Abstract:
:Many mechanism may participate in the inhibition of thyroid function by excess of iodine. The present study was aimed at answering the question, whether the excess of iodine influences the activity of type I thyroxine 5'-deiodinase. To 40 female rats fed with standard diet a dose of 42 micrograms of iodine daily was administered into the stomach through the gastric tube. Control group consisting of 10 rats received standard diet only. Part of the animals was sacrificed after each of the consecutive time intervals (2, 4, 7 and 14 days of treatment with iodine) and the activity of deiodinase in the thyroid as well as the blood serum levels of hormones, T3 and T4, were determined. A decrease in the activity of deiodinase in comparison with control group was observed during the whole experiment, the highest inhibition occurring after 4 days of treatment with iodine. A fall in the concentration of T3 was observed after the second and fourth dose of iodine, with no change in T4 concentration. The results of the experiments indicate that the excess of iodine inhibits the activity of type I thyroxine 5'-deiodinase in the thyroid.
journal_name
Endokrynol Poljournal_title
Endokrynologia Polskaauthors
Bednarczuk T,Pietrzykowski A,Słoń M,Nauman Asubject
Has Abstractpub_date
1993-01-01 00:00:00pages
405-12issue
4eissn
0423-104Xissn
2299-8306journal_volume
44pub_type
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journal_title:Endokrynologia Polska
pub_type: 杂志文章,评审
doi:
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journal_title:Endokrynologia Polska
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journal_title:Endokrynologia Polska
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journal_title:Endokrynologia Polska
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journal_title:Endokrynologia Polska
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更新日期:2012-01-01 00:00:00
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pub_type: 杂志文章
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journal_title:Endokrynologia Polska
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更新日期:2012-01-01 00:00:00
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journal_title:Endokrynologia Polska
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journal_title:Endokrynologia Polska
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journal_title:Endokrynologia Polska
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journal_title:Endokrynologia Polska
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