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McDougall et al. - 2017 - Effect of prepartum energy balance on neutrophil f.pdf (1.37 MB)
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Effect of prepartum energy balance on neutrophil function following pegbovigrastim treatment in periparturient cows

journal contribution
posted on 2023-05-03, 16:38 authored by Scott McDougall, Stephen LeBlanc, Axel HeiserAxel Heiser
Treatment with granulocyte colony-stimulating factor (G-CSF) increases polymorphonuclear cell (neutrophil) count and enhances neutrophil function in the periparturient cow. Prepartum undernutrition was hypothesized to reduce the effect of a commercially available recombinant bovine G-CSF product (pegbovigrastim) on neutrophil count and function. Hence this study was undertaken to test the effect of undernutrition for approximately 1 mo before calving on the innate immune response to pegbovigrastim. Cows (n = 99) on pasture were blocked by expected calving date and body condition score and randomly assigned in a 2 × 2 factorial design. The first factor was that cows were fed to exceed energy requirements prepartum (full feeding) or restricted to approximately 85% of prepartum energy requirements (restricted feeding). The second factor was that at approximately 7 d before expected calving date, half the cows in each feed group were injected with pegbovigrastim and the remaining half were injected with saline. Treatments were repeated on the day of calving. Blood samples were collected pre- and postcalving for complete blood count, biochemistry, and in vitro assessment of neutrophil function including phagocytosis, myeloperoxidase release, and oxidative burst. Prepartum energy restriction resulted in lower body weight, a higher proportion of cows with elevated concentrations (i.e., > 0.4 mmol/L) of fatty acids, and higher average β-hydroxybutyrate concentrations before calving relative to fully fed cows. Treatment with pegbovigrastim increased the total white cell, neutrophil, lymphocyte, and monocyte counts. Pegbovigrastim treatment resulted in increased release of myeloperoxidase by neutrophils. Prepartum feeding group did not have an effect, and no feeding group × treatment interaction was observed for any of the white cell counts or functional tests. We concluded that pegbovigrastim treatment results in significant increases in neutrophil count and enhances neutrophil function as indicated by increased myeloperoxidase release. The response to pegbovigrastim was not affected by restricted prepartum energy intake.

History

Rights statement

© 2017, THE AUTHORS. Published by FASS and Elsevier Inc. on behalf of the American Dairy Science Association®.

Language

  • English

Does this contain Māori information or data?

  • No

Publisher

Elsevier

Journal title

Journal of Dairy Science

ISSN

0022-0302

Citation

McDougall, S., LeBlanc, S. J., & Heiser, A. (2017). Effect of prepartum energy balance on neutrophil function following pegbovigrastim treatment in periparturient cows. Journal of Dairy Science, 100(9), 7478-7492. doi:10.3168/jds.2017-12786

Funder

Cognosco

Contract number

A22065

Job code

33459

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