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Alzheimer’s and Parkinson’s Brain Tissues Have Reduced Expression of Genes for mtDNA OXPHOS Proteins, Mitobiogenesis Regulator PGC-1α Protein and mtRNA Stabilizing Protein LRPPRC (LRP130)
Mitochondrion ( IF 3.9 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.mito.2020.05.012
James P Bennett 1 , Paula M Keeney 1
Affiliation  

We used RNA sequencing (RNA-seq) to quantitate gene expression in total RNA extracts of vulnerable brain tissues from Alzheimer's disease (AD, frontal cortical ribbon) and Parkinson's disease (PD, ventral midbrain) subjects and phenotypically negative control subjects. Paired-end sequencing files were processed with HISAT2 aligner/Cufflinks quantitation against the hg38 human genome. We observed a significant decrease in gene expression of all mtDNA OXPHOS genes in AD and PD tissues. Gene expression of the master mitochondrial biogenesis regulator PGC-1α (PPARGC1A) was significantly reduced in AD; expression of genes for mitochondrial transcription factors A (TFAM) and B1/B2 (TFB1M/TFB2M) were not significantly changed in AD and PD tissues. 2-way ANOVAs showed significant reduction in AD brain Complex I subunits' expressions and nearly significant reductions in PD brain. We found a significant reduction in both AD and PD brain samples of expression of genes for leucine-rich pentatricopeptide repeat containing (LRPPRC, a.k.a. LRP130), a known mtRNA-stabilizing protein. Our findings suggest that AD and PD brain tissues have a reduction in mitochondrial ATP production derived from a reduction of mitobiogenesis and mtRNA stability. If true, increased brain expression of PGC-1α and/or LRPPRC may improve bioenergetics of AD and PD and alter the course of neurodegeneration in both conditions. (201 words).

中文翻译:

阿尔茨海默氏症和帕金森氏症的脑组织降低了 mtDNA OXPHOS 蛋白、线粒体合成调节剂 PGC-1α 蛋白和 mtRNA 稳定蛋白 LRPPRC (LRP130) 基因的表达

我们使用 RNA 测序 (RNA-seq) 对来自阿尔茨海默病(AD,额叶皮质带)和帕金森病(PD,腹侧中脑)受试者和表型阴性对照受试者的易损脑组织的总 RNA 提取物中的基因表达进行定量。双端测序文件使用 HISAT2 aligner/Cufflinks 对 hg38 人类基因组进行定量处理。我们观察到 AD 和 PD 组织中所有 mtDNA OXPHOS 基因的基因表达显着下降。AD中线粒体生物合成主调控因子PGC-1α(PPARGC1A)的基因表达显着降低;AD和PD组织中线粒体转录因子A(TFAM)和B1/B2(TFB1M/TFB2M)基因的表达没有显着变化。2 路方差分析显示 AD 脑复合体 I 亚基显着减少 PD 大脑中的表达和几乎显着减少。我们发现 AD 和 PD 脑样本中富含亮氨酸五肽重复序列(LRPPRC,又名 LRP130)的基因表达显着减少,这是一种已知的 mtRNA 稳定蛋白。我们的研究结果表明,AD 和 PD 脑组织的线粒体 ATP 产生减少,这是由于线粒体生物发生和 mtRNA 稳定性降低所致。如果属实,PGC-1α 和/或 LRPPRC 的脑表达增加可能会改善 AD 和 PD 的生物能学并改​​变两种情况下神经退行性疾病的进程。(201 字)。我们的研究结果表明,AD 和 PD 脑组织的线粒体 ATP 产生减少,这是由于线粒体生物发生和 mtRNA 稳定性降低所致。如果属实,PGC-1α 和/或 LRPPRC 的脑表达增加可能会改善 AD 和 PD 的生物能学并改​​变两种情况下神经退行性疾病的进程。(201 字)。我们的研究结果表明,AD 和 PD 脑组织的线粒体 ATP 产生减少,这是由于线粒体生物发生和 mtRNA 稳定性降低所致。如果属实,PGC-1α 和/或 LRPPRC 的脑表达增加可能会改善 AD 和 PD 的生物能学并改​​变两种情况下神经退行性疾病的进程。(201 字)。
更新日期:2020-07-01
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