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. 2001 Jul;85(1):69–73. doi: 10.1054/bjoc.2001.1853

Adenomatous polyposis coli (APC) gene promoter hypermethylation in primary breast cancers

Z Jin 1, G Tamura 1, T Tsuchiya 1, K Sakata 1, M Kashiwaba 2, M Osakabe 1, T Motoyama 1
PMCID: PMC2363914  PMID: 11437404

Abstract

Similar to findings in colorectal cancers, it has been suggested that disruption of the adenomatous polyposis coli (APC)/β-catenin pathway may be involved in breast carcinogenesis. However, somatic mutations of APC and β- catenin are infrequently reported in breast cancers, in contrast to findings in colorectal cancers. To further explore the role of the APC/β-catenin pathway in breast carcinogenesis, we investigated the status of APC gene promoter methylation in primary breast cancers and in their non-cancerous breast tissue counterparts, as well as mutations of the APC and β- catenin genes. Hypermethylation of the APC promoter CpG island was detected in 18 of 50 (36%) primary breast cancers and in none of 21 non-cancerous breast tissue samples, although no mutations of the APC and β- catenin were found. No significant associations between APC promoter hypermethylation and patient age, lymph node metastasis, oestrogen and progesterone receptor status, size, stage or histological type of tumour were observed. These results indicate that APC promoter CpG island hypermethylation is a cancer-specific change and may be a more common mechanism of inactivation of this tumour suppressor gene in primary breast cancers than previously suspected. © 2001 Cancer Research Campaign http://www.bjcancer.com

Keywords: hypermethylation, APC, breast cancer, methylation-specific PCR

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Selected References

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