Improving animal welfare status and meat quality through assessment of stress biomarkers: A critical review

Kumar, Pavan; Ahmed, Muideen Adewale; Abubakar, Abubakar Ahmed; Hayat, Muhammad Nizam; Kaka, Ubedullah; Ajat, Mokrish; Goh, Yong Meng; Sazili, Awis Qurni

doi:10.1016/j.meatsci.2022.109048

Cited by 38 publications

(32 citation statements)

References 195 publications

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“…The plasma CORT concentration and LDH activity as stress-sensitive indicators are widely employed to evaluate the pre-slaughter stress and fatigue levels of pigs. , As shown in Figure A,B, the CORT concentration and LDH activity in the TS group were remarkably higher than those in the CON group ( P < 0.05), and their partial eta square values which were reported as indices of effect size were 0.512 and 0.352, respectively. Compared with the CON group, the CORT concentration increased by 25.3% and the LDH activity increased by 17.5% in the TS group.…”

Section: Resultsmentioning

confidence: 99%

Effect of Pre-Slaughter Transport Stress on Protein S-Nitrosylation Levels of Pork during Postmortem Aging

Zhang

Zhou

et al. 2023

J. Agric. Food Chem.

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This study aimed to investigate the effect of pre-slaughter transport stress on the protein S-nitrosylation levels of pork during 0, 3, and 6 days of aging. Pigs (N = 16) were randomly selected and divided into two treatments: 3 h transport (transport stress, TS) and 3 h transport followed by 3 h resting (control, CON). Results showed that the TS group at 0 and 3 days presented a higher nitric oxide synthase (NOS) activity and neuronal NOS (nNOS) expression than the CON group (P < 0.05). Additionally, nNOS was not only abundantly localized in the membrane but also observed in small amounts in the cytoplasm. The immunoblot of overall S-nitrosylated protein showed that protein S-nitrosylation levels in the TS group were greater than in the CON group during postmortem aging (P < 0.05). This work can deliver novel insights into the mechanism of meat quality changes in response to pre-slaughter stress.

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Section: Resultsmentioning

confidence: 99%

Effect of Pre-Slaughter Transport Stress on Protein S-Nitrosylation Levels of Pork during Postmortem Aging

Zhang

Zhou

et al. 2023

J. Agric. Food Chem.

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“…As per Grandin and Vogel [ 66 ], the vision or smell of blood is not thought to cause distress unless the animal whose blood is present had been distressed during slaughter (e.g., he or she struggled and vocalized). Preslaughter handling had been established to affect animal welfare and meat quality [ 67 , 68 ].…”

Section: Resultsmentioning

confidence: 99%

“…Various stress factors affect the heart rate and blood glucose levels in goats due to the increased release of catecholamines and glucocorticoids. It facilitates increasing glucose production from glycogenolysis and gluconeogenesis required for preparing animals for the response to a stressor (fight or flight response) [ 67 , 70 ]. An increase in blood glucose concentration was also reported during stressful conditions (pasture and slaughter) in deer [ 71 ].…”

Section: Resultsmentioning

confidence: 99%

Electroencephalogram and Physiological Responses as Affected by Slaughter Empathy in Goats

Kumar

Abubakar

Ahmed

et al. 2023

Animals

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Recent advances in emotions and cognitive science make it imperative to assess the emotional stress in goats at the time of slaughter. The present study was envisaged to study the electroencephalogram and physiological responses as affected by slaughter empathy in goats. A total of 12 goats were divided into two groups viz., E-group (goats exposed to slaughter environment, n = 6) and S-group (goat slaughtered in front of E-group, n = 6). The electroencephalogram and physiological responses in male Boer cross goats (E-group) were recorded in a slaughterhouse in two stages viz., control (C) without exposure to the slaughter of conspecifics and treatment (T) while visualizing the slaughter of conspecifics (S—slaughter group). The exposure of the goat to the slaughter of a conspecific resulted in a heightened emotional state. It caused significant alterations in neurobiological activity as recorded with the significant changes in the EEG spectrum (beta waves (p = 0.000491), theta waves (p = 0.017), and median frequency MF or F50 (p = 0.002)). Emotional stress was also observed to significantly increase blood glucose (p = 0.031) and a non-significant (p = 0.225) increase in heart rate in goats. Thus, slaughter empathy was observed to exert a significant effect on the electric activity of neurons in the cerebrocortical area of the brain and an increase in blood glucose content.

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“…Stress causes a variety of physiological and biochemical changes in the body, which are used to assess the stress status of animals. Blood profiles, serum hormones, enzymes, and physiological conditions such as body temperature, heart rate, and respiration rate of animals are the most commonly used biomarkers of stress in animal production [1][2][3][4][5][6][7][8][9][10][11]. With prolonged exposure to various stress factors, stress immunodeficiency occurs in animals.…”

Section: Introductionmentioning

confidence: 99%

“…The search for effective pharmacocorrectors-antioxidants and/or the establishment of antioxidant properties in known drugs starts from the preclinical stage, where oxidative stress in laboratory animals is modeled by introducing xenobiotics, exposure to hypo-and hyperthermia, ionizing and ultraviolet radiation, etc. [14,15,8,11]. The novice pharmacological researcher faces the question of choosing an adequate model of oxidative stress [16].…”

Section: Introductionmentioning

confidence: 99%

Substantiation of the choice of the model for the formation of oxidative stress in preclinical studies

et al. 2023

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At the preclinical stage, a comparative assessment of various models of the formation of oxidative stress by exposure to high and low temperatures, ultraviolet irradiation, and the influence of a low-frequency alternating magnetic field was carried out. Exposure to laboratory animals was carried out daily for 21 days. It has been established that the modeling of oxidative stress by exposure to ultraviolet rays on rats allows, by the end of the first week of the experiment, to induce an increase in the intensity of lipid peroxidation processes with the accumulation of lipid peroxidation products by 48-61% and a decrease in the activity of antioxidant components by 31-33% in comparison with the control, which exceeds similar parameters on day 7 in models of hypothermia, hyperthermia and magnetic induction. Cold exposure in rats is accompanied by a more pronounced shift in the antioxidant status towards the prooxidant side by the end of the third week, which is confirmed by an increase in the concentration of lipid peroxidation products by 45-67% and a decrease in the level of components of the antioxidant system by 28-37% relative to the control. In general, the prooxidant effect in vivo of all the studied effects was confirmed, which we recommend as experimental models for the formation of oxidative stress at the preclinical stage, substantiating in the work the possibility of using each effect depending on the purpose of the pharmacological study.

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Improving animal welfare status and meat quality through assessment of stress biomarkers: A critical review

Cited by 38 publications

References 195 publications

Effect of Pre-Slaughter Transport Stress on Protein S-Nitrosylation Levels of Pork during Postmortem Aging

Effect of Pre-Slaughter Transport Stress on Protein S-Nitrosylation Levels of Pork during Postmortem Aging

Electroencephalogram and Physiological Responses as Affected by Slaughter Empathy in Goats

Substantiation of the choice of the model for the formation of oxidative stress in preclinical studies

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