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玉米赤霉烯酮对体外培养鸡脾脏淋巴细胞凋亡的影响

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  • 1. 四川农业大学动物医学院, 成都 611130;
    2. 西南科技大学, 绵阳 621010
李欣虹(1997-),女,四川凉山人,本科生,从事动物中毒病理研究。E-mail:1871426174@qq.com

收稿日期: 2018-01-05

  网络出版日期: 2018-08-18

基金资助

国家自然科学基金项目(31402269);四川农业大学2018年本科生科研兴趣培养计划项目

Effects of Zearalenone on Apoptosis of Chicken Splenic Lymphocytes in Vitro

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  • 1. College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, China;
    2. Southwest University of Science and Technology, Mianyang 621010, China

Received date: 2018-01-05

  Online published: 2018-08-18

摘要

本试验旨在研究玉米赤霉烯酮(ZEA)对体外培养鸡脾脏淋巴细胞凋亡的影响。选用40~60日龄健康的伊莎公鸡,无菌条件下取脾脏,制备淋巴细胞悬液。ZEA染毒浓度为0(对照)、0.10、0.40、1.60、6.25和25.00 μg/mL,染毒48 h后检测体外培养鸡脾脏淋巴细胞凋亡率、坏死率、细胞线粒体膜电位、细胞内活性氧(ROS)含量以及B淋巴细胞瘤-2(Bcl-2)、Bcl-2相关X蛋白(Bax)、Bak-1、p53及半胱氨酸天冬氨酸蛋白酶-3(caspase-3)mRNA表达量及细胞培养液上清中上述相应凋亡基因蛋白含量。结果显示:与对照组比较,ZEA染毒导致鸡脾脏淋巴凋亡率、坏死率、ROS含量、细胞培养上清液中p53、Bax、Bak-1及caspase-3的含量以及细胞内p53、BaxBak-1及caspase-3的mRNA表达量显著或极显著提高(P<0.05或P<0.01),且随毒素浓度升高而升高;而ZEA组细胞线粒体膜电位和上清液Bcl-2含量却极显著低于对照组(P<0.01)。由此可知,ZEA染毒可促进体外培养鸡脾脏淋巴细胞凋亡,且呈剂量依赖性。

本文引用格式

李欣虹, 郑若愚, 辜彦霏, 陶思邑, 任志华, 王亚超, 邓俊良 . 玉米赤霉烯酮对体外培养鸡脾脏淋巴细胞凋亡的影响[J]. 动物营养学报, 2018 , 30(8) : 3285 -3292 . DOI: 10.3969/j.issn.1006-267x.2018.08.048

Abstract

This study was conducted to investigate the effects of zearalenone (ZEA) on apoptosis of chicken splenic lymphocytes in vitro. The spleens of some healthy Isabel roosters of 40 to 60 days of age were taken under sterile condition and the lymphocyte suspensions were prepared. Chicken splenic lymphocytes were treated with 0 (control), 0.10, 0.40, 1.60, 6.25 and 25.00 μg/mL ZEA for 48 h in vitro, and the apoptosis rate, necrotic rate, cell mitochondria membrane potential, intracellular reactive oxygen species (ROS) content and the mRNA expression levels of B lymphocytoma-2 (Bcl-2), Bcl-2 associated X protein (Bax), Bak-1, p53 and caspase-3 as well as their protein contents in the supernatant were measured. The results showed that compared with the control group, ZEA significantly or extremely significantly increased the apoptosis rate, necrotic rate, ROS content, contents of p53, Bax, Bak-1 and caspase-3 in the supernatant and the mRNA expression levels of intracellular p53, Bax, Bak-1 and caspase-3 (P<0.05 or P<0.01), which were higher and higher with ZEA concentration increasing. Whereas the mitochondria membrane potential and Bcl-2 content in the supernatant were extremely decreased in ZEA groups compared with the control group (P<0.01). These results suggest that ZEA induces apoptosis of chicken splenic lymphocytes in a dose-dependent manner.

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