Prolactin and the onset of mammary extraction of plasma triacylglycerols during lactogenesis in the goat.
1. In untreated goats, the onset of mammary extraction of circulating triacylglycerols (TG) at parturition occurred shortly after the peak of prolactin concentration in circulating plasma. Suppressing this peak of systemic prolactin, by acutely treating with bromocriptine, delayed the onset of mammary extraction of TG and secretion of long-chain TG fatty acids. 2. Regular unilateral removal of secretion pre-partum, which brought about an early local onset of TG extraction and secretion of long-chain TG fatty acids in this treated half of the udder, was not associated with an increased local concentration of prolactin in secretion in this gland.
Hannah Research Institute, Ayr, U.K.
G E
GE
Thompson
D000818:Animals; D001971:Bromocriptine / Q000494:pharmacology; D005260:Female; D006041:Goats; D007700:Kinetics; D007774:Lactation; D008321:Mammary Glands, Animal / Q000502:physiology*; D011247:Pregnancy; D011388:Prolactin / Q000502:physiology*; D014280:Triglycerides / Q000097:blood*
D014280:Triglycerides; D001971:Bromocriptine; D011388:Prolactin