TNFα altered inflammatory responses, impaired health and productivity, but did not affect glucose or lipid metabolism in early-lactation dairy cows

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dc.contributor.author Yuan, Kai
dc.contributor.author Farney, Jaymelynn K.
dc.contributor.author Mamedova, Laman K.
dc.contributor.author Sordillo, Lorraine M.
dc.contributor.author Bradford, Barry J.
dc.date.accessioned 2014-03-05T22:21:54Z
dc.date.available 2014-03-05T22:21:54Z
dc.date.issued 2014-03-05
dc.identifier.uri http://hdl.handle.net/2097/17204
dc.description.abstract Inflammation may be a major contributing factor to peripartum metabolic disorders in dairy cattle. We tested whether administering an inflammatory cytokine, recombinant bovine tumor necrosis factor-α (rbTNFα), affects milk production, metabolism, and health during this period. Thirty-three Holstein cows (9 primiparous and 24 multiparous) were randomly assigned to 1 of 3 treatments at parturition. Treatments were 0 (Control), 1.5, or 3.0 µg/kg body weight rbTNFα, which were administered once daily by subcutaneous injection for the first 7 days of lactation. Statistical contrasts were used to evaluate the treatment and dose effects of rbTNFα administration. Plasma TNFα concentrations at 16 h post-administration tended to be increased (P<0.10) by rbTNFα administration, but no dose effect (P>0.10) was detected; rbTNFα treatments increased (P<0.01) concentrations of plasma haptoglobin. Most plasma eicosanoids were not affected (P>0.10) by rbTNFα administration, but 6 out of 16 measured eicosanoids changed (P<0.05) over the first week of lactation, reflecting elevated inflammatory mediators in the days immediately following parturition. Dry matter and water intake, milk yield, and milk fat and protein yields were all decreased (P<0.05) by rbTNFα treatments by 15 to 18%. Concentrations of plasma glucose, insulin, β-hydroxybutyrate, non-esterified fatty acids, triglyceride, 3-methylhistidine, and liver triglyceride were unaffected (P>0.10) by rbTNFα treatment. Glucose turnover rate was unaffected (P = 0.18) by rbTNFα administration. The higher dose of rbTNFα tended to increase the risk of cows developing one or more health disorders (P = 0.08). Taken together, these results indicate that administration of rbTNFα daily for the first 7 days of lactation altered inflammatory responses, impaired milk production and health, but did not significantly affect liver triglyceride accumulation or nutrient metabolism in dairy cows. en_US
dc.language.iso en_US en_US
dc.relation.uri http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0080316 en_US
dc.subject Inflammation en_US
dc.subject Dairy cattle en_US
dc.subject Peripartum metabolic disorders en_US
dc.subject Milk production en_US
dc.title TNFα altered inflammatory responses, impaired health and productivity, but did not affect glucose or lipid metabolism in early-lactation dairy cows en_US
dc.type Article (publisher version) en_US
dc.date.published 2013 en_US
dc.citation.doi doi:10.1371/journal.pone.0080316 en_US
dc.citation.issue 11 en_US
dc.citation.jtitle PLoS ONE en_US
dc.citation.spage e80316 en_US
dc.citation.volume 8 en_US
dc.contributor.authoreid jkj en_US
dc.contributor.authoreid mamedova en_US
dc.contributor.authoreid bbradfor en_US


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