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Lapierre, Hélène, agr., Ph.D.

Research Scientist, Animal Metabolism

Contact Information:

2000 College Street
Sherbrooke, Quebec J1M 0C8
Telephone: 819-780-7234
Fax: 819-564-5507
Email: helene.lapierre@agr.gc.ca

Areas of Expertise:

  • study of the factors that influence the efficiency of nutrient use in the production of milk and milk components
  • Study of the intermediary metabolism of dairy cows: factors affecting release (absorption or synthesis) or utilization of nutrients by the gut, the liver and the mammary gland, on a net or total stable isotopes basis.
  • improvement of the transfer of protein from dairy rations into milk protien in order to lower milk production costs (competitiveness of the dairy sector) and reducing nitrogenous excreta in the environment

Current Projects:

  • Measurements and prediction of net amino acid flows in the digestive system, liver and mammary gland
  • How protein and energy supply interact in the regulation of milk yield?
  • Effect of onclusion of canola meal in dairy rations

Affiliations:

  • Order of Agrologists of Quebec
  • Associate Professor, Université Laval, Department of Animal Science
  • Member of the Canadian Society of Animal Science
  • Member of the American Dairy Science Association

Research publications

2016

2015

2014

2013

  • Bahloul, L., Ortigues-Marty, I., Vernet, J., Lapierre, H., Nozière, P., and Sauvant, D. (2013). "Prediction of net hepatic release of glucose using a « hybirid » mechanistic model in ruminants applied to positive energy balance.", in Oltjen, J.W., Kebreab, E. and Lapierre, H. (eds.) - Energy and protein metabolism and nutrition in sustainable animal production. EAAP publication No. 134., Wageningen Academic Publishers, The Netherlands, pp. 349-350.
  • Galindo, C.E., Larsen, M., Ouellet, D.R., Maxin, G., Pellerin, D., and Lapierre, H. (2013). "Effect of amino acid supply on whole body and tissue glucose kinetics in postpartum dairy cows.", in Oltjen, J.W., Kebreab, E. and Lapierre, H. (eds.) - Energy and protein metabolism and nutrition in sustainable animal production. EAAP publication No. 134., Wageningen Academic Publishers, The Netherlands, pp. 451-452.
  • Iroshan, I.H., Lapierre, H., and Doepel, L. (2013). "The effect of a limited supply of phenylalanine, threonine, and tryptophan on milk yield and composition.", in Oltjen, J.W., Kebreab, E. and Lapierre, H. (eds.) - Energy and protein metabolism and nutrition in sustainable animal production. EAAP publication No. 134., Wageningen Academic Publishers, The Netherlands, pp. 115-116.
  • Lapierre, H., Lemosquet, S., and Ouellet, D.R. (2013). "Contribution of essential amino acids to glucose metabolism and lactose secretion in late lactation dairy cows.", in Oltjen, J.W., Kebreab, E. and Lapierre, H. (eds.) - Energy and protein metabolism and nutrition in sustainable animal production. EAAP publication No. 134., Wageningen Academic Publishers, The Netherlands, pp. 447-448.
  • Larsen, M., Galindo, C.E., Ouellet, D.R., Maxin, G., Kristensen, N.B., and Lapierre, H. (2013). "Effect of abomasal amino acid infusion on splanchnic metabolism in postpartum transition dairy cows.", in Oltjen, J.W., Kebreab, E. and Lapierre, H. (eds.) - Energy and protein metabolism and nutrition in sustainable animal production. EAAP publication No. 134., Wageningen Academic Publishers, The Netherlands, pp. 409-410.
  • Martineau, R., Ouellet, D.R., Lapierre, H. (2013). Feeding canola meal to dairy cows: A meta-analysis on lactational responses, 96(3), 1701-1714. http://dx.doi.org/10.3168/jds.2012-5740
  • Maxin, G., Ouellet, D.R., Lapierre, H. (2013). Effect of substitution of soybean meal by canola meal or distillers grains in dairy rations on amino acid and glucose availability, 96(12), 7806-7817. http://dx.doi.org/10.3168/jds.2013-6976
  • Maxin, G., Ouellet, D.R., Lapierre, H. (2013). Ruminal degradability of dry matter, crude protein, and amino acids in soybean meal, canola meal, corn, and wheat dried distillers grains, 96(8), 5151-5160. http://dx.doi.org/10.3168/jds.2012-6392
  • Maxin, G., Ouellet, D.R., and Lapierre, H. (2013). "Contribution of amino acids to glucose and lactose synthesis in lactating dairy cows.", in Oltjen, J.W., Kebreab, E. and Lapierre, H. (eds.) - Energy and protein metabolism and nutrition in sustainable animal production. EAAP publication No. 134., Wageningen Academic Publishers, The Netherlands, pp. 443-445.
  • Ouellet, D.R., Valkeners, D., and Lapierre, H. (2013). "Effects of metabolizable protein supply on N efficiency; plasma amino acid concentrations in dairy cows.", in Oltjen, J.W., Kebreab, E. and Lapierre, H. (eds.) - Energy and protein metabolism and nutrition in sustainable animal production. EAAP publication No. 134., Wageningen Academic Publishers, The Netherlands, pp. 453-454.

