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Deletion of chromosome 12q21 affecting KCNC2 and ATXN7L3B in a family with neurodevelopmental delay and ataxia.
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In: J Neurol Neurosurg Psychiatry , 84 (11) 1255 - 1257. (2013) (2013)
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Duplications and copy number variants of 8p23.1 are cytogenetically indistinguishable but distinct at the molecular level.
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In: PubMed ; http://www.ncbi.nlm.nih.gov/pubmed/ (2012)
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Microdeletion at chromosome 4q21 defines a new emerging syndrome with marked growth restriction, mental retardation and absent or severely delayed speech
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In: ISSN: 0022-2593 ; EISSN: 1468-6244 ; Journal of Medical Genetics ; https://hal.archives-ouvertes.fr/hal-02128729 ; Journal of Medical Genetics, BMJ Publishing Group, 2010, 47 (6), pp.377-384. ⟨10.1136/jmg.2009.071902⟩ (2010)
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Molecular genetic delineation of a deletion of chromosome 13q12-->q13 in a patient with autism and auditory processing deficits.
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In: Cytogenetic and genome research, vol 98, iss 4 (2002)
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The SPCH1 region on human 7q31: genomic characterization of the critical interval and localization of translocations associated with speech and language disorder.
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Lai, CS; Fisher, SE; Hurst, JA; Levy, ER; Hodgson, S; Fox, M; Jeremiah, S; Povey, S; Jamison, DC; Green, ED; Vargha-Khadem, F; Monaco, AP
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In: Symplectic Elements at Oxford ; Europe PubMed Central ; PubMed (http://www.ncbi.nlm.nih.gov/pubmed/) ; Web of Science (Lite) (http://apps.webofknowledge.com/summary.do) ; Scopus (http://www.scopus.com/home.url) ; CrossRef (2000)
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Abstract:
The KE family is a large three-generation pedigree in which half the members are affected with a severe speech and language disorder that is transmitted as an autosomal dominant monogenic trait. In previously published work, we localized the gene responsible (SPCH1) to a 5.6-cM region of 7q31 between D7S2459 and D7S643. In the present study, we have employed bioinformatic analyses to assemble a detailed BAC-/PAC-based sequence map of this interval, containing 152 sequence tagged sites (STSs), 20 known genes, and >7.75 Mb of completed genomic sequence. We screened the affected chromosome 7 from the KE family with 120 of these STSs (average spacing <100 kb), but we did not detect any evidence of a microdeletion. Novel polymorphic markers were generated from the sequence and were used to further localize critical recombination breakpoints in the KE family. This allowed refinement of the SPCH1 interval to a region between new markers 013A and 330B, containing approximately 6.1 Mb of completed sequence. In addition, we have studied two unrelated patients with a similar speech and language disorder, who have de novo translocations involving 7q31. Fluorescence in situ hybridization analyses with BACs/PACs from the sequence map localized the t(5;7)(q22;q31.2) breakpoint in the first patient (CS) to a single clone within the newly refined SPCH1 interval. This clone contains the CAGH44 gene, which encodes a brain-expressed protein containing a large polyglutamine stretch. However, we found that the t(2;7)(p23;q31.3) breakpoint in the second patient (BRD) resides within a BAC clone mapping >3.7 Mb distal to this, outside the current SPCH1 critical interval. Finally, we investigated the CAGH44 gene in affected individuals of the KE family, but we found no mutations in the currently known coding sequence. These studies represent further steps toward the isolation of the first gene to be implicated in the development of speech and language.
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Keyword:
Base Sequence; Child; Chromosome Breakage; Chromosomes; Cloning; Contig Mapping; DNA Mutational Analysis; Dominant; Expressed Sequence Tags; Female; Fluorescence; Genes; Genetic; Genetic Linkage; Haplotypes; Human; Humans; Hybrid Cells; In Situ Hybridization; Language Development Disorders; Male; Microsatellite Repeats; Molecular; Pair 7; Pedigree; Polymorphism; Preschool; Sequence Deletion; Sequence Tagged Sites; Speech Disorders; Translocation
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URL: https://doi.org/10.1086/303011
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A balanced t(10;15) translocation in a male patient with developmental language disorder.
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