title: Expression of the human neutrophil elastase gene: positive and negative transcriptional elements in the 5' flanking region.
abstract: The structure and position of cis-acting DNA sequences which regulate tissue specific expression of the human neutrophil elastase (HNE) gene have been investigated. We have identified a positive and a negative regulatory element upstream from the promoter region. The ability of these sequences to regulate transcription in myeloid and non-myeloid cells was studied by inserting varying lengths of HNE 5'-flanking sequence into a reporter plasmid containing the bacterial chloramphenicol acetyltransferase (CAT) gene. CAT activity in U937 was minimal in the absence of promoter and in the presence of HNE sequence to -102 bp. Inclusion of sequence up to -153 bp resulted in a 5.6-fold increase in CAT activity that was not observed in non-myeloid transfectants. Extension of the insert to include additional HNE sequence to -196 bp resulted in a decrease in CAT activity to control levels.
authors.affiliation: Laboratory of Medical Genetics, University of Alabama, Birmingham 35294.
authors.forename: J
authors.initials: J
authors.lastname: Han
authors.forename: T
authors.initials: T
authors.lastname: Unlap
authors.forename: T A
authors.initials: TA
authors.lastname: Rado
mesh_terms: D001483:Base Sequence; D002460:Cell Line; D015500:Chloramphenicol O-Acetyltransferase / Q000235:genetics / Q000378:metabolism; D002872:Chromosome Deletion; D015971:Gene Expression Regulation, Enzymologic; D005822:Genetic Vectors; D006801:Humans; D019272:Leukocyte Elastase; D008969:Molecular Sequence Data; D009838:Oligodeoxyribonucleotides; D010196:Pancreatic Elastase / Q000235:genetics*; D009195:Peroxidase / Q000235:genetics; D010957:Plasmids; D016133:Polymerase Chain Reaction / Q000379:methods; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D012045:Regulatory Sequences, Nucleic Acid; D012689:Sequence Homology, Nucleic Acid; D014158:Transcription, Genetic; D014162:Transfection
chemical_list: D009838:Oligodeoxyribonucleotides; D011993:Recombinant Fusion Proteins; D009195:Peroxidase; D015500:Chloramphenicol O-Acetyltransferase; D010196:Pancreatic Elastase; D019272:Leukocyte Elastase