Test Price
2,800 AED✅ Home Collection Available
NNT Gene Glucocorticoid Deficiency Type 4 (With or Without Mineralocorticoid Deficiency) – Genetic Test in UAE | 2,800 AED
Executive Summary & Core Metrics
Diagnostic Accuracy Guarantee:
99.9% Diagnostic Sensitivity via ISO 9001:2015 Accredited NGS Processing (Cert: INT/EGQ/2509DA/3139). Every NNT gene variant is cross-validated against ClinVar, gnomAD, and the current ACMG/AMP interpretive guidelines.
Premium Logistics:
VIP Mobile Phlebotomy & Temperature-Controlled Cold-Chain Home Collection available daily from 8 AM to 11 PM across all seven Emirates. Sample integrity maintained at 2–8°C with real-time GPS-tracked transport.
Clinical Guidance:
Complimentary telephonic post-test clinical guidance in result interpretation with a qualified genetic counsellor. Pre-test genetic counselling session is mandatory to draw a comprehensive pedigree chart of family members affected with Glucocorticoid Deficiency Type 4.
Insurance & Billing:
Direct Billing Verification via WhatsApp at +971 54 548 8731. We coordinate directly with DHA-approved TPAs and all major UAE insurers.
Test Overview & Methodology
NNT (Nicotinamide Nucleotide Transhydrogenase) gene sequencing via Genetic Test interrogates all coding exons, splice-site junctions, and deep intronic regions of the NNT gene (chromosome 5p12) to identify pathogenic single-nucleotide variants (SNVs), small insertions/deletions (indels), and copy-number variations (CNVs) at read depths exceeding 100×.
This comprehensive genetic test detects mutations causing hereditary glucocorticoid deficiency type 4 with high diagnostic precision.
Test Comparison at a Glance
| Parameter | Our NGS Test | Sanger Sequencing (Alternative) |
|---|---|---|
| Precision | 99.9% Sensitivity | ~95% for targeted regions |
| Methodology | NGS (Full Gene Coverage) | Single-exon capillary |
| CNV Detection | Included (Bioinformatic) | Not reliably detected |
| Turnaround Time | 3–4 Weeks | 2–6 Weeks (fragmented) |
Physician Insight & Safety Protocols
Lina Osama Zaki Quteineh
DHA Registration ID: 9294403 — Consultant Medical Genetics
"A positive NNT variant finding on this NGS panel is a critical molecular clue, but it must always be correlated with serum cortisol, ACTH, and plasma renin activity before reaching a clinical diagnosis. This test provides the genetic blueprint; your endocrinologist integrates it with biochemical phenotype data to guide lifelong glucocorticoid and, when indicated, mineralocorticoid replacement therapy. Never interpret a VUS (Variant of Uncertain Significance) as benign without confirmatory familial segregation studies."
Medication Safety Advisory
Do not discontinue prescribed glucocorticoid or mineralocorticoid medications without consulting your treating physician. This genetic test is diagnostic and prognostic; it does not replace emergency management of adrenal crisis.
Exclusion Criteria & Emergency Red Flags
- Exclusion Criteria: This test is not indicated for acute adrenal crisis management. Genetic testing is deferred in hemodynamically unstable patients. Neonatal screening for congenital adrenal hyperplasia (CAH) must precede NNT sequencing in infants with ambiguous genitalia or salt-wasting crisis.
- ER Red Flags: If the patient experiences severe vomiting, diarrhoea, hypotension, hypoglycaemia, altered consciousness, or shock, proceed immediately to the nearest Emergency Department. Suspect Adrenal Crisis — administer parenteral hydrocortisone per protocol.
- Sample Rejection Criteria: Haemolysed whole blood, insufficient DNA yield (<50 ng/µL), or FTA cards with visible contamination will require recollection.
- Paediatric Note: Genetic testing of minors requires documented informed consent from a legal guardian and mandatory pre-test genetic counselling as per Federal Decree-Law No. 4 of 2016 on Medical Liability.
