Abstract
Synthesis of erythropoietin, the primary humoral regulator of erythropoiesis, in liver and kidney is inducible by anemia or hypoxia. Analysis of human erythropoietin gene expression in transgenic mice revealed that sequences located 6-14 kilobases 5' to the gene direct expression to the kidney, whereas sequences within the immediate 3'-flanking region control hepatocyte-specific expression. Human erythropoietin transcription initiation sites were differentially utilized in liver and kidney. Inducible transgene expression was precisely targeted to peritubular interstitial cells in the renal cortex that synthesize endogenous mouse erythropoietin. These studies demonstrate that multiple erythropoietin gene regulatory elements control cell-type-specific expression and inducibility by a fundamental physiologic stimulus, hypoxia.
MeSH Terms
Anemia/genetics
Animals
Base Sequence
Blotting, Northern
Erythropoietin/genetics
Gene Expression Regulation
Genes
Humans
Hypoxia/genetics
Kidney/physiology
Liver/physiology
Mice
Mice, Transgenic
Molecular Sequence Data
Nucleic Acid Hybridization
RNA, Messenger/genetics
Regulatory Sequences, Nucleic Acid
Restriction Mapping
Transcription, Genetic
Chemicals
RNA, Messenger
Erythropoietin
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Semenza G L
Department of Pediatrics and Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205.
Koury S T
Nejfelt M K
Gearhart J D
Antonarakis S E
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