Nitric Oxide Radical Scavenging Assays Research Articles

Compositional, structural, and functional characterization of fucoidan extracted from Sargassum polycystum collected from Saint Martin's Island, Bangladesh

Fucoidan is a sulphated polysaccharide with diversified biological activities commonly found in brown seaweeds. In our present study, fucoidan was extracted from Sargassum polycystum collected from Saint Martin's Island in three different extraction methods. The composition of the fucoidans was determined by measuring the total carbohydrate, sulfate, uronic acid, fucose, and protein contents. Fourier-transform infrared spectroscopy (FT-IR) and Proton nuclear magnetic resonance (1H NMR) were studied to determine the structural groups of extracted fucoidans. Functional activities were analyzed by antioxidant activity and anti-diabetic activity assay. Fucoidan yield was obtained highest in the acid extraction method (0.061 ± 0.007 g/g), followed by the water extraction method (0.058 ± 0.005 g/g) and salt extraction method (0.041 ± 0.005 g/g). Water extracted fucoidan showed the highest carbohydrate content (62.97 %), uronic acid content (6.46 %), and protein content (2.62 %). Sulphate content (28.56 %) was highest in salt extracted fucoidan, whereas fucose content (24.0 %) was highest in water extracted fucoidan. FT-IR and 1H NMR analysis confirm several characteristic picks for the extracted fucoidans. Extracted fucoidans presented comparable antioxidant activity, but salt-extracted fucoidan presented the highest DPPH radical scavenging assay (86.85 ± 0.74 %, IC50 = 0.03 mg/mL), ABTS radical scavenging assay (65.13 ± 0.92 %, IC50 = 1.94 mg/mL), Phosphomolybdenum assay (4.356 ± 0.11) and Nitric Oxide (NO) radical scavenging assay (57.08 ± 0.52 %, IC50 = 3.73 mg/mL) in dose-dependency manner. Further anti-diabetic activity assay resulted in the highest α-amylase inhibition activity (62.82 ± 1.36 %, IC50 = 2.30 mg/mL) and α-glucosidase inhibition activity (55.73 ± 0.84 %, IC50 = 3.71 mg/mL) by salt-extracted fucoidan. These functional potentials of seaweed may add significant value to the development of functional food and pharmaceutical materials.

<i>In Vitro</i> Anti-oxidant and Antidiabetic Activity of the Leaves of <i>Stereospermum sauveolens</i> (Roxb.) DC

Background: Diabetes mellitus is a metabolic condition characterised by a persistent rise in blood glucose levels. Diabetes is just one of the many disorders that can be treated using natural remedies made from plants. Stereospermum suaveolens (Roxb.) DC, belongs to the family Bignoniaceae, commonly known as Padri. It is employed as a folk remedy in southern India to cure diabetes. Aim: The aim of this study is to assess the potential anti-diabetic and antioxidant properties of the hydroalcoholic extract of S. suaveolens (Roxb.) DC leaves through phytochemical screening and in vitro assays. Methods: Leaves of S. suaveolens (Roxb.) DC were collected and processed to obtain a hydroalcoholic extract. The extract was subjected to qualitative analysis to identify the presence of various phytochemical constituents. The free radical scavenging activity of the extract was evaluated using Nitric oxide radical scavenging assay and DPPH racial scavenging assay. In vitro anti-diabetic studies were performed through α-amylase inhibition assay and glucose uptake assay. Results: The hydroalcoholic extract of S. suaveolens (Roxb.) DC leaves exhibited the presence of bioactive compounds. The extract demonstrated dose-dependent free radical scavenging activity in the in vitro antioxidant assays. The extract showed remarkable inhibitory activity against α-amylase, suggesting its potential in controlling carbohydrate digestion. Also the extract significantly enhanced glucose uptake by yeast cells, indicating its potential to regulate blood glucose levels. Conclusion: The findings of this study indicate that the hydroalcoholic extract of S. suaveolens (Roxb.) DC leaves possesses both antioxidant and anti-diabetic properties. These results suggest its potential as a natural medicinal agent for the management and treatment of type 2 diabetes mellitus.

