Cancers and Viruses: Understanding the Dual Role of Viral Pathogens in Medicine

An educational exhibition titled “Cancers: The Hidden Face of Viruses” opened on June 17, highlighting the complex relationship between viral infections and oncology. The exhibition, which runs through May 31, 2027, is hosted at the Docteur Mérieux Biological Sciences Museum in Marcy-l’Etoile and displayed on the fences of the International Agency for Research on Cancer (IARC) in Lyon. It explores both the role of viruses in inducing cancers and their emerging utility as tools in modern medical treatments.

Did You Know? Approximately one in every 12 cancers worldwide is linked to a viral infection, including those caused by hepatitis B, C, and D, human papillomavirus (HPV), and the Epstein-Barr virus.

How Viruses Are Used in Cancer Treatment

Researchers are increasingly repurposing viruses as therapeutic vectors after neutralizing their harmful properties in laboratory settings. According to the exhibition, scientists currently utilize viruses such as those derived from the vaccine and herpes families to target malignant cells. These “virus tools” are at the center of three primary therapeutic approaches currently under development or in practice.

The most advanced of these is CAR-T cell therapy, which has been used for blood cancers since 2018. This process involves using a viral vector to reprogram a patient’s own immune cells, enabling them to recognize and eliminate cancer cells. Medical researchers suggest this technology could eventually expand to treat solid tumors and various autoimmune diseases.

Another approach involves oncolytic viruses, which are engineered to infect and destroy cancer cells directly while simultaneously triggering an immune system alert. This method is currently deployed in France for non-operable metastatic melanoma and is being investigated for potential use against malignant gliomas.

The Biological Link Between Viruses and Cancer

Viruses contribute to cancer development by disrupting the normal function of human cells. When these pathogens enter a cell, they can induce rapid, uncontrolled cell division, interfere with DNA repair mechanisms, and prevent the body from eliminating damaged cells. Over several years, these disruptions can lead to the formation of cancerous growths.

The exhibition emphasizes the importance of public health interventions, such as vaccination for HPV and hepatitis B, as well as regular screenings. By understanding these mechanisms, the public can better engage in preventative care. The museum provides interactive elements, including QR codes that link to educational games, to help visitors grasp these complex biological concepts.

Expert Insight: The transition of viruses from disease-causing agents to therapeutic tools represents a significant shift in oncological strategy. While the link between certain viruses and cancer has long been a challenge for global health, the ability to “arm” these same biological entities to destroy tumors marks a sophisticated evolution in precision medicine.

Future Developments in Therapeutic Vaccines

A third, emerging area of study involves therapeutic vaccines, currently undergoing various clinical trials. Unlike traditional preventative vaccines, these treatments utilize modified “virus tools” to train the immune system to identify and attack existing cancer cells, with a specific focus on HPV-related cancers. While still in the developmental phase, these trials represent a potential next step in expanding the current arsenal of cancer immunotherapies.

Frequently Asked Questions

How do viruses cause cancer?
Viruses can enter human cells and disrupt their normal operations, causing them to multiply too quickly, preventing the repair of DNA errors, and stopping the body from removing damaged cells.

What are oncolytic viruses?
These are “virus tools” that have been modified to specifically target and destroy cancer cells while also alerting the immune system to the presence of the tumor.

Is this exhibition open to the public?
Yes, the exhibition is open at the Docteur Mérieux Biological Sciences Museum on Wednesdays, Thursdays, and Fridays from 10:00 a.m. to 12:30 p.m. and 2:00 p.m. to 5:00 p.m., as well as Sundays from 2:00 p.m. to 6:00 p.m.

How might the use of viral vectors in medicine change your perspective on the role of viruses in human health?