Zonal regulation of collagen-type proteins and posttranslational modifications in prostatic benign and cancer tissues by imaging mass spectrometry.

The Prostate
Peggi M AngelRichard R Drake

Abstract

The emergence of reactive stroma is a hallmark of prostate cancer (PCa) progression and a potential source for prognostic and diagnostic markers of PCa. Collagen is a main component of reactive stroma and changes systematically and quantitatively to reflect the course of PCa, yet has remained undefined due to a lack of tools that can define collagen protein structure. Here we use a novel collagen-targeting proteomics approach to investigate zonal regulation of collagen-type proteins in PCa prostatectomies. Prostatectomies from nine patients were divided into zones containing 0%, 5%, 20%, 70% to 80% glandular tissue and 0%, 5%, 25%, 70% by mass of PCa tumor following the McNeal model. Tissue sections from zones were graded by a pathologist for Gleason score, percent tumor present, percent prostatic intraepithelial neoplasia and/or inflammation (INF). High-resolution accurate mass collagen targeting proteomics was done on a select subset of tissue sections from patient-matched tumor or nontumor zones. Imaging mass spectrometry was used to investigate collagen-type regulation corresponding to pathologist-defined regions. Complex collagen proteomes were detected from all zones. COL17A and COL27A increased in zones of INF compared w...Continue Reading

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Citations

May 9, 2021·Scientific Reports·Cassandra L CliftPeggi M Angel
Jun 16, 2021·Expert Review of Proteomics·Peggi M AngelRichard Drake
Oct 30, 2021·Journal of the American Society for Mass Spectrometry·Cassandra L CliftPeggi M Angel

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