1 硒对畜禽肉品质的影响
图1 硒在肌肉中的作用Se:硒 selenium;Small intestine:小肠;Albumin:白蛋白;Activates antioxidant enzymes:激活抗氧化酶;Improves meat quality:改善肉质;Antioxidant:抗氧化;Prevents injury:预防损伤;Decreases L* value, b* value, drip loss, shearing force, and cooking loss:降低亮度值、黄度值、滴水损失、剪切力和蒸煮损失;Increases pH and a* value:提高pH和红度值。 Fig.1 Function of selenium in muscles |
1.1 pH
1.2 滴水损失
1.3 蒸煮损失
1.4 剪切力
1.5 肉色
2 硒影响畜禽肉品质的作用机制
2.1 硒对肌肉抗氧化功能的调控
图2 硒影响肌肉抗氧化功能的调控通路Se:硒 selenium;Muscle cell apoptosis:肌细胞凋亡;Cystine:胱氨酸;Ferroptosis:铁死亡;Nrf2:核因子E2相关因子2 nuclear factor E2-related factor 2;Keap1:Kelch样ECH相关蛋白1 Kelch-like ECH associated protein 1;ARE:抗氧化反应元件 antioxidant response element;HO1:血红素氧合酶1 heme oxygenase 1;NQO1:NAD(P)H醌氧化还原酶1 NAD(P)H quinone oxidoreductase 1;GPX1:谷胱甘肽过氧化物酶1 glutathione peroxidase 1;GPX:谷胱甘肽过氧化物酶 glutathione peroxidase;T-SOD:总超氧化物歧化酶 total superoxide dismutase;ROS:活性氧 reactive oxygen species;Trxr1:硫氧还蛋白还原酶1 thioredoxin reductase 1;Cys:半胱氨酸 cysteine;GCL:谷氨酸半胱氨酸连接酶 glutamate cysteine ligase;Glu:谷氨酸 glutamic acid;γ-GC:γ-谷氨酰半胱氨酸 γ-glutamylcysteine;GSS:谷胱甘肽合成酶 glutathione synthetase;Gly:甘氨酸 glycine;GSH:谷胱甘肽 glutathione:NADPH:还原型烟酰胺腺嘌呤二核苷酸磷酸 reduced nicotinamide adenine dinucleotide phosphate;NADP+:氧化型烟酰胺腺嘌呤二核苷磷酸 oxidized nicotinamide adenine dinucleotide phosphate;GR:谷胱甘肽还原酶 glutathione reductase;GSSG:氧化型谷胱甘肽 oxidized glutathione;GPX4:谷胱甘肽过氧化物酶4 glutathione peroxidase 4;SEOH:硒酸 selenic acid;SEH:硒醇 selenol;PLOOH:磷脂氢过氧化物 phospholipid hydroperoxide;PLOH:磷脂醇 phosphatidylinositol。 Fig.2 Regulatory pathways of selenium affecting muscle antioxidant function |
2.2 硒对糖和脂代谢的调控
图3 硒影响糖和脂代谢的调控通路extracellular:细胞外;plasma membrane:浆膜;Nucleus:细胞核;Intracellular:细胞内;Insulin:胰岛素;Se:硒 selenium;citric acid:柠檬酸;Malonyl-CoA:丙二酰辅酶A;IR:胰岛素受体 insulin receptor;IRS:胰岛素受体底物 insulin receptor substrate;PI3K:磷脂酰肌醇3激酶 phosphatidylinositol 3 kinase;PDK1:3-磷酸肌醇依赖性蛋白激酶1 3-phosphoinositide-dependent protein kinase 1;mTORC2:哺乳动物雷帕霉素靶蛋白复合体2 mammalian target of rapamycin complex 2;PIP2:磷脂酰肌醇二磷酸 phosphatidylinositol 4,5-bisphosphate;PIP3:磷脂酰肌醇三磷酸 phosphatidylinositol 3,4,5-trisphosphate;AS160:160 ku的蛋白激酶B底物 Akt substrate of 160 ku;GLUT4:葡萄糖转运体4 glucose transporter 4;FoxO1:叉头盒蛋白O1 forkhead box O1;PGC-1α:过氧化物酶体增殖物激活受体γ共激活因子-1α peroxisome proliferators-activated receptor coactivator-1α;GSK3β:糖原合成酶激酶3β glycogen synthase kinase 3β;ACC:乙酰辅酶A羧化酶 acetyl-CoA carboxylase;AKT:蛋白激酶B protein kinase B;CoA:辅酶A coenzyme A;G6Pase:葡萄糖-6-磷酸酶 glucose-6-phosphatase;PEPCK:磷酸烯醇式丙酮酸碳羧化酶 phosphoenolpyruvate carboxykinase;AMPK:单磷酸腺苷活化蛋白激酶 AMP-activated protein kinase;ACLY:ATP柠檬酸裂解酶 ATP citrate lyase。 Fig.3 Regulatory pathways of selenium affecting carbohydrate and lipid metabolism |
3 富硒肉的生产和优势
3.1 富硒肉的生产
表1 富硒肉的生产方法Table 1 Production methods of selenium-enriched meat |
| 动物 Animals | 硒源 Selenium sources | 硒添加水平 Selenium supplemental level/(mg/kg) | 试验期 Test period/d | 肌肉硒含量 Muscle selenium content/(mg/kg) | 参考文献 References |
|---|---|---|---|---|---|
| 肉牛Cattle | 亚硒酸钠 | 0.20 | 60 | 0.34 | [17] |
| 肉羊Sheep | 亚硒酸钠 | 0.80 | 42 | 0.53 | [34] |
| 猪Pigs | 亚硒酸钠 | 0.30 | 35 | 0.81 | [58] |
| 肉鸡Broilers | 酵母硒 | 0.50 | 56 | 0.43 | [28] |
| 肉羊Sheep | 酵母硒 | 0.50 | 90 | 1.09 | [59] |
| 肉牛Cattle | 酵母硒 | 0.20 | 60 | 0.37 | [17] |
| 肉鸡Broilers | 纳米硒 | 0.30 | 42 | 0.20 | [43] |
| 肉鸡Broilers | 纳米硒 | 0.30、0.50、1.00、2.00 | 42 | 0.19、0.26、0.43、0.46 | [60] |

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