Antioxidant and Cytotoxic Effects of Crude Extract, Fractions and 4-Nerolidylcathecol from Aerial Parts ofPothomorphe umbellataL. (Piperaceae)

The crude ethanolic extract from aerial parts ofPothomorphe umbellataL. (Piperaceae) and fractions obtained by partitions sequentially among water-methanol, methylene chloride, and ethyl acetate, as well as the major constituent, 4-nerolidylcatechol, were, respectively, evaluated and evidenced for antioxidant and cytotoxic effects through fluorometric microplate and microculture tetrazolium assays in HL-60 cells. The crude ethanolic extract demonstrated the preeminent antioxidant activity (IC50=1.2 μg/mL) against exogenous cytoplasmic reactive oxygen species, followed by the water-methanolic (IC50=4.5 μg/mL), methylene chloride (IC50=5.9 μg/mL), ethyl acetate (IC50=8.0 μg/mL), 4-nerolidylcatechol (IC50=8.6 μg/mL), and the sterol fractions (IC50>12.5 μg/mL). Vitamin C, the positive control used in this assay, presented IC50value equivalent to 1.7 μg/mL. 4-Nerolidylcatechol (IC50=0.4 μg/mL) and methylene chloride fraction (IC50=2.3 μg/mL) presented considerable cytotoxicity probably because of the presence of ano-quinone, an auto-oxidation by product of the catechol. Polar compounds, present in the ethanol extract, appear to increase the solubility and stability of the major active constituent, acting synergistically with 4-nerolidylcatechol, improving its pharmacokinetic parameters and increasing significantly its antioxidant activity which, in turn, suggests that the aqueous-ethanolic extract, used in folklore medicine, is safe and effective.

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Antioxidant Activity, Inhibition α-Glucosidase of Ethanol Extract of Strychnos nitida G. Don and Identification of Active Compounds

Current Biochemistry ◽

10.29244/cb.5.3.11-20 ◽

2019 ◽

Vol 5 (3) ◽

pp. 11-20

Author(s):

Stefani Dhale Rale ◽

Hasim Hasim ◽

Syamsul Falah

Keyword(s):

Antioxidant Activity ◽

Ethyl Acetate ◽

Ethanol Extract ◽

Ethyl Acetate Fraction ◽

Inhibition Activity ◽

Active Compounds ◽

Activity Inhibition ◽

Activity Test ◽

Ic50 Value ◽

Treatment Of Diabetes

This study aims to find the treatment of diabetes using natural materials by exploring plants in the province of East Nusa Tenggara. his research was conducted out by extracting the Strychnos nitida G.Don stem using a method of maceration by ethanol 70%. Ethanol extract was then fractionated using n-hexane and ethyl acetate. Simplicia from maceration and fractionation results were then tested for antioxidant activity, α-glucosidase inhibition activity and identification of active compounds. The results showed that ethyl acetate fraction had the lowest IC50 value of 86.83 μg / ml. Results of the α-glucosidase activity test showed that ethyl acetate fraction and n-heksan fraction at 900 ppm had the highest percentage of inhibition of 34.23% and 33.89%. Identification using LCMS/MS method showed that ethyl acetate fraction consist of Benzenemethamine, N, N-dioctyl- as an antioxidantcompound and compound 24-methyl-5-cholestone-hexol as an antidiabetic compound. From the results of this study, we concluded that the extract of kayu ular Strychnos nitida G.Don stem has inhibition activity toward α-glucosidase enzyme.

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UJI AKTIVITAS ANTIOKSIDAN FRAKSI N-HEKSAN DAUN AFRIKA (Vernonia amygdalina Del.) DENGAN METODE DPPH

Jurnal Ilmiah Ibnu Sina (JIIS): Ilmu Farmasi dan Kesehatan ◽

10.36387/jiis.v5i2.466 ◽

2020 ◽

Vol 5 (2) ◽

pp. 250-257

Author(s):

Nurul Fatimah ◽

◽

Reksi Sundu

Keyword(s):