Patient FAQ & Clinical Guidance
1. What is the NNT gene and why is this NGS test recommended for suspected Glucocorticoid Deficiency Type 4?
The NNT gene encodes nicotinamide nucleotide transhydrogenase, a mitochondrial enzyme critical for NADPH regeneration and adrenal steroidogenesis, and pathogenic biallelic variants cause autosomal recessive Familial Glucocorticoid Deficiency Type 4. This NGS-based genetic test is the gold-standard confirmatory diagnostic tool when a patient presents with unexplained hypoglycaemia, hyperpigmentation, failure to thrive, and low serum cortisol with markedly elevated ACTH levels. Unlike single-gene Sanger sequencing, our NGS approach covers all coding exons, intron-exon boundaries, and detects CNVs that may be missed by conventional methods. Early molecular diagnosis enables timely initiation of life-saving glucocorticoid replacement and genetic counselling for family planning.
2. How should I prepare for the NNT Gene Genetic Test and what sample types are accepted?
No fasting or medication adjustments are required; however, a mandatory pre-test genetic counselling session is scheduled to construct a detailed three-generation pedigree chart before sample collection. We accept three sample types: (1) 3–5 mL of whole blood collected in EDTA (lavender-top) tubes, (2) extracted genomic DNA at a minimum concentration of 50 ng/µL with A260/A280 ratio between 1.8–2.0, or (3) one drop of blood on an FTA Card (Whatman FTA or equivalent), which is ideal for paediatric patients and remote home collection. Blood samples must be refrigerated at 2–8°C and transported within 24 hours. FTA cards are stable at ambient temperature. Our VIP Mobile Phlebotomy team serves all seven Emirates from 8:00 AM to 11:00 PM with full cold-chain logistics.
3. How reliable is this NGS test and what do the results mean for my clinical management?
This ISO 9001:2015 accredited NGS assay achieves 99.9% diagnostic sensitivity with 100× minimum read depth across all coding regions of the NNT gene, delivering clinically actionable results in 3 to 4 weeks. Results are reported using current ACMG/AMP variant classification: Pathogenic, Likely Pathogenic, Variant of Uncertain Significance (VUS), Likely Benign, or Benign. A positive (Pathogenic/Likely Pathogenic) result confirms the molecular diagnosis and guides immediate endocrinology referral for glucocorticoid ± mineralocorticoid replacement. A VUS result requires familial segregation testing and periodic reanalysis. A negative result does not exclude adrenal insufficiency from other genetic causes (e.g., MC2R, MRAP, STAR, CYP11A1 mutations). All results include complimentary telephonic clinical guidance with a DHA-licensed genetic counsellor to ensure accurate interpretation and next-step planning.
UAE Regulatory & Data Privacy Adherence
Regulatory & Privacy Compliance
This genetic diagnostic service operates in full compliance with:
- Federal Decree-Law No. 45 of 2021 on Personal Data Protection (PDPL) – ensuring strict confidentiality and security of genetic data.
- Federal Law No. 2 of 2019 Concerning the Use of Information and Communication Technology in Health Fields – governing digital health records and telemedicine.
- Federal Decree-Law No. 4 of 2016 on Medical Liability – covering informed consent and clinical safety protocols.
ISO 9001:2015 certified (Cert: INT/EGQ/2509DA/3139) for quality management in genetic diagnostic services.
Clinical & Logistical Metadata
| Test Name | NNT Gene Glucocorticoid Deficiency Type 4 (With or Without Mineralocorticoid Deficiency) – Genetic Test |
| Price (AED) | 2,800 AED |
| Turnaround Time | 3–4 Weeks |
| Sample Type / Matrix | Whole Blood (EDTA), Extracted Genomic DNA, or FTA Card |
| Methodology Used | Next Generation Sequencing (NGS) – Illumina NovaSeq X Plus, 150 bp paired-end reads |
| ICD-10-CM Code | E27.1, E27.40, Z13.228 |
| LOINC Code | 81247-7 |
| DHA Facility License & Laboratory Address | Premises 105, Floor 1, Building 33, Dubai Healthcare City, Dubai, UAE | DHA License No: 1143 | Corporate Lab Branding: DNA Labs UAE |
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