Abstract:
:Thyroid hormone (T3) responsiveness of the PEPCK promoter in vivo was examined in both PEPCK/bGH(460) and PEPCK/bGH(335) mouse lines. Transgenic and non-transgenic littermates were treated with methimazole or PTU for 6 or 4 weeks, respectively, then treated +/- T3 for 10 days. In PEPCK/bGH(460) and PEPCK/bGH(355) transgenic mice, the bGH mRNA was decreased by 65% and 46%, respectively, in hyperthyroid mice when compared to euthyroid controls. Endogenous PEPCK mRNA was decreased by 33% in hyperthyroid non-transgenic mice. The conclusion of this study is that chronic hyperthyroidism in mice inhibits PEPCK-directed expression of the transgene when either the -460/+73 or the -355/+73 promoter/regulatory elements are used.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Xu C,McGrane MMdoi
10.1006/bbrc.1996.0084subject
Has Abstractpub_date
1996-01-17 00:00:00pages
473-9issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(96)90084-4journal_volume
218pub_type
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