Aspartylglucosaminuria: AGA Sequencing

AGA sequencing is a molecular test used to identify variants in the gene associated with Aspartylglucosaminuria.

Turnaround Time

3 weeks

CPT Code(s)

81479

Cost

$1,000

Genes

• Aspartylglucosaminuria

Aspartylglucosaminuria is a rare lysosomal storage disorder (LSD) characterized primarily by progressive intellectual disability. Patients with this disorder typically have some skeletal and connective tissue abnormalities, and mildly coarse features. Frequent infections, behavioral changes, cardiomyopathy, and changes in the facial skin have also been reported in association with this LSD.

Molecular testing is useful to confirm the diagnosis and to identify the disease causing mutations within a family to allow for carrier testing and prenatal diagnosis.

Sanger Sequencing

The preferred sample type is 3-5 ml of peripheral blood collected in an EDTA (purple top) tube. Extracted DNA, dried blood spots, and saliva are also accepted for this test. Saliva samples must be submitted in an approved saliva kit. Contact the lab to receive a saliva kit or to have one sent to your patient.

The specimen should be kept at room temperature and delivered via overnight shipping. If shipment is delayed by one or two days, the specimen should be refrigerated and shipped at room temperature. Do not freeze the specimen. Samples collected on Friday can be safely designated for Monday delivery.

Prenatal diagnosis is available if the familial mutations are known. Additional fees for cell culture and maternal cell contamination may apply. Maternal cell contamination studies are required for all prenatal molecular tests. Contact the laboratory prior to sending a prenatal specimen.