Journal article
Cross-fostering and improved lactation ameliorates deficits in endocrine pancreatic morphology in growth-restricted adult male rat offspring
Journal of Developmental Origins of Health and Disease, Vol.1(4), pp.234-244
2010
PMID: 25141871
Abstract
Uteroplacental insufficiency and poor postnatal nutrition impair adult glucose tolerance and insulin secretion in male rat offspring, which can be partially ameliorated by improving postnatal nutrition. Uteroplacental insufficiency was induced in the WKY rat on day 18 of pregnancy (Restricted) compared to sham-operated Controls. Pups were then cross-fostered onto Control or Restricted mothers one day after birth resulting in: (Pup-on-Mother) Control-on-Control, Control-on-Restricted, Restricted-on-Control and Restricted-on-Restricted. Endocrine pancreatic morphology and markers of intrinsic beta-cell function and glucose homeostasis were assessed in male offspring at 6 months. Pancreatic and hepatic gene expression was quantified at postnatal day 7 and 6 months. Restricted pups were born 10-15% lighter than Controls and remained lighter at 6 months. Relative islet and beta-cell mass were 51-65% lower in Restricted-on-Restricted compared to Controls at 6 months. Non-fasting plasma C-reactive protein levels were also increased, suggestive of an inflammatory response. Overall, the average number of islets, small islets and proportion of beta-cells per islet correlated positively with birth weight. Intrinsic beta-cell function, estimated by insulin secretion relative to beta-cell mass, was unaffected by Restriction, suggesting that the in vivo functional deficit was attributable to reduced mass, not function. Importantly, these deficits were ameliorated when lactational nutrition was normalized in Restricted-on-Control offspring, who also showed increased pancreatic Igf1r, Pdx1 and Vegf mRNA expression at 7 days compared to Control-on-Control and Restricted-on-Restricted. This highlights lactation as a critical period for intervention following prenatal restraint, whereby deficits in endocrine pancreatic mass and associated impaired in vivo insulin secretion can be ameliorated.
Details
- Title
- Cross-fostering and improved lactation ameliorates deficits in endocrine pancreatic morphology in growth-restricted adult male rat offspring
- Authors
- A. L. Siebel (Author) - Baker Heart and Diabetes InstituteL. A. Gallo (Author) - University of MelbourneT. C. Guan (Author) - University of MelbourneJ. A. Owens (Author) - University of AdelaideM. E. Wlodek (Corresponding Author) - University of Melbourne
- Publication details
- Journal of Developmental Origins of Health and Disease, Vol.1(4), pp.234-244
- Publisher
- Cambridge University Press
- DOI
- 10.1017/S2040174410000383
- ISSN
- 2040-1752
- PMID
- 25141871
- Organisation Unit
- University of the Sunshine Coast, Queensland; School of Health and Behavioural Sciences - Legacy; School of Health - Biomedicine
- Language
- English
- Record Identifier
- 99679193002621
- Output Type
- Journal article
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Source: InCites