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Postnatal overgrowth by 15q-trisomy and intrauterine growth retardation by 15q-monosomy due to familial translocation t(13;15): Dosage effect of IGF1R?

Authors

  • Toshiro Nagai,

    Corresponding author
    1. Department of Pediatrics, Dokkyo University School of Medicine, Koshigaya Hospital, Saitama, Japan
    2. CREST, Japan Science and Technology Corporation (JST), Kawaguchi, Japan
    • Department of Pediatrics, Dokkyo University School of Medicine, Koshigaya Hospital, Minami-Koshigaya 2-1-50, Saitama 343-8555, Japan.
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  • Osamu Shimokawa,

    1. Kyushu Medical Science, Nagasaki Laboratory, Nagasaki, Japan
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  • Naoki Harada,

    1. Kyushu Medical Science, Nagasaki Laboratory, Nagasaki, Japan
    2. Department of Human Genetics, Nagasaki University School of Medicine, Nagasaki, Japan
    3. CREST, Japan Science and Technology Corporation (JST), Kawaguchi, Japan
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  • Satoru Sakazume,

    1. CREST, Japan Science and Technology Corporation (JST), Kawaguchi, Japan
    2. Department of Medical Genetics, Shinshu University Graduate School of Medicine, Matsumoto, Japan
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  • Hirofumi Ohashi,

    1. CREST, Japan Science and Technology Corporation (JST), Kawaguchi, Japan
    2. Division of Medical Genetics, Saitama Children's Medical Center, Saitama, Japan
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  • Naomichi Matsumoto,

    1. Department of Human Genetics, Nagasaki University School of Medicine, Nagasaki, Japan
    2. CREST, Japan Science and Technology Corporation (JST), Kawaguchi, Japan
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  • Kazuo Obata,

    1. Department of Pediatrics, Dokkyo University School of Medicine, Koshigaya Hospital, Saitama, Japan
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  • Atsunori Yoshino,

    1. Department of Pediatrics, Dokkyo University School of Medicine, Koshigaya Hospital, Saitama, Japan
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  • Nobuyuki Murakami,

    1. Department of Pediatrics, Dokkyo University School of Medicine, Koshigaya Hospital, Saitama, Japan
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  • Takayasu Murai,

    1. Department of Pediatrics, Dokkyo University School of Medicine, Koshigaya Hospital, Saitama, Japan
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  • Ryoichi Sakuta,

    1. Department of Pediatrics, Dokkyo University School of Medicine, Koshigaya Hospital, Saitama, Japan
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  • Norio Niikawa

    1. Department of Human Genetics, Nagasaki University School of Medicine, Nagasaki, Japan
    2. CREST, Japan Science and Technology Corporation (JST), Kawaguchi, Japan
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Abstract

We report a 4-year-old boy, a 6-month-old girl, and a 17-week-old fetus all with a chromosomal imbalance derived from a balanced translocation t(13;15)(q34;q26.1) of their father. The boy had a partial trisomy for 15q26.1-qter (46,XY,der(13)t(13;15)(q34;q26.1)) and postnatal overgrowth, as well as craniosynostosis, facial anomalies, and finger joint contractures, while the girl with the same chromosomal aberration did not show overgrowth, although she had similar craniofacial and skeletal abnormalities. The fetus had a partial monosomy for 15q26.1-qter and intrauterine growth retardation (IUGR). Fluorescence in situ hybridization (FISH) analysis with a BAC clone covering the insulin-like growth factor 1 receptor gene (IGF1R) that is located to 15q25-q26 revealed three copies in the boy, one copy in the fetus, and two copies in their phenotypically normal father. Since deletion of IGF1Rhas repeatedly been reported to be associated with IUGR, it is tempting to speculate that the dosage of IGF1R may have determined growth in these children. © 2002 Wiley-Liss, Inc.

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