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     petit     

Hélène Petit, Ph.D.

Researcher

Agriculture et Agroalimentaire Canada

Centre de recherche et de développement sur le bovin laitier et le porc

2000, rue Collège

C.P. 90, succ. Lennoxville

Sherbrooke, (Québec) J1M 1Z3

Téléphone : 819-565-9174, poste 210

Télécopieur : 819-564-5507

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Research Interests: 

  • Effects of alimentation fatty acids on the genetic expression used in the gestation of dairy cows
  • Amelioration of the composition of milk by feeding cows different fatty acids and anitoxydants

 

Summary of Results:

 

It has been shown that flaxseed decreases embryo mortality in dairy cows and that this is due to greater expression of genes present in the endometrium that involves the establishment of pregnancy and to lower secretion of series 2 prostaglandins. Such a decrease in series 2 prostaglandins has been reported at the time of embryo implantation. Omega 3 fatty acids present in flaxseed also modulate the production of mediators involved in the production of cytokines with positive effects on immunity and contribute to prevent the fatty liver syndrome by improving parameters involved in the development of fatty liver.  

 

Lab members:

Nathalie Gagnon, M. Sc., research assistant (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Liette Veilleux, associate researcher (This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.)">This email address is being protected from spambots. You need JavaScript enabled to view it.)

Cristiano Côrtes, Ph. D., Post-doc (This email address is being protected from spambots. You need JavaScript enabled to view it.) 

 

Awards:

2002: Winner of the Award for Excellence in Nutrition and Meat Science. Given by the Canadian Society of Animal Science.  

2005: Recipient of the national Gold Harvest Award from AAFC for extraordinary realisations benefiting to AAFC, its clients or employees.

 

List of Publications: 

Côrtes, C., Gagnon, N., Benchaar, C., et Petit, H.V. (2008). << Intra-individual variation of in vitro metabolism of lignans in ruminal fluid and feces. >>, Canadian Journal of Animal Science, 88(1), p. 146. (Résumé)

Farmer, C., Petit, H.V., Giguère, A., et Weiler, H. (2008). << Circulating fatty acid profile and bone resorption in gilts fed dietary flax prepubertally. >>, Canadian Journal of Animal Science, 88(1), p. 160. (Résumé)

Gagnon, N., Côrtes, C., Benchaar, C., et Petit, H.V. (2008). << In vitro metabolism of flaxseed lignans by bovine ruminal microflora. >>, Canadian Journal of Animal Science, 88(1), p. 141. (Résumé)

Gagnon, N., Côrtes, C., Petit, H.V., et Benchaar, C. (2008). << In vitro metabolism of flaxseed lignans by bovine fecal microflora. >>, Canadian Journal of Animal Science, 88(1), p. 141. (Résumé)

Martineau, R., Petit, H.V., Benchaar, C., Lapierre, H., Ouellet, D.R., Pellerin, D., et Berthiaume, R.R. (2008). << Effets du lasalocid ou du monensin sur la biohydrogénation ruminale in situ des acides gras insaturés du lin et du tournesol. >>, Canadian Journal of Animal Science, 88(2), p. 335-339.

Petit, H.V. et Palin, M.-F. (2008). << Letter to the Editor: A Response to the Comments of Rastani and Kertz (2008). >>, Journal of Dairy Science (JDS), 91(7), p. 2534. DOI: 10.3168/jds.2008-1173

Petit, H.V. et Palin, M.-F. (2008). << Nutrition and reproduction: the importance of omega-3 fatty acids. >>, Canadian Journal of Animal Science, 88(1), p. 184. (Résumé)

Petit, H.V., Cavalieri, F.B., Santos, G.T., Morgan, J., et Sharpe, P. (2008). << Quality of Embryos Produced From Dairy Cows Fed Whole Flaxseed and the Success of Embryo Transfer. >>, Journal of Dairy Science (JDS), 91(5), p. 1786-1790. DOI: 10.3168/jds.2007-0782

Tremblay, G.F., Laberge, S., Castonguay, Y., Chiquette, J., Ouellet, D.R., Delaney, S., et Petit, H.V. (2008). << Devenir des transgènes et de la protéine Bt dans l'ensilage, les grains traité s et le contenu ruminal. >>, Canadian Journal of Animal Science, 88(1), p. 85-95.

Cortes, C., N. Gagnon, C. Benchaar, and H. V. Petit. 2008. In vitro metabolism of flax lignans by rumen and fecal microflora of dairy cows. J. Appl. Micro. In Press.

