Title : Selective induction of tissue inhibitor of metalloproteinase-1 in bleomycin-induced pulmonary fibrosis.

Pub. Date : 2001 May

PMID : 11350830






7 Functional Relationships(s)
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1 Selective induction of tissue inhibitor of metalloproteinase-1 in bleomycin-induced pulmonary fibrosis. Bleomycin tissue inhibitor of metalloproteinase 1 Mus musculus
2 We demonstrate that TIMP-1 messenger RNA (mRNA) and protein expression are selectively and markedly increased in a murine model of bleomycin-induced pulmonary fibrosis. Bleomycin tissue inhibitor of metalloproteinase 1 Mus musculus
3 Northern analysis showed that lung steady-state TIMP-1 mRNA levels increased 14-fold after bleomycin administration compared with control mice. Bleomycin tissue inhibitor of metalloproteinase 1 Mus musculus
4 Metalloproteinase inhibitory activity of relative molecular mass of ~ 21 to 28 kD, corresponding to the molecular weights for TIMP-1 and TIMP-2, was identified in lung extracts of bleomycin-injured mice by reverse zymography. Bleomycin tissue inhibitor of metalloproteinase 1 Mus musculus
5 Western analysis demonstrated that TIMP-1 protein levels in bronchoalveolar lavage fluid (BALF) of bleomycin-treated mice increased 220- and 151-fold at Days 4 and 28, respectively, compared with control mice. Bleomycin tissue inhibitor of metalloproteinase 1 Mus musculus
6 These results demonstrate that TIMP-1 gene expression is selectively increased, and that the expression of TIMP-1 and TIMP-2 is differentially regulated in bleomycin-induced pulmonary fibrosis. Bleomycin tissue inhibitor of metalloproteinase 1 Mus musculus
7 The profound and durable increase in TIMP-1 and TIMP-2 proteins suggests an important regulatory role for these antiproteases in the inflammatory and fibrotic responses to bleomycin-induced lung injury. Bleomycin tissue inhibitor of metalloproteinase 1 Mus musculus