Abstract:
:To facilitate transcript mapping and to investigate alterations in genomic structure and gene expression in a defined genomic target, we developed a novel microarray-based method to detect transcriptional activity of the human chromosome 4q22-24 region. Loss of heterozygosity of human 4q22-24 is frequently observed in hepatocellular carcinoma (HCC). One hundred and eighteen well-characterized genes have been identified from this region. We took previously sequenced shotgun subclones as templates to amplify overlapping sequences for the genomic segment and constructed a chromosome-region-specific microarray. Using genomic DNA fragments as probes, we detected transcriptional activity from within this region among five different tissues. The hybridization results indicate that there are new transcripts that have not yet been identified by other methods. The existence of new transcripts encoded by genes in this region was confirmed by PCR cloning or cDNA library screening. The procedure reported here allows coupling of shotgun sequencing with transcript mapping and, potentially, detailed analysis of gene expression and chromosomal copy of the genomic sequence for the putative HCC tumor suppressor gene(s) in the 4q candidate region.
journal_name
Nucleic Acids Resjournal_title
Nucleic acids researchauthors
Li LH,Li JC,Lin YF,Lin CY,Chen CY,Tsai SFdoi
10.1093/nar/gnh025keywords:
subject
Has Abstractpub_date
2004-02-11 00:00:00pages
e27issue
3eissn
0305-1048issn
1362-4962pii
32/3/e27journal_volume
32pub_type
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