For the First Time, Lab-Grown Blood Is Pumped Into a Human's Veins
Red Blood Cell Wikimedia Commons Artificial blood may become a common reality, thanks to the first successful transfusion of lab-grown blood into a human. Luc Douay, of Pierre and Marie Curie University, Paris, extracted hematopoietic stem cells from a volunteer's bone marrow, and encouraged these cells to grow into red blood cells with a cocktail of growth factors. Douay's team labeled these cultured cells for tracing, and injected 10 billion of them (equalling 2 milliliters of blood) back into the marrow donor's body. After five days, 94 to 100 percent of the blood cells remained circulating in the body. After 26 days, 41 to 63 percent remained, which is a normal survival rate for naturally produced blood cells. The cells functioned just like normal blood cells, effectively carrying oxygen around the body. "He showed that these cells do not have two tails or three horns and survive normally in the body,"...