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Effect of menstrual cycle hormones on cation transport in the red-cell membrane
Authors:M G Melis  C Troffa  P Manunta  P Pinna Parpaglia  A Soro  F Pala  P Madeddu  A Pazzola  G Tonolo  G Patteri
Affiliation:Centro Ipertensione, Clinica Medica, Università di Sassari.
Abstract:Erythrocyte cation transport, plasma prorenin and renin and sexual hormones were sequentially evaluated in 12 normal volunteers over the menstrual cycle. Na-K cotransport and Na-Li countertransport raised in 6 out of 12 subjects in synchronization with the ovulatory phase. When the maximal % variation (ovulatory phase) versus baseline (follicular phase) of the Na-K cotransport was plotted versus the maximal % increment of oestrogens. A direct, highly significant inverse correlation was observed (r = 0.904, p less than 0.001). Moreover, a highly significant inverse correlation between plasma prorenin and intraerythrocyte Na (r = -0.857, p less than 0.001) in the follicular phase was found. Our data suggest that erythrocyte cation transport can be influenced by sexual hormones in human.
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