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This Article Full Text Full Text (PDF) All Versions of this Article: 293/3/H1869    most recent 00294.2007v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by Lamberts, R. R. Articles by Stienen, G. J. M. Search for Related Content PubMed PubMed Citation Articles by Lamberts, R. R. Articles by Stienen, G. J. M.

Preservation of diastolic function in monocrotaline-induced right ventricular hypertrophy in rats

¹Department of Anesthesiology, Institute for Cardiovascular Research-Vrije University (ICaR-VU), Vrije University Medical Center (VUMC), Amsterdam, The Netherlands; ²Numico Research BV, Wageningen, The Netherlands; ³Laboratory for Physiology, ICaR-VU, VUMC, Amsterdam, The Netherlands; ⁴Bioenergy Inc., Ham Lake, Minnesota

Submitted 8 March 2007 ; accepted in final form 26 June 2007

During ischemic heart diseases and when heart failure progresses depletion of myocardial energy stores occurs. D-Ribose (R) has been shown to improve cardiac function and energy status after ischemia. Folic acid (FA) is an essential cofactor in the formation of adenine nucleotides. Therefore, we assessed whether chronic R-FA administration during the development of hypertrophy resulted in an improved cardiac function and energy status. In Wistar rats (n = 40) compensatory right ventricular (RV) hypertrophy was induced by monocrotaline (30 mg/kg; MCT), whereas saline served as control. Both groups received a daily oral dose of either 150 mg·kg^–1·day^–1 dextrose (placebo) or R-FA (150 and 40 mg·kg^–1·day^–1, respectively). In Langendorff-perfused hearts, RV and left ventricular (LV) pressure development and collagen content as well as total RV adenine nucleotides (TAN), creatine content, and RV and LV collagen content were determined. In the control group R-FA had no effect. In the MCT-placebo group, TAN and creatine content were reduced, RV and LV diastolic pressure-volume relations were steeper, RV systolic pressures were elevated, RV and LV collagen content was increased, and RV-LV diastolic interaction was altered compared with controls. In the MCT-R-FA group, TAN, RV and LV diastolic stiffness, RV and LV collagen content, and RV-LV diastolic interaction were normalized to the values in the control group while creatine content remained depressed and RV systolic function remained elevated. In conclusion, the depression of energy status in compensated hypertrophic myocardium observed was partly prevented by chronic R-FA administration and accompanied by a preservation of diastolic function and collagen deposition.

energy metabolism; cardiac hypertrophy; adenine nucleotides; collagen

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