Browsing by Publisher "University of Benin"

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    In vivo antimalarial activity of methanol and water extracts of Eryngium thorifolium boiss (apiaceae family) against P. berghei in infected mice
    (University of Benin, 2014) Ural I.O.; Kayalar H.; Durmuskahya C.; Cavus I.; Ozbilgin A.
    Purpose: To investigate the in vivo antimalarial effect of Eryngium thorifolium, an endemic plant in Turkey. Methods: The methanol and water extracts were prepared and phytochemical analysis conducted on the extracts. Twenty four healthy Balb/c male mice, divided into 4 groups (n = 6), were infected intravenously with Plasmodium berghei and 100 - 250 mg/kg plant extracts administered orally in a single dose per day for 5 days. The untreated group of mice received normal saline solution and chloroquine (standard drug) served as reference drug. Results: The water extract group (250 mg/kg) prolonged the survival of the mice by 6 days compared with the untreated mice while the mice that received choloroquine treatment remained alive at the end of the study of the mice. In the untreated control group, maximum parasitaemia was observed on the 10th day of infection whereas The water extract exhibited some degree of antiplasmodial activity compared to untreated control group. The mice of chloroquine treated group remained alive at the end of the study with 100 % chemosuppression (p < 0.05). In the untreated control group, maximum parasitaemia was observed on the 10th day of infection whereas in the water extract group maximum parasitaemia was attained on the 16th day of infection. The water extract of the plant showed 45.85 % chemosuppression. Phytochemical screening of the water and methanol extracts revealed the presence of flavonoids, terpenoids and tannins. Anthraquinones were positive for water extract. Conclusions: The possible active compounds responsible for the observed chemosupression may be flavonoids, terpeneoids and anthraquinones which are present in the extract. This is the first report on the in vivo antimalarial activity of E. thorifolium. © Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, 300001 Nigeria. All rights reserved.
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    Antileishmanial activity of selected Turkish medicinal plants
    (University of Benin, 2014) Ozbilgin A.; Durmuskahya C.; Kayalar H.; Ertabaklar H.; Gunduz C.; Ural I.O.; Zeyrek F.; Kurt O.; Cavus I.; Balcıoglu C.; Toz S.O.; Ozbel Y.
    Purpose: To determine the in vitro and in vivo anti-leishmanial activities of extracts obtained from Centaurea calolepis, Phlomis lycia, Eryngium thorifolium, Origanum sipyleum and Galium incanum ssp. centrale.; Methods: To estimate the cytotoxicity of plant extracts, WST-1 assay was used. Parasite inhibition in the presence of plant extracts (25-500 μg/ml) in comparision with control group and reference group (glucantime, 25 μg/ml) at 12-72 h were determined in vitro on L. tropica promastigotes. The in vivo leishmanicidal activity of the extracts was evaluated against L. tropica-infected mice with glucantime as reference drug.; Results: The chloroform extract of Galium incanum ssp. centrale showed the highest cytotoxicity with IC50 value of 0.0316 ± 0.005 μg/ml. In vitro parasite inhibition by the plant extracts ranged between 16.7 ± 0.01 % and 100 ± 0.00 % at 25 μg/ml concentration. The methanol extract of Eryngium thorifolium possessed the highest activity on promastigotes of L. tropica with 100 % inhibition at 25 μg/ml. The water and chloroform extracts of C. calolepis and water and methanol extracts of E. thorifolium at a dose of 100 mg/kg reduced parasitaemia in L. tropica infected mice.; Conclusion: Parasite viability results suggest that the methanol extract of Eryngium thorifolium, regarded as non-cytotoxic, is a promising candidate drug for treating L. tropica infection. © Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, 300001 Nigeria. All rights reserved.