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The effects of iodine supplementation to the pregnant ewe on immunoglobulin G, vitamin E, T3 and T4 levels in the newborn lamb

Published online by Cambridge University Press:  23 November 2017

T.M. Boland ,
L. Hayes ,
J.J. Murphy ,
J.J. Callan ,
T. Sweeney  and
T.F. Crosby
T.M. Boland*
Affiliation:
University College Dublin, Belfield, Dublin 4, Ireland
L. Hayes
Affiliation:
University College Dublin, Belfield, Dublin 4, Ireland
J.J. Murphy
Affiliation:
University College Dublin, Belfield, Dublin 4, Ireland
J.J. Callan
Affiliation:
University College Dublin, Belfield, Dublin 4, Ireland
T. Sweeney
Affiliation:
University College Dublin, Belfield, Dublin 4, Ireland
T.F. Crosby
Affiliation:
University College Dublin, Belfield, Dublin 4, Ireland
*
Email:tommy.boland@ucd.ie
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Extract

Lambs are born hypoimmunocompetent and are dependent on the absorption of immunoglobulin G (IgG) from colostrum for immunity in early life, similar to the situation with vitamin E (vit. E), which is also involved in maximising immunocompetence (Puls, 1994). High-level iodine supplementation during late gestation period of the ewe results in the production of progeny with an impaired ability to absorb colostral IgG and vit. E post partum (Boland et al., 2006). Iodine is essential in the synthesis of the thyroid hormones, thyroxine (T4) and triiodothyronine (T3; McDonald et al., 2002) that regulate the metabolic pattern of most cells and play a vital role in the process of cellular differentiation, growth and development in the foetus and neonate (Stanbury, 1996). The objectives of this experiment were to determine the effects of offering supplementary iodine for the final three weeks of pregnancy on serum vit. E, IgG, T3 and T4 concentrations at 1h, 24h and 72h post partum.

Type
Theatre Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2007 , April 2007 , pp. 114
Copyright
Copyright © The British Society of Animal Science 2007

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References

Boland, T.M., Callan, J.J., Brophy, P.O., Quinn, P.J. and Crosby, T.F. 2006. Lamb serum immunoglobulion G and vitamin E concentrations at 24-hours post partum in response to various maternal mineral and iodine supplementation regimens. Animal Science 82: 319–326.Google Scholar
Puls, R. 1994. Vitamin levels in animal health: Diagnostic data and bibliographies, first edition. Sherpa International, Clearbrook, British Columbia, Canada.Google Scholar
McDonald, P., Edwards, R.A., Greenhalgh, J.F.D. and Morgan, C.A. 2002. Animal Nutrition, sixth edition. Longman Scientific and Technical, U.S. Google Scholar
Stanbury, J.B. 1996. In Present knowledge in nutrition, seventh edition (ed. Ziegler, E.E. and Filer, L.J.). pp 378. ILSI press, Washington DC.Google Scholar