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Gene expression profiles in rat liver treated with perfluorooctanoic acid (PFOA)
Toxico-Biochemistry Section, National Institute of Animal Health, Kannondai 3-1-5, Tsukuba, Ibaraki, Japan.
Toxico-Biochemistry Section, National Institute of Animal Health, Kannondai 3-1-5, Tsukuba, Ibaraki, Japan;Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, Hong Kong.ORCID iD: 0000-0001-6800-5658
Toxico-Biochemistry Section, National Institute of Animal Health, Kannondai 3-1-5, Tsukuba, Ibaraki, Japan.
Toxico-Biochemistry Section, National Institute of Animal Health, Kannondai 3-1-5, Tsukuba, Ibaraki, Japan.
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2006 (English)In: Toxicological Sciences, ISSN 1096-6080, E-ISSN 1096-0929, Vol. 89, no 1, p. 93-107Article in journal (Refereed) Published
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Abstract [en]

Perfluorooctanoic acid (PFOA; Pentadecafluorooctanoic acid) is widely used in various industrial applications. It is persistent in the environment and does not appear to undergo further degradation or transformation. PFOA is found in tissues including blood of wildlife and humans; however, the environmental fate and biological effects of PFOA remain unclear. Microarray techniques of gene expression have become a powerful approach for exploring the biological effects of chemicals. Here, the Affymetrix, Inc. rat genome 230 2.0 GeneChip was used to identify alterations in gene regulation in Sprague-Dawley rats treated with five different concentrations of PFOA. Male rats were exposed by daily gavage to 1, 3, 5, 10, or 15 mg PFOA/kg, body weight (bw)/day for 21 days and at the end of the exposure, liver was isolated and total liver RNA were used for the gene chip analysis. Over 500 genes, whose expression was significantly (p < 0.0025) altered by PFOA at two-fold changes compared to control, were examined. The effects were dose-dependent with exposure to 10 mg PFOA/kg, bw/day, causing alteration in expression of the greatest number of genes (over 800). Approximately 106 genes and 38 genes were consistently up- or down-regulated, respectively, in all treatment groups. The largest categories of induced genes were those involved in transport and metabolism of lipids, particularly fatty acids. Other induced genes were involved in cell communication, adhesion, growth, apoptosis, hormone regulatory pathways, proteolysis and peptidolysis and signal transduction. The genes expression of which was suppressed were related to transport of lipids, inflammation and immunity, and especially cell adhesion. Several other genes involved in apoptosis; regulation of hormones; metabolism; and G-protein coupled receptor protein signaling pathways were significantly suppressed.

Place, publisher, year, edition, pages
Oxford University Press, 2006. Vol. 89, no 1, p. 93-107
Keywords [en]
Fatty acid and lipid metabolism; GeneChip; Liver gene expression; Perfluorinated compounds; PFOA
National Category
Environmental Sciences
Research subject
Enviromental Science
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URN: urn:nbn:se:oru:diva-50011DOI: 10.1093/toxsci/kfj011ISI: 000233991000010PubMedID: 16221955Scopus ID: 2-s2.0-29544437778OAI: oai:DiVA.org:oru-50011DiVA, id: diva2:950389
Available from: 2016-07-29 Created: 2016-04-28 Last updated: 2017-11-28Bibliographically approved

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Yeung, L W Y

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