Responses of milk protein, arterial AA concentration, and mammary AA metabolism to graded abomasal casein infusion in lactating goats

Wang, J.F.; Wang, Z.H.; Li, B.; Lin, Xueyan

doi:10.1016/j.smallrumres.2007.02.003

Cited by 2 publications

(2 citation statements)

References 45 publications

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“…One catheter was inserted distally into the mammary vein and used for infusing para-aminohippuric acid (PHA, Sigma Chemical Co., USA). The other was inserted proximally and used for collecting blood samples (Wang et al, 2007). Catheters were kept unobstructed by flushing once daily with a sterile heparin-saline (200 U/ml) solution.…”

Section: Animals Diets and Experimental Proceduresmentioning

confidence: 99%

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Responses of mammary amino acid metabolism and aminopeptidase N gene expression to duodenal soyabean small peptides and infusion of free amino acids in lactating goats

Liu¹,

Wang²,

Wang³

et al. 2010

J. Anim. Feed Sci.

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AB TRACTThe duodenal perfusion technique was used to determine whether small peptides were more effective than free amino acids (FAA) for milk protein synthesis and to investigate the effects of infusing soyabean small peptides (SSP) or their FAA on the mammary amino acid (AA) metabolism of lactating goats. Six Saanen goats with silicon catheters implanted into their carotid artery and mammary veins were used in a Latin square design. Blood samples were collected from the carotid artery and mammary vein. The AA concentrations in the plasma, as well as mammary AA uptakes were monitored. The results showed that the concentrations of most essential amino acids (EAA) were significantly higher (P<0.05) in the FAA infusion treatment as compared with the SSP treatment, except for Val, Ile, and Met. The concentration of most of the non-essential amino acids (NEAA), measured after FAA infusion, was highest (P<0.05) when compared with the SSP treatment and the controls. The mammary uptake of most of EAA in the FAA infusion group was higher in comparison with the SSP infusion group. The mammary uptake to milk output ratios of EAA (except for Met) were low in the SSP treatment, compared with the FAA treatment. Significant increases in milk protein yield and milk protein content in the FAA infusion treatment were observed (P<0.05). In the SSP infusion treatment, milk yield and

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Section: Animals Diets and Experimental Proceduresmentioning

confidence: 99%

“…Mammary plasma flow (MPF) was determined by calculating the arteriovenous difference between PAH infusion rates as follows (Wang, 2007):…”

Section: Calculations and Statistical Analysesmentioning

confidence: 99%

Responses of mammary amino acid metabolism and aminopeptidase N gene expression to duodenal soyabean small peptides and infusion of free amino acids in lactating goats

Liu¹,

Wang²,

Wang³

et al. 2010

J. Anim. Feed Sci.

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Metabolic responses to the deficiency of Lys, Arg, Met, or His in the mammary gland of lactating goats

Fan

Lin

et al. 2013

Small Ruminant Research

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Responses of milk protein, arterial AA concentration, and mammary AA metabolism to graded abomasal casein infusion in lactating goats

Cited by 2 publications

References 45 publications

Responses of mammary amino acid metabolism and aminopeptidase N gene expression to duodenal soyabean small peptides and infusion of free amino acids in lactating goats

Responses of mammary amino acid metabolism and aminopeptidase N gene expression to duodenal soyabean small peptides and infusion of free amino acids in lactating goats

Metabolic responses to the deficiency of Lys, Arg, Met, or His in the mammary gland of lactating goats

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