Bioactivity of Lignans from Taxus baccata

2004 ◽  
Vol 59 (7-8) ◽  
pp. 494-498 ◽  
Author(s):  
Nurgun Erdemoglu ◽  
Bilge Sener ◽  
M. Iqbal Choudhary
Keyword(s):  
Antibacterial Activity ◽  
Cell Line ◽  
Ethanol Extract ◽  
Antimicrobial Activities ◽  
Chloroform Extract ◽  
The Other ◽  
Bovine Aortic Endothelial Cell ◽  
Taxus Baccata ◽  
Reference Drug ◽  
Cell Line Panel

AbstractThree lignan derivatives, (-)-taxiresinol (1), (-)-3′-demethylisolariciresinol-9′-hydroxyisopropylether (2) and (-)-3-demethylisolariciresinol (3), previously isolated from the heartwood of Taxus baccata L. (Taxaceae) were investigated for cytotoxicity against the Oncology Cell Line Panel (breast, colon, ovary, prostate, lung and a normal adult bovine aortic endothelial cell line) as well as for antimicrobial activities. Besides, a chloroform-soluble portion of the ethanol extract from the heartwood of T. baccata was also tested for antimicrobial activities. Compounds 1 - 3 did not demonstrate much cytotoxic potency according to the reference drug etoposide. With the exception of compound 2, the other two lignans (1 and 3) and the chloroform extract were shown to possess antifungal activity, whereas only the chloroform extract exhibited antibacterial activity against Pseudomonas aeruginosa

scholarly journals Antibacterial potential and ethnomedical relevance of Kumaun Himalayan Gymnosperms

2016 ◽  
Vol 5 (5) ◽  
pp. 190-200
Author(s):  
Savita Joshi ◽  
◽  
S.C. Sati ◽  
Parikshit Kumar ◽  
◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Pathogenic Bacteria ◽  
Ethanol Extract ◽  
Chloroform Extract ◽  
New Drugs ◽  
Diffusion Method ◽  
Taxus Baccata ◽  
Cedrus Deodara ◽  
Kumaun Himalaya ◽  
Antibacterial Potential

Ethnomedicinal information is one of the powerful criteria for new drugs discoveries therefore; present investigation was carried out to evaluate the ethnomedicinal and antibacterial potential of traditional Kumaun Himalayan gymnosperms. Besides, an antibacterial value index and relative antibacterial activity of studied plants have been established. Forty four plant leaves extracts in different organic solvents (methanol, ethanol, chloroform and hexane) of 11 gymnosperms (Araucaria cunninghamii, Biota orientalis, Cedrus deodara, Cephalotaxus griffithi, Cryptomeria japonica Cupressus torulosa, Ginkgo biloba, Juniperus communis, Picea smithiana, Pinus wallichiana and Taxus baccata) occurring in Kumaun Himalaya were screened for their antimicrobial activity against five pathogenic bacteria using disc diffusion method. The antibacterial activity of studied gymnospermic plant extracts against a panel of bacteria was found effective at 1000 µg/ml. The MIC and MBC values of each extract (where ZOI ≥ 15 mm) were also determined. The methanol extract of screened gymnosperms were found the most effective against all the bacteria (54% to 81%), followed by ethanol extract (45-72%), hexane extract (18-27%), while in chloroform extract it ranged 9-27% only. The extracts of G. biloba exhibited superior Relative Antibacterial Activity (RAA, 20%), followed by A. cunninghamii and P. wallichiana (12% RAA, each). The lowest RAA value was observed for C. torulosa (1%). All data were also analyzed for determination of an Antibacterial Value Index (ABVI) for each studied species of gymnosperm. G. biloba had maximum ABVI i.e. 90 % followed by A. cunninghamii and P. wallichiana (ABVI, 55% each). C. torulosa showed the least ABVI and RAA i.e. 5% and 11%, respectively. The present work fully highlighted the utility of traditionally known 11 gymnosperms of Kumaun Himalaya for their antibacterial activities against pathogenic bacteria.

scholarly journals Anticancer and Anti-Inflammatory Activities of Some New Pyrazolo[3,4-b]pyrazines

