scholarly journals In vitro antioxidant properties and inhibitory effect of extracts and fractions of Plectranthus glandulosus leaves on copper sulfate (CuSO4)-induced oxidation in human low-density lipoprotein

2020 ◽  
Vol 10 (4) ◽  
pp. 133-145
Author(s):  
Djamila Zouheira ◽  
Gabriel A Agbor ◽  
Randhir Singh ◽  
Sylviane Laure Poualeu Kamani ◽  
Anu Kajal ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Optical Density ◽  
Research Work ◽  
Antioxidant Properties ◽  
Antioxidant Potential ◽  
Ldl Oxidation ◽  
Scavenger Activity

Oxidation of LDL has been suggested to be an initial step in the development of atherosclerosis. This research work deals with the evaluation of antioxidant potential of Plectranthus glandulosus leaves extracts and fractions as well as its protective effects against human LDL oxidation. A preliminary quantitative phytochemical screening was carried out. Antioxidant potential was evaluated employing in vitro hydrogen peroxide, nitric oxide scavenging assays and TAOC test. The human LDL oxidation induced by CuSO4 inhibition test was also performed. Plectranthus glandulosus leaves exhibited the presence of 18.3% of saponines, 25.6% of terpenoids and 36.2% of flavonoids. EAF exhibited highest hydrogen peroxide and nitric oxide scavenger activity (IC50 13.63µg/ml and 24.59 µg/ml respectively). Ascorbic acid exhibited an IC50 value of 15.39µg/ml in hydrogen peroxide assay and 22.96 µg/ml in nitric oxide scavenging activity. EAF exhibited a higher TAOC (optical density 0.186±0.00) than that of ascorbic acid (0.162±0.001) at the concentration of 25µg/ml while at 200µg/ml N-BUTF exhibited a higher optical density (1.261±0.001) than that of ascorbic acid (1.065±0.001). EAF lengthened the lag time of the CD formation up to 150mins at the concentration 1mg/ml. TBARS formation inhibition at the concentration 0.5mg/ml, were no significant different between n-butanol (68.55%) ethyl acetate fraction (68.21%) and quercetin 67.69%). Plectranthus glandulosus is a promising prospect as an anti-atherosclerotic agent and needs a detailed study to establish the same. Key words: Plecthrantus glandulosus; oxidation; LDL; atherosclerosis, antioxidant.

scholarly journals EVALUATION OF ANTIOXIDANT ACTIVITY OF CHLOROPHYLL

2019 ◽  
Vol 8 (6) ◽  
Author(s):  
Dipti Acharya ◽  
Umesh Kumar Gilhotra ◽  
Ranjan Singh ◽  
Himanshu Rajpurohit ◽  
Ajay Gar
Keyword(s):  
Oxidative Stress ◽  
Nitric Oxide ◽  
Hydrogen Peroxide ◽  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Antioxidant Properties ◽  
Antioxidant Potential ◽  
Methanolic Solution ◽  
Ic50 Value

Antioxidant play an important role to protect damage caused oxidative stress (OS).Chlorophyll having phenolic contents are reported to possess antioxidant properties. The present study was designed to investigate the antioxidant properties of methanolic solution from Super Chlorophyll. Objective: The main objective of the study was to evaluate the antioxidant activity of the chlorophyll in different validated in vitro models. Methods: The antioxidant activities of methanolic solution were evaluated by in vitro standard method using UV-Spectrophotometer. The antioxidant activity were determined bt total antioxidant capacity, DPPH (1-1-diphennyl-2-picrylhydrzine) radical scavenging assay, Nitric Oxide scavenging assay and Hydrogen Peroxide scavenging assay methods. Result: The solution of Chlorophyll was studied for antioxidant potential. Ascorbic acid was used as standard. This method is simple and activity of the solution is reported in term of IC50 value. Antioxidant properties depend on the IC50 value. Lesser the IC50 value, more is the antioxidant activity. Chlorophyll showed good antioxidant activity. Conclusion:  In case of in vitro antioxidant activity, Chlorophyll scavenged DPPH, hydrogen peroxide, nitric oxide radicals significantly, showed IC50 values near to standard ascorbic acid, thus proving to have good antioxidant potential. Keywords: Oxidative stress, DPPH, Antioxidant, Super chlorophyll.

scholarly journals In vitro antioxidant activity of meniran (Phyllantus urinaria) functional drink in human low density lipoprotein (LDL)

2021 ◽  
Vol 913 (1) ◽  
pp. 012093
Author(s):  
U Fitrotin ◽  
N Hilmiati ◽  
Mardiana ◽  
Y Triguna ◽  
A Surahman ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Density Lipoprotein ◽  
Ldl Oxidation ◽  
Functional Drink

