Determination of C-peptide in children: when is it useful?
1Peninsula NIHR Clinical Research Facility, Peninsula Medical School, University of Exeter, Exeter, UK. rachel.besser@nhs.net
Insights
Measuring C-peptide, a marker of endogenous insulin secretion, aids in diagnosing diabetes subtypes and monitoring Type 1 diabetes. New methods enable routine clinical assessment of insulin production.
Area of Science:
- Endocrinology
- Metabolic Disorders
- Diabetes Research
Background:
- Diabetes mellitus is characterized by insulin deficiency, yet endogenous insulin secretion is often unmeasured.
- C-peptide, absent in synthetic insulin, serves as a reliable indicator of endogenous insulin production.
- Accurate assessment of endogenous insulin secretion is crucial for diabetes diagnosis and management.
Purpose of the Study:
- To review the physiological basis of insulin secretion.
- To highlight the diagnostic and monitoring roles of C-peptide measurement in various diabetes types.
- To discuss current and emerging methods for C-peptide determination.
Main Methods:
- Review of existing literature on insulin physiology and C-peptide.
- Analysis of C-peptide's utility in differentiating diabetes subtypes, particularly in childhood.
- Evaluation of C-peptide's role in monitoring Type 1 diabetes progression and treatment response.
- Discussion of blood and urine C-peptide assay methodologies.
Main Results:
- C-peptide measurement is essential for diagnosing diabetes subtypes, guiding appropriate treatment strategies.
- In Type 1 diabetes, C-peptide monitoring offers insights into disease course, glucose variability, and risks of hypoglycemia and ketoacidosis.
- Recent advancements have introduced practical C-peptide assays for routine clinical use.
Conclusions:
- C-peptide is a vital biomarker for assessing endogenous insulin secretion in diabetes.
- Routine C-peptide measurement provides valuable clinical information for both patients and healthcare providers.
- The availability of new methods facilitates the integration of C-peptide assessment into standard diabetes care.
Abstract:
Diabetes results from insulin deficiency but despite this endogenous insulin secretion is infrequently measured. C-peptide is not present in synthetic insulin so it's presence indicates endogenous secretion. One of the key roles for measuring C-peptide in childhood is to assist in the diagnosis of diabetes subtypes, which in turn determines appropriate management. It is also useful in Type 1 diabetes to monitor disease course, both in clinical practice and in trials following intervention with disease modifying agents. Measuring C-peptide routinely in Type 1 diabetes provides valuable information to the patient and clinician about glucose variability, risk of hypoglycemia and ketoacidosis. Newer more practical methods of C-peptide determination are now available to allow assessment of endogenous insulin secretion in routine clinical practice. We review the physiology of insulin secretion, the essential roles and methods for C-peptide determination in blood and in urine.
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