CFTR

Ordering
  • Turnaround time:
    10–21 calendar days (14 days on average)
  • Preferred specimen:
    3mL whole blood in a purple-top tube
  • Alternate specimens:
    DNA or saliva/assisted saliva
  • Sample requirements
  • Request a sample kit
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Associated disorders

The CFTR gene is associated with autosomal recessive cystic fibrosis (MedGen UID: 41393) and congenital absence of the vas deferens (CAVD) (MedGen UID: 98021). Additionally, the CFTR gene is associated with an increased risk for chronic pancreatitis (PMID: 17003641, 11729110).

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CFTR

Order this gene as a single gene test.

CFTR: Analysis includes the intronic variants: NM_000492.3:c.3718-2477C>T (also known as 3849+10kbC>T), c.1210-34TG[12]T[5] (also known as T5TG12), c.1210-34TG[11]T[5] (also known as T5TG11), and c.1679+1634A>G.


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Invitae tests that include this gene:

CFTR: Analysis includes the polymorphic TG/T tract within intron 9 as well as known promoter, 5’ UTR, 3’UTR, and intronic HGMD variants (including, but not limited to, c.3718-2477C>T, also known as 3849+10kbC>T and c.3717+12191C>T in the literature). Variants in these regions will be interpreted and only reported if classified as likely pathogenic or pathogenic. Polymorphisms and uncertain variants will be reported upon request.

The CFTR gene provides instructions for making a protein called the cystic fibrosis transmembrane conductance regulator. This protein functions as a channel across the membrane of cells that produce mucus, sweat, saliva, tears, and digestive enzymes. The channel transports negatively charged particles called chloride ions into and out of cells. The transport of chloride ions helps control the movement of water in tissues, which is necessary for the production of thin, freely flowing mucus. Mucus is a slippery substance that lubricates and protects the lining of the airways, digestive system, reproductive system, and other organs and tissues. The CFTR protein also regulates the function of other channels, such as those that transport positively charged particles called sodium ions across cell membranes. These channels are necessary for the normal function of organs such as the lungs and pancreas.

Assay and technical information

Invitae is a College of American Pathologists (CAP)-accredited and Clinical Laboratory Improvement Amendments (CLIA)-certified clinical diagnostic laboratory performing full-gene sequencing and deletion/duplication analysis using next-generation sequencing technology (NGS).

Our sequence analysis covers clinically important regions of each gene, including coding exons, +/- 10 base pairs of adjacent intronic sequence, and select noncoding variants. Our assay provides a Q30 quality-adjusted mean coverage depth of 350x (50x minimum, or supplemented with additional analysis). Variants classified as pathogenic or likely pathogenic are confirmed with orthogonal methods, except individual variants that have high quality scores and previously validated in at least ten unrelated samples.

Our analysis detects most intragenic deletions and duplications at single exon resolution. However, in rare situations, single-exon copy number events may not be analyzed due to inherent sequence properties or isolated reduction in data quality. If you are requesting the detection of a specific single-exon copy number variation, please contact Client Services before placing your order.

Gene Transcript reference Sequencing analysis Deletion/Duplication analysis
CFTR* NM_000492.3


*CFTR: Analysis includes the intronic variants: NM_000492.3:c.3718-2477C>T (also known as 3849+10kbC>T), c.1210-34TG[12]T[5] (also known as T5TG12), c.1210-34TG[11]T[5] (also known as T5TG11), and c.1679+1634A>G.