Abstract Preparation process for meniran (Phillantus urinaria) functional drink (MFD) influences its antioxidant activity. This research aims to understand the phenolic content, DPPH Radical Scavenging Activity (RSA), and LDL oxidation of MFD through various preparation processes. Those preparation processes included soaking fresh meniran (SFM), boiling fresh meniran for 5 minutes (BFM5’), boiling fresh meniran for 10 minutes (BFM10’), and soaking dried meniran (DM). The phenolic content was determined with Folin–Ciocalteu, antioxidant activity was assessed using DPPH and TBARS assay with LDL as the oxidation substrate. An antioxidant references in this research used ascorbic acid. The phenolic content in methods of SFM, BFM5’, BFM10’ and DM were 122±0.022, 182±0.043, 192 ±0.03, and 117 ±0.019 mg GAE/g of meniran respectively. Meanwhile, the DPPH RSA of SFM, BFM5’, BFM10’ and DM accounted for 82.18±0.35, 86.19±0.53, 86.75±0.64 and 69.96% respectively. As comparison, the DPPH RSA of ascorbic acid 50 ppm is 75.65±0.82%. At the same time the optimum inhibition of TBARS formation from BFM5’ and BFM10’ methods were 45.83 % and 48.66%, with MDA concentration in human LDL accounted for 38.30±2.39 and 36.30±1.82 nmol MDA/mg protein, respectively. As comparison, MDA concentration in human LDL added with ascorbic acid 25 ppm accounted for 41.35±2.41 nmol MDA/mg protein. In contrast, the control human LDL was 70.70±2.35 nmol MDA/mg protein. This study concludes that the BFM5’ and BFM10’ methods showed the highest antioxidant properties compared to other methods. All methods showed that MFD extract in concentration more than 25 ppm increased the concentration of MDA in human LDL. Therefore, to produce meniran functional drink in optimum antioxidant properties is best by using BFM5’ and BFM10’ preparation methods in meniran concentration of not more than 25 ppm.

scholarly journals Evaluation of the antioxidant activity of various extracts of aerial parts of Cassia absus: An in-vitro techniques

2020 ◽  
Vol 11 (2) ◽  
pp. 1545-1550
Author(s):  
Mythri M ◽  
Sanal Dev K T ◽  
Kottai Muthu A
Keyword(s):  
Nitric Oxide ◽  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Antioxidant Potential ◽  
In Vitro Techniques ◽  
Aerial Parts ◽  
Ic50 Value ◽  
Total Antioxidant ◽  
The Difference

Cassia absus (Linn)Cassia absus(Linn) (family Fabaceae ) is generally known as “chaksu ” inan ayurvedic traditional system.The current study,aerial parts of different concentrates(Pet.ether, ethyl acetate and methanol) of Cassia absus, was evaluated for its in-vitro antioxidant potential byDiphenylpicrylhydrazyl radical,nitric oxide activity andtotal antioxidant activitytaking ascorbate as the standardfor all the three methods. The IC50 value was originated that methanolic concentrates of Cassia absusmore efficient inDiphenylpicrylhydrazyl radical,nitric oxide activity, total antioxidant activitycompared EA&PEconcentrates.The methanolic concentrates of Cassia absus& ascorbic acid exhibited antioxidant potential possessing IC50230µg/ml &130µg/ml (Nitric oxide). 205µg/ml &57µg/ml (total antioxidant),195µg/ml & 66µg/ml (Diphenylpicrylhydrazyl radical)respectively. The difference in the scavenging potential of the extracts can be due to variation in the percentage of bioactive compounds present in different solvents. Invitroantioxidant studiesobviouslyshow the methanolic concentrates of Cassia absushave better antioxidant activity. This result indicates that aerial parts of methanolic concentratesCassia absuscould serve as a natural antioxidant, which may be useful in preventfree radical-induced diseases.

scholarly journals PHYTOCHEMICAL EVALUATION AND IN VITRO ANTIOXIDANT STATUS OF CLERODENDRUM VOLUBILE (AN INDIGENOUS MEDICINAL PLANT)

2016 ◽  
Vol 2 (2) ◽  
pp. 77 ◽  
Author(s):  
Tomisin Happy Ogunwa ◽  
Tolulope Tosin Adeyelu ◽  
Rotimi Yemi Fasimoye ◽  
Mary Bose Oyewale ◽  
Taiwo Ademola Ademoye ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Medicinal Plant ◽  
Research Work ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Dry Weight ◽  
Natural Antioxidants ◽  
Therapeutic Effects ◽  
Dpph Radical

