Mitochondrial tRNA valine as a recurrent target for mutations involved in mitochondrial cardiomyopathies

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• 作者：Juan J. Arredondo^a ; ¹ ; M. Esther Gallardo^a ; ^b ; ¹ ; Pablo Garc&#237 ; a-Pav&#237 ; a^c ; ^d ; Veró ; nica Domingo^a ; Begoñ ; a Bretó ; n^a ; M. Teresa Garc&#237 ; a-Silva^e ; M. Jesú ; s Sedano^f ; Miguel A. Mart&#237 ; n^g ; ^b ; Joaqu&#237 ; n Arenas^g ; ^b ; Margarita Cervera^a ; Rafael Garesse^a ; ^b ; Belé ; n Bornstein^a ; ^b ; ^h ; ^{belen.bornstein@uam.es}
• 关键词：MD ; mitochondrial disease ; mtDNA ; mitochondrial DNA ; tRNA ; transfer ribonucleic acid ; MCM ; mitochondrial cardiomyopathy ; MELAS ; mitochondrial encephalopathy ; lactic acidosis and stroke-like episodes ; MiMyCa ; maternally inherited myopathy and cardiomyopath
• 刊名：Mitochondrion
• 出版年：2012
• 期刊代码：39_15677249
• 类别：neu
• 出版时间：March, 2012
• 卷：12
• 期：2
• 页码：357-362
• 文件大小：482 K

摘要

The aim of this study was to identify the genetic defect in two patients having cardiac dysfunction accompanied by neurological symptoms, and in one case MRI evidence of cortical and cerebellar atrophy with hyperintensities in the basal ganglia. Muscle biopsies from each patient revealed single and combined mitochondrial respiratory chain deficiency. The complete mtDNA sequencing of both patients revealed two transitions in the mitochondrial tRNA^Val gene (MT-TV) (m.1628C > T in Patient 1, and m.1644G > A in Patient 2). The functional and molecular analyses reported here suggest that the MT-TV gene should be routinely considered in the diagnosis of mitochondrial cardiomyopathies.