Types of cancer vaccines
Cancer vaccines train the body’s immune system to prevent or treat certain types of cancer. These vaccines are categorized based on their intended outcome and function, and each one has different methods and targets.
Some cancers are linked to viral infections and preventative vaccines help reduce the risk of infection. For example, human papillomavirus (HPV) can lead to cervical cancer or certain head and neck cancers. Similarly, Hepatitis B virus has been linked to liver cancer. Scientists have developed vaccines to protect against HPV and Hepatitis B infections, lowering the risk of these cancers.
Each tumor has a unique makeup that requires tailored treatments to target its specific characteristics. Therapeutic cancer vaccines work by targeting specific markers on cancer cells. For example, the sipuleucel-T vaccine targets specific markers in advanced prostate cancer, and the Bacillus Calmette-Guerin (BCG) vaccine was the first immunotherapy for early-stage bladder cancer.
Tumors often go through unique mutations and develop new proteins called neoantigens, which are not found in healthy cells. Personalized neoantigen cancer vaccines are designed to target these mutated tumor cells precisely, minimizing damage to healthy cells and reducing side effects. Various neoantigen vaccines are being tested in clinical trials as standalone treatments and for use in combination with other cancer therapies.