scholarly journals Minor Chemical Constituents of Caesalpinia Bonduc

2009 ◽  
Vol 4 (3) ◽  
pp. 1934578X0900400
Author(s):  
Athar Ata ◽  
Chibuike C. Udenigwe ◽  
Elikana M. Gale ◽  
Radhika Samarasekera
Keyword(s):  
Chemical Constituents ◽  
Ethanolic Extract ◽  
Antibacterial Activities ◽  
Spectroscopic Studies ◽  
Glutathione S Transferase ◽  
Isolated Structures

From the ethanolic extract of Caesalpinia bonduc, one new diterpene, neocaesalpin P (1) and six known diterpenoids, neocaesalpin H (2), cordylane A (3), caesalpinin B (4), bonducellpin E (5), caesalpinolide A (6), and 17-methylvouacapane-8(14),-9(11)-diene (7) were isolated. Structures of these compounds were determined from NMR spectroscopic studies. Compounds 1-7 exhibited modest antibacterial activities. All of these compounds were weakly active in glutathione S-transferase inhibition assays.

Glutathione S-Transferase, Acetylcholinesterase Inhibitory and Antibacterial Activities of Chemical Constituents of Barleria prionitis

2007 ◽  
Vol 62 (4) ◽  
pp. 580-586 ◽  
Author(s):  
Kalhari S. Kosmulalage ◽  
Shamsulhaq Zahid ◽  
Chibuike C. Udenigwe ◽  
Sarfraz Akhtar ◽  
Athar Ata ◽  
...  
Keyword(s):  
Inhibitory Activity ◽  
Chemical Constituents ◽  
Ethanolic Extract ◽  
Antibacterial Activities ◽  
Spectroscopic Studies ◽  
Sri Lankan ◽  
Glutathione S Transferase ◽  
Ache Inhibitory Activity ◽  
Phytochemical Studies ◽  
Derivatives Of

Phytochemical studies on the ethanolic extract of Barleria prionitis of Sri Lankan origin have resulted in the isolation of a new compound, balarenone (1), along with three known compounds, pipataline (2), lupeol (3) and 13,14-seco-stigmasta-5,14-diene-3-α-ol (4). The structures of 1 - 4 were elucidated with the aid of extensive NMR spectroscopic studies. Compounds 1 - 4 showed moderate inhibitory activity against glutathione S-transferase (GST) and acetylcholinesterase (AChE). Compounds 1, 2 and 4 also exhibited antibacterial activity against Bacillus cereus and Pseudomonas aeruginosa (25 μg/disk). Three different derivatives of compound (2), 7,8-epoxypipataline (5), 8- amino-7-hydroxypipataline (6) and 7,8-dibromopipataline (7) were synthesized to evaluate them for GST and AChE inhibitory activities. Household microwave radiations were used to synthesize compound (6). Among all tested compounds, 8-amino-7-hydroxypipataline (6) exhibited a significant AChE inhibitory activity with an IC50 value of 36.8 μM.

Glutathione S-Transferase, Acetylcholinesterase Inhibitory and Antibacterial Activities of Chemical Constituents of Barleria prionitis.

ChemInform ◽  
2007 ◽  
Vol 38 (31) ◽  
Author(s):  
Kalhari S. Kosmulalage ◽  
Shamsulhaq Zahid ◽  
Chibuike C. Udenigwe ◽  
Sarfraz Akhtar ◽  
Athar Ata ◽  
...  
Keyword(s):  
Chemical Constituents ◽  
Antibacterial Activities ◽  
Glutathione S Transferase

scholarly journals Antioxidant Activity and Flavonoids Identification by LC-MS/MS Analysis in Leaf Extract from Trattinnickia rhoifolia Willd

