Abstract:
:High BCAR1/p130Cas expression in primary breast tumour cytosol predicts a poor chance of response recurrent disease to tamoxifen treatment in patients with oestrogen receptor (ER)-positive breast carcinomas. In this study, we assessed whether BCAR1/p130Cas expression is altered during acquisition of anti-oestrogen resistance. BCAR1/p130Cas protein was quantitatively measured by chemiluminescent Western blot analysis in the cytosol of 34 predominantly ER(+) carcinomas that initially responded to primary tamoxifen treatment and subsequently progressed (n = 22 ) or developed during adjuvant tamoxifen treatment (n = 12) and compared to 54 untreated ER(+) human breast carcinomas. We did not detect significant differences in the level of BCAR1/p130Cas protein in untreated and acquired tamoxifen-resistant carcinomas. Our results indicate that in tumour progression towards tamoxifen resistance, increase of BCAR1/p130Cas may be only one of the molecular mechanisms. Thus, high BCAR1/p130Cas protein levels appear to be a hallmark for intrinsic resistance to tamoxifen in breast carcinomas.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
van der Flier S,Chan CM,Brinkman A,Smid M,Johnston SR,Dorssers LC,Dowsett Mdoi
10.1002/1097-0215(20000920)89:5<465::aid-ijc11>3.0keywords:
subject
Has Abstractpub_date
2000-09-20 00:00:00pages
465-8issue
5eissn
0020-7136issn
1097-0215pii
10.1002/1097-0215(20000920)89:5<465::AID-IJC11>3.0journal_volume
89pub_type
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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abstract::CpG island methylator phenotype (CIMP) involves the targeting of multiple genes by promoter hypermethylation. Telomerase plays an important role in the development of cellular immortality and oncogenesis. To gain insight into the role of epigenetic aberration of telomerase-related genes in hepatocarcinogenesis, we det...
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