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Insulin homeostasis in the extremely low birth weight infant
1Hospital Dr. Sótero del Rio and Institute of Nutrition and Food Technology, University of Chile, Santiago. pmena@uec.inta.uchile.cl
Insights
Extremely low birth weight infants often experience hyperglycemia due to impaired glucose regulation. Insulin therapy shows promise for managing this condition, but further research is needed to confirm its effectiveness in clinical practice.
Area of Science:
- Neonatal Medicine
- Endocrinology
- Metabolic Disorders
Background:
- Extremely low birth weight (ELBW) infants face nutritional challenges, leading to increased glucose intolerance.
- Hyperglycemia in ELBW infants is linked to an impaired ability to suppress gluconeogenesis during glucose infusion.
- Potential causes include pancreatic insulin secretion issues and hepatic insulin resistance.
Purpose of the Study:
- To explore the mechanisms behind hyperglycemia in ELBW infants.
- To evaluate the potential role of insulin in managing glucose intolerance in this population.
Main Methods:
- Review of existing literature on glucose metabolism and insulin's effects in ELBW infants.
- Analysis of studies investigating continuous insulin infusion for hyperglycemia treatment.
Main Results:
- ELBW infants exhibit a higher capacity for glucose oxidation.
- Insulin may enhance glucose utilization and improve glucose tolerance.
- Continuous insulin infusion appears safe for treating hyperglycemia in ELBW infants, according to current data.
Conclusions:
- The findings support considering insulin for preventing and treating hyperglycemia in ELBW infants.
- Further rigorous clinical trials are essential to establish the efficacy of insulin treatment before routine adoption.
Abstract:
The need to improve the nutritional status of extremely low birth weight infants has resulted in a higher incidence of problems related to glucose intolerance. The inability of the newborn to inhibit gluconeogenesis in response to a glucose infusion has been postulated as an important determinant of the hyperglycemia observed in extremely low birth weight infants. The 2 proposed mechanisms to explain this finding include inappropriate secretion of insulin by the pancreas and decrease sensitivity of the liver to the gluco-regulatory effect of insulin. The capacity of extremely low birth weight infants to oxidize glucose at higher rates, and the positive effect that insulin may have in glucose utilization and tolerance, support the use of insulin in the prevention and treatment of hyperglycemia. Continuous infusion of insulin appears to be safe for the treatment of hyperglycemia, based on the available studies. However, the effectiveness of insulin treatment needs to be critically tested further before it can be implemented in routine clinical practice.