Pargyline is an irreversible inhibitor of monoamine oxidase (MAO) that is used clinically to treat moderate hypertension.1,2 At 10 mg/kg iv, pargyline induces a moderate decrease of systolic blood pressure in unanaesthetized hypertensive rats but not normotensive WKR or Sprague-Daley rats.3 The correlation between the fall of blood pressure and the inhibition of brain MAO suggests that the accumulation of amine in brain is responsible for the fall in pressure.4 Reactive oxygen species-mediated monocyte hypertrophy is prevented by pargyline at a concentration of 10 µM.1
1
Bianchi, P., Pimentel, D.R., Murphy, M.P., et al. A new hypertrophic mechanism of serotonin in cardiac myocytes: Receptor-independent ROS generation. FASEB J1-15(2005).
2
Puig, M., Wakade, A.R., and Kirpekar, S.M. Effect of the sympathetic nervous system of chronic treatment with parglyline and l-DOPA. J Pharmacol Exp Ther182(1)130-134(1972).
3
Fuentes, J.A., Ordaz, A., and Neff, N.H. Central mediation of the antihypertensive effect of pargyline in spontaneously hypertensive rats. Eur J Pharmacol5721-27(1979).
4
Yamori, Y., De Jong, W., Yamabe, H., et al. Effects of L-dopa and inhibitors of decarboxylase and monoamine oxidase on brain noradrenaline leves and blood pressure in spontaneously hypertensive rats. J Pharm Pharmacol24690-695(1972).
Bianchi, P., Pimentel, D.R., Murphy, M.P., et al. A new hypertrophic mechanism of serotonin in cardiac myocytes: Receptor-independent ROS generation. FASEB J1-15(2005).
Yamori, Y., De Jong, W., Yamabe, H., et al. Effects of L-dopa and inhibitors of decarboxylase and monoamine oxidase on brain noradrenaline leves and blood pressure in spontaneously hypertensive rats. J Pharm Pharmacol24690-695(1972).
Fuentes, J.A., Ordaz, A., and Neff, N.H. Central mediation of the antihypertensive effect of pargyline in spontaneously hypertensive rats. Eur J Pharmacol5721-27(1979).
Puig, M., Wakade, A.R., and Kirpekar, S.M. Effect of the sympathetic nervous system of chronic treatment with parglyline and l-DOPA. J Pharmacol Exp Ther182(1)130-134(1972).