Grafting of gallic acid onto chitosan nano particles enhances antioxidant activities in vitro and protects against ochratoxin A toxicity in catfish ( Clarias gariepinus )

2016 ◽  
Vol 41 ◽  
pp. 279-288 ◽  
Author(s):  
Mosaad A. Abdel-Wahhab ◽  
Abdulhadi Aljawish ◽  
Amany M. Kenawy ◽  
Aziza A. El-Nekeety ◽  
Heba S. Hamed ◽  
...  
Keyword(s):  
Gallic Acid ◽  
Ochratoxin A ◽  
Antioxidant Activities ◽  
Clarias Gariepinus ◽  
Nano Particles

scholarly journals Antiulcer Activity and Potential Mechanism of Action of the Leaves of Spondias mombin L.

2018 ◽  
Vol 2018 ◽  
pp. 1-20 ◽  
Author(s):  
Samara Alves Brito ◽  
Cynthia Layse Ferreira de Almeida ◽  
Temístocles Italo de Santana ◽  
Alisson Rodrigo da Silva Oliveira ◽  
Jéssica Carla Bezerra do Nascimento Figueiredo ◽  
...  
Keyword(s):  
Gastric Mucosa ◽  
Gallic Acid ◽  
Ellagic Acid ◽  
Antioxidant Activities ◽  
Chronic Ulcer ◽  
Antiulcer Activity ◽  
Spondias Mombin ◽  
Sh Groups ◽  
Ulcer Model

Spondias mombin L. is used in folk medicine for the treatment of inflammation and gastrointestinal diseases. Our study investigated the antiulcer activity of S. mombin ethanolic extract (SmEE) and its majority compounds gallic acid (GA) and ellagic acid (EA). Phytochemical characterization was performed by HPLC. The SmEE was screened for in vitro antioxidant activities using phosphomolybdenum, ABTS, DPPH, and FRAP assays. The antiulcer activity of SmEE, GA, EA, or GA + EA was evaluated by gastric lesion models induced by absolute ethanol and indomethacin. Following this, it is capable of stimulating mucus production, antisecretory capacity, and the influence of −SH groups and NO in the effect of SmEE. Its healing activity was demonstrated by acetic acid-induced chronic ulcer model. Anti-Helicobacter pylori activity was assessed by determining the MIC of the SmEE (64–1024 μg/mL). The HPLC results identified the presence of gallic acid and ellagic acid in SmEE. The extract showed antioxidant activity in vitro. SmEE (50, 100, and 200 mg/kg) reduced the area of ulcerative lesions induced by ethanol in 23.8, 90.3, and 90.2%, respectively. In NSAID model, the SmEE induced protection of 36.8, 49.4, and 49.9%, respectively. GA (10 mg/kg) or EA (7 mg/kg) or the association of GA + EA (10 + 7 mg/kg) inhibited the ethanol-induced lesions in 71.8, 70.9, and 94.9%, respectively, indicating synergistic action. SmEE (100 mg/kg) decreased acid secretion and H+ concentration in the gastric contents, increased levels of mucus, and showed to be dependent of −SH groups and NO on the protection of the gastric mucosa. In chronic ulcer model, SmEE reduced the gastric area lesion. SmEE showed anti-H. pylori activity. In conclusion, our study showed that SmEE has antiulcerogenic activity. GA and EA are isolated gastric protectors and, when associated, acted synergistically to protect the gastric mucosa.

scholarly journals Phytochemicals and In-Vitro Antioxidant Activities of Aloe Vera Gel

2020 ◽  
Vol 44 (1) ◽  
pp. 33-41
Author(s):  
Md Nazim Uddin ◽  
Subrata Chandra Roy ◽  
Abdulla All Mamun ◽  
Kanika Mitra ◽  
Md Zahurul Haque ◽  
...  
Keyword(s):  
Gallic Acid ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Aloe Vera ◽  
The Other ◽  
Total Phenolic ◽  
Antioxidant Power ◽  
Aloe Vera Gel ◽  
Gallic Acid Equivalent

