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Articles by J.B. Michel
Total Records ( 3 ) for J.B. Michel
  N.A. Zeggwagh , J.B. Michel , T. Sulpice and M. Eddouks
  The purpose of this study was to examine the diuretic effect of the aqueous extract of Capparis spinosa (Cs) at a dose of 500 mg kg-1 h-1 in normal rats. The aqueous extract was administred intravenously and the diuresis was followed within four hours after starting the treatment. Intravenous administration of aqueous Cs extract produced a significant increase on diuresis (p<0.001) and glomerular filtration rate from the second hour of treatment to the fourth hour (p<0.001). In addition, urinary Na+, Cl- and K + were significantly increased after two hours of Cs perfusion (p<0.01). Furosemide at a dose of 0.1 mg kg-1 h-1 had similar effect when compared to Cs administration. We conclude that the water extract of Cs fruit exhibited a significant diuretic effect accompanied by in crease in Na+, K+ and Cl- urinary excretion in normal rat. This effect may be mediated via a Furosemide like effect.
  N.A. Zeggwagh , J.B. Michel and M. Eddouks
  The aim of this study was to investigate the in vitro vasorelaxanteffect of Capparis spinosa Aqueous Extract (CSAE) at a dose of 10 mg mL-1. Aortic rings isolated from normal wistar rats were used. The addition of CSAE during the plateau phase of contraction, induced by noradrenaline and KCl, produced a rapid relaxation. Incubation of aortic ring with CSAE during 30 min shifted the noradrenaline induced dose response curve (p<0.001) and the maximum response (p<0.001) was attenuated indicating that antagonist effect of the α1 adrenoreceptors was non-competitive. However, endothelium remove significantly reduced the vasorelaxant effect of CSAE (p<0.01). Furthermore, nitric oxide inhibition reduced the vasorelaxant effect of CSAE. However, cyclo-oxygenase inhibition did not affect the vasorelaxant effect of CSAE (p<0.05). Inhibition of L-type voltage dependent Ca2+ channels did not reduce the observed CSAE vasorelaxant effect (p<0.05). We conclude that CSAE at a dose of 10 mg mL-1 possess in vitro vasorelaxant effect which may by mediated via an α1 adrenoreceptors antagonism and/or modulation of nitric oxide synthesis.
  N.A. Zeggwagh , J.B. Michel and M. Eddouks
  This study aims to evaluate the effect of Chamaemelum nobile (Cn) intravenous injection on cardiovascular and renal function of normal rats. Intravenous bolus injection of Cn at the dose of 50, 100 and 200 mg kg-1, produced dose dependent reduction in arterial blood pressure (p<0.001). Significant reduction in heart frequency was observed after Cn injection at a dose of 100 and 200 mg kg-1 (p<0.001). Perfusion of Cn aqueous extract at a dose of 200 mg kg-1 h-1 caused a significant increase in urine output after three hours of perfusion (p<0.001). Significant increase in urinary sodium and potassium excretion was observed from the first (p<0.05) to the third hour (p<0.001) of Cn perfusion. Urinary chlorure excretion increased after two hours of perfusion (p<0.001). However, glomerualr filtration rate remained unchanged after Cn perfusion (p<0.05). We conclude that the Cn aqueous extract possess potent acute hypotensive effect in normal rats. In addition Cn perfusion may affect renal function to increase urine and electrolytes excretion.
 
 
 
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