Detailed analysis of phenotypes of macrophages infiltrating glomeruli in rat anti-Thy1 nephritis.
A phenotypic analysis of infiltrating macrophages in rat anti-Thy1 glomerulonephritis induced by monoclonal antibody (mAb) 1-22-3 was carried out using recently reported macrophage-specific mAbs. This was combined with a more detailed quantitative analysis, counting positive cells in isolated glomeruli, to obtain more information on the roles played by macrophages in glomerulonephritis. In normal glomeruli a small number of ED1- or OX-3(anti-Ia)-positive cells but almost no ED2-, TRPM-3- or Mar-3-positive cells were observed. ED1-positive cells increased from 2 h and peaked between days 3 and 7 after mAb injection. TRPM-3-positive cells increased from day 3 and peaked on day 7, later than ED1. The numbers of OX-3-positive cells changed in parallel with those of ED1-positive cells. Mar-3, which stained blood monocytes and ED2, which is an indicator oftissue-fixed resident macrophages, did not react with glomerular infiltrating macrophages. In a double staining study, about 40% of ED1- or OX-3-positive cells costained with TRPM-3 on day 3 and the percentage increased on day 7, but hardly any cells were positive for TRPM-3 alone. This results in two different phenotypes (ED1+,ED2-,OX-3+,Mar-3-, TRPM-3- and ED1+,ED2-,OX-3+,Mar-3-,TRPM-3+) of infiltrating macrophages. We conclude that in rat anti-Thy1 glomerulonephritis, monocytes/macrophages may infiltrate the mesangium, rapidly changing their phenotype (Mar-3+ to Mar-3-) and resulting in a gradual shift to TRPM-3-positive, activated macrophages.
Kobayashi
H
H
Department of Cell Biology, Institute of Nephrology, Niigata University School of Medicine, Japan.
Orikasa
M
M
Naito
M
M
Kawasaki
K
K
Oite
T
T
Kawachi
H
H
Yamashita
A
A
Takeya
M
M
Nihei
H
H
Shimizu
F
F
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D043182:Carboxylesterase; D002265:Carboxylic Ester Hydrolases / Q000378:metabolism; D005260:Female; D005455:Fluorescent Antibody Technique; D005921:Glomerulonephritis / Q000276:immunology*; D007150:Immunohistochemistry; D007518:Isoantibodies / Q000276:immunology*; D007678:Kidney Glomerulus / Q000276:immunology*; D008262:Macrophage Activation; D008264:Macrophages / Q000145:classification / Q000276:immunology* / Q000648:ultrastructure; D010641:Phenotype; D051381:Rats; D017208:Rats, Wistar
D000911:Antibodies, Monoclonal; D007518:Isoantibodies; C035678:anti-Thy antibody; D002265:Carboxylic Ester Hydrolases; D043182:Carboxylesterase