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. 1990 Nov;87(21):8602–8606. doi: 10.1073/pnas.87.21.8602

Identical splicing of aberrant epidermal growth factor receptor transcripts from amplified rearranged genes in human glioblastomas.

N Sugawa 1, A J Ekstrand 1, C D James 1, V P Collins 1
PMCID: PMC55005  PMID: 2236070

Abstract

The epidermal growth factor receptor gene has been found to be amplified and rearranged in human glioblastomas in vivo. Here we present the sequence across a splice junction of aberrant epidermal growth factor receptor transcripts derived from corresponding and uniquely rearranged genes that are coamplified and coexpressed with non-rearranged epidermal growth factor receptor genes in six primary human glioblastomas. Each of these six tumors contains aberrant transcripts derived from identical splicing of exon 1 to exon 8 as a consequence of a deletion-rearrangement of the amplified gene, the extent of which is variable among these tumors. In spite of this intertumoral variability, each intragenic rearrangement results in loss of the same 801 coding bases (exons 2-7) and creation of a new codon at the novel splice site in their corresponding transcripts. These rearrangements do not, however, affect the mRNA sequence for the signal peptide, the first five codons, or the reading frame downstream of the rearrangement.

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Selected References

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