Protein gene product 9.5 is selectively localized in parietal epithelial cells of Bowman's capsule in the rat kidney.
Parietal epithelial cells (PEC) of Bowman's capsules cover the inner aspect of Bowman's capsules and are believed to contribute to extracapillary lesions of glomerulonephritis such as crescent formation. In glomerular research including cell culture experiments and pathology, differentiation between PEC and podocytes has frequently been a major problem. Immunohistochemistry of the adult rat kidney for protein gene product 9.5 (PGP 9.5), a neuron-specific ubiquitin C-terminal hydrolase, demonstrated selective localization of the immunoreactivity in PEC. At the urinary pole of the glomerulus, immunoreactive PEC were clearly differentiated from proximal tubular cells that were negative for PGP 9.5. In the subcapsular nephrogenic zone of newborn rat kidney, immunoreactivity was observed in almost all cells in the commashaped body and early S-shaped body and selectively in PEC in the late S-shaped body and capillary-stage glomerulus. In rat glomerular disease models (Masugi-nephritis and puromycin aminonucleoside nephrosis), cells that consisted of cellular crescents or adhered to glomerular tufts were positive for PGP 9.5. The selective localization of PGP 9.5 in PEC in rat kidney provides a new cytochemical marker for identifying the cells. Development expression of the protein suggests that PGP 9. 5 is involved in the processes of nephrogenesis of rat kidney.
Shirato
Isao
I
Division of Nephrology, Department of Medicine, Juntendo University School of Medicine, Tokyo, Japan.
Asanuma
Katsuhiko
K
Division of Nephrology, Department of Medicine, Juntendo University School of Medicine, Tokyo, Japan.
Takeda
Yukihiko
Y
Division of Nephrology, Department of Medicine, Juntendo University School of Medicine, Tokyo, Japan.
Hayashi
Kayo
K
Division of Nephrology, Department of Medicine, Juntendo University School of Medicine, Tokyo, Japan.
Tomino
Yasuhiko
Y
Division of Nephrology, Department of Medicine, Juntendo University School of Medicine, Tokyo, Japan.
D000375:Aging / Q000378:metabolism; D000818:Animals; D000831:Animals, Newborn / Q000378:metabolism; D000911:Antibodies, Monoclonal; D004847:Epithelial Cells / Q000378:metabolism; D007150:Immunohistochemistry / Q000379:methods; D007668:Kidney / Q000378:metabolism* / Q000473:pathology; D008297:Male; D009393:Nephritis / Q000378:metabolism / Q000473:pathology; D009401:Nephrosis / Q000378:metabolism / Q000473:pathology; D051381:Rats; D011921:Rats, Inbred WKY; D017207:Rats, Sprague-Dawley; D013869:Thiolester Hydrolases / Q000378:metabolism*; D014018:Tissue Distribution; D043222:Ubiquitin Thiolesterase
D000911:Antibodies, Monoclonal; D013869:Thiolester Hydrolases; D043222:Ubiquitin Thiolesterase