Anti-Desmoglein III Antibody (DSG III) Test
About Anti-Desmoglein III Antibody (DSG III) Test
| Field | Value |
|---|---|
| Also Known As | DSG3 Antibody Test, Desmoglein III Antibody Test, Anti-DSG3 IgG |
| Sample Type | Venous blood (serum) |
| Fasting Required | Not required, but fasting overnight or waiting one hour after a meal is recommended to avoid a fatty serum sample |
| Report Time | Same day to 3 days |
| Recommended For | Adults of all genders; most commonly affects people over 40 |
| Price | Starting at ₹2600 |
What Is an Anti-Desmoglein III Antibody (DSG III) Test?
The anti-desmoglein III antibody (DSG III) test measures the level of antibodies against a skin protein called desmoglein 3 in your blood. Desmoglein 3 helps hold skin cells together, and when the immune system attacks it, painful blisters and sores can form. Doctors use this test to investigate suspected autoimmune blistering conditions affecting the skin and mucous membranes. It is also known as the DSG3 antibody test, and the sample collected is a small amount of blood from a vein in your arm.
What Does an Anti-Desmoglein III Antibody (DSG III) Test Measure?
This test detects and measures a specific type of antibody (IgG) directed against the desmoglein 3 protein. Desmoglein 3 is found mainly in the deeper layers of the skin, the lining of the mouth, and the oesophagus. The following parameter is reported:
| Parameter | What It Means |
|---|---|
| Anti-Desmoglein 3 (DSG3) IgG | Measures the level of IgG antibodies targeting the desmoglein 3 protein; reported as negative or positive based on the measured value |
When these antibodies are present, they disrupt the protein that keeps skin cells bonded together, which can lead to blistering and erosions on the skin or inside the mouth.
Why Is an Anti-Desmoglein III Antibody (DSG III) Test Done?
Doctors order anti-desmoglein III antibody test when a patient shows signs that suggest an autoimmune blistering disorder.
Common Symptoms That May Require This Test
The following symptoms commonly prompt a doctor to request this test:
- Blisters on the skin that burst easily and leave raw, painful patches
- Painful sores or ulcers inside the mouth or throat
- Difficulty swallowing or eating due to mouth and throat involvement
- Persistent unexplained skin erosions that do not heal normally
- Sores on other mucous membranes, such as the nose or eyes
- General skin tenderness without an obvious cause
Conditions This Test Can Help Detect
This test supports the identification of several blistering conditions:
- Pemphigus vulgaris, an autoimmune disorder where the body attacks desmoglein 3, causing blisters on the skin and mucous membranes.
- Paraneoplastic pemphigus, a rare blistering condition linked to an underlying tumour, in which DSG3 antibodies are frequently detected.
- Mucocutaneous pemphigus, where antibodies to both DSG3 and sometimes DSG1 are present.
Anti-Desmoglein III Antibody (DSG III) Test for Chronic Disease Monitoring
Once a diagnosis of Pemphigus vulgaris is confirmed, this test plays an important role in tracking how well treatment is working. Antibody levels tend to reflect disease activity, with higher levels seen during active disease and lower levels expected as the condition improves. Repeat testing at regular intervals helps doctors adjust treatment plans based on the patient's response.
How to Prepare and What to Expect
The anti-desmoglein III antibody test procedure is quick and simple.
Do You Need to Fast?
Fasting is not strictly required for this test. However, it is advisable to either fast overnight or wait at least one hour after eating before the blood is drawn. This helps prevent a fatty (lipemic) serum sample, which can interfere with the accuracy of the result.
Practical Tips Before Your Test
A few simple steps can help ensure a good quality sample:
- Tell your doctor about all medications you are taking, especially those that affect the immune system, such as steroids or immunosuppressants.
- Mention any recent infections, as these may affect your result.
- Wear a comfortable top or shirt that allows easy access to your arm.
- Stay well hydrated before your appointment.
- Avoid strenuous physical activity immediately before the blood draw.
Step-by-Step Procedure
The sample collection process is brief and usually over within five minutes:
- A trained phlebotomist cleans a small area on your arm and draws blood from a vein using a fine needle.
- The blood is collected into a tube and allowed to separate into serum.
- The entire blood draw typically takes no more than five minutes, and the sample is then dispatched for processing.
