Abstract:
:Alterations of gene expression in squamous cell carcinoma (SCC) cell lines derived from the larynx and keratinocytes derived from adjacent normal mucosa of the larynx have been studied using the mRNA differential display technique. Lane-to-lane comparison of reverse transcribed mRNA showed a strong repression of a 148 bp fragment in SCC cells. The fragment was reamplified and cloned. Sequencing revealed a 99.3% homology with a region in exon 17 of the human galactocerebrosidase (GALC) gene. Northern blot analysis confirmed the differential expression of this gene in both carcinoma cell lines and laryngeal SCC biopsies in contrast with corresponding normal mucosa. To provide further evidence for the differential expression rate, both types of cells were transiently transfected with a 152 bp (-176 to -24) high regulatory promoter element of the 5' flanking region of the GALC gene. Results of 3 independent transfection experiments indicated a 16-fold repression of the GALC gene expression in SCC cells compared with benign keratinocytes. However, neither mutation nor other alterations of the promoter sequence were detected. Expression of the GALC gene is thus greatly affected in SCCs of the larynx.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Görögh T,Rudert H,Lippert BM,Gottschlich S,Maune S,Heidorn K,Maass J,Hoffmann M,Meyer JE,Rathcke IO,Folz BJ,Hortobagyi T,Werner JAdoi
10.1002/(sici)1097-0215(19991210)83:6<750::aid-ijckeywords:
subject
Has Abstractpub_date
1999-12-10 00:00:00pages
750-4issue
6eissn
0020-7136issn
1097-0215pii
10.1002/(SICI)1097-0215(19991210)83:6<750::AID-IJCjournal_volume
83pub_type
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