The protective effect of γ-aminobutyric acid on the development of immune function in chickens under heat stress

Journal of Animal Physiology and Animal Nutrition
J Tang, Z Chen

Abstract

This study aimed to investigate the protective effect of γ-aminobutyric acid (GABA) on the development of immune function in chicks under heat stress (HS). One-day-old male Wenchang chicks were randomly divided into control (CK), HS and GABA+HS groups. The GABA+HS group was fed with 0.2 ml GABA solution (50 mg/kg) daily by oral gavage. The HS and GABA+HS groups were placed in 40 ± 0.5 °C environment for 2 h heat treatment from 13:00 each day. Blood samples were routinely taken at 14, 21, 28, 35 and 42 days respectively, and the contents of T and B lymphocyte subsets in the blood and tissue were analysed by flow cytometry after FITC/PE double staining; the plasma levels of interleukin (IL)-2, immunoglobulin (Ig)A, IgG and IgM were determined using ELISA. The thymus and the bursa of fabricius were also collected to analyse for organ index and observe for the changes in tissue microstructure. In addition, the chicks received primary and secondary immunizations with attenuated Newcastle disease (ND) vaccine (LaSota strain) at 7 and 28 days respectively; conventional hemagglutination inhibition (HI) assay was performed to monitor the titre changes in plasma antibody against ND virus in the birds. Our results indicated that the indic...Continue Reading

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Citations

Jan 2, 2021·Animals : an Open Access Journal From MDPI·Francesco PeriniEmiliano Lasagna
May 22, 2021·Journal of Thermal Biology·Abdel-Moneim Eid Abdel-MoneimTarek A Ebeid

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