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In ovo exposure to triclosan alters the hepatic proteome in chicken embryos
Ecotoxicology and Environmental Safety ( IF 6.2 ) Pub Date : 2018-09-13 , DOI: 10.1016/j.ecoenv.2018.09.043
Jiahua Guo , Hoa Thanh Nguyen , Shohei Ito , Kimika Yamamoto , Mirella Kanerva , Hisato Iwata

The occurrence of triclosan (TCS) in the eggs of wild avian species is an emerging concern. We previously evaluated the effects of in ovo exposure to TCS on the liver transcriptome of chicken embryos and proposed adverse outcome pathways (AOPs). However, the key molecular events identified to be affected need to be verified at the protein level. Herein, we investigated the changes in the spectrum of hepatic proteins in TCS-treated chicken embryos by proteomic analysis to validate the key signaling pathways involved in the AOPs. We identified and quantified 894 unique proteins using matrix-assisted laser desorption/ionization time-of-flight/time-of-flight tandem mass spectrometry. In the 0.1 (low dose), 1 (median dose), and 10 μg triclosan/g egg (high dose) groups, TCS caused significant changes in the levels of 195, 233, and 233 proteins in males and 237, 188, and 156 proteins in females, respectively (fold changes > 1.3 or < 0.7). TCS exposure modulated the expression of proteins, predominantly involved in signaling pathways of lipid and energy metabolism in both genders. Among the proteins associated with TCS metabolism in the liver, phase I (e.g., CYP2C23a) and phase II (e.g., UGT1A1) enzymes mediated by chicken xenobiotic receptor, were only induced in males. In consonance with the malondialdehyde levels, which were increased upon TCS exposure in females in a dose-dependent manner, a battery of antioxidant enzymes, notably SOD2, GST, GSTz1, and PRDX1, was decreased and SOD1 and GSTK1 were increased in the embryos. Taken together, this proteome analysis complements the transcriptome profiling reported in our previous study and authenticates the AOPs proposed for chicken embryos in ovo exposed to TCS.



中文翻译:

在卵内暴露于三氯生会改变鸡胚中的肝蛋白质组

在野生鸟类的卵中三氯生(TCS)的出现是一个新出现的问题。我们之前曾评估过in ovo的作用暴露于鸡胚肝转录组上的TCS和建议的不良结局途径(AOP)。但是,被鉴定为受影响的关键分子事件需要在蛋白质水平上进行验证。在这里,我们通过蛋白质组学分析调查了TCS处理的鸡胚中肝蛋白质谱的变化,以验证AOP中涉及的关键信号通路。我们使用基质辅助激光解吸/电离飞行时间/飞行时间串联质谱法鉴定并量化了894种独特蛋白质。在0.1(低剂量),1(中剂量)和10μg三氯生/ g鸡蛋(高剂量)组中,TCS导致雄性195、233和233蛋白水平以及237、188和233种蛋白水平显着变化。雌性中分别有156种蛋白质(倍数变化> 1.3或<0.7)。TCS暴露调节了蛋白质的表达,主要参与了男女的脂质和能量代谢的信号传导途径。在与TCS在肝脏中代谢相关的蛋白质中,仅由雄性异种受体介导的I期(例如CYP2C23a)和II期(例如UGT1A1)酶被诱导。与雌性TCS暴露后丙二醛水平升高有关,丙二醛水平呈剂量依赖性,减少了一组抗氧化酶,特别是SOD2,GST,GSTz1和PRDX1的抗氧化剂,并增加了胚胎中SOD1和GSTK1的含量。两者合计,这种蛋白质组学分析补充了我们先前研究中报道的转录组谱分析,并验证了为鸡胚提议的AOPs 在男女中主要参与脂质和能量代谢的信号传导途径。在与TCS在肝脏中代谢相关的蛋白质中,仅由雄性异种受体介导的I期(例如CYP2C23a)和II期(例如UGT1A1)酶被诱导。与雌性TCS暴露后丙二醛水平升高有关,丙二醛水平呈剂量依赖性,减少了一组抗氧化酶,特别是SOD2,GST,GSTz1和PRDX1的抗氧化剂,并增加了胚胎中SOD1和GSTK1的含量。两者合计,这种蛋白质组学分析补充了我们先前研究中报道的转录组谱分析,并验证了为鸡胚提议的AOPs 在男女中主要参与脂质和能量代谢的信号传导途径。在与TCS在肝脏中代谢相关的蛋白质中,仅由雄性异种受体介导的I期(例如CYP2C23a)和II期(例如UGT1A1)酶被诱导。与雌性TCS暴露后丙二醛水平升高有关,丙二醛水平呈剂量依赖性,减少了一组抗氧化酶,特别是SOD2,GST,GSTz1和PRDX1的抗氧化剂,并增加了胚胎中SOD1和GSTK1的含量。两者合计,这种蛋白质组学分析补充了我们先前研究中报道的转录组谱分析,并验证了为鸡胚提议的AOPs 鸡异种受体介导的UGT1A1)酶仅在雄性中诱导。与雌性TCS暴露后丙二醛水平升高有关,丙二醛水平呈剂量依赖性,减少了一组抗氧化酶,特别是SOD2,GST,GSTz1和PRDX1的抗氧化剂,并增加了胚胎中SOD1和GSTK1的含量。两者合计,这种蛋白质组学分析补充了我们先前研究中报道的转录组谱分析,并验证了为鸡胚提议的AOPs 鸡异种受体介导的UGT1A1)酶仅在雄性中诱导。与雌性TCS暴露后丙二醛水平升高有关,丙二醛水平呈剂量依赖性,减少了一组抗氧化酶,特别是SOD2,GST,GSTz1和PRDX1的抗氧化剂,并增加了胚胎中SOD1和GSTK1的含量。两者合计,这种蛋白质组学分析补充了我们先前研究中报道的转录组谱分析,并验证了为鸡胚提议的AOPs暴露于TCS的ovo中

更新日期:2018-09-13
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