Evaluation of poultry net energy system under heat stress condition on broiler and molecular tools utilization for the metabolic response

• Grant number: 22/07690-1
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: July 01, 2022
• End date: July 31, 2023
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
• Principal Investigator: Nilva Kazue Sakomura
• Grantee: Lucas Pimentel Bonagurio
• Host Institution: Faculdade de Ciências Agrárias e Veterinárias (FCAV). Universidade Estadual Paulista (UNESP). Campus de Jaboticabal. Jaboticabal , SP, Brazil
• Associated research grant: 19/26575-6 - Net energy system for poultry, AP.TEM

Abstract

Heat stress conditions represent a challenge in the production of broilers. However, several nutritional strategies have been proposed to mitigate the deleterious effects caused by chronic stress conditions. In this sense, the net energy system presents an alternative for the feed formulation, based on the principle of reducing the heat increment fraction of the diets, making them more efficient in the nutrients utilization. Therefore, it is proposed in this project the evaluation of the formulation system based on net energy for broilers under heat stress conditions. A biological assay will be conducted in an experimental poultry house under two conditions (open poultry house with high temperature and with environmental condition system). For both conditions will be offered, four diets formulated with variable levels of the relationship between the heat increment and the metabolizable energy intake (50:100, 55:100, 60:100, and 65:100), evaluating the productive and metabolic response of the animals. At the end of the experimental period, a group of birds will be selected from each treatment for tissue sampling of the liver, muscle, and distal section of the ileum, which will be stored for further analysis of molecular indicators. Subsequently, PCRq molecular tools will sequence the gene expression of thermosensitive chaperones (Hsp70 and Hsp90) and the protein related to lipid metabolism PPARG that triggers cellular oxidative stress. This study will promote essential results for implementing the net energy system in the practical feeding under heat challenge conditions. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

SAKOMURA, NILVA KAZUE; REIS, MATHEUS; BONAGURIO, LUCAS PIMENTEL; LEME, BRUNO BALBINO; VIANA, GABRIEL SILVA; MELARE, MIRELLA CUNHA; GOUS, ROBERT MERVYN. The Response to Dietary Leucine in Laying Lens. ANIMALS, v. 13, n. 16, p. 14-pg., 2023-08-01. (13/25761-4, 22/07690-1)