About: The impact of high iodine intake on thyroid function in ewes and lambs

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Description	OBJECTIVES: The objective of the study was to assess the metabolic risk of excessive dietary iodine intake in ewes and neonatal lambs. DESIGN: Pregnant Sumava ewes received an experimental diet containing 3.1 mg iodine per kg of dietary dry matter in Group A (control, n=13, 6 ewes and 7 lambs) and 5.1 mg iodine per kg of dietary dry matter in Group B (experimental, n=12, 6 ewes, 6 lambs) for eight months. Iodine was administered to ewes as calcium iodate. TSH in blood serum; TT3, TT4, fT(3), and fT(4) in blood plasma were examined in both groups of ewes and lambs to assess the risks of iodine intake above the permitted limit, as it applies to thyroid gland activity. RESULTS: Group B ewes showed a significant increase in TSH and TT4 only on day 1 after parturition. The highest values of TT4, TT3, and fT(3) in lambs were recorded on day 1 after birth. The lowest values of fT(3) and fT(4) in lambs were measured on day 60 after birth with no differences observed between the groups. In lambs of Group B the lower concentration of TSH until day 3 after birth was followed by a significant increase from day 10 after birth. CONCLUSION: Our results indicate a risk of postnatal hypothyroidism among lambs from pregnant and lactating ewes having a high iodine intake. OBJECTIVES: The objective of the study was to assess the metabolic risk of excessive dietary iodine intake in ewes and neonatal lambs. DESIGN: Pregnant Sumava ewes received an experimental diet containing 3.1 mg iodine per kg of dietary dry matter in Group A (control, n=13, 6 ewes and 7 lambs) and 5.1 mg iodine per kg of dietary dry matter in Group B (experimental, n=12, 6 ewes, 6 lambs) for eight months. Iodine was administered to ewes as calcium iodate. TSH in blood serum; TT3, TT4, fT(3), and fT(4) in blood plasma were examined in both groups of ewes and lambs to assess the risks of iodine intake above the permitted limit, as it applies to thyroid gland activity. RESULTS: Group B ewes showed a significant increase in TSH and TT4 only on day 1 after parturition. The highest values of TT4, TT3, and fT(3) in lambs were recorded on day 1 after birth. The lowest values of fT(3) and fT(4) in lambs were measured on day 60 after birth with no differences observed between the groups. In lambs of Group B the lower concentration of TSH until day 3 after birth was followed by a significant increase from day 10 after birth. CONCLUSION: Our results indicate a risk of postnatal hypothyroidism among lambs from pregnant and lactating ewes having a high iodine intake. (en)
Title	The impact of high iodine intake on thyroid function in ewes and lambs The impact of high iodine intake on thyroid function in ewes and lambs (en)
skos:prefLabel	The impact of high iodine intake on thyroid function in ewes and lambs The impact of high iodine intake on thyroid function in ewes and lambs (en)
skos:notation	RIV/60076658:12220/12:43883887!RIV13-MSM-12220___
http://linked.open...avai/predkladatel	Zemědělská fakulta
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(QH81105), S
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Peksa, Zdeněk Kroupová, Vlasta Trávníček, Jan Konečný, Roman Dušová, Hana
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Jihočeská univerzita v Českých Budějovicích / Zemědělská fakulta
http://linked.open...dnocenehoVysledku	140625
http://linked.open...ai/riv/idVysledku	RIV/60076658:12220/12:43883887
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	fT4; fT3; TT4; TT3; TSH; calcium iodate (en)
http://linked.open.../riv/klicoveSlovo	fT4 TSH TT3 TT4 calcium iodate fT3
http://linked.open...odStatuVydavatele	SE - Švédské království
http://linked.open...ontrolniKodProRIV	[14D207E50416]
http://linked.open...i/riv/nazevZdroje	Neuroendocrinology Letters
http://linked.open...in/vavai/riv/obor	GJ
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Patophysiological Effects Owing to Alimentary Iodine Excess in Cattle and Sheep.
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	33
http://linked.open...iv/tvurceVysledku	Konečný, Roman Kroupová, Vlasta Peksa, Zdeněk Svoboda, Martin Trávníček, Jan Baňoch, Tomáš Dušová, Hana
http://linked.open...ain/vavai/riv/wos	000311470400009
issn	0172-780X
number of pages	8 (xsd:int)
http://localhost/t...ganizacniJednotka	12220
is http://linked.open...avai/riv/vysledek of	The impact of high iodine intake on thyroid function in ewes and lambs

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