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Articles by F. Ghazi
Total Records ( 2 ) for F. Ghazi
  F. Ghazi , M. Firoozrai , B. Dabirmanesh and A. Shabani
  Angiotensin-Converting Enzyme (ACE) is a dipeptidyl carboxypeptidase (EC: 3.4.15.1) that catalyzes the conversion of angiotensin I to the potent vasoconstrictor angiotensin II. Angiotesin II is responsible for an increase in blood pressure and maintenance of hypertension through the stimulation of oxidative stress. The relationship between Coronary Artery Disease (CAD), Angiotensin-Converting Enzyme (ACE) activity, ascorbic acid and serum antioxidant status in patients with coronary artery disease. A group of 65 patients with angiographically defined Coronary Artery Disease (CAD) and 60 normal control subjects were examined. The activity of Angiotensin-Converting Enzyme (ACE) was determined by the reversed-phase High Performance Liquid Chromatography (HPLC) to separate and quantify Hippuryl-Histidyl-Leucin (HHL) and Hippuric Acid (HA). Ferric Reducing Ability of Plasma (FRAP Assay) as a measure of antioxidant power was used. Serum ascorbic acid concentration was determined photometrically. The results demonstrated significant differences in ACE activity, antioxidant and ascorbic acid between CAD cases and normal controls. Increased levels of ACE activity in serum have been related to coronary artery disease. Serum ascorbic acid concentration (25.6±3.8 mg dL-1) and total antioxidant capacity (475.5±18.51 μM L-1) were significantly (p<0.05) decreased in CAD patients compared with controls.
  M. Safari , M. Knobakht , N. Rahbar Roshandel , F. Ghazi and M.T. Joghataee
  The results of several studies have demonstrated that cell differentiation influenced by derivatives of retinoic acid. To determine whether retinoic acid mediate the differentiation of neural stem cells we treated dissociated hippocampal stem cells with different concentrations of all trans or 9-cis retinoic acid and analyzed the effects on cell fate by specific monoclonal antibody for photoreceptors. Addition of exogenous retinoic acid caused a dose dependent specific in the elevation of the cell number that developed as photoreceptors in culture. Also results of immunohistochemical studies using monoclonal antibody demonstrated that the primary effect of retinoic acid was to influence progenitor cells the developed as mature and immature photoreceptors. These results suggest that retinoic acid may play an important effect in the normal development of photoreceptor cells in vitro.
 
 
 
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