

畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (11): 5706-5720.doi: 10.11843/j.issn.0366-6964.2025.11.029
马月1(
), 苗宇航1,2(
), 丁涛1,2, 辛杰1,2, 马文妍1,2, 李雅楠1,2,*(
), 周学章1,2,*(
), 杜军1,2,*(
)
收稿日期:2024-10-08
出版日期:2025-11-23
发布日期:2025-11-27
通讯作者:
李雅楠,周学章,杜军
E-mail:2459892015@qq.com;myh6943@126.com;liyanan@nxu.cn;zhouxuezhang@nxu.edu.cn;dujun@nxu.edu.cn
作者简介:马月(2001-),女,回族,宁夏吴忠人,本科生,主要从事生物科学基础研究,E-mail: 2459892015@qq.com马月与苗宇航为同等贡献作者
基金资助:
MA Yue1(
), MIAO Yuhang1,2(
), DING Tao1,2, XIN Jie1,2, MA Wenyan1,2, LI Yanan1,2,*(
), ZHOU Xuezhang1,2,*(
), DU Jun1,2,*(
)
Received:2024-10-08
Online:2025-11-23
Published:2025-11-27
Contact:
LI Yanan, ZHOU Xuezhang, DU Jun
E-mail:2459892015@qq.com;myh6943@126.com;liyanan@nxu.cn;zhouxuezhang@nxu.edu.cn;dujun@nxu.edu.cn
摘要:
旨在研究重组克柔念珠菌14-3-3(rCK14-3-3)蛋白诱导奶牛乳腺上皮细胞(MAC-T)铁死亡的特征,为揭示克柔念珠菌毒力因子损伤奶牛乳腺上皮细胞的机制提供理论依据。采用CCK-8法筛选rCK14-3-3蛋白对MAC-T的最适作用浓度和时间;将奶牛乳腺上皮细胞分为空白对照组、阳性对照组(10 μmol·L-1 Erastin)、试验组Ⅰ(不同浓度rCK14-3-3蛋白(25、50、75 μg·mL-1))、试验组Ⅱ(不同浓度rCK14-3-3蛋白(25、50、75 μg·mL-1)+铁死亡抑制剂Ferrostatin-1(20 μmol·L-1))、试验组Ⅲ(不同浓度rCK14-3-3蛋白(25、50、75 μg·mL-1)+Nrf2特异性抑制剂ML385(25 μmol·L-1)),透射电镜检测细胞铁死亡形态学特征;Western blot检测rCK14-3-3诱导MAC-T铁死亡Nrf2-SLC7A11/GPX4信号通路蛋白表达水平;免疫荧光法检测谷胱甘肽过氧化物酶4(GPX4)、活性氧(ROS)及线粒体膜电位(JC-1)的表达水平;比色法检测MAC-T中乳酸脱氢酶(LDH)、丙二醛(MDA)、谷胱甘肽(GSH)和亚铁离子(Fe2+)的含量。结果发现,与空白对照组相比,阳性对照组、试验组Ⅰ出现明显铁死亡特征;阳性对照组、试验组Ⅰ Nrf2、GPX4、SLC7A11蛋白表达水平及GSH含量显著下降(P < 0.05),ROS、MDA、Fe2+含量显著上升,JC-1含量显著下降(P < 0.05),而与试验组Ⅰ相比,试验组Ⅱ Nrf2、GPX4、SLC7A11蛋白表达水平及GSH含量显著上升(P < 0.05),ROS、MDA、Fe2+含量显著下降,JC-1含量显著上升(P < 0.05);试验组Ⅲ Nrf2、GPX4、SLC7A11蛋白表达水平及GSH含量显著下调(P < 0.05),ROS、MDA、Fe2+含量显著上升,JC-1含量显著下降(P < 0.05)。本研究表明,rCK14-3-3蛋白可通过Nrf2-SLC7A11/GPX4信号通路诱导MAC-T发生铁死亡,为今后靶向干预铁死亡防治念珠菌性奶牛乳房炎提供了数据支持。
中图分类号:
马月, 苗宇航, 丁涛, 辛杰, 马文妍, 李雅楠, 周学章, 杜军. 重组克柔念珠菌14-3-3蛋白诱导奶牛乳腺上皮细胞铁死亡的信号通路分析[J]. 畜牧兽医学报, 2025, 56(11): 5706-5720.
MA Yue, MIAO Yuhang, DING Tao, XIN Jie, MA Wenyan, LI Yanan, ZHOU Xuezhang, DU Jun. Signaling Pathway Analysis of Ferroptosis Induced by Recombinant Candida krusei 14-3-3 Protein in Bovine Mammary Epithelial Cells[J]. Acta Veterinaria et Zootechnica Sinica, 2025, 56(11): 5706-5720.
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