« Previous AbstractEffects of Confinement/Crowding on Ureogenesis in the Gulf Toadfish Opsanus Beta    Next AbstractInvasion in patchy landscapes is affected by dispersal mortality and mate-finding failure »

Front Physiol

Title:		Infusion of an acidified ethanolic-dextrose solution enhances urinary ammonium excretion and increases acid resilience in non-mechanically ventilated acidotic rabbits
Author(s):		Walsh PA;
Address:		"Department of Physiology, School of Medicine, RCSI Bahrain, Al Muharraq, Bahrain"
Journal Title:		Front Physiol
Year:		2022
Volume:		20221012
Issue:
Page Number:		860042 -
DOI:		10.3389/fphys.2022.860042
ISSN/ISBN:		1664-042X (Print) 1664-042X (Electronic) 1664-042X (Linking)
Abstract:		"Hitherto, the rabbit has long been known to have a very poor tolerance to non-volatile acid. In this study, we tested the hypothesis that acid resilience in the acidotic rabbit can be increased by enhancing the plasma availability of a naturally occurring volatile fatty acid, namely acetate. To ascertain the relative merits of the respiratory and renal systems in contributing to that resilience, we conducted our studies in non-ventilated and mechanically ventilated acidotic animals. Using ethanol as a feeder of acetate, and to counteract the antidiuretic effects of surgical interventions, we induced acidosis in anaesthetised rabbits, by intravenously infusing an acidified ethanolic dextrose solution. We observed very potent respiratory regulation of arterial blood pH coupled with a notable renal response by way of a 25-fold increase in urinary ammonium excretion in the non-ventilated group. In contrast, arterial blood pH plummeted much more rapidly in the mechanically-ventilated animals, but the compensated renal response was enormous, in the form of an 85 -fold increase in urinary ammonium output. Despite this significant adaptive renal response, the non -mechanically ventilated group of rabbits showed the greater acid resilience. This was attributed to an acetate stimulated flux through a series of metabolic pathways, generating supplementary buffer in the form of bicarbonate and ammonia, complemented by a robust respiratory response"
Keywords:		acetate acidosis ammonia herbivore hyperammonaemia kidney rabbit renal;
Notes:		"PubMed-not-MEDLINEWalsh, Patrick A eng Switzerland 2022/11/01 Front Physiol. 2022 Oct 12; 13:860042. doi: 10.3389/fphys.2022.860042. eCollection 2022"