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2657
Author(s):  
Hussein El-Kashef ◽  
Talaat El-Emary ◽  
Pierre Verhaeghe ◽  
Patrice Vanelle ◽  
Maha Samy
Keyword(s):  
Breast Cancer ◽  
Cell Line ◽  
Cancer Cell Line ◽  
Acetyl Derivative ◽  
The Other ◽  
Reference Drug ◽  
Anti Inflammatory ◽  
Sar Study ◽  
Derivatives Of ◽  
Mcf 7

New derivatives of pyrazolo[3,4-b]pyrazines and related heterocycles were synthesized using 5-amino-3-methyl-4-nitroso-1-phenyl-pyrazole (1) as a starting material. The 5-acetyl derivative 15 was shown to be a useful key intermediate for the synthesis of several derivatives of pyrazolopyrazines. Some of the prepared compounds were evaluated for their anti-inflammatory and anti-breast cancer MCF-7 cell line activities. SAR study showed that compounds 15 and 29 exhibited remarkable anti-inflammatory activity, where 15 showed the same activity as that of the reference drug indomethacin. On the other hand, compounds 25i, 25j showed very significant inhibitory activity (p < 0.001) against MCF-7 breast cancer cell line.

scholarly journals PHYTOCHEMICAL SCREENING AND ANTIBACTERIAL ACTIVITY OF BAWANG DAYAK (ELEUTHERINE SP.) AND HATI TANAH (ANGIOPTERIS SP.) AND THEIR COMBINATION AGAINST PROPIONIBACTERIUM ACNES

2019 ◽  
pp. 11-13
Author(s):  
SUSI NOVARYATIIN
Keyword(s):  
Antibacterial Activity ◽  
Propionibacterium Acnes ◽  
Ethanol Extract ◽  
The Other ◽  
Disc Diffusion ◽  
Phytochemical Screening ◽  
Other Hand ◽  
Diffusion Technique ◽  
Inhibition Zones

Objective: The objective of this research was to investigate the preliminary phytochemical screening and antibacterial activity of Bawang Dayak(Eleutherine sp.) and Hati Tanah (Angiopteris sp.) and their combination against Propionibacterium acnes.Methods: The extracts were used for phytochemical screening. Antibacterial activity was performed using disc diffusion technique, with twovariations of the concentration of 5% and 10% for each extracts, and combination of both extracts with three combinations: (1) 5%: 5%, (2) 5%: 10%, and (3) 10%: 5%.Results: Both extracts contained tannins, saponins, and steroids. The antibacterial activity against P. acnes showed that the inhibition zones ofBawang Dayak ethanol extract were 6.1±1.5 mm (5%) and 8.7±1.3 mm (10%). On the other hand, the inhibition zones of Hati Tanah ethanol extract were 4.0±1.6 mm (5%) and 9.2±2.5 mm (10%). The inhibition zones produced in combinations 1, 2, and 3 were 5.8±0.3 mm, 10.8±2.0 mm, and 15.5±2.8 mm, respectively.Conclusion: In this study showed the presence of tannins, saponins, and steroids that might be responsible for antibacterial activity in both extract. The best antibacterial activity was produced by combining the two extracts (combination 3).

scholarly journals Phytochemical analysis, antioxidant and antimicrobial activities of Salvia virgata mericarps

2021 ◽  
Vol 45 (2) ◽  
pp. 223-231
Author(s):  
Kara Guzel ◽  
Mahmut Ulger ◽  
Ahmet Kahraman
Keyword(s):  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Ethanol Extract ◽  
Antimicrobial Activities ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Dietary Fibers ◽  
Reference Drug ◽  
Phenolic And Flavonoid ◽  
Antioxidant And Antimicrobial Activities

