Chromosome 5 derived small supernumerary marker: towards a genotype/phenotype correlation of proximal chromosome 5 imbalances

• Autorzy: Melo J. B. , Backx L. , Vermeesch J. R. , Santos H. G. , Sousa A. C. , Kosyakova N. , Weise A. , von Eggeling F. , Liehr T. , Carreira I. M.
• Języki publikacji: EN

Abstrakty

EN

Small supernumerary marker chromosomes (sSMC) are a morphological heterogeneous group of additional abnormal chromosomes that cannot be characterized alone by conventional banding cytogenetics. Molecular cytogenetic techniques are valuable tools for the accurate identification of sSMC and a prerequisite for sound genetic counseling based on refined genotype/phenotype correlation. We describe a new case of a retarded patient with an sSMC derived from chromosome 5. The characterization of the sSMC was done by subcentromere-specific multicolor (subcenM) fluorescence in-situ hybridization (FISH) and by full tilling resolution array analysis, after microdissection and amplification of the marker DNA. Uniparental disomy for normal sister chromosomes of the sSMC(5) was excluded. The karyotype was mos47,XX,+r(5)(::p11.1 → q12.1::)[70%]/46,XX[30%], being the trisomic region between 46.15 ∼ 49.56 Mb and 61.25 ∼ 61.335 Mb, a region known to harbor ∼45 annotated genes. Together with a review of the previously described cases of sSMC(5) and duplications involving the 5q proximal region, we can conclude that trisomy of the 5q11 region is associated with learning difficulties and speech delay.

• Wydawca: -
• Czasopismo: Journal of Applied Genetics
• Rocznik: 2011
• Tom: 52
• Numer: 2
• Opis fizyczny: p.193-200,fig.,ref.

Twórcy

autor

Melo J. B.

• Laboratorio de Citogenetica e Genomica, Centro de Neurociencias e Biologia Celular, Faculty of Medicine, University of Coimbra, 3000-354 Coimbra, Portugal

autor

Backx L.

autor

Vermeesch J. R.

autor

Santos H. G.

autor

Sousa A. C.

autor

Kosyakova N.

autor

Weise A.

autor

von Eggeling F.

autor

Liehr T.

autor

Carreira I. M.

Uwagi

PL

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