PMID: 6989392Jan 1, 1980Paper

Cold exposure and mammary glucose metabolism in the lactating goat

The British Journal of Nutrition
A FaulknerG E Thomson

Abstract

1. [U-14C]glucose was infused intravenously into conscious lactating goats exposed to thermoneutral or cold environments for a total of 24 h. The irreversible loss of glucose from the whole body and uptake of glucose by the mammary gland was measured and glucose utilization in the udder was studied by measuring the incorporation of radioactivity into carbon dioxide in mammary venous blood, into milk lactose and milk triglyceride-glycerol. 2. Exposure to cold increased the circulating level of glucose and slightly though not significantly, increased the non-mammary irreversible loss of glucose. 3. The extraction of glucose from the circulation by the udder fell, the secretion of lactose by the udder also fell and this correlated closely with the reduced secretion of milk in the cold. 4. Simultaneous measurements of the concentrations of insulin, growth hormone and corticosteroids in the arterial plasma were made. 5. The plasma concentration of corticosteroids increased significantly in the cold. 6. It is concluded that reduced glucose uptake and lactose synthesis by the udder are important factors which reduce milk secretion during cold exposure.

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Citations

Feb 1, 1980·Pflügers Archiv : European journal of physiology·E M ThomsonG E Thompson
Jan 1, 1997·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·H SanoK Ambo
Jun 1, 1983·The Proceedings of the Nutrition Society·G H McDowell
Jan 16, 2007·Journal of Animal Physiology and Animal Nutrition·H SanoM Al-Mamun
Feb 24, 2001·Journal of Physiology and Biochemistry·M R Sanz SampelayoJ Boza
Mar 30, 2007·The British Journal of Nutrition·Natalia E Schlabritz-LoutsevitchMark J Nijland
Dec 5, 2009·Journal of the International Neuropsychological Society : JINS·Mario F JuruenaCynthia H Y Fu
Jul 12, 2017·Journal of Dairy Science·L Antonio González-GrajalesRudolf Staufenbiel
Dec 17, 2020·Animals : an Open Access Journal From MDPI·Wellington Coloma-GarcíaAhmed A K Salama
Oct 1, 1993·Comparative Biochemistry and Physiology. Comparative Physiology·M O Nielsen, K Jakobsen

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