Anti-Histone Antibody Test: Booking, Price, and Results
About Anti-Histone Antibody Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Anti-histone Antibodies Test, Histone Antibody Test, AHA Test, Histone IgG, Anti-Histone Ab |
| Sample Type | Venous blood (serum) |
| Fasting Required | No fasting needed |
| Report Time | 3 to 5 days |
| Recommended For | All genders and ages; commonly ordered for individuals on long-term medications linked to drug-induced lupus |
| Price | Starting at ₹1900 |
What Is an Anti-Histone Antibody Test?
The anti-histone antibody test is a test used to detect specific autoantibodies in the blood that mistakenly target histone proteins. Histones are proteins found inside the nucleus of cells, where they help package genetic material. This test is also called the anti-histone Ab test or histone autoantibodies test. A doctor may order it when a patient on long-term medication develops lupus-like symptoms.
What Does an Anti-Histone Antibody Test Measure?
The AHA test detects autoantibodies directed at histone proteins that make up chromatin (the material inside a cell's nucleus that contains DNA). The table below lists the components of the test.
| Component | What It Is |
|---|---|
| H1, H2A, H2B, H3, H4 | The five main histone protein subunits found in cell nuclei |
| H2A-H2B dimer | A pair of histone proteins that form part of the chromatin structure |
| H3-H4 tetramer | A cluster of four histone proteins within the chromatin complex |
Together, these components fall under the broader category of anti-nuclear antibodies (ANA), which are antibodies directed against parts of the cell's nucleus.
Why Is an Anti-Histone Antibody Test Done?
Doctors order the histone autoantibodies test when a patient shows signs that could point to an autoimmune condition, particularly one triggered by long-term medication use.
Common Symptoms That May Require This Test
The following symptoms often prompt a doctor to request this test:
- Joint pain (arthralgia) or swelling that resembles arthritis
- Persistent fatigue and fever
- Muscle pain (myalgia)
- Unexplained weight loss
- Skin rash or sensitivity to sunlight
- Flu-like symptoms that do not resolve
- Chest or breathing discomfort caused by inflammation around the lungs or heart
Conditions This Test Can Help Detect
This test can assist in identifying several autoimmune and related conditions, including:
- Drug-induced lupus erythematosus (DILE), where anti-histone antibodies are present in up to 95% of cases
- Systemic lupus erythematosus (SLE), where these antibodies appear in approximately 30 to 60% of patients
- Rheumatoid arthritis, Sjögren's syndrome, systemic sclerosis, Felty's syndrome, and primary biliary cirrhosis
- Juvenile idiopathic arthritis, uveitis (inflammation in the eye), and linear scleroderma (localised hardening of the skin)
Anti-Histone Antibody Test for Chronic Disease Monitoring
The anti-histone antibody test may be repeated over time to track changes in antibody levels. This is particularly useful for patients who have stopped taking a medication that triggered drug-induced lupus, as levels should fall once the drug is withdrawn. In patients with known autoimmune conditions, periodic testing can help monitor disease activity.
How to Prepare and What to Expect
Getting ready for the anti-histone antibody test is straightforward. Here is what you need to know before your sample is collected.
Do You Need to Fast?
No, fasting is not required. You can eat and drink normally before your appointment. However, if other tests are being done at the same time, your doctor will advise you if any of those require fasting.
Practical Tips Before Your Test
Following a few simple steps before your test can help ensure a smooth experience:
- Tell your doctor about all medications, supplements, and herbal remedies you are currently taking
- Bring a complete list of recent and current medicines, particularly those associated with drug-induced lupus, such as procainamide, hydralazine, isoniazid, or minocycline
- Drink enough water to stay well hydrated before blood collection
- No dietary restrictions are necessary
Step-by-Step Procedure
Here is what to expect during sample collection:
- A trained phlebotomist will clean the skin over a vein in your arm with an antiseptic solution.
- A thin needle is gently inserted into the vein.
- A small amount of blood (usually at least 1 mL of serum) is drawn into a collection tube.
- The needle is removed and a small bandage is placed over the site.
- Your blood sample is labelled and dispatched to the laboratory.