Organic wastes of Citrus sinensis Peels- a source of eco-friendly and sustainable bioactive compounds for promoting health

To determine the phytochemicals, radical scavenging and antioxidant potential of orange peel extract. Citrus sinensis were subjected to extraction with ethanol. Gas chromatography (GC) was utilized to determine the phytochemical composition of orange peel extract. Hydrogen peroxide, superoxide, nitric oxide, and hydroxyl radical scavenging assays were conducted to assess radical scavenging potential of the extract. Antioxidant activities of the peel extracts were determined via the 2,2-diphenylpicrylhydrazyl (DPPH) free radical scavenging activity, ferric reducing antioxidant power (FRAP) assay, ABTS scavenging, and total antioxidant capacity (TAC) assay. The GC-FID analysis revealed the presence of alkaloids, flavonoids, polyphenols, tannins, sapogenin, and steroids in the orange peel extract. The results of radical scavenging assays demonstrated the extract’s ability to scavenge hydrogen peroxide, superoxide, nitric oxide and hydroxyl radicals. The scavenging capacity of the extract was observed to be concentration-dependent, with comparisons made to standard antioxidants ascorbic acid and BHT. Peels from citrus sinensis represent a valuable source of phytochemicals, demonstrating significant antioxidant and radical scavenging activities.

Aminoguanidine Hydrazone Derivatives: The Antioxidant, Antineoplastic Profile, and Interaction with ctDNA Studies

Herein, we report the synthesis and evaluation of four aminoguanidine hydrazone derivatives with different aromatic moieties. This class of compounds presents a series of biological applications. Derivative AGH-3 with an indole nucleus offered the highest antioxidant capacity with results comparable to Trolox in 2,2-diphenyl-2-picrylhydrazyl radical (DPPH• ), 2,2-azinobis(3-ethylbenzothiazoline-6-sulfonic acid (ABTS•+), FeIII reduction assay (FRAP), and nitric oxide (•NO) radical scavenging assays. Furthermore, AGH-3 showed the highest antiproliferative activity against human kidney cancer cells (786-0) with concentration necessary to inhibit 50% cell growth (GI50) = 6.3 µM; additionally, in biophysical studies, AGH-3 interacted with ctDNA (biological target model) forming a fluorescent supramolecular complex with a binding constant (Kb) of 2.89 × 103 M-1 with preferentially an intercalator mechanism. The tested compounds revealed the potential of aminoguanidine hydrazones as a strategic class of compounds with multitarget biological activity.

Antioxidant Effect of Levetiracetam and Brivaracetam Acting on Presynaptic SV2A Receptors: An In-vitro Study

Introduction: Epilepsy is a serious psychological condition associated with social stigma, psychiatric co-morbidity, and a high economic burden. It is pertinent to develop novel treatment methods given the ever-evolving nature of the disease. Recently, various newer Antiepileptic Drugs (AEDs) have been under study, among which a newer targeted modality consists of SV2A receptors. Aim: To compare the antioxidant properties or free radical scavenging activity of the newer heterogeneous AEDs acting on the SV2A receptors, namely Levetiracetam (LEV) and Brivaracetam (BRV). Materials and Methods: This in-vitro study was conducted at Department of Pharmacology, Sri Ramachandra Institute of Higher Education and Research, Chennai, Tamil Nadu, India from July 2021 to August 2021. The study evaluated the antioxidant properties of LEV and BRV using various assays such as the Ferric Reducing Antioxidant Power (FRAP) test, DPPH (1,1-diphenyl-2-picrylhydrazyl) assay, Nitric Oxide (NO) radical scavenging assay, Superoxide Dismutase activity (SOD), and catalase activity. The obtained results were expressed using specific formulas related to the absorbance of the respective chemicals, along with the percentage of inhibition, and have been tabulated in Microsoft excel Sheet Version 16.16.27. Halfmaximal Inhibitory Concentration (IC50) values were calculated using scatter plot graphs. Results: The FRAP values for LEV were reported to be significantly higher compared to BRV at concentrations of 20, 40, 60, 80 μg/mL, while at 100 μg/mL, BRV showed better ferric reducing activity. Although both drugs exhibited antioxidant activity, the results clearly identified LEV as a better NO radical scavenger, with a percentage of inhibition reaching up to 80.52%. During the SOD assay, the percentage inhibition of superoxide generation by LEV was found to be 99.02%, while that of BRV was 97.07% at a concentration of 100 μg/mL. LEV (0.573) also showed a higher degradation of H2O2 per minute than BRV (0.065) at a concentration of 100 μg/mL. Conclusion: The results showed that both drugs, BRV and LEV, exhibited significant antioxidant capacity. However, LEV demonstrated increased antioxidant potency and efficacy compared to BRV.

