Studies with antibodies to cultured rat glomerular epithelial cells. Subepithelial immune deposit formation after in vivo injection

R. J. Quigg, D. R. Abrahamson, A. V. Cybulsky, John Badalamenti, A. W M Minto, D. J. Salant

Research output: Contribution to journalArticle

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Abstract

To investigate the role of glomerular epithelial cell (GEC) membrane proteins in the in situ formation of subepithelial immune deposits, the authors raised a rabbit antiserum against GEC that had been grown in culture (anti-GEC). By indirect immunofluorescence (IF) on normal rat kidney, anti-GEC stained proximal tubular brush border (BB). After intravenous injection into animals, granular glomerular capillary wall staining for IgG was present by IF and subepithelial immune deposits were identified by standard transmission and immunoelectron microscopy. Using the latter technique, injected anti-GEC IgG was identified beneath slit diaphragms and in endocytic-coated pits and intracellular vesicles of podocytes. Anti-GEC immunoprecipitated gp330 and two other proteins from radiolabeled BB. These proteins also were identified by sheep anti-rat Fx1A, the antiserum responsible for passive Heymann nephritis. Anti-GEC and anti-Fx1A also immunoprecipitated five identical proteins from surface-labeled GEC. Biosynthetically-labeled but not surface-labeled GEC contained immunoprecipitable gp330. Thus, injection into rats of antibodies raised against cultured GEC can produce subepithelial immune deposits, a disease process classically induced by antibodies to BB or its purified components. In addition to gp330, GEC and BB share other antigenic determinants that may contribute to the formation of these immune deposits.

Original languageEnglish (US)
Pages (from-to)1125-1133
Number of pages9
JournalAmerican Journal of Pathology
Volume134
Issue number5
StatePublished - 1989
Externally publishedYes

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Epithelial Cells
Injections
Antibodies
Microvilli
Immune Sera
Membrane Proteins
Immunoglobulin G
Podocytes
Membranous Glomerulonephritis
Immunoelectron Microscopy
Indirect Fluorescent Antibody Technique
Diaphragm
Intravenous Injections
Fluorescent Antibody Technique
Epitopes
Sheep
Proteins
Staining and Labeling
Rabbits
Kidney

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this

Studies with antibodies to cultured rat glomerular epithelial cells. Subepithelial immune deposit formation after in vivo injection. / Quigg, R. J.; Abrahamson, D. R.; Cybulsky, A. V.; Badalamenti, John; Minto, A. W M; Salant, D. J.

In: American Journal of Pathology, Vol. 134, No. 5, 1989, p. 1125-1133.

Research output: Contribution to journalArticle

Quigg, R. J. ; Abrahamson, D. R. ; Cybulsky, A. V. ; Badalamenti, John ; Minto, A. W M ; Salant, D. J. / Studies with antibodies to cultured rat glomerular epithelial cells. Subepithelial immune deposit formation after in vivo injection. In: American Journal of Pathology. 1989 ; Vol. 134, No. 5. pp. 1125-1133.
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