Rumen-protected choline supplementation in periparturient dairy goats: effects on liver and mammary gland

Baldi, A.; Bruckmaier, Rupert; D'Ambrosio, F.; Campagnoli, A.; Pecorini, C.; Rebucci, R.; Pinotti, L. (2011). Rumen-protected choline supplementation in periparturient dairy goats: effects on liver and mammary gland. Journal of agricultural science, 149(5), pp. 655-661. Cambridge: Cambridge University Press 10.1017/S0021859611000104

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The current study investigated the effects of supplementing rumen-protected choline (RPC) on metabolic profile, selected liver constituents and transcript levels of selected enzymes, transcription factors and nuclear receptors involved in mammary lipid metabolism in dairy goats. Eight healthy lactating goats were studied: four received no choline supplementation (CTR group) and four received 4g RPC chloride/day (RPC group). The treatment was administered individually starting 4 weeks before expected kidding and continuing for 4 weeks after parturition. In the first month of lactation, milk yield and composition were measured weekly. On days 7, 14, 21 and 27 of lactation, blood samples were collected and analysed for glucose, beta-hydroxybutyrate, non-esterified fatty acids and cholesterol. On day 28 of lactation, samples of liver and mammary gland tissue were obtained. Liver tissue was analysed for total lipid and DNA content; mammary tissue was analysed for transcripts of lipoprotein lipase (LPL), fatty acid synthase (FAS), sterol regulatory binding proteins 1 and 2, peroxisome proliferator-activated receptor gamma and liver X receptor alpha. Milk yield was very similar in the two groups, but R PC goats had lower (P < 0.05) plasma beta-hydroxybutyrate. The total lipid content of liver was unaffected (P = 0.890), but the total lipid/DNA ratio was lower (both P < 0.05) in RPC than CTR animals. Choline had no effect on the expression of the mammary gland transcripts involved in lipid metabolism. The current plasma and liver data indicate that choline has a positive effect on liver lipid metabolism, whereas it appears to have little effect on transcript levels in mammary gland of various proteins involved in lipid metabolism. Nevertheless, the current results were obtained from a limited number of animals, and choline requirement and function in lactating dairy ruminants deserve further investigation.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Physiology
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH)

UniBE Contributor:

Bruckmaier, Rupert

ISSN:

0021-8596

Publisher:

Cambridge University Press

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:31

Last Modified:

27 Oct 2019 15:44

Publisher DOI:

10.1017/S0021859611000104

Web of Science ID:

000295195600012

BORIS DOI:

10.7892/boris.12144

URI:

https://boris.unibe.ch/id/eprint/12144 (FactScience: 218432)

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