Antioxidant and Antibacterial potential of Methanol root Extract of Kigelia africana (Sausage tree)

Kigelia africana popularly known as the cucumber or sausage tree that possesses medicinal and traditional uses like anticancer, antiulcer, anti-aging, antioxidant, and anti-malarial activity.This study aimed to investigate GCMS, FTIR, Antioxidant and Antibacterial properties of methanolic root extract of Kigeliaafricana.The antioxidant activity of root extracts of Kigelia was evaluated by 1, 1-diphenyl-2-picrylhydrazyl (DPPH) free radical assay, Reducing power (PR) assay, Ferric Reducing Power assay and Nitric oxide (NO) radical scavenging assay. Ascorbic acid was used as a standard antioxidant. GCMS analysis reveals the presence of 9-Octadecanoic acid (z)-methyl ester while theFTIR spectral analysis identify some functional group such as hydroxyl group, Carboxyl group, methyl group, carbonyl group, amino group, and phosphate group. In vitro antibacterialactivityof the extracts wastestedagainst4bacterialstrains viz; Staphylococccus aureus, Escherichia coli, Pseudomonas aeruginosa, and Salmonella spp.The highest antibacterial activity was found against Staphylococcus aureus then followed by Pseudomonas aeruginosa, Salmonella spp and Escherichia coli. The extract showed much higher scavenging activity against DPPH and with most reducing power against ferric cyanide. This study reveals the potency of the root of K. africana to be used as a good natural source for antioxidant and antibacterial activity.

Evaluation of Toxicity and Antioxidant Activity of Hydro-Ethanol Leave Extract of Mentha piperita

Mentha piperita has numerous pharmacological, cosmetic and alimental applications due to its ability to produce terpene and terpenoid compounds. Antioxidants are considered as important bioactive compound on account of many health benefits along with their vital role in delaying oxidative rancidity of numerous food. The study was to investigate acute toxicity evaluation and in vitro antioxidant activity of hydro-ethanol leave extracts of M. piperita. The acute toxicity was evaluate in rat according to (OECD). Animals were daily observed for 24 hours after treatment for mortality. The antioxidant activity of the extract was evaluated based on the method such as DPPH radical scavenging activity and reducing power method. The results showed that mortality was not observed in phase one but was observed in phase two. The LD50 by oral route in rat was less than 5000 mg/kg body weight. The percentage of antioxidant activity of leaf extracts of M. piperita was assessed by 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical assay, reducing power (RP) assay, ferric reducing/antioxidant power assay, and nitric oxide (NO) radical scavenging assay. The analysis revealed that NO scavenging activity is higher than DPPH with extract. NO and DPPH exhibited remarkable antioxidant activity. This indicates that the hydro-ethanol leave extract of M. piperita has a good antioxidant activity.

Evaluation of Antioxidant and Anti-diabetic Activity of Stem Bark of <i>Ziziphus jujuba</i> (L.) Gaertn

Diabetes Mellitus (DM), a significant metabolic disorder that increases mortality and morbidity, affects people all over the world. Recently, many individuals are exploring CAM treatment that may have fewer side effects due to the prominent side effects of allopathic medications. Ziziphus jujuba (L.) Gaertn. (Rhamnaceae) stem bark has been a vital part of the conventional system of medicine for the management of diabetes, inflammation, wounds, fever, asthma and liver disorders. In spite of its pharmacological significance, Ziziphus jujuba stem bark lacks scientific evidence of its antidiabetic and antioxidant potential. Hence, an attempt has been made to evaluate the anti-diabetic effect of the stem bark of Ziziphus jujuba using alpha-amylase inhibition assay. In this research work, we further investigated the antioxidant activity of the Ziziphus jujuba using DPPH and Nitric oxide radical scavenging assay. The Chloroform (CEZJ), ethyl acetate (EAZJ) and Ethanol (EEZJ) extracts of Ziziphus jujuba stem bark were used in the study. In the DPPH radical scavenging assay, EEZJ had an IC50 value of 117.1 µg/ml, however, the value for the nitric oxide scavenging assay was 64.65 µg/ml. The Ziziphus jujuba was additionally examined for its in-vitro antidiabetic potential using an alpha-amylase inhibition assay, and it was discovered to possess a considerable percentage of alpha-amylase inhibition. The IC50 of EEZJ was found to be 34.68 µg/ml. These results imply that the Ziziphus jujuba possesses considerable antioxidant and anti-diabetic properties. To thoroughly establish the anti-diabetic potential of Ziziphus jujuba, additional in vitro experiments utilizing cell lines and other enzymes may be conducted.

