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MS
UMPS AR unreviewed

Hereditary orotic aciduria

Enzyme or protein defect

UMP synthase (OPRT + OMP decarboxylase)

Accumulates or becomes deficient

Orotic acid

Key features

Megaloblastic anaemia NOT responsive to B12 or folate, failure to thrive; NO hyperammonaemia (unlike OTC deficiency)

Management

Oral uridine

Not clinical guidance. Written from standard clinical biochemistry, not from the uploaded documents, and marked unreviewed. Teaching-level reference for study and database seeding only. It must not be used to manage a patient.

Recent literature

Europe PMC · fetched just now · sorted by publication date

  1. 1
    From Small Data to Big Decisions: How Clinical Pharmacology Shapes Rare Disease Development.

    Xu Y, Verone-Boyle A, Schmitz N, Zahir H, Willis BA. · 2026-08-01

    unreviewed
  2. 2
    Precision diagnostic and therapeutic interventions in rare genetic neurodevelopmental disorders.

    Assadourian AA, Martinez-Agosto JA. · 2025-11-22

    cited 10× open access unreviewed
  3. 3
    Toward an Extensible Regulatory Framework for N-of-1 to N-of-Few Personalized RNA Therapy Design.

    Bou-Jaoudeh M, Piaton-Breda G, Pereme F, Gilbert S. · 2025-02-27

    cited 6× open access unreviewed
  4. 4
    Landscape of targets within nucleoside metabolism for the modification of immune responses.

    Dunderdale EM, Abt ER. · 2025-05-30

    open access unreviewed
  5. 5
    An integrated multi-omics approach allowed ultra-rapid diagnosis of a deep intronic pathogenic variant in PDHX and precision treatment in a neonate critically ill with lactic acidosis.

    Starosta RT, Larson AA, Meeks NJL, Gracie S, Friederich MW, Gaughan SM, Baker PR, Knupp KG, Michel CR, Reisdo… · 2024-10-15

    cited 2× unreviewed
  6. 6
    Premarket Pivotal Trial End Points and Postmarketing Requirements for FDA Breakthrough Therapies.

    Mooghali M, Wallach JD, Ross JS, Ramachandran R. · 2024-08-01

    cited 7× open access unreviewed
  7. 7
    Novel CAD gene mutations in a boy with developmental and epileptic encephalopathy 50 with dramatic response to uridine therapy: a case report and a review of the literature.

    Duan L, Ye L, Yin R, Sun Y, Yu W, Zhang Y, Zhong H, Bao X, Tian X. · 2024-03-07

    cited 6× open access unreviewed
  8. 8
  9. 9
    Clinical and biochemical footprints of inherited metabolic diseases. XIII. Respiratory manifestations.

    Rossi A, Basilicata S, Borrelli M, Ferreira CR, Blau N, Santamaria F. · 2023-07-24

    cited 5× open access unreviewed
  10. 10
    The Strange Case of Orotic Acid: The Different Expression of Pyrimidines Biosynthesis in Healthy Males and Females.

    Chiara F, Allegra S, Mula J, Puccinelli MP, Abbadessa G, Mengozzi G, De Francia S. · 2023-09-28

    cited 3× open access unreviewed

External claims. These come from an index outside this database and are not checked against it. Treat them as leads.