ABSTRACTClerodenrum volubile is an important locally used medicinal plant. It is one of the essential herbs nature has provided for mankind to be consumed as spices, vegetable and also used in the treatment of diseases. Qualitative phytoconstituent screening of the plant revealed the presence of steroids, flavonoids, tannins, saponins, and phenolic compound while chalcones, alkaloid and anthraquinone were absent. Quantitative phytochemical evaluation showed values of 8.29±1.26mg/g rutin equivalent for flavonoids, 3.53±0.05mg/g gallic acid equivalent for phenol, 3.97±0.03mg/g tannic acid equivalent for tannins and 13.67±1.27% for saponin per dry weight. As it is imperative to extend research work on therapeutic effects of the arsenal of plants nature has given to us in Africa so as to obtain a cure for various diseases attacking human’s health, antioxidant properties of the plant was evaluated. Antioxidant models used include iron chelating, DPPH radical, superoxide ion, hydrogen peroxide, ABTS radical, hydroxyl radical scavenging activities and ferric ion reducing properties. The obtained IC50 values against DPPH radical were 141.342 and 120.349µg/mL for Clerodendrum volubile and trolox respectively. The chelating effect of the plant extract at 50% inhibition was close to that of ascorbic acid (standard) with 134.34 and 131.19µg/mL concentration respectively. Overall, the aqueous extract of the plant showed antioxidant potential which was close to the effects exerted by known standard antioxidants (ascorbic acid, trolox and EDTA). The plant could hence provide natural antioxidants which are needed to combat numerous free radical-mediated diseases and complications such as aging, cancer, atherosclerosis, which are linked with oxidative stress. 

scholarly journals EVALUATION OF ANTIOXIDANT AND CHEMOPREVENTIVE POTENTIAL OF METHANOLIC EXTRACTS OF LEAF OF AEGLEMARMELOS ATTRIBUTES TOWARDS DUCTAL CARCINOMA STUDIED IN MCF7 CELLS

2018 ◽  
pp. 21-25
Author(s):  
B. Arirudran ◽  
B. Janani ◽  
U. S. Mahadeva Rao
Keyword(s):  
Nitric Oxide ◽  
Mcf7 Cell ◽  
Ductal Carcinoma ◽  
Methanolic Extract ◽  
Research Work ◽  
Antioxidant Potential ◽  
Mcf7 Cells ◽  
Methanolic Extracts ◽  
Ic50 Value

Objective: The objective of the present research work had been made to evaluate the antioxidant potential along with anti-cancer activity of methanolic extracts from the leaf of A. marmelos. Methods: Standard methods for antioxidant potential in terms of DPPH and nitric oxide scavenging assay, and anticancer activity in vitro method (Cytotoxicity/MTT assay and % of cell viability) by using MCF7 cell line. Results: Results of antioxidant efficacy revealed that the IC50 value for DPPH and nitric oxide scavenging assay was considered to be 62.032%, and 20.69% respectively. The methanolic extract of A. marmelos was found to possess enhanced anticancer potential against MCF7 cells. Cytotoxicity activity of MCF7 cells, when treated with methanolic extract of A. marmelos, was found to be 43.42% at 25µg, 52.31% at 50µg, 56.31% at 75µg, 58.38% at 100µg, 62.25% at 125µg. The IC50 value was found as 49.36µg. Toxicity was significantly increased with increased concentration and viability significantly decreased with the increased concentration of methanolic extract of leaf from A. marmelos for MCF7 cell when compared to cyclophosphamide. Conclusion: From the studies, it was postulated that methanolic extract of leaf from A. marmeloshas significant chemopreventive activity. These specific identities will be useful for the identification and authentication of raw drug.

scholarly journals Synthesis of some novel 3- (4-ethoxyphenyl) -5- (4-substituted) -4,5-dihydro-1H-pyrazole derivatives as potent antioxidant agents

2020 ◽  
Vol 11 (2) ◽  
pp. 1571-1577
Author(s):  
Lakshminarayanan B ◽  
Kannappan N ◽  
Subburaju T ◽  
Kalaichelvan V K
Keyword(s):  
Hydrogen Peroxide ◽  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Free Radical ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Assay Method ◽  
Antioxidant Agents ◽  
Ic50 Value

