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The purpose of the study is to establish the nature of the influence of autonomic nervous regulation on the activity of the antioxidant defense system of broiler chickens. For the study of autonomic nervous regulation, Cobb 500 chickens crossbred were used. Autonomic nervous regulation was studied by variation pulsometry in chickens 30-35 days old, after which reference representatives of three types of tone of autonomic regulation were selected: sympathicotonic, normotonic and vagotonic. It was established that the average value of superoxide dismutase activity in sympathicotonic chickens is statistically higher than in normotonic chickens, which indicates a more active oxygen consumption in sympathicotonic chickens. As a result, the formation of superoxide radical increases, which requires more superoxide dismutase to accelerate its neutralization. In 60-day-old sympathicotonic chickens, indicators of superoxide dismutase activity remain at a lower level than in normotonic chickens, and in vagotonic chickens, a downward trend is noted. The indicator of glutathione peroxidase with the predominance of the sympathetic department of autonomic regulation is statistically lower than vago- and normotonic. A correlation was determined between superoxide dismutase and retinol level in 35-day-old normotonic chickens, which indicates the mutual coordination of the work of the enzymatic and non-enzymatic link of the antioxidant system under the condition of balanced autonomous regulation. However, with age, the parasympathetic division of the autonomic nervous system increases the influence on the relationship between superoxide dismutase and retinol in vagotonic chickens, in contrast to normotonic ones. It was found that the level of relationships between catalase and tocopherol increases with age in chickens with a vagotonic type of autonomous regulation. It has been proven that the level of tocopherol and retinol in 35-day-old vagotonic chickens is higher than that of normotonic chickens. Hens of the sympathicotonic and normotonic groups had a lower level of tocopherol in the blood plasma than in vagotonic hens. The level of retinol in the blood plasma of chickens with vagotonic type of autonomous nervous regulation is higher than that of normotonic and sympathicotonic chickens. This indicates the highest level of antioxidant protection in vagotonic chickens, which forms a solid foundation for higher immune status and growth in such birds. [ABSTRACT FROM AUTHOR]

Protein is the building material for every cells, without it life and development of the body are impossible. Protein metabolism is regulated by a large number of mechanisms and depends on both the feed received by the animal and its individual characteris􀆟cs. The la􀆩er are determined by the central and autonomic nervous systems. The results of biochemical studies of the content of total protein, albumin and globulin of chickens of Cobb-500 cross with different tone of the autonomic nervous system (ANS) are presented in the ar􀆟cle. The purpose of the study was to inves􀆟gate the regulatory effect of ANS on protein metabolism and the specificity of its content in the blood serum of chickens in meat produc􀆟on. Determina􀆟on of the ANS tone in chickens was performed by the method of varia􀆟onal heart rate according to R.M. Bayevsky (1984). The recording of the electrocardiogram was performed by a portable EC3T 01-"R-D" electrocardiograph with a tape speed of 50 mm/s. We determined two main indicators: moda (Mo) and the amplitude of the moda (Amo) heart rate. Depending on the dominance of the ANS departments, the chickens were divided into three groups: (St -sympathicotonic, NSt-normo-sympathicotonic, Nt-normotonic), with 8 individuals each. The amplitude of moda was used as an auxiliary indicator in determining the dominant department of the ANS. Blood was collected for biochemical studies twice from the inferior vein twice at day 35 and day 60. Chickens with intermediate type of ANS (NSt) were found to have sta􀆟s􀆟cally higher levels of total protein content, albumin (Р < 0.001) and globulin (Р < 0.01 vs. Nt). Total protein and globulin content were significantly higher in St than in Nt (p < 0.05). At the 60th day of life, only St had higher albumin content than Nt (Р < 0.01). The globulin frac􀆟on of protein in NSt and Nt exceeded St (Р < 0.05). Therefore, the increased tone of the sympathe􀆟c nervous system has a posi􀆟ve effect on the level of protein frac􀆟ons in the blood of birds, in par􀆟cular, provides a higher level of them than representa􀆟ves of the normotonic type of ANS. [ABSTRACT FROM AUTHOR]