Episode 223: Oncogenic Viruses

In Episode 223 of Rio Bravo Q Week, medical students Meher Poporai and Jeremy Pan dive into the world of oncogenic viruses—viruses that can cause cancer. They begin with a framework explaining three main mechanisms: direct oncogenesis (disrupting tumor suppressors like p53 and RB), chronic inflammation leading to DNA damage, and immune evasion that impairs the body’s ability to detect abnormal cells. The episode then explores key oncogenic viruses, including HPV (linked to cervical, anal, and oropharyngeal cancers), EBV (associated with Burkitt lymphoma, nasopharyngeal carcinoma, and Hodgkin lymphoma), hepatitis B and C (major causes of hepatocellular carcinoma), HTLV-1 (causing adult T-cell leukemia/lymphoma), HHV-8 (responsible for Kaposi’s sarcoma in immunocompromised patients), Merkel cell polyomavirus (linked to aggressive skin cancer), and HIV (which indirectly increases cancer risk by weakening immune surveillance). The hosts emphasize the importance of prevention through vaccination (HPV, Hep B), early screening, and antiretroviral therapy, highlighting how public health interventions like the HPV vaccine have led to near-zero infection rates in vaccinated populations. They conclude with actionable takeaways for clinical practice, including maintaining high suspicion for HPV-related cancers in young non-smokers and aggressive cancers in immunocompromised individuals. The episode underscores a powerful message: many cancers are preventable through vaccines and early detection. The hosts stress that oncogenic viruses represent a critical intersection of infectious disease and oncology, where prevention is not just possible but already transforming outcomes. They highlight the success of the HPV vaccine in Scotland, the curative potential of DAA therapy for Hep C, and the life-saving impact of ART in reducing HIV-associated cancers. The tone is optimistic and empowering, emphasizing that medicine has made remarkable strides in turning cancer prevention into a reality through targeted public health strategies.