Antioxidant, Antiproliferative, Pro-apoptotic and cell cycle arrest properties of crude extract and biofractions of Hybanthus enneaspermus Linn. to combat breast cancer

Objective: According to the World Health Organisation, breast cancer is presently the most common cancer diagnosed in women globally. Polyphenolic compounds act as antioxidants, improve health, and reduce risk and proliferation of various types of cancers. Hybanthus enneaspermus Linn. is a beneficial medicinal plant, reported to possess antimicrobial, antioxidant, anti-inflammatory, neuroprotective, cardioprotective, and nephroprotective properties etc. Methods: The current study involved the evaluation the antioxidant, antiproliferative, apoptotic and cell cycle arrest potential of the ethanolic leaf extract of Hybathus enneaspermus Linn. (EEHE), its toluene soluble, toluene insoluble, ethyl acetate and methanol soluble biofractions viz. TFHE, ITHE, EFHE, and MFHE to combat breast cancer. In vitro antioxidant activities were evaluated using DPPH, Hydrogen peroxide, Nitric oxide and ABTS free radical scavenging assays. In vitro antiproliferative activity against MCF-7 cells was assayed using the Sulforhodamine method, while apoptosis and cell cycle assays were analysed by flow cytometry. Results: MFHE exhibited significant in vitro antioxidant activity with IC50 values of 21.10±0.39 μg/mL and 25.99±4.66μg/mL, when compared against standard ascorbic acid with IC50 values of 11.19±1.09 μg/mL and 9.30±0.26μg/mL in DPPH and nitric oxide assays respectively. EFHE displayed substantial antioxidant potential in ABTS and hydrogen peroxide assays with IC50 values of 40.38±0.88μg/mL and 99.11± 13.59μg/mL, while ITHE showed considerable activity with IC50 < 100μg/mL in DPPH, nitric oxide and ABTS assays. TFHE demonstrated significant antiproliferative activity by sulforhodamine assay, with GI50 value of 10.22 6.72µg/mL, while EEHE and ITHE showed substantial activity with GI50 values of 41.42±3.74µg/mL and 64.37±7.07µg/mL respectively, as against the standard drug Adriamycin (GI50 < 10µg/mL) used. In the apoptosis assay, ITHE showed 11.31±0.82% cells in late apoptosis and 34.48±1.57 % cells in necrosis as compared to standard Adriamycin indicated 13.67±1.02 % cells in late apoptosis and 8.58±0.65 % cells in necrosis. In cell cycle analysis, ITHE displayed significant apoptotic activity with 20.15±1.37 % cells in SubG1 phase and 13.99±1.65 % cells arrested in G2-M phase as compared to the control. Conclusion: The study thus revealed that MFHE, EFHE and ITHE biofractions showed significant antioxidant activities, while EEHE, TFHE and ITHE exhibited substantial antiproliferative activity against mammary cancer cells. Additionally, ITHE induced remarkable apoptotic activity and cell cycle arrest in the MCF-7 cells. The therapeutic benefits may be credited to the bioactive constituents present in the ITHE fraction viz. polyphenolics, flavonoids etc.; however, the molecular mechanisms may need to be evaluated further.

Biochemical Screening, Fabrication of Green Nanoparticles and Its Antimicrobial, and Antioxidant Studies of Endophytic Fungus Phlebia Species.

Endophytes are organism dwelling totally dynamic and novel biotopes this makes them able to produce novel biochemicals that may become assets to the future. This study aims at understanding the biochemical components of the endophytic fungus Phlebia sp. synthesis of gold and silver nanoparticles from it, and the antimicrobial as well as antioxidant ability of these green synthesised nanoparticles. Aqueous fungal extract was subjected for HRLCMS analysis which revealed 34 biochemicals within the extract. Silver and gold nanoparticles were also produced from the fungal extract. UV-vis analysis revealed a peak at 450nm for silver nanoparticle and 550nm for gold nanoparticles. FESEM analysis confirmed the presence of these nanoparticles with its spherical shape. Both of these nanoparticles were able to produce a conspicuous zone of inhibition in the antimicrobial tests against Escherichia coli, Salmonella paratyphi. For both of the organisms under study, a concentration-dependent expansion of the zone of inhibition was discovered in the nanoparticles. However, with silver nanoparticles, a relatively high zone of inhibition and vulnerability of the organism was discovered. Four in vitro free radical scavenging assays, including the DPPH, Hydroxyl, Superoxide, and Nitric oxide radical scavenging assays, were used for antioxidant analysis. The results of every test demonstrated that green synthesisedsilver nanoparticles had higher activity than gold nanoparticles. All of the tests showed that silver nanoparticles were more active than gold nanoparticles with the maximum value of 86.254 ± 0.296% being discovered at the greatest concentration of superoxide radical scavenging assay.

