Ornithine transcarbamylase (OTC) deficiency is the most common inherited metabolic disorder in urea cycles with an incidence of 1:14,000 live births. Pregnancy, childbirth and the postpartum period are considered challenging for women with this hereditary metabolic disorder, with a risk of hyperammonemia, especially in the first week after delivery. In our article, we discuss severe hepatic failure, a pregnancy complication in an OTC deficient patient that has not previously been published. Firstly, our aim is to highlight the need for a strict adherence to the recommendation of the gradual increase of protein intake during pregnancy and the importance of multidisciplinary monitoring of pregnant patients with OTC deficiency. Secondly, we refer to critical postpartum hyperammonemia in patients with this hereditary metabolic disorder.
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http://dx.doi.org/10.3390/diagnostics12020415 | DOI Listing |
Orphanet J Rare Dis
January 2025
Nanjing Women and Children's Healthcare Hospital, Center of Genetic Medicine, The Affiliated Obstetrics and Gynecology Hospital With Nanjing Medical University, No.123, Tianfei Xiang, Mochou Road, Nanjing, Jiangsu, China.
Background: Ornithine transcarbamylase deficiency exhibits a high degree of clinical heterogeneity, making its screening and classification challenging in some instances. In this study, we first established a simple and stable method for testing ornithine transcarbamylase activity using micro blood from newborns, rather than relying on venous blood.
Methods: The activity of ornithine transcarbamylase was assessed by measuring the concentration of citrulline produced in the reaction with carbamoyl phosphate and ornithine, using serum, plasma or micro blood.
Zhonghua Yi Xue Yi Chuan Xue Za Zhi
January 2025
Department of Medical Genetics and Prenatal Diagnosis, Xuzhou Maternity and Child Health Care Hospital, Xuzhou, Jiangsu 221009, China.
Objective: To explore the results of four types of Urea cycle disorders (UCDs) in newborns from the Xuzhou region, assess the efficacy of newborn screening by tandem mass spectrometry (MS/MS), and analyze their genetic characteristics.
Methods: A retrospective analysis was performed using tandem mass spectrometry to screen for inherited metabolic disorders in 691 712 newborns at the Maternal and Child Health Care Hospital of Xuzhou from November 2015 to December 2023. Ten children (cases 1-10) were diagnosed with Ornithine transcarbamylase deficiency (OTCD), Carbamoylphosphate synthase 1 deficiency (CPS1D), Arginase deficiency (ARGD), and Argininosuccinate synthase deficiency (ASSD) based on MS/MS and genetic testing.
BMJ Case Rep
January 2025
Internal Medicine, Carolinas Medical Center, Charlotte, North Carolina, USA.
Capecitabine is a widely used drug for cancer treatment. Capecitabine is a derivative of 5-fluorouracil (5-FU). A known complication of 5-FU is hyperammonaemia which can cause encephalopathy.
View Article and Find Full Text PDFGynecol Endocrinol
December 2024
Department of Gynecological Endocrinology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing Maternal and Child Health Care Hospital, Beijing, China.
Objective: To present a young girl with pyruvate kinase deficiency (PKD) and concurrent severe hemolytic anemia who underwent fertility preservation and cryopreservation. Clinical symptoms, diagnosis, treatment, and new strategies for fertility protection and preservation in PKD patients who require allogeneic hematopoietic stem cell therapy are explored.
Case Presentation: Six-year-old girl with persistent unconjugated hyperbilirubinemia and severe hemolytic anemia since birth, continuous elevation of bilirubin levels and severe splenomegaly.
MCN Am J Matern Child Nurs
December 2024
Sharon Anderson is an Associate Professor, Division of Advanced Nursing Practice, Rutgers School of Nursing, Newark, NJ; and Advanced Practice Nurse, Medical Genetics, Rutgers Health, Rutgers Robert Wood Johnson Medical School, Child Health Institute of New Jersey, New Brunswick, NJ. Dr. Anderson can be reached at and
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