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Hyperinsulinaemic hypoglycaemia:genetic mechanisms, diagnosis and management

Zainaba Mohamed1, Ved Bhushan Arya, Khalid Hussain

  • 1University College London, Institue of Child Health, Developmental Endocrinology Research Clinical, Molecular Genetics Unit, London, United Kingdom.

Journal of Clinical Research in Pediatric Endocrinology
|October 4, 2012
PubMed

Insights

Hyperinsulinaemic hypoglycaemia (HH) involves unregulated insulin secretion, potentially causing severe infant brain injury. Early diagnosis and management of congenital hyperinsulinism (CHI) are crucial for preventing neurological damage.

Area of Science:

  • Endocrinology
  • Genetics
  • Pediatrics

Background:

  • Hyperinsulinaemic hypoglycaemia (HH) is a condition of unregulated insulin secretion from pancreatic beta-cells.
  • Untreated hypoglycaemia in infants can cause seizures, developmental delay, and permanent brain injury.
  • Congenital hyperinsulinism (CHI) is a severe form of HH with genetic origins.

Purpose of the Study:

  • To review the molecular basis of CHI.
  • To outline clinical presentation, diagnostic criteria, and management of HH patients.
  • To highlight recent advancements in diagnosing and treating CHI.

Main Methods:

  • Genetic analysis of mutations in eight identified genes (e.g., ABCC8, KCNJ11).
  • Histological characterization into focal and diffuse forms of CHI.
  • Advanced imaging techniques, including 18F-DOPA-PET scans.
  • Laparoscopic surgical interventions.

Main Results:

  • Mutations in ABCC8 and KCNJ11 cause the most severe CHI forms.
  • Improved diagnostic and surgical techniques enhance patient management.
  • HH in adults can stem from insulinomas, pancreatogenous hypoglycaemic syndrome, or post-bariatric surgery complications.

Conclusions:

  • Understanding the genetic etiology and advancements in diagnostics and surgery have significantly improved CHI management.
  • Early identification and meticulous management are vital to prevent neurological sequelae in infants with HH.
  • This review provides a comprehensive overview of CHI's molecular basis, clinical aspects, and therapeutic strategies.

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