2019 ◽  
Vol 8 (2) ◽  
pp. 13-34
Author(s):  
Lilian Marigo Magalhaes ◽  
Valeria Dornelles Gindri Sinhorin ◽  
Camila Cristina Pereira de Souza ◽  
Rogério de Campos Bicudo ◽  
Adilson Paulo Sinhorin
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Capacity ◽  
Leaf Extract ◽  
Chemical Constituents ◽  
Ethanolic Extract ◽  
Glutathione S Transferase ◽  
Hypolipidemic Action ◽  
Protein Thiols ◽  
First Time

The objectives of this work were to evaluate the antioxidant and hepatoprotective activities in the oxidative stress model induced by paracetamol in male Swiss mice, to evaluate the hypoglycemic and hypolipidemic action and to identify flavonoids in the leaves ethanolic extract from Trattinnickia rhoifolia. By the LC-MS / MS method, eight flavonoids were identified in the hydromethanolic (HM) and ethyl acetate (EA) fractions, except for Amentoflavone, the flavonoids Apigenin, Canferol, Luteolin, Quercetin, Quercetin-3-β-d-glucoside, Rutin and Taxifoline were identified for the first time in this species. These fractions were evaluated for antioxidant capacity (DPPH— test) and their protective effect in vivo through the analysis of superoxide dismutase, catalase, glutathione-s-transferase, non-protein thiols, ascorbic acid, TBARS and carbonylated proteins. The data showed that EA has antioxidant capacity and superior oxidative stress repair in chemical and biological analyzes, besides hypoglycemic and hypolipidemic action. Thus, the present work contributes significantly to the literature, since it is the first study that identifies the chemical constituents and pharmacological properties of leaves extract from T. rhoifolia.

scholarly journals Bactericidal Effect and Anti-Inflammatory Activity of Cassia garettiana Heartwood Extract

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Sumalee Panthong ◽  
Arunporn Itharat ◽  
Suchada Naknarin ◽  
Pranporn Kuropakornpong ◽  
Buncha Ooraikul ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Chemical Constituents ◽  
Ethanolic Extract ◽  
Antibacterial Activities ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Inhibiting Effect ◽  
Anti Inflammatory ◽  
Time Kill

Natural products are used as alternative drugs in traditional medicine to treat infection and inflammation and relieve pain. Heartwood of Cassia garettiana Craib has been investigated as an ingredient in Thai traditional medicine for anti-HIV protease, but there is no report on its antibacterial and anti-inflammatory activities. The objectives of this study were to investigate the anti-inflammatory and antibacterial activities, time-kill profile, and main active constituents of an ethanolic extract of C. garettiana heartwood. The study followed the generally accepted experimental design. All tests were investigated in triplicate. The heartwood of C. garettiana was extracted by maceration with 95% EtOH. The antibacterial activity of the extract and its chemical constituents were determined by their MIC values using resazurin as an indicator. Time-kill profile was determined at 0, 2, 4, 6, 8, 10, 12, and 24 hrs and expressed as log CFU/mL. The anti-inflammatory activity of the extract and its chemical components was investigated by their inhibiting effect on IL-6 and TNF-α production by ELISA. The ethanolic extract was analyzed for its chemical constituents by HPLC technique. The ethanolic extract showed both dose- and time-dependent bactericidal effects against Staphylococcus aureus, methicillin-resistance Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, Pseudomonas aeruginosa, Salmonella Typhi, Salmonella Typhimurium, Klebsiella pneumoniae, and Shigella dysenteriae with MIC values of 312.5, 312.5, 312.5, 1,250, 2,500, 625, 625, 2,500, and 625 μg/mL, respectively. It showed an inhibiting effect on IL-6 production at concentrations of 12.5 to 100 μg/mL. The main active chemical constituent of C. garettiana was piceatannol that showed antibacterial activity against all test bacteria except P. aeruginosa. C. garettiana showed a broad spectrum of antibacterial activity against both Gram-negative and Gram-positive bacteria. Piceatannol and resveratrol from the plant strongly inhibited IL-6 production. Based on these results, we concluded that the ethanolic extract of C. garettiana showed both an antibacterial activity and inhibition of IL-6. Piceatannol is the active constituent of the extract and showed anti-inflammatory and antibacterial activities against Gram-negative and Gram-positive bacteria.