2012

2011

2010

2009

Other science related publications

2017

  • Lapierre, H., R. Martineau, S. Binggeli, D. Pellerin, and D.R. Ouellet. 2017. Is it needed to balance a dairy ration for metabolizable protein if it is balanced for essential amino acids and RDP? Pages 13-31 In: Proceedings of the Dairy Cattle Nutrition Workshop. PennState Extension Dairy Team. Grantville, PA, USA.

2015

  • Lapierre, H. and Ouellet, D.R. (2015). "How the efficiency of utilization of histidine varies with supply in dairy cows?", Journal of Dairy Science (JDS), 98(Suppl. 2), pp. 609. (Abstract)
  • Lapierre, H., Ouellet, D.R., and Martineau, R. (2015). "Challenges to determine the true net supply of amino acids.", 29th ADSA Discover Conference on Amino Acid Requirements, Chicago, USA, May 26-29, 2015.
  • Ouellet, D.R. and Lapierre, H. (2015). "Endogenous Nitrogen Secretion in Dairy Cows: Transaction along the digestive tract and implication in amino acid requirements.", 29th ADSA Discover Conference on Amino Acid Requirements, Chicago, USA, May 26-29, 2015.
  • Ouellet, D.R., Maxin, M., and Lapierre, H. (2015). "Urea kinetics in dairy cows fed soybean meal (SBM), canola meal (CM), corn high protein dried distillers grains (HPDDG) or wheat dried distillers grains with solubles (WDDGS).", Journal of Dairy Science (JDS), 98(Suppl. 2), pp. 462. (Abstract)

