title: High Throughput ELISAs to Measure a Unique Glycan on Transferrin in Cerebrospinal Fluid: A Possible Extension toward Alzheimer's Disease Biomarker Development.
abstract: We have established high-throughput lectin-antibody ELISAs to measure different glycans on transferrin (Tf) in cerebrospinal fluid (CSF) using lectins and an anti-transferrin antibody (TfAb). Lectin blot and precipitation analysis of CSF revealed that PVL (Psathyrella velutina lectin) bound an unique N-acetylglucosamine-terminated N-glycans on "CSF-type" Tf whereas SSA (Sambucus sieboldiana agglutinin) bound α2,6-N-acetylneuraminic acid-terminated N-glycans on "serum-type" Tf. PVL-TfAb ELISA of 0.5 μL CSF samples detected "CSF-type" Tf but not "serum-type" Tf whereas SSA-TfAb ELISA detected "serum-type" Tf but not "CSF-type" Tf, demonstrating the specificity of the lectin-TfAb ELISAs. In idiopathic normal pressure hydrocephalus (iNPH), a senile dementia associated with ventriculomegaly, amounts of the SSA-reactive Tf were significantly higher than in non-iNPH patients, indicating that Tf glycan analysis by the high-throughput lectin-TfAb ELISAs could become practical diagnostic tools for iNPH. The lectin-antibody ELISAs of CSF proteins might be useful for diagnosis of the other neurological diseases.
authors.affiliation: Department of Biochemistry, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima 960-1295, Japan.
authors.forename: Keiro
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authors.lastname: Shirotani
authors.forename: Satoshi
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authors.lastname: Futakawa
authors.forename: Kiyomitsu
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authors.lastname: Hoshi
authors.forename: Toshie
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authors.lastname: Saito
authors.forename: Yuriko
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authors.forename: Tatsuhiko
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authors.lastname: Yuasa
authors.forename: Masakazu
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authors.forename: Hajime
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authors.forename: Atsushi
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authors.lastname: Kuno
authors.forename: Hisashi
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authors.lastname: Narimatsu
authors.forename: Yasuhiro
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authors.lastname: Hashimoto