Heat stress decreases egg production of laying hens by inducing apoptosis of follicular cells via activating the FasL/Fas and TNF-α systems

Li, Guiming; Liu, Liping; Yin, Bin; Liu, Yueyue; Dong, Wenwen; Gong, Shuai; Zhang, Jie; Tan, Jing-He

doi:10.1016/j.psj.2020.07.024

Cited by 39 publications

(34 citation statements)

References 46 publications

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“…Additionally, data from Weather Trends showed that the temperature during the study period fluctuated between 4°C at the beginning of the study (mid-January) and 28°C at the end of the study (end May) causing heat stress resulting in the drop in body weight and egg production. Previous studies evaluating effect of heat stress in laying hens showed that a temperature above 26°C reduced the laying rate and the number of follicles and triggered apoptosis (Gui-Ming et al, 2020). Similar effect was noticed generally across all the treatment groups except that the impact was relatively lower in HSC fed groups with a trend directly proportional to the inclusion level.…”

Section: Discussionsupporting

confidence: 71%

Effect of dietary hemp seed cake on the performance of commercial laying hens

Kasula¹,

Solis²,

Shaffer³

et al. 2021

Int. J. Livest. Prod.

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The cultivation of hemp was prohibited due to its high content of the psychoactive substance Δ-9 tetrahydrocannabinol (THC). Regulatory changes from several countries allow the cultivation of hemp that permits plants and plant parts with less than 0.3% Δ-9 THC. The concern of the levels of THC still remains; therefore, testing hemp seed cake (HSC) contributes new information about the effect of this ingredient on livestock. The objective of this study was to evaluate the effect of HSC on feed intake, body weight (BW), egg production, eggs per hen housed (EHH), feed conversion ratio (FCR), and livability of laying hens. Eight hundred 30-week old laying hens were randomly distributed and fed four treatments for 19 weeks, no HSC (C0), 10% (H10), 20% (H20) and 30% (H30) of HSC replicated 8 times with 25 hens per replicate. Feed intake was not affected by the HSC supplementation. BWs were reduced across all treatments with significant lower impact on the HSC treatments, egg production, EHH and FCR were not consistently affected by HSC supplementation. The livability was within the normal range for the breed. The results of this study confirm that HSC supplementation in feed does not affect the performance of laying hens.

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Section: Discussionsupporting

confidence: 71%

Effect of dietary hemp seed cake on the performance of commercial laying hens

Kasula¹,

Solis²,

Shaffer³

et al. 2021

Int. J. Livest. Prod.

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“…The increase in TNF-α may be due to the secretion of CORT ( 48 ). It was recently reported that HS impaired egg production by inducing follicular cells apoptosis through producing ROS/MDA and activating the CORT/TNF-α pathways ( 49 ).…”

Section: Discussionmentioning

confidence: 99%

Effect of Organic Selenium-Enriched Yeast on Relieving the Deterioration of Layer Performance, Immune Function, and Physiological Indicators Induced by Heat Stress

et al. 2022

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Heat stress (HS) induces deleterious effects on the performance of laying hens and causes economic losses for poultry industry. This study was carried out to investigate the organic effect of selenium-enriched yeast (SY) on relieving the performance, immunity and physiological deterioration induced by heat stress in laying hens. A total of 324, 28-week-old, Hy-Line Brown commercial chicken layers were randomly distributed into 4 treatments according to a 2 × 2 factorial design, with 9 hens × 9 replicates per treatment (n = 81). From 30 to 34 weeks of age, layers were exposed to 2 temperature treatments (the HS treatment groups): a thermoneutral temperature at 24°C and a heat stress at 35°C. Layers were further assigned into the 2 subgroups according to dietary supplementation with organic selenium-enriched yeast (the SY treatment groups) at either 0 or 0.4 mg/kg diet. Results indicated that all the aspects of the layer performance during the experimental period were impaired by exposure to HS, while SY supplementation improved the layer performance in both the HS and non-HS layers. Intestinal villi disruptions and liver necrotic hepatocytes were observed in the layers exposed to HS, while villi integrity and hepatocytic normality were enhanced by SY treatment. A significant (P < 0.05) decrease in the total leukocyte count, sheep red blood cell (SRBC) antibody titer, and T- and B-lymphocyte proliferation along with an increase in the heterophils/lymphocytes (H/L) ratio were observed in the HS layers compared to non-HS layers. On the contrary, SY treatment significantly (P < 0.05) improved the immune function traits in both the HS layers and non-HS layers. Furthermore, the SY treatment plays an important role in mitigating the oxidative stress and inflammation induced by HS, displaying lower levels of plasma corticosterone, lipid peroxidation, interleukin-1β, and tumor necrosis factor-α in HS layers supplemented with SY compared to HS layers without SY supplementation. These results conclude that addition of SY to the diet of laying hens could be applied as a potential nutritional approach to relieve the deterioration effects of heat stress on the immunity, physiological status, and productive performance of laying hens.

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“…An upsurge in corticosterone as a response to HS causes muscle protein breakdown and provides amino acid substrates to liver gluconeogenesis that is responsible for energy supply (Ma et al, 2021). The rise in corticosterone levels might increase oxidative stress, induce cell death in follicular cells, leading to a decrease in follicle numbers and subsequently reducing egg production (Li G. M. et al, 2020). In layers, Allahverdi et al (2013) observed that high temperatures significantly decreased egg quality, egg weight, shell weight, egg specific gravity, and shell thickness.…”

Section: Heat Stressmentioning

confidence: 99%

Environmental Stress in Chickens and the Potential Effectiveness of Dietary Vitamin Supplementation

Akinyemi

Adewole

2021

Front. Anim. Sci.

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Environmental stressors can promote the vulnerability of animals to infections; it is therefore, essential to understand how stressors affect the immune system, the adaptive capacity of animals to respond, and effective techniques in managing stress. This review highlights scientific evidence regarding environmental stress challenge models and the potential effectiveness of vitamin supplementation. The major environmental stressors discussed are heat and cold stress, feed restriction, stocking density, and pollutants. Much work has been done to identify the effects of environmental stress in broilers and layers, while few involved other types of poultry. Studies indicated that chickens' performance, health, and welfare are compromised when challenged with environmental stress. These stressors result in physiological alterations, behavioral changes, decreased egg and meat quality, tissue and intestinal damage, and high mortalities. The application of vitamins with other nutritional approaches can help in combating these environmental stressors in chickens. Poultry birds do not synthesize sufficient vitamins during stressful periods. It is therefore suggested that chicken diets are supplemented with vitamins when subjected to environmental stress. Combination of vitamins are considered more efficient than the use of individual vitamins in alleviating environmental stress in chickens.

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Heat stress decreases egg production of laying hens by inducing apoptosis of follicular cells via activating the FasL/Fas and TNF-α systems

Cited by 39 publications

References 46 publications

Effect of dietary hemp seed cake on the performance of commercial laying hens

Effect of dietary hemp seed cake on the performance of commercial laying hens

Effect of Organic Selenium-Enriched Yeast on Relieving the Deterioration of Layer Performance, Immune Function, and Physiological Indicators Induced by Heat Stress

Environmental Stress in Chickens and the Potential Effectiveness of Dietary Vitamin Supplementation

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