Neonatal Diabetes Mellitus -- genetic aspects 2004

Area of Science:

• Endocrinology
• Genetics
• Pediatrics

Background:

• Neonatal Diabetes Mellitus (NDM) encompasses Transient (TNDM) and Permanent (PNDM) forms, affecting 1 in 400,000-500,000 live births.
• TNDM presents in early infancy, often in growth-retarded infants, with potential remission and later relapse.
• PNDM involves insulin secretory failure in the fetal or early neonatal period, with identified molecular causes.

Purpose of the Study:

• To describe the characteristics of Transient and Permanent Neonatal Diabetes Mellitus.
• To highlight the genetic underpinnings of PNDM, particularly KCNJ11 gene mutations.

Main Methods:

• Literature review and synthesis of existing data on TNDM and PNDM.
• Focus on molecular mechanisms, including genetic mutations associated with PNDM.

Main Results:

• TNDM infants may experience remission but can relapse later in life due to ongoing pancreatic dysfunction.
• Mutations in the KCNJ11 gene, crucial for insulin secretion regulation, are identified in a significant portion (one-third to one-half) of PNDM cases.

Conclusions:

• Pancreatic dysfunction may persist throughout life in TNDM, with relapses triggered by metabolic stress.
• KCNJ11 gene mutations are a primary cause of Permanent Neonatal Diabetes Mellitus, impacting insulin secretion.