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Osteopontin: a rapid and sensitive response to dioxin exposure in the osteoblastic cell line UMR-106
Institute of Environmental Medicine, Karolinska Institutet.
2006 (English)In: Biochemical and Biophysical Research Communications - BBRC, ISSN 0006-291X, E-ISSN 1090-2104, Vol. 341, no 1, 116-120 p.Article in journal (Refereed) Published
Abstract [en]

2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is an endocrine disrupting environmental pollutant that, among other effects, affects bone tissue. TCDD modulates the transcription of various genes, e.g., CYP1A1, and the present study is a part of a project aiming at developing an in vitro model system for identifying biomarkers specific for dioxin-induced effects in osteoblasts. Osteopontin (OPN) is an adhesion protein, suggested to be important in bone remodeling and our results indicate that TCDD down-regulates the transcription of OPN in the osteoblastic cell line, UMR-106. The present study shows that UMR-106 expresses the AhR and that the expression of CYP1A1 is induced after exposure to TCDD, while down-regulation of OPN is an even more rapid response and a sensitive biomarker to TCDD exposure in this osteoblastic cell line. In conclusion, this osteoblastic cell line may be used as an in vitro model-system for studying dioxin-induced effects on osteoblasts.

Place, publisher, year, edition, pages
2006. Vol. 341, no 1, 116-120 p.
National Category
Basic Medicine
URN: urn:nbn:se:uu:diva-169563DOI: 10.1016/j.bbrc.2005.12.158PubMedID: 16414014OAI: oai:DiVA.org:uu-169563DiVA: diva2:507267
Available from: 2012-03-02 Created: 2012-03-02 Last updated: 2012-03-02Bibliographically approved

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