Journals / Turkish Journal of Pharmaceutical Sciences / 2013 / Cilt: 10 - Sayı: 3

DETERMINATION OF ISOFLAVONE CONTENT BY HPLC-UV METHOD AND IN VITRO ANTIOXIDANT ACTIVITY OF RED CLOVER (TRIFOLIUM PRATENSE L.)

Kırmızı yonca (Trifolium pratense L.)'nın İzoflavon İçeriğinin YPSK-UV Metodu ile Tayini ve In vitro Antioksidan Aktivitesi

Pages
463–472
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The phenolic contents of the samples were determined using Folin-Ciocalteu's reagent.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, the methanol and acid hydrolyzed methanol extracts prepared from the aerial parts of two varieties of Trifolium pratense (red clover) collected from different parts of Turkey, namely T. pratense L. var. pratense and T. pratense L. var. sativum Schreb., have been analyzed to determine the concentrations of four isoflavones, daidzein (D), genistein (G), formononetin (F) and biochanin A (B).
📊
Key Findings & Data:Chromatographic separation was carried out by using a gradient system consisting of 0.3 % acetic acid and methanol on a reversed phase column, SupelcosilTM LC-18 (15 cm x 4.6 mm id, 5µm).
💡
Conclusion & Impact:The phenolic contents of the samples were determined using Folin-Ciocalteu's reagent.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, the methanol and acid hydrolyzed methanol extracts prepared from the aerial parts of two varieties of Trifolium pratense (red clover) collected from different parts of Turkey, namely T. pratense L. var. pratense and T. pratense L. var. sativum Schreb., have been analyzed to determine the concentrations of four isoflavones, daidzein (D), genistein (G), formononetin (F) and biochanin A (B). ARP-HPLC-UV method for the determination of these isoflavones in red clover was developed. Chromatographic separation was carried out by using a gradient system consisting of 0.3 % acetic acid and methanol on a reversed phase column, SupelcosilTM LC-18 (15 cm x 4.6 mm id, 5µm). The highest content of total D, G, F, and B were found as 0.0447, 0.0115, 0.0251 and 0.0039 % in T. pratense var. pratense, respectively. Antioxidant capacity of the methanol extracts of aerial parts of plant samples was also studied. Studied extracts were found to possess some antioxidant activities, as determined by the DPPH free radical scavenging test, thiobarbituric acid and trolox-equivalent antioxidant capacity assays. The phenolic contents of the samples were determined using Folin-Ciocalteu's reagent.

Özet

Bu çalışmada, Türkiye'nin farklı yerlerinden toplanan Trifolium pratense'nin (kırmızı yonca) iki varyetesinin, T. pratense L. var. pratense and T. pratense L. var. sativum Schreb., toprak üstü kısımlarından hazırlanan metanol ve asitle hidrolize edilmiş metanol ekstrelerinde dört izoflavonun, daidzein (D), genistein (G), formononetin (F) ve biokanin A (B), konsantrasyonları tayin edilmiştir. Kırmızı yonca içerisindeki bu izoflavonların tayini için bir ters faz YPSK-UV metodu geliştirildi. Kromatografik ayırım % 0.3 asetik asit ve metanol içeren bir gradient sistemin kullanıldığı ters faz bir kolonda, SupelcosilTM LC-18 (15 cm x 4.6 mm id, 5µm) gerçekleştirilmiştir. En yuksek total D, G, F ve B miktarları T. pratense var. pratense içerisinde sırasıyla % 0.0447, % 0.0115, % 0.0251 ve % 0.0039 olarak bulunmuştur. Bitki örneklerinin toprak üstü kısımlarının metanol ekstreleri antioksidan aktiviteleri bakımından da incelenmiştir. İncelenen ekstreler DPPH serbest radikal süpürücü, tiyobarbitürik asit ve troloks'a eşdeğer antioksidan kapasite tayinlerinde bazı antioksidan aktivitelere sahip bulunmuştur. Örneklerin fenolik madde içerikleri Folin-Ciocalteu reajanı kullanılarak belirlenmiştir.

