6533b7d9fe1ef96bd126ce26
RESEARCH PRODUCT
Tissue inhibitor of metalloproteinases-2 (TIMP-2) in rat liver cells is increased by lipopolysaccharide and prostaglandin E2
Stefan Rose-johnSiegfried MaternLutz GraeveElke RoebPeter C. HeinrichAndrea ErrenDylan R. Edwardssubject
Lipopolysaccharidesmedicine.medical_specialtyLipopolysaccharidemedicine.medical_treatmentInflammatory mediatorIntraperitoneal injectionBiophysicsTissue inhibitor of metalloproteinaseMatrix metalloproteinaseBiochemistryDexamethasoneDinoprostoneCell LineProinflammatory cytokineMicechemistry.chemical_compoundStructural BiologyFibrosisIn vivoInternal medicineGeneticsmedicineAnimalsHumansRNA MessengerProstaglandin E2Molecular BiologyCells CulturedTissue Inhibitor of Metalloproteinase-2ChemistryMetalloendopeptidasesProteinsExtracellular matrixCell BiologyTissue inhibitor of metalloproteinasemedicine.diseaseFibrosisRatsEndocrinologyGene Expression RegulationLiverProtein BiosynthesisCytokinesRat hepatocytemedicine.drugdescription
AbstractTo explore the functional role of TIMP-2 in liver, we determined TIMP-2 mRNA levels in primary rat hepatocytes and in total rat liver. Rat hepatocytes constitutively express TIMP-2 mRNA at a low level. Incubation with dexamethasone, prostaglandin E2 and a combination of inflammatory cytokines leads to an up-regulation of TIMP-2 mRNA. In rats in vivo we found a dramatic increase of TIMP-2 expression after intraperitoneal injection of lipopolysaccharide. Compared to our previous findings on TIMP-1 we conclude that TIMP-2 mRNA expression is regulated in a distinct and partially opposite manner. Over-production of TIMP-2 could inhibit the activity of metalloproteinases and thus lead to matrix accumulation. Dysregulation of TIMP-2 synthesis might be involved in the development of liver fibrosis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1995-01-02 |