OBJECTIVES: Unequivocal biomarkers are needed to predict susceptibility and progression of colorectal cancer. DESIGN AND METHODS: Paired samples of tumor and normal tissue from six patients with colorectal cancer of different localization, pTNM stage and grade were employed in the present study. MS analysis was used to identify differentially regulated proteins after 2-DE separation and densitometric analysis. RESULTS: Densitometric analysis revealed differential abundance of 55 spots in tumor as compared to normal tissues. Thirty nine out of 55 spots were unambiguously identified by MS representing 32 different proteins. CLIC1, TPD52 and FABPL were consistently overexpressed (>3-fold, P<0.05) in all tumor tissue samples, while TPM1, TPM2, TPM3, TAGL and MLRN were consistently down-regulated (>3-fold, P<0.05) compared to normal tissue. CONCLUSIONS: CLIC1 and TPD52 were significantly (P<0.05) up-regulated in all cases of colorectal cancer investigated, irrespective of localization, pTNM stage and grade of colon cancer highlighting their potential to serve as new biomarkers.
OBJECTIVES: Unequivocal biomarkers are needed to predict susceptibility and progression of colorectal cancer. DESIGN AND METHODS: Paired samples of tumor and normal tissue from six patients with colorectal cancer of different localization, pTNM stage and grade were employed in the present study. MS analysis was used to identify differentially regulated proteins after 2-DE separation and densitometric analysis. RESULTS: Densitometric analysis revealed differential abundance of 55 spots in tumor as compared to normal tissues. Thirty nine out of 55 spots were unambiguously identified by MS representing 32 different proteins. CLIC1, TPD52 and FABPL were consistently overexpressed (>3-fold, P<0.05) in all tumor tissue samples, while TPM1, TPM2, TPM3, TAGL and MLRN were consistently down-regulated (>3-fold, P<0.05) compared to normal tissue. CONCLUSIONS:CLIC1 and TPD52 were significantly (P<0.05) up-regulated in all cases of colorectal cancer investigated, irrespective of localization, pTNM stage and grade of colon cancer highlighting their potential to serve as new biomarkers.
Authors: Ayumu Taguchi; Jung-Hyun Rho; Qingxiang Yan; Yuzheng Zhang; Yang Zhao; Hanwen Xu; Satyendra Chandra Tripathi; Hong Wang; Dean E Brenner; Melanie Kucherlapati; Raju Kucherlapati; Adam T Boutin; Y Alan Wang; Ronald A DePinho; Ziding Feng; Paul D Lampe; Samir M Hanash Journal: Cancer Prev Res (Phila) Date: 2015-09-04