2014

  • Artegoitia, V.M., Girard, C.L., Lapierre, H., Campagna, S.R., Harte, F., and de Veth, M.J. (2014). "Evaluation of choline metabolites in milk as potential biomarkers for choline absorption in the lactating dairy cow.", Journal of Dairy Science (JDS), 97(E-Suppl.1), pp. 361. (Abstract)
  • Giallongo, F., Oh, J., Frederick, T., Weeks, H., Hristov, A.N., Lapierre, H., Patton, R.A., Gehman, A., and Parys, C. (2014). "Effects of slow-release urea, rumen-protected methionine, and histidine on performance of dairy cows fed metabolizable protein-deficient diets.", Journal of Dairy Science (JDS), 97(E-Suppl.1), pp. 174. (Abstract)
  • Iroshan, I.H., Lapierre, H., and Doepel, L. (2014). "Effect of a limited supply of phenylalanine, threonine, and tryptophan on mammary metabolism of dairy cows.", Journal of Dairy Science (JDS), 97(E-Suppl.1), pp. 751. (Abstract)
  • Lapierre, H., Doepel, L., Pacheco, D., and Ouellet, D.R. (2014). "Amino acid requirement and post-absorptive metabolism in cattle: implications for ration formulation.", Florida Ruminant Nutrition Symposium, University of Florida, Florida, USA, pp. 167-168.
  • Lapierre, H., Ouellet, D.R., Fournier, A., and Pellerin, D. (2014). "Comment maximiser l’utilsation de l’azote des vaches laitières: répercussions environnementales et monétaires.", 38e Symposium sur les bovins laitiers. CRAAQ, Québec, QC, Canada, pp. 35-53.
  • Lapierre, H., Ouellet, D.R., and Lobley, G.E. (2014). "Estimation of histidine requirement in lactating dairy cows.", Journal of Dairy Science (JDS), 97(E-Suppl.1), pp. 757. (Abstract)
  • Ouellet, D.R. and Lapierre, H. (2014). Endogenous secretions in dairy cows - Advance Report (Period: October 22th, 2013 – July 21th, 2014). (Report)
  • Ouellet, D.R., Lobley, G.E., and Lapierre, H. (2014). "Histidine requirement of dairy cows determined by the indicator amino acid oxidation (AAO) technique.", Journal of Dairy Science (JDS), 97(E-Suppl.1), pp. 757. (Abstract)

2013

  • Lapierre, H., Doepel, L., Pacheco, D., and Ouellet, D.R. (2013). "Update on protein and amino acid requirements for lactating dairy cows.", Eastern Nutrition Conference, Animal Nutrition Association of Canada, Québec, Canada, pp. 225-236.
  • Patton, R.A., Lapierre, H., and Parys, C. (2013). "Relationships between circulating plasma amino acid concentrations and milk protein production in lactating dairy cows.", Journal of Animal Science, 96(E-Suppl. 2/J). (Abstract)

2012

  • Lapierre, H., Doepel, L., and Ouellet, D.R. (2012). "Update on protein and amino acid requirements for lactating dairy cows (no.864).", ADSA-AMPA-ASAS-CSAS-WSASAS Joint Annual Meeting, Pheonix, AZ, USA, July 15-19, 2012. (Presentation)

2011

  • Lapierre, H., Doepel, L., Raggio, G., and Lemosquet, S. (2011). "Mammary metabolism of amino acids in dairy cows.", Journal of Animal Science, 89(E-Suppl. 1), pp. 2 (#6). (Abstract)
  • Lapierre, H., Ouellet, D.R., Doepel, L., and Lobley, G.E. (2011). "Lysine in dairy cows: From digestion to milk protein.", 2011 Dairy Cattle Nutrition Workshop, Penn State, Holiday Inn, Grantville, PA, USA, November 9-10, 2011, pp. 19-25. (Workshop)
  • Lapierre, H., Raggio, G., Ouellet, D.R., Martineau, R., and Doepel, L. (2011). "The study of amino acid metabolism, from absorption to milk protein secretion.", III Simposio internacional avanço em técnicas de pesquisa em nutriçao para ruminantes, Pirassununga, Brazil, March 24-25, 2011, pp. 115-136.
  • Lee, C., Hristov, A.N., Cassidy, T.W., Heyler, K. S., Lapierre, H., Varga, G. A., and Parys, C. (2011). "Effect of dietary protein level and rumen-protected amino acid supplementation on dietary amino acid apparent digestibility and recovery in milk in lactating dairy cows.", Journal of Animal Science, 89(E-Suppl. 1), pp. 666 (#C689). (Abstract)
  • Lee, C., Hristov, A.N., Cassidy, T.W., Heyler, K. S., Lapierre, H., Varga, G. A., and Parys, C. (2011). "Effect of dietary protein level and rumen-protected methionine supplementation on performance of lactating dairy cows.", Journal of Animal Science, 89(E-Suppl. 1), pp. 181 (#79). (Abstract)
  • Lee, C., Hristov, A.N., Heyler, K. S., Cassidy, T.W., Lapierre, H., Varga, G. A., and Parys, C. (2011). "Effect of dietary protein level and rumen-protected amino acids supplementation on ruminal fermentation and nitrogen utilization in lactating dairy cows.", Journal of Animal Science, 89(E-Suppl. 1), pp. 609 (#W279). (Abstract)