Pyrazolines are the most useful heterocyclic moiety in Pharmaceutical and Chemical fields and as the most potential molecules for the design of new chemical entities. Nitrogen-containing heterocyclic compounds, pyrazolines and their derivatives showed a variety of pharmacological activities, including antioxidant properties. In the present study, eleven novel ethoxylated pyrazoline derivatives were synthesized by condensing chalcones with electron releasingethoxy group at one end and different electron-donating, electron-withdrawing groups in another end with hydrazine hydrate andalcohol. The compounds synthesized were structural elucidated by their spectroscopic studies. All the compounds synthesized were evaluated for their in vitro antioxidant potential by 2,2’-diphenyl-1-picrylhydrazyl (DPPH)and hydrogen peroxide free radical scavenging assay methods.Some of these molecules possess moderate to good antioxidant activitywhen compared to standard ascorbic acid. The compound with methoxy group (EH2) exhibits potent antioxidant activity with IC50 value of 9.02 and 9.44µg/ml in DPPH and hydrogen peroxide assay method respectively and the compound with hydroxy group (EH9) also showed potent antioxidant activity with IC50 value of 12.41 and 14.56µg/ml in DPPH and hydrogen peroxide free radical scavengingassay method respectively when compared to standard. The compounds containing electron-donating substituents were found to be good antioxidantswhen compared to standard ascorbic acid.

scholarly journals PHARMACOGNOSTICAL, PRELIMINARY PHYTOCHEMICAL SCREENING AND IN VITRO ANTIOXIDANT ACTIVITY OF HYDROMETHANOL EXTRACT OF GORDONIA DIPTEROSPERMA KURZ.

2020 ◽  
pp. 35-40
Author(s):  
PHAIBIANG LAPASAM ◽  
ANDREW LALTHASANGA ◽  
FREDDY TEILANG NONGKHLAW ◽  
ZOTHAN PUIA
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Peroxide ◽  
Gallic Acid ◽  
Antioxidant Properties ◽  
Water Soluble ◽  
Total Phenolic ◽  
Phytochemical Analysis ◽  
Phytochemical Screening ◽  
Pharmacologically Active

Objective: This research is to evaluate the pharmacognostic parameter, phytochemical analysis, and in vitro antioxidant properties of hydromethanol extract. Method: This study carries out the collection and authentication of the plant, extraction, pharmacognostic study, preliminary phytochemical screening, and antioxidant property of leaves hydromethanol extract were evaluated by scavenging the following free radicals – DPPH (2,2-diphenyl- 1-picrylhydrazyl), hydrogen peroxide, nitric oxide, and reducing power. One-way analysis of variance (ANOVA) followed by Dunnett’s test was performed. The minimum value of *p˂0.05 considered as significant, **p˂0.01 and ***p˂0.001. Results: Powder microscopy of the leaves showed the presence of stomata, calcium oxalate crystals, trichome, fibers, and oil glands. The total ash was considered to be 3.75%, water-soluble ash 1.25%, and acid-soluble ash 3%. Hydromethanol (3:7) extract yielded 38.8%, moisture content 15.6%. Preliminary phytochemical screening of the extract showed the presence of carbohydrates, glycoside, saponin, phenol, tannin, flavonoid, and steroid. The total flavonoid content was considered to be 32.25 mg/g of quercetin and the total phenolic content of the extract was found 610 mg/g of gallic acid. The IC50 radical scavenging effect of extract and gallic acid was considered to be 3.62 and 3.46 for 2,2-diphenyl-1-picrylhydrazyl, 10.4 and 24.73 for hydrogen peroxide, and 48.76 and 58.83 for nitric oxide. Conclusion: The phytochemical constituents of the extract were well-known pharmacologically active chemicals and significant antioxidant potential was shown by the extract. This study finds out the rationality of the use of this plant as a medicinal plant. Further studies would be needed to explore their potential as a treatment for fever, diarrhea, and dysentery.

scholarly journals In Vitro Antioxidant Properties of Gum Extract From The Carob (Ceratonia silique L.) Plant

2021 ◽  
Vol 34 (1) ◽  
pp. 84-93
Author(s):  
Marwah T. G. Al-Ameri ◽  
Amera K. Nasser
Keyword(s):  
Hydrogen Peroxide ◽  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Antioxidant Properties ◽  
Ferrous Ion ◽  
College Of Agriculture ◽  
Active Compounds ◽  
Significant Difference ◽  
Active Substances

