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Virchows Archiv B

, 48:107 | Cite as

Ultramicroscopic localization of cationized antigen in the glomerular basement membrane in the course of active, in situ immune complex glomerulonephritis

  • Takashi Oite
  • Fujio Shimizu
  • Yasuhito Suzuki
  • Arnold Vogt
Article

Summary

The sequence of antigen localization and the interaction of immune deposits with the anionic sites of the glomerular basement membrane (GBM) were investigated in an active model of in situ immune complex glomerulonephritis using a cationized ferritin.

Three weeks after immunization with native horse spleen ferritin, the left kidneys of rats were perfused with 500 μg of cationized ferritin through the left renal artery. One h after renal perfusion, most of ferritin particles localized subendothelially, corresponding to the anionic sites of the lamina rara interna. In the glomerular capillary loops, infiltrating polymorphonuclear leukocytes and monocytes were seen. Some of these monocytes were in direct contact with immune complexes containing ferritin aggregates associated with anionic sites of the lamina rara interna. At 24 h, numerous ferritin aggregates were present subepithelially, preferentially beneath the slit membrane. The subepithelial location of ferritin did not always correspond to the anionic sites of the lamina rara externa.

From days 3 to 7, there was remarkable endocapillary cell proliferation in some loops and pronounced effacement of epithelial foot processes. Focal detachment of epithelium from the GBM was observed occasionally. From days 14 to 28, most of ferritin aggregates were located intramembranously and subepithelially. Membranous transformation has already begun around the subepithelial deposits. This morphological study provides insight into the fate of immune deposits and injury to the GBM in the glomerulonephritis.

Key words

Immune complex glomerulonephritis Active model Cationized ferritin Anionic sites 

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Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Takashi Oite
    • 1
  • Fujio Shimizu
    • 1
  • Yasuhito Suzuki
    • 2
  • Arnold Vogt
    • 3
  1. 1.The Department of Immunology of the Institute of NephrologyNiigata University School of MedicineNiigata City 951, NiigataJapan
  2. 2.The 2nd Department of MedicineNiigata University School of MedicineJapan
  3. 3.The Institute of ImmunologyZentrum für Hygiene der Universität FreiburgJapan

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