Anti-glycating and anti-oxidant compounds from traditionally used anti-diabetic plant Geigeria alata(DC) Oliv. & Hiern.

Autor: Fadul, Eltayeb, Nizamani, Arsalan, Rasheed, Saima, Adhikari, Achyut, Yousuf, Sammer, Parveen, Shahida, Gören, Nezhun, Alhazmi, Hassan A., Choudhary, M. Iqbal, Khalid, Asaad
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Zdroj: Natural Product Research; Sep2020, Vol. 34 Issue 17, p2456-2464, 9p
Abstrakt: A new sesquiterpene lactone geigerianoloide (1) and four known flavonoids axillarin (2), quercetin (3), 3-methoxy-5,7,3',4'-tetrahydroxy-flavone (4) and hispidulin (5) were isolated from Geigeria alata (DC) Oliv. & Hiern. (Asteraceae). Structures were deduced using 1H- and 13C- NMR spectroscopy, mass spectrometry, while the structure of compound 1 was also deduced using X-ray crystallography technique. Geigeria alata is traditionally used for diabetes, therefore compounds were tested for anti-glycation activity, in which compounds 2 and 3 showed potent activities (IC50 values of 246.97 ± 0.83 and 262.37 ± 0.22 µM, respectively) compared to IC50 value 294.50 ± 1.5 µM of rutin. Moreover, compound 4 exhibited a comparable activity to rutin (IC50 = 293.28 ± 1.34 µM). Compound 5 showed a weak activity. Compounds 2, 3, and 4 exhibited potent DPPH radical scavenging activity (IC50 = 0.1 ± 0.00, 0.13 ± 0.00 and 0.15 ± 0.01 µM, respectively). Compounds 2, 3, and 4 demonstrated significant superoxide anion scavenging activity with IC50 values of 0.14 ± 0.001, 0.17 ± 0.00, and 0.11 ± 0.006 µM, respectively. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index