IgA nephropathy with poorly developed lymphoepithelial symbiosis of the palatine tonsils?

Yoko Sato, Osamu Hotta, Yoshio Taguma, Tomonori Takasaka, Masato Nose

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


Tonsillar abnormalities have been observed in patients with IgA nephropathy (IgAN). In addition, it has been suggested that reticulization of tonsillar crypt epithelium is important in tonsillar immunity. Therefore, we investigated reticulization of this area in patients with IgAN (14 cases) and compared results with those of control patients who exhibited recurrent tonsillitis or tonsillar hypertrophy (12 cases). Immunohistochemical staining of antikeratin antibody PKK1 was employed to visualize reticulization. Tonsils of controls showed well developed reticular crypt epithelia with lymphoepithelial symbiosis and the nonreticulated area was less than 7% of the total crypt epithelia per overall section. In IgAN tonsils, however, nonreticulated crypt epithelium was frequently observed and, in the advanced stage of IgAN, exceeded 50% of total crypt epithelia. The extent of glomerular damage in IgAN patients correlated significantly with the percentage of the area of nonreticulated crypt in palatine tonsils with a correlation coefficient of 0.91. Considered together with our finding that PKK1 -positive epithelial reticular cells strongly expressed HLA-DR antigens in normal tonsils, the low level of reticulization in IgAN patients may induce the unusual immunity responsible for the pathogenesis of IgAN.

Original languageEnglish
Pages (from-to)301-308
Number of pages8
Issue number2
Publication statusPublished - 1996
Externally publishedYes


  • Epithelial reticular cell
  • HLA-DR
  • IgA nephropathy
  • Lymphoepithelial symbiosis
  • Palatine tonsils
  • Renal biopsy
  • Tonsillar crypt epithelium

ASJC Scopus subject areas

  • Physiology
  • Nephrology
  • Physiology (medical)
  • Urology


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