Peripartal alterations of calcitonin gene-related peptide and minerals in dairy cows affected by milk fever
Article first published online: 4 MAR 2013
© 2013 American Society for Veterinary Clinical Pathology
Veterinary Clinical Pathology
Volume 42, Issue 1, pages 70–77, March 2013
How to Cite
Zebeli, Q., Beitz, D. C., Bradford, B. J., Dunn, S. M. and Ametaj, B. N. (2013), Peripartal alterations of calcitonin gene-related peptide and minerals in dairy cows affected by milk fever. Veterinary Clinical Pathology, 42: 70–77. doi: 10.1111/vcp.12022
- Issue published online: 4 MAR 2013
- Article first published online: 4 MAR 2013
- Alberta Milk
- Alberta Livestock Industry
- Natural Sciences and Engineering
- Calcium metabolism;
- downer cow;
- plasma cortisol;
Milk fever, a metabolic disease of dairy cattle, is associated with perturbations of calcium homeostasis, the pathogenesis of which is not yet completely understood.
The aim of this study was to investigate plasma concentrations of calcitonin gene-related peptide and selected minerals and metabolites in periparturient cows with and without milk fever.
Plasma concentrations of calcitonin gene-related peptide, as well as calcium, phosphate, magnesium, iron, glucose, lactate, and cortisol, were determined in multiple plasma samples from Jersey cows with and without spontaneous milk fever.
Cows affected by milk fever (n = 5) had lower concentrations of calcitonin gene-related peptide (P = .038) and inorganic phosphate (P < .001) in plasma than did the controls (n = 5). Also, these cows tended to have lower calcium concentrations (P = .071). Magnesium, iron, lactate, glucose, and cortisol concentrations were comparable between both groups of cows (P > .10). Around the day of calving, plasma concentrations of lactate, glucose, and cortisol increased and the concentration of iron decreased in all cows (P ≤ .01).
Despite the limited number of cows evaluated, this report is the first to indicate lowered concentrations of calcitonin gene-related peptide as part of the metabolic changes during milk fever in cows. Further work with a larger cohort of animals is warranted to understand the precise role of calcitonin gene-related peptide and the potential associations with disturbances in plasma minerals typically observed during milk fever.