| Abstrakt: |
The study of erythrocytes of 80 men showed that adrenaline (10-10 g/mL) and phenylephrine (10-10 g/mL) dose-dependently increase the rate of agglutination of erythrocytes, judging by the decrease in the start time of agglutination, whereas ginipral (10-10 g/mL), on the contrary, decreases it. The effect of adrenaline and phenylephrine is blocked by nicergoline (10 g/mL), enhanced by obzidan (10 g/mL), and is not changed by yohimbine (10 g/mL) and atenolol (10 g/mL). These data indicate that the rate of agglutination increases with the activation of α1-adrenergic receptor (AR) and decreases with the activation of β-AR, whereas the activation of α- and β-AR does not affect it. Trifluoperazine (10 g/mL) as a calmodulin antagonist, barium chloride (10 g/mL) as a Ca-dependent K-channel blocker, and indomethacin (10 g/mL) as an inhibitor of cyclooxygenase and phospholipase A inhibit the ability of adrenaline to increase the rate of agglutination of erythrocytes. This suggests that this effect of adrenaline is caused by an increased Ca entry into the erythrocyte, activation of calmodulin, cyclooxygenase, and phospholipase A, and subsequent K release from the erythrocytes through the Ca-dependent K channels, which is regarded as a manifestation of eryptosis. Indirectly, this means that the potentiation of activation of α-AR and β-AR, respectively, increases and, conversely, decreases the rate of eryptosis. [ABSTRACT FROM AUTHOR] |
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