Purpose. Using a genome-wide array-based comparative genomic hybridization (array-CGH), DNA copy number changes in uterine leiomyosarcoma were analyzed. Materials and methods. We analyzed 4 cases of uterine leiomyoma ...Purpose. Using a genome-wide array-based comparative genomic hybridization (array-CGH), DNA copy number changes in uterine leiomyosarcoma were analyzed. Materials and methods. We analyzed 4 cases of uterine leiomyoma and 7 cases of uterine leiomyosarcoma. The paraffin-fixed tissue samples were microdissected under microscope and DNA was extracted. Array-based CGH and fluorescence in situ hybridization (FISH) were carried out with Genome database (Gene Ontology). Results. Uterine leiomyoma showed no genetic alterations, while all of 7 cases of uterine leiomyosarcoma showed specific gains and losses. The percentage of average gains and losses were 4.86%and 15.1%, respectively. The regions of high level of gain were 7q36.3, 7q33-q35, 12q13-12q15, and 12q23.3. And the regions of homozygous loss were 1p21.1, 2p22.2, 6p11.2, 9p21.1, 9p21.3, 9p22.1, 14q32.33, and 14q32.33 qter. There were no recurrent regions of gain, but recurrent regions of loss were 1p21.1-p21.2, 1p22.3-p31.1,9p21.2-p22.2,10q25-q25.2, 11q24.2-q25, 13q12-q12.13, 14q31.1-q31.3, 14q32.32-q32.33, 15q11-q12, 15q13-q14, 18q12.1-q12.2, 18q22.1-q22.3, 20p12.1, and 21q22.12-q22.13. In the high level of gain regions, BAC clones encoded HMGIC, SAS, MDM2, TIM1 genes. Frequently gained BAC clone-encoded genes were TIM1, PDGFR-β, REC Q4, VAV2, FGF4, KLK2, PNUTL1, GDNF, FLG, EXT1, WISP1, HER-2, and SOX18. The genes encoded by frequently lost BAC clones were LEU1, ERCC5, THBS1, DCC, MBD2, SCCA1, FVT1, CYB5, and ETS2/E2. A subset of cellular processes from each gene was clustered by Gene Ontology database. Conclusion. Using array-CGH, chromosomal aberrations related to uterine leiomyosarcoma were identified. The high resolution of array-CGH combined with human genome database would give a chance to find out possible target genes present in the gained or lost clones.展开更多
全基因组芯片已被推荐作为分析智力障碍、孤独症、多发性出生缺陷病因的首要筛查手段,通过芯片检查发现了人类基因组中大量的拷贝数变异(copy number variation,CNV),这些变异中既有正常个体的多态性,也有新发的致病性变异。为帮助临床...全基因组芯片已被推荐作为分析智力障碍、孤独症、多发性出生缺陷病因的首要筛查手段,通过芯片检查发现了人类基因组中大量的拷贝数变异(copy number variation,CNV),这些变异中既有正常个体的多态性,也有新发的致病性变异。为帮助临床实验室对芯片结果的解读保持一致性,美国医学遗传学会制定了此有关CNV的解读指南。该指南主要应用于产后的分子遗传诊断中。展开更多
染色体异常包括数目异常和结构异常,后者包括染色体片段的缺失、重复和易位。为区别于基因的突变,将1kb以上的染色体变异称为基因拷贝数变异(copy number variation,CNV)。研究发现,染色体的微缺失和微重复是先天性畸形、生长发...染色体异常包括数目异常和结构异常,后者包括染色体片段的缺失、重复和易位。为区别于基因的突变,将1kb以上的染色体变异称为基因拷贝数变异(copy number variation,CNV)。研究发现,染色体的微缺失和微重复是先天性畸形、生长发育迟缓、复发性流产及其他遗传综合征的主要原因。展开更多
文摘Purpose. Using a genome-wide array-based comparative genomic hybridization (array-CGH), DNA copy number changes in uterine leiomyosarcoma were analyzed. Materials and methods. We analyzed 4 cases of uterine leiomyoma and 7 cases of uterine leiomyosarcoma. The paraffin-fixed tissue samples were microdissected under microscope and DNA was extracted. Array-based CGH and fluorescence in situ hybridization (FISH) were carried out with Genome database (Gene Ontology). Results. Uterine leiomyoma showed no genetic alterations, while all of 7 cases of uterine leiomyosarcoma showed specific gains and losses. The percentage of average gains and losses were 4.86%and 15.1%, respectively. The regions of high level of gain were 7q36.3, 7q33-q35, 12q13-12q15, and 12q23.3. And the regions of homozygous loss were 1p21.1, 2p22.2, 6p11.2, 9p21.1, 9p21.3, 9p22.1, 14q32.33, and 14q32.33 qter. There were no recurrent regions of gain, but recurrent regions of loss were 1p21.1-p21.2, 1p22.3-p31.1,9p21.2-p22.2,10q25-q25.2, 11q24.2-q25, 13q12-q12.13, 14q31.1-q31.3, 14q32.32-q32.33, 15q11-q12, 15q13-q14, 18q12.1-q12.2, 18q22.1-q22.3, 20p12.1, and 21q22.12-q22.13. In the high level of gain regions, BAC clones encoded HMGIC, SAS, MDM2, TIM1 genes. Frequently gained BAC clone-encoded genes were TIM1, PDGFR-β, REC Q4, VAV2, FGF4, KLK2, PNUTL1, GDNF, FLG, EXT1, WISP1, HER-2, and SOX18. The genes encoded by frequently lost BAC clones were LEU1, ERCC5, THBS1, DCC, MBD2, SCCA1, FVT1, CYB5, and ETS2/E2. A subset of cellular processes from each gene was clustered by Gene Ontology database. Conclusion. Using array-CGH, chromosomal aberrations related to uterine leiomyosarcoma were identified. The high resolution of array-CGH combined with human genome database would give a chance to find out possible target genes present in the gained or lost clones.
文摘全基因组芯片已被推荐作为分析智力障碍、孤独症、多发性出生缺陷病因的首要筛查手段,通过芯片检查发现了人类基因组中大量的拷贝数变异(copy number variation,CNV),这些变异中既有正常个体的多态性,也有新发的致病性变异。为帮助临床实验室对芯片结果的解读保持一致性,美国医学遗传学会制定了此有关CNV的解读指南。该指南主要应用于产后的分子遗传诊断中。