نتایج جستجو برای: somatic mutation
تعداد نتایج: 325275 فیلتر نتایج به سال:
Somatic mosaicism refers to the occurrence of two genetically distinct populations of cells within an individual, derived from a postzygotic mutation. In contrast to inherited mutations, somatic mosaic mutations may affect only a portion of the body and are not transmitted to progeny. These mutations affect varying genomic sizes ranging from single nucleotides to entire chromosomes and have bee...
BACKGROUND Genetic studies have largely concentrated on the impact of somatic mutations found in coding regions, and have neglected mutations outside of these. However, 3' untranslated regions (3' UTR) mutations can also disrupt or create miRNA target sites, and trigger oncogene activation or tumor suppressor inactivation. METHODS We used next-generation sequencing to widely screen for geneti...
Next generation sequencing (NGS) has enabled high throughput discovery of somatic mutations. Detection depends on experimental design, lab platforms, parameters and analysis algorithms. However, NGS-based somatic mutation detection is prone to erroneous calls, with reported validation rates near 54% and congruence between algorithms less than 50%. Here, we developed an algorithm to assign a sin...
The germline mutation rate has been extensively studied and has been found to vary greatly between species, but much less is known about the somatic mutation rate in multicellular organisms, which remains very difficult to determine. Here, we present data on somatic mutation rates in mice and humans, obtained by sequencing single cells and clones derived from primary fibroblasts, which allows u...
The relative contributions of germline gene variation and somatic mutation to immunoglobulin diversity were studied by comparing germline gene sequences with their rearranged counterparts for the mouse VH, V kappa, and V lambda genes. The mutation rate at the amino acid level was estimated to be 7.0% in the first and second complementarity-determining regions (CDRs) and 2.0% in the framework re...
abstract objective: detection of p53 gene mutation on its codon 248 between iranian women with breast cancer by pcr-rflp. material and methods: dna extraction of tumor tissues was performed in 53 patients with primary breast cancer. designing primer for the sub-studying codon was performed with nti-vector software and detection of codon 248 mutation was done by msp i pcr_rflp. results: the soma...
Somatic mosaicism is well known in disorders where the manifestations are readily seen, e.g. the skin in neurofibromatosis I. In single gene disorders of higher frequency, especially X-linked ones, the frequency of combined germ-line and somatic mosaicism is increasingly being appreciated, e.g. Duchenne Muscular Dystrophy. Cell separation techniques; such as the fluorescence-activated cell sort...
Isolated macrodactyly (OMIM 155500) belongs to a heterogeneous group of overgrowth syndromes. It is a congenital anomaly resulting in enlargement of all tissues localized to the terminal portions of a limb and caused by somatic mutations in the phosphatidylinositol 3-kinase catalytic alpha (PIK3CA, OMIM 171834) gene. Here we report a Hungarian girl with macrodactyly and syndactyly. Genetic scre...
Somatic mutation calling from next-generation sequencing data remains a challenge due to the difficulties of distinguishing true somatic events from artifacts arising from PCR, sequencing errors or mis-mapping. Tumor cellularity or purity, sub-clonality and copy number changes also confound the identification of true somatic events against a background of germline variants. We have developed a ...
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