2010

  • Côrtes, C., Martineau, R., Sauvant, D., Ouellet, D.R., Vernet, J., Ortigues-Marty, I., and Lapierre, H. (2010). "Meta-analysis for the prediction of net portal absorption (NPA) of amino acid-N (AAN) and ammonia (NH3) in ruminants.", Journal of Dairy Science (JDS), 93(E-Suppl. 1), pp. 451. (Abstract)
  • Galindo, C.E., Ouellet, D.R., Pellerin, D., Lemosquet, S., Ortigues-Marty, I., and Lapierre, H. (2010). "Protéines ingérées et lactose du lait: quel est le lien?", 34e Symposium sur le bovin laitier, Drummondville, QC, Canada, October 28, 2010, pp. 208-209. (Abstract)
  • Girard, C.L., Preynat, A., Graulet, B., and Lapierre, H. (2010). "Could "minor" nutrients such as B vitamins alter major metabolic pathways in lactating dairy cows?", in Crovetto, G.M. (ed.) - Energy and Protein Metabolism and Nutrition: 3rd EAAP International Symposium on Energy and Protein Metabolism and Nutrition Parma, Italy 6-10 September 2010. EAAP publication No. 127, Wageningen Academic Publishers, The Netherlands.
  • Lapierre, H., Galindo, C.E., Lemosquet, S., Ortigues-Marty, I., Doepel, L., and Ouellet, D.R. (2010). "Protein supply, glucose kinetics and milk yield in dairy cows.", 3rd EAAP International Symposium on Energy and Protein: Metabolism and Nutrition, Parma, Italy, September 6-10, 2010, EAAP publication no. 127, pp. 275-286.
  • Lapierre, H., Ouellet, D.R., Martineau, R., Côrtes, C., Raggio, G., and Doepel, L. (2010). "From crude protein to absorbed amino acids…to milk protein.", 2010 Cornell Nutrition Conference for Feed Manufacturers. 72nd Meeting, Doubletree Hotel, East Syracuse, NY, USA, October 19-21, 2010, pp. 25-37.
  • Lemosquet, S., Guinard-Flament, J., Raggio, G., Hurtaud, C., van Milgen, J., and Lapierre, H. (2010). "How does increasing protein supply or glucogenic nutrients modify mammary metabolism in lactating dairy cows?", 3rd EAAP International Symposium on Energy and Protein: Metabolism and Nutrition, Parma, Italy, September 6-10, 2010, EAAP publication no. 127, pp. 177-188. (Abstract)
  • Lemosquet, S., Guinard-Flament, J., Raggio, G., Lapierre, H., and Rulquin, H. (2010). "Les apports de protéines augmentent-ils le volume de lait et les matières utiles.", 17e Journées 3R, Paris, France, December 8-9, 2010. (Abstract)
  • Lemosquet, S., Lobley, G.E., Koopman, R., van Loon, L.J.C., Kies, A.K., and Lapierre, H. (2010). "A large supply of phenylalanine is not oxidised by the mammary gland of dairy cows.", 3rd EAAP International Symposium on Energy and Protein: Metabolism and Nutrition, Parma, Italy, September 6-10, 2010, EAAP publication no. 127, pp. 139-140. (Abstract)
  • Loncke, C., Nozière, P., Kraft, G., Savary-Auzeloux, I., Vernet, J., Lapierre, H., Sauvant, D., and Ortigues-Marty, I. (2010). "Net portal absorption of energy nutrients in Ruminants: assessment of prediction models.", Journal of Dairy Science (JDS), 93(E-Suppl. 1), pp. 166. (Abstract)
  • Loncke, C., Nozière, P., Lemosquet, S., Vernet, J., Lapierre, H., Sauvant, D., and Ortigues-Marty, I. (2010). "Splanchnic release of glucose in relation to dietary supply and animal performances.", 17e Journées 3R, Paris, France, December 8-9, 2010. (Abstract)
  • Loncke, C., Nozière, P., Vernet, J., Lapierre, H., Sauvant, D., and Ortigues-Marty, I. (2010). "Empirical prediction of net splanchnic release of glucose in Ruminants from dietary and animal characteristics: a meta-analysis approach.", 3rd EAAP International Symposium on Energy and Protein: Metabolism and Nutrition, Parma, Italy, September 6-10, 2010, EAAP publication no. 127, pp. 227-228. (Abstract)
  • Ortigues-Marty, I., Loncke, C., Vernet, J., Lapierre, H., Sauvant, D., and Nozière, P. (2010). "From diets to splanchnic released energetic nutrients: empirical predictions in ruminants.", 3rd EAAP International Symposium on Energy and Protein: Metabolism and Nutrition, Parma, Italy, September 6-10, 2010, EAAP publication no. 127, pp. 165-176. (Abstract)
  • Ouellet, D.R., Valkeners, D., and Lapierre, H. (2010). "Does endogenous nitrogen contribute to over-estimate bacterial duodenal flow in ruminant estimated by 15N dilution technique?", 3rd EAAP International Symposium on Energy and Protein: Metabolism and Nutrition, Parma, Italy, September 6-10, 2010, EAAP publication no. 127, pp. 125-128.
  • Ouellet, D.R., Valkeners, D., and Lapierre, H. (2010). "Does endogenous nitrogen contribute to over-estimate bacterial duodenal flow in ruminant estimated by 15N dilution technique?", 3rd EAAP International Symposium on Energy and Protein: Metabolism and Nutrition, Parma, Italy, September 6-10, 2010, EAAP publication no. 127, pp. 127-128. (Abstract)