In- vitro Antioxidant and Anti-aging activity of a Traditional Ayurvedic Formulation

Aging is an inevitable process for all living organisms. When the skin ages, Reactive Oxygen Species (ROS) are generated, which results in an increase in Hyaluronidase, Collagenase and Elastase, further contributing to skin aging. Amalaki Rasayana (AR) which is a traditional Ayurvedic preparation was investigated to assess its anti-oxidant and anti-aging properties. In order to assess radical scavenging activity, plant extracts/formulations were tested for their ability to scavenge DPPH and nitric oxide radicals. The alcoholic extract was prepared with Amalaki Rasayana (AR) and used for phyto-chemical, anti- oxidant and anti- aging studies. The phyto-chemical screening revealed the presence of tannins, alkaloids and flavonoids. The in- vitro anti- oxidant activity of Amlaki Rasayana (AR) was carried out by DPPH and Nitric oxide radical scavenging assay method. The DPPH assay revealed the concentration dependent scavenging activity with the extract and the results are comparable with standard quercetin. The percentage inhibition was more at 1000 μg/ml of the ethanol extract in Nitric oxide scavenging assay. The in- vitro anti- aging potential was evaluated by anti- collagenase assay method using FALGPA as substrate. The ethanol extract exhibited significant inhibition on collagenase enzyme which was comparable to standard EDTA. The ethanol extract of Amlaki Rasayana (AR) showed significant anti- oxidant and anti- aging activity which may be attributed to phyto- constituents such as flavonoids, alkaloids and tannins. This study offers scientific validation of Amlaki Rasayana (AR) for anti- aging activity and can be recommended to be taken internally for aging problems.

A Study on Phytochemical and Antioxidant properties of the Leaves of Ficus hispida Linn.

Ficus hispida Linn. is a small but well-distributed species of the tropical fig tree. Although used in traditional medicine to treat many ailments, there is a lack of system reports about the phytochemical and antioxidant properties of the leaves of that plant. This study was conducted to investigate the phytochemical and antioxidant properties of F. hispida leaves using four different solvents (methanol, ethanol, chloroform, and petroleum ether). Qualitative and quantitative analysis are performed to determine the presence and content of phytochemicals. Four in vitro assay models were used to investigate the antioxidant activity. Phytochemical experiments confirmed the presence of alkaloids, flavonoids, flavonols, resins, saponins, proanthocyanidins, glycosides, steroids, and tannins. Qualitative analysis showed the total content of polyphenols such as phenolic, flavonoids, flavonols, and proanthocyanidin in those extracts. Among all the Extracts, ethanol extracted from the leaves of F. hispida has shown superior activity in the testing of the total antioxidant capacity assay. In DPPH and ABTS scavenging, ethanol extracted from F. hispida leaves shows the highest scavenging activity among all extractions with IC50 values of 50.33±2.59μg/ml and 83.35±1.98μg/ml respectively. Although in Superoxide radical scavenging assay and Nitric Oxide radical scavenging assay, methanol extraction of F. hispida leaves exhibit with an IC50 value of 104.17±3.49μg/ml and 108.98±4.66μg/ml.

In Vitro Antioxidant and Fibroblast Migration Activities of Fractions Eluded from Dichloromethane Leaf Extract of Marantodes pumilum.

