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目的:中国における格子状角膜ジストロフィのTGFBI遺伝子を解析する。方法:11家系,患者26名,家系内正常者6名,正常者50名について,インフォームド・コンセントを得たうえで末梢血からゲノムDNAを抽出し,エクソン部分を増幅・精製後,直接塩基配列を調べた。結果:すでに報告のあるR124CとH626Rはそれぞれ6家系14名と2家系3名の患者に,新たにV505Dが1家系8名,P542Rが2家系2名に確認された。50名の正常者にはいずれの変異もなかった。結論:R124C変異は中国でも多く54.5%であった。ヨーロッパ,インドやベトナムにみられ日本には報告のないH626Rが中国で2家系みられたことは興味深い。
Purpose:To report TGFBI gene mutations in the Chinese with lattice corneal dystrophy. Cases and Methods:Samples were obtained from the circulating blood of 82 persons. The series comprised 26 affected and 6 unaffected persons in 11 pedigrees,and 50 normal persons. Genomic DNA in the samples was then amplified by polymerase chain reaction and was directly sequenced. Results:R124C was present in 14members of 6 pedigrees. H626R was present in 3members of 2 pedigrees. As novel findings,V505D was present in 8members of one pedigree,and P542R was present in 2members of 2 pedigrees. No mutation was present in 50 normal persons. Conclusion:The incidence of R124C was 54.5% in Chinese patients. This rate was comparable with that in the Japanese(44.4%). Presence of H626R in 2 Chinese pedigrees are of interest,since it was found in Europeans,Indians and Vietnamese but not in the Japanese.
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