Altered protein expression pattern in colon tissue of mice upon supplementation with distinct selenium compounds

Altered protein expression pattern in colon tissue of mice upon supplementation with distinct selenium compounds
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补充不同的硒化合物后小鼠结肠组织中蛋白质表达模式的改变

DOI:
10.1002/pmic.201600486
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发表时间:
2017
期刊:
影响因子:
3.4
通讯作者:
Barbara
Barbara
中科院分区:
生物学3区
文献类型:
--
作者:
Lennicke;Claudia;Anna P;Müller;Andreas S;Wessjohann;Ludger A;Lichtenfels;Rudolf;Seliger;Barbara

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人体必需的微量元素硒(Se)在健康和疾病中的作用一直存在争议。其多种生理功能主要通过硒掺入硒蛋白的催化中心来介导。为了深入了解硒缺乏和补充不同硒化合物的影响,(亚硒酸盐、硒酸盐、硒代甲硫氨酸)(推荐,150 μg/kg饲料;过量,750 μg/kg饲料),进行20周喂养实验,随后通过2D-DIGE和MALDI-TOF MS分析结肠组织样本的蛋白质表达模式。方法,24个蛋白质点被确定为显着调节的不同硒化合物。这些包括抗氧化酶过氧化物氧还蛋白-5(PRDX 5),具有结合能力的蛋白质,如cofilin-1(COF 1),钙调蛋白和膜联蛋白A2(ANXA 2),以及参与催化过程的蛋白质,如6-磷酸葡萄糖酸脱氢酶(6PGD)。此外,Se化合物对鉴定的蛋白质的表达表现出不同的影响。通过qPCR和Western印迹验证所选靶结构,其主要确认蛋白质组学分析数据。因此,新的硒调节蛋白在结肠组织中已被确定,这扩大了我们对硒在结肠组织中的生理作用的理解。
The essential trace element selenium (Se) is controversially discussed concerning its role in health and disease. Its various physiological functions are largely mediated by Se incorporation in the catalytic center of selenoproteins. In order to gain insights into the impact of Se deficiency and of supplementation with different Se compounds (selenite, selenate, selenomethionine) at defined concentrations (recommended, 150 μg/kg diet; excessive, 750 μg/kg diet) in murine colon tissues, a 20‐week feeding experiment was performed followed by analysis of the protein expression pattern of colon tissue specimens by 2D‐DIGE and MALDI‐TOF MS. Using this approach, 24 protein spots were identified to be significantly regulated by the different Se compounds. These included the antioxidant enzyme peroxiredoxin‐5 (PRDX5), proteins with binding capabilities, such as cofilin‐1 (COF1), calmodulin, and annexin A2 (ANXA2), and proteins involved in catalytic processes, such as 6‐phosphogluconate dehydrogenase (6PGD). Furthermore, the Se compounds demonstrated a differential impact on the expression of the identified proteins. Selected target structures were validated by qPCR and Western blot which mainly confirmed the proteomic profiling data. Thus, novel Se‐regulated proteins in colon tissues have been identified, which expand our understanding of the physiologic role of Se in colon tissue.
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DOI: 10.1039/c3mt00002h
发表时间: 2013-01-01
期刊: METALLOMICS
影响因子: 3.4
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影响因子: 4.8
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