Oxidative Stress ◽

Antioxidant Activity ◽

Free Radicals ◽

Ethanolic Extract ◽

Ethanol Extract ◽

Hexane Fraction ◽

Phytochemical Screening ◽

Vernonia Amygdalina ◽

Tropical Africa ◽

Ic50 Value

Free radicals and reactive species are widely believed to contribute to the development of several diseases by causing oxidative stress and eventually oxidative. Vernonia amygdalina (Astereacea) is a small shrub or tree between 1 and 5m high growing throughout tropical Africa. Plants are generally known as bitter leaves is well cultivated and is a general market for merchandise in several countries. The purpose of this study was to determine the antioxidant activity of hexane fraction from ethanol extract od Frican leaves (Vernonia amygdalina Del.). The method used in this study was the DPPH (1,1-Diphenil-2-Picrylhydrazyl) method. The result of phytochemical screening showed that ethanolic extract of African leaves contained a composition of secondary metabolites of alkaloids, flavonoids, tannins, steroids/triterpenoids and saponins. The antioxidant activity of the extract of n-hexane fraction was classified as very weak with an IC50 value of 317.98 ppm.

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Comparative Antioxidant Activity on The Ficus benjamina and Annona reticulata Leaves

International Journal of Public Health Science (IJPHS) ◽

10.11591/ijphs.v4i1.4707 ◽

2015 ◽

Vol 4 (1) ◽

pp. 21

Author(s):

Nyi Mekar Saptarini ◽

Irma Erika Herawati

Keyword(s):

Antioxidant Activity ◽

Ethyl Acetate ◽

Ethanolic Extract ◽

Natural Antioxidants ◽

Ethyl Acetate Fraction ◽

Hexane Fraction ◽

Ficus Benjamina ◽

Water Fraction ◽

Free Radical Formation ◽

Annona Reticulata

Antioxidants can prevent free radical formation. Natural antioxidants found in many plants, such as Ficus benjamina and Annona reticulata. The study aimed to compare the antioxidant activity of extracts and fractions of Ficus benjamina and Annona reticulata leaves against 1,1-diphenyl-2-picrilhydrazyl. The steps of this study consist of extraction, fractionation with n-hexane, ethyl acetate and water, phytochemical screening, antioxidant activity determination, and comparing the IC50 values. Percentage scavenging activity of the extracts and fractions against DPPH was calculated to determine the antioxidant activity. The IC50 value of Ficus benjamina was 127.86 ppm for ethanolic extract, 94.01 ppm for water fraction, 115.48 ppm for ethyl acetate fraction, and 335.50 ppm for n-hexane fraction. The IC50 value of Annona reticulata was 274.31 ppm for ethanolic extract, 211.42 ppm for water fraction, 367.91 ppm for ethyl acetate fraction, and 741.08 ppm for n-hexane fraction. The results showed that the Ficus benjamina water fraction was the best antioxidant compared to other extract and fraction.

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Antioxidant activity test of ethyl acetate fraction of binjai (Mangifera Caesia) leaf ethanol extract

Dental Journal (Majalah Kedokteran Gigi) ◽

10.20473/j.djmkg.v51.i4.p164-168 ◽

2018 ◽

Vol 51 (4) ◽

pp. 164

Author(s):

K. Khairiah ◽

Irham Taufiqurrahman ◽

Deby Kania Tri Putri

Keyword(s):

