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The autoimmune role of anti-GM1 is still unclear. Multifocal motor neuropathy (MMN) with conduction block is closely related to CIDP (chronic inflammatory demyelinating polyneuropathy). Anti-GM1 antibodies are positive in around 80% of cases.
Antibodies to GM1 are increased in Guillain–Barré syndrome, dementia and lupus but their function is not clear. [4] There is some evidence to suggest antibodies against GM1 are associated with diarrhea in Guillain–Barré syndrome. [5] GM1 antibodies are also seen in Multifocal Motor Neuropathy (MMN), a rare antibody-mediated inflammatory ...
The GM1 gangliosidoses, usually shortened to GM1, are gangliosidoses caused by mutation in the GLB1 gene resulting in a deficiency of beta-galactosidase.The deficiency causes abnormal storage of acidic lipid materials in cells of the central and peripheral nervous systems, but particularly in the nerve cells, resulting in progressive neurodegeneration.
Antibodies may be directed against "GM-1", a ganglioside found at the Nodes of Ranvier. These antibodies have been detected in at least one-third of MMN patients. More recent studies also suggest that newer tests for antibodies directed against GM-1, as well as a number of related gangliosides, are positive in over 80% of MMN patients.
Antibody testing, such as anti-Hu or collapsing response mediator protein, can aid in the identification of paraneoplastic patients. [ 1 ] One should rule out Guillain-Barré syndrome if the patient exhibits acute or subacute autonomic instability accompanied by weakness , as this condition frequently results in ileus , constipation , and blood ...
Structure of GM1 ganglioside. A ganglioside is a molecule composed of a glycosphingolipid (ceramide and oligosaccharide) with one or more sialic acids (e.g. N-acetylneuraminic acid, NANA) linked on the sugar chain.
The clinical features and course of the condition, the associated auto-antibodies against relevant antigens, and the response to treatment, all suggest that Bickerstaff brainstem encephalitis is an autoimmune disease. However, each of these criteria fails to fit a substantial proportion of patients, and there is no single test or feature which ...
Antibodies attack the coating of the motor neurons without causing inflammation or loss of myelin. It does not affect sensory neurons, so sensation remains intact despite loss of movement. It does not affect sensory neurons, so sensation remains intact despite loss of movement.