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Complement inhibitor CSMD1 acts as tumor suppressor in human breast cancer

Escudero-Esparza, Astrid, Bartoschek, Michael, Gialeli, Chrysostomi, Okroj, Marcin, Owen, Sioned, Jirström, Karin, Orimo, Akira, Jiang, Wen Guo, Pietras, Kristian and Blom, Anna M. 2016. Complement inhibitor CSMD1 acts as tumor suppressor in human breast cancer. Oncotarget 7 , pp. 76920-76933. 10.18632/oncotarget.12729

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Abstract

Human CUB and Sushi multiple domains 1 (CSMD1) is a membrane-bound complement inhibitor suggested to act as a putative tumor suppressor gene, since allelic loss of this region encompassing 8p23 including CSMD1 characterizes various malignancies. Here, we assessed the role of CSMD1 as a tumor suppressor gene in the development of breast cancer in vitro and in vivo. We found that human breast tumor tissues expressed CSMD1 at lower levels compared to that in normal mammary tissues. The decreased expression of CSMD1 was linked to a shorter overall survival of breast cancer patients. We also revealed that expression of CSMD1 in human breast cancer cells BT-20 and MDA-MB-231 significantly inhibited their malignant phenotypes, including migration, adhesion and invasion. Conversely, stable silencing of CSMD1 expression in T47D cells enhanced cancer cell migratory, adherent and clonogenic abilities. Moreover, expression of CSMD1 in the highly invasive MDA-MB-231 cells diminished their signaling potential as well as their stem cell-like properties as assessed by measurement of aldehyde dehydrogenase activity. In a xenograft model, expression of CSMD1 blocked the ability of cancer cells to metastasize to secondary sites in vivo, likely via inhibiting local invasion but not the extravasation into distant tissues. Taken together, these findings demonstrate the role of CSMD1 as a tumor suppressor gene in breast cancer.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Subjects: R Medicine > RC Internal medicine > RC0254 Neoplasms. Tumors. Oncology (including Cancer)
Publisher: Impact Journals LLC
ISSN: 1949-2553
Funders: Cancer Research Wales, Cardiff China Medical Scholarship, NRN/Ser Cymru
Date of First Compliant Deposit: 24 October 2016
Date of Acceptance: 11 October 2016
Last Modified: 18 Jun 2019 13:29
URI: http://orca-mwe.cf.ac.uk/id/eprint/95525

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