- In the lab, the sample is analysed using ELISA (enzyme-linked immunosorbent assay), which uses purified histones to detect antibodies.
Factors That Can Affect Accuracy
Several factors may influence your test results:
- Current or recent use of medications associated with drug-induced lupus
- Presence of other autoimmune or connective tissue conditions
- Timing of the sample relative to drug exposure
- Chronic infections, such as the Epstein-Barr virus, may cause these antibodies to appear
- Sample handling and storage conditions
- Differences in laboratory methods and reference ranges
Understanding Your Anti-Histone Antibody Test Results
Results from the anti-histone Ab test must always be reviewed by your doctor alongside your full medical history and medication records. The table below shows general reference values used in reporting.
| Result | Value | Unit | Interpretation |
|---|---|---|---|
| Negative | Less than 40 | U/mL | No detectable anti-histone antibodies |
| Positive | Greater than 40 | U/mL | Presence of anti-histone antibodies |
For ELISA-based testing, a value greater than 1.5 units relative to control serum is considered positive. Weakly positive results fall between 1.0 and 1.5 units, moderate results between 1.6 and 2.5 units, and strongly positive results above 2.5 units.
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.
Results During Special Conditions
Certain factors can make results harder to interpret.
- Most patients treated long-term with procainamide will eventually develop anti-histone antibodies, but only 10 to 20% of them show signs of active disease.
- Chronic infections such as Epstein-Barr virus infection may cause these antibodies to appear even in the absence of lupus. Antibody levels may also reflect how active the disease is at the time of testing.
How to Maintain Healthy Levels
The following general wellness steps are useful for anyone being monitored for autoimmune conditions:
- Ensure your doctor has a complete and up-to-date record of all medications if you are experiencing lupus-like symptoms
- Follow a balanced diet and get adequate rest to support overall immune health
- Attend all follow-up appointments, especially if you are on long-term medications associated with drug-induced lupus
Lupin Diagnostics Anti-Histone Antibody Test Price and Home Collection
The anti-histone antibody test price in India typically starts at around ₹1500 and varies by city and laboratory. Home sample collection is available through Lupin Diagnostics, making it easy to get tested from your home.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹1900 |
| Bangalore | ₹1900 |
| Hyderabad | ₹1900 |
| Chennai | ₹1900 |
| Kolkata | ₹1900 |
| Pune | ₹1900 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Here is how to book your anti-histone antibody test:
- 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-histone antibody test across multiple cities. All samples are processed in NABL-accredited laboratories staffed by experienced professionals. Your digital report is delivered directly to your email or WhatsApp once ready.
Frequently Asked Questions
The anti-histone antibody test is primarily used to help diagnose drug-induced lupus and to distinguish it from other autoimmune conditions such as systemic lupus erythematosus (SLE). It is usually ordered when a patient on long-term medication develops lupus-like symptoms. The result is interpreted alongside the patient's clinical history.
Well-established medications associated with drug-induced lupus include hydralazine, procainamide, isoniazid, minocycline, and quinidine. Others, such as chlorpromazine, methyldopa, and certain anti-TNF therapies, have also been implicated. Always share a full medication list with your doctor before testing.
No, a positive result alone is not enough to confirm a diagnosis. Around half of patients with SLE also carry histone autoantibodies without any drug trigger. Your doctor will consider the result alongside your symptoms, medication history, and other tests before drawing a conclusion.
Drug-induced lupus tends to be milder than SLE. Patients with drug-induced lupus typically do not have kidney or nervous system involvement, and they usually do not show multiple types of antinuclear antibodies. Symptoms often resolve within weeks of stopping the causative medication, unlike SLE, which is a long-term condition.
No, fasting is not required for this test. You can eat and drink normally before your appointment. If additional tests are ordered alongside this one, your doctor will let you know if any preparation is needed.
Results are typically available within 3 to 5 days. Lupin Diagnostics sends results by email or WhatsApp.
In most cases, once the suspected medication is discontinued, anti-histone antibody levels gradually decline. They may drop to very low or undetectable levels, though trace amounts can sometimes persist. Your doctor may repeat the test periodically to confirm that levels are falling.
Anti-Histone Antibody Test: Booking, Price, and Results