The phytochemical contents of Salvia virgata mericarps and the antioxidant and antimicrobial activities of its ethanol extract were studied for the first time. S. virgata mericarps were collected in the province of Trabzon, Turkey. Chemical analyses were performed using chromatographic methods. The total phenolic and flavonoid contents and antioxidant potential were measured using Folin-Ciocalteu, Al(NO3)3, and DPPH radical scavenging activity methods, respectively. The antimicrobial activity was evaluated using the microdilution method for all the tested bacterial and fungal strains, with the exception of Mycobacterium tuberculosis for which the resazurin microtiter plate method was applied. The mericarps were rich in glutamic acid (3934 mg/100 g), potassium (12578.8 ?g/g), calcium (12092.0 ?g/g), and dietary fibers (35.565 g/100 g). The total phenolic and flavonoid contents were 2.50 ?g GAE/mg extract and 0.34 ?g QE/mg extract, respectively. The most effective DPPH free radical scavenging activity determined for the highest applied concentration was 92.44%. The ethanol extract obtained from the mericarps was found to be as effective as the reference drug ampicillin (MIC value = 125 ?g/mL) against the nosocomial pathogen Acinetobacter baumannii. In conclusion, S. virgata mericarps provide good nutritional value with low amounts of carbohydrates and high dietary fibers, amino acids, minerals and total phenolic and flavonoid contents and medicinal properties.

scholarly journals Green propolis as an adjuvant against nontuberculous mycobacteria

Rodriguésia ◽  
2021 ◽  
Vol 72 ◽  
Author(s):  
Suzane Olachea Allend ◽  
Lisiane Volcão ◽  
Carolina da Silva Canielles ◽  
Israel Barbosa ◽  
Dara Biatobock ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Nontuberculous Mycobacteria ◽  
Ethanol Extract ◽  
Antimycobacterial Activity ◽  
Antimicrobial Activities ◽  
Resistance Mechanisms ◽  
The Other ◽  
New Drugs ◽  
Mycobacterium Chelonae

Abstract Natural products have been touted as important tools because of their vast potential for the development of compounds with antimicrobial activity and the possible inhibitory activity and/or adjuvant resistance mechanisms. Propolis has been empirically used for many years for the treatment of diseases, mainly due to its antioxidant, anti inflammatory and antimicrobial activities. This study aimed to evaluate the in vitro antimycobacterial activity of the ethanol extract of propolis alone and in combination with rifampicin (RIF), amikacin (AMI) and ciprofloxacin (CIP). The ethanol extract of propolis showed antibacterial activity against Mycobacterium chelonae and M. kansasii and was capable of increasing AMI, RIF and CIP activity in combination. On the other hand, compared to M. absecessus, M. fortuitum and M. avium, the extract was not active at 200 µg/mL and did not show pronounced adjuvant capacity when evaluated in association with the drugs. Based on these results, it can be concluded that the ethanol extract of propolis could be an alternative in the development of new drugs and can be used complementary with the current mycobacteriosis treatment.

scholarly journals Phytochemical screening and antimicrobial activity of stem extract of Coleus forskohlii L. collected from Al-Baha Area, Saudi Arabia

2021 ◽  
Vol 16 (2) ◽  
pp. 078-086
Author(s):  
Abdulaziz Yahya Al-Ghamdi
Keyword(s):  
Ethyl Acetate ◽  
Petroleum Ether ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Petroleum Ether Extract ◽  
Ethanol Extract ◽  
Antimicrobial Activities ◽  
Chloroform Extract ◽  
Total Phenolic ◽  
Phytochemical Screening

This study aimed to investigate the phytochemical screening, total phenolic content, antioxidant and antimicrobial activities of Coleus forskohlii L. stem extract in Al-Baha area, Saudi Arabia. Stem samples were collected from Al-Baha area and air-dried followed by extraction with ethanol, petroleum ether, chloroform, ethyl acetate, and n-butanol. The extracts were then subjected to phytochemical screening, determination of total phenolic content, antioxidant and antimicrobial activities. Results showed the presence of flavonoids, alkaloids, tannins, terpenoids, steroids, saponins, and reducing sugars. Total phenolic content was significantly (P<0.001) higher in n-butanol extract (274.33±3.29 mg GAE/gm), followed by ethyl acetate extract (182.94±1.82 mg GAE/gm), ethanol extract (79.63±2.02 mg GAE/gm) and petroleum ether extract (73.38±3.07 mg GAE/gm), while the lowest content was in chloroform extract (60.06±2.12 mg GAE/gm). The antioxidant activity was significantly (P<0.001) higher in n-butanol extract (67.68±1.55%), followed by ethyl acetate extract (43.38±1.27%), ethanol extract (36.02±1.29%), petroleum ether extract (20.71±0.59%) and chloroform extract (19.73±0.74%). The antimicrobial activity showed that all microorganisms tested were resistant at the concentration of 25 and 50 mg/ml of plant extracts, whereas the concentrations of 100, 150 and 200 mg/ml showed varying activities against gram-negative (Escherichia coli, Pseudomonas aeruginosa), gram-positive (Staphylococcus aureus, Bacillus cereus) and Candida albicans. The study concluded that the stem extracts of C. forskohlli have promising pharmacological and biological activities that could be beneficial in pharmaceutical as well as food and medicinal industries.

