title: [Identification of chromosomal aberration in esophageal cancer cells by mixed BAC DNA probes of chromosome arms and regions].
abstract: Chromosomal aberration is an important genetic feature of malignant tumor cells. This study aimed to clarify whether BAC DNA could be used to identify chromosome region and arm alterations. For each chromosome region, five to ten 1 Mb BAC DNA clones were selected to construct mixed BAC DNA clones for the particular region. All of the mixed clones from regions which could cover the whole chromosome arm were then mixed to construct mixed BAC DNA clones for the arms. Mixed BAC DNA probes of arms and regions were labeled by degenerate oligonucleotide primed PCR (DOP-PCR) and Nick translation techniques, respectively. The specificities of these probes were validated by fluorescence in situ hybridization (FISH) on the metaphase chromosomes of normal human peripheral blood lymphocytes. FISH with arm-specific mixed BAC DNA probes showed that chromosomal rearrangements and involved chromosome arms were confirmed in several esophageal cancer cells. By using region-specific mixed probes, the breakpoint on 1q from the derivative chromosome t(1q;7q) was identified in 1q32-q41 in esophageal KYSE140 cells. In conclusion, we established an effective labeling method for 1 Mb BAC DNA mixed clone probes, and chromosome arm and region rearrangements could be identified in several esophageal cancer cells by using these probes. Our study provides a more precise method for identification of chromosomal aberration by M-FISH, and the established method may also be applied to the karyotype analysis of hematological malignancies and prenatal diagnosis.
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Jiajie
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China; Department of Histology and Embryology, Anhui Medical University, Hefei 230032, China;
authors.forename: Wang
authors.initials: W
authors.lastname: Chunli
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China; Department of Pathology, Yancheng Third People's Hospital, Yancheng 224001, China;
authors.forename: Gu
authors.initials: G
authors.lastname: Wenyue
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Xiaoyu
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.
authors.forename: Xu
authors.initials: X
authors.lastname: Xin
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.
authors.forename: Cai
authors.initials: C
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Molecular Oncology, Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100021, China.
authors.forename: Wang
authors.initials: W
authors.lastname: Mingrong
mesh_terms: D002869:Chromosome Aberrations; D022202:Chromosomes, Artificial, Bacterial / Q000235:genetics*; D002877:Chromosomes, Human / Q000235:genetics*; D015342:DNA Probes / Q000235:genetics*; D004938:Esophageal Neoplasms / Q000235:genetics*; D006801:Humans; D017404:In Situ Hybridization, Fluorescence
chemical_list: D015342:DNA Probes