Detection of Chemotherapy-resistant Pancreatic Cancer Using a Glycan Biomarker, sTRA.

Gao, ChongFeng, Wisniewski, Luke, Liu, Ying, Staal, Ben, Beddows, Ian, Plenker, Dennis, Aldakkak, Mohammed, Hall, Johnathan, Barnett, Daniel, Gouda, Mirna Kheir, Allen, Peter, Drake, Richard, Zureikat, Amer, Huang, Ying, Evans, Douglas, Singhi, Aatur, Brand, Randall E, Tuveson, David A, Tsai, Susan, Haab, Brian B (January 2021) Detection of Chemotherapy-resistant Pancreatic Cancer Using a Glycan Biomarker, sTRA. Clinical Cancer Research, 27 (1). pp. 226-236. ISSN 1078-0432

URL: https://www.ncbi.nlm.nih.gov/pubmed/33093149
DOI: 10.1158/1078-0432.CCR-20-2475

Abstract

PURPOSE: A subset of pancreatic ductal adenocarcinomas (PDACs) is highly resistant to systemic chemotherapy, but no markers are available in clinical settings to identify this subset. We hypothesized that a glycan biomarker for PDACs called sialylated tumor-related antigen (sTRA) could be used for this purpose. EXPERIMENTAL DESIGN: We tested for differences between PDACs classified by glycan expression in multiple systems: sets of cell lines, organoids, and isogenic cell lines; primary tumors; and blood plasma from human subjects. RESULTS: The sTRA-expressing models tended to have stem-like gene expression and the capacity for mesenchymal differentiation, in contrast to the nonexpressing models. The sTRA cell lines also had significantly increased resistance to seven different chemotherapeutics commonly used against pancreatic cancer. Patients with primary tumors that were positive for a gene expression classifier for sTRA received no statistically significant benefit from adjuvant chemotherapy, in contrast to those negative for the signature. In another cohort, based on direct measurements of sTRA in tissue microarrays, the patients who were high in sTRA again had no statistically significant benefit from adjuvant chemotherapy. Furthermore, a blood plasma test for the sTRA glycan identified the PDACs that showed rapid relapse following neoadjuvant chemotherapy. CONCLUSIONS: This research demonstrates that a glycan biomarker could have value to detect chemotherapy-resistant PDAC in clinical settings. This capability could aid in the development of stratified treatment plans and facilitate biomarker-guided trials targeting resistant PDAC.

Item Type: Paper
Subjects: Investigative techniques and equipment > biomarker
Investigative techniques and equipment > cell culture > cancer organoids
diseases & disorders > cancer > drugs and therapies > chemoresistance
diseases & disorders > cancer > cancer types > pancreatic cancer
CSHL Authors:
Communities: CSHL labs > Tuveson lab
SWORD Depositor: CSHL Elements
Depositing User: CSHL Elements
Date: 1 January 2021
Date Deposited: 06 May 2021 18:56
Last Modified: 06 May 2021 18:56
PMCID: PMC7785673
URI: https://repository.cshl.edu/id/eprint/40026

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