scholarly journals Phytoconstituent Analysis and Antibacterial Potential of Epicarp Extracts from Mature Fruits of Persea americana Mill

2020 ◽  
Vol 4 (2) ◽  
pp. 94
Author(s):  
Cyuzuzo Callixte ◽  
Dusabimana Jean Damascene ◽  
Anwar Ma'aruf ◽  
Yoes Prijatna Dachlan ◽  
Anggraini Dwi Sensusiati ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Ethanol Extract ◽  
Chloroform Extract ◽  
Persea Americana ◽  
World Health ◽  
Diffusion Method ◽  
Plant Materials ◽  
Inhibition Zones ◽  
Health Organization ◽  
Antibacterial Potential

Background: World Health Organization (WHO) has reported the antimicrobial resistance as one among the ten threats to global health in 2019. The development of plant-derived antibiotics is currently considered as a modern medicine’s greatest success. Persea americana is a plant with high medicinal profile which allow its different parts to be used for therapeutic purposes. This study is aimed to determine the antibacterial potential of ethanol and chloroform extracts from epicarp of mature fruits of P. americana Mill against human pathogens.Materials and Methods: The epicarps of avocado were dried in oven and ground into powder using porcelain mortar and pestle. The powdered plant materials were extracted with both 96% ethanol and chloroform. Extracts were qualitatively screened to examine their bioactive contents and agar well diffusion method was used to analyze the antibacterial activity of extracts against both Gram-positive and Gram-negative bacteria.Results: Both solvents showed the ability to dissolve the secondary metabolites from avocado epicarps. Phytochemical screening disclosed the presence of alkaloids, proteins, terpenoids, tannins, flavonoids, steroids and phenolic compounds in ethanolic extracts and absence of flavonoids and tannins in chloroform extracts. The extracts showed the inhibition zones ranging from 14±4.5 mm to 26±2.1 mm while streptomycin demonstrated high inhibition zones ranging from 20±3.1 mm to 30 mm. The minimum inhibitory concentration (MIC) values of extracts fall in the range of 0.3125 mg/mL and 20 mg/mL while the MIC values for streptomycin vary from 0.25 mg/mL to 1.25 mg/mL.Conclusion: The ethanol and chloroform extracts proved to be potentially effective and to be used as natural alternative preventives to fight against various disease-causing bacteria.Keywords: antibacterial activity, ethanol extract, chloroform extract, Persea americana, Rwanda

scholarly journals Thrombolytic Activity and Antimicrobial Properties of Ficus hispida

2013 ◽  
Vol 5 (2) ◽  
pp. 393-397 ◽  
Author(s):  
M. Shahriar ◽  
S. Islam ◽  
S. Parvin ◽  
S. Hoque
Keyword(s):  
Soluble Fraction ◽  
Antimicrobial Properties ◽  
Ethanol Extract ◽  
Antimicrobial Activities ◽  
The Other ◽  
Thrombolytic Activity ◽  
Blood Samples ◽  
Plant Parts ◽  
Human Blood Samples ◽  
Ficus Hispida

