3D lab model links stiffness and tight spaces to cancer-cell movement

Inside a 3D microgel designed to mimic a tumor, breast and pancreatic cancer cells were tracked as they moved through spaces with different stiffness. The model was built by Associate Professor Yu Suk Choi, Dr Danielle Vahala and colleagues at the University of Western Australia’s School of Human Sciences.

The physical setting matters. As a tumor grows, the tissue around it can become stiffer and develop tiny spaces and pathways between fibers. Researchers have found it difficult to study those factors separately in the laboratory, because changing stiffness can also change the size of the spaces between cells.

The new tissue model gave the team a closer imitation of that structure. Aggressive cancer cells moved more readily under the physical conditions tested. The sharper surprise came from less aggressive cells: after detaching from neighboring cells and entering small spaces in the surrounding tissue, they too became mobile, with movement increasing in stiffer environments.

The findings reinforce the researchers’ view that cancer-cell movement is shaped not only by genetic changes or chemical signals, but also by the tissue around a tumor. Published in Advanced Science, the work offers clues about how metastasis begins, while stopping short of showing that a treatment can prevent it.

Practically, the model could give cancer researchers a more realistic laboratory platform for studying spread and for looking for treatments aimed at stopping it. Choi also says the same approach could be useful in tissue repair, wound healing and other diseases involving cell movement. For now, it remains a lab tool, with no clinical outcome reported.