2009

  • Brito, A.F., Tremblay, G.F., Bertrand, A., Castonguay, Y., Bélanger, G., Michaud, R., Lapierre, H., Benchaar, C., Petit, H.V., Ouellet, D.R., and Berthiaume, R.R. (2009). "Alfalfa Cut At Sundown and Harvested As Baleage Increases Performance of Late-Lactation Dairy Cows.", 27th Western Canadian Dairy Seminar (WCDS): Forging Ahead Through Challenging, Capri Centre, Red Deer, AB, Canada, March 10-13, 2009, Session VII: Focus on Forage, pp. 368. (Abstract)
  • Hassanat, F., Lapierre, H., and Ouellet, D.R. (2009). "Effect of starch infusion site on glucose rate of appearance (Ra) and starch and crude protein nitrogen digestibility in dairy cows.", Journal of Dairy Science (JDS), 92(Suppl.), pp. 97. (Abstract)
  • Lapierre, H., Ouellet, D.R., and Doepel, L. (2009). "Do You Feed Protein or Amino Acids to Make Milk?", 27th Western Canadian Dairy Seminar (WCDS): Forging Ahead Through Challenging, Capri Centre, Red Deer, AB, Canada, March 10-13, 2009.
  • Loncke, C., Nozière, P., Vernet, J., Lapierre, H., Sauvant, D., and Ortigues-Marty, I. (2009). "Empirical prediction of net splanchnic release of ß-hydroxybutyrate in ruminants.", XIth International Symposium on Ruminant Physiology, Clermont-Ferrand, France, September 6-9, 2009. (Abstract)
  • Martineau, R., Sauvant, D., Ouellet, D.R., Vernet, J., Ortigues-Marty, I., and Lapierre, H. (2009). "Meta-analysis for the prediction of net portal absorption of amino acid nitrogen in ruminants.", Journal of Dairy Science (JDS), 92(Suppl.), pp. 469-470. (Abstract)
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