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Lege Artis Medicinae

FEBRUARY 20, 2001

[The role of steroid hormones in the protection against oxidative stress]

BÉKÉSI Gábor, FEHÉR János

[The incidence of vascular diseases increases in postmenopausal women. This negative trend seems to be controllable favourably by hormone replacement therapy (HRT). Based on the free radical mediated mechanism of atherogenesis the authors try to find the reasons for these observations on the basis of their and others’ data. They consider the increase of activity and amount of neutrophil enzyme myeloperoxydase by certain steroid particulars one of the most important elements of the vasoprotective effect of HRT. This increase diminishes the production of superoxide anion by the inhibition of the NADPH-oxidase enzyme. The observation proved firstly by the authors, that the plasma levels of myeloperoxydase - and so the ability for the inhibition of superoxide anion production by neutrophils - decreases in elderly people, might explain the higher incidence of some free radical mediated illnesses in the elderly. The authors also give a short review of antioxidant effects of steroids in general.]

Lege Artis Medicinae

MARCH 20, 2001

[Antiatherosclerotic effect of ACE inhibitor drugs]

CZURIGA István

[Based on animal and human research data, it is likely that renin-angiotensin-aldosteron system has an important role in the pathogenesis and progression of atherosclerosis. It has been demonstrated in several large clinical trials that ACE inhibitors reduce the risk of ischemic events in patients with left ventricular dysfunction. Whereas some benefits of ACE inhibitors may be related to the lowering of blood pressure, other specific effects on vasculature have also been proposed. ACE inhibitors appear to possess unique cardioprotective and vasculoprotective properties even for patients without hypertension or left ventricular dysfunction. Recent data suggest that most patient with atherosclerotic cardiovascular disease should be considered for ACE inhibitor therapy, unless they are intolerant or have contraindication for the drug. The goal of this article is to review the data from clinical trials that support the anti-atherosclerotic and antiischemic effects of ACE inhibitors.]