scholarly journals Minor Chemical Constituents of Vitex Pinnata

2009 ◽  
Vol 4 (1) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Athar Ata ◽  
Nathan Mbong ◽  
Chad D. Iverson ◽  
Radhika Samarasekera
Keyword(s):  
Candida Albicans ◽  
Antifungal Activity ◽  
Chemical Constituents ◽  
Spectroscopic Studies ◽  
Iridoid Glucoside ◽  
Isolated Structures

From the bark of Vitex pinnata, one new iridoid glucoside, pinnatoside (1) and three known flavonoids, viscioside (2), apigenin (3), and luteolin (4), were isolated. Structures of these compounds were determined from NMR spectroscopic studies. Compound 1 exhibited modest antifungal activity against Candida albicans.

Chemical Constituents and Antibacterial Activity of Cissus Aralioides.

2020 ◽  
Vol 17 ◽  
Author(s):  
Balogun Olaoye Solomon ◽  
Ajayi Olukayode Solomon ◽  
Owolabi Temitayo Abidemi ◽  
Oladimeji Abdulkarbir Oladele ◽  
Liu Zhiqiang
Keyword(s):  
Plant Extract ◽  
Chemical Constituents ◽  
Ethyl Acetate Fraction ◽  
Antibacterial Activities ◽  
Sub Saharan Africa ◽  
Chromatographic Purification ◽  
Whole Plant ◽  
Sub Saharan ◽  
First Time

: Cissus aralioides is a medicinal plant used in sub-Saharan Africa for treatment of infectious diseases; however the chemical constituents of the plant have not been investigated. Thus, in this study, attempt was made at identifying predominant phytochemical constituents of the plant through chromatographic purification and silylation of the plant extract, and subsequent characterization using spectroscopic and GC-MS techniques. The minimum inhibitory concentration (MICs) for the antibacterial activities of the plant extract, chromatographic fractions and isolated compounds were also examined. Chromatographic purification of the ethyl acetate fraction from the whole plant afforded three compounds: β-sitosterol (1), stigmasterol (2) and friedelin (3). The phytosterols (1 and 2) were obtained together as a mixture. The GC-MS analysis of silylated extract indicated alcohols, fatty acids and sugars as predominant classes, with composition of 24.62, 36.90 and 26.52% respectively. Results of MICs indicated that friedelin and other chromatographic fractions had values (0.0626-1.0 mg/mL) comparable with the standard antibiotics used. Characterization of natural products from C. aralioides is being reported for the first time in this study.

scholarly journals Betel (Piper betle L.) leaf ethanolic extracts dechlorophyllized using different methods: antioxidant and antibacterial activities, and application for shelf-life extension of Nile tilapia (Oreochromis niloticus) fillets

RSC Advances ◽  
2021 ◽  
Vol 11 (29) ◽  
pp. 17630-17641
Author(s):  
Mohamed Tagrida ◽  
Soottawat Benjakul
Keyword(s):  
Shelf Life ◽  
Nile Tilapia ◽  
Ethanolic Extract ◽  
Antibacterial Activities ◽  
Life Extension ◽  
Piper Betle ◽  
Refrigerated Storage ◽  
Betel Leaf ◽  
Nile Tilapia Oreochromis Niloticus ◽  
Ethanolic Extracts

Betel leaf ethanolic extract dechlorophyllized using sedimentation (BLEE-SED) exhibited enhanced antioxidant and antibacterial activities. BLEE-SED could extend the shelf-life of Nile tilapia fillets during refrigerated storage (4 °C) up to 9 days.

