BP180 ELISA using bacterial recombinant NC16a protein as a diagnostic and monitoring tool for bullous pemphigoid

Masakazu Kobayashi, Masayuki Amagai, Keiko Kuroda-Kinoshita, Takashi Hashimoto, Yuji Shirakata, Koji Hashimoto, Takeji Nishikawa

Research output: Contribution to journalArticlepeer-review

166 Citations (Scopus)

Abstract

Bullous pemphigoid (BP) is an acquired autoimmune subepidermal blistering disease against hemidesmosomal cytoplasmic BP230 and transmembrane BP180 proteins. Epitope mapping studies have shown that the membrane-proximal noncollagenous (NC) 16a domain of BP180 harbors clusters of antigenic sites recognized by the vast majority of BP sera. In this study, we developed an enzyme-linked immunosorbent assay (ELISA) using bacterial recombinant NC16a protein and evaluated its clinical benefit for diagnosis and monitoring disease activity. Fifty four (84.4%) of 64 sera from BP patients were positive, while only one (1.1%) of 91 sera from collagen disease patients and five (1.5%) of 336 sera from normal control barely exceeded the cut-off value. None of 69 pemphigus vulgaris sera and none of 42 pemphigus foliaceus sera exceeded the cut-off value. Thus, the sensitivity and specificity of NC16a ELISA were 84.4 and 98.9%, respectively. The correlation between ELISA scores and disease activity along the time course was examined using seven BP patients. NC16a ELISA scores tended to fluctuate in parallel with the disease activity along the time course and reflected the disease activity much better than indirect immunofluorescence. These findings indicate that NC16a ELISA will be a valuable tool not only for the diagnosis of patients with BP but also for the monitoring of the disease activity.

Original languageEnglish
Pages (from-to)224-232
Number of pages9
JournalJournal of Dermatological Science
Volume30
Issue number3
DOIs
Publication statusPublished - 2002 Dec

Keywords

  • Autoantibody
  • Autoimmunity
  • Collagen
  • Hemidesmosome

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Dermatology

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