Acta Anatomica Sinica ›› 2018, Vol. 49 ›› Issue (2): 191-197.doi: 10.16098/j.issn.0529-1356.2018.02.009

• Cancer Biology • Previous Articles     Next Articles

Clinical significance and correlation with prognosis of novel glycosylation isoform of cathepsin D expression in lung cancer

ZHANG Hui-juan1 ZHENG Xiao-wei 1,2 QIAO Ling1 LI Hong-chao3 CHANG Wen-jing1 LU Feng 1* JIA Cai-yun 1*   

  1. 1.He’nan University Joint National Laboratory for Antibody Drug Engineering,He’nan Kaifeng 475004, China; 2.Department of Clinical Laboratory,Puyang Hospital of Traditional Chinese Medicine, He’nan Puyang 475000, China; 3.Department of Pathology, Puyang Oilfeld General Hospital, He’nan Puyang 475000, China
  • Received:2017-05-26 Revised:2017-11-29 Online:2017-04-06 Published:2018-04-06
  • Contact: LU Feng; JIA Cai-yun E-mail:jcy2668@163.com

Abstract:

Objective To study the correlation of novel glycosylation isoform of cathepsin D (CTSD) expression with clinical features and its prognostic value in lung cancer.Methods Immunohistochemistry and Semi-quantitative RT-PCR were used to examine the cathepsin D expression, and Western blotting to analyze characterization of cathepsin D isoforms expression in 119 lung cancer tissues and 39 paraneoplastic tissues. Deglycosylation experiment was performed to check glycosylation-modified condition of cathepsin D. The association of 66kD isoform expression with clinical features and lung cancer prognosis was determined by Kaplan-Meier survival analysis. Results Cathepsin D highly expressed in squamous carcinomas, adenocarcinoma and small cell carcinoma tissues. 66kD protein form of cathepsin D was a novel glycosylation isoform of cathepsin D, its expression was associated with lung cancer histological type, clinical stage, lymph node metastasis and smoking status(P<0.05). The median survival time of lung cancer with 66kD isoform positive and negative expression were 20.0 months and 30.0 months, respectively (P<0.05). Histological type, clinical stage, lymph node metastasis, tumor size and 66kD isoform were independent prognostic factor of lung cancer. Conclusion Positive expression of 66kD isoform of cathepsin D may be one of molecular markers which correlate with poor prognosis of lung cancer.

Key words: Lung cancer, Cathepsin D, Glycosylation isoform, Western blotting, Human