Abstract

Van Gogh-like protein 1 (VANGL1) is an integral membrane protein that has a decisive effect on invasion, migration, and metastasis of tumor cells in various cancers including colorectal cancer. Elevation of VANGL1 level in cancer tissue is often observed with progressive and metastatic colorectal cancer. Therefore, detection of VANGL1 level in patient specimens can be used as a diagnostic marker for colorectal cancer screening. In this study, we developed magnetic beads that conjugate the VANGL1 antibody, which can be used for quantitative analysis of VANGL1. The procedure for bead preparation was optimized, and detection analysis was validated by using Caco2 and HT29 colorectal cancer cell lysates. Through the procedure, VANGL1 level from cell lysates of Caco2 and HT29 cells were quantified to estimate whether the antibody-conjugated magnetic bead can be used to trace amounts of VANGL1. Results from VANGL1 level obtained by using the antibody-conjugated magnetic beads suggest that the procedure has high precision and sensitivity in analyzing VANGL1. In conclusion, the results indicate that the method is appropriate for microquantitation of VANGL1 from patient specimens.

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