Article pubs.acs.org/jpr
Identification and Functional Validation of Caldesmon as a Potential Gastric Cancer Metastasis-associated Protein Qian Hou,† Hwee Tong Tan,† Kiat Hon Lim,‡ Teck Kwang Lim,§ Avery Khoo,‡ Iain B.H. Tan,∥ Khay Guan Yeoh,⊥ and Maxey C. M. Chung†,§,* †
Department of Biochemistry, National University of Singapore, 8 Medical Drive, Singapore 117597 Department of Pathology, Singapore General Hospital, Outram Road, Singapore 169608 § Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543 ∥ Department of Medical Oncology, National Cancer Centre Singapore, 11 Hospital Drive, Singapore 169610 ⊥ Department of Medicine, National University of Singapore, 1E Kent Ridge Road, NUHS Tower Block Level 10, Singapore 119228 ‡
S Supporting Information *
ABSTRACT: In this study, we aim to identify biomarkers for gastric cancer metastasis using a quantitative proteomics approach. The proteins extracted from a panel of 4 gastric cancer cell lines, two derived from primary cancer (AGS, FU97) and two from lymph node metastasis (AZ521, MKN7), were labeled with iTRAQ (8-plex) reagents and analyzed by 2D-LC−MALDI-TOF/TOF MS. In total, 641 proteins were identified with at least a 95% confidence. Using cutoff values of >1.5 and
