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Mitochondrial DNA variations and mitochondrial dysfunction in Fanconi anemia.
PLOS ONE ( IF 2.9 ) Pub Date : 2020-01-15 , DOI: 10.1371/journal.pone.0227603
Avani Solanki 1 , Aruna Rajendran 2 , Sheila Mohan 3 , Revathy Raj 3 , Babu Rao Vundinti 1
Affiliation  

In-vitro studies with different Fanconi anemia (FA) cell lines and FANC gene silenced cell lines indicating involvement of mitochondria function in pathogenesis of FA have been reported. However, in-vivo studies have not been studied so far to understand the role of mitochondrial markers in pathogenesis of FA. We have carried out a systematic set of biomarker studies for elucidating involvement of mitochondrial dysfunction in disease pathogenesis for Indian FA patients. We report changes in the mtDNA number in 59% of FA patients studied, a high frequency of mtDNA variations (37.5% of non-synonymous variations and 62.5% synonymous variations) and downregulation of mtDNA complex-I and complex-III encoding genes of OXPHOS (p<0.05) as strong biomarkers for impairment of mitochondrial functions in FA. Deregulation of expression of mitophagy genes (ATG; p>0.05, Beclin-1; p>0.05, and MAP1-LC3, p<0.05) has also been observed, suggesting inability of FA cells to clear off impaired mitochondria. We hypothesize that accumulation of such impaired mitochondria in FA cells therefore may be the principal cause for bone marrow failure (BMF) and a plausible effect of inefficient clearance of impaired mitochondria in FA.

中文翻译:

范可尼贫血的线粒体DNA变异和线粒体功能障碍。

已经报道了用不同的范可尼贫血(FA)细胞系和FANC基因沉默的细胞系进行的体外研究,表明线粒体功能参与了FA的发病机理。但是,到目前为止,尚未进行体内研究来了解线粒体标记物在FA发病机理中的作用。我们已经进行了一套系统的生物标志物研究,以阐明印度FA患者的线粒体功能障碍与疾病发病机理的关系。我们报告了研究的59%的FA患者的mtDNA数量变化,较高的mtDNA变异频率(37.5%的非同义变异和62.5%的同义变异)以及OXPHOS的mtDNA复杂I和复杂III编码基因的下调(p <0.05)是FA中线粒体功能受损的强生物标志物。还观察到线粒体基因表达的失调(ATG; p> 0.05,Beclin-1; p> 0.05,和MAP1-LC3,p <0.05),表明FA细胞无法清除受损的线粒体。我们假设这种受损的线粒体在FA细胞中的积累因此可能是骨髓衰竭(BMF)的主要原因,并且是FA中受损线粒体清除效率低下的合理影响。
更新日期:2020-01-16
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