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RESEARCH INTERESTS: Lactation Mammary Biology RESEARCH SUMMARY: The objective of my program is to define the endocrine and biochemical regulation of nutrient metabolism during lactation. Past work has included endocrine regulation of adipose tissue metabolism, mammary development and lactogenesis. Present focus is on sympathetic and adrenergic regulation of lipolysis in lactation. Data are used to construct and challenge bio-mathematical models integrating metabolism in the whole animal. Gene chip array analysis results are being integrated into metabolic models, and a mechanistic model of nutrient use and reproduction is being constructed and evaluated. Animal models studied include dairy cattle, pigs, and rats; the latter two serve as models of human metabolism as well.
REPRESENTATIVE PUBLICATIONS: Hanigan, M. D., H. G. Bateman, J. G. Fadel, and J. P. McNamara. 2006. Metabolic Models of Ruminant Metabolism: Recent Improvements and Current Status. J. Dairy Sci. 89: E52-64E.
G. J. Phillips, T. L. Citron, J. S. Sage, K. A. Cummins, M. J. Cecava, and J. P. McNamara. 2003. Adaptations in body muscle and fat in transition dairy cattle fed differing amounts of protein and methionine hydroxy analog. J. Dairy Science 86:3634-3647.
McNamara, J.P. and Baldwin, R.L. (2000) Estimation
of parameters describing lipid metabolism in lactation: challenge
of existing knowledge described in a model of metabolism. J.
Dairy Sci. 83:128-143. Kelson, A.B., McNamara, J.P., Pandey, A., Ryan, K.J.,
Dorie, M.J., McAfee P.A., Menke, D.R., Brown, J.M., Tracy, M.
(1998) 1, 2, 4-Benzotriaine 1, 4 dioxides. An important class
of hypoxic cytotoxins with antitumor activity. Anticancer Drug
Des. 13:575-592. Dodson, M.V., Vierck, J.L., Hossner, K.L., Byrne, K., McNamara
J.P. (1997) The development and utility of a defined muscle
and fat co-culture system. Tissue Cell. 29:517-524. McNamara, J.P. (1997) Adipose tissue metabolism during
lactation: where do we go fom here? Proc Nutr Soc. 56:149-167. King, R.H., J.E. Pettigrew, J.P. McNamara, J.P. McMurtry, T.L. Henderson, M.R. Hathaway, and A.F. Sower (1996). The effect of exogenous prolactin on lactation performance of first-litter sows given protein-deficient diets during first pregnancy. Anim. Repro. Sci. 41:37-50. McNamara, J.P. (1995). Role and Regulation of Adipose Tissue Metabolism During Lactation. J. Nutr. Bioc. 6:120-129. Leisman, J.S., J.P. McNamara, A.V. Capuco, M. Binelli, W.K. Vanderkooi, R.S. Emery, H.A. Tucker, and W.M. Moseley (1995). Comparison of growth-hormone releasing factor and somatotropin: lipid and glucose metabolism in dairy cows. J. Dairy Sci. 78:2159-2166. Baldwin, R.L., R.S. Emery, and J.P. McNamara (1994). Metabolic Relationships in the Supply of Nutrients for Milk Protein Synthesis: Integrative Modeling. J. Dairy Sci. 77:2821-2836. Pettigrew, J.E., J.P. McNamara, M.D. Tokach, R.H. King, and B.A. Crooker (1993). Metabolic connections between nutrient intake and lactational performance. Livestock Prod. Sci. 35:137-152. Marinchenko, G.V., J.P. McNamara, S. Sun, and B. Becker-Khaleel (1992). Growth hormone alters metabolic effects and proteolysis of insulin in adipose tissue during lactation. Proc. Soc. Exp. Biol. Med. 200:57-66. Davis, S.R., R.J. Collier, J.P. McNamara, H.H. Head, W.J. Croom, and C.J. Wilcox (1988). Effects of thyroxine and growth hormone treatment of dairy cows on mammary uptake of glucose, oxygen, and other milkfat precursor. J. Anim. Sci. 66:80-89. Pocius, P.A., C.R. Baumrucker, , and D.E. Bauman (1980). Y-glutamyl transpeptidase activity in rat mammary tissue: changes during lactogenesis and possible role in amino acid transport for milk protein synthesis. Biochem. J. 188:565. |
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