Volume 128, Issue 1 pp. 185-193
Research Article
Full Access

Genetic diversity of JC virus in the Saami and the Finns: Implications for their population history

Hiroshi Ikegaya

Corresponding Author

Hiroshi Ikegaya

Department of Forensic Medicine, University of Turku, Turku, Finland 20520

Department of Forensic Medicine, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JapanSearch for more papers by this author
Huai-Ying Zheng

Huai-Ying Zheng

Department of Urology, Faculty of Medicine, University of Tokyo, Tokyo, Japan 113-0033

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Pekka J. Saukko

Pekka J. Saukko

Department of Forensic Medicine, University of Turku, Turku, Finland 20520

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Leena Varesmaa-Korhonen

Leena Varesmaa-Korhonen

Ivalo Health Center, Ivalo, Finland 99800

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Tapani Hovi

Tapani Hovi

Department of Microbiology, National Public Health Institute, Mannerheimintie, Helsinki, Finland 00300

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Timo Vesikari

Timo Vesikari

Department of Virology and Vaccine Research, University of Tampere Medical School, Tampere, Finland 33014

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Hideki Suganami

Hideki Suganami

Graduate Course of Biomedical Statistics, Tokyo University of Science, Tokyo, Japan162-8602

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Tomokazu Takasaka

Tomokazu Takasaka

Department of Urology, Faculty of Medicine, University of Tokyo, Tokyo, Japan 113-0033

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Chie Sugimoto

Chie Sugimoto

Tsukuba Primate Center for Medical Science, National Institute of Infectious Diseases, Tsukuba, Japan 305-0843

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Yasuo Ohasi

Yasuo Ohasi

Department of Biostatistics/Epidemiology and Preventive Health Science, Faculty of Medicine, University of Tokyo, Tokyo, Japan 113-0033

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Tadaichi Kitamura

Tadaichi Kitamura

Department of Urology, Faculty of Medicine, University of Tokyo, Tokyo, Japan 113-0033

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Yoshiaki Yogo

Yoshiaki Yogo

Department of Urology, Faculty of Medicine, University of Tokyo, Tokyo, Japan 113-0033

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First published: 15 August 2005
Citations: 16

Abstract

The JC virus (JCV) genotyping method was used to gain insights into the population history of the Saami and the Finns, both speaking Finno-Ugric languages and living in close geographic proximity. Urine samples from Saami and Finns, collected in northern and southern Finland, respectively, were used to amplify a 610-bp JCV-DNA region containing abundant type-specific mutations. Based on restriction site polymorphisms in the amplified fragments, we classified JCV isolates into one of the three superclusters of JCV, type A, B, or C. All 15 Saami isolates analyzed and 41 of 43 Finnish isolates analyzed were classified as type A, the European type, and two samples from Finns were classified as type B, the African/Asian type. We then amplified and sequenced a 583-bp JCV-DNA region from the type A isolates of Saami and Finns. According to type-determining nucleotides within the region, we classified type A isolates into EU-a1, -a2, or -b. Most type A isolates from Saami were classified as EU-a1, while type A isolates from Finns were distributed among EU-a1, EU-a2, and EU-b. This trend in the JCV-genotype distribution was statistically significant. On a phylogenetic tree based on complete sequences, most of the type A isolates from Saami were clustered in a single clade within EU-a1, while those from Finns were distributed throughout EU-a1, EU-a2, and EU-b. These findings are discussed in the context of the population history of the Saami and the Finns. This study provides new complete JCV DNA sequences derived from populations of anthropological interest. Am J Phys Anthropol 128:185-193, 2005. © 2005 Wiley-Liss, Inc.

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