Antibacterial activities of the chemical constituents of Schizophyllum commune MST7-3 collected from coal area

2021 ◽  
pp. 1-10
Author(s):  
Guang-Gui Chen ◽  
Qin-Feng Zhu ◽  
Xing-Mei Long ◽  
Qian Lu ◽  
Kai-Yu Li ◽  
...  
Keyword(s):  
Chemical Constituents ◽  
Schizophyllum Commune ◽  
Antibacterial Activities

scholarly journals EVALUATION OF ENZYMIC AND NON-ENZYMIC ANTIOXIDANT LEVELS IN VERNONIA CINEREA EXTRACTS

2018 ◽  
Vol 11 (7) ◽  
pp. 167
Author(s):  
Nishadh Abubakker
Keyword(s):  
Ethyl Acetate ◽  
Fine Powder ◽  
Ethanolic Extract ◽  
Maximum Activity ◽  
Glutathione S Transferase ◽  
Reduced Pressure ◽  
Methanolic Extracts ◽  
Enzymic Antioxidants ◽  
Glucose 6 Phosphate Dehydrogenase ◽  
Vernonia Cinerea

Objective: The objective of this study was to evaluate the enzymic and non-enzymic antioxidant levels in various solvent extracts of Vernonia cinerea leaves.Methods: The fine powder of leaf (180 g) was extracted successively with methanol, ethanol, petroleum ether (40–60°C), benzene, acetone, ethyl acetate, chloroform, and aqueous in a Soxhlet extractor for 18 h. The extracts were concentrated under reduced pressure at low temperature (40– 50°C), and the extracts were analyzed for the antioxidant enzymes such as catalase (CAT), superoxide dismutase (SOD), peroxidise, glutathione S-transferase (GST), glutathione peroxidase (GPx), polyphenol oxidase, glutathione (GSH) reductase, and glucose-6-phosphate dehydrogenase and non-enzymic antioxidants such as Vitamin A, C, E, reduced GSH, and total phenol.Results: Significant activities of enzymic antioxidants such as CAT (23.68 μ mole of H2O2 decomposed/min/mg protein, SOD (19.75 inhibition of 50% nitrite form/min/mg protein), and GST (73.28 μ mole of 1-chloro-2,4-dinitrobenzene conjugate formed/min) were observed higher in the methanolic extracts. Whereas, ethanolic extract exhibits maximum activity of GPx (1.054 μ mole of GSH utilized/min) and Px (102.1 μ mole of pyrogallol oxidized/ min/mg protein). Total GSH (172.3 μM/g), Vitamin E (23.76 μM/g), and total phenols were significantly predominant in the ethanolic extracts followed by methanol and ethyl acetate extracts.Conclusion: V. cinerea seems to be a promising plant in respect of its antioxidant potential, there is a lot more to be done to understand the mechanisms behind these effects as well as to employ them as possible therapeutic agents.

scholarly journals GC-MS Chemical Characterization of Main Components of Smilax Domingensis Wild. in Cuba

2018 ◽  
Vol 5 (4) ◽  
pp. 79 ◽  
Author(s):  
Pilar A. Soledispa ◽  
José González ◽  
Armando Cuéllar ◽  
Julio Pérez ◽  
Max Monan
Keyword(s):  
Mass Spectra ◽  
Chemical Constituents ◽  
Chemical Characterization ◽  
Ethanolic Extract ◽  
Chemical Compounds ◽  
Chemical Components ◽  
Analytical Technique ◽  
Main Components ◽  
First Time

A preliminary chemical characterization of main components of ethanolic extract with dried rhizomes of Smilax domingensis Wid. that grow in Cuba was done using a GCMS-QP2010 Ultra Shimadzu and the mass spectra of the compounds found in the extract was matched with the National Institute of Standards and Technology (NIST) library. After sample derivatization 125 chemical compounds were registered by the equipment and from them, 35 different chemical components were characterized and reported for the first time from this part of the plant in our country. The results demonstrate the developed method could be employed as a rapid and versatile analytical technique for identification of chemical constituents and quality control of Smilax domingensis.

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