Antioxidant Activity ◽

Ascorbic Acid ◽

Ethyl Acetate ◽

Secondary Metabolite ◽

Antioxidant Properties ◽

Linear Connection ◽

Sampling Technique ◽

Ethanol Extract ◽

Ethyl Acetate Fraction ◽

Control Group

Background: Binjai (Mangifera caesia) is a herb derived from South Kalimantan possessing antioxidant properties which promote wound healing inhibiting oxidation radicals. The natural antioxidants present in binjai leaves can be extracted by fractionation. Purpose: This study aimed to analyze the antioxidant activity of ethyl acetate fraction in 96% ethanol extract of binjai leaf. Methods: The study constituted a pure experimental study incorporating a post-test design with only random sampling technique consisting of two groups, namely; an ethyl acetate fraction as the treatment group and ascorbic acid as the positive control group. The leaves were treated in accordance with the soxhlet method and subsequently fractionated to extract ethyl acetate fraction. This was used to measure antioxidant activity with DPPH radical damping method using a UV-Vis spectrophotometer. A linear regression calculation was performed with a standard curve to quantify the IC50 value, before the ethyl acetate fraction underwent a qualitative test of secondary metabolite. Results: An independent t-test indicated significant differences between groups, an average value of IC50 in ascorbic acid of 13.812 ppm with 0.996 linearity and a fraction of ethyl acetate 38.526 ppm with a linearity of 0.999. In contrast, at this linearity value ascorbic acid and ethyl fraction acetate demonstrate a very high linear connection between concentration and inhibition. A secondary metabolite test conducted on the ethyl acetate fraction produced positive results for flavonoid, tannins, and phenol. Conclusion: Based on the IC50 parameters, the fraction of ethyl acetate in 96% ethanol extract of binjai leaf produces very strong antioxidant activity in the content of the compounds in the fraction, namely: flavonoid, tannins and phenol.

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The Effect of Ethanol and Ethyl Acetate Fraction of Chayote fruit (Sechium edule Jacq. Swartz) on the Oxidative Stress and Insulin Resistance of Male White Rat Model Type 2 Diabetes Mellitus

Open Access Macedonian Journal of Medical Sciences ◽

10.3889/oamjms.2020.4517 ◽

2020 ◽

Vol 8 (A) ◽

pp. 962-969

Author(s):

Jekson Martiar Siahaan ◽

Syaffruddin Illyas ◽

Dharma Lindarto ◽

Marline Nainggolan

Keyword(s):

Oxidative Stress ◽

Diabetes Mellitus ◽

Insulin Resistance ◽

Ethyl Acetate ◽

Ethanolic Extract ◽

Ethanol Extract ◽

Insulin Level ◽

Ethyl Acetate Fraction ◽

Sechium Edule

BACKGROUND: Oxidative stress in type 2 diabetes mellitus (T2D) causes insulin resistance and disordered insulin secretion. Pathomechanisms of T2D consist of dysfunctional pancreatic β-cell and insulin resistance caused by free radical (reactive oxygen species and reactive nitrogen species) that produced from the glucose metabolism pathway. Insulin resistance can be measured using the homeostatic model assessment of insulin resistance (HOMA-IR). Oxidative stress can measure through the activities of malondialdehyde (MDA) and superoxide dismutase (SOD). AIM: This research aims to study the potential of chayote (Sechium edule Jacq. Swartz) to be used as antihyperglycemic in T2D. MATERIALS AND METHODS: This research was conducted with a post-test randomized controlled group design. Eleven groups with four male rats each were used. Normal untreated rats were treated under ad libitum feeding and drinking condition. Meanwhile, the rat models were induced with the combination of 45 mg/kg b.w. streptozotocin, 110 mg/kg b.w. nicotinamide, 40.5 mg/kg b.w. metformin, high-fat diet, and/or chayote extract. The chayote extract was orally administered to the rat in the form of ethanol extract and/or ethyl acetate fraction, with three dosages of 45 mg/kg b.w., 100 mg/kg b.w., and 150 mg/kg b.w. for each extract type. The body weight, glucose level, insulin level, MDA, and SOD activities were measured. The HOMA-IR was used. RESULTS: The lowest body weight of the rat model in week 0 was 145 ± 25.31, founded in Group H that was treated with ethyl acetate fraction of chayote extract (45 mg/kg b.w.). The lowest blood sugar level in the group with 2 h glucose load was 112.5 ± 27.00 on average, found in Group G that was treated with chayote ethanolic extract (150 mg/kg b.w.). The highest SOD in the group treated with chayote extract was 1.27 ± 0.20, founded in Group H treated with ethyl acetate 45 mg/kg b.w. The lowest level of MDA was 0.86 ± 0.70 in Group H treated with ethyl acetate 45 mg/kg b.w. The lowest fasting blood sugar spectrophotometer level was 150.54 ± 17.24 mg/dl in Group K with metformin treatment, followed by 155.16 ± 31.92 mg/dl in Group K treated 45 mg/kg b.w. ethanol treatment. The highest insulin level was 6.14 ± 0.71, founded in Group F that was treated with chayote ethanolic extract 100 mg/kg b.w. The lowest measurement of HOMA-IR was 0.16 ± 0.80 in Group E treated with ethanol extract of chayote 45 mg/kg b.w. CONCLUSION: Ethanol extract and fractionation of chayote work as an antioxidant and anti-insulin resistance.

