Ganglioside GM1 Antibody (Qualitative) by Line Blot Immunoassay
This test detects antibodies against a specific type of ganglioside, a sugar-lipid molecule found in nerve cells. It may help diagnose conditions affecting the nervous system.
This test helps identify potential nerve-related disorders by checking for unusual immune responses.
Key facts at a glance
- LOINC
- 82411-0
- Short code
- GT1a Gangl IgG Ser Ql Line blot
- Synonyms
- GT1a Gangl IgG Ser Ql Line blot
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- line-blot
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why Might This Test Be Ordered?
Your doctor may recommend this test if you have symptoms like muscle weakness, balance issues, or nerve-related problems that don’t have obvious causes. It could also be part of evaluating conditions like Guillain-Barré syndrome, certain autoimmune diseases, or hereditary neuropathies.
What Does a Positive Result Mean?
A positive result suggests the presence of antibodies targeting GM1 ganglioside, which may indicate an immune-mediated nerve disorder. This doesn’t always mean you have a specific disease, but it can guide further testing or treatment.
What to Expect During the Test
A blood sample is drawn from a vein in your arm. The sample is then analyzed using a line blot immunoassay to detect specific antibodies. Results are qualitative (yes/no) rather than a numeric value.
Common Conditions Monitored or Diagnosed
This test is often used to support a diagnosis of conditions like chronic inflammatory demyelinating polyneuropathy (CIDP), Guillain-Barré syndrome variants, or other autoimmune neuropathies where nerve antibodies play a role.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Gangliosides are complex molecules on nerve cell surfaces. Antibodies attacking these molecules can disrupt nerve function, leading to symptoms like numbness, weakness, or sensory disturbances. While this test doesn’t diagnose a specific condition alone, it helps identify a potential immune-mediated process affecting nerves. Further evaluation may include additional tests or clinical correlation to determine the exact cause and appropriate treatment.
Short name
GM1 Antibody Screening/Confirmation
Frequently asked questions
What does a positive result mean for my health?
Will I need more tests if this result is positive?
Can lifestyle changes help if this test is positive?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy