1995
DOI: 10.1016/0014-2999(95)00155-e
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Effects of nifedipine and Bay K 8644 on myotropic responses in aortic rings of pregnant rats

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Cited by 20 publications
(51 citation statements)
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“…Several studies reported involvement of ion channels in the control of vascular reactivity during pregnancy (3,9,14,22,33,34). In agreement with previous reports (3, 9), we have observed that PhE responses were greatly reduced by activators of K ATP (cromakalim, 1 mol/l) and BK Ca (NS-1619, 30 mol/l) while the latter and VDCC inhibitor (nifedipine, 0.1 mol/l) were more efficient in inhibiting KCl responses.…”
Section: Discussionsupporting
confidence: 92%
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“…Several studies reported involvement of ion channels in the control of vascular reactivity during pregnancy (3,9,14,22,33,34). In agreement with previous reports (3, 9), we have observed that PhE responses were greatly reduced by activators of K ATP (cromakalim, 1 mol/l) and BK Ca (NS-1619, 30 mol/l) while the latter and VDCC inhibitor (nifedipine, 0.1 mol/l) were more efficient in inhibiting KCl responses.…”
Section: Discussionsupporting
confidence: 92%
“…We first demonstrated that the responses to PhE and KCl were decreased in the aortic rings of pregnant rats (Fig. 1, A and B), confirming earlier observations on blunted responses to vasopressors associated with gestation (3,9,24,30,33,34,38). Interestingly, these blunted responses were already evident at P17, before the BP reduction that usually occurs at P18 (4).…”
Section: Discussionsupporting
confidence: 88%
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“…Durant la grossesse, une résistance à l'action vasoconstrictrice de l'angiotensine II se développe, encore qu'elle ne soit pas spécifique à ce peptide [10]. Cette résistance se manifeste aussi chez les animaux de laboratoire et on la retrouve même à l'échelle des vaisseaux sanguins isolés [11,12]. Il semble que la baisse de résistance vasculaire périphériques, la vasodilatation et la résistance artérielle aux stimulus vasoconstricteurs soient liées [9,13].…”
Section: Revuesunclassified
“…On a attribué ce phénomène au fait que le processus de couplage excitation-réponse était perturbé. Ainsi, dans les artères de rates gestantes, il se traduit par un ralentissement de la mobilisation du calcium extracellulaire via les canaux calciques dépen-dants du voltage, sans diminution de l'expression de la protéine du canal [11,13]. Ce phénomène apparaît aussi dans la glomerulosa surrénalienne [14] et les lymphocytes (Simaan, St-Louis, Brochu, observation non publiée).…”
Section: Revuesunclassified