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Proteomic and cell biological profiling of the renal phenotype of the mdx-4cv mouse model of Duchenne muscular dystrophy.
European Journal of Cell Biology ( IF 6.6 ) Pub Date : 2019-11-18 , DOI: 10.1016/j.ejcb.2019.151059
Paul Dowling 1 , Margit Zweyer 2 , Maren Raucamp 2 , Michael Henry 3 , Paula Meleady 3 , Dieter Swandulla 2 , Kay Ohlendieck 1
Affiliation  

The X-linked inherited muscle wasting disease Duchenne muscular dystrophy, which is caused by primary abnormalities in the membrane cytoskeletal protein dystrophin, is a multi-system disorder. Highly progressive forms of dystrophinopathy are associated with a complex secondary pathophysiology, including renal dysfunction. It was therefore of interest to carry out a systematic survey of potential proteome-wide changes in the kidney of the established mdx-4cv mouse model of dystrophinopathy. Of 5878 mass spectrometrically identified kidney proteins, 82 versus 142 proteins were shown to be decreased or increased, respectively, in association with muscular dystrophy. The most decreased versus increased protein species are the ACSM3 isoform of mitochondrial acyl-coenzyme A synthetase and the FABP1 isoform of fatty acid binding protein, respectively. Both proteomic findings were verified by immunofluorescence microscopy and immunoblot analysis. Interestingly, haematoxylin/eosin staining indicated diffuse whitish deposits in the mdx-4cv kidney, and an increased intensity of Sudan Black labelling of kidney cells revealed ectopic fat deposition. Although the proteomic results and cell biological findings do not demonstrate a direct functional link between increased FABP1 and fat accumulation, the results suggest that the up-regulation of FABP1 may be related to abnormal fat metabolism. This makes FABP1 potentially a novel pathobiochemical indicator for studying kidney abnormalities in the mdx-4cv model of dystrophinopathy.

中文翻译:

蛋白质组学和细胞生物学分析的杜兴氏肌营养不良症的mdx-4cv小鼠模型的肾脏表型。

X连锁遗传性肌肉萎缩症Duchenne肌营养不良症是由膜细胞骨架蛋白营养不良素的主要异常引起的,是一种多系统疾病。肌营养不良病的高度进展形式与复杂的继发性病理生理学有关,包括肾功能不全。因此,有兴趣对已建立的肌营养不良性疾病的mdx-4cv小鼠模型的肾脏中蛋白质组范围内的潜在潜在变化进行系统的调查。在质谱鉴定出的5878种肾脏蛋白中,与肌肉营养不良有关的蛋白分别有82种和142种减少或增加。与增加的蛋白质种类相比,减少最多的蛋白质分别是线粒体酰基辅酶A合成酶的ACSM3同工型和脂肪酸结合蛋白的FABP1同工型。两种蛋白质组学发现均通过免疫荧光显微镜和免疫印迹分析进行了验证。有趣的是,苏木精/曙红染色表明在mdx-4cv肾脏中弥漫着发白的沉积物,肾细胞的苏丹黑标记强度增加表明异位脂肪沉积。尽管蛋白质组学结果和细胞生物学发现并未显示出FABP1增加与脂肪积累之间存在直接的功能联系,但结果表明FABP1的上调可能与脂肪代谢异常有关。这使得FABP1可能成为研究肌营养不良症的mdx-4cv模型中肾脏异常的新型病理生物化学指标。苏木/曙红染色表明在mdx-4cv肾脏中弥漫着淡淡的白色沉淀,并且肾细胞的苏丹黑标记强度增加表明异位脂肪沉积。尽管蛋白质组学结果和细胞生物学发现未显示出FABP1增加与脂肪积累之间存在直接的功能联系,但结果表明FABP1的上调可能与脂肪代谢异常有关。这使得FABP1可能成为研究肌营养不良症的mdx-4cv模型中肾脏异常的新型病理生物化学指标。苏木/曙红染色表明在mdx-4cv肾脏中弥漫着淡淡的白色沉淀,并且肾细胞的苏丹黑标记强度增加表明异位脂肪沉积。尽管蛋白质组学结果和细胞生物学发现并未显示出FABP1增加与脂肪积累之间存在直接的功能联系,但结果表明FABP1的上调可能与脂肪代谢异常有关。这使得FABP1可能成为研究肌营养不良症的mdx-4cv模型中肾脏异常的新型病理生物化学指标。结果提示FABP1的上调可能与脂肪代谢异常有关。这使得FABP1可能成为研究肌营养不良症的mdx-4cv模型中肾脏异常的新型病理生物化学指标。结果提示FABP1的上调可能与脂肪代谢异常有关。这使得FABP1可能成为研究肌营养不良症的mdx-4cv模型中肾脏异常的新型病理生物化学指标。
更新日期:2019-11-18
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