Abstract:
:Highly reliable biomarkers for the diagnosis of neurological diseases are not widely available. Here we evaluated a luciferase immunoprecipitation technology (LIPS) for the diagnosis of a CNS autoimmune disorder, stiff-person syndrome (SPS). Analysis by LIPS of 40 sera samples from SPS and control subjects for anti-GAD65 antibodies revealed dramatic titer differences allowing diagnosis of SPS with 100% sensitivity and 100% specificity. Anti-GAD65 antibody titers of SPS were segregated from controls with values greater than 23 standard deviations above the control subject mean. By analyzing patient antibody responses directly to GAD65 sub-fragments, the central region containing the decarboxylase catalytic domain was highly immunoreactive with all of the SPS sera, while the N- and C-terminal regions showed lower antibody titers and only reacted with subsets of SPS sera. Additional profiling revealed that some SPS patients showed autoantibodies against GAD67 and tyrosine hydroxylase, but no significant immunoreactivity was detected with cysteine sulfinic acid decarboxylase or GABA transaminase. This study validates LIPS as a robust method to interrogate autoantibodies for the diagnosis of SPS and potentially other neurological diseases.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Burbelo PD,Groot S,Dalakas MC,Iadarola MJdoi
10.1016/j.bbrc.2007.11.077subject
Has Abstractpub_date
2008-02-01 00:00:00pages
1-7issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(07)02397-2journal_volume
366pub_type
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journal_title:Biochemical and biophysical research communications
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