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A Bioluminescent and Fluorescent Orthotopic Syngeneic Murine Model of Androgen-dependent and Castration-resistant Prostate Cancer
Published on: March 6, 2018
Glycosylation is a global target for androgen control in prostate cancer cells
1Institute of Genetic MedicineNewcastle University, Newcastle-upon-Tyne, UK jennifer.munkley@ncl.ac.uk.
Abstract:
Changes in glycan composition are common in cancer and can play important roles in all of the recognised hallmarks of cancer. We recently identified glycosylation as a global target for androgen control in prostate cancer cells and further defined a set of 8 glycosylation enzymes (GALNT7, ST6GalNAc1, GCNT1, UAP1, PGM3, CSGALNACT1, ST6GAL1 and EDEM3), which are also significantly upregulated in prostate cancer tissue. These 8 enzymes are under direct control of the androgen receptor (AR) and are linked to the synthesis of important cancer-associated glycans such as sialyl-Tn (sTn), sialyl LewisX (SLeX), O-GlcNAc and chondroitin sulfate. Glycosylation has a key role in many important biological processes in cancer including cell adhesion, migration, interactions with the cell matrix, immune surveillance, cell signalling and cellular metabolism. Our results suggest that alterations in patterns of glycosylation via androgen control might modify some or all of these processes in prostate cancer. The prostate is an abundant secretor of glycoproteins of all types, and alterations in glycans are, therefore, attractive as potential biomarkers and therapeutic targets. Emerging data on these often overlooked glycan modifications have the potential to improve risk stratification and therapeutic strategies in patients with prostate cancer.
Insights
Androgen receptor (AR) controls key glycosylation enzymes in prostate cancer, altering cancer-associated glycans. These changes impact cancer hallmarks, offering potential biomarkers and therapeutic targets for improved patient outcomes.
Area of Science:
- Oncology
- Glycobiology
- Molecular Biology
Background:
- Glycan composition changes are hallmarks of cancer, influencing critical biological processes.
- Prostate cancer exhibits altered glycosylation patterns, presenting opportunities for targeted therapies.
Purpose of the Study:
- To investigate the role of androgen receptor (AR) in regulating glycosylation in prostate cancer.
- To identify specific glycosylation enzymes and their associated glycans implicated in prostate cancer progression.
Main Methods:
- Analysis of glycosylation enzyme expression in prostate cancer tissue.
- Identification of AR-controlled glycosylation pathways and associated glycans.
Main Results:
- Eight specific glycosylation enzymes (GALNT7, ST6GalNAc1, GCNT1, UAP1, PGM3, CSGALNACT1, ST6Gal1, EDEM3) are upregulated and AR-controlled in prostate cancer.
- These enzymes are linked to the synthesis of cancer-associated glycans like sialyl-Tn (sTn), sialyl LewisX (SLeX), O-GlcNAc, and chondroitin sulfate.
- Androgen-mediated glycosylation alterations potentially modify cell adhesion, migration, immune surveillance, and metabolism in prostate cancer.
Conclusions:
- Androgen control of glycosylation represents a significant mechanism in prostate cancer.
- Targeting these AR-regulated glycosylation pathways may offer novel therapeutic strategies and biomarkers for prostate cancer risk stratification and treatment.
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