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Phytochemical Assay and Antiplatelet Activity of Fractions of Velvet Bean Seeds (Mucuna pruriens L.)

HAYATI Journal of Biosciences Vol 17, No 2 (2010): June 2010
Publisher : Bogor Agricultural University, Indonesia

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Abstract

Platelet aggregation is an important factor contributing to the formation of thrombus due to an uncontrolled blood clotting. An antiplatelet agent is a compound which decreases platelet aggregation and inhibits thrombus formation. The objectives of this study were to determine the class of compound employing phytochemical assay and to determine the in vitro antiplatelet activity of four fraction, namely hexane, ethyl acetate, butanol, and water fractions of velvet bean seeds (Mucuna pruriens L.) using epinephrine (EPN) as agonist of platelet aggregation. The antiplatelet activities were tested in human platelet rich plasma with hyperaggregation. To determine the activities, EPN was arranged at 4 level of concentrations  (300, 150, 75, and 30 μM), and antiplatelet agents were at 500 µg/ml. The results indicated that ethyl acetate, butanol and water fraction contained high flavonoids and moderate phenols. The water, butanol and ethyl acetate fractions of velvet bean seeds exhibited potential inhibition of EPN-induced platelet aggregation at all concentrations. The strongest antiplatelet agent was water fraction and had the same antiplatelet activity as aspirin at level 150, 75, and 30 μM of EPN. Butanol fraction had the same antiplatelet activity as aspirin at the lowest EPN (30 μM).

PENGARUH PELATIHAN KERJA, DISIPLIN KERJA DAN MOTIVASI TERHADAP KINERJA PADA PT. DUA MITRA LANGGENG SURAKARTA

KELOLA Vol 5, No 2 (2018): December
Publisher : KELOLA

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Abstract

The purpose of this study is to determine the effect of job training, work discipline and motivation on employee performance PT. Dua Mitra Langgeng Surakarta. Population in this research all employees of PT. Two partners Langgeng numbered 250 people, while the sample used as many as 100 people who become respondents and sampling techniques of this study using accidental sampling technique. Based on the results analysis known to job training, work discipline and motivation have an effect on signifikan to employee performance of PT. Dua Mitra Langgeng Surakarta. The simultaneous test results of job training variables, work discipline and motivation have a significant effect on employee performance variable of PT. Dua Mitra Langgeng Surakarta.Keywords: Job Training, Work Discipline, Motivation and Performance

The Antiplatelet Aggregation Effect of Extract And Ethyl Acetate Fraction of Velvet Bean Seed (Mucuna pruriens L.) in Dyslipidemic Rat

Agritech Vol 31, No 1 (2011)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

Cardiovascular disease (CVD) is the first cause of death in the world, CVD has complex and multifactorial process including atherogenic lipoprotein, oxidized low density lipoprotein (LDL), endothelial dysfunction, plaque stability, vascular inflammation, thrombotic and fibrinolytic disorder, exercises and genetic factor. Inhibiting the platelet ag- gregation is one of the CVD prevention. Velvet bean seed (Mucuna pruriens L.) can be found abundantly in Indonesia, but has not been used as herbal medicine. Ethanol extract and ethyl acetate of velvet bean seed contain high flavonoids and antioxidants properties which is expected could inhibit platelet aggregation. The objectives of the research were to determine the activity of ethanol extract and ethyl acetate fraction of velvet bean seed towards clotting and bleeding time in dyslipidemic rats. This research used completely randomized design in dyslipidemic rats which were given by ethanol extract of velvet bean seed at the concentrations of 50, 100 and 200 mg/kg BW/day and ethyl acetate fraction of velvet bean seed at the concentrations of 15, 30 and 60 mg/kg BW/day and 42.2 mg/kg BW/day aspirin for ten days. Clotting and bleeding time were measured at days 0, 10, and 20. Data were analyzed using One way analysis of vari- ance and continued with Duncan’s post Hoc test with 95 % level of significancy. The results showed that administration of 60 mg/kg BW/day ethyl acetate fraction of velvet bean seed and at the concentrations of 100 and 200 mg/kg BW/ day ethanol extract of velvet bean seed, prolong the clotting time at day 10, ethyl acetate fraction at the concentration of 60 mg/kg BW/day, 200 mg/kg BW/day ethanol extract of velvet bean prolong bleeding time at day 10.

Free Radical Scavenging and α-Glucosidase Inhibitor Activity of Ethanolic Extract of Mucuna pruriens L.

JFIOnline | Print ISSN 1412-1107 | e-ISSN 2355-696X Vol 5, No 3 (2011)
Publisher : Indonesian Research Gateway

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Abstract

Biji kacang “koro benguk” atau velvet bean sudah sangat dikenal tetapi dasar ilmiah penggunaannya sebagai obat tradisional terutama sebagai antioksidan dan antidiabetik masih belum diketahui. Oleh sebab itu dalam penelitian ini dilakukan percobaan untuk mengevaluasi aktivitas antioksidan dan antidiabetik dari ekstrak biji koro benguk, serta fraksi heksana, etil asetat, butanol dan air menggunakan uji in vitro menggunakan DPPH (1,1-difenil-2-pikril-hidrazil) dengan pembanding positif kuersetin dan BHA. Hasil penelitian menunjukkan bahwa IC50 DPPH untuk ekstrak biji koro benguk, fraksi heksana, etil asetat, butanol dan air berturut-turut sebesar 22,17; 152,60; 113,03; 4,93; dan 9,14 μg/mL, sedangkan untuk kuersetin dan BHA masing masing sebesar  4,28 dan 22,587 μg/mL. Aktivitas antidiabetik ditentukan menggunakan metode penghambatan α-glukosidase dengan glucobay sebagai kontrol positif. Hasil penelitian menunjukkan bahwa IC50 antidiabetik untuk ekstrak biji koro benguk, fraksi heksana, etil asetat, butanol, air, dan glucobay berturut-turut sebesar 24,44; 19,55; 8,40; 80,98; 48.97; dan 16,23 μg/mL. ABSTRACT Velvet bean seeds are ubiquitous but the scientific basis for its medicinal use especially as antioxidant and antidiabetic remains unknown. Therefore, a study was designed to evaluate  antioxidant and antidiabetic activities of the  extract, hexane, ethyl acetate, butanol and water fractions of velvet bean seeds. In order to evaluate antioxidant activity of extract and fractions  using  quercetin,  butylated hydroxyanisole (BHA) as positive control and 1,1-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging activity was determined. The results showed that IC50 of DPPH were 22.17; 152.60; 113.03; 4.93; 9.14 μg/mL respectevily;  quercetin 4.28 and BHA 22.587 μg/mL.  Antidiabetic activity was determined by using  of α-glucosidase inhibition assay of  extract, four fractions and glucobay as positive control. The results showed that antidiabetic IC50 were24.44; 19.55; 8.40; 80.98; 48.97μg/mL respectively and glucobay as positive control  16.23 μg/mL.