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Cell Mol Neurobiol. 2006 Mar;26(2):119-25. Epub 2006 May 6.

Mitochondrial D-loop variation in Persian multiple sclerosis patients: K and A haplogroups as a risk factor!!

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  • 1Institute of Biochemistry and Biophysics, University of Tehran, Iran.


: Multiple Sclerosis (MS) is a multifocal demyelinating central nervous system disorder in which interplay between genes and the environment are supposed to be involved. Mitochondrial DNA (mtDNA) has the only non-coding regions at the displacement loop (D-loop) region that contains two hypervariable segments (HVS-I and HVS-II) with high polymorphism. mtDNA has already been fully sequenced and many subsequent publications have showed polymorphic sites, haplogroups and haplotypes. Haplogroups could have important implications to understand association between mutability of the mitochondrial genome and disease. To assess relationship between mtDNA haplogroups and MS, we have sequenced the mtDNA HVS-I in 54 MS patients and 100 control subjects. We have found that haplogroups A and K are significantly more abundant in MS patients (P=0.042 for haplogroup A and P=0.0005 for haplogroup K). Thus, these two haplogroups might act synergistically to increase the penetrance of MS disease.

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