Genes
ACTA2, BGN, CBS, COL1A1, COL3A1, FBN1, FBN2, FOXE3, LOX, MAT2A, MFAP5, MYH11, MYLK, NOTCH1, PLOD3, PRKG1, SKI, SLC2A10, SMAD2, SMAD3, SMAD4, SMAD6, TGFB2, TGFB3, TGFBR1, TGFBR2
Test Guide
The CDL offers a testing panel sequencing 25 genes associated with familial arterial aneurysms, including genes for Marfan Syndrome, Loeys-Dietz syndrome, vascular Ehlers-Danlos Syndrome, and TAAD: ACTA2, COL3A1, FBN1, FBN2, MAT2A, MYH11, MYLK, PRKG1, SKI, SLC2A10, SMAD3, TGFBR1, TGFBR2, TGFB2, TGFB3, FOXE3, BGN, LOX, MFAP5, NOTCH1, PLOD3, SMAD2, SMAD4, SMAD6, COL1A1, and CBS. This panel is recommended for those individuals with vascular complications (arterial aneurysms, dissection, rupture) and a family history of similar complications with features overlapping with Marfan Syndrome and vascular Ehlers-Danlos Syndrome. Please consult our Test Guide on Familial Aneurysm for more information.
Methodology
Next Generation Sequencing: Next generation DNA sequencing is performed to identify nucleotide variants in the coding portion of the genome. All nucleotides in the coding exons and their flanking splice junctions are sequenced to a read coverage of greater than 20X. The sequence data are assembled and compared to the published genomic reference sequence. Sanger sequencing is performed if necessary to ensure complete nucleotide coverage of the target sequence and to confirm all reported variants. Human Genome Variation Society (HGVS) recommendations are followed for variant nomenclature and ACMGG/AMP variant interpretation guidelines are followed to assess variant pathogenicity, unless otherwise indicated. The following online databases and in silico analysis tools are routinely used for variant investigation: ClinVar, NHLBI Exome Sequencing Project, 1000 Genomes, dbSNP, Exome Aggregation Consortium (ExAC), available loci specific variant databases, PolyPhen-2, SIFT, Provean, Mutation Taster and Human Splicing Finder.
Specimen Requirements
BLOOD IS PREFERRED.
BLOOD: 2 EDTA (purple top) tubes
Adults: 5-10cc
Children: 3-5cc
Infants: 2-3cc
Whole blood may be stored up to 5-7 days in the refrigerator before shipping.
DNA:
5 µg DNA at a minimum concentration of ≥200 ng/µl
Special Instructions
Blood samples (or DNA) should be well labeled with patient’s full name and an identifying number.
Ship sample at room temperature with overnight delivery.
Clinical information outlining the indication for the requested tests and pertinent medical history and family history is a necessary component of testing. Please include a clinic note when available.
CPT Code & Cost
81410$1950