Immunohistological localization of the novel epitope related to type IV collagen in normal and diseased renal tissues

K. Hirata, Kenichi Shikata, Hirofumi Makino, T. Hayashi, Z. Ota

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Type IV collagen is a major component of the renal glomerular extracellular matrix. A recently characterized monoclonal antibody, JK132, which was originally produced by immunization with human placental type IV collagen, recognizes a new epitope which is different from α1-α6 chains of type IV collagen. Using immunofluorescence and immunogold electron microscopy, the distribution of the epitope of JKI32 has been compared with the distribution of α1, α2, α3 and α4 chains of type IV collagen in normal human kidney and in the renal tissues of patients with various types of glomerulonephritis. In normal human kidney, JK132 reacted with mesangial matrix, Bowman's capsular basement membrane (BCBM), tubular basement membrane, and vessel walls, but did not react with glomerular basement membrane (GEM). This distribution is different from the distribution of α1-α4(IV) chains. In IgA nephropathy and membranoproliferative glomerulonephritis, the staining intensity for JK132 was increased in expanded mesangial matrix. In glomeruli with severe mesangial proliferation, the epitope of JK132 extended to the endothelial side of the GEM. In membranous nephropathy, staining for JK132 was virtually unchanged from normal. This study suggests that the epitope of JK132 increases in amount during the process of mesangial proliferation and could serve as a marker for mesangial matrix expansion in glomerulonephritis.

Original languageEnglish
Pages (from-to)407-413
Number of pages7
JournalJournal of Pathology
Volume177
Issue number4
DOIs
Publication statusPublished - 1995

Fingerprint

Collagen Type IV
Epitopes
Kidney
Glomerular Basement Membrane
Glomerulonephritis
Basement Membrane
Staining and Labeling
Membranoproliferative Glomerulonephritis
Membranous Glomerulonephritis
Immunoglobulin A
Fluorescent Antibody Technique
Extracellular Matrix
Immunization
Electron Microscopy
Monoclonal Antibodies

Keywords

  • Glomerulonephritis
  • JK132
  • Kidney
  • Type IV collagen

ASJC Scopus subject areas

  • Pathology and Forensic Medicine

Cite this

Immunohistological localization of the novel epitope related to type IV collagen in normal and diseased renal tissues. / Hirata, K.; Shikata, Kenichi; Makino, Hirofumi; Hayashi, T.; Ota, Z.

In: Journal of Pathology, Vol. 177, No. 4, 1995, p. 407-413.

Research output: Contribution to journalArticle

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