Cardiopulmonary bypass reduces atrial Na+-K+-ATPase expression in children

Pavlovic, Mladen; Schaller, André; Ammann, Roland A; Sanz, Javier; Pfammatter, Jean-Pierre; Carrel, Thierry; Berdat, Pascal; Gallati, Sabina (2005). Cardiopulmonary bypass reduces atrial Na+-K+-ATPase expression in children. Biochemical and biophysical research communications, 335(3), pp. 700-4. Orlando, Fla.: Academic Press 10.1016/j.bbrc.2005.07.134

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Cardiopulmonary bypass (CPB) may induce serious side effects, potentially leading to myocardial failure. The Na(+)-K(+)-ATPase is a key component for myocardial function. Due to its developmental regulation, results from adult studies cannot be adopted to the situation in childhood. Right atrial myocardium from patients with left-to-right shunts at atrial level (VO, n=8) and those without (NO, n=8) was excised during heart surgery before and after CPB. Na(+)-K(+)-ATPase isoforms ATP1A1 (p=0.008) and ATP1A3 (p=0.038) decreased during CPB, which decrease was restricted to the VO group. This study highlights the importance of the underlying heart defect for susceptibility to the effects of CPB, showing a reduced Na(+)-K(+)-ATPase mRNA expression only in patients with left-to-right shunts on the atrial level. This seemed to be an early molecular event, as apart from one, none of the patients showed heart failure before or after surgery.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Gynaecology, Paediatrics and Endocrinology (DFKE) > Clinic of Paediatric Medicine

UniBE Contributor:

Schaller, André




Academic Press




Factscience Import

Date Deposited:

04 Oct 2013 15:13

Last Modified:

04 May 2014 23:23

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URI: (FactScience: 197376)

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