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Evaluation antioxidant activity and corrosion inhibition of C38 in Hydrochloric acid medium by dried lemon peels of Kenitra Marrakech cities in Morocco and Taiz town in Yemen: A Comparative study

SHS Web of Conferences ◽

10.1051/shsconf/202111904001 ◽

2021 ◽

Vol 119 ◽

pp. 04001

Author(s):

Khaled Abdu ◽

Rahma Erahioui ◽

Khadija Khedid ◽

Hefdhal deen ◽

Maha Elhawary ◽

...

Keyword(s):

Antioxidant Activity ◽

Comparative Study ◽

Corrosion Inhibition ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Ethanolic Extract ◽

Ethanol Extract ◽

Fatty Tissue ◽

Scavenging Activity ◽

Ic50 Values

This paper presents a comparative study about the evaluation of antioxidant activity and corrosion inhibition in Kenitra, Marrakesh and Taiz. An interesting topic, indeed polyphenols can improve or help to reduce oxidative stress in the treatment of digestive problems, weight management difficulties, diabetes, hypertension, arteriosclerosis and damage fatty tissue. Therefore, the authors deal with the measurement of polyphenol content and evaluation of the antioxidant activity of lemon peels in Kenitra , Marrakesh and Taiz.The authors performs empirical analyzes on lemon peels. The total polyphenol contents of the ethanolic extract of lemon peels were measured. It was to be 30. 23, 26. 346 and 20.961 mg/CE/g in Kenitra, Marrakech, and Taiz, respectively. Moreover, the DPPH radical scavenging activity of ethanolic extract of dried lemon peels was higher than 200μg/ml concentration. They were 73.47%, 47.36%, and 32.09in Kenitra, Marrakech, and Taiz, respectively. Also, the IC50 values of ethanolic extracts calculated from the percentage inhibitions at the same concentration. Inhibition (IC50) which obtained in Kenitra was 123.089 μg/ml. It was lower compared to the ethanol extract of Marrakech and Taiz that were 197.418, 276.750μg/mL, respectively. Therefore, the extract which is containing a high amount of phenolic is showed high radical scavenging activity. In addition, the maximum inhibition efficiencies for 2 mL L-1 of the inhibitor at 298 k were 98, 12% and 84, 85 % in Kenitra and Taiz, respectively. These values obtained through polarization curve measurements.

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Antioxidant Principles of Tanacetum vulgare L. Aerial Parts

Natural Product Communications ◽

10.1177/1934578x0900401121 ◽

2009 ◽

Vol 4 (11) ◽

pp. 1934578X0900401 ◽

Cited By ~ 4

Author(s):

Malindra Juan-Badaturuge ◽

Solomon Habtemariam ◽

Caroline Jackson ◽

Michael JK Thomas

Keyword(s):

Antioxidant Activity ◽

Crude Extract ◽

Radical Scavenging ◽

Major Constituent ◽

Antioxidant Compounds ◽

Rheumatic Arthritis ◽

Tanacetum Vulgare ◽

Medicinal Uses ◽

Inflammatory Conditions ◽

Aerial Parts

The methanolic extract of aerial parts of Tanacetum vulgare L. (Asteraceae) and its fractions were investigated for antioxidant activity. The crude extract displayed DPPH radical scavenging effects with an EC50 value of 37 ± 1.2 μg/mL (n=3). Activity-guided fractionations of the crude extract resulted in the isolation of three antioxidant compounds; 3,5-O-dicaffeoylquinic acid (3,5-DCQA), axillarin and luteolin. 3,5-DCQA was the major constituent with antioxidant activity (IC50 = 9.7 μM) comparable with that of the standard quercetin (IC50 = 8.8 μM). Though the isolated compounds were previously known for their antioxidant effects, this is the first report on the identification of 3,5-DCQA from Tanacetum vulgare. The displayed potent antioxidant activity of the crude extract and isolated active principles is in support of the traditional medicinal uses of the plant for disease conditions such as wound healing, rheumatic arthritis and other inflammatory conditions.

