Overview
Biotin-thiamine-responsive basal ganglia disease (BT1-RD) is an inherited metabolic disorder characterized by neurological symptoms that improve with biotin and thiamine supplementation 1.Diagnosis
Elevated plasma 3-hydroxyisovaleryl carnitine (3HIA-carnitine) concentration can serve as a biomarker for biotin deficiency 3.
Clinical presentation includes neurological symptoms such as encephalopathy, hypotonia, and movement disorders 1.
Genetic testing to identify specific mutations associated with the condition may be warranted 1.Management
First-line Treatment: High-dose biotin supplementation is essential 1.
Adjunctive Treatment: Thiamine supplementation is recommended alongside biotin to manage symptoms effectively 1.
Monitoring of biotin status through biomarkers like plasma 3HIA-carnitine may guide treatment adjustments 3.Special Populations
Pediatrics: Careful administration of biotin is crucial in infants and children due to unique metabolic needs and potential for deficiency 1.
Pregnancy: Specific guidelines for biotin supplementation during pregnancy are not detailed in the provided abstracts, but biotin deficiency can impact embryonic development 2.Key Recommendations
Initiate high-dose biotin supplementation in patients diagnosed with biotin-responsive disorders to manage neurological symptoms effectively (Evidence: Expert opinion 1).
Consider plasma 3HIA-carnitine levels as a biomarker to monitor biotin status and guide supplementation adjustments (Evidence: Moderate 3).
Provide thiamine alongside biotin supplementation to optimize clinical outcomes in BT1-RD (Evidence: Expert opinion 1).References
1 Wolf B. Revisiting the administration of biotin to children with biotin-responsive disorders. Molecular genetics and metabolism 2022. link
2 Quick M, Shi L. The sodium/multivitamin transporter: a multipotent system with therapeutic implications. Vitamins and hormones 2015. link
3 Horvath TD, Stratton SL, Bogusiewicz A, Pack L, Moran J, Mock DM. Quantitative measurement of plasma 3-hydroxyisovaleryl carnitine by LC-MS/MS as a novel biomarker of biotin status in humans. Analytical chemistry 2010. link
4 Said HM. Cell and molecular aspects of human intestinal biotin absorption. The Journal of nutrition 2009. link