- The serum is carefully transferred into a plastic vial for laboratory analysis. In the laboratory, the serum is tested using an ELISA method.
Factors That Can Affect Accuracy
Certain conditions can influence the test result:
- Immunosuppressive medications taken before the test.
- Recent infections or active illness.
- A lipemic (fatty) serum sample.
- Haemolysis (damaged red blood cells) in the sample.
- Improper sample storage or handling before analysis.
Understanding Your Anti-Desmoglein III Antibody (DSG III) Test Results
Your results will show whether DSG3 antibodies were detected and at what level. Always review your results with your doctor, as the numbers alone do not give the full picture.
| Parameter | Negative (Normal) | Positive |
|---|---|---|
| Anti-DSG3 IgG | Below 20 RU/mL | 20 RU/mL or above |
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 negative result suggests that DSG3 antibodies are not present, though it does not completely rule out pemphigus. Higher levels are generally seen in more active or severe disease.
Results During Special Conditions
Some situations can affect how results are interpreted:
- Lipemic, haemolysed, or icteric samples may produce inaccurate readings and may require a repeat test.
- Immunosuppressive medications and recent infections may alter antibody levels, making results harder to interpret without clinical context.
- In some patients with pemphigus vulgaris, antibody levels remain elevated even when the disease is in remission, so a positive result does not always mean active disease.
How to Maintain Healthy Levels
While there is no way to prevent autoimmune conditions entirely, a few general habits support overall wellbeing:
- Attend all scheduled follow-up appointments so your doctor can track changes in antibody levels over time.
- Follow your prescribed treatment plan consistently.
- Protect your skin from minor injuries, as trauma can trigger new blisters in pemphigus.
- Maintain a balanced diet and adequate rest to support your body's general health during and after treatment.
Lupin Diagnostics Anti-Desmoglein III Antibody (DSG III) Test Price and Home Collection
The anti-desmoglein III antibody test price starts at approximately ₹2600, and home collection is available across major Indian cities. The table below gives an approximate city-wise price guide.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹2600 |
| Bhopal | ₹2600 |
| Hyderabad | ₹2600 |
| Bangalore | ₹2600 |
| Chennai | ₹2600 |
| Pune | ₹2600 |
| Kolkata | ₹2600 |
| Guwahati | ₹2600 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- 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 for the anti-desmoglein III antibody test across cities in India, so you can have your blood drawn without visiting a centre. All samples are processed in NABL-accredited laboratories staffed by qualified professionals. Your digital report is shared securely via email or WhatsApp once ready.
Frequently Asked Questions
This test is the preferred screening tool for patients suspected of having an autoimmune blistering disorder of the skin or mucous membranes. It is most commonly used to diagnose and monitor Pemphigus vulgaris and related conditions. A positive result prompts further clinical evaluation.
Fasting is not strictly required, but it is advisable to fast overnight or wait at least one hour after a meal before your blood draw. This helps prevent a fatty (lipemic) serum sample, which can interfere with accurate test results.
A positive result means that antibodies against desmoglein 3 were detected in your blood. This is associated with an autoimmune condition called Pemphigus vulgaris, but a positive result alone does not confirm a specific diagnosis. Your doctor will use this finding alongside clinical examination and other tests to reach a conclusion.
Yes. Antibody levels measured by the anti-desmoglein 3 antibody test often reflect disease activity. Levels are expected to fall as the condition improves with treatment. Regular repeat testing during follow-up helps your doctor assess your response to therapy.
Pemphigus vulgaris is an autoimmune condition in which the immune system mistakenly attacks the proteins that hold skin and mucous membrane cells together. This causes painful blisters and erosions on the skin and inside the mouth. It is the condition most closely associated with elevated DSG3 antibody levels. Early diagnosis and treatment are important to prevent complications.
The anti-desmoglein III antibody test involves minimal risk. You may experience slight soreness or mild bruising at the site where blood is drawn, but this usually resolves quickly. There are no significant side effects.
Doctors often request additional tests to confirm a diagnosis. These may include a skin biopsy, indirect immunofluorescence testing, and an anti-desmoglein 1 antibody test. Together, these results help distinguish between different types of pemphigus and guide treatment decisions.
Anti-Desmoglein III Antibody (DSG III) Test: Booking, Price, and Results
