1 材料与方法
1.1 伦理声明
1.2 试验材料
1.3 试验设计
表1 基础饲粮组成及营养水平(饲喂基础)Table 1 Composition and nutrient levels of the basal diet (as-fed basis)% |
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1)预混料为每千克饲粮提供 Premix provided the following per kilogram of the diet:VA 5 512 IU,VD3 2 200 IU,VE 30 IU,VK3 4 mg,VB12 0.01 mg,核黄素 riboflavin 5.22 mg,D-泛酸钙 D-calcium pantothenate 20 mg,烟酸 nicotinic acid 26 mg,Mn (MnSO4·H2O) 40 mg,Fe (FeSO4·H2O) 75 mg,Zn (ZnSO4·7H2O) 75 mg,Cu (CuSO4·5H2O) 100 mg,I (CaI2) 0.3 mg,Se (Na2SeO3) 0.3 mg。 2)粗蛋白质、钙、总磷为实测值,分别参考GB/T 6432—2018、GB/T 6436—2018、GB/T 6437—2018测定;其余营养水平为计算值,均参照《中国饲料成分及营养价值表(2023年第34版)》计算。CP, Ca and TP were determined values, analyzed according to GB/T 6432—2018, GB/T 6436—2018, and GB/T 6437—2018, respectively. The remaining nutrient levels were calculated values, all calculated with reference to the China Feed Composition and Nutritional Value Table (34th edition, 2023). |
1.4 样品采集及处理
1.5 测定指标和方法
1.5.1 苏木精-伊红(HE)染色分析肝脏组织形态与结构
1.5.2 普鲁士蓝染色分析肝脏组织铁离子沉积情况
1.5.3 肝细胞铁死亡信号通路关键基因mRNA相对表达量测定
表2 引物序列Table 2 Primer sequences |
| 基因 Genes | 引物序列 Primer sequence (5'—3') | 登录号 Accession number | 产物大小 Product size/bp | ||||
|---|---|---|---|---|---|---|---|
| 铁离子外排蛋白1 FPN1 | F:GGTTCTTACTTCCTGCTATATC R:ACTGGTCAATCCTTCGTATT | XM_003483701.4 | 167 | ||||
| 铁反应元件结合蛋白2 IREB2 | F:CGGTATGCTCACTTATCTCATCC R:CTTACAGGTCTCTTCCACAACAC | NM_001167781.1 | 154 | ||||
| 谷胱甘肽过氧化物酶4 GPX4 | F:CTGTTCCGCCTGCTGAA R:ACCTCCGTCTTGCCTCAT | NM_214407.1 | 218 | ||||
| 溶质载体家族7成员11 SLC7A11 | F:GCCTTGTCCTATGCTGAGTTG R:GTTCCAGAATGTAGCGTCCAA | XM_021101587.1 | 178 | ||||
| 转铁蛋白 TF | F:GATAAGTTCCACGCCAAGA R:GGTTCTCATAGGTGTCATCC | NM_001244653.1 | 126 | ||||
| 转铁蛋白受体1 TFR1 | F:GATAAGTTCCACGCCAAGA R:GGTTCTCATAGGTGTCATCC | XM_003124374.5 | 277 | ||||
| β-肌动蛋白 β-actin | F:TGCGGGACATCAAGGAGAAG R:AGTTGAAGGTGGTCTCGTGG | XM_021086047.1 | 216 |
1.6 统计分析
2 结果
2.1 Que对DON诱导的仔猪肝脏组织形态和结构的影响
图1 Que对DON诱导的仔猪肝脏组织形态和结构的影响a:炎性细胞浸润 inflammatory cell infiltration;b:肝细胞核溶解 hepatocyte karyolysis;c:肝细胞核固缩 hepatocyte karyopyknosis;d:肝细胞空泡化 hepatocyte vacuolization。对照组肝脏组织结构正常;Que组肝脏组织结构正常;DON组肝细胞索紊乱,大量肝细胞坏死;DON+Que组肝细胞索轻度紊乱,炎性细胞减少。 Fig.1 Effects of Que on liver morphology and structure of DON-induced piglets a: inflammatory cell infiltration; b: hepatocyte karyolysis; c: hepatocyte karyopyknosis; d: hepatocyte vacuolization. The liver tissue structure in the control group was normal; the Que group showed normal liver tissue structure; the DON group exhibited disordered hepatic cords with extensive hepatocyte necrosis; the DON+Que group displayed mildly disorganized hepatic cords and reduced inflammatory cell infiltration. |
2.2 Que对DON诱导的仔猪肝脏组织铁离子沉积的影响
图2 Que对DON诱导的仔猪肝脏组织铁离子沉积的影响对照组蓝染颗粒呈片状,数量正常;Que组蓝染颗粒呈片状,数量正常;DON组蓝染颗粒(黑色箭头所示)呈片状,增多;DON+Que组蓝染颗粒呈片状,减少。 Fig.2 Effects of Que on iron ion deposition in liver tissue of DON-induced piglets In the control group, the blue granules appeared sheet-like and were normal in quantity; the Que group showed sheet-like blue granules with a normal quantity; the DON group exhibited an increased amount of sheet-like blue granules (as indicated by the black arrow); the DON+Que group displayed a decreased amount of sheet-like blue granules. |
2.3 Que对DON诱导的仔猪肝细胞铁死亡信号通路关键基因表达的影响
表3 Que对DON诱导的仔猪肝细胞铁死亡信号通路关键基因表达的影响Table 3 Effects of Que on expression of key genes of ferroptosis signaling pathway in hepatocyte of DON-induced piglets |
| 项目 Items | 组别Groups | P值P-value | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 对照Control | Que | DON | Que+DON | DON | Que | 互作效应 Interaction effect | ||||||||||
| 铁离子外排蛋白1 FPN1 | 1.00±0.19a | 1.14±0.36ab | 1.43±0.24b | 1.12±0.20ab | 0.067 | 0.418 | 0.046 | |||||||||
| 铁反应元件结合蛋白2 IREB2 | 1.00±0.21 | 0.93±0.12 | 0.67±0.11 | 0.85±0.27 | 0.015 | 0.503 | 0.104 | |||||||||
| 谷胱甘肽过氧化物酶4 GPX4 | 1.00±0.21b | 0.93±0.06b | 0.67±0.12a | 0.87±0.22ab | 0.009 | 0.373 | 0.057 | |||||||||
| 溶质载体家族7成员11 SLC7A11 | 1.00±0.51a | 1.35±0.29ab | 1.91±0.65b | 1.15±0.38a | 0.082 | 0.306 | 0.010 | |||||||||
| 转铁蛋白 TF | 1.00±0.12a | 1.21±0.12ab | 1.69±0.29c | 1.28±0.12b | 0.001 | 0.186 | 0.001 | |||||||||
| 转铁蛋白受体1 TFR1 | 1.00±0.10a | 1.25±0.20ab | 2.35±0.42c | 1.56±1.18b | 0.001 | 0.016 | 0.001 | |||||||||
DON:呕吐毒素;Que:槲皮素。同行数据肩标无字母或相同字母表示差异不显著(P>0.05),不同字母表示差异显著(P<0.05)。 | |
DON: deoxynivalenol; Que: quercetin. In the same row, values with no letter or the same letter superscripts mean no significant difference (P>0.05), while with different letter superscripts mean significant difference (P<0.05). |


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