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- W1577136965 abstract "Abstract : HER-2/neu is a potent oncogene that predicts poor outcome when overexpressed in ovarian cancer. The SKOV-3 ovarian carcinoma cell line, one of the only models for HER2-driven ovarian cancer, expresses a major uncharacterized 8 kb alternative HER-2 transcript. The aim of this study was to characterize the structure, determine the origin of the alternative sequence, and examine the possible role of the 8 kb alternative transcript in overexpression of the HER-2 gene. The structure of the 8 kb transcript was investigated using the polymerase chain reaction (PCR) and nucleotide sequencing of cDNA clones. PCR analysis of genomic DNA was used to assess the origin of the 8 kb transcript. The stability of the 8 kb mRNA was assessed by Northern blot analysis of RNA extracted from cells treated with transcriptional inhibitors. Similar 5'UTR and coding sequence but an extended 3'UTR was contained in the 8 kb compared to the well-characterized 4.5 kb HER-2 transcript. Genomic DNA had continuity between the novel 3'UTR sequence from the 8 kb transcript and adjacent HER-2 terminal exon sequence. The 8 kb transcript had a half-life of 13 h compared to 5.5 h for the 4.5 kb transcript (p < 0.01). The 8 kb transcript is generated from alternative polyadenylation site usage rather than gene rearrangement. Since the 8 kb transcript contains alternative sequence found at the 3'end of the normal HER-2 gene, it could be expressed in other cells. Increased stability of the 8 kb transcript may confer a selective advantage for SKOV-3 cells by providing enhanced HER-2 expression." @default.
- W1577136965 created "2016-06-24" @default.
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- W1577136965 date "1996-08-01" @default.
- W1577136965 modified "2023-09-27" @default.
- W1577136965 title "Her-2/Neu and Breast Cancer." @default.
- W1577136965 doi "https://doi.org/10.21236/ada315806" @default.
- W1577136965 hasPublicationYear "1996" @default.
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