Genotypes of 5′-flanking region in porcine heat-shock protein 70.2 gene affect backfat thickness and growth performance in Duroc boars

Huang, San-Yuan; Lee, W.C.; Chen, M.Y.; Wang, S.C.; Huang, Changhua; Tsou, H. L.; Lin, E.-C.

doi:10.1016/s0301-6226(03)00141-6

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…Unfortunately, baseline (pre thermal stress) samples were not obtained, and it would have been interesting to compare the tissue HSP expression pre-and post-heat, as this may provide a link to animals that are more sensitive to elevated temperatures and are thus more likely to exhibit high rigor temperature and other meat quality defects, and vice versa. This has been demonstrated in pigs, in which polymorphisms in the HSP70 gene have been shown to alter meat quality measures such as backfat thickness (Huang et al 2004). Together, the findings from this experiment and other literature indicate that there are differences in tissue, species and individual animal HSP gene expression for reasons that are not clear.…”

Section: Discussionsupporting

confidence: 57%

Dietary betaine supplementation has energy-sparing effects in feedlot cattle during summer, particularly in those without access to shade

DiGiacomo¹,

Warner

Leury³

et al. 2014

Anim. Prod. Sci.

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Abstract. Dietary betaine supplementation improves water retention in steers and may influence lean-tissue deposition, while also acting as an osmolyte to help regulate cellular osmotic balance. This study investigated the interactions between shade and dietary betaine on carcass characteristics, tissue enzyme activity and gene expression in 48 feedlot steers during summer. Steers were randomly allocated to a 4 · 2 factorial design with the factors being dietary betaine (0, 10, 20 or 40 g) and shade (with and without shade) for 120 days. Tissue samples were obtained at slaughter and analysed for gene expression of heat shock proteins 70 and 90 (HSP70/90) and expression of heat shock factor 1 (HSF1), and enzyme activity of fatty acid synthase (FAS) and glycerol-6-phosphate dehydrogenase (G6PDH). Carcasses were evaluated for quality. Carcass weight at slaughter was not altered by shade (P = 0.18) but tended to be increased by dietary betaine (306 v. 314 kg, P = 0.09). The P8 backfat was not altered by shade (P = 0.43) or dietary betaine (P = 0.32), although there was a within dietary betaine effect whereby P8 backfat tended to be greater in steers fed 10 g compared with 40 g betaine/day (17.4 v. 14.5 mm, P = 0.06). Muscle pH at 1 h (5.97 v. 6.03, P = 0.01) and 2 h (5.73 v. 5.80, P = 0.04) post-slaughter was higher in shaded steers, and muscle pH at 1 h post-slaughter was higher in steers fed 10 or 20 g than those fed 40 g betaine/day (6.03 v. 6.03 v. 5.95, P = 0.005). Gene expression was not altered by betaine, while adipose tissues expressed more of each gene than muscle (P < 0.001). The mRNA expression of HSF1 and HSP90 was influenced by a shade · betaine interaction, although the direction of this interaction was irregular (P = 0.03 and 0.03, respectively). Adipose tissue FAS and G6PDH enzyme activity was unaffected by shade and betaine. The results of this study indicate that betaine supplementation may be a successful carcass modifier in growing feedlot steers during summer. Provision of shade during summer may reduce the rate of pH decline in the first 2 h after slaughter and reduce the risk of high rigor temperature.

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Section: Discussionsupporting

confidence: 57%

Dietary betaine supplementation has energy-sparing effects in feedlot cattle during summer, particularly in those without access to shade

DiGiacomo¹,

Warner

Leury³

et al. 2014

Anim. Prod. Sci.

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“…This may help to reduce high rigor temperature and other meat quality defects associated with elevated carcass temperature post-slaughter. For example, in Duroc boars, differences in the genotype at the HSP72 gene appear to influence backfat deposition under different environmental temperatures, although this appears to be most prominent in cooler months (Huang et al 2004).…”

Section: Heat Shock Proteins and Thermo-tolerancementioning

confidence: 99%

Potential nutritional strategies for the amelioration or prevention of high rigor temperature in cattle – a review

DiGiacomo¹,

Leury²,

Dunshea³

2014

Anim. Prod. Sci.

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Abstract. Environmental conditions influence animal production from an animal performance perspective and at the carcass level post-slaughter. High rigor temperature occurs when the animal is hyperthermic pre-slaughter, and this leads to tougher meat. Hyperthermia can result from increased environmental temperature, exercise, stress or a combination of these factors. Consumer satisfaction with beef meat is influenced by the visual and sensory traits of the product when raw and cooked, with beef consumers commonly selecting tenderness of the product as the most important quality trait. High rigor temperature leads to a reduction in carcass and eating quality. This review examines some possible metabolic causes of hyperthermia, with focus on the importance of adipose tissue metabolism and the roles of insulin and leptin. Potential strategies for the amelioration or prevention of high rigor temperature are offered, including the use of dietary supplements such as betaine and chromium, anti-diabetic agents such as thiazolidinediones, vitamin D, and magnesium (Mg) to provide stress relief.

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“…The performance test is described in detail by Huang et al (2004). Briefly, the performance test began at a body weight of 37.3 ± 0.1 kg, and ended when the boars reached a body weight of 110 ± 2 kg.…”

Section: Source Of Animals and Data Collectionmentioning

confidence: 99%

Association of polymorphism in the alpha (1,2) fucosyltransferase gene with growth performance in two Western pig breeds in Taiwan

et al. 2008

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Genotypes of 5′-flanking region in porcine heat-shock protein 70.2 gene affect backfat thickness and growth performance in Duroc boars

Cited by 4 publications

References 22 publications

Dietary betaine supplementation has energy-sparing effects in feedlot cattle during summer, particularly in those without access to shade

Dietary betaine supplementation has energy-sparing effects in feedlot cattle during summer, particularly in those without access to shade

Potential nutritional strategies for the amelioration or prevention of high rigor temperature in cattle – a review

Association of polymorphism in the alpha (1,2) fucosyltransferase gene with growth performance in two Western pig breeds in Taiwan

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