The phytochemicals (total phenolic, tannin, flavonoid, alkaloid, and saponin) contents in the Aloe vera gel derived from the leaf of Aloe vera (L.) Burm. f. (Synonym Aloe barbadensismiller) were extracted and their antioxidant capacity was studied by Ferric reducing antioxidant power assay (FRAP), by free radical-scavenging capability using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS). Three different solvents with three different polarities CH3OH, CH3OH: HCl, CH3CH3OH: H2O were used at v/v ratio of 100, 98:2, 70:30, respectively. The acidified methanol solvent extracted the highest amounts of phytochemicals including total phenolic (4.64 mg gallic acid equivalent/g), tannin (3.84 mg tannic acid equivalent/g), alkaloid (662 mg piperine equivalent/g), and saponin (353 mg diosgenin equivalents/g) compared to the other two solvents. Similarly, in the extract with acidified methanol solvent, high level of total antioxidant activity (about 12 mg gallic acid equivalent/g) and scavenging effects expressed as 50% inhibition concentrations (IC50) for DPPH and ABTS assay were determined to be about 61 μg/mL and 371 μg/mL, respectively, which are higher than those with the other two solvents. The gel extract could be used as a potent antioxidant in medicine and food industries. Journal of Bangladesh Academy of Sciences, Vol. 44, No. 1, 33-41, 2020

scholarly journals Cytotoxicity, Phytochemical, Antiparasitic Screening, and Antioxidant Activities of Mucuna pruriens (Fabaceae)

Plants ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1249 ◽  
Author(s):  
Mahboob Adekilekun Jimoh ◽  
Oladayo Amed Idris ◽  
Muhali Olaide Jimoh
Keyword(s):  
Gallic Acid ◽  
Antioxidant Activities ◽  
Biological Activities ◽  
Mucuna Pruriens ◽  
Total Phenolic ◽  
Dependent Manner ◽  
Concentration Dependent Manner ◽  
Antioxidant Power ◽  
Pharmaceutical Industries

This study aimed at assessing the biological activities of Mucuna pruriens seeds using cytotoxicity, phytochemical, antiparasitic screening, and antioxidant assays. Mature fruits of M. pruriens were harvested from Fort Hare University’s Research Farm located in Alice, South Africa. The collected seeds were pulverized in a standard process and taken to the laboratory for crude extraction and further treatments. Cytotoxic, antimalarial, and trypanocidal effects of crude extracts obtained from ethanol and water were tested, while the total phenolic, proanthocyanidin, and flavonoid contents of the aqueous extracts as well as their pharmacological activities were determined in vitro using 2,2-diphenyl-1-picrylhydrazyl ethanol (DPPH), ferric reducing antioxidant power (FRAP), and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) assays. Although the extracts showed mild antiparasitic (antiplasmodial and trypanocidal) effects, results from the cytotoxic experiment revealed that M. pruriens is not toxic to human cervix adenocarcinoma (HeLa) cells when tested using 50 µg/mL of extracts. It was observed that the seeds were remarkably rich in phenol (3730.1 ± 15.52 mg gallic acid equivalent (GAE)/g) compared to flavonoids (63.03 ± 1.95 mg quercetin equivalent (QE)/g) and proanthocyanidin (18.92 ± 1.09 mg catechin equivalent (CE)/g). Also, the antioxidant activities of the extracts were comparable to those of the standard antioxidant drugs (rutin and gallic acid) used, in a concentration-dependent manner. There was a direct relationship between phenolic acid content and antioxidant effects. It is therefore suggested that M. pruriens seeds be incorporated into human diets as a supplement to promote healthy living. Pharmaceutical industries with a particular interest in natural phenolic acids should consider using seeds of M. pruriens as pharmaceutical precursors.

scholarly journals In vitro antioxidant activities of stem bark, leaves and callus extracts from Amoora rohituka

2017 ◽  
Vol 9 (4) ◽  
pp. 584
Author(s):  
Kanthesh M Basalingappa ◽  
Kavitharaj V ◽  
Avinash KO ◽  
Kumar JR ◽  
Murugesan Karthikeyan ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Gallic Acid ◽  
Methanol Extract ◽  
Antioxidant Activities ◽  
Dry Weight ◽  
Stem Bark ◽  
Weight Basis ◽  
Antioxidative Capacity ◽  
Total Antioxidant

<p><strong>Abstract</strong><strong></strong></p><p>The present work examined the <em>in vitro</em> antioxidant activity of sequentially extracted, solvent extracts (Petroleum ether, chloroform and Methanol) of stem bark, leaves and callus from <em>Amoora rohituka</em>. The antioxidative capacity of the extracts were examined by using DPPH (1,1-diphenyl,2-picryl hydrazyl), ABTS (2,2’-azinobis-3-ethyl-benzothiozoline-6-sulphonic acid) and NOS (Nitric oxide scavenging) assays by using Gallic acid as standard control. Among the tested extracts, methanol extract of stem bark showed better antioxidative capacity. The total antioxidant activity was expressed as µg equivalent of Gallic acid per gram on dry weight basis. IC<sub>50</sub> values for methanol extract of stem bark were 7.53 µg/ml; 34.92 µg/ml and 56.31 µg/ml in ABTS, DPPH and NOS assays respectively. Whereas, leaves and callus extracts showed moderate antioxidative properties. </p>

scholarly journals Gallic Acid-Laminarin Conjugate Is a Better Antioxidant than Sulfated or Carboxylated Laminarin

