USC Scientists Uncover 'Endless' Cancer-Fighting Immune Cells, Pioneering Off-the-Shelf Therapy

Scientists at USC Stem Cell have made a groundbreaking discovery, unlocking a new way to create a never-ending supply of cancer-fighting immune cells. This stem-cell-inspired technique focuses on growing large numbers of 'granulocyte-monocyte progenitors' (GMPs), which are early immune cells that can be trained to find and destroy cancer, while also making the body's natural defense stronger. In animal studies, these special cells successfully fought tumors, brought back normal immune functions, and show big promise for a ready-to-use treatment that can be given to many patients, not just one. This breakthrough, published recently in the journal Cell, is a big deal because current advanced treatments like CAR T-cell therapy are very personalized, often expensive, and hard to make for every patient. The USC team, led by Dr. Qi-Long Ying, found that GMPs can not only be grown in huge amounts in the lab but also 'self-renew,' meaning they can keep making more copies of themselves. This was surprising because self-renewal was thought to be mainly a special ability of stem cells, not these more developed progenitor cells. This means we could potentially have a limitless source of these engineered cells to fight a wide range of cancers, including tough ones like solid tumors. Looking ahead, this discovery could change how we treat cancer, moving us closer to 'off-the-shelf' therapies that are cheaper and more accessible worldwide. The next steps will involve more testing to see if these engineered GMPs work just as well in humans as they did in animals, paving the way for clinical trials. This research opens up new ways not just for cancer treatment, but also for understanding how our immune system works and how stem cells behave.