Blood stem cells reverse type I diabetes

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Medical Network November 17th, 16th, published in the "Scientific Translational Medicine" magazine, the important research results show that the Boston Children's Institute researchers, through the injection of pre-treated blood stem cells, produced more protein PD-L1, It inhibited the body's own immune response and successfully reversed the symptoms of type I diabetes in the mouse model.
Paul Fiorina said: "When these cells are injected, it really changes the immune system." The researchers treated the insulin-producing treatment from the pancreas with blood stem cells and almost cured it in a short period of time. In diabetes, one-third of the mice maintain their blood glucose levels during their lifetime.
Previous studies have attempted to treat type 1 diabetes with immunotherapy such as autologous bone marrow transplantation, and hope to curb the autoimmune system to attack human islet cells, but such efforts have failed, and the immune regulation of diabetic mice and human blood stem cells is impaired. The situation has not improved.
The study confirmed that PD-L1 protein not only works by gene therapy, but also produces and functions by small molecule pretreatment. The research team led by Fiorina used the harmless virus as a carrier to introduce the healthy PD-L1 gene into stem cells, which reversed the symptoms of diabetes in mice. In addition, the team also confirmed that the same effect can be achieved by treating cells with three small molecules of "interferon".
This is a new approach to the treatment of diabetes, which has the advantage that there is no rejection, because the patient uses his own cells. Now, the team is working to optimize the small molecule “cocktail” for regulating blood stem cells, and has been clinically tested in patients with type 1 diabetes at the US Food and Drug Administration (FDA) new drug pre-research conference. support. (Reporter Fang Linlin)

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