Antioxidants ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 1192
Author(s):  
Marília Medeiros Fernandes-Negreiros ◽  
Lucas Alighieri Neves Costa Batista ◽  
Rony Lucas Silva Viana ◽  
Diego Araujo Sabry ◽  
Almino Afonso Oliveira Paiva ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Gallic Acid ◽  
Antioxidant Activities ◽  
Mdck Cells ◽  
Brown Seaweed ◽  
Reducing Power ◽  
Lobophora Variegata ◽  
Copper Chelation ◽  
Total Antioxidant

A 12.4 kDa laminarin (LM) composed of β(1→3)-glucan with β(1→6)-branches was extracted from brown seaweed Lobophora variegata and modified via carboxylation using dielectric barrier discharge (LMC), conjugation with gallic acid (LMG), and sulfation (LMS). Analyses of the chemical composition of LMC, LMG, and LMS yielded 11.7% carboxyl groups, 1.5% gallic acid, and 1.4% sulfate content, respectively. Antioxidant activities of native and modified laminarins were assessed using six different in vitro methods. Sulfation stopped the antioxidant activities of LM. On the other hand, carboxylation improved cooper chelation (1.2 times). LMG was found to be a more efficient antioxidant agent than LM in terms of copper chelation (1.3 times), reducing power (1.3 times), and total antioxidant capacity (80 times). Gallic acid conjugation was further confirmed using Fourier transform infrared spectroscopy (FT-IR) and one- and two-dimensional NMR spectroscopy analyses. LMG also did not induce cell death or affect the cell cycle of Madin–Darby canine kidney (MDCK) cells. On the contrary, LMG protected MDCK cells from H2O2-induced oxidative damage. Taken together, these results show that LMG has the potent antioxidant capacity, and, therefore, potential applications in pharmacological and functional food products.

scholarly journals Antioxidants ofPhyllanthus emblicaL. Bark Extract Provide Hepatoprotection against Ethanol-Induced Hepatic Damage: A Comparison with Silymarin

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Renuka Chaphalkar ◽  
Kishori G. Apte ◽  
Yogesh Talekar ◽  
Shreesh Kumar Ojha ◽  
Mukesh Nandave
Keyword(s):  
Gallic Acid ◽  
Ellagic Acid ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Bark Extract ◽  
Total Phenolic ◽  
Phyllanthus Emblica ◽  
Liver Histopathology ◽  
Study Support

Phyllanthus emblicaL. (amla) has been used in Ayurveda as a potent rasayan for treatment of hepatic disorders. Most of the pharmacological studies, however, are largely focused on PE fruit, while the rest of the parts of PE, particularly, bark, remain underinvestigated. Therefore, we aimed to investigate the protective effect of the hydroalcoholic extract ofPhyllanthus emblicabark (PEE) in ethanol-induced hepatotoxicity model in rats. Total phenolic, flavonoid, and tannin content and in vitro antioxidant activities were determined by using H2O2scavenging and ABTS decolorization assays. Our results showed that PEE was rich in total phenols (99.523±1.91 mg GAE/g), total flavonoids (389.33±1.25 mg quercetin hydrate/g), and total tannins (310±0.21 mg catechin/g), which clearly support its strong antioxidant potential. HPTLC-based quantitative analysis revealed the presence of the potent antioxidants gallic acid (25.05 mg/g) and ellagic acid (13.31 mg/g). Moreover, one-month PEE treatment (500 and 1000 mg/kg, p.o.) followed by 30-day 70% ethanol (10 mL/kg) administration showed hepatoprotection as evidenced by significant restoration of ALT (p<0.01), AST (p<0.001), ALP (p<0.05), and TP (p<0.001) and further confirmed by liver histopathology. PEE-mediated hepatoprotection could be due to its free radical scavenging and antioxidant activity that may be ascribed to its antioxidant components, namely, ellagic acid and gallic acid. Thus, the results of the present study support the therapeutic claims made in Ayurveda aboutPhyllanthus emblica.