🔖

Cite This Article

KÜÇÜKBOYACI, N., KADIOĞLU, O., ADIGÜZEL, N., TAMER, U., GÜVENÇ, A., BANİ, B. (2013). DETERMINATION OF ISOFLAVONE CONTENT BY HPLC-UV METHOD AND IN VITRO ANTIOXIDANT ACTIVITY OF RED CLOVER (TRIFOLIUM PRATENSE L.). Turkish Journal of Pharmaceutical Sciences, Cilt: 10 - Sayı: 3, 463–472. https://ajindex.com/articles/404025

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (15)

  1. Zohary M, Trifolium L. in: Flora of Turkey and the East Aegean Islands (Davis PH, ed.), Vol 3, pp 384-448, Edinburgh, Edinburgh University Press, 1970
  2. Gruenwald J, Brendler T, Jaenicke C, PDR for Herbal Medicines, Second edition, New Jersey, Thompson-Physicians' Desk Reference, 2000
  3. Heinrich M, Barnes J, Gibbons S, Williamson EM, Fundamentals of Pharmacognosy and Phytotherapy, Churchill Livingstone, Edinburgh, 2004
  4. Cos P, Bruyne TD, Apers S, Berghe DV, Pieters L, Vlietinck AJ, Phytoestrogens: Recent Developments, Planta Med 69, 589-599, 2003
  5. Beck V, Rohr U, Jungbauer A, Phytoestrogens derived from red clover: An alternative to estrogen replacement therapy?, J Steroid Biochem & Mol Bio 94, 499-518, 2005
  6. Birt DF, Hendrich S, Wang W, Dietary agents in cancer prevention: Flavonoids and isoflavonoids, Pharmacol Ther 90, 157-177, 2001
  7. Davis PH, Mill RR, Tan K, Trifolium L. in: Flora of Turkey and the East Aegean Islands (Davis PH, ed.), Vol 10, pp 126, Edinburgh, Edinburgh University Press, 1988
  8. Byfield AJ, Trifolium L. in: Flora of Turkey and the East Aegean Islands (Güner A, Özhatay N, Ekim T, Başer KHC, eds.), Vol 11, pp 95, Edinburgh, Edinburgh University Press, 2000
  9. Özhatay N, Kültür Ş, Check-list of additional taxa to the supplement Flora of Turkey III, Turk J Bot, 30, 281-316, 2006
  10. Özhatay N, Kültür Ş, Aslan S, Check-list of additional taxa to the supplement Flora of Turkey IV, Turk J Bot 33, 191-226, 2009
  11. Delmonte P, Perry J, Rader JI, Determination of isoflavones in dietary supplements containing soy, Red Clover and Kudzu: Extraction followed by basic or acid hydrolysis, J Chromatogr A 1107, 59-69, 2006
  12. Saviranta NMM, Anttonen MJ, Wright A, Karjalainen RO, Red clover (Trifolium pratense L.) isoflavones: Determination of concentrations by plant stage, flower colour, plant part and cultivar, J Sci Food and Agric 88, 125-132, 2008
  13. Krenn L, Unterrieder I, Ruprechter R, Quantification of isoflavones in red clover by highperformance liquid chromatography, J Chromatogr B 777, 123-128, 2002
  14. Ramos GP, Dias PM, Morais CB, Fröehlich PE, Dall-Agnol M, Zuanazzi JAS, LC determination of four isoflavone aglycones in red clover (Trifolium pratense L.), Chromatographia 67, 125-129, 2007
  15. Rijke E, Zafra-Gomez A, Ariese F, Brinkman UAT, Gooijer C, Determination of isoflavone glucoside malonates in Trifolium pratense L. (red clover) extracts: quantification and stability studies, J Chromatogr A 932, 55-64, 200