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Published on: August 12, 2016
Dynamic Methods for Childhood Hypoglycemia Phenotyping: A Narrative Review
Alessandro Rossi1,2, Martijn G S Rutten3, Theo H van Dijk4
1Section of Metabolic Diseases, Beatrix Children's Hospital, University of Groningen, University Medical Center Groningen, Groningen, Netherlands.
Insights
Investigating childhood hypoglycemia requires dynamic methods to assess glucose regulation. These techniques aid in diagnosing metabolic disorders and preventing severe neurological complications.
Area of Science:
- Pediatric Endocrinology
- Metabolic Disorders
- Diagnostic Techniques
Background:
- Hypoglycemia in children is a metabolic emergency stemming from glucose regulatory defects.
- It can cause severe neurological damage and requires prompt etiological investigation.
- Traditional biochemical studies may be limited, necessitating advanced diagnostic approaches.
Purpose of the Study:
- To review dynamic methods for diagnosing and monitoring hypoglycemia in children.
- To highlight the role of functional in vivo tests, continuous glucose monitoring, and stable isotope techniques.
- To discuss the potential of these methods in defining phenotypes of inherited metabolic diseases.
Main Methods:
- Discussion of functional in vivo tests for assessing glucose metabolism.
- Explanation of in vivo metabolic profiling using continuous glucose monitoring (CGM).
- Overview of stable isotope techniques for tracing glucose fluxes.
Main Results:
- Dynamic stable isotope techniques can define biochemical and clinical phenotypes of metabolic diseases.
- Glycogen storage disease type I (GSD I) is associated with severe hypoglycemia.
- These methods provide detailed information on actual glucose fluxes in vivo.
Conclusions:
- Dynamic methods are crucial for the etiological assessment of pediatric hypoglycemia.
- Functional tests, CGM, and stable isotope techniques offer valuable insights for diagnosis and management.
- These approaches can improve the understanding and treatment of inherited metabolic diseases causing hypoglycemia.
Abstract:
Hypoglycemia results from an imbalance between glucose entering the blood compartment and glucose demand, caused by a defect in the mechanisms regulating postprandial glucose homeostasis. Hypoglycemia represents one of the most common metabolic emergencies in childhood, potentially leading to serious neurologic sequelae, including death. Therefore, appropriate investigation of its specific etiology is paramount to provide adequate diagnosis, specific therapy and prevent its recurrence. In the absence of critical samples for biochemical studies, etiological assessment of children with hypoglycemia may include dynamic methods, such as in vivo functional tests, and continuous glucose monitoring. By providing detailed information on actual glucose fluxes in vivo, proof-of-concept studies have illustrated the potential (clinical) application of dynamic stable isotope techniques to define biochemical and clinical phenotypes of inherited metabolic diseases associated with hypoglycemia. According to the textbooks, individuals with glycogen storage disease type I (GSD I) display the most severe hypoglycemia/fasting intolerance. In this review, three dynamic methods are discussed which may be considered during both diagnostic work-up and monitoring of children with hypoglycemia: 1) functional in vivo tests; 2) in vivo metabolic profiling by continuous glucose monitoring (CGM); 3) stable isotope techniques. Future applications and benefits of dynamic methods in children with hypoglycemia are also discussed.
