نتایج جستجو برای: small supernumerary marker chromosome ssmc
تعداد نتایج: 1015567 فیلتر نتایج به سال:
Molecular characterization of breakpoints of chromosomal rearrangements is a successful strategy for the identification of candidate disease genes. Mapping translocation breakpoints and rearranged chromosomal boundaries is labor intensive and/or time consuming. Here, we present a novel and rapid procedure to map such chromosomal breakpoints by hybridizing amplified microdissection derived DNA o...
Abstract Background The presence of small supernumerary marker chromosomes (sSMCs) in a karyotype leads to diagnostic questions because the resulting extra material may cause abnormal development depending on origin duplication/triplication. Because SMCs are so small, their cannot be determined by conventional cytogenetic techniques, and new molecular methods necessary. Here, we applied target ...
By random amplification of a microdissected chromosome using the degenerate oligonucleotide primed polymerase chain reaction (DOP-PCR) and forward painting (microFISH), we characterised an extra structurally abnormal chromosome (ESAC) or supernumerary marker chromosome in a mentally retarded girl with a pattern of dysmorphic features. It could be clearly shown that the small marker chromosome o...
By random amplification of a microdissected chromosome using the degenerate oligonucleotide primed polymerase chain reaction (DOP-PCR) and forward painting (microFISH), we characterised an extra structurally abnormal chromosome (ESAC) or supernumerary marker chromosome in a mentally retarded girl with a pattern of dysmorphic features. It could be clearly shown that the small marker chromosome o...
the interpretation of supernumerary chromosome is important for genetic counseling and prognosis. here, we used snp array and conventional karyotyping method to identify a denovo marker chromosome originated from chromosome 22 and 11 in a newborn transferred to the neonatal intensive care unit of shahid sadoughi hospital in 2015. clinical abnormalities identified in the newborn were dysmorphic...
Small supernumerary marker chromosomes (sSMCs) cannot be identified or characterized unambiguously by conventional cytogenetic banding techniques. Until recently, the large variety of marker chromosomes, as well as the limitations in their identification, have presented a diagnostic problem. In order to determine the origin of sSMCs, we used a variety of fluorescence in situ hybridization (FISH...
sSMCs are a major clinical problem, especially when detected prenatally during cytogenetic analysis. The risk for an abnormal phenotype in prenatally ascertained de novo cases with sSMC is ~13%. This has been refined to 7% for sSMC from acrocentric autosomes (excluding 15s) compared with ∼28% for nonacrocentric autosomes [4] and 30% for all sSMC carriers [1]. Strikingly, 30-50% of pregnancies d...
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