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  • Oncogenomics
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Isolation of HELAD1, a novel human helicase gene up-regulated in colorectal carcinomas

Abstract

To investigate the mechanisms of colorectal carcinogenesis, we searched for genes regulated by adenomatous polyposis coli gene product (APC) and identified a novel gene, termed HELAD1 (helicase, APC down-regulated 1). A recombinant polypeptide representing the ATPases associated with cellular activities (AAA) domain of the HELAD1 product showed 3′ to 5′ helicase activity and exonuclease activity in vitro. HELAD1 was abundantly expressed in 16 of 20 colon cancers examined but hardly detectable in corresponding non-cancerous mucosae. Treatment of colon-cancer cells with antisense oligonucleotides suppressed its expression and induced apoptosis. These data revealed an importance of HELAD1 in colorectal carcinogenesis and suggest that suppression of HELAD1 may be a promising therapeutic strategy.

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Acknowledgements

We are grateful to Ms Makino, Ms Yamane and Ms Nakajima for technical assistance. This work was supported by a ‘Research for the Future’ Program Grant (00L01402) from the Japan Society for the Promotion of Science.

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Correspondence to Yusuke Nakamura.

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Ishiguro, H., Shimokawa, T., Tsunoda, T. et al. Isolation of HELAD1, a novel human helicase gene up-regulated in colorectal carcinomas. Oncogene 21, 6387–6394 (2002). https://doi.org/10.1038/sj.onc.1205751

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