A possible role of plasma aldosterone in hypotension secondary to iron-deficiency anaemia combined with zinc deficiency in rats

作者：Konomi Aki; Yokoi Katsuhiko^*

来源：British Journal of Nutrition, 2011, 105(4): 535-538.

DOI：10.1017/S000711451000406X

• Aldosterone
• Blood pressure
• Iron-deficiency anaemia
• Zinc deficiency

Patients with Fe-deficiency anaemia are often afflicted by hypotension. However, the mechanism of secondary hypotension in Fe-deficiency anaemia is unknown. To investigate the pathogenesis of secondary hypotension in Fe-deficiency anaemia, we examined the effects of Fe deprivation on plasma aldosterone concentration and blood pressure in rats. A total of forty 4-week-old male Sprague-Dawley rats were assigned into four treatment groups of ten each for the 4-week study: Fe-deficient group (FD), Zn-deficient group (ZD), Fe/Zn-deficient group (FZD) and control group (CON). At days 26 and 27, blood pressure was measured by the tail-cuff method. Plasma aldosterone concentration was determined by ELISA. The data were analysed by Tukey's multiple comparison test. Rats in the FZD had significantly lower mean blood pressure (P<0.01) and diastolic blood pressures (P<0.05) and plasma aldosterone concentration (P<0.01) compared to the CON. These results suggest that blood pressure is decreased in Fe-deficiency anaemia combined with Zn deficiency partly due to decreased circulating aldosterone concentrations in addition to decreased haematocrit.

• 出版日期2011-2