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In this study, we exposed male F344\/N rats for 5 days to DMPT (0, 1, 6, 20, 60, or 120 mg\/kg [oral gavage]) to explore the early changes in the nasal cavity after short-term exposure. Lesions occurred in the nasal cavity including hyperplasia of transitional cell epithelium (60 and 120 mg\/kg). Nasal tissue was rapidly removed and preserved for subsequent laser capture microdissection and isolation of the transitional cell epithelium (0 and 120 mg\/kg) for transcriptomic studies. DMPT transitional cell epithelium gene transcript patterns were characteristic of an antioxidative damage response (e.g., Akr7a3, Maff, and Mgst3), cell proliferation, and decrease in signals for apoptosis. The transcripts of amino acid transporters were upregulated (e.g., Slc7a11). The DMPT nasal transcript expression pattern was similar to that found in the rat nasal cavity after formaldehyde exposure, with over 1,000 transcripts in common. Molecular changes in the nasal cavity after DMPT exposure suggest that oxidative damage is a mechanism of the DMPT toxic and\/or carcinogenic effects.<\/jats:p>","DOI":"10.1177\/0192623316637708","type":"journal-article","created":{"date-parts":[[2016,4,20]],"date-time":"2016-04-20T22:01:50Z","timestamp":1461189710000},"page":"835-847","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":7,"title":["Molecular Changes in the Nasal Cavity after\n                    <i>N, N<\/i>\n                    -dimethyl-p-toluidine Exposure"],"prefix":"10.1177","volume":"44","author":[{"given":"June K.","family":"Dunnick","sequence":"first","affiliation":[{"name":"Toxicology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B. 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