CPT1A Sequencing

Disorder Carnitine Palmitoyltransferase 1A (CPT1A) Deficiency
Gene Name CPT1A
Clinical info

CPT1A deficiency is an autosomal recessive disorder of long-chain fatty acid oxidation with three variable phenotypes described. Generally, individuals experience a rapid onset of symptoms with a precipitating illness or fasting.

The hepatic encephalopathy usually presents in early childhood following fasting or an illness, but may also present as hypoglycemia in an infant. The acute illness can be life-threatening. Individuals are expected to have normal development and cognition unless neurological damage occurs during the episodes of decompensation.

Less common phenotypes include a possible adult-onset myopathyic presentation and an acute fatty liver of pregnancy in a female carrier where the fetus has CPT1A deficiency.

Indications Molecular testing is useful to confirm the diagnosis and to identify the disease causing mutation within a family to allow for carrier testing and prenatal diagnosis.
Associated Tests Plasma carnitine (total and free) and an acylcarnitine profile are available in the Biochemical Diagnostic Laboratory.
Detection Sequencing of the CPT1A gene will detect a mutataion in more than 90% of individuals with deficient enzyme activity.
Specimen Requirements 5 to 10 ml of peripheral blood collected in an EDTA (lavender top) Vacutainer tube is preferred. The minimal blood needed for reliable DNA isolation is 3 ml
Transport The specimen should be kept at room temperature and delivered via overnight shipping. FedEx is preferred. 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.
Turnaround time 2 weeks
Prenatal testing Prenatal diagnosis is available if the familial mutation is 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.
CPT Codes Unknown mutation: 81406

Known mutation: 81404

Deletion/Duplication Analysis: 81229
Cost $1600 for sequencing

$350 for known mutation

$700 for deletion/duplication analysis

Prenatal diagnosis for known mutation is $1000.  Please contact the laboratory for more information.

Contact For further information contact This email address is being protected from spambots. You need JavaScript enabled to view it. , MS, Lab Counselor at 1-800-473-9411.

Molecular Diagnostic Lab

The Molecular Diagnostic Lab offers DNA analysis for many genetic disorders via gene sequencing, targeted mutation analysis, MLPA deletion/duplication testing, trinucleotide repeat analysis and next generation sequencing panels.

Find out more