As we all know, lizard's legs or gecko's tail will grow new legs or tails after being broken. It is reported that in August 2005, when spivak was operating a toy model plane, the fingertip of his right middle finger was accidentally cut off by the sharp propeller of the model plane, and the cut fingertip could not be found. Spivak's younger brother Allen happens to be an American stem cell research scientist. When he learned the situation, he immediately gave spivak a bottle of powder to sprinkle on his finger wound. In four weeks, it will slowly regenerate, including skin, meat, blood vessels and nails. His broken fingertip grew back like a gecko's broken tail!

It turns out that spivak and his younger brother Allen were naughty when they were children, and their mother kept several salamanders in the cooking utensils. Like children all over the world, they are full of curiosity about the animal world around them. Because he didn't cherish animals when he was a child, when feeding salamanders with hamburger crumbs, he and his younger brother often cut off their pets' arms and legs and watched new limbs grow out, which amused them. After graduation, my brother Allen won a Fulbright Scholarship and was admitted to Harvard Medical School. Later, an academic paper on limb regeneration methods of reptiles such as salamanders was published. According to Dr. Stephen Badila, an expert from mcgowan Regenerative Medicine Association of the University of Pittsburgh, there are countless cases of finger and toe regeneration before the age of two, but no one can explain why and why this ability disappears at the age of two. Batila said that now he knows the mystery. Batila has published many papers about his research achievements. Batila explained that he removed Rocchi's intestine and sewed it up at the arterial position. The intestinal lining will regenerate every six days. Batila said, surprisingly, the intestinal tract that he transplanted into Rocky was mutated, and its shape and composition naturally changed, so it was difficult to distinguish it from the real artery. Batila tried the same operation on other dogs and successfully replaced tendons, bladders and ligaments. He realized that intestinal cells were used as scaffolds by animal bodies, so that new tissues and organs could grow on the scaffolds.

There are regenerative cells in every tissue of the human body. What scientists need to do is to find these cells and "command" them to regenerate as needed. "This regenerative cell will call other cells and tell them what they need to do, who needs to become blood vessels, who needs to become nerves, who needs to become muscle cells and so on. In theory, it can also help amputees grow their whole arms. The "special powder" given by Allen to spivak is the main reason for the regeneration of his severed finger. Recently, patients and dying people all over the world turned to spivak for help, hoping to get his help. In addition, thousands of people have contacted him, hoping that he can change the fate of their residual fingers. Attending doctor Steven Wolff said that this powder will not give clear instructions to "make fingers", but stem cells can "understand" the exact instructions from the surrounding environment. If it is next to the skin, it will grow skin. If it is next to the tendon, it will grow tendon. Stem cells play a key role in the growth and development of life. Just like steel bars and mud in buildings, they can differentiate into cells of any human tissue, but after the baby is born, stem cells stop this "building" work. The researchers say that this powder acts as a "scaffold" occupied by stem cells, and it can also send out chemical signals to promote stem cells to regenerate tissues.

Dr Anthony Aitala is located in the laboratory of Wake Forest University in the United States, which can be called a "human organ" growth factory. It is reported that Dr. Aitala has made an "artificial bladder" from patient cells in the laboratory. He first let the patient's cells grow in the laboratory, and then sprayed them on a biodegradable composite scaffold similar to a bladder. Eight weeks later, the scaffold was covered with regenerative cells and then implanted into the patient. When the stent naturally decomposes, the patient has a new bladder. An American patient underwent this groundbreaking clinical experimental operation at Thomas Jefferson Hospital in Philadelphia. At present, more than 65,438+0,000 pigs are slaughtered in Eichier's farm every day. The cells in the bladder of these pigs will be extracted before air drying, and then made into a powder-white substance, which will be sprinkled on spivak's fingers to make them grow. It is said that this powder can prevent the formation of scar tissue and gradually regenerate damaged organs.