Vitamin-responsive disorders: cobalamin, folate, biotin, vitamins B1 and E

Area of Science:

• Biochemistry
• Genetics
• Pediatrics

Background:

• Enzyme function relies on vitamins as essential cofactors.
• Vitamin deficiencies, particularly B12 (cobalamin) and folic acid (folate), commonly cause megaloblastic anemia and neurological symptoms in children.
• Rare inherited disorders affecting vitamin metabolism are increasingly identified.

Purpose of the Study:

• To review inherited disorders of vitamin metabolism in children.
• To emphasize the clinical manifestations and diagnostic approaches for these conditions.
• To highlight the importance of early diagnosis and treatment with vitamin supplementation.

Main Methods:

• Literature review of inherited vitamin metabolism disorders.
• Analysis of clinical presentations, genetic mutations, and treatment outcomes.
• Case study examples illustrating diagnostic challenges and therapeutic responses.

Main Results:

• Deficiencies in cobalamin, folate, biotin, thiamine, and vitamin E can lead to distinct pediatric diseases.
• These include megaloblastic anemia, multiple carboxylase deficiency, and spinocerebellar syndromes.
• Genetic defects in vitamin absorption, transport, and metabolism are identified.
• Early vitamin administration often corrects metabolic defects and reverses clinical signs.

Conclusions:

• Inherited vitamin deficiencies are treatable causes of significant pediatric morbidity.
• Early and accurate diagnosis is crucial for effective intervention and improved patient outcomes.
• Genetic analysis aids in diagnosing and managing these rare metabolic disorders.