TAILIEUCHUNG - Báo cáo y học: "Exome sequencing identifies a novel missense variant in RRM2B associated with autosomal recessive progressive external ophthalmoplegia"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Wertheim cung cấp cho các bạn kiến thức về ngành y đề tài: Exome sequencing identifies a novel missense variant in RRM2B associated with autosomal recessive progressive external ophthalmoplegia. | Takata et al. Genome Biology 2011 12 R92 http 2011 12 9 R92 Genome Biology RESEARCH Open Access Exome sequencing identifies a novel missense variant in RRM2B associated with autosomal recessive progressive external ophthalmoplegia A-f-ci icki T 1 2 3 j l-Ji r IZ-j-f-r k4 í I C3 I ilzi ir 4 Vr tchilzTUA Ti3 I kf nH 2 ALir Qnn i4 fiiH Aisusni Idkatd IVIdiko Kdio IVIdsdyuki iNdkdlllUld Tdkeo losilikdVVd Slligenobu Kdnbd Akird jaHU dnd Tdddfumi Kdto1 Abstract Background Whole-exome sequencing using next-generdtion technologies hds been previously demonstrated to be dble to detect rare disedse-cdusing vdridnts. Progressive externdl ophthdlmoplegid PEO is dn inherited mitochondridl disedse thdt follows either dutosomdl domindnt or recessive forms of inheritdnce ddPEO or drPEO . AdPEO is d geneticdlly heterogeneous disedse dnd several genes including POLG1 dnd Ci0orf2 Twinkle hdve been identified ds responsible genes. On the other hdnd POLG1 wds the only estdblished gene cdusing drPEO with mitochondridl DNA deletions. We previously reported d cdse of PEO with unidentified genetic etiology. The pdtient wds born of d first-cousin mdrridge. Therefore the recessive form of inheritdnce wds suspected. Results To identify the disedse-cdusing vdridnt in this pdtient we subjected the pdtient s DNA to whole-exome sequencing dnd ndrrowed down the cdndiddte vdridnts using public ddtd dnd runs of homozygosity dndlysis. A totdl of 35 novel putdtively functiondl vdridnts were detected in the homozygous segments. When we sorted these vdridnts by the conservdtion score d novel missense vdridnt in RRM2B whose heterozygous rare vdridnt hdd been known to cduse ddPEO wds ranked dt the top. The list of novel putdtively functiondl vdridnts did not contdin dny other vdridnt in genes encoding mitochondridl proteins registered in MitoCdrtd. Conclusions Exome sequencing efficiently dnd effectively identified d novel homozygous missense vdridnt in RRM2B which wds strongly suggested

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