An immuno-MALDI mass spectrometry assay for the oral cancer biomarker, matrix metalloproteinase-1, in dried saliva spot samples.

An immuno-MALDI mass spectrometry assay for the oral cancer biomarker, matrix metalloproteinase-1, in dried saliva spot samples. Anal Chim Acta. 2020 Mar 01;1100:118-130 Authors: Hsiao YC, Lin SY, Chien KY, Chen SF, Wu CC, Chang YT, Chi LM, Chu LJ, Chiang WF, Chien CY, Chang KP, Chang YS, Yu JS Abstract Oral cavity cancer is a common cancer type that presents an increasingly serious global problem. Oral squamous cell carcinoma (OSCC) accounts for >90% oral cancer cases. No biomarker tests are currently available for management of this cancer type in clinical practice. Previously, we validated matrix metalloproteinase-1 (MMP1) as one of the most promising salivary biomarkers for OSCC detection. Development of a convenient, rapid and high-throughput assay should further facilitate application of salivary MMP1 measurement for early detection of OSCC. The present study aimed to develop a workflow comprising dry saliva spot (DSS) sampling and immunoenrichment-coupled MALDI-TOF MS (immuno-MALDI) analysis to quantify salivary MMP1. We generated recombinant MMP1 protein and anti-peptide antibodies against MMP1, which were used to optimize the procedures of the entire workflow, including DSS sampling, on-paper protein digestion and elution, KingFisher magnetic particle processor-assisted immuno-enrichment and MALDI-TOF MS analysis. The established workflow was applied to measure salivary MMP1 levels in DSS samples from 5 healthy donors and...
Source: Analytica Chimica Acta - Category: Chemistry Authors: Tags: Anal Chim Acta Source Type: research