浙江农业学报 ›› 2021, Vol. 33 ›› Issue (11): 2017-2025.DOI: 10.3969/j.issn.1004-1524.2021.11.03

• 动物科学 • 上一篇    下一篇

维生素C对β-伴大豆球蛋白诱导的仔猪肠上皮细胞炎性损伤的保护作用

夏江英(), 杨菊, 宋天浩, 庞莲凤, 叶婷, 任志华, 邓俊良*()   

  1. 四川农业大学 动物医学院,四川 成都 611130
  • 收稿日期:2020-12-29 出版日期:2021-11-25 发布日期:2021-11-26
  • 通讯作者: 邓俊良
  • 作者简介:*邓俊良,E-mail: dengjl213@126.com
    夏江英(1995—),女,四川南充人,硕士研究生,研究方向为动物营养代谢病。E-mail: 962268356@qq.com
  • 基金资助:
    国家“十三五”重点研发计划(2016YFD0501204)

Protective effect of vitamin C in piglet intestinal epithelial cells inflammatory injury induced by β-conglycinin

XIA Jiangying(), YANG Ju, SONG Tianhao, PANG Lianfeng, YE Ting, REN Zhihua, DENG Junliang*()   

  1. College of Veterinary Medicine, Sichuan Agricultural University,Chengdu 611130, China
  • Received:2020-12-29 Online:2021-11-25 Published:2021-11-26
  • Contact: DENG Junliang

摘要:

为分析不同浓度维生素C(vitamin C,VC)对β-伴大豆球蛋白(7S)诱导的仔猪肠上皮细胞(IPEC-J2)炎性损伤的保护作用,取对数生长期的IPEC-J2用于试验,随机分为对照组、7S模型组(5 mg·mL-1 7S)和VC(25、50、100、200、400、600、800、1 000 μmol·L-1)保护组。细胞培养24 h后采用CCK-8法检测细胞存活率,倒置显微镜观察细胞形态学变化,ELISA法检测细胞上清液中LDH、ALP、DAO、IFABP1含量和IL-1β、IL-6、TNF-α、IL-4、IL-10的分泌水平,用qRT-PCR法检测IL-1βIL-6、TNF-αIL-4和IL-10 mRNA相对表达量。结果显示:7S可显著(P<0.01)降低IPEC-J2活力、破坏细胞膜完整性,上调细胞促炎性因子和下调抗炎因子的产生;与7S模型组相比,同时添加7S和VC的试验组细胞活力增加,细胞上清液中LDH、ALP、DAO、IFABP1含量显著(P<0.01)降低,促炎因子IL-1β、IL-6、TNF-α分泌水平降低,抗炎因子IL-4和IL-10的分泌水平升高。因此,不同浓度VC均可保护由7S诱导引起的仔猪肠上皮细胞损伤,100 μmol·L-1 VC的修复和保护作用最佳。

关键词: 维生素C, β-伴大豆球蛋白, 仔猪肠上皮细胞, 膜完整性, 细胞因子

Abstract:

To investigate protective effects of different concentrations of vitamin C (VC) on inflammatory injury of piglet intestinal epithelial cells (IPEC-J2) induced by β-conglycinin (7S). IPEC-J2 in logarithmic growth phase were used for test. The cells were randomly divided into control group, 7S model group (5 mg·mL-1 7S), and VC(25, 50, 100, 200, 400, 600, 800, 1 000 μmol·L-1)protected groups.After cells were cultured for 24 h, cell viability was assessed by CCK-8 assay and morphological changes of cells were observed by an inverted microscope. Contents of LDH, ALP, DAO, IFABP1, IL-1β, IL-6, TNF-α, IL-4 and IL-10 in the cell supernatant were detected by ELISA assay. The relative expression of IL-1β, IL-6, TNF-α,IL-4 and IL-10 mRNA were detected by qRT-PCR. The results showed that 7S significantly (P<0.01) reduced the viability of IPEC-J2 and destroyed the integrity of cell membranes. 7S also elevated pro-inflammatory and decreased anti-inflammatory factors in cells.Compared with 7S model group, cell viability in the test group added with 7S and VC at the same time was significantly increased, and contents of LDH, ALP, DAO, IFABP1 in cell supernatant were significantly (P<0.01) reduced. Compared with 7S model group, VC protection groups reduced the secretion levels of cell pro-inflammatory factors IL-1β, IL-6 and TNF-α, and increased the secretion levels of anti-inflammatory factors IL-4 and IL-10. Therefore, various doses of VC protected against intestinal epithelial cell injury in piglets induced by 7S, and 100 μmol·L-1 VC had the best repair and protection effect on 7S injured IPEC-J2.

Key words: vitamin C, β-conglycinin, piglet intestinal epithelial cells, membrane integrity, cytokines

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