Cell Painting Identifies Flavonoids for Bladder Cancer

In a breakthrough led by Baylor College of Medicine, researchers have used Cell Painting technology to uncover plant-based flavonoids with the potential to treat bladder cancer. This innovative approach, which uses advanced microscopy and AI-driven analysis, allowed the team to screen hundreds of compounds and identify six with cancer-killing capabilities.

Cell Painting Enables Detailed Cellular Analysis

Cell Painting is a high-throughput imaging method that highlights cellular structures, helping scientists observe how individual cells respond to different compounds. With over 57,000 images per test plate, analyzing this data manually would be impossible. That’s where SPACe (Swift Phenotypic Analysis of Cells) comes in—a tool designed to handle this data using standard desktop computers.

Flavonoids Show Promise Against Bladder Cancer

Using SPACe, researchers screened 244 flavonoid compounds in bladder cancer cell lines. They identified six that killed cancer cells—two were already known (flavopiridol and rotenone), while four were novel candidates. These flavonoids work through different mechanisms, including damaging DNA or disrupting mitochondria—the energy hubs of the cell.

Notably, three flavonoids were found effective in 3D cancer models but didn’t harm normal bladder cells, highlighting their therapeutic promise.

Xanthohumol and the Beer Connection

Among the most interesting compounds was xanthohumol, a flavonoid present in certain beers. Researchers observed that it significantly reduced lipid metabolism in bladder cancer cells, leading to cell death. The team now wonders if regular consumption of xanthohumol-rich beer correlates with lower bladder cancer rates—a question for future epidemiological studies.

What’s Next in Flavonoid Cancer Research?

Future work will involve testing these promising flavonoids in animal models and eventually in clinical trials. The ultimate goal: to integrate safe, plant-derived compounds into modern cancer treatment strategies and improve outcomes for patients with bladder cancer.

Natural Compounds, High-Tech Tools, Big Impact

This study is a prime example of how Cell Painting and accessible computational tools can speed up the discovery of new therapies. By combining nature’s chemistry with state-of-the-art imaging and analysis, researchers are paving the way for safer, more targeted cancer treatments.

For more information: Bolt, M. J., et al. (2025). A phenotypic screen identifies xanthohumol and other flavonoids as killers of bladder cancer. Pharmacological Research – Natural Products. doi.org/10.1016/j.prenap.2025.100236.