Researchers from Australia’s Asbestos and Dust Diseases Research Institute have developed 3D spheroid models of mesothelioma that accurately reflect how patients diagnosed with the rare, asbestos-related form of cancer respond to chemotherapy. The breakthrough provides more realistic testing platforms than traditional laboratory methods and could accelerate much-needed drug development.
3D Models Reveal Why Some Mesothelioma Tumors Resist Standard Chemotherapy
The study, published in the February 2026 issue of Scientific Reports, compared two-dimensional mesothelioma cells grown in traditional flat dishes to tiny, ball-shaped clusters called spheroids. The research revealed that the spherical three-dimensional models are better at displaying clinical drug resistance patterns, especially in the more aggressive sarcomatoid subtype, which has proven to be less responsive to cisplatin-pemetrexed chemotherapy than epithelioid cells.
The differences between the sarcomatoid and epithelioid mesothelioma cell responses could not be seen in flat dish cultures because cells grown flat in a dish behave differently from cells growing in three-dimensional clusters. The 3D versions more closely resemble actual mesothelioma tumors in patients’ bodies. When researchers tested chemotherapy on flat-cultured mesothelioma cells, the drugs appeared to work well—disrupting cell division and triggering cell death. But when testing the same drugs on 3D spheroid mesothelioma models, the cells showed only mild responses and continued surviving despite treatment.
3D Mesothelioma Cell Models Provide Invaluable Answers
Examining the 3D mesothelioma spheroids, the researchers saw that they maintained stable metabolic energy profiles after chemotherapy, suggesting that they entered a dormant but metabolically active state that helped them resist the treatment. By contrast, the flat-cultured cells showed significant energy reduction and cell death, making it look like the drugs were working better than they actually do in patients.
The researchers also implanted both flat-cultured mesothelioma cells and pre-formed 3D spheroids into mice to compare tumor growth and treatment response. In keeping with what they’d seen in the lab, the tumors that came from 3D spheroids grew larger, responded poorly to chemotherapy, and displayed organized structures similar to scar tissue that blocked the drugs from having an effect. Physicians treating mesothelioma patients have seen this scarring, which both blocks chemotherapy from reaching cancer cells and reduces oxygen levels, effectively decreasing the ability of immune cells.
Realistic 3D Testing Models Could Aid Mesothelioma Drug Development
The mesothelioma researchers note that 3D spheroid models both reflect clinical resistance patterns more accurately than flat cultures and offer scalable and cost-effective platforms for large-scale drug screening. The 3D spheroids reflect patient-like responses, making them valuable tools for validating new mesothelioma therapies before pursuing expensive clinical trials.
If you or someone you love has been diagnosed with mesothelioma, this type of research offers real hope for progress in treatment. For information on valuable resources available to you, contact the Patient Advocates at Mesothelioma.net today at 1-800-692-8608.
