Osteopontin Overexpression Induced Tumor Progression and Chemoresistance to Oxaliplatin through Induction of Stem-Like Properties in Human Colorectal Cancer. (27th May 2015)

• Record Type: Journal Article
• Authors: Ng, Lui; Wan, Timothy; Chow, Ariel; Iyer, Deepak; Man, Johnny; Chen, Guanghua; Yau, Thomas Chung-Cheung; Lo, Oswens; Foo, Chi-Chung; Poon, Jensen Tung-Chung; Poon, Ronnie Tung-Ping; Pang, Roberta; Law, Wai-Lun
• Other Names: Ma Yupo Academic Editor.
• Is Part Of: Stem cells international. Volume 2015(2015)
• Publication Date: 2015-05-27
• Subjects: Stem Cells -- Periodicals; Stem Cells -- Therapeutic use -- Periodicals; Stem Cells -- Transplantation -- Periodicals; 616.0277405
• DOI: 10.1155/2015/247892
• Languages: English
• ISSNs: 1687-966X

Abstract

Abstract : Colorectal cancer (CRC) is one of the most common and fatal malignancies worldwide. The poor prognosis of colorectal cancer patients is due to development of chemoresistance and cancer metastasis. Recently osteopontin (OPN) has been associated with stem-like properties in colorectal cancer. This study further examined the clinicopathological significance of OPN in CRC and its effect on chemoresistance and transcription of stem cell markers. We examined the transcription level of OPN in 84 CRC patients and correlated the expression with their clinicopathological parameters. The associations of OPN overexpression with transcription of stem cell markers and response to chemotherapy in DLD1-OPN overexpressing clones and CRC patients were also investigated. Our results showed that OPN was significantly overexpressed in CRC, and its overexpression correlated with tumor stage and poor prognosis. Overexpression of CRC induced OCT4 and SOX2 expression in vitro and correlated with SOX2 overexpression in CRC patients. In addition, DLD1-OPN overexpressing cells showed enhanced ability to survive upon oxaliplatin treatment, and OPN expression was higher in CRC patients who were resistant to oxaliplatin-involved chemotherapy treatment. Thus, CRC cells overexpressing OPN demonstrated stem-like properties and OPN inhibition is a potential therapeutic approach to combat CRC progression and chemoresistance.