Suspicion of autoimmune encephalitis/autoimmune cerebellar ataxia.
Indirect immunofluorescence.
Reported as positive (with titre) or negative.
Metabotropic glutamate receptors are transmembrane proteins in neuronal membranes. Unlike ionotropic receptors, metabotropic glutamate receptors (mGluRs) are not ion channels. Instead, they activate biochemical cascades, leading to the modification of other proteins, as for example ion channels.
Antibodies against mGluR1 (metabotropic glutamate receptor 1) have been described for Morbus Hodgkin together with (paraneoplastic) cerebellar ataxia.
It is recommended to use the test on serum. It has not been reported cases of only CSF positive.
PMID: 24637228, 25081016
