Sickle Cell Anemia (HbS) Mutation Analysis Test
About Sickle Cell Anemia (HbS) Mutation Analysis Test
| Field | Value |
|---|---|
| Also Known As | HbS Mutation Analysis Test, Sickle Cell Gene Analysis Test, Sickle Cell Genetic Testing, HBB Gene Mutation Detection Test, Sickle Cell DNA Test |
| Sample Type | Chorionic Villus (CVS), Amniotic Fluid, Cord Blood, Peripheral Blood |
| Fasting Required | No |
| Report Time | 15 Days |
| Recommended For | All ages, both genders; particularly those with a family history of sickle cell disease, individuals from high-risk populations (tribal, African, Mediterranean, or Middle Eastern ancestry), and couples planning pregnancy |
| Price | Starting at ₹3,300 |
What Is a Sickle Cell Anemia (HbS) Mutation Analysis Test?
The Sickle Cell Anemia (HbS) Mutation Analysis test is a molecular genetic test that detects a specific mutation in the HBB gene (the gene responsible for producing beta-globin, a component of hemoglobin). This mutation causes the body to produce abnormal hemoglobin S (HbS), which distorts red blood cells into a sickle shape.
The test is also known as the HbS Mutation Analysis test or the Sickle Cell DNA test, and it uses the Sanger Sequencing method to confirm the exact genetic change. Samples may be collected as chorionic villus tissue, amniotic fluid, cord blood, or peripheral blood, depending on the clinical situation.
What Does a Sickle Cell Anemia (HbS) Mutation Analysis Test Measure?
This test examines the HBB gene at the molecular level to identify one or more specific genetic changes. The key findings it provides are listed below.
| What Is Assessed | What It Tells You |
|---|---|
| HBB gene mutation (Glu6Val) | Whether the sickle cell-causing mutation is present; this is where glutamic acid is replaced by valine at position 6 of the beta-globin chain |
| Gene copy status | Whether one copy (carrier) or two copies (affected) of the mutated gene are present |
| Genotype confirmation | Distinguishes between HbSS (sickle cell anemia), HbSC, sickle-beta-thalassemia, and related conditions |
Why Is a Sickle Cell Anemia (HbS) Mutation Analysis Test Done?
A doctor may order the Sickle Cell Anemia (HbS) Mutation Analysis test for several reasons, including confirming a suspected diagnosis, screening high-risk individuals, or guiding decisions around family planning.
Common Symptoms That May Require This Test
The following symptoms may prompt a doctor to request this test:
- Recurrent episodes of pain, particularly in the chest, abdomen, or joints (sickle cell crises)
- Persistent tiredness or breathlessness due to anemia (low hemoglobin)
- Frequent infections, especially in childhood
- Unexplained swelling of the hands and feet
- Delayed growth or puberty
- Signs of stroke or neurological episodes in a young person
- Acute chest syndrome (chest pain, fever, and difficulty breathing)
Conditions This Test Can Help Detect
The test helps identify or confirm the following conditions.
- Sickle cell anemia (HbSS), the most common and severe form of sickle cell disease
- Sickle cell trait (AS genotype), where an individual carries one normal gene and one sickle gene
- Compound heterozygous forms such as sickle-hemoglobin C disease (HbSC), sickle-β+-thalassemia, and sickle-β0-thalassemia
Sickle Cell Anemia (HbS) Mutation Analysis Test During Pregnancy
Genetic testing for the HbS mutation is a key part of preconception and prenatal care for couples who may carry the sickle cell gene. If both partners are carriers, there is a one-in-four chance that each pregnancy could result in a child with sickle cell disease. Prenatal diagnosis can be performed using chorionic villus sampling (CVS) or amniotic fluid, allowing families to make informed reproductive decisions with guidance from a genetic counsellor.
How to Prepare and What to Expect
The Sickle Cell Anemia (HbS) Mutation Analysis test procedure is straightforward, but a few preparations will help ensure the sample is suitable for analysis.
Do You Need to Fast?
No, fasting is not required before this test. You may eat and drink normally on the day of collection.
Practical Tips Before Your Test
The following steps will help make your visit smooth and ensure accurate results:
- Bring a detailed clinical history, including your symptoms, previous test results, and family history, as this is required for the test
- Carry any previous HPLC, hemoglobin electrophoresis, or solubility test reports if available
- Inform the doctor or phlebotomist if you have had a recent blood transfusion, as it helps the pathologist correlate this genetic report with any previous protein-based screening tests
- Genetic counselling before testing is recommended, especially if the test is for family planning purposes
- Wear comfortable, loose-fitting clothing with easy access to the arm for blood collection
Step-by-Step Procedure
The sample collection process varies depending on the sample type required. Your doctor will advise which sample is appropriate for your situation.
For Peripheral Blood:
- A trained phlebotomist will tie a tourniquet around your upper arm to make the vein visible and clean the area with an antiseptic.
- A sterile needle is used to draw a small volume of blood. You may feel a brief, mild prick at this point.
- The blood is collected into a special tube and labelled with your details.
- The needle is removed and a small bandage is applied. The process typically takes just a few minutes.
