Asialoganglioside IgM
Gangliosides are glycosphingolipids. Asialoganglioside has important physiological properties and impacts neuronal plasticity and repair mechanisms, as well as the release of neurotrophins in the brain. Asialoganglioside acts as the site of binding for both Cholera toxin and E. coli.
Clinical Significance:
Asialoganglioside is exposed at the surface of spinal motor neurons, and in the peripheral nerves, it is limited to the node and paranodal region. Low levels of antibodies can be found in normal individuals and in patients with certain autoimmune disorders, however, high titers may be helpful in the diagnosis of multifocal motor neuropathy with conduction block (MMNCB), and paraproteinenia including motor neuron disease and multifocal motor neuropathy.
Autoantibodies to ganglioside GM1 are thought to be involved in the pathophysiology of some motor neuropathies due to relatively high level detection prior to therapeutic intervention, and a subsequent decrease of antibodies concurrent with clinical improvement.
High titers of IgM Antiganglioside GM1 may be etiologically important in certain types of motor neuropathy, while on the other hand, low levels of antibodies may represent B-cell dysfunctional regulation. The origin of anti-ganglioside antibodies is unknown, however, it is speculated that they can be formed against certain infectious microorganisms. Campylobacter jejuni has been identified as a frequent cause of Guillain Barré syndrome and Miller Fisher syndrome; during infection of C. jejuni anti-GM1 antibodies bind with whole cells of different C. jejuni isolates. Likewise, this occurs with Streptococcal infection, which is a trigger for PANDAS, the adult version, ANDAS and OCD.
References:
(https://www.cyrexlabs.com/Portals/0/Docs/SpecSheetPDFs/ASIALOGANGLIOSIDE.pdf)
1. Baba, et al. Anti-GM1 ganglioside antibodies with differing fine specificities in patients with multifocal motor neuropathy. J Neuroimmunol, 1989; 25:143-150.
2. Bansal, et al. IgM ganglioside GM1 antibodies in patients with autoimmune disease or neuropathy, and controls. J Clin Pathol, 1994; 14:300-302.
3. Jacobs, et al. Cross-reactive antibodies against gangliosides and Campylobacter jejuni lipopolysaccharides in patients with Guillain-Barré or Miller Fisher syndrome. J Infect Disease, 1997; 175:729-733.
4. Mertens, et al. Molecular analysis of cross-reactive anti-myosin/anti-streptococcal mouse monoclonal antibodies. Molecular Immunol, 2000; 37(15):901-913.
5. Vojdani. Obsessive compulsive disorder and differentiation between non-autoimmune OCD and the autoimmune version of the disease called PANDAS. Latitudes, 6(2):1-6
6. Vojdani and Tarash. Cross-reaction between gliadin and different food and tissue antigens, Food Nutri Sci, 2013; 4:20-32.
What does it mean if your Asialoganglioside IgM result is too high?
Antibodies Appear in:
- Chronic Inflammatory Demyelinating
- Polyneuropathy
- Cerebrovascular Accidents
- Cranial Trauma
- Guillain Barre Syndrome
- Miller Fisher Syndrome
- Motor Neuron Disease
- MMNBC
- Multifocal Motor Neuropathy
- Multiple Sclerosis
- Myasthenia Gravis
- PANDAS / ANDAS / OCD
- Rheumatoid Arthritis
- Sensorimotor Neuropathy
- Systemic Lupus Erythematosus
High titers may be helpful in the diagnosis of multifocal motor neuropathy with conduction block (MMNCB), and paraproteinenia including motor neuron disease and multifocal motor neuropathy.
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What does it mean if your Asialoganglioside IgM result is too low?
Low levels of antibodies can be found in normal individuals and in patients with certain autoimmune disorders.
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