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    Differences in the expression of genes involved in the somatotropic axis in divergent strains of Holstein-Friesian dairy cows during early and mid lactation

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    Author
    McCarthy, Sean D.
    Butler, Stephen cc
    Patton, Joe
    Daly, Mairead
    Morris, Dermot G.
    Kenny, David A.
    Waters, Sinead M.
    Keyword
    Holstein-Friesian
    Liver
    Gene expression
    Somatotropic axis
    Date
    2009-10
    
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    URI
    http://hdl.handle.net/11019/308
    Citation
    S.D. McCarthy, S.T. Butler, J. Patton, M. Daly, D.G. Morris, D.A. Kenny, S.M. Waters. Differences in the expression of genes involved in the somatotropic axis in divergent strains of Holstein-Friesian dairy cows during early and mid lactation. Journal of Dairy Science, Volume 92, Issue 10, October 2009, Pages 5229–5238. DOI: 10.3168/jds.2008-1856
    Abstract
    Differences in genetic selection criteria for dairy cows internationally have led to divergence in the Holstein-Friesian breed. The objective of this study was to compare hepatic expression of genes of the somatotropic axis in the North American Holstein-Friesian and the New Zealand Holstein-Friesian strains of dairy cow at early and mid lactation. Mature cows of both the North American Holstein-Friesian (n = 10) and New Zealand Holstein-Friesian (n = 10) strains were selected. Liver tissue was collected by percutaneous punch biopsy from all cows at 35 and 140 d postpartum, representing early and mid lactation, respectively. Total RNA was extracted and the hepatic expression of genes involved in the control of the somatotropic axis was examined. Abundance of insulin-like growth factor (IGF)-1 mRNA was greater in the New Zealand strain, concomitant with a tendency for increased expression of acid-labile subunit mRNA. Across strains, mRNA abundance of IGF-binding protein-1, IGF-binding protein-2, and growth hormone receptor 1A decreased from d 35 to 140 postpartum, whereas expression of IGF-1 and acid-labile subunit tended to increase. Abundance of suppressor of cytokine signaling-3 mRNA was increased at d 140 postpartum. Both the strain of Holstein-Friesian cow and the stage of lactation influenced expression of genes controlling the somatotropic axis in hepatic tissue.
    Funder
    National Development Plan Ireland
    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.3168/jds.2008-1856
    Scopus Count
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    Animal & Bioscience

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