Aberrant O-GlcNAc-modified proteins expressed in primary colorectal cancer

  • Authors:
    • Thanong Phueaouan
    • Parunya Chaiyawat
    • Pukkavadee Netsirisawan
    • Daranee Chokchaichamnankit
    • Phaibul Punyarit
    • Chantragan Srisomsap
    • Jisnuson Svasti
    • Voraratt Champattanachai
  • View Affiliations

  • Published online on: October 11, 2013     https://doi.org/10.3892/or.2013.2794
  • Pages: 2929-2936
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Abstract

O-GlcNAcylation is a post-translational modification of serine and threonine residues which is dynamically regulated by 2 enzymes; O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA) that catalyze the addition and removal of a single N-acetylglucosamine (GlcNAc) molecule, respectively. This modification is thought to be a nutrient sensor in highly proliferating cells via the hexosamine biosynthesis pathway, a minor branch of glycolysis. Although emerging evidence suggests that O-GlcNAc modification is associated with many types of cancer, identification of O-GlcNAc‑modified proteins and their role in cancer remain unexplored. In the present study, we demonstrated that O-GlcNAcylation is increased in primary colorectal cancer tissues, and that this augmentation is associated with an increased expression of OGT levels. Using 2-dimensional O-GlcNAc immunoblotting and LC-MS/MS analysis, 16 proteins were successfully identified and 8 proteins showed an increase in O-GlcNAcylation, including cytokeratin 18, heterogeneous nuclear ribonucleoproteins A2/B1 (hnRNP A2/B1), hnRNP H, annexin A2, annexin A7, laminin-binding protein, α-tubulin and protein DJ-1. Among these identified proteins, annexin A2 was further confirmed to show overexpression of O-GlcNAc in all cancer samples. The results, therefore, indicate that aberrant O-GlcNAcylation of proteins is associated with colorectal cancer and that identification of O-GlcNAc-modified proteins may provide novel biomarkers of cancer.
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December 2013
Volume 30 Issue 6

Print ISSN: 1021-335X
Online ISSN:1791-2431

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Spandidos Publications style
Phueaouan T, Chaiyawat P, Netsirisawan P, Chokchaichamnankit D, Punyarit P, Srisomsap C, Svasti J and Champattanachai V: Aberrant O-GlcNAc-modified proteins expressed in primary colorectal cancer. Oncol Rep 30: 2929-2936, 2013
APA
Phueaouan, T., Chaiyawat, P., Netsirisawan, P., Chokchaichamnankit, D., Punyarit, P., Srisomsap, C. ... Champattanachai, V. (2013). Aberrant O-GlcNAc-modified proteins expressed in primary colorectal cancer. Oncology Reports, 30, 2929-2936. https://doi.org/10.3892/or.2013.2794
MLA
Phueaouan, T., Chaiyawat, P., Netsirisawan, P., Chokchaichamnankit, D., Punyarit, P., Srisomsap, C., Svasti, J., Champattanachai, V."Aberrant O-GlcNAc-modified proteins expressed in primary colorectal cancer". Oncology Reports 30.6 (2013): 2929-2936.
Chicago
Phueaouan, T., Chaiyawat, P., Netsirisawan, P., Chokchaichamnankit, D., Punyarit, P., Srisomsap, C., Svasti, J., Champattanachai, V."Aberrant O-GlcNAc-modified proteins expressed in primary colorectal cancer". Oncology Reports 30, no. 6 (2013): 2929-2936. https://doi.org/10.3892/or.2013.2794