Our immune systems don’t just fight bacteria and viruses invading the body. They are responsible for keeping our own tissues in check, taking out cancerous cells before they have a chance to grow. Once a tumor forms, however, it can create an environment that declaws cancer-fighting immune cells—in some cases even reprogramming them to suppress other parts of the immune system.
\n\nOvercoming the oppressive tumor environment remains a barrier for even some of the most promising treatments. “One of the biggest challenges in cancer immunotherapy is that the immune system may be capable of attacking a tumor, but the tumor environment can stop those immune cells from doing their job,” University of Adelaide professor Chunxia Zhao explained in a press release.
\n\nIn a study published this week in Science Advances, Zhao’s team developed a system that can precisely deliver an mRNA therapy to transform immune cells back into allies. The researchers focused on tumor-associated macrophages, which—when rewired by signals from the cancer—hinder the arrival and activity of T cells, one of the body’s main weapons against cancer. The mRNA carries the instructions for producing CXCL9, a chemical signal for recruiting T cells.
\n\nFlipping this switch is the easy part. mRNA…
Original source: https://www.wired.com/