41. In addition, IL-20 also causes cell expansion of multipotential hematopoietic progenitor cells. 42. It is also expressed in hematopoietic progenitor cells including erythroblasts, myeloblasts, and megakaryocytes. 43. Blimp-1 is also considered a'master regulator'of hematopoietic stem cells. 44. This gene encodes a member of the adhesion of hematopoietic cells to the extracellular matrix. 45. Currently, research is being conducted to identify transcription control on hematopoietic stem cell differentiation. 46. In fact, scientists do not even possess a good way to identify hematopoietic stem cells. 47. Splenