Spotlight. Stem-cell-boosting drug licensed. In May , Children’s Hospital Boston signed an exclusive license agreement with Fate Therapeutics, Inc. for rights to methods and compounds in the laboratory of Leonard Zon, MD, for stimulating hematopoietic (blood-forming) stem cells and enhancing tissue regeneration. Stem cell injections are already being studied in people who are slow to recover after an ischemic stroke (clot-caused stroke). In this study, researchers implanted human neural stem cells in 10 rats and tested whether electrically stimulating the cells might lead to increased stem cell production and faster stroke recovery. Brain stem glioma (usually high grade): A brain stem glioma forms in the brain stem, which is the part of the brain connected to the spinal cord. It is often a high-grade tumor, which spreads widely through the brain stem and is .