DNA Instability at Chromosomal Fragile Sites in Cancer
نویسندگان
چکیده
منابع مشابه
DNA Instability at Chromosomal Fragile Sites in Cancer
Human chromosomal fragile sites are specific genomic regions which exhibit gaps or breaks on metaphase chromosomes following conditions of partial replication stress. Fragile sites often coincide with genes that are frequently rearranged or deleted in human cancers, with over half of cancer-specific translocations containing breakpoints within fragile sites. But until recently, little direct ev...
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Seckel syndrome (SCKL) is a rare, genetically heterogeneous disorder, with dysmorphic facial appearance, growth retardation, microcephaly, mental retardation, variable chromosomal instability, and hematological disorders. To date, three loci have been linked to this syndrome, and recently, the gene encoding ataxia-telangiectasia and Rad3-related protein (ATR) was identified as the gene mutated ...
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It has been proposed that common aphidicolin-inducible fragile sites, in general, predispose to specific chromosomal breakage associated with deletion, amplification, and/or translocation in certain forms of cancer. Although this appears to be the case for the fragile site FRA3B and may be the case for FRA7G, it is not yet clear whether this association is a general property of this class of fr...
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DNA has the ability to form a variety of secondary structures that can interfere with normal cellular processes, and many of these structures have been associated with neurological diseases and cancer. Secondary structure-forming sequences are often found at chromosomal fragile sites, which are hotspots for sister chromatid exchange, chromosomal translocations, and deletions. Structures formed ...
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I T IS NOW WELL established that human tumors, particularly leukemias and lymphomas, are characterized by nonrandom chromosomal abnormalities. During the past 2 years, a number of proto-oncogenes and transforming genes have been mapped to the chromosomal breakpoints involved in the specific structural rearrangements. Experimental evidence obtained recently suggests that the genes located at the...
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ژورنال
عنوان ژورنال: Current Genomics
سال: 2010
ISSN: 1389-2029
DOI: 10.2174/138920210791616699