Anti-Soluble Liver Antigen (SLA) Antibody Test
About Anti-Soluble Liver Antigen (SLA) Antibody Test
| Field | Value |
|---|---|
| Also Known As | Anti-SLA IgG, Anti-SLA/LP Antibody, Soluble Liver Antigen Antibody, Anti-Liver Pancreas Antibody |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting required |
| Report Time | 5 to 7 days (weekly batched test) |
| Recommended For | Adults and children of all genders; particularly those with suspected autoimmune liver disease |
| Price | Starting at ₹1,950 |
What Is an Anti-Soluble Liver Antigen (SLA) Antibody Test?
The Anti-Soluble Liver Antigen Antibody test checks your blood for specific antibodies that target proteins found inside liver cells. In a healthy immune system, these proteins are left alone. When the immune system mistakenly attacks them, these antibodies appear in the blood. The test is also referred to as the Anti-SLA IgG test or Anti-SLA/LP Antibody test. Doctors order it when autoimmune liver disease, particularly autoimmune hepatitis, is suspected.
What Does an Anti-Soluble Liver Antigen (SLA) Antibody Test Measure?
This test detects one specific type of antibody in your blood sample. The table below explains what is being measured and why it matters.
| Parameter | What It Detects | Why It Matters |
|---|---|---|
| Anti-SLA (IgG) Antibodies | Antibodies targeting a protein complex inside liver cells, involved in producing selenium-containing proteins | Their presence strongly suggests an autoimmune attack on the liver, particularly autoimmune hepatitis |
Why Is an Anti-Soluble Liver Antigen (SLA) Antibody Test Done?
Doctors request this test when a patient has symptoms that point to possible liver inflammation caused by the immune system. Below are the common reasons this test is ordered.
Common Symptoms That May Require This Test
The following symptoms are among those that can prompt a doctor to request an Anti-SLA IgG test:
- Persistent fatigue and a general feeling of being unwell
- Jaundice, which is the yellowing of the skin and the whites of the eyes
- Pain or discomfort in the abdomen
- Joint pain affecting one or more joints
- Nausea with no clear cause
- Itching of the skin
- Enlarged liver or spider-like blood vessels visible on the skin
Conditions This Test Can Help Detect
The Anti-Soluble Liver Antigen Antibody test may help identify the following conditions:
- Autoimmune hepatitis (AIH) Type 1, where this antibody may sometimes be the only detectable autoantibody
- Cryptogenic hepatitis — unexplained chronic hepatitis — that points towards AIH Type 1
- Primary biliary cirrhosis-AIH overlap syndrome
- In children, this antibody has also been found in AIH Type 2 and autoimmune sclerosing cholangitis
How to Prepare and What to Expect
No special preparation is needed for this test, which makes it straightforward for most patients. Here is what you should know before your appointment.
Do You Need to Fast?
No, fasting is not required before the Anti-Soluble Liver Antigen Antibody test. You can eat and drink as normal. However, tell your doctor about all your current medicines, including prescription drugs, over-the-counter tablets, and dietary supplements, since some can affect liver function results.
Practical Tips Before Your Test
Keep the following points in mind before you go for sample collection:
- Let your doctor know if you are taking any immunosuppressant medicines, as these may influence antibody levels.
- Drink enough water before the blood draw to stay well hydrated.
- Wear clothing with sleeves that can be rolled up easily to allow access to the inner elbow.
Step-by-Step Procedure
Here is what happens during sample collection, from start to finish:
- A trained phlebotomist cleans the skin at the inner elbow with an antiseptic wipe.
- A small needle is inserted into a vein to draw a blood sample into a collection tube.
- The needle is removed, and light pressure is applied to the site for a moment.
- The serum (the liquid part of blood) is separated from the cells within an hour of collection.
- The sample is labelled and prepared for dispatch to the laboratory.
- At the lab, the sample undergoes ELISA or immunoblot testing to detect antibody levels.
Factors That Can Affect Accuracy
Certain conditions may affect how reliable your results are:
- Samples that are haemolysed (containing damaged red blood cells), contaminated, or lipid-heavy may produce inaccurate readings.
