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Articles by S.A. Saeed
Total Records ( 2 ) for S.A. Saeed
  S.A. Saeed , H. Rasheed , T.M. Ali , Y. Qazi , S. Kabraji , L. Paul , R. Khan , F.A. Hussain and S. Ahmad
  This study was conducted to investigate the effects of nimesulide in platelet aggregation. It shows that nimesulide (1-100 μ M) inhibited platelets aggregation induced by adrenaline, (20-200 μ M). It also inhibed thromboxane A2 (TXA2) formation by platelets at low concentration (IC50; 1 μ M). However, much lower concentrations of nimesulide (0.01-0.1 μ M) potentiated the aggregatory response of subthreshold concentrations of adrenaline (0.2-2 μ M). Such an effect was blocked by Ca2+-channel blockers, verapamil and diltiazem (IC50: 7 and 46 μ M, respectively), nitric oxide donor, SNAP (IC50: 2 μ M) and cinchonine (10 nM) but not by genistein (up to 10 μ M). These results are indicative of the concentration-dependent dual effects of nimesulide on human platelet aggregation. The synergistic effect of low doses of nimesulide and adrenaline seems to be mediated through inhibition of multiple signaling pathways.
  K.H. Janbaz , S.A. Saeed and A.H. Gilani
  The hepatoprotective activity of thymol, a terpenoid from essential oils of plant origin was investigated against paracetamol and CCl4-induced hepatic damage. The results showed that paracetamol produced 100% mortality at the dose of 1 g kg 1 in mice while pre-treatment of animals with thymol (150 mg kg-1) reduced the death rate to 30%. Oral administration of paracetamol (640 mg kg-1) produced liver damage in rats as manifested by the rise in serum enzyme levels of alkaline phosphatase (ALP) and transaminases (AST and ALT). Pre-treatment of rats with thymol (150 mg kg-1) prevented the paracetamol-induced rise in serum enzymes. The hepatotoxic dose of CCl4 (1.5 ml kg-1; orally) also raised the serum ALP, AST and ALT levels. The same dose of thymol (150 mg kg-1) was able to prevent the CCl4-induced rise in serum enzymes. The results indicated that thymol also prevented the CCl4-induced prolongation in pentobarbital sleeping time confirming hepatoprotectivity. It was concluded that thymol possesses anti-hepatotoxic activity.
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