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A cancer/testis antigen, NY-SAR-35, induces EpCAM, CD44, and CD133, and activates ERK in HEK293 cells

Author:
Song, Myung-Ha, Kim, Ye-Rin, Bae, Jae-Ho, Shin, Dong-Hoon, Lee, Sang-Yull
Source:
Biochemical and biophysical research communications 2017 v.484 pp. 298-303
ISSN:
0006-291X
Subject:
CXCR4 receptor, X chromosome, antigens, carcinogenesis, cell growth, cyclins, genes, high-throughput nucleotide sequencing, messenger RNA, metastasis, mitogen-activated protein kinase, neoplasm cells, neoplasms, phosphorylation, pro-apoptotic proteins, testes
Abstract:
The cancer/testis (CT) antigen NY-SAR-35 gene is located on the X chromosome and is aberrantly expressed in various cancers but not in normal tissues, other than testes. Previously, we reported the expression of NY-SAR-35 enhanced cell growth, proliferation, and invasion in HEK293 and cancer cells. To extend understanding of the NY-SAR-35 gene, we used a next generation sequencing (NGS) approach. NY-SAR-35 expression induced growth, proliferation, metastasis, and stemness genes, as indicated by the up-regulations of CXCR4, EpCAM, CD133, and CD44, at the mRNA and protein levels. The expression of NY-SAR-35 in HEK293 cells significantly increased ERK phosphorylation, but not the phosphorylation of AKT. In HEK293/NY-SAR-35 cells, the expressions of pro-apoptotic proteins, including p53, Bax, and p21, were reduced and that of cyclin E was increased. Also, NY-SAR-35 increased the expressions of pluripotency genes (Nanog, Oct-4, and Sox2) and the ability of HEK293 cells to form colonies. Taken together, the present study indicates NY-SAR-35 functions as a CT antigen that triggers oncogenesis and self-renewal.
Agid:
5648209