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Matrix metalloproteinases and tissue inhibitors of matrix metalloproteinases in sputum from patients with bronchial asthma



Matrix metalloproteinases and tissue inhibitors of matrix metalloproteinases in sputum from patients with bronchial asthma



Journal of Asthma 38(6): 477-484



To examine a possibility that matrix metalloproteinases (MMPs) participate in the pathogenesis of asthma and/or the development of asthma attack, we measured the concentrations of MMP-2, MMP-9, and their respective tissue inhibitors of metalloproteinases (TIMP)-2 and TIMP-1, in induced sputa collected from 28 patients with moderate to severe bronchial asthma. Specimens were collected during both the attack and the remission from 15 age- and sex-matched healthy control subjects. The concentration of MMP-9 was significantly (p < 0.05) higher in the patients, even during the remission, as compared to that in healthy controls. The concentrations of MMP-9 (p < 0.05) and its specific inhibitor TIMP-1 (p < 0.01), and MMP-2 (p < 0.01) in these patients during the attack were significantly higher than those in healthy controls. In these patients, the MMP-9 concentration was significantly higher (p < 0.05) during the attack than during the remission. These results suggest that MMPs and TIMPs may be involved in the pathogenesis of bronchial asthma, and that the increased MMP-9 might be involved in the development of attack in patients with chronic asthma.

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Accession: 046631338

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PMID: 11642414


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