Kuno A, Sato T, Shimazaki H, Unno S, Saitou K, Kiyohara K, Sogabe M, Tsuruno C, Takahama Y, Ikehara Y, Narimatsu H. Reconstruction of a robust glycodiagnostic agent supported by multiple lectin-assisted glycan profiling.
Proteomics Clin Appl 2013;
7:642-7. [PMID:
23640794 DOI:
10.1002/prca.201300010]
[Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 02/25/2013] [Indexed: 01/10/2023]
Abstract
PURPOSE
Wisteria floribunda agglutinin positive human Mac-2-binding protein (WFA(+)-hM2BP) was recently validated as a liver fibrosis glycobiomarker with a fully automated lectin-antibody sandwich immunoassay. In this study, we supplied recombinant WFA(+)-hM2BP as the standard glycoprotein and the overlaid antibody to enhance the robustness of WFA(+)-hM2BP quantification.
EXPERIMENTAL DESIGN
The optimum conditions for producing recombinant WFA(+)-hM2BP were selected by cell glycome analysis based on a lectin microarray. Interlot variability of recombinant WFA(+)-hM2BP was determined using an antibody-overlay lectin microarray. Screening of anti-M2BP mAb was completed by incorporating a WFA-antibody sandwich ELISA and an antibody-overlay lectin microarray.
RESULTS
The lectin microarray analysis revealed that human embryonic kidney 293 cells efficiently and stably produced WFA(+)-hM2BP in DMEM containing 10% FCS without any variation in the M2BP glycosylation level. A spiking experiment with recombinant WFA(+)-hM2BP was mostly effective for antibody screening. The reconstituted sandwich immunoassay was useful for the continuous quantification and cutoff index expression of serum WFA(+)-hM2BP.
CONCLUSIONS AND CLINICAL RELEVANCE
The multiple use of lectin-assisted glycan profiling enabled us to construct a reliable sandwich assay kit for monitoring liver fibrosis in patients with viral hepatitis. This will assist in the development pipeline for other glycodiagnostic agents.
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