Evaluation of in vitro Antioxidant Activities of Ethanol Extracts of Datura innoxia Mill. Leaves and Seeds Harvested in Mali

2019 ◽  
pp. 1-8
Author(s):  
Issiaka Togola ◽  
Abdramane Ansoumany Dembélé ◽  
Fatoumata Tounkara ◽  
Nouhoum Diarra ◽  
Mamadou Abdoulaye Konaré ◽  
...  
Keyword(s):  
Gallic Acid ◽  
Antioxidant Activities ◽  
Quantitative Estimation ◽  
Natural Antioxidants ◽  
Datura Innoxia ◽  
Phytochemical Screening ◽  
Plant Materials ◽  
Reducing Ability ◽  
Ethanol Extracts

Aims: The purpose of this study was to evaluate the in vitro antioxidant activities of Datura innoxia Mill. leaves and seeds harvested in Mali. Place and Duration of Study: Collection of plant materials were done at Kolondieba (Mali) in june 2016. Evaluation of polyphenols and flavonoids contents, determination of antioxidant activities were done at Laboratory of Plant and Food Biochemistry and Biotechnology of University of Sciences, Techniques and Technologies of Bamako (Mali) between august 2016 and March 2017. Methodology: The leaves and seeds were collected in Kolondieba, Mali. The phytochemical screening based on the standard methods of tube reactions has been performed with ethanol extracts. The quantitative estimation of total polyphenols was made by the Folin-Ciocalteu method and that of flavonoids by the use of aluminum trichloride. The in vitro antioxidant activities of the ethanol extracts was determined by three methods: the 1,1- diphenyl - 2- picrylhydrazyl (DPPH) test, the ferric reducing ability power (FRAP) test and the Phosphomolybdate test (PPM). Results: The phytochemical screening revealed that leaves and seeds of this plant contains alkaloids, polyphenols, flavonoids, coumarins, tannins, triterpenes and saponin. Phenolic contents of ethanol extracts are 30.97 ± 0.33 mg equivalent gallic acid / g in leaves and 14.02 ± 0.15 mg equivalent gallic acid / g in seeds; those of flavonoids are 15.13 ± 0.2 mg equivalent of quercetin / g in the leaves and 4.93 ± 0.41 mg equivalent of quercetin / g in the seeds. The three tests showed that the leaves have a higher level of antiradical activity in vitro than seeds. Conclusion: The results of this work showed that Datura innoxia Mill. has a good antioxidant activity which would justify its use as a potential source of natural antioxidants.

In vitro and in vivo antioxidant activities of the leaves of Chrysophyllum albidum

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
AH Adebayo ◽  
AO Abolaji ◽  
OO Ayepola ◽  
TB Olorunfemi ◽  
OS Taiwo
Keyword(s):  
Antioxidant Activities

In vitro antioxidant activities of Bauhinia strychnifolia extracts: Comparison with green tea extracts

Planta Medica ◽  
2014 ◽  
Vol 80 (16) ◽  
Author(s):  
A Itharat ◽  
S Sayompark ◽  
P Hansakul ◽  
B Dechayont
Keyword(s):  
Green Tea ◽  
Antioxidant Activities

Phytochemical composition and antioxidant activity of Malus baccata (L.) Borkh. fruits

2020 ◽  
Vol 3 (1) ◽  
pp. 47
Author(s):  
Nadezhda Petkova ◽  
Manol Ognyanov ◽  
Blaga Inyutin ◽  
Petar Zhelev ◽  
Panteley Denev
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Ethanol Extract ◽  
Titratable Acidity ◽  
Total Phenolic ◽  
Total Phenolic Compounds ◽  
Frap Assay ◽  
Phytochemical Composition ◽  
Malus Baccata

Crab apple (Malus baccata (L.) Borkh.) was mainly distributed in Europe as an ornamental plant, but the nutritional properties of its edible fruits were not fully revealed. The aim of the current study was to characterize the phytochemical composition of ripen carb apple fruits and to evaluate their nutritional and antioxidant potentials. The fruits were assayed for moisture and ash content, proteins, lipids, carbohydrates, titratable acidity (TA), pH, total phenolic compounds and natural pigments. Among the analyzed carbohydrates cellulose was found in the highest content (6% dw), followed by sugars (sucrose, glucose and fructose) and 1.8 % dw uronic acids. The total chlorophylls and carotenoids contents in their fruits were 6.51 and 4.80 μg/g fw, respectively. Total monomeric anthocyanins were not detected. The highest content of total phenolic compounds (2.67 mg GAE/g fw) was found in 95 % ethanol extract from fruits, while the total flavonoids were relatively low – 0.1 mg QE/g fw. DPPH assay (17.27 mM TE/g fw) and FRAP assay (14.34 mM TE/g fw) demonstrated in vitro antioxidant activities of crabapple. Malus baccata fruits were evaluated as a rich source of dietary fibers and phenolic compounds with significant antioxidant potential that could be used in human nutrition.

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