Apo E Genotyping for Cardiovascular Disease Risk
Apolipoprotein E Genotyping, cardiovascular disease, hyperlipidemia
EPIC: LAB6375, Beaker: GAPOG
This test is available to outpatients only and should only be ordered once in a lifetime.
For questions, please call 800-551-0488.
Specimen Collection Criteria
Collect: One 4 mL whole blood in Lavender-top EDTA tube. (Minimum: 4.0 mL)
Physician Office/Draw Specimen Preparation
Do not freeze specimens. Maintain whole blood at room temperature (20-26°C or 68-78.8°F) prior to transport.
Preparation for Courier Transport
Transport: Whole blood at room temperature (20-26°C or 68-78.8°F). (Minimum: 4.0 mL whole blood)
- Frozen specimens.
- Unlabeled tubes.
- Specimens collected in heparin (Green-top), clot tubes (Red-top), or SST tubes.
- This test will only be performed once in a lifetime for a patient.
Do not freeze specimens. Maintain specimen refrigerated (2-8°C or 36-46°F) prior to testing.
Specimen Stability for Testing:
Room Temperature (20-26°C or 68-78.8°F): 72 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): Unacceptable
Specimen Storage in Department Prior to Disposal:
Refrigerated (2-8°C or 36-46°F): 14 days
Extracted DNA may be available for up to 3 months for additional testing if clinically indicated. Contact the Molecular Pathology Laboratory for verification.
Royal Oak Molecular Pathology Laboratory
Once per week.
Results available in 7-10 business days.
Wild type; e3/e3 genotype.
Real-Time Polymerase Chain Reaction (PCR) with Allelic Discrimination.
- Genetic variation of the Apo E locus is an important determinant of plasma lipid levels and relative risk of atherosclerosis.
- The Apo E gene is present in three common allelic forms: e2, e3 ande4. The e3 allele is the most common allele in all populations studied to date. The e4 allele is associated with increased plasma cholesterol levels and increased susceptibility to cardiovascular disease, particularly in the e4/e4 homozygotes. The e2 allele is associated with hyperlipidemia; most patients with type III hyperlipoproteinemia are homozygous e2/e2.
- Detection of Apo E alleles e4 and e2 is associated with increased risk of cardiovascular disease.
- This test is not available for Alzheimer's disease testing.
- Testing for Apo E Genotyping is recommended for:
- Assessment of cardiovascular disease risk in patients with hyperlipidemia/dyslipidemia.
- Assessment of cardiovascular disease risk in patients with positive family history of atherosclerotic (coronary artery, cerebrovascular, or peripheral vascular) disease.
- Patients who are first-degree relatives of family members with known Apo E variant alleles e2 and e4.
Molecular Pathology Lab – RO
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