- Heat-inactivated specimens can interfere with the test.
- Immunosuppressive medications taken before the test may lower antibody levels and affect interpretation.
- Concurrent viral hepatitis infection can make results harder to interpret.
Understanding Your Anti-Soluble Liver Antigen (SLA) Antibody Test Results
Your results will show whether anti-SLA antibodies were detected in your blood sample. Always review your report with a qualified doctor who can place the findings in the context of your symptoms and medical history.
| Result | Range | Interpretation |
|---|---|---|
| Negative | Less than 20 U | No antibodies detected |
| Borderline | 20 to 25 U | Indeterminate; repeat testing may be recommended |
| Positive | Greater than 25 U | Antibodies detected; suggests autoimmune hepatitis |
These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
A positive Anti-SLA IgG test result has very high specificity for autoimmune hepatitis, meaning a false positive is uncommon. However, anti-SLA antibodies are found in only 10-30% of patients with autoimmune hepatitis, so a negative result does not rule out the condition. Other autoantibody tests may also be ordered alongside this one.
Results During Special Conditions
Certain circumstances can affect how results are interpreted:
- Patients on immunosuppressive therapy may show lower antibody levels, which can make a positive result harder to detect.
- Active viral hepatitis infections present at the same time may complicate interpretation and require additional testing.
- Poor sample quality due to haemolysis, lipaemia, or contamination can produce unreliable readings, and retesting may be needed.
How to Maintain Healthy Levels
These general wellness habits support liver health:
- Follow a balanced diet with plenty of vegetables, fruits, and whole grains, and limit processed and fatty foods.
- Avoid excessive alcohol, which places additional strain on the liver.
- Attend follow-up appointments with a hepatologist or gastroenterologist for a complete liver health review.
Lupin Diagnostics Anti-Soluble Liver Antigen (SLA) Antibody Test Price and Home Collection
The Anti-Soluble Liver Antigen Antibody test is available at Lupin Diagnostics with home sample collection across major Indian cities. Prices vary by location, as shown below:
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹1,950 |
| Bengaluru | ₹1,950 |
| Chennai | ₹1,950 |
| Hyderabad | ₹1,950 |
| Kolkata | ₹1,950 |
| Pune | ₹1,950 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Follow these steps to book your Anti-SLA IgG test near me or at a centre of your choice:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
Lupin Diagnostics offers home sample collection across cities, so you do not need to travel to a centre if that is more convenient. All samples are processed in NABL-accredited laboratories staffed by experienced technologists. Once ready, your digital report is sent directly to you via email or WhatsApp.
Frequently Asked Questions
The Anti-Soluble Liver Antigen Antibody test is used to detect antibodies that the immune system produces against proteins in liver cells. It helps doctors diagnose autoimmune hepatitis and related autoimmune liver conditions. It is particularly useful when other autoantibody tests return negative results.
The Anti-SLA IgG test has very high specificity for autoimmune hepatitis, meaning a positive result strongly points to this condition. However, the test detects antibodies in only 10 to 30% of patients with autoimmune hepatitis Type 1. A positive result is highly meaningful, but a negative result does not exclude the diagnosis.
No, a negative result does not rule out autoimmune hepatitis. Since anti-SLA antibodies are present in only a minority of patients with the condition, other autoantibody tests such as ANA, ASMA, and anti-LKM1 may be ordered as part of a full evaluation.
No fasting is needed before this test. You can eat and drink normally before your appointment. Let your doctor know about any medicines or supplements you are taking, especially immunosuppressants.
Doctors often order the Anti-Soluble Liver Antigen Antibody test as part of a broader evaluation for autoimmune liver disease. Related tests include antinuclear antibody (ANA), anti-smooth muscle antibody (ASMA), anti-liver kidney microsomal antibody (anti-LKM1), and standard liver function tests.
A positive result is associated with more severe forms of autoimmune hepatitis and may indicate a more serious disease course. Your doctor will review the result alongside your full clinical picture, including other test findings and your symptoms, before discussing next steps.
Anti-Soluble Liver Antigen (SLA) Antibody Test
