Upregulated expression of activation-induced cytidine deaminase in ocular adnexal marginal zone lymphoma with igg4-positive cells

Asami Nishikori, Yoshito Nishimura, Rei Shibata, Koh Ichi Ohshima, Yuka Gion, Tomoka Ikeda, Midori Filiz Nishimura, Tadashi Yoshino, Yasuharu Sato

Research output: Contribution to journalArticlepeer-review

Abstract

Immunoglobulin G4-related disease (IgG4-RD) is a systemic disorder characterized by tissue fibrosis and intense lymphoplasmacytic infiltration, causing progressive organ dysfunction. Activation-induced cytidine deaminase (AID), a deaminase normally expressed in activated B-cells in germinal centers, edits ribonucleotides to induce somatic hypermutation and class switching of immunoglobulin. While AID expression is strictly controlled under physiological conditions, chronic inflammation has been noted to induce its upregulation to propel oncogenesis. We examined AID expression in IgG4-related ophthalmic disease (IgG4-ROD; n = 16), marginal zone lymphoma with IgG4-positive cells (IgG4+ MZL; n = 11), and marginal zone lymphoma without IgG4-positive cells (IgG4-MZL; n = 12) of ocular adnexa using immunohistochemical staining. Immunohistochemistry revealed significantly higher AID-intensity index in IgG4-ROD and IgG4+ MZL than IgG4-MZL (p < 0.001 and = 0.001, respectively). The present results suggest that IgG4-RD has several specific causes of AID up-regulation in addition to inflammation, and AID may be a driver of oncogenesis in IgG4-ROD to IgG4+ MZL.

Original languageEnglish
Article number4083
JournalInternational journal of molecular sciences
Volume22
Issue number8
DOIs
Publication statusPublished - Apr 2 2021

Keywords

  • Activation-induced cytidine deaminase
  • IgG4-positive marginal zone lymphoma
  • IgG4-related disease

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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