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Background: Citrin deficiency (CD) is an autosomal recessive metabolic disorder affecting the urea cycle and energy production. Diagnosis involves measuring ammonia and amino acid levels (eg: citrulline), with confirmation through solute carrier family 25 member 13 (SLC25A13) gene mutation analysis. Herein, we present a case report of a variant in the SLC25A13 gene that has not been previously reported in the literature.
View Article and Find Full Text PDFEnhancing newborn screening sensitivity and specificity for missed NICCD using selected amino acids and acylcarnitines.
Orphanet J Rare Dis
January 2025
Department of Genetics and Metabolism, Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, No. 3333 Binsheng Road, Binjiang District, Hangzhou, 310053, Zhejiang, China.
Purpose: To enhance the detection rate of Neonatal Intrahepatic Cholestasis caused by Citrin Deficiency (NICCD) through newborn screening (NBS), we analyzed the metabolic profiles of missed patients and proposed a more reliable method for early diagnosis.
Methods: In this retrospective study, NICCD patients were classified into "Newborn Screening" (64 individuals) and "Missed Screening" (52 individuals) groups. Metabolic profiles were analyzed using the non-derivatized MS/MS Kit, and genetic mutations were identified via next-generation sequencing and confirmed by Sanger sequencing.
Long-term follow-up of neurocognitive function in patients with citrin deficiency and cholestasis.
Clin Exp Pediatr
November 2024
Department of Medical Genetics, National Taiwan University Hospital, Taipei, Taiwan.
Background: Citrin deficiency is a rare metabolic disorder prevalent in East and Southeast Asia that affects liver or neurological function throughout various life stages. While early diagnosis and dietary management can improve prognosis for infant onset disease, data on long-term neurocognitive outcomes is scarce.
Purpose: This study aimed to clarify whether transient metabolic disturbances during early childhood have a lasting effect on the neurocognitive function of individuals with citrin deficiency.
A Case of Hyperammonemia Not Attributable to Liver Disease and Treated With IV Ammonia Scavengers.
Cureus
November 2024
Department of Internal Medicine, Wrexham Maelor Hospital, Wrexham, GBR.
Hyperammonemia is a serious metabolic condition marked by elevated ammonia levels in the blood, leading to neurological damage and systemic complications if untreated. While often associated with liver dysfunction, inborn metabolic errors such as fatty acid oxidation defects, pyruvate metabolism disorders, urea cycle disorders (UCDs), urea splitting bacterial infections, hemato-oncological disorders, and portosystemic shunts are less commonly recognized but significant causes, particularly outside neonatal populations. These metabolic errors, due to partial enzyme deficiencies, may present later in life with atypical symptoms.
View Article and Find Full Text PDFMy path to citrin deficiency.
J Inherit Metab Dis
January 2025
Medical Research Council Mitochondrial Biology Unit, University of Cambridge, Cambridge, UK.
Citrin belongs to the SLC25 transport protein family found mostly in inner mitochondrial membranes. The family prototype, the ADP-ATP carrier, delivers ATP made inside mitochondria to the cellular cytoplasm and returns ADP to the mitochondrion for resynthesis of ATP. In pre-genomic 1981, I noticed that the protein sequence of the bovine ADP-ATP carrier consists of three related sequences, each containing two transmembrane α-helices traveling in opposite senses.
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