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1. Cabergoline accelerated and enhanced the mammary involution during drying-off in dairy cows

Author

Boutinaud, Marion, Isaka, Naomie, Deflandre, Audrey, De Prado Taranilla, Ana Isabel, Sordillo, L. M., Lollivier, Vanessa, Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), CEVA Santé Animale, Michigan State University [East Lansing], Michigan State University System, AGROCAMPUS OUEST, and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA)

Subjects
sécrétion, [SDV]Life Sciences [q-bio], vache laitière, agoniste, glande mammaire, tarissement, dopamine, ComputingMilieux_MISCELLANEOUS, prolactine
Abstract

International audience

Published
2016

2. Cabergoline hastened lactoferrin immunoprotection in the mammary tissue during drying-off in dairy cows

Author

Boutinaud, Marion, Isaka, Naomie, Deflandre, Audrey, Wiart, Sandra, Lamberton, Philippe, De Prado Taranilla, Ana Isabel, Lollivier, Vanessa, Sordillo, L. M., Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de la Recherche Agronomique (INRA), CEVA Santé Animale, Michigan State University [East Lansing], Michigan State University System, Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)

Subjects
[SDV.GEN]Life Sciences [q-bio]/Genetics, [SDV.GEN.GA]Life Sciences [q-bio]/Genetics/Animal genetics, [SDV]Life Sciences [q-bio], vache laitière, réponse immunitaire, agoniste, glande mammaire, [INFO]Computer Science [cs], lactoferrine, tarissement, dopamine, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

3. Dry-off facilitator cabergoline hastened the GLUT-1 decrease and lactoferrin increase in the mammary tissue during drying-off in dairy cows

Author

Boutinaud, Marion, Isaka, Naomie, Deflandre, Audrey, Wiart, Sandra, Lamberton, Philippe, De Prado Taranilla, Ana Isabel, Lollivier, Vanessa, Physiologie, Environnement et Génétique pour l'Animal et les Systèmes d'Elevage [Rennes] (PEGASE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), CEVA Santé Animale, and AGROCAMPUS OUEST-Institut National de la Recherche Agronomique (INRA)

Subjects
vache laitière, [SDV]Life Sciences [q-bio], involution, glande mammaire, food and beverages, tarissement, prolactine
Abstract

In ruminants, the early phase of drying-off is a period of mammary gland involution where lactose secretion is inhibited and lactoferrin is stimulated. GLUT-1 is a glucose transporter that has a key role in supplying substrate for lactose synthesis. The analysis of the changes in lactose and lactoferrin contents in mammary secretions and in GLUT-1 and lactoferrin contents in the udder can provide valuable information about the speed of the mammary involution. To assess the effect of prolactin inhibition by cabergoline on udder involution, 14 Holstein dairy cows were injected with a single i.m. administration of 5.6 mg cabergoline (n = 7) or placebo (n = 7) within 4 h after the last milking the day of drying off (D0). After D0, hay and water ad libitum was supplied to the cows for 10 d. Mammary secretion samples, collected during lactation (D-6) and at D1, D2, D3, D4, D8 and D14 after the drying-off, were used for lactose and lactoferrin analysis. Mammary biopsy samples, collected at D-6, D1 and D8, were used for GLUT-1 mRNA and lactoferrin analyses. Lactose content of mammary secretions progressively decreased during involution, whereas their lactoferrin content increased. The change in lactose content was associated with paralleled change in GLUT-1 mRNA level in the udder. These decreases were faster in cabergoline treated cows compared with controls with lower lactose content in cabergoline treated cows already by D1 than in controls (P < 0.05) and significant decrease in GLUT-1 mRNA levels at D1 and D8 respectively for cabergoline and control treatments compared with D-6 (P ≤ 0.05). The rise of lactoferrin content in mammary secretions was significant starting at D4 in the cabergoline treated cows (P ≤ 0.05) whereas it only happened at D8 in controls (P < 0.05). Overall, cabergoline treatment decreased GLUT-1 mRNA level (P < 0.05) and increased lactoferrin content (P = 0.10). Similarly, lactoferrin immunostaining intensity in the mammary tissue was higher at D1 than at D-6 in cabergoline treated cows (P ≤ 0.05), whereas it tended to be higher only at D8 in controls (P < 0.10). Our results indicate that cabergoline treatment was efficient to hasten the udder involution and therefore facilitates the dry-off.

Published
2015

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