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Quick Preparative Separation of Natural Naphthopyranones with Antioxidant Activity by High-Speed Counter-Current Chromatography

Zeitschrift für Naturforschung C ◽

10.1515/znc-2002-11-1217 ◽

2002 ◽

Vol 57 (11-12) ◽

pp. 1051-1055 ◽

Cited By ~ 7

Author(s):

Gilda G. Leitão ◽

Suzana G. Leitão ◽

Wagner Vilegas

Keyword(s):

Antioxidant Activity ◽

Ethyl Acetate ◽

High Speed ◽

Ethanolic Extract ◽

Solvent System ◽

Spectrophotometric Assay ◽

Preparative Separation ◽

Dpph Radical ◽

Preparative Scale ◽

Counter Current

The natural naphthopyranones paepalantine (1), paepalantine-9O-β-ᴅ-glucopyranoside (2) and paepalantine-9-O-β-ᴅ-allopyranosyl-(1→6)-O-β-ᴅ-glucopyranoside (3) were separated in a preparative scale from the ethanolic extract of the capitula of Paepalanthus bromelioides by high-speed counter-current chromatography (HSCCC). The solvent system used was composed of water-ethanol-ethyl acetate-hexane (10:4 : 10:4, v/v/v/v). This technique led to the separation of the three different naphthopyranone glycosides in pure form in approximately 7 hours. Paepalantine showed a good antioxidant activity when assayed by the DPPH radical spectrophotometric assay.

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Comparative Antioxidant Activity on The Ficus benjamina and Annona reticulata Leaves

International Journal of Public Health Science (IJPHS) ◽

10.11591/.v4i1.4707 ◽

2015 ◽

Vol 4 (1) ◽

pp. 21

Author(s):

Nyi Mekar Saptarini ◽

Irma Erika Herawati

Keyword(s):

Antioxidant Activity ◽

Ethyl Acetate ◽

Ethanolic Extract ◽

Natural Antioxidants ◽

Ethyl Acetate Fraction ◽

Hexane Fraction ◽

Ficus Benjamina ◽

Water Fraction ◽

Free Radical Formation ◽

Annona Reticulata

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In vitro anti-oxidant and cytotoxic analysis of Pogostemon mollis Benth

Bangladesh Journal of Pharmacology ◽

10.3329/bjp.v11i1.24157 ◽

2016 ◽

Vol 11 (1) ◽

pp. 148 ◽

Cited By ~ 10

Author(s):

Elizabeth George ◽

Muniyandi Kasipandi ◽

Mudili Vekataramana ◽

Kalagatur Naveen Kumar ◽

Joseph Anthuvan Allen ◽

...

Keyword(s):

Antioxidant Activity ◽

Ethyl Acetate ◽

Ethyl Acetate Extract ◽

Fungal Spores ◽

Bacterial Cells ◽

Free Radical Damage ◽

Cytotoxic Effects ◽

Anti Oxidant ◽

Radical Damage

In the present study, the anti-oxidant and cytotoxic effects of the different solvent extracts of Pogostemon mollis were analysed. The phenolic, tannin and flavonoid contents were highest in the ethyl acetate extract and analogous to the antioxidant activity results. The extracts showed activities similar to the standard antioxidants. The extent to which the extracts protect free radical damage on DNA was evaluated and showed good genoprotective effects. Bacterial cells and fungal spores and hyphae showed visible damages due to the treatment of ethyl acetate extract. Finally in the cytotoxic analysis, IC50 value was calculated based on the absorbance value of different concentrations. It concluded that P. mollis is a prospective candidate for the various therapeutic applications especially its ethyl acetate extract.

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