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IDENTIFICATION OF THE RENAL ERYTHROPOIETIN-PRODUCING CELLS USING TRANSGENIC MICE.
1149 - 1162.
Regulation of erythropoietin production by the kidneys is central to the control of erythropoiesis. Uncertainty about the identity of the renal cells involved has been a major obstacle to understanding this mechanism. We have used sequence from the mouse erythropoietin locus to direct expression of a marker gene, SV40 T antigen, to these cells in transgenic mice. The transgenic constructs contained an oligonucleotide marker (Epo-M) or SV40 sequence (Epo-TAg) in the 5' untranslated region of the mouse erythropoietin gene, flanked on each side by 9 and 7.5 kb of DNA from the mouse erythropoietin locus. Anemia-inducible expression of Epo-M and Epo-TAg was observed in the kidney. In one of thirteen lines, homologous integration of Epo-TAg into the mouse erythropoietin locus occurred. In transgenic mice bearing Epo-TAg at homologous and heterologous insertion sites, renal expression was restricted to a population of cells in the interstitium of the cortex and outer medulla. Immunohistochemical characterization by light and electron microscopy shows that these are the fibroblast-like type I interstitial cells.
|Title:||IDENTIFICATION OF THE RENAL ERYTHROPOIETIN-PRODUCING CELLS USING TRANSGENIC MICE|
|Keywords:||INSITU HYBRIDIZATION, MESSENGER-RNA, HOMOLOGOUS RECOMBINATION, MONOCLONAL-ANTIBODY, ENHANCER ELEMENT, RAT-KIDNEY, GENE, EXPRESSION, HYPOXIA, LOCALIZATION|
|UCL classification:||UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Medicine (Division of)|
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