The experiment was conducted in the laboratories of the College of Agriculture, University of Basra, for the period from 22/9/2019 to 25/ 11/2019. The current study aims to extract gum from the carob fruits, to determine the active substances and the possibility of using them as antioxidants. The results showed that the gum of the fruits of the carob plant contains all the active compounds under study, which included Alkaloids, Phenols, Flavonoids, Glycosides, Steroids, Tannins, Resins, Saponins and Coumarins. The results also showed that the gum of the fruits of the carob plant showed antioxidant activity of about 84.55 % when used at a concentration of 0.2 %, while the average antioxidant efficacy of the industrial compound Butylated Hydroxy Toluene (BHT) and Ascorbic acid was about 93.43 %, 91.12 % at the same concentration. The Reductive power were about 73.20 % and 83.30 % with a concentration of 0.1 % and 0.2 % respectively, which was comparable to the effect of industrial antioxidants (BHT) and ascorbic acid with a concentration of 0.2 %, which was 91.40 % and 90.70 %, respectively. In addition, the gum of the fruits of the carob plant has the potential to sweep hydrogen peroxide with a capacity similar to ascorbic acid and without significant difference (p≤0.05), reaching 41 % and 50 % for concentrations 0.1 % and 0.2 %, respectively, while ascorbic acid reached 45 % with the presence of moral differences with the industrial antioxidant (BHT) in its susceptibility to the sweep of hydrogen peroxide at 73 %. The results also showed that the gum of the fruits of the carob plant is able to bind to the Ferrous ion and this portability increased with the increased concentration of gum to reach its highest average of 43.19 % at the concentration of 0.2 % while the average Ferrous ion for antioxidant (EDTA 2Na) was 55.48 %.

The Involvement of Nitric Oxide and Hydrogen Peroxide in eATP-Inhibited Pollen Germination and Tube Growth of Paulownia Tomentosa In Vitro

2011 ◽  
Vol 343-344 ◽  
pp. 347-350
Author(s):  
Yuan Hua Zhang ◽  
Xiao Ping She
Keyword(s):  
Nitric Oxide ◽  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Pollen Germination ◽  
Tube Growth ◽  
Paulownia Tomentosa ◽  
In Vitro Pollen Germination ◽  
Nos Inhibitor

Role of nitric oxide(NO) and hydrogen peroxide(H2O2) in eATP-inhibited reduction of in vitro pollen germination and tube growth of Paulownia tomentosa Steud. were studied. Results showed that exposure of the pollen to a series of eATP (0.2, 0.4, 0.6, 0.8, 1.0 mM) concentration for 3h resulted in not only the reduction of pollen germination but also the reduction of tube growth. Also, NOS inhibitor NG-nitro-L-Arg-methyl eater (L-NAME ), NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3- oxide(c-PTIO) and two scavengers of H2O2, ascorbic acid (ASC) and catalase (CAT) not only largely prevented eATP-inhibited pollen germination but also tube growth. These results indicated that NO and H2O2are involved in eATP inhibited pollen germination and tube growth.

scholarly journals ANTIOXIDANT PROPERTIES OF SINAPIC ACID: IN VITRO AND IN VIVO APPROACH

2017 ◽  
Vol 10 (6) ◽  
pp. 255 ◽  
Author(s):  
Nithya R ◽  
Subramanian S
Keyword(s):  
Antioxidant Properties ◽  
Intraperitoneal Administration ◽  
Radical Scavenging ◽  
Sinapic Acid ◽  
Lipid Peroxides ◽  
Diabetic Rats ◽  
Antioxidant Potential ◽  
Protein Carbonyls

Objective: This study was aimed to evaluate the antioxidant potential of sinapic acid in both in vitro and in vivo. Recently, we have reported that oral administration of sinapic acid (3,5-dimethoxy 4-hydroxycinnamic acid) an active phyto ingredient widely distributed in rye, mustard, berries, and vegetables has been shown to ameliorate hyperglycemia.Methods: Experimental Type 2 diabetes was induced in male Wistar rats by feeding high-fat diet to induce insulin resistance followed by intraperitoneal administration of a single low dose streptozotocin (35 mg/kg body weight [bw]). Sinapic acid was administered orally at a concentration of 25 mg/kg bw/rat/day for 30 days, and its efficacy was compared with metformin. In vitro, antioxidant scavenging properties of sinapic acid were determined using 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS), superoxide, and nitric oxide (NO) assay.Results: Sinapic acid treatment showed a significant decline in the levels of lipid peroxides, hydroperoxides and protein carbonyls in the plasma and vital tissues of diabetic rats. The treatment also improved the antioxidant status in diabetic rats indicating the antioxidant potential of sinapic acid. In addition, the results of DPPH, ABTS, superoxide, and NO radical scavenging assays substantiate the free radical scavenging efficacy of sinapic acid.Conclusion: The results of this study evidenced that sinapic acid possess significant antioxidant properties which in turn may be responsible for its antidiabetic properties.

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