- The sample is stored at 2 to 8 degrees Celsius and sent to the laboratory for Sanger Sequencing analysis.
For Chorionic Villus (CVS) or Amniotic Fluid (Prenatal Testing):
- This procedure is performed by a specialist doctor, usually between 10 and 20 weeks of pregnancy.
- A small sample of chorionic villus tissue or amniotic fluid is collected using a sterile needle or catheter under ultrasound guidance.
- The sample is placed in a sterile container and labelled carefully.
- It is refrigerated and dispatched promptly to the laboratory.
- The sample undergoes DNA extraction and Sanger Sequencing to identify the HbS mutation.
- Results are typically available within 15 days.
Factors That Can Affect Accuracy
The following factors may influence the accuracy or interpretation of your results:
- Recent blood transfusions, which can distort traditional protein-based screening tests but generally do not alter this molecular DNA test
- Inadequate sample volume or improper storage during transport
- Rare or atypical genetic variants that may require additional testing
- Incomplete clinical history provided at the time of sample submission
Understanding Your Sickle Cell Anemia (HbS) Mutation Analysis Test Results
Results from the Sickle Cell Anemia (HbS) Mutation Analysis test should always be reviewed with a doctor or genetic counsellor who is familiar with your full medical and family history. The table below outlines general interpretation guidelines.
| Result | Interpretation |
|---|---|
| HbS mutation not detected | No sickle cell gene variant present; the individual is not a carrier and does not have sickle cell disease |
| HbS mutation detected (heterozygous, one copy) | Sickle cell trait (carrier status); the individual will not develop sickle cell disease but can pass the gene to their children |
| HbS mutation detected (homozygous, two copies) | Sickle cell anemia (HbSS); the individual has sickle cell disease |
Disclaimer: This information is a general guide. Your doctor will review your genetic results alongside your age, health history, and other clinical findings. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Recent blood transfusions may distort traditional hemoglobin protein assays, but they do not alter this molecular DNA test; inform your doctor if you have received a transfusion recently. When hemoglobin assay shows HbS as the only adult beta chain, this may indicate either HbSS or sickle-β0-thalassemia, and molecular testing by Sanger Sequencing is the most reliable method for distinguishing between the two.
Essential Guidance and Wellness Support
For individuals identified as carriers or affected by sickle cell disease, the following general wellness tips may be helpful:
- Stay well hydrated by drinking adequate water daily, as dehydration can worsen symptoms in those with sickle cell disease
- Eat a varied diet rich in fruits, vegetables, and foods containing folic acid, which supports healthy red blood cell production
- Seek genetic counselling if you are a carrier and planning a family, to understand the reproductive risks and available options
Lupin Diagnostics Sickle Cell Anemia (HbS) Mutation Analysis Test Price
The Sickle Cell Anemia (HbS) Mutation Analysis test is available at Lupin Diagnostics starting at ₹3,300. This test requires a visit to a Lupin Diagnostics centre for sample submission and processing.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 3300 |
| CHENNAI | 3300 |
| HYDERABAD | 3300 |
| KOLKATA | 3300 |
| NAVI MUMBAI | 3300 |
| PUNE | 3300 |
Disclaimer: 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 Sickle Cell Anemia (HbS) Mutation Analysis test online:
- Select the test on the Lupin Diagnostics website
- Choose your city and preferred centre location
- Visit the selected Lupin Diagnostics centre or follow the instructions provided for the submission of the required sample type
- Receive your report via email or WhatsApp within the stipulated turnaround time
Frequently Asked Questions
Routine screening tests such as hemoglobin solubility tests or HPLC detect abnormal hemoglobin but may not clearly distinguish between all disease subtypes. The Sickle Cell Anemia (HbS) Mutation Analysis test uses Sanger Sequencing to confirm the exact genetic change, providing a definitive diagnosis and distinguishing between carrier status and disease.
This test is recommended for individuals with symptoms suggestive of sickle cell disease, those with a family history of the condition, people from high-risk populations (including tribal communities in India), and couples planning a pregnancy where one or both partners may carry the sickle cell gene.
Yes. Prenatal diagnosis can be carried out using a chorionic villus sample or amniotic fluid obtained under specialist supervision. This is particularly relevant for couples where both partners carry the sickle cell gene and wish to know the genetic status of the pregnancy.
Carriers (those with sickle cell trait) generally do not develop sickle cell disease and often have no symptoms. However, they can pass the gene to their children. If both parents are carriers, the risk of having a child with sickle cell disease is one in four.
Sickle cell disease has a significant presence in India, particularly among tribal populations. The proportion of carriers among different tribal groups ranges from 1 to 40 per cent. Madhya Pradesh carries one of the highest burdens, with large numbers of both carriers and affected individuals recorded.
Because the test uses specialised DNA sequencing, the report takes up to 15 days from the time the sample reaches the laboratory. Your doctor will notify you once the report is ready.
Genetic counselling is strongly recommended for anyone found to be a carrier or affected individual, especially if they are planning to have children. A genetic counsellor can help you understand your results, explain the likelihood of passing the condition to offspring, and discuss reproductive options in an objective and supportive manner.
Sickle Cell Anemia (HbS) Mutation Analysis Test
