the most effective active components, thymol had minimum inhibitory concentration (MIC) at 1.563 mg/mL, however, in the case of carvacrol, MIC was 7.813 μL/mL. Additionally, eugenol and camphor show the same results but in higher concentrations. Gradient plate method was used to determine MIC values, in which it has been proved that carvacrol and thymol possess strong antimicrobial activity, no growth of tested bacteria was observed with carvacrol (100 μL/mL), while thymol exhibited MIC of 1.887 mg/mL against P. lundensis and 0.943 mg/mL needed to show complete inhibition of Listeria monocytogenes. Further experiments are needed to determine the optimum concentrations of the active components against P. lundensis and L. monocytogenes.

scholarly journals Microwave assisted solvent-free mannich bases: synthesis, characterization and effects of these compounds on HCA I and HCA II isozymes

2021 ◽  
Vol 40 (1) ◽  
pp. 43
Author(s):  
Bülent Büyükkıdan ◽  
Nurgün Büyükkıdan ◽  
Metin Bülbül ◽  
Melek Yılmaz ◽  
Evren Derrun Arslanbay ◽  
...  
Keyword(s):  
Carbonic Anhydrase ◽  
Esterase Activity ◽  
Inhibitory Concentration ◽  
Mannich Bases ◽  
Solvent Free ◽  
Inhibitory Effects ◽  
Solvent Free Conditions ◽  
Control Compound ◽  
Esterase Activities

Mannich bases (2a–d) of aromatic amines were synthesized by using a conventional microwave technique under solvent-free conditions and characterized by IR and NMR (1H and 13C) and elemental analysis. The inhibitory effects of the synthesized Mannich bases were examined in vitro by using hydratase and esterase assays on carbonic anhydrase I and II isozymes (hCA, EC 4.2.1.1) purified from human erythrocyte cells. Acetazolamide was used as the control compound. The values of IC50, the half-maximum inhibitory concentration, were found for hydratase and esterase activities. Only two compounds (2b and 2d) exhibited poor hCA I and hCA II inhibition effects on esterase activity. In contrast, compounds 2a and 2c could be used as carbonic anhydrase activators as a result of the increased esterase activity of hCA I and hCA II isozymes.

IN VITRO CHARACTERIZATION OF ANTIFUNGAL ACTIVITY OF SELECTED ESSENTIAL OILS

INDIAN DRUGS ◽  
2021 ◽  
Vol 57 (12) ◽  
pp. 61-64
Author(s):  
C. Rath Chandi ◽  
A. Samal
Keyword(s):  
Antifungal Activity ◽  
Essential Oils ◽  
Inhibitory Concentration ◽  
Inhibition Mechanism ◽  
Active Components ◽  
Irreversible Damage ◽  
Antifungal Activities ◽  
In Vitro Characterization

Antifungal activity of seven essential oils was studied primarily against C. albicans and E. floccosum. Four essential oils viz. turmeric, palmarosa, lemongrass and citronella, that revealed better antifungal activities during screening, were characterized further. Minimum Inhibitory concentration (MIC) and phenol coefficient values of the oils ranged between 0.97 to 62.5 µl/ml and 0125 to 0.75 respectively. The oils retained the antifungal activities when treated at high temperature (1000 C for 1h) and pressure (autoclaved), indicating presence of thermostable and barostable active components in them. The oils also resisted sonication (33,000Hz for 30min) and revealed antifungal activities against the two pathogens. Immediate killing of E. floccosum, is attributable to an irreversible damage to the cells. Antifungal activity of these oils as recorded during the study, could be attributable to the membrane inhibition mechanism and was observed to be fungicidal in nature.

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