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Cathepsin K Contributes to Cavitation and Collagen Turnover in Pulmonary Tuberculosis
Umeå University, Faculty of Science and Technology, Department of Molecular Biology (Faculty of Science and Technology).
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2016 (English)In: Journal of Infectious Diseases, ISSN 0022-1899, E-ISSN 1537-6613, Vol. 213, no 4, p. 618-627Article in journal (Refereed) Published
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Abstract [en]

Cavitation in tuberculosis enables highly efficient person-to-person aerosol transmission. We performed transcriptomics in the rabbit cavitary tuberculosis model. Among 17 318 transcripts, we identified 22 upregulated proteases. Five type I collagenases were overrepresented: cathepsin K (CTSK), mast cell chymase-1 (CMA1), matrix metalloproteinase 1 (MMP-1), MMP-13, and MMP-14. Studies of collagen turnover markers, specifically, collagen type I C-terminal propeptide (CICP), urinary deoxypyridinoline (DPD), and urinary helical peptide, revealed that cavitation in tuberculosis leads to both type I collagen destruction and synthesis and that proteases other than MMP-1, MMP-13, and MMP-14 are involved, suggesting a key role for CTSK. We confirmed the importance of CTSK upregulation in human lung specimens, using immunohistochemical analysis, which revealed perigranulomatous staining for CTSK, and we showed that CTSK levels were increased in the serum of patients with tuberculosis, compared with those in controls (3.3 vs 0.3 ng/mL; P = .005).

Place, publisher, year, edition, pages
Oxford University Press, 2016. Vol. 213, no 4, p. 618-627
Keyword [en]
tuberculosis, cathepsin K, rabbit, collagen, collagenolysis, RNAseq
National Category
Microbiology Immunology
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URN: urn:nbn:se:umu:diva-119672DOI: 10.1093/infdis/jiv458ISI: 000372437700019PubMedID: 26416658OAI: oai:DiVA.org:umu-119672DiVA, id: diva2:923047
Available from: 2016-04-25 Created: 2016-04-25 Last updated: 2018-03-16Bibliographically approved

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CiteExportLink to record
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