PMID- 9211354 OWN - NLM STAT- MEDLINE DCOM- 19970930 LR - 20190725 IS - 0085-2538 (Print) IS - 0085-2538 (Linking) VI - 52 IP - 1 DP - 1997 Jul TI - Identification of promoter activity and differential expression of transcripts encoding the murine stromelysin-1 gene in renal cells. PG - 120-9 AB - Stromelysin-1, matrix metalloproteinase-3 (MMP-3), is an important endopeptidase selectively expressed by somatic cells in organ tissues. The renal tubulointerstitium, for example, comprises tubular epithelium and interstitial fibroblasts forming the principal mass of the kidney. We observed that mRNA encoding stromelysin-1 is detectable in murine renal fibroblasts, but not in proximal tubular epithelium. Transcripts measured by RNase protection assay in renal fibroblasts increase following exposure to phorbol ester, and thereafter, activated stromelysin-1 protein can be detected in culture media by Western blotting. A 6.4 Kb genomic clone containing the putative stromelysin-1 promoter was isolated and a relevant 2.1 Kb PstI restriction fragment including 2.1 Kb of the immediate 5'-flanking region was sequenced on both strands. Two transcriptional start sites were identified by primer extension; the major start site corresponded to a previously established position in the rat promoter, and a second undescribed minor transcriptional start site was located 16 bp upstream of the primary site. A HiNF-A chromatin-activating element at -106 bp was found in the early promoter region of pR336 and an active AP-1 site at -72 bp with an Ets/PEA-3 motif at -203 bp was suggested by transient transfection of luciferase minigenes into renal fibroblasts responsive to phorbol ester. This Ets element was identical to a site in the early promoter of the fibroblast-specific gene FSP1. A baseline enhancement in activity of pR336 in fibroblasts was further observed with the addition of 5' flanking sequence out to -1980 bp. This additional region of flanking sequence contains two modular regions: one of multiple PEA-3 elements between -684 bp and -1955 bp and a second region between -1929 bp and -1980 bps containing a second AP-1 site at -1929 bp, a MBF-1/ MEP-1 metal binding site, and a PPAR peroxisome proliferator element at -1950 bp. Our findings implicate a gene structure with expected activity in a mesenchymal phenotype. The PKC-dependent regulation of the stromelysin-1 gene supports the notion that it may be modulated during inflammation or tissue remodeling. FAU - Yee, J AU - Yee J AD - Department of Medicine, University of Texas Health Science Center, San Antonio, USA. FAU - Kuncio, G S AU - Kuncio GS FAU - Bhandari, B AU - Bhandari B FAU - Shihab, F S AU - Shihab FS FAU - Neilson, E G AU - Neilson EG LA - eng GR - DK-07006/DK/NIDDK NIH HHS/United States GR - DK-30280/DK/NIDDK NIH HHS/United States GR - DK-45191/DK/NIDDK NIH HHS/United States GR - etc. PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Kidney Int JT - Kidney international JID - 0323470 RN - 0 (Culture Media, Conditioned) RN - 0 (RNA, Messenger) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) SB - IM MH - 3T3 Cells MH - Animals MH - Base Sequence MH - Blotting, Northern MH - Blotting, Southern MH - Cells, Cultured MH - Culture Media, Conditioned/chemistry MH - Gene Expression MH - Kidney/*metabolism MH - Matrix Metalloproteinase 3/biosynthesis/*genetics MH - Mice MH - Molecular Sequence Data MH - Promoter Regions, Genetic/*genetics MH - RNA, Messenger/analysis MH - Rats MH - Sequence Homology, Nucleic Acid MH - Transfection EDAT- 1997/07/01 00:00 MHDA- 1997/07/01 00:01 CRDT- 1997/07/01 00:00 PHST- 1997/07/01 00:00 [pubmed] PHST- 1997/07/01 00:01 [medline] PHST- 1997/07/01 00:00 [entrez] AID - S0085-2538(15)60151-X [pii] AID - 10.1038/ki.1997.311 [doi] PST - ppublish SO - Kidney Int. 1997 Jul;52(1):120-9. doi: 10.1038/ki.1997.311.