Title : The Na+/H+ antiporter is not involved in potentiation of thrombin-induced responses by epinephrine.

Pub. Date : 1988 Feb 29

PMID : 2831879






7 Functional Relationships(s)
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1 Unlike thrombin, however, epinephrine is incapable of directly activating phospholipase C, but is well known to potentiate the effects of thrombin on this enzyme and other subsequent steps of platelet activation. Epinephrine coagulation factor II, thrombin Homo sapiens
2 The response to thrombin desensitized over a period of minutes, and after this had occurred, epinephrine was able to activate phospholipase C and induce the release of intracellular Ca2+. Epinephrine coagulation factor II, thrombin Homo sapiens
3 This showed that epinephrine was able to recouple thrombin receptors to phospholipase C, and this appeared to be mediated by the same mechanism which is involved in potentiation by epinephrine of thrombin-stimulation of phospholipase C. These effects of epinephrine were not altered by inhibition of the Na+/H+ antiporter with ethylisopropylamiloride or by use of the Na+/H+ ionophore, monensin. Epinephrine coagulation factor II, thrombin Homo sapiens
4 This showed that epinephrine was able to recouple thrombin receptors to phospholipase C, and this appeared to be mediated by the same mechanism which is involved in potentiation by epinephrine of thrombin-stimulation of phospholipase C. These effects of epinephrine were not altered by inhibition of the Na+/H+ antiporter with ethylisopropylamiloride or by use of the Na+/H+ ionophore, monensin. Epinephrine coagulation factor II, thrombin Homo sapiens
5 This showed that epinephrine was able to recouple thrombin receptors to phospholipase C, and this appeared to be mediated by the same mechanism which is involved in potentiation by epinephrine of thrombin-stimulation of phospholipase C. These effects of epinephrine were not altered by inhibition of the Na+/H+ antiporter with ethylisopropylamiloride or by use of the Na+/H+ ionophore, monensin. Epinephrine coagulation factor II, thrombin Homo sapiens
6 This showed that epinephrine was able to recouple thrombin receptors to phospholipase C, and this appeared to be mediated by the same mechanism which is involved in potentiation by epinephrine of thrombin-stimulation of phospholipase C. These effects of epinephrine were not altered by inhibition of the Na+/H+ antiporter with ethylisopropylamiloride or by use of the Na+/H+ ionophore, monensin. Epinephrine coagulation factor II, thrombin Homo sapiens
7 We conclude that epinephrine potentiates thrombin-induced responses by a mechanism which is unrelated to its effects on the Na+/H+ antiporter, and this is not a requirement for thrombin-induced phospholipase C activation. Epinephrine coagulation factor II, thrombin Homo sapiens