Proteomic analysis of endothelial cell autoantigens recognized by anti-dengue virus nonstructural protein 1 antibodies

Hsien Jen Cheng, Chiou Feng Lin, Huan Yao Lei, Hsiao Sheng Liu, Trai Ming Yeh, Yueh Hsia Luo, Yee Shin Lin

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

We previously showed the occurrence of autoimmune responses in dengue virus (DV) infection, which has potential implications for the pathogenesis of dengue hemorrhagic syndrome. In the present study, we have used a proteomic analysis to identify several candidate proteins on HMEC-1 endothelial cells recognized by anti-DV nonstructural protein 1 (NS1) antibodies. The target proteins, including ATP synthase β chain, protein disulfide isomerase, vimentin, and heat shock protein 60, co-localize with anti-NS1 binding sites on nonfixed HMEC-1 cells using immunohistochemical double staining and confocal microscopy. The cross-reactivity of anti-target protein antibodies with HMEC-1 cells was inhibited by NS1 protein preabsorption. Furthermore, a cross-reactive epitope on NS1 amino acid residues 311-330 (P311-330) was predicted using homologous sequence alignment. The reactivity of dengue hemorrhagic patient sera with HMEC-1 cells was blocked by synthetic peptide P311-330 pre-absorption. Taken together, our results identify putative targets on endothelial cells recognized by anti-DV NS1 antibodies, where NS1 P311-330 possesses the shared epitope.

Original languageEnglish
Pages (from-to)63-73
Number of pages11
JournalExperimental Biology and Medicine
Volume234
Issue number1
DOIs
Publication statusPublished - Jan 2009
Externally publishedYes

Keywords

  • Autoantibodies
  • Dengue virus
  • Endothelial cell autoantigens
  • Proteomic analysis

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Fingerprint Dive into the research topics of 'Proteomic analysis of endothelial cell autoantigens recognized by anti-dengue virus nonstructural protein 1 antibodies'. Together they form a unique fingerprint.

  • Cite this