CHARACTERIZATION OF AN ENDOTHELIAL PROTEIN IN THE DEVELOPING RABBIT KIDNEY

被引:10
作者
KLOTH, S [1 ]
MEYER, D [1 ]
ROCKL, W [1 ]
MIETTINEN, A [1 ]
AIGNER, J [1 ]
SCHMIDBAUER, A [1 ]
MINUTH, WW [1 ]
机构
[1] UNIV HELSINKI,DEPT BACTERIOL & IMMUNOL,SF-00100 HELSINKI 10,FINLAND
关键词
ANGIOGENESIS; ENDOTHELIAL PROTEINS; KIDNEY DEVELOPMENT; MONOCLONAL ANTIBODY; RABBIT;
D O I
10.1111/j.1432-0436.1992.tb00502.x
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
A new protein (EnPo 1 antigen) abundant on endothelial cells and glomerular podocytes has been characterized by means of the mouse monoclonal antibody EnPo 1. Following electrophoretical separation of rabbit kidney homogenates EnPo 1 recognized a protein with a molecular weight of 110 kDa and an isoelectric point of 5.9 in Western blots. Using immunohistological techniques, the EnPo 1 antigen has been localized in high concentrations on glomerular podocytes of different developmental stages. Furthermore, the EnPo 1 antigen was expressed on endothelial cells of all adult rabbit organs tested so far. Detailed analysis of neonatal rabbit kidney revealed the abundance of EnPo 1 antigen on both differentiated vessels as well as on immature endothelial cells and endothelium of the microvasculature. Thus, for the first time a marker for in situ investigations of angiogenic processes within the mammalian kidney is available. Analysis of kidney cryosections by confocal laser scan microscopy revealed a direct connection between mature and differentiating vessels in the outer kidney cortex. Furthermore, two differentially organized cell populations discriminated by their EnPo 1 binding pattern were localized in the embryonic renal cortex. Morphologically, these cells were not distinguishable from other mesenchymal cells.
引用
收藏
页码:79 / 88
页数:10
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