Clinical and molecular genetic characterization of two siblings with trisomy 2p24.3-pter and monosomy 5p14.3-pter
| Autor: | Seiji Watanabe, Kenji Yokochi, Nobuaki Wakamatsu, Yasuyo Suzuki, Kenji Kurosawa, Kaoru Suzuki, Daisuke Fukushi, Kenichiro Yamada |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Cri-du-Chat Syndrome
Male 0301 basic medicine congenital hereditary and neonatal diseases and abnormalities Monosomy Pediatrics medicine.medical_specialty Trisomy Chromosomal translocation 030105 genetics & heredity Translocation Genetic Encephalocele 03 medical and health sciences Anencephaly Genetics medicine Humans Neural Tube Defects Child Spinal Dysraphism Genetics (clinical) Spina bifida business.industry Siblings Breakpoint Neural tube medicine.disease Magnetic Resonance Imaging nervous system diseases medicine.anatomical_structure Child Preschool Chromosomes Human Pair 2 Chromosomes Human Pair 5 Female business |
| Zdroj: | American Journal of Medical Genetics Part A. 173:2201-2209 |
| ISSN: | 1552-4825 |
| Popis: | Partial trisomy 2p syndrome is occasionally associated with neural tube defects (NTDs), such as anencephaly, encephalocele, and spina bifida, in addition to common features of intellectual disability, developmental delay, and characteristic facial appearance. The 2p24 region has been reported to be associated with NTDs. Here, we report the cases of 2 siblings with trisomy 2p24.3-pter and monosomy 5p14.3-pter caused by the paternal translocation t(2;5)(p24.3;p14.3). Of the two siblings, the elder sister had spina bifida. We determined the nucleotide sequences of the chromosomal breakpoints and found that the sizes of trisomy 2p and monosomy 5p segments were 18.77 and 17.89 Mb, respectively. NTDs were present in four of seven previously reported patients with trisomy 2p and monosomy 5p as well as in one of the two patients examined in the present study. Although the monosomy 5p of the nine patients were similar in size, the two patients reported here had the smallest size of trisomy 2p. When the clinical features of the nine patients were compared to the present two patients, the elder sister had postaxial polydactyly of the left foot in addition to the characteristic facial appearance and spina bifida, indicating that these features were associated with trisomy 2p24.3-pter. To our knowledge, this is the first study on spina bifida to determine the nucleotide sequences of breakpoints for trisomy 2p24.3-pter and monosomy 5p14.3-pter. Increased gene dosages of dosage-sensitive genes or genes at the trisomy segment (2p24.3) of the presented patients could be associated with NTDs of patients with trisomy 2p. |
| Databáze: | OpenAIRE |
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