Fiber-fluorescence in situ hybridization analyses as a diagnostic application for orientation of microduplications

• 作者: Keiko Shimojima Shino Shimada Toshiyuki Yamamoto
• 来源期刊: 世界医学遗传学杂志
• 学科: 医学
• 关键词: CHROMOSOMAL microarray testing COPY number variation Fiber-fluorescence in situ hybridization MICRODUPLICATION Tandem ORIENTATION
• 年，卷（期）: 2013,（2）
• 页码范围: 5-8
• 页数: 4页
• 分类号: R

摘要

Microduplications are normally invisible under microscopy and were not recognized before chromosomal microarray testing was available.Although it is difficult to confirm the orientation of duplicated segments by standard fluorescence in situ hybridization(FISH),our data indicates that fiber-FISH analysis has the potential to reveal the orientation of duplicated and triplicated segments of chromosomes.Recurrent microduplications reciprocal to microdeletions show tandem orientations of the duplicated segments,which is consistent with a non-allelic homologous recombination mechanism.Several random duplications showed tandem configurations and inverted duplications are rare.Further analysis is required to fully elucidate the basic mechanisms underlying such duplications/triplications.