Comparative Studies on Polyphenolic Composition, Antioxidant and Diuretic Effects of Nigella sativa L. (Black Cumin) and Nigella damascena L. (Lady-in-a-Mist) Seeds

Molecules

Claudia-Crina Toma¹  Neli-Kinga Olah¹  Laurian Vlase²  Cristina Mogo↚n²  Andrei Mocan² 

[1] Faculty of Medicine, Pharmacy and Dental Medicine, Vasile Goldiș Western University of Arad, 86, Rebreanu Street, Arad 310414, Romania; E-Mails:;Faculty of Pharmacy, Iuliu Hațieganu University of Medicine and Pharmacy, 8, V. Babes Street, Cluj-Napoca 400010, Romania; E-Mail:

关键词: Nigella sativa L.;    N. damascena L.;    polyphenols;    antioxidants;    diuretic;    seeds;   

DOI  :  10.3390/molecules20069560

来源: mdpi

【 摘 要 】

This study was performed to evaluate the phenolic profile, antioxidant and diuretic effects of black cumin and lady-in-a-mist seeds. In the phenolic profile, differences between the two species are significant. Qualitative and quantitative analyses of the phenolic compounds were performed using a HPLC-UV/MS method. Hyperoside was the only identified flavonoid glycoside (1.08 ± 0.01 μg∙g⁻¹ dw plant material), in the N. damascena extract. Regarding the flavonol profile, kaempferol was identified before the hydrolysis, only in the N. sativa extract (6.06 ± 0.02 μg∙g⁻¹ dw plant material) and quercetin only in N. damascena seeds (14.35 ± 0.02 μg∙g⁻¹ dw plant material). The antioxidant potential of the two species was tested through several electron transfer assays, which indicated, excepting for the FRAP assay, N. damascena as exhibiting a higher free radical scavenging activity. The diuretic activity of the two extracts was tested using a rat-experimental model on acute diuresis. Administration of the ethanolic extract of N. sativa (100 mg∙kg⁻¹) resulted in a significant increase in urine volume, although less than found with the reference drug; in addition N. damascena extract did not present a diuretic effect. In reference to the elimination of Na⁺, K⁺ and uric acid, the black cumin extract exhibited a higher natriuretic than kaluretic effect and a similar uricosuric effect with control and N. damascena. For N. damascena, the Na⁺/K⁺ ratio was sub unitary, but not due to an increasing of the kaluretic effect, but mostly to a decrease of Na⁺ excretion.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.