TY - JOUR ID - 4993 TI - Novel Missense Mitochondrial ND4L Gene Mutations in Friedreich's Ataxia JO - Iranian Journal of Basic Medical Sciences JA - IJBMS LA - en SN - 2008-3866 AU - Heidari, Mohammad Mehdi AU - Khatami, Mehri AD - Department of Biology, Science School, Yazd University, Yazd, Iran. Y1 - 2011 PY - 2011 VL - 14 IS - 3 SP - 219 EP - 224 KW - Friedreich's ataxia (FRDA) KW - mtDNA KW - Mutation KW - ND4L gene DO - 10.22038/ijbms.2011.4993 N2 - Objective(s) The mitochondrial defects in Friedreich's ataxia have been reported in many researches. Mitochondrial DNA is one of the candidates for defects in mitochondrion, and complex I is the first and one of the largest catalytic complexes of oxidative phosphorylation (OXPHOS) system. Materials and Methods We searched the mitochondrial ND4L gene for mutations by TTGE and sequencing on 30 FRDA patients and 35 healthy controls. Results We found 3 missense mutations [m.10506A>G (T13A), m.10530G>A (V21M), and m.10653G>A (A62T)] in four patients whose m.10530G>A and m.10653G>A were not reported previously. In two patients, heteroplasmic m.10530G>A mutation was detected. They showed a very early ataxia syndrome. Our results showed that the number of mutations in FRDA patients was higher than that in the control cases (P= 0.0287). Conclusion Although this disease is due to nuclear gene mutation, the presence of these mutations might be responsible for further mitochondrial defects and the increase of the gravity of the disease. Thus, it should be considered in patients with this disorder. UR - https://ijbms.mums.ac.ir/article_4993.html L1 - https://ijbms.mums.ac.ir/article_4993_ebe6a2dfbfb1b7f03801259a5d7291a7.pdf ER -