白术多糖通过Toll样受体4/核因子-κB信号通路调控雏鸡脾脏淋巴细胞免疫功能

被引：22

作者：

李婉雁 ^{[1
,2
]}

曹楠 ^{[1
,2
]}

田允波 ^{[1
,2
]}

相雪莲 ^{[1
,2
]}

李冰心 ^{[1
,2
]}

黄运茂 ^{[1
,2
]}

许丹宁 ^{[1
,2
]}

机构：

[1] 仲恺农业工程学院动物科技学院

[2] 广东省水禽健康养殖重点实验室

来源：

动物营养学报 | 2019年 / 31卷 / 11期

关键词：

白术多糖; 脾脏淋巴细胞; RNA干扰; Toll样受体4; 核因子-κB;

D O I：

暂无

中图分类号：

S853.7 [中兽医药物学];

学科分类号：

090604 [动物药学];

摘要：

本试验旨在研究白术多糖(PAMK)对雏鸡脾脏淋巴细胞免疫功能的影响及可能的调控机制。体外分离培养21日龄雏鸡脾脏淋巴细胞,以siRNA引物转染淋巴细胞干扰Toll样受体4(TLR4)基因的表达,在此基础上用浓度为12.5 mg/L的PAMK处理转染和非转染细胞,36 h后检测TLR4及其信号通路下游基因[髓样分化因子88(MyD88)、核因子-κB (NF-κB)抑制物的激酶(IKK)、NF-κB抑制蛋白(IκB)]和细胞因子[白细胞介素-2(IL-2)、白细胞介素-4(IL-4)、γ-干扰素(IFN-γ)、脂多糖诱导的肿瘤坏死因子-α(LITAF)]的mRNA表达量,并以凝胶迁移试验(EMSA)方法检测淋巴细胞核蛋白中NF-κB的含量。结果显示:PAMK可显著提高淋巴细胞中TLR4及其信号通路下游基因IKK、IκB与细胞因子IL-2、LITAF的mRNA表达量(P<0.05),同时可显著提高转染淋巴细胞中TLR4的mRNA表达量(P<0.05);此外,PAMK还可不同程度地促进转染淋巴细胞中1型辅助性T细胞(Th1)分泌的细胞因子[IL-2(P>0.05)、IFN-γ(P<0.05)、LITAF(P>0.05)]的表达,对2型辅助性T细胞(Th2)分泌的细胞因子(IL-4)的表达无显著促进作用(P>0.05); EMSA结果显示PAMK能促进转染和非转染淋巴细胞内NF-κB入核,使核蛋白中NF-κB的含量显著升高(P <0. 05)。综上所述,PAM K可活化TLR4/NF-κB信号通路,促进相关基因表达,最终使NF-κB进入细胞核调控细胞因子的转录水平,进而调控雏鸡脾脏淋巴细胞免疫功能。

引用

页码：5192 / 5201

页数：10

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