Pancreatic beta cell function in the neonatal foal.
Abstract: Plasma concentrations of insulin and glucose were measured in Pony and Thoroughbred foals at birth and at intervals thereafter for up to 7 days. The plasma concentrations of insulin in foals of both breeds at birth were 11.2 +/- 2.5 microU/ml (N = 6) and 13.5 +/- 1.5 microU/ml (N = 16) respectively. These values were similar to those obtained for foals in utero but were significantly less than those in adult animals. There was little variation in the plasma concentrations of insulin and glucose during the first 2 h of life and both concentrations tended to rise in the next 24-48 h. Although there was a significant positive correlation between the endogenous concentrations of insulin and glucose at all the ages studied, the responsiveness of the beta cells and the concentrations of glucose effective in stimulating insulin release changed with age. Injection of glucose (0.5 g/kg as a 50% solution in 0.9% NaCl) stimulated only a small increase in the insulin concentration in newborn Pony foals but evoked a rapid release of insulin in 5-7-day old animals.
Publication Date: 1982-01-01 PubMed ID: 6762439
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- Comparative Study
- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The research investigates the functioning of pancreatic beta cells in newborn foals and how it changes within the first week after birth, especially in regards to insulin and glucose levels.
Overview of Research Methodology
- The study primarily focused on tracking and measuring the plasma concentrations of insulin and glucose in newborn foals from two different breeds, Pony and Thoroughbred.
- The insulin and glucose levels were measured right at birth and then at subsequent intervals for up to seven days.
- The researchers also tried to understand the relationship between insulin and glucose concentrations and how it evolved as the foal aged.
- Apart from routine blood tests, an injection of glucose solution was also administered to evaluate the response of the beta cells of the pancreas.
Key Findings
- At birth, the plasma concentrations of insulin in both Pony and Thoroughbred foals were found to be similar to those of foals in utero, but significantly less than those observed in adult horses.
- The insulin and glucose levels showed little to no variation during the first two hours of life.
- Both, the insulin and glucose concentrations tended to rise 24-48 hours post birth.
- The study found a significant positive correlation between the endogenous concentrations of insulin and glucose at all ages studied, implying that the higher the glucose concentration, the higher the insulin level.
- The responsiveness of beta cells (cells in the pancreas producing insulin) and the concentrations of glucose stimulating insulin release transformed with the foal’s age.
- A glucose injection led to only a marginal increase in insulin concentration in the newborn Pony foals, but the same incited a more rapid release of insulin in foals that were 5-7 days old.
Implications of Findings
- The research provides significant insights into the functioning of pancreatic beta cells in newborn foals.
- The findings could aid in designing better dietary or medical interventions for younger foals to regulate insulin and glucose levels adequately.
- It may also prove beneficial for understanding diabetes in these animals and may lead to more effective treatment options.
Cite This Article
APA
Fowden AL, Ellis L, Rossdale PD.
(1982).
Pancreatic beta cell function in the neonatal foal.
J Reprod Fertil Suppl, 32, 529-535.
Publication
Researcher Affiliations
MeSH Terms
- Aging
- Animals
- Animals, Newborn
- Blood Glucose / metabolism
- Female
- Fetal Blood / analysis
- Fetus / physiology
- Horses
- Inbreeding
- Insulin / blood
- Islets of Langerhans / growth & development
- Islets of Langerhans / physiology
- Pregnancy
- Species Specificity
Citations
This article has been cited 2 times.- Kinsella HM, Hostnik LD, Snyder HA, Mazur SE, Kamr AM, Burns TA, Mossbarger JC, Toribio RE. Comparison of insulin sensitivity between healthy neonatal foals and horses using minimal model analysis.. PLoS One 2022;17(1):e0262584.
- Rings LM, Swink JM, Dunbar LK, Burns TA, Toribio RE. Enteroinsular axis response to carbohydrates and fasting in healthy newborn foals.. J Vet Intern Med 2019 Nov;33(6):2752-2764.
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