Glomerular injury induced by cationic 70-kD staphylococcal protein; specific immune response is not involved in early phase in rats

The Journal of Pathology
Y FujigakiM Miyasaka

Abstract

A highly cationic staphylococal protein (designated p70, MW 70 kD, pI > 10) belongs to the groups of bacterial proteins that can bind immunoglobulin without specific antigen-antibody recognition; heparin inhibition tests indicated a charge interaction. This study evaluated the nephritogenicity of p70, which has affinity for the glomerular basement membrane (GBM), and the influence of various mediator systems on the induction of glomerulonephritis by p70. The left kidneys of intact rats, rats given cobra venom factor (complement-depleted), or rats given anti-adhesion molecules (ICAM-1 and LFA-1a) were perfused with p70. Proteinuria started within 24 h and persisted at day 5. Intraglomerular infiltration of cells was seen as early as 15 min, peaking at day 1. Deposits of rat IgG and C3 were seen in a subendothelial location 15 min after p70 perfusion in the left kidney and were found in a predominantly subepithelial location from 1 day onwards. Complement depletion and blockade of adhesion molecules suppressed proteinuria from day 2 onwards; these manipulations also prevented the recruitment of infiltrating cells and partially hindered the transfer of IgG across the GBM and the accumulation of IgG in the subepithelial region. In ...Continue Reading

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Citations

Nov 16, 2001·Annals of the Rheumatic Diseases·R H BronsJ W Tervaert
Nov 20, 2002·The Journal of Clinical Investigation·Lawrence Y LeeEric L Brown
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Jan 29, 2021·BMJ Case Reports·Rui Filipe NogueiraRui Alves

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