A novel immunochromatographic strips assay for rapid and simple detection of systemic lupus erythematosus

Sci Rep. 2020 Aug 25;10(1):14178. doi: 10.1038/s41598-020-71137-0.

Abstract

Systemic lupus erythematosus (SLE) is a complex multi-system autoimmune disease. Detection of anti-nuclear antibodies (ANA) is fundamental for the diagnosis of SLE. In the present study, we found that the level of core fucosylation catalyzed by α1,6-fucosyltransferase (Fut8) is markedly up-regulated on immunoglobulin G (IgG) in the sera of SLE patients detected by Aspergillus oryzae lectin (AOL) blot. In sandwich Dot enzyme-linked immunosorbent assay (Dot-ELISA), the core fucosylation level was also found significantly increased in the sera from SLE patients with a higher ANA titer. To establish a rapid and sensitive laboratory test for the diagnosis of SLE, we prokaryotically expressed AOL and C3-D1-C3-D2-C3 of protein G (SpG3), and generate AOL-conjugated colloid gold immunochromatographic strips (ICS). The detection limit of core fucosylated IgG was 10 μg/mL for AOL-conjugated colloid gold ICS. As well as indirect immunofluorescence, the AOL-conjugated colloid gold ICS showed reliable results in the serum of 39 SLE patients. Our results indicated that the AOL-conjugated colloid gold ICS could serve as a rapid test for the detection of ANA and suspected cases of SLE.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Animals
  • Antibodies, Antinuclear / blood
  • Aspergillus oryzae
  • Bacterial Proteins / chemistry
  • Bacterial Proteins / genetics
  • Biomarkers
  • Chromatography, Affinity*
  • Enzyme-Linked Immunosorbent Assay
  • Female
  • Fluorescent Antibody Technique, Indirect
  • Fucose / metabolism
  • Fucosyltransferases / deficiency
  • Fucosyltransferases / metabolism
  • Glycosylation
  • Gold Colloid
  • Humans
  • Immunoblotting
  • Immunoglobulin G / blood
  • Immunoglobulin G / chemistry*
  • Lupus Erythematosus, Systemic / blood
  • Lupus Erythematosus, Systemic / diagnosis*
  • Male
  • Mice, Knockout
  • Middle Aged
  • Plant Lectins
  • Protein Processing, Post-Translational
  • Reagent Strips*
  • Recombinant Fusion Proteins
  • Specific Pathogen-Free Organisms
  • Young Adult

Substances

  • Antibodies, Antinuclear
  • Bacterial Proteins
  • Biomarkers
  • Gold Colloid
  • IgG Fc-binding protein, Streptococcus
  • Immunoglobulin G
  • Plant Lectins
  • Reagent Strips
  • Recombinant Fusion Proteins
  • Fucose
  • Fucosyltransferases
  • Glycoprotein 6-alpha-L-fucosyltransferase