S100A8 and S100A9 Are Associated with Colorectal Carcinoma Progression and Contribute to Colorectal Carcinoma Cell Survival and Migration via Wnt/β-Catenin Pathway

• DOI: 10.1371/journal.pone.0062092
• Publication Date: 2013-04-26T17:10:44Z
• Authors: Liang Duan; Rui Wu; Liwei Ye; Haiyan Wang; Xia Yang; Yunyuan Zhang; Xian Chen; Guowei Zuo; Yan Zhang; Yaguang Weng; Jinyong Luo; Min Tang; Qiong Shi; Tongchuan He; Lan Zhou
• Keywords: Male; 0301 basic medicine; Cell Survival; Science; 610; Proto-Oncogene Proteins c-myc; 03 medical and health sciences; Cell Movement; Cell Line, Tumor; Calgranulin B; Humans; Calgranulin A; Wnt Signaling Pathway; beta Catenin; Aged; Q; R; Middle Aged; Recombinant Proteins; Up-Regulation; 3. Good health; HEK293 Cells; Matrix Metalloproteinase 7; Disease Progression; Medicine; Female; Colorectal Neoplasms; Research Article

S100A8 and S100A9, two members of the S100 protein family, have been reported in association with the tumor cell differentiation and tumor progression. Previous study has showed that their expression in stromal cells of colorectal carcinoma (CRC) is associated with tumor size. Here, we investigated the clinical significances of S100A8 and S100A9 in tumor cells of CRC and their underlying molecular mechanisms.Expression of S100A8 and S100A9 in colorectal carcinoma and matching distal normal tissues were measured by reverse transcriptase polymerase chain reaction (RT-PCR), immunohistochemistry and western blot. CRC cell lines treated with the recombinant S100A8 and S100A9 proteins were used to analyze the roles and molecular mechanisms of the two proteins in CRC in vitro.S100A8 and S100A9 were elevated in more than 50% of CRC tissues and their expression in tumor cells was associated with differentiation, Dukes stage and lymph node metastasis. The CRC cell lines treatment with recombinant S100A8 and S100A9 proteins promoted the viability and migration of CRC cells. Furthermore, the two recombinant proteins also resulted in the increased levels of β-catenin and its target genes c-myc and MMP7. β-catenin over-expression in CRC cells by Adβ-catenin increased cell viability and migration. β-catenin knock-down by Adsiβ-catenin reduced cell viability and migration. Furthermore, β-catenin knockdown also partially abolished the promotive effects of recombinant S100A8 and S100A9 proteins on the viability and migration of CRC cells.Our work demonstrated that S100A8 and S100A9 are linked to the CRC progression, and one of the underlying molecular mechanisms is that extracellular S100A8 and S100A9 proteins contribute to colorectal carcinoma cell survival and migration via Wnt/β-catenin pathway.