Int J Biol Sci 2019; 15(13):2885-2896. doi:10.7150/ijbs.38041

Research Paper

LncRNA SLCO4A1-AS1 predicts poor prognosis and promotes proliferation and metastasis via the EGFR/MAPK pathway in colorectal cancer

Rui Tang1,2,3, Junhong Chen1,2,3, Mengtian Tang1,2,3, Zhiqiang Liao1,2,3, Lianqing Zhou1, Jiarui Jiang1,3, Yingbin Hu1,3, QianJin Liao1,4, Wei Xiong1,5, Yanyan Tang1,3,4✉, Shaolin Nie1,3✉

1. Hunan Cancer Hospital and The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China.
2. The University of South China, Hengyang, China
3. Department of Colorectal Surgery, Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, China
4. Central Laboratory, The Affiliated Cancer Hospital of Xiangya Medical School, Central South University, Changsha, China
5. The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha, Hunan, China

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Citation:
Tang R, Chen J, Tang M, Liao Z, Zhou L, Jiang J, Hu Y, Liao Q, Xiong W, Tang Y, Nie S. LncRNA SLCO4A1-AS1 predicts poor prognosis and promotes proliferation and metastasis via the EGFR/MAPK pathway in colorectal cancer. Int J Biol Sci 2019; 15(13):2885-2896. doi:10.7150/ijbs.38041. Available from http://www.ijbs.com/v15p2885.htm

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Abstract

It is universally acknowledged that long non-coding RNAs (lncRNAs) involved in tumorigenesis in human cancers. However, the function and mechanism of many lncRNAs in colorectal cancer (CRC) remain unclear. By analyzing the two sets of CRC-related gene microarrays data, downloaded from the Gene Expression Omnibus (GEO) database and the lncRNA expression in a set of RNA sequencing data, we found that lncRNA SLCO4A1-AS1 was significantly upregulated in CRC tissues. We then collected CRC tissue samples and verified that SLCO4A1-AS1 is highly expressed in CRC tissues. Furthermore, SLCO4A1-AS1 was also upregulated in the CRC cell line. In situ hybridization results showed that high expression of SLCO4A1-AS1 was associated with poor prognosis in patients with CRC. Next, we found that SLCO4A1-AS1 promoted CRC cell proliferation, migration, and invasion. Results of western blotting assays show that its mechanism may relate to the epidermal growth factor receptor (EGFR)/mitogen-activated protein kinase (MAPK) pathway. Therefore, SLCO4A1-AS1 may be a potential biomarker for CRC prognosis and a new target for colorectal cancer therapy.

Keywords: long non-coding RNA (lncRNA), SLCO4A1-AS1, poor prognosis, EGFR/MAPK, colorectal cancer (CRC)