Journal article
The newborn rat gastric emptying rate is volume and not developmentally dependent
Neurogastroenterology and motility, Vol.30(4), pp.e13233-n/a
04/2018
DOI: 10.1111/nmo.13233
PMID: 29024213
Abstract
Background
Gastric residuals are a common finding in enterally fed preterm neonates and traditionally thought to reflect immaturity‐related delayed gastric emptying. Adult human data suggest that the meal volume regulate the gastric emptying rate, but early in life, this has not been adequately evaluated. The goal of this study was to study the rat postnatal changes in gastric emptying rate and the strain‐induced effect on muscle contraction. We hypothesized that the stomach content volume and not developmental factors determines the newborn gastric emptying rate, via the Rho‐kinase 2 (ROCK‐2) pathway.
Methods
Gastric volume and emptying rate measurements were obtained by ultrasound at different postprandial times and the wall strain‐dependent changes in muscle contraction were evaluated ex vivo.
Key Results
The newborn rat gastric emptying rate was unrelated to postnatal age, maximal 30 min postprandial, and directly proportional to content volume. In vitro measurements showed that the agonist‐induced gastric muscle contraction was directly proportional to the stomach wall strain. These changes were mediated via upregulation of ROCK‐2 activity.
Conclusions & Inferences
The newborn rat gastric emptying rate is not developmentally regulated, but dependent on the content volume via wall strain‐induced ROCK‐2 activation. Further clinical studies addressing the content volume effect on the rate of gastric emptying are warranted, to enhance feeding tolerance in preterm neonates.
The newborn rat gastric emptying rate is not developmentally regulated, but dependent on the content volume via wall strain‐induced ROCK‐2 activation.
Details
- Title: Subtitle
- The newborn rat gastric emptying rate is volume and not developmentally dependent
- Creators
- C. H. F Ferreira - University of São PauloY Shifrin - University of TorontoJ Pan - University of TorontoJ Ivanovska - University of TorontoP. J McNamara - University of TorontoJ Belik - University of Toronto
- Resource Type
- Journal article
- Publication Details
- Neurogastroenterology and motility, Vol.30(4), pp.e13233-n/a
- DOI
- 10.1111/nmo.13233
- PMID
- 29024213
- ISSN
- 1350-1925
- eISSN
- 1365-2982
- Number of pages
- 7
- Grant note
- Canadian Institutes of Health Research (MOP 133664)
- Language
- English
- Date published
- 04/2018
- Academic Unit
- Stead Family Department of Pediatrics; Neonatology; Internal Medicine
- Record Identifier
- 9984093600702771
Metrics
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