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CD49f+ mammary epithelial cells decrease in milk from dairy cows stressed by overstocking during the dry period

Published online by Cambridge University Press:  20 November 2017

Mario Baratta*
Affiliation:
Department Veterinary Science, University of Turin, Italy, Largo Braccini 2, 10095 Grugliasco (TO), Italy
Silvia Miretti
Affiliation:
Department Veterinary Science, University of Turin, Italy, Largo Braccini 2, 10095 Grugliasco (TO), Italy
Paolo Accornero
Affiliation:
Department Veterinary Science, University of Turin, Italy, Largo Braccini 2, 10095 Grugliasco (TO), Italy
Giovanna Galeati
Affiliation:
Department Veterinary Medical Sciences (DIMEVET), University of Bologna, 40062 Ozzano dell'Emilia (BO), Italy
Andrea Formigoni
Affiliation:
Department Veterinary Medical Sciences (DIMEVET), University of Bologna, 40062 Ozzano dell'Emilia (BO), Italy
Gianfranco Gabai
Affiliation:
Department Comparative Biomedicine and Food Science, University of Padua, 35020 Legnaro (PD), Italy
Daniele Nucera
Affiliation:
Department Agricultural, Forest and Food Sciences, University of Torino, 10095 Grugliasco (TO), Italy
Eugenio Martignani
Affiliation:
Department Veterinary Science, University of Turin, Italy, Largo Braccini 2, 10095 Grugliasco (TO), Italy
*
*For correspondence; e-mail: mario.baratta@unito.it

Abstract

The work reported in this Research Communication describes the modification in epithelial cell populations during the first and the last month of milking in Holstein Friesian cows that have undergone different management during the dry period, and we report the differential expression of CD49f+ and cytokeratin18+ cell subpopulations. Twenty six cows were randomly divided into 2 balanced groups that were housed at stocking density of either 11 m2 (CTR) or 5 m2 from 21 ± 3 d before the expected calving until calving. Cells collected from milk samples taken in early lactation and late lactation were directly analysed for CD45, CD49f, cytokeratin 14, cytokeratin 18 and cell viability. We observed a differential expression with a significant reduction in CD49f+ (P < 0·01) and cytokeratin 18+ (P < 0·05) cells in early lactation. Differences were still evident in late lactation but were not significant. These observations suggest that mammary epithelial cell immunophenotypes could be associated with different animal management in the dry period and we hypothesise they may have a role as biomarkers for mammary gland function in dairy cows.

Information

Type
Research Article
Copyright
Copyright © Hannah Research Foundation 2017 

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