Scientists have created a new hydrogel model that mimics how pancreatic tumors become stiffer over time, offering a more realistic way to study Pancreatic Ductal Adenocarcinoma (PDAC). The advance could help researchers better understand why this aggressive cancer resists treatment and spreads so easily.
PDAC tumors are surrounded by a dense, stiff environment caused by excess extracellular matrix. This stiffness not only blocks drugs from working effectively but also influences how cancer cells grow, move, and evolve as the disease progresses.
To replicate this, researchers designed a dynamic granular hydrogel using a specialized material that can be assembled and later stiffened in a controlled way. The system allows cells to be placed inside a soft environment that can gradually harden, closely mimicking real tumor development.
In experiments, cancer-associated fibroblasts (CAFs) behaved differently depending on stiffness. In softer conditions, they appeared more spread out and exploratory, while in stiffer environments they became rounder and formed stronger attachments. Importantly, CAFs continued to promote the movement of pancreatic cancer cells even as stiffness increased, helping those cells migrate away from their original clusters.
The model also maintained consistent internal space for cell movement, allowing scientists to isolate the effects of stiffness from other factors. Researchers say this platform provides a more accurate, time-dependent 3D model of pancreatic cancer, which could improve studies of tumor progression and drug response.