(1) The complexity of diabetes and diabetic wound healing remains a therapeutic challenge because proper and systematic wound care and management are essential to prevent chronic microbial infection and mechanical damage to the skin. Marantodes pumilum, locally known as 'Kacip Fatimah', is an herb that has been previously reported to possess anti-inflammatory, analgesic, antinociceptive and antipyretic properties. The current study aims to assess the antioxidant and fibroblast cell migration activities of the fractions eluded from the dichloromethane extract of M. pumilum leaves. (2) The total antioxidant capacity of M. pumilum was assessed using the total proanthocyanidins and phosphomolybdenum assays, while DPPH, nitric oxide, hydrogen peroxide and superoxide free radical scavenging assays were tested to determine the antioxidant potential of M. pumilum. An in vitro scratch wound assay was performed to measure the fibroblast cell migration rate using normal and insulin-resistant human dermal fibroblast cells. (3) All M. pumilum fractions exhibited good antioxidant and fibroblast cell migration activity, among which fractions A and E displayed the greatest effect. (4) M. pumilum's fibroblast migration activity could be attributed to its strong antioxidant properties along with its previously reported properties.

Myrothamnus flabellifolius Welw. (Myrothamnaceae) essential oil scavenges free radicals and inhibits carbohydrate-metabolizing enzymes in vitro

ABSTRACT Myrothamnus flabellifolius is an important medicinal plant traditionally used in southern Africa to treat an array of diseases, including diabetes mellitus. This study investigates the chemical compositions, antioxidant activity, and the inhibition of carbohydrate-metabolizing enzymes by essential oil from Myrothamnus flabellifolius leaves (MFEO). The oil extracted by hydrodistillation was analyzed by gas chromatography – flame thermionic detector (GC – FTD) and GC – mass spectrometry (GC – MS). The antioxidant and antidiabetic activities of the oil were carried out using standard in vitro methods. MFEO displayed potent antioxidant effects more than standards for superoxide anion, nitric oxide, metal chelation, and hydroxyl radical scavenging assays with half-maximal inhibitory concentration (IC50) values 0.23, 0.71, 0.58, and 0.43 mg/mL respectively. The oil also displayed significantly higher (p < 0.05) inhibition of α-glucosidase and α-amylase enzymes than acarbose, with IC50 values of 0.52 and 0.59 mg/mL, respectively. The chemical analysis of MFEO revealed the presence of twenty (20) compounds dominated mainly by monoterpenes and non-terpenoid derivatives. The major oil constituents were β- myrcene (37.1%), mentha-1,5,8-triene (24.9%), and α-pinene (10.80%). Some of these identified components have been reported to be antioxidative and antidiabetic, buttressing the displayed effects of MFEO.

Pharmacological Prospects of Morin Conjugated Selenium Nanoparticles-Evaluation of Antimicrobial, Antioxidant, Thrombolytic, and Anticancer Activities.

Selenium nanoparticles (SeNPs) have gained wide importance in the scientific community and have emerged as an optimistic therapeutic carrier agent for targeted drug delivery. In the present study, the effectiveness of nano selenium conjugated with Morin (Ba-SeNp-Mo) produced from endophytic bacteria Bacillus endophyticus reported in our earlier research was tested against various Gram-positive, Gram-negative bacterial pathogens and fungal pathogens that showed good zone of inhibition against all selected pathogens. Antioxidant activities of these NPs were studied by 1, 1-diphenyl-2- picrylhydrazyl (DPPH), 2,2'-Azino-bis-3-ethylbenzothiozoline-6-sulfonic acid (ABTS), hydrogen peroxide (H2O2), superoxide (O2-), and nitric oxide (NO) radical scavenging assays that exhibited dose-dependent free radical scavenging activity with IC50 values 6.92 ± 1.0, 16.85 ± 1.39, 31.60 ± 1.36, 18.87 ± 1.46, and 6.95 ± 1.27 μg/mL. The efficiency of DNA cleavage and thrombolytic activity of Ba-SeNp-Mo were also studied. The antiproliferative effect of Ba-SeNp-Mo was determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay in COLON-26 cell lines that resulted in IC50 value of 63.11 μg/mL. Further increased intracellular reactive oxygen species (ROS) levels up to 2.03 and significant early, late and necrotic cells were also observed in AO/EtBr assay. CASPASE 3 expression was upregulated to 1.22 (40 μg/mL) and 1.85 (80 μg/mL) fold. Thus, the current investigation suggested that the Ba-SeNp-Mo has offered remarkable pharmacological activity.

