Gene therapy for familial amybidotic polyneuropathy by urtra-fundaoning artificial nucleic acids

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It is well known that the phenotype of Swedish FAP patients is quite different from that in other countries' FAP patients. To elucidate the reason, we performed the following studies. 1.Fact-finding study in northern part of Sweden : totally 8 medical doctors, such as neurologists and ophthalmologists went to northern part of Sweden to check clinical manifestations of the patients and way of living. 2.Trace metal study : Water in pond, river well, and water from water pipes were collected to measure 12 metals in water. 3.Haplotype study : Haplotypes of Swedish FAP patients were compared with those in other countries' FAP patients.By the studies, of metals in water, As concentrations were extremely higher compared with those in Japanese samples. In this project in next year, effect of As on amyloid formation in vitro will be examined in our amyloid formation assay system. Concerning clinical manifestations, as we expected, most of the patients was late-onset, and clinical manifestations were very mild. In the haplotype study, Swedish FAP patient samples showed different haplotypes in several genes compared with those in Japanese, Portugal, and Spanish FAP patients, suggesting that inaddition to the effect by environmental factors, the difference of the genetic background may partially explain the phenotype difference.In these points we continue our research projects in the next year.