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A case of gyrate chorioretinal atrophy with OAT gene mutation Yoko Kondo 1,2 , Hiroyuki Yamamoto 1 , Hisanori Imai 1 , Yoriko Nakanishi 1 , Atsushi Azumi 1 , Yasutomo Tsukahara 1 , Akira Negi 1 1Div of Ophthalmol,Dept of Organs Therapeutics,Kobe Univ Grad Sch of Med 2Dept of Ophthalmol,Akashi Munic Hosp pp.1691-1695
Published Date 2006/9/15
DOI https://doi.org/10.11477/mf.1410100939
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Abstract. Background:There are two genetic types of gyrate chorioretinal atrophy regarding the location of OAT gene mutation. One may respond to systemic vitamin B6 by decrease in serum ornithine with favorable prognosis. The other may be refractory to vitamin B6. Purpose:To analyze OAT gene mutation in a case of this disorder and to assess the effect of treatment with massive vitamin B6. Case:The patient was a 21-year-old female with night blindness since childhood. She showed typical funduscopic features of gyrate atrophy and elevated level of serum ornithine. She was offspring of consanguinous marriage. Method:Polymerase chain reaction was used to determine the genotype of OAT gene in leukocytes in the peripheral blood. Results:Homogenous C1276T(Arg426ter)OAT mutation was present in exon 11. This type of gyrate atrophy is claimed to be refractory to systemic vitamin B6. Conclusion:Gene analysis can distinguish gyrate atrophy that does and does not respsond to systemic vitamin B6.


Copyright © 2006, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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