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DDC Clinic
Molecular Diagnostics Laboratory

Telephone: 440-632-5532
e-mail: lab@ddcclinic.org

CLIA: 36D1001860
Tax ID: 34-1914344
www.ddccliniclab.org

Crigler-Najjar Syndrome (UGT1A1) Targeted Testing

Crigler-Najjar Syndrome (UGT1A1) Targeted Testing

Short Name:
UGT1A1 Targeted
Targeted Testing Price:
$225
Targeted Testing CPT:
81403
Gene Name(s):
Disorder Name(s):
OMIM:
191740
General Information:

Crigler-Najjar syndromes are autosomal recessive inherited inborn disorders characterized by non-hemolytic unconjugated hyperbilirubinemia. Genetic variants of UDP-glucuronosyltransferase 1A1 gene (UGT1A1) resulting in the absence or decrease of enzyme activity have been reported in Crigler-Najjar. The c.222C>A (p.Tyr74*) variant in exon 1 of the UGT1A1 is the most frequent pathogenic variant found in the Old Order Amish and Mennonite populations. This targeted test will specifically analyze the c.222C>A variant.

Turn-around:
  • Specimen Requirements

    Label specimens with the patient’s full name, date of birth, collection date and source (if appropriate). Please use the tube size appropriate for the sample volume.

    Peripheral Blood

    • Infants: Minimum of 2-3 ml of whole blood in a purple top (EDTA) tube.
    • Adults and children over 2 years of age: Minimum of 3-5 ml of whole blood in a purple top (EDTA) tube.


    Cord Blood

    • Minimum of 3-5 ml of whole blood in a purple top (EDTA) tube.


    Isolated DNA

    • Minimum of 50 µl at a concentration of 100 ng/µl. Please include concentration on the specimen label.
  • Storage and Shipping Information

    Blood samples are stable at room temperature (15ºC to 25ºC) for one day or at 2º to 8ºC for up to 5 days. Blood samples should not be frozen at any time.

    DNA sample stability is dependent on the methodology used for the isolation. In general the DNA should be stable and can be shipped ambient or cold, following the directions below.

    Specimens from outside facilities should be packaged according to standard medical safety practices. Refrigerate samples if stored overnight prior to shipping. In hot weather, include a cool pack in the shipping container. Do not allow the specimen to freeze at any time. Package the completed test requisition inside the packaging container with the specimen. Please ship by overnight priority.

    Specimens should not be shipped on Fridays, Saturdays or the day preceding a holiday.

    **Holiday schedules will be noted on our website at least one week prior to the holiday. Feel free to contact us with any questions.

Shipping Address:

DDC Clinic Molecular Diagnostics Laboratory
14567 Madison Rd
Middlefield OH 44062

Contact Information:

Telephone: 440-632-5532
Fax: 440-632-1697
Email: lab@ddcclinic.org

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