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Dyskeratosis Congenita (DC) via the NOP10 Gene

Summary and Pricing

Test Method

Exome Sequencing with CNV Detection
Test Code Test Copy GenesTest CPT Code Gene CPT Codes Copy CPT Codes Base Price
7965 NOP10 81479 81479,81479 $990 Order Options and Pricing
Test Code Test Copy Genes Test CPT Code Gene CPT Codes Copy CPT Code Base Price
7965NOP1081479 81479,81479 $990 Order Options and Pricing

Pricing Comments

Our favored testing approach is exome based NextGen sequencing with CNV analysis. This will allow cost effective reflexing to PGxome or other exome based tests. However, if full gene Sanger sequencing is desired for STAT turnaround time, insurance, or other reasons, please see link below for Test Code, pricing, and turnaround time information. If the Sanger option is selected, CNV detection may be ordered through Test #600.

An additional 25% charge will be applied to STAT orders. STAT orders are prioritized throughout the testing process.

Click here for costs to reflex to whole PGxome (if original test is on PGxome Sequencing platform).

Click here for costs to reflex to whole PGnome (if original test is on PGnome Sequencing platform).

The Sanger Sequencing method for this test is NY State approved.

For Sanger Sequencing click here.

Turnaround Time

3 weeks on average for standard orders or 2 weeks on average for STAT orders.

Please note: Once the testing process begins, an Estimated Report Date (ERD) range will be displayed in the portal. This is the most accurate prediction of when your report will be complete and may differ from the average TAT published on our website. About 85% of our tests will be reported within or before the ERD range. We will notify you of significant delays or holds which will impact the ERD. Learn more about turnaround times here.

Targeted Testing

For ordering sequencing of targeted known variants, go to our Targeted Variants page.

EMAIL CONTACTS

Genetic Counselors

Geneticist

  • Stela Berisha, PhD, FACMG

Clinical Features and Genetics

Clinical Features

Dyskeratosis congenita (DC) is a disease characterized by multiple anomalies including abnormal skin pigmentation, nail dystrophy, mucosal leukoplakia, bone marrow failure, and an increase in cancer predisposition (Walne et al. 2007. PubMed ID: 17507419; Kirwan et al. 2008. PubMed ID: 18005359). Individuals affected with DC can exhibit other features including liver cirrhosis, osteoporosis, pulmonary fibrosis and learning difficulties. Approximately 80-90% individuals affected with DC experience bone marrow failure by age 30 (Kirwan et al. 2008. PubMed ID: 18005359). Age of onset and progression of DC may vary. Those who have minimal physical findings with normal bone marrow function are at the mild end of the spectrum, while those at the severe end of the spectrum have physical features along with bone marrow failure (Savage. 2016. PubMed ID: 20301779).

Genetics

Dyskeratosis congenita is caused primarily from defects in telomere maintenance (Walne et al. 2007. PubMed ID: 17507419; Trahan et al. 2010. PubMed ID: 20008900). It is a disorder that is characterized by three genetic subtypes: X-linked recessive, caused by variants in DKC1, autosomal dominant DC caused by heterozygous variants in TERC or TERT, and autosomal recessive DC which involves a wide variety of genes including NOP10 (Kirwan et al. 2008. PubMed ID: 18005359). NOP10 is known to be associated with the telomerase complex, and is associated with H/ACA small nucleolar RNPs (snoRNPs) in humans (Walne et al. 2007. PubMed ID: 17507419).

To date, ACD, CTC1, DKC1, NHP2, NOP10, PARN, RTEL1, TERC, TERT, TINF2, and WRAP53 are genes in which pathogenic variants have been reported to cause DC (Savage. 2016. PubMed ID: 20301779). Currently, only one missense variant has been reported in NOP10 to be causative for DC (Human Gene Mutation Database).

The 64 amino acid NOLA3 protein is coded by exons 1 to 2 of the NOP10 gene located on chromosome 15q14.

Clinical Sensitivity - Sequencing with CNV PGxome

Approximately 70% of individuals with dyskeratosis congenital (DC) have pathogenic variants in at least 1 of the 11 known DC genes (Savage et al. 2009. PubMed ID: 20301779. Analysis of data from The Royal London Hospital (London, UK), shows that variants in DKC1 and TERC account for approximately 36% of cases reported (30% DKC1 and 6% TERC) (Walne et al. 2007. PubMed ID: 17507419). Pathogenic variants in NOP10 are rare and probably only account for a small percentage of DC cases. No large deletions or duplications involving NOP10 have been reported to date (Human Gene Mutation Database).

Testing Strategy

This test provides full coverage of all coding exons of the NOP10 gene plus 10 bases of flanking noncoding DNA in all available transcripts along with other non-coding regions in which pathogenic variants have been identified at PreventionGenetics or reported elsewhere. We define full coverage as >20X NGS reads or Sanger sequencing. PGnome panels typically provide slightly increased coverage over the PGxome equivalent. PGnome sequencing panels have the added benefit of additional analysis and reporting of deep intronic regions (where applicable).

Dependent on the sequencing backbone selected for this testing, discounted reflex testing to any other similar backbone-based test is available (i.e., PGxome panel to whole PGxome; PGnome panel to whole PGnome).

Indications for Test

Candidates for this test are patients with symptoms consistent with autosomal recessive Dyskeratosis Congenita and the family members of patients who have known NOP10 variants. This test may also be considered for the reproductive partners of individuals who carry pathogenic variants in NOP10.

Gene

Official Gene Symbol OMIM ID
NOP10 606471
Inheritance Abbreviation
Autosomal Dominant AD
Autosomal Recessive AR
X-Linked XL
Mitochondrial MT

Disease

Name Inheritance OMIM ID
Dyskeratosis Congenita Autosomal Recessive AR 224230

Citations

  • Human Gene Mutation Database (Bio-base).
  • Kirwan et al. 2008. PubMed ID: 18005359
  • Savage. 2016. PubMed ID: 20301779
  • Trahan et al. 2010. PubMed ID: 20008900
  • Walne et al. 2007. PubMed ID: 17507419

Ordering/Specimens

Ordering Options

We offer several options when ordering sequencing tests. For more information on these options, see our Ordering Instructions page. To view available options, click on the Order Options button within the test description.

myPrevent - Online Ordering

  • The test can be added to your online orders in the Summary and Pricing section.
  • Once the test has been added log in to myPrevent to fill out an online requisition form.
  • PGnome sequencing panels can be ordered via the myPrevent portal only at this time.

Requisition Form

  • A completed requisition form must accompany all specimens.
  • Billing information along with specimen and shipping instructions are within the requisition form.
  • All testing must be ordered by a qualified healthcare provider.

For Requisition Forms, visit our Forms page

If ordering a Duo or Trio test, the proband and all comparator samples are required to initiate testing. If we do not receive all required samples for the test ordered within 21 days, we will convert the order to the most effective testing strategy with the samples available. Prior authorization and/or billing in place may be impacted by a change in test code.


Specimen Types

Specimen Requirements and Shipping Details

PGxome (Exome) Sequencing Panel

PGnome (Genome) Sequencing Panel

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ORDER OPTIONS

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View Ordering Instructions

1) Select Test Method (Platform)


1) Select Test Type


2) Select Additional Test Options

STAT and Prenatal Test Options are not available with Patient Plus.

No Additional Test Options are available for this test.

Note: acceptable specimen types are whole blood and DNA from whole blood only.
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