In this present study, the various plant parts of Ficus hispida were subjected to thrombolytic and antimicrobial activities. The thrombolytic activities were assessed by using human blood samples and the results were compared with standard streptokinase (SK). In this study, the methanol soluble fraction (MSF) exhibited highest thrombolytic activity (50.12±1.91). However, significant thrombolytic activity was demonstrated by the crude ethanol extract (CEE) and n-hexane soluble fraction (HSF) of F. hispida (21.74±0.69) and (42.22±1.42) respectively. On the other hand, the n- hexane soluble fraction (HSF) and methanol soluble fraction (MSF) of ethanol extract revealed moderate antibacterial activity against some microorganisms used in the screening.Keywords: Ficus hispida; Thrombolytic activity; Antimicrobial activity.© 2013 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.doi: http://dx.doi.org/10.3329/jsr.v5i2.11988         J. Sci. Res. 5 (2), 393-397 (2013)

scholarly journals Phytochemical Screening and Antibacterial Activity of Acorus calamus L. Extracts

2019 ◽  
Vol 4 (1) ◽  
pp. 68-78
Author(s):  
Bayyinatul Muchtaromah ◽  
Alfiah Hayati ◽  
Erna Agustina
Keyword(s):  
Antibacterial Activity ◽  
Antibacterial Properties ◽  
Ethanol Extract ◽  
Inhibition Zone ◽  
Common Species ◽  
Chloroform Extract ◽  
Hexane Extract ◽  
Acorus Calamus ◽  
E Coli ◽  
Microdilution Method

  Staphylococcus aureus and Escherichia coli are among the most common species of gram-positive and gram-negative bacteria, which cause vaginitis, in infertile women. The Calamus rhizome (Acorus calamus L.) is an Indonesian plant that has antibacterial properties that can be used to treat vaginitis and increase fertility. The aim of this study was to determine the phytochemical and antibacterial activity of the calamus rhizoma in polar, semi-polar and non-polar solvents in the growth of S. aureus and E. coli. The antibacterial activity test was in the form of inhibitory test using the Kirby-Bauer, Minimum Inhibi-tion Concentration (MIC) and Minimum Bactericidal Concentration (MBC) by microdilution method with multilevel dilution (concentra-tions 50; 25; 12.5; 6.25; 3.13; 1.56; 0.78; and 0.39%). The screening results showed that ethanol and n-hexane extract contained alkaloids and triterpenoids, while chloroform extract was only triterpenoid. Chloroform extract produced the largest inhibition zone diameter of S. aureus and E. coli (7.26 and 3.28 mm), followed by ethanol extract (5.90 and 3.07 mm) and n-hexane extract (5.33 and 2.95 mm). The concentrations of 0.39 and 0.78% were the values of MIC and MBC for all three extracts, indicating that the extract of the calamus rhizome with several solvents in this study had the same antibacterial activity. 

Synthesis and Biological Evaluation of Benzothiazole-piperazinesulfonamide Conjugates and Their Antibacterial and Antiacetylcholinesterase Activity

2019 ◽  
Vol 16 (9) ◽  
pp. 723-734
Author(s):  
B. Ramalingeswara Rao ◽  
Mohana R. Katiki ◽  
Kommula Dileep ◽  
C. Ganesh Kumar ◽  
G. Narender Reddy ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Inhibitory Activity ◽  
Micrococcus Luteus ◽  
Antimicrobial Activities ◽  
Biological Evaluation ◽  
Bacterial Strains ◽  
Reference Drug ◽  
Ache Inhibitory Activity ◽  
Synthesis And Biological Evaluation

Two series of N-2-benzothiazolyl-4-(arylsulfonyl)-1-piperazineacetamides/propanamides were synthesized from substituted 2-aminobenzothiazoles and were assayed for their in vitro antimicrobial activities against a panel of different pathogenic bacterial strains such as Micrococcus luteus, S. aureus, S. aureus MLS-16, B. subtilis, Escherichia coli, Pseudomonas aeruginosa, Klebsiella planticola and Candida albicans. Among the synthesized compounds 5e,f,g and 6g,h,i showed promising antifungal activity against C. albicans as compared to the reference drug, miconazole. Further, compounds 6g,h,i showed broad spectrum antibacterial activity against all the tested bacterial strains, while the compounds 6a-f,j-m showed significant antibacterial activity against all the tested bacterial strains as compared to the reference drug, ciprofloxacin. In addition, the target compounds were evaluated for their acetylcholinesterase (AChE) inhibitory activity, and, among the tested, compounds 5j,k,l and 6i showed promising AChE inhibitory activity.

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