Acid lipase disorder Wolman diseaase Test in UAE

Acid Lipase Disorder (Wolman Disease) Test in Dubai and across the UAE to diagnose a rare but life-threatening inherited metabolic condition. This test detects deficiencies in the **lysosomal acid lipase (LAL) enzyme**, confirming Wolman disease — a severe form of lysosomal acid lipase deficiency (LAL-D) that affects infants and leads to rapid organ damage. Results available within 15–20 days.

Overview

The Acid Lipase Disorder (Wolman Disease) Test measures the activity of the **lysosomal acid lipase (LAL) enzyme** in white blood cells or dried blood spots. Wolman disease is a rare autosomal recessive disorder caused by mutations in the *LIPA* gene, leading to near-complete loss of LAL enzyme function. Without this enzyme, fats (cholesteryl esters and triglycerides) accumulate in vital organs like the liver, spleen, adrenal glands, and intestines. This progressive buildup causes liver failure, malnutrition, and adrenal calcification, typically appearing in the first weeks of life. Due to its severity, early diagnosis is critical. Results are typically available within 15–20 business days after sample receipt at a specialized reference laboratory.

Why You Need This Test

• Confirm suspected Wolman disease in newborns or infants with failure to thrive.
• Evaluate unexplained hepatomegaly (enlarged liver), splenomegaly, or adrenal calcification.
• Diagnose severe malabsorption, chronic diarrhea, or vomiting in early infancy.
• Assess infants with jaundice, liver dysfunction, or low albumin.
• Follow-up abnormal newborn screening results suggestive of metabolic disorders.
• Provide definitive diagnosis before considering treatments like enzyme replacement therapy (ERT) or hematopoietic stem cell transplant (HSCT).
• Available with home blood collection service across Dubai, Abu Dhabi, Sharjah, and all Emirates.

Symptoms & Risk Factors

Common Symptoms in Infants

• Poor weight gain or failure to thrive despite adequate feeding
• Severe diarrhea or fatty stools (steatorrhea)
• Vomiting, abdominal distension
• Enlarged liver and spleen (hepatosplenomegaly)
• Jaundice and liver dysfunction
• Adrenal gland calcification (seen on imaging)
• Progressive lethargy, weakness, or feeding difficulties

Risk Factors

• Family history of Wolman disease or unexplained infant death
• Consanguineous parents (common in certain populations in the UAE and Middle East)
• Known carrier status of *LIPA* gene mutation in parents
• Ethnic predisposition: higher incidence in Iranian Jewish, Arab, and South Asian communities
• Abnormal metabolic screening or elevated liver enzymes in newborns

How the Test Works

Wolman disease results from deficient activity of the lysosomal acid lipase (LAL) enzyme, which is essential for breaking down fats inside cells. The test evaluates how well this enzyme functions in white blood cells (leukocytes) or dried blood spots.

• Step 1 — Sample collection: a small blood sample is drawn from a vein (infants may require specialized pediatric phlebotomy).
• Step 2 — Sample type: fresh blood in anticoagulant tube (for leukocyte assay) or dried blood spot (DBS) on filter paper.
• Step 3 — Transport: samples shipped under controlled conditions to an international reference lab.
• Step 4 — Enzyme assay: LAL enzyme activity is measured using fluorometric or mass spectrometry methods.
• Step 5 — Genetic correlation: if enzyme deficiency is confirmed, DNA testing (*LIPA* gene sequencing) may follow.
• Step 6 — Results: delivered securely within 15–20 business days.

This test is crucial for early diagnosis and intervention in a rapidly progressive, often fatal condition.

Sample Type

• We take: Whole blood (EDTA or heparin) for leukocyte enzyme assay or dried blood spot (DBS) on filter paper
• Volume: 2–5 mL blood (depending on age); 3–5 spots for DBS (each ≥12 mm)
• Container: lavender-top tube (EDTA) or specialized DBS card
• How it’s collected: venous blood draw by trained pediatric phlebotomist; home collection available
• Storage & Transport: refrigerated (2–8°C) if testing locally; DBS dried and shipped at room temperature
• Note: hemolyzed or clotted samples may be rejected; prompt shipping is essential

Risks & Safety

• Minimal risk — standard blood draw, similar to routine lab tests.
• Slight pain or bruising at the needle site, especially in infants.
• No fasting or special preparation required.
• Safe for newborns and infants when performed by experienced staff.

Result Interpretation

Normal Range

• Normal LAL enzyme activity: >1.0 nmol/h/mg protein (lab-dependent)
• Levels vary slightly by method and lab; comparison to controls is critical

Deficient Activity

• Severely reduced or absent LAL activity confirms diagnosis of Wolman disease
  • Typically <5–10% of normal activity
  • Correlates with rapid clinical progression

Partial Deficiency

• May indicate cholesteryl ester storage disease (CESD), a milder, later-onset form of LAL-D
• Requires further genetic testing and clinical evaluation

Consequences if Untreated

• Progressive liver failure leading to cirrhosis and death within 6–12 months
• Malnutrition and growth failure due to fat malabsorption
• Adrenal insufficiency from gland destruction and calcification
• Life-threatening infections due to weakened immunity
• Multi-organ damage affecting spleen, intestines, and vascular system
• Without treatment, Wolman disease is fatal in infancy

Factors Affecting Test Results

• Sample quality: hemolysis, clotting, or delays in transport can affect enzyme activity
• Type of sample: leukocytes are preferred; plasma testing is not reliable for diagnosis
• Recent blood transfusion: can mask enzyme deficiency (donor cells may have normal activity)
• Lab methodology: must use validated assays for LAL — not all labs offer this rare test
• Genetic variants: some mutations may allow residual enzyme activity, altering severity

FAQs

Limitations

• Test requires specialized international labs — not performed locally in most UAE facilities.
• Turnaround time is longer (15–20 days) due to overseas processing.
• Enzyme testing alone may not distinguish between Wolman and CESD — genetic testing is often needed.
• False negatives possible after blood transfusion.
• Requires expert interpretation in clinical context — not a screening tool for general population.

Book Your Acid Lipase Disorder (Wolman Disease) Test Today

Early diagnosis saves lives. If your infant shows signs of metabolic distress, get a definitive answer quickly with advanced enzyme testing.

• Home Blood Collection Available (Dubai, Abu Dhabi, Sharjah & all Emirates)
• Expert Pediatric Phlebotomy with Minimal Discomfort
• Results in 15–20 Days
• Price: AED 2,000
• ✅ International Reference Lab | Gold-Standard Enzyme Assay
• 📦 Secure Sample Shipping & Tracking
• 🔒 Confidential Results & Genetic Counseling Support