Phytochemical Screening and Antioxidant potential of Lepidagathis spinosa Wight ex Nees., Whole plant - In vitro method

Aim: To assess the phytoconstituents, total flavonoid, phenolic content and in vitro antioxidant activity of Lepidagathis spinosa wight ex Nees. (L.spinosa). Objective: To assess the phytochemical content and antioxidant activity of L. spinosa with different solvents like petroleum ether, chloroform, ethyl acetate and hydro alcohol extracts. Total phenolic and flavonoid contents were assessed using spectrophotometric method. The total antioxidant capacity and free radical scavenging activities of various extracts were estimated against DPPH, Hydroxy radical and Nitric oxide radical scavenging assays. Results: The hydro alcohol extract of the whole shrub revealed the maximal polyphenol content when correlated with the other solvent extracts. Total phenolic content of the hydro alcohol extract was found to be 33.53 of GAE/g dry weight of samples. Flavonoid content was found to be 19.63333 mg of quercetin equivalents/g dry weight of the extract. All the extracts were exposed significant antioxidant activity and hydro alcohol extract showing highest antioxidant ability in association with the polyphenol contents. Based on the IC50 values, hydro alcohol extract of the plant revealed the potent DPPH, Hydroxy radical, Nitric oxide radical scavenging ability. Conclusion: This study suggests that hydro alcohol extract of L. spinosa could be a potential source of natural antioxidant and justifies its traditional use in ethnomedicine.

Methanolic fraction of Cassia fistula L. bark exhibits potential to combat oxidative stress and possess antiproliferative activity

ABSTRACT Cassia fistula L. is well known for its traditional medicinal properties as an anti-inflammatory, hepatoprotective, antifungal, antibacterial, antimutagenic, and wound healing agent. The aim of the present study was to determine antioxidant, genoprotective, and cytotoxic potential of different fractions of C. fistula bark including hexane (CaMH), chloroform (CaMC), ethyl acetate (CaME), and methanol (CaMM). Among all the fractions studied, CaMM exhibited maximal radical scavenging activity in antioxidant DPPH assay, Superoxide anion radical scavenging assay and nitric oxide radical scavenging assay displayed an IC50 value of 18.95, 29.41, and 13.38 µg/ml, respectively. CaMM fraction possessed the highest phenolic (130.37 mg gallic acid equivalent/g dry weight of extract) and flavonoid (36.96 mg rutin equivalent/g dry weight of fraction) content. Data demonstrated significant positive correlation between polyphenol levels and radical scavenging activity. Single cell gel electrophoresis (Comet assay) exhibited genoprotective potential of C. fistula bark fractions against DNA damage induced by hydrogen peroxide (H2O2) in human lymphocytes. CaMM fraction displayed highest protective ability against H2O2 induced-toxicity as evidenced by significant decrease in % tail DNA content from 30 to 7% at highest concentration (200 µg/ml). CaMM was found to be rich in catechin, gallic acid, chlorogenic acid, and kaempferol. The phenolic content and antioxidant ability of the fractions was markedly negatively correlated with H2O2- induced DNA damage in human lymphocytes. Cytotoxic potential was evaluated against dermal epidermoid carcinoma (A431), pancreatic (MIA PaCa-2) and brain glioblastoma (LN-18) cancer cell lines using MTT assay. Results showed that C. fistula bark fractions possessed highest toxicity against the skin carcinoma cells. CaMM fraction reduced over 50% cell growth at the concentration of 76.72 µg/ml in A431 cells. These findings suggest that fractions of C. fistula bark exhibit potential to be considered as therapeutic agents in various carcinomas.

A Comparative Study on the Antioxidant and Antidiabetic Activities off Ethanolic Leaf Extracts of Psidium Guajava L. Varieties

Antioxidants play an important role in protecting the cell from damage caused by oxidative stress (OS). Plants have potential phytochemicals, which possess antioxidant properties. The present study was designed to investigate the screening of phytochemcials, antioxidant, and antidiabetic properties of ethanolic leaf extracts of Psidium guajava varieties (Lucknow 49 and TRY G1). The leaf extracts were screened for various phytochemicals (alkaloids, flavonoids, saponin, phenols and glycosides) and antioxidant activities. Antidiabetic actives were evaluated by in vitro analysis using standard protocols. The antioxidant activities were determined by DPPH (1,1-diphenyl-2-picrylhydrazine) radical scavenging assay, superoxide radical scavenging assay and nitric oxide radical scavenging assay methods. The phytochemicals screening of the extracts revealed the presence of alkaloids, flavonoids, saponin, phenols, tannins, and glycosides. Among the varieties, Lucknow 49 had higher level of α-amylase inhibitor activity of 62.46 and α -glucosidase inhibitor activity of 98.40 at 100 μg/mL than TRY G1. Both the varieties of the extracts showed antioxidant activities in dose dependent manner, and values were compared with standard ascorbic acid. Lucknow 49 showed the maximum DPPH (60.68%), superoxide radical (65.67%) and nitric oxide radical(61.36%) scavenging activities than TRY G1 variety. The IC50 values of the variety Lucknow 49 were also confirmed antioxidant potentials. The results indicate that both the varieties of Psidium guajava had significant antioxidant and antidiabetic potentials, hence the plant leaves could serve as effective antidiabetic agents and potent free radical scavengers, which may be used for pharmaceutical applications. However, further exploration is necessary for effective usage in both traditional and modern system of medicines.

