Transient expression of type I collagen in glomeruli with anti-Thy-1 antibody-induced mesangial proliferative lesions.
Glomerular expression of extracellular matrices at the protein and mRNA levels was examined in rats with mesangial proliferative glomerulonephritis induced by the intravenous administration of a monoclonal anti-rat Thy-1 antibody. In close association with the mesangial proliferative lesion, type I collagen was immunostained at day 8 but not demonstrated at day 28 in the glomeruli of the kidneys. Type I collagen mRNA expression prominently increased in the nephritic glomeruli at day 4, prior to the appearance of type I collagen protein. In addition, fibronectin expression was also elevated in the diseased glomeruli at both the protein and mRNA levels. These results indicated that glomerular, probably mesangial cells, change their phenotypes during this disease, to synthesize abnormal extracellular matrices that lead to the progression of glomerular sclerosis.
Yagi
M
M
Pharmaceutical Research Laboratory, Kirin Brewery Co., Ltd, Takasaki, Japan.
Yamamoto
T
T
Nagano
N
N
Kato
S
S
Kusaka
M
M
Kawasaki
K
K
Yaoita
E
E
Kihara
I
I
D000818:Animals; D001806:Blood Urea Nitrogen; D003094:Collagen / Q000378:metabolism*; D016326:Extracellular Matrix Proteins / Q000235:genetics; D005260:Female; D019084:Fluorescent Antibody Technique, Indirect; D015432:Glomerulonephritis, Membranoproliferative / Q000209:etiology / Q000276:immunology / Q000473:pathology*; D007518:Isoantibodies / Q000276:immunology*; D007678:Kidney Glomerulus / Q000737:chemistry / Q000276:immunology / Q000473:pathology*; D008856:Microscopy, Fluorescence; D051381:Rats; D011917:Rats, Inbred Lew; D013601:T-Lymphocytes / Q000276:immunology
D016326:Extracellular Matrix Proteins; D007518:Isoantibodies; C035678:anti-Thy antibody; D003094:Collagen