Thymidine/Deoxyuridine Analytes (Plasma)


Test Details
TEST CODE MET12
TEST METHODOLOGY HPLC/UV Detection
TAT (TURNAROUND TIME) 10 - 14 days
CPT CODE 82542
PRICE $210

Clinical Information
Clinical Significance Plasma Thymidine/Deoxyuridine analyte (MET12) is used for the diagnosis of Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE). Thymidine phosphorylase Enzyme Analysis (ENZ06) may also be used for assessment of Variants of Uncertain Significance (VUS) identified during genetic testing (e.g. Next Generation Sequencing or Capillary Sequencing Testing). CLINICAL MNGIE is an autosomal recessive disorder caused by mutations in the gene encoding thymidine phosphorylase (TP). The disease is characterized clinically by impaired eye movements, gastrointestinal dysmotility, cachexia, peripheral neuropathy, myopathy, and leukoencephalopathy. Molecular genetic studies of MNGIE patients\' tissues have revealed multiple deletions, depletion, and site-specific point mutations of mitochondrial DNA. TP is a cytosolic enzyme required for nucleoside homeostasis. In MNGIE, TP activity is severely reduced and consequently levels of thymidine and deoxyuridine in plasma are dramatically elevated. MNGIE patients may benefit from hematopoietic stem cell transplantation.
Relevant Diseases
  • Mitochondrial Neurogastrointestinal Encephalopathy Disease, Thymidine Phosphorylase Deficiency

Specimen Information
Acceptable Sample Types
  • Plasma
Sample Preparation: Collect 2-4 milliliters of blood in sodium heparin (green top) or EDTA (purple top) tube. Remove plasma and freeze at -20°Celsius. Store frozen at –20°Celsius and ship frozen. Preferred volume: 1.0 milliliter, minimum volume: 0.5 milliliter
Shipping Condition: Ship samples priority overnight on 3-4 lbs of dry ice. Sample must arrive in our lab Monday - Saturday. We do NOT accept Sunday or holiday deliveries.


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