Compound heterozygous mutation of SLC25A1 gene in glutaric aciduria type 2

Background: Sudden unexplained postnatal collapse (SUPC) is a condition in which a newborn born at term or near term, and an Apgar score >8 at 5 min and deemed healthy, presents with sudden unexpected cardiorespiratory collapse within the 1st week of life. This can be due to multiple, heterogeneous causes. Clinical Description: A term male neonate developed lethargy and refusal to feed at 56 h of life. The baby was cyanosed, apneic, in peripheral circulatory failure and normothermic. Supportive management was started. Sepsis and congenital heart disease were ruled out. The presence of hypoglycemia, metabolic acidosis and hyperammonemia prompted us to think of a metabolic disorder. Metabolic profile was suggestive of glutaric acuduria (GA). Exome sequencing showed heterozygous missense variants in in exon 7 and 8 of SLC25A1 gene indicative of GA II but reported as of uncertain significance. Both parents were carriers. Management: The final diagnosis was neonatal onset GA II without congenital anomalies. He was started on riboflavin and carnitine. Mechanical ventilation and inotropes were gradually withdrawn and breastfeeding started. Genetic counseling was done. The baby was doing well at the 4-month follow-up visit. Conclusions: Identifying and managing a newborn with SUPC is critical for the outcome. An individualized and rational approach should be used to identify the cause. The management of GA II is primarily supportive with tiding over of metabolic crises and dietary modifications