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Biochemical Analysis of Α- Adrenergic Receptor Inhibitors: Doxazosin and Terazosin

Oluşturulma Tarihi: 31-10-2017

Niteleme Bilgileri

Tür: Tez

Alt Tür: Yüksek Lisans Tezi

Yayınlanma Durumu: Yayınlanmamış

Dosya Biçimi: PDF

Dil: İngilizce

Konu(lar): Kimya, BİLİM, Kimya mühendisliği,

Yazar(lar): Salem, Amani M. M. (Yazar),

Emeği Geçen(ler): İşgör, Sultan Belgin (Danışman),

Anahtar Kelimeler

Alpha-Blocker Drugs, Antioxidant Enzymes, Glutathione-S-Transferase, Superoxide Dismutase, Catalase, Glutathione Peroxidase


Özet

The objective of the study is to predict the medical purposes of alpha-blocker drugs by evaluating their effects on antioxidant defense enzymes beside to their antihypertensive actions. In order to do that, firstly Doxazosin mesylate and Terazosin hydrochloride solubility and stability were performed using UV spectrum of drugs measured at maximum wavelength of 245nm. Secondly, the effects of these drugs on the activity of antioxidant enzymes were studied for the first time with isolated or commercially available enzyme targets. In this study, the antioxidant effects of alpha-blocker drugs were analyzed by measuring the changes on the activity of these enzymes; Glutathione-S-Transferase (GST), Superoxide Dismutase (SOD), Catalase (CAT) and Glutathione Peroxidase (GPX) upon exposure to various concentrations of drugs. The results have shown that the stability of Doxazosin mesylate in phosphate buffer (pH 5.2) and Terazosin HCl in water, were not exceeding two days although it is stored at -20 C. The enzyme assays showed that the inhibitory effects of Terazosin around 90% for Catalase (CAT) with IC50 0.0002403g/L and 96% for Glutathione Peroxidase with IC50 0.00442g/L. However Terazosin have opposite behavior on Superoxide Dismutaseiv(SOD) with 70% inhibitory effect and IC50 of 0.008941g/L. The enzyme assay results showed that Doxazosin has inhibitory effect on Glutathione Peroxidase (GPx) around 85% with IC50 0.01109g/L and around 98% on Superoxide Dismutase (SOD) with IC50 0.0002177g/L., however Doxazosin have no significant effect on Catalase (CAT) enzyme. The inhibitory effects of both drugs on Glutathione-S-Transferase (GST) enzyme activity were less than 20%.


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