원문정보
초록
영어
Ovarian cancer is the most lethal gynecological malignancy, and specific biomarkers are important needed to improve diagnosis, prognosis, and to forecast and monitor treatment efficiency. There are a lot of pathological factors, including reactive oxygen species (ROS), involved in the process of cancer initiation and progression. The oxidative modification of proteins by ROS is implicated in the etiology or progression of disorders and diseases. In this study, a labeling experiment with the thiol-modifying reagent biotinylated iodoacetamide (BIAM) revealed that a variety of proteins were differentially oxidized between normal and tumor tissues of ovarian cancer patients. To identify cysteine oxidation-sensitive proteins in ovarian cancer patients, we performed comparative analysis by nano-UPLC-MSE shotgun proteomics. We found oxidation-sensitive 22 proteins from 41 peptides containing cysteine oxidation. Using Ingenuity program, these proteins identified were established with canonical network related to cytoskeletal network, cellular organization and maintenance, and metabolism. Among oxidation-sensitive proteins, the modification pattern of Collagen alpha-1(VI) chain (COL6A1) was firstly confirmed between normal and tumor tissues of patients by 2-DE western blotting. This result suggested that COL6A1 might have cysteine oxidative modification in tumor tissue of ovarian cancer patients.
목차
INTRODUCTION
MATERIALS AND METHODS
Tissue Specimens
Two-Dimensional Gel Electrophoresis (2-DE) and WesternBlotting
Nano-UPLC MSE Shotgun Proteomics
In-gel Tryptic Digestion
Nano-UPLC-MSE Tandem Mass Spectrometry
Protein and Peptide Identification
Bioinformatics Analysis
RESULTS
Differential Oxidative Modification of Ovarian Cancer Patients
Reciprocal Networks of Proteins Containing Cysteine Oxidation
Different Modification Pattern of COL6A1
DISCUSSION
REFERENCES