Fast-Relaxing Hydrogels Promote Pancreatic Adenocarcinoma Cell Aggressiveness Through Integrin β1 Signaling

Overview

Journal Biomacromolecules

Publisher American Chemical Society

Date 2025 Jan 22

PMID 39841789

Authors

Han Nguyen

Ngoc Ha Luong

Jacqueline K Peil

Yan Tong

Dana K Mitchell

Melissa L Fishel

Chien-Chi Lin

Affiliations

Soon will be listed here.

Abstract

Pancreatic ductal adenocarcinoma (PDAC) is characterized by a dense extracellular matrix (ECM) exhibiting high stiffness and fast stress relaxation. In this work, gelatin-based viscoelastic hydrogels were developed to mimic the compositions, stiffness, and fast stress relaxation of PDAC tissues. The hydrogels were cross-linked by gelatin-norbornene-boronic acid (GelNB-BA), thiolated macromers, and a 1,2-diol-containing linear synthetic polymer PHD. Controlling the thiol-norbornene cross-linking afforded tunable stiffness, whereas increasing PHD content led to hydrogels with PDAC-mimicking fast stress relaxation. studies, including proliferation, morphology, and mRNA-sequencing, showed that fast-relaxing hydrogels supported PDAC cell proliferation, epithelial-mesenchymal transition (EMT), and integrin β1 activation. Blocking integrin β1 led to upregulating EMT markers in both slow and fast-relaxing hydrogels. However, this strategy profoundly impacted tumor growth rate and reduced tumor size but did not alter metastasis patterns in an orthotopic mouse model. This suggests a need to further evaluate the antitumor effect of integrin β1 blockade.

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