Abstract
Cardiorenal syndrome type 1 (CRS-1) is the acute kidney disfunction caused by an acute worsening of cardiac function. CRS-1 is the consequence of renal vasoconstriction secondary to renin–angiotensin system (RAS) activation. No animal models of CRS-1 are described in literature.
Purpose
To characterize a murine model of CRS-1 by using a high-resolution ultrasound echo-color Doppler system (VEVO2100).
Materials
Post-ischemic heart failure was induced by coronary artery ligation (LAD) in seven CD1 mice. Fifteen and thirty days after surgery, mice underwent cardiac and renal echo-color Doppler. Serum creatinine and plasma renin activity were measured after killing. Animals were compared to seven CD1 control mice.
Results
Heart failure with left ventricle dilatation (end diastolic area, p < 0.05 vs. controls) and significantly reduced ejection fraction (EF; p < 0.01 vs. controls) was evident 15 days after LAD. We measured a significant renal vasoconstriction in infarcted mice characterized by increased renal pulsatility index (PI; p < 0.05 vs. controls) associated to increased creatinine and renin levels (p < 0.05 vs. controls)
Conclusions
The mice model of LAD is a good model of CRS-1 evaluable by Doppler sonography and characterized by renal vasoconstriction due to the activation of the renin–angiotensin system secondary to heart failure.
RIASSUNTO
Per sindrome cardiorenale tipo-1 (SCR-1) si intende il peggioramento acuto della funzione renale dovuto alla riduzione della funzione cardiaca. La SCR-1 è conseguenza della vasocostrizione renale dovuta all’attivazione del sistema renina-angiotensina. In letteratura non sono descritti modelli animali che riproducono tale patologia.
Obiettivo di questo studio è caratterizzare mediante l’utilizzo di un sistema ecografico ad alta risoluzione (VEVO2100) un modello murino di CRS-1.
Materiali e Metodi
lo scompenso cardiaco post ischemico è stato indotto in 7 topi CD1 mediante legatura dell’arteria coronaria sinistra discendente anteriore. 15 e 30 giorni dopo la procedura chirurgica gli animali sono stati valutati mediante ecografia ed ecoDoppler cardiaco e renale. Gli animali sono stati sacrificati il trentesimo giorno e sono stati effettuati il dosaggio della creatinina sierica e dell’attività reninica plasmatica. I risultati sono stati confrontati con quelli ottenuti da 7 topi CD1 di controllo.
Risultati
la presenza di scompenso cardiaco, valutato mediante misurazione ecocardiografica dell’area telediastolica del ventricolo sinistro (EDA) e della frazione di eiezione (FE), è risultata evidente già 15 giorni dopo la LAD (rispettivamente p < 0.05 e p < 0.01 vs. controlli). E’ risultata inoltre una significativa vasocostrizione renale nei topi infartuati con aumento degli indici di pulsatilità renali (PI) nei topi infartuati (PI, p < 0.01 vs. controlli), associata ad un significativo aumento della creatinina e della attività reninica plasmatica (p < 0.05).
In conclusione
il modello murino di legatura di coronaria è un buon modello di SCR valutabile mediante ecoDoppler e caratterizzato da vasocostrizione renale e attivazione del sistema renina angiotensina.
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The authors declare that they have no conflict of interest.
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The study was conducted in accordance with all institutional and national guidelines for the care and use of laboratory animals.
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Pesce, P., Cecchetto, L., Brocco, S. et al. Characterization of a murine model of cardiorenal syndrome type 1 by high-resolution Doppler sonography. J Ultrasound 18, 229–235 (2015). https://doi.org/10.1007/s40477-014-0129-y
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DOI: https://doi.org/10.1007/s40477-014-0129-y