Japanese Scientists Develop Experimental Method to Make Cancer Cells Destroy Themselves

Scientists in Japan have developed an experimental technique that could open a new path towards more targeted cancer treatment by using a chemical produced by cancer cells to create cancer-fighting compounds directly inside them.

The research, led by Katsunori Tanaka and his team at Japan’s RIKEN Pioneering Research Institute, focuses on carbon monoxide, a chemical that certain cancer cells produce at elevated levels. The scientists developed a method to use this substance as a starting material for generating an anticancer compound inside the cells.

The findings were published in the journal Nature Communications on September 17, 2026, offering a potential new approach to targeting cancer while limiting damage to healthy tissue.

Cancer treatment often involves delivering drugs into the body and relying on them to reach and attack tumour cells. However, conventional treatments can also affect healthy cells, sometimes causing significant side effects.

The Japanese research team explored a different approach: producing an anticancer compound inside cancer cells rather than administering the finished compound directly.

The method uses carbon monoxide, which can accumulate at higher levels in some cancer cells, as a chemical ingredient for producing a compound called phenanthridinone.

To make the process work, researchers developed a protective system involving albumin, a protein found in blood, and a palladium-based catalyst. The albumin helps protect the catalyst so it can carry out the chemical reaction inside cells.

The system was tested in laboratory-grown human cancer cells, including liver, cervical, breast and lung cancer cell lines. Researchers detected the intended chemical product in the cancer cells, while it was not detected in the noncancerous cell line tested.

The team also modified the system to produce a more toxic anticancer compound inside liver cancer cells.

One of the biggest challenges in cancer treatment is attacking malignant cells without causing excessive harm to surrounding healthy tissue.

By taking advantage of chemical differences between cancerous and noncancerous cells, researchers hope to develop treatments that act more selectively.

The Japanese technique could potentially help address this challenge by using a substance already present in certain cancer cells to trigger the production of a therapeutic compound where it is needed. If further research confirms that the approach is safe and effective, it could contribute to the development of future targeted cancer treatments.

Despite the promising findings, the technique is still at an early experimental stage. The research has demonstrated the chemical process in laboratory-grown cells, but it has not yet established that the method can safely eliminate tumours in animals or treat cancer in humans.

Researchers must conduct further studies to determine whether the system can reach tumours effectively, produce enough of the anticancer compound and avoid harming healthy organs and tissues.

Cancer also includes many different diseases, each with its own biological characteristics. A method that works against certain cancer cells may not work equally well against every type of cancer.

For now, the discovery should be viewed as a potential direction for future treatment research rather than an available cancer therapy.

The research team plans to investigate the method in animal models to assess its effectiveness, safety and ability to target tumours inside a living organism. These studies will help determine whether the laboratory results can be translated into a practical treatment. Additional research and clinical trials would be needed before the approach could be considered for use in patients.

The findings nevertheless highlight an emerging area of medical research: designing treatments that use the unique chemistry of diseased cells to produce therapeutic compounds at the target site.