Virus Engineered to Attack Cancer Cells

Researchers in Argentina say they have genetically modified a virus that causes colds, conjunctivitis, and bronchitis to attack cancer cells without harming healthy tissue. According to Reuters, the idea of using viruses to stimulate the immune system to find and kill cancer cells has long intrigued scientists. This interest has intensified in recent years due to advances in genetic engineering, allowing scientists to equip viruses against cancer tumors. Dr. Osvaldo Padjiser, head of the Cellular and Molecular Therapy Laboratory at the 'Le Lavar' Institute in Buenos Aires, has cultivated a virus that attacks both malignant cells and the stem tissue associated with tumors. He explains, 'This is a virus that we have genetically modified to limit its ability to infect malignant cells, unlike what a virus can originally do, which is infect normal cells and cause colds, conjunctivitis, and bronchitis. In addition to the changes we have made to limit infection to malignant cells, this virus also has a gene that enhances the immune response.' The journal Nature reported in October that anti-cancer viruses are being approved. Researchers hope that continued clinical trials of similar anti-cancer viruses and their final approval will create more motivation and attract the necessary investment for the development of this method. According to Padjiser, these viruses have been very effective in pre-clinical cancer models tested, especially ovarian and skin cancers. However, there are also other viruses to combat pancreatic and colorectal cancers. Meanwhile, Professor Lawrence Young, a cancer specialist at the University of Warwick in the UK, says a mechanism has been developed to penetrate the cells surrounding the cancer tumor. One interesting aspect of cancer is the increasing understanding that when you have a cancer tumor, there are actually many cells around the tumor that behave incorrectly due to the new environment. He believes there are still barriers to this treatment method. In addition to reducing treatment costs to make it more accessible, a person's immune system may eventually react to a certain amount of the drug and render it less effective. Doctors in the early 19th century noted in their reports that their cancer patients sometimes did not show cancer symptoms for a while after viral illnesses. Therefore, scientists in the 1950s and 1960s began injecting a collection of viruses into cancer patients inspired by this observation. Treatment in some cases led to tumor eradication, but in others, it resulted in the patient's death.