In Vitro Antioxidant Properties and Methylglyoxal (MGO) Scavenging Effects of Centella asiatica Leaves in Water Extract

Introduction: Advanced glycation end product (AGE) is formed by the non-enzymatic glycation, leading to free radicals’ production and high oxidative stress. Accumulation of AGEs is associated with chronic diseases which are correlated with diabetes mellitus. Centella asiatica is a traditional medicinal herb used in Asia with numerous pharmacological effects such as antioxidant, wound healing, neuroprotective, and gastrointestinal treatment. This research was aim to evaluate the antioxidant, antiglycation, and phytochemical analysis of C. asiatica leaves (L.) water extract. Methods: The antioxidant activity of the plant extract was evaluated through 2,2-diphenyl-1-picrylhydrazyl (DPPH), hydroxyl (OH) radicals, nitric oxide (NO), and chelating capacity assays. Total phenolic content (TPC) was performed to determine the presence of bioactive compounds, such as saponins, which have been extensively reported in previous studies. Butylated hydroxytoluene (BHT) and ethylenediaminetetraacetic acid (EDTA) were used as positive control in the antioxidant assays, while quercetin was used in the antiglycation assays. Antiglycation effects of C. asiatica L. were evaluated through Bovine serum albumin (BSA)-MGO, BSA-glucose, and MGO scavenging assay. The data was expressed in terms of IC50. Result: The plant extract possessed significantly (p &lt; 0.001) lower IC50 value compared to the BHT in DPPH and NO radical scavenging assay. It also showed stronger antiglycative effect with lower IC50 value compared to the quercetin in BSA-glucose and BSA-MGO assay. The TPC of C. asiatica L. was 3.20 mg/GAE/g at 100µg/ml. Conclusion: The antiglycation effects of C. asiaitca L. include the reduction of Amadori products formation, trapping α-dicarbonyl intermediates, and free radical scavenging. It is suggested that the antiglycation effects of C. asiatica L. maybe attributed by the presence of saponins and other phytochemicals.

Antibacterial and antioxidant efficacy of ethyl acetate extract of Cymodocea serrulata and assess the major bioactive components in the extract using GC-MS analysis

The emergence of drugs from marine sources, particularly marine plants, has increased in recent years. Hence, the purpose of this study was to assess, evaluate the phytochemical profile, antibacterial, and antioxidant activity of Cymodocea serrulata extract. Furthermore, qualitatively analyzed the predominant components present in the extract which showed considerable antibacterial and antioxidant activities. The qualitative phytochemical analysis results revealed that the ethyl acetate extract contained more number of pharmaceutically valuable phytochemicals than other solvent extracts. The ethyl acetate extract showed excellent antibacterial activity against S. aureus (20 mm) followed by P. aeruginosa (18.11 mm), E. coli (17.20 mm), B. subtilis (17.11 mm), C. diphtheriae (17.10 mm) and C. pneumoniae (17.0 mm) at the concentration of 75 mg ml−1. The antioxidant activity results revealed that the crude ethyl acetate extract of C. serrulata demonstrated significant free radicals scavenging activity ranging from 25.562 ± 1.62 %, 63.615 ± 1.02 %, 75.524 ± 0.48 %, and 88.048 ± 1.28 % for DPPH, FRAP, H2O2, and nitric oxide radicals scavenging assays at the concentration of 100 mg ml−1 respectively. Furthermore, the GC-MS analysis results revealed that the ethyl acetate extract contained 14 major components, the majority of which had previously been identified as pharmaceutically valuable components. These findings concluded that the components present in the ethyl acetate extract of C. serrulate have pharmaceutical value and may be useful to the humanity.