Chow BHY, Chua DTT, Sham JST, Zhang MY, Chow LWC, Bi J, Ma NF, Xie D, Loo WTY, Fung JMW, Fu L, Guan XY. Increased expression of annexin I is associated with drug-resistance in nasopharyngeal carcinoma and other solid tumors.
Proteomics Clin Appl 2012;
3:654-62. [PMID:
21136977 DOI:
10.1002/prca.200800164]
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Abstract
Adjuvant chemotherapy alongside radiotherapy is one of the effective therapies in nasopharyngeal carcinoma (NPC) treatment. However, the appearance of drug resistance is a major obstacle for anti-cancer chemotherapy and often causes failure of the chemotherapy. In this study, a drug-resistant gene annexin I (ANX-I) was identified by comparing differentially expressed proteins between a cisplatin (CDDP)-resistant NPC cell line CNE2-CDDP and parental CNE2 cells using 2-DE. When ANX-I was transfected into CNE2 cells, the CDDP resistance of CNE2 cells was dramatically increased. The drug-resistant ability of ANX-I was demonstrated by both in vitro and in vivo assays. The association of ANX-I expression with clinical features was also investigated. Increased expression of ANX-I was significantly associated with disease relapse in NPC (p<0.05). In breast and gastric cancer, increased expression of ANX-I was significantly associated with drug resistance (p<0.001) and poor prognosis (p<0.001), respectively. Taken together, our findings suggest that ANX-I plays an important role in drug resistance.
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