Brito, A. F., G. F. Tremblay, A. Bertrand, Y. Castonguay, G. Bélanger, R. Michaud, H. Lapierre, C. Benchaar, H. V. Petit, D. R. Ouellet, and R. Berthiaume. 2008. Alfalfa cut at sundown improves milk yield of late-lactation dairy cows. J. Dairy Sci. 91. In Press.

Beauchemin, K.A., McGinn, S.M., et Petit, H.V. (2007). << Stratégies de réduction des émanations de méthane par les bovins : enrichissement de la ration avec des lipides. >>, Canadian Journal of Animal Science, 87(3), p. 431-440.

Benchaar, C., Petit, H.V., Berthiaume, R.R., Ouellet, D.R., Chiquette, J., et Chouinard, P.Y. (2007). << Effects of Essential Oils on Digestion, Ruminal Fermentation, Rumen Microbial Populations, Milk Production, and Milk Composition in Dairy Cows Fed Alfalfa Silage or Corn Silage. >>, Journal of Dairy Science (JDS), 90(2), p. 886-897.

Benchaar, C., Petit, H.V., McAllister, T.A., et Chouinard, P.Y. (2007). << Yields of fatty acids in milk of dairy cows fed a high- or low- forage diet supplemented with either flaxseed or flaxseed oil. >>, 2007 Joint Annual Meeting of the ADSA, PSA, AMPA, ASAS, San Antonio, TX, USA, July 7-12, 2007.

Côrtes, C., Gagnon, N., Benchaar, C., et Petit, H.V. (2007). << Intraindividual variation of in vitro metabolism of lignans in ruminal fluid and feces. >>, The Canadian Nutrition Congress 2007, Joint Annual Meeting of the CAOCS, CSAS, and CSNS, Winnipeg Convention Centre, Winnipeg, MB, Canada, June 18-21, 2007.

da Silva, D.C., Santos, G.T., Branco, A.F., Damasceno, J.C., Kazama, R., Matsushita, M., Horst, J.A., dos Santos, W.B.R., et Petit, H.V. (2007). << Production Performance and Milk Composition of Dairy Cows Fed Whole or Ground Flaxseed With or Without Monensin. >>, Journal of Dairy Science (JDS), 90(6), p. 2928-2936. DOI: 10.3168/jds.2006-573

Farmer, C., Petit, H.V., Weiler, H., et Capuco, A.V. (2007). << Effects of dietary supplementation with flax during prepuberty on fatty acid profile, mammogenesis, and bone resorption in gilts. >>, Journal of Animal Science, 85(7), p. 1675-1686. DOI: 10.2527/jas.2007-0022

Gagnon, N., Côrtes, C., Benchaar, C., et Petit, H.V. (2007). << In vitro metabolism of flaxseed lignans by bovine fecal microflora. >>, The Canadian Nutrition Congress 2007, Joint Annual Meeting of the CAOCS, CSAS, and CSNS, Winnipeg Convention Centre, Winnipeg, MB, Canada, June 18-21, 2007.

Gagnon, N., Côrtes, C., Benchaar, C., et Petit, H.V. (2007). << In vitro metabolism of flaxseed lignans by bovine ruminal microflora. >>, The Canadian Nutrition Congress 2007, Joint Annual Meeting of the CAOCS, CSAS, and CSNS, Winnipeg Convention Centre, Winnipeg, MB, Canada, June 18-21, 2007.

Martineau, R., Benchaar, C., Petit, H.V., Lapierre, H., Ouellet, D.R., Pellerin, D., et Berthiaume, R.R. (2007). << Effects of ionophore (lasalocid or monensin) supplementation on nitrogen metabolism of mid-lactating dairy cows. >>, The Canadian Nutrition Congress 2007, Joint Annual Meeting of the CAOCS, CSAS, and CSNS, Winnipeg Convention Centre, Winnipeg, MB, Canada, June 18-21, 2007.

Martineau, R., Benchaar, C., Petit, H.V., Lapierre, H., Ouellet, D.R., Pellerin, D., et Berthiaume, R.R. (2007). << Effects of Lasalocid or Monensin Supplementation on Digestion, Ruminal Fermentation, Blood Metabolites, and Milk Production of Lactating Dairy Cows. >>, Journal of Dairy Science (JDS), 90(12), p. 5714-5725. DOI: 10.3168/jds.2007-0368

Neves, C.A., Santos, G.T., Matsushita, M., Alves, E.M., Oliveira, R.L., Branco, A.F., Silva, D.C., Furlan, A.C., et Petit, H.V. (2007). << Intake, whole tract digestibility, milk production, and milk composition of Holstein cows fed extruded soybeans treated with or without lignosulfonate. >>, Animal Feed Science and Technology, 134(1-2), p. 32-44.

Petit, H.V. et Benchaar, C. (2007). << Production de lait, composition du lait, composition du sang et taux de conception chez la vache laitière recevant différentes sources de gras. >>, Canadian Journal of Animal Science, 87(4), p. 591-600.

Petit, H.V. et Tremblay, G.F. (2007). << Determination of protein degradability and its importance in ruminant nutrition. >>, dans Ling, J.R. (dir.) - Dietary Protein Research Trends., Nova Science Publishers Inc, New York, p. 137-164.

Petit, H.V., Palin, M.-F., et Doepel, L. (2007). << Hepatic Lipid Metabolism in Transition Dairy Cows Fed Flaxseed. >>, Journal of Dairy Science (JDS), 90(10), p. 4780-4792. DOI: 10.3168/jds.2007-0066

Petit, H.V., Small, J.A., Palin, M.-F., Giguère, A., et Santos, G.T. (2007). << Effets d'une supplementation en lin sur l'expression endométriale du ISG17 et les concentrations intrautérines en prostaglandines des vaches laitières primipares soumises à une ovulation synchronisée basée sur le GnRH. >>, Canadian Journal of Animal Science, 87(3), p. 343-352.

Santos, G.T., da Silva, D.C., Branco, A.F., Damasceno, J.C., Marchi, F.E., et Petit, H.V. (2007). << Consommation, digestibilité et métabolites sanguins de vaches recevant du lin avec ou sans monensin. >>, 44th Reuniao Anual da Sociedade Brasileira de Zootecnia, Jaboticabal, Brazil, July 24-27, 2007.

Ambrose, D.J., Kastelic, J.P., Corbett, R., Pitney, P.A., Petit, H.V., Small, J.A., et Zalkovic, P. (2006). << Lower Pregnancy Losses in Lactating Dairy Cows Fed a Diet Enriched in -Linolenic Acid. >>, Journal of Dairy Science (JDS), 89(8), p. 3066-3074.

Benchaar, C., Petit, H.V., Berthiaume, R.R., Whyte, T.D., et Chouinard, P.Y. (2006). << Effects of addition of essential oils and monensin premix on digestion, ruminal fermentation, milk production, and milk composition in dairy cows. >>, Journal of Dairy Science (JDS), 89(11), p. 4352-4364.

Benchaar, C., Petit, H.V., McAllister, T.A., et Chouinard, P.Y. (2006). << Effect of flaxseed and flaxseed oil supplementation on milk fatty acid composition in dairy cows fed high- or low-forage diets. >>, Journal of Dairy Science (JDS), 84(Suppl.1), p. 62. (Résumé)

da Silva, D.C., dos Santos, W.B.R., Pintro, P.T.M., Boatto, D.A., Visentainer, J.V., et Petit, H.V. (2006). << Butter quality of Holstein cows fed whole or ground flaxseed with or without monensin. >>, Revista de Ciências Veterinárias, 4(Suppl.1), p. 30-31.

Lessard, M., Petit, H.V., Gagnon, N., et Bilodeau, P. (2006). << Effet des acides gras chez la vache en transition. >>, Le Producteur de Lait Québécois, 26(5), p. 32-33.

Martineau, R., Benchaar, C., Petit, H.V., Lapierre, H., Ouellet, D.R., Pellerin, D., et Berthiaume, R.R. (2006). << Effect of lasalocid or monensin supplementation on nitrogen metabolism in midlactating dairy cows. >>, Journal of Dairy Science (JDS), 84(Suppl.1), p. 234. (Résumé)

Palin, M.-F., Petit, H.V., Brochu-Gaudreau, K., Small, J.A., et Beaudry, D. (2006). << Use of subtractive hybridization to identify genes affected by omega 3 fatty acids in day 17 embryos and endometrial tissues. >>, 8th World Congress on Genetics Applied to Livestock Production, Belo Horizonte, MG, Brazil, August 13-18, 2006.

Petit, H.V. et Mir, P.S. (2006). << Milk production, milk composition, digestion, and feed intake of cows fed different concentrations of whole flaxseed. >>, 2006 ADSA & ASAS Joint Annual Meeting, Minneapolis, MN, USA, July 9-13, 2006, p. M173.

Petit, H.V. et Palin, M.-F. (2006). << Flaxseed reproduction in dairy cows. >>, 61st Flax Institute of the United States, Fargo, ND, USA, March 22-24, 2006, p. 105-113.

Petit, H.V. et Twagiramungu, H. (2006). << Conception rate and reproductive function of dairy cows fed different fat sources. >>, Theriogenology, 66(5), p. 1316-1324.

Petit, H.V.Berthiaume, R.R. (2006). << Effect of feeding different sources of fat during gestation and lactation on reproduction of beef cows and calf performance. >>, Canadian Journal of Animal Science, 86(2), p. 235-243.

Benchaar, C., Petit, H.V., McAllister, T.A., et Chouinard, P.Y. (2005). << Effect of flaxseed and flaxseed oil supplementation on digestion, milk production, and milk composition in dairy cows fed diets with different forage levels. >>, Journal of Dairy Science (JDS), 83(Suppl.1), p. 177. (Résumé)

Benchaar, C., Petit, H.V., McAllister, T.A., et Chouinard, P.Y. (2005). << Effects of flaxseed and flaxseed oil supplementation on ruminal fermentation characteristics, and ruminal ciliate protozoal populations in cows fed high- or low- forage diets. >>, Journal of Dairy Science (JDS), 83(Suppl.1), p. 179. (Résumé)

Benchaar, C., Petit, H.V., McAllister, T.A., et Chouinard, P.Y. (2005). << In sacco forage fiber degradation in the rumen of lactating cows fed high- or low-forage diets supplemented with flaxseed or flaxseed oil. >>, Journal of Dairy Science (JDS), 83(Suppl.1), p. 176. (Résumé)

Cavalieri, F.B., Santos, G.T., Matsushita, M., Petit, H.V., Rigolon, L.P., Silva, D.C., Horst, J.A., et Capovilla, L.C. (2005). << Milk production and milk composition of dairy cows fed Lac1007 or whole flaxseed. >>, Canadian Journal of Animal Science, 85(3), p. 413-416.

Gonthier, C., Mustafa, A.F., Ouellet, D.R., Chouinard, P.Y., Berthiaume, R.R., et Petit, H.V. (2005). << Feeding Micronized and Extruded Flaxseed to Dairy Cows: Effects on Blood Parameters and Milk Fatty Acid Composition. >>, Journal of Dairy Science (JDS), 88(2), p. 748-756.

Palin, M.-F., Beaudry, D., Small, J.A., et Petit, H.V. (2005). << Effects of feeding flaxseed on cyclooxygenase 2 (Cox-2) and peroxisome proliferator-activated receptors (PPAR) delta and gamma mRNA levels at the time of maternal recognition of pregnancy in Holstein cows. >>, 38th Annual Meeting of the Society for Study of Reproduction, Québec City, QC, Canada, July 24-27, 2005.

Petit, H.V., Ivan, M., et Mir, P.S. (2005). << Effects of flaxseed on protein requirements and N excretion of dairy cows fed diets with two protein concentrations. >>, Journal of Dairy Science (JDS), 88(5), p. 1755-1764.

Petit, H.V., Ivan, M., et Mir, P.S. (2005). << Improvement in N utilization by feeding flaxseed. >>, Livestock Environmental Initiative Conference, Toronto, ON, Canada, February 7-8, 2005, p. 35-36.

Petit, H.V., Palin, M.-F., GiguPre, A., et Mir, P.S. (2005). << Transfer of enterolactone in the milk of dairy cows fed flaxseed or flaxseed meal. >>, 4th NIZO Dairy Conference, Prospects for health, well-being and safety, Papendal, Netherlands, June 15-17, 2005, p. 69.

Tremblay, G.F., Lefebvre, D., Petit, H.V., et Lafrenière, C. (2005). << La valeur nutritive des fourrages. >>, publié dedans Bélanger, G., Couture, L., Tremblay, G.F. (eds.) - Les plantes fourragères, Centre de référence en agriculture et agroalimentaire du Québec (CRAAQ), Québec, QC, 154-156. (Transfert de technologie)

Tremblay, G.F., Petit, H.V., Berthiaume, R.R., et Fournier, A.R. (2005). << La gestion des fourrages pour l'alimentation des ruminants. >>, publié dedans Bélanger, G., Couture, L., Tremblay, G.F. (eds.) - Les plantes fourragères, Centre de référence en agriculture et agroalimentaire du Québec (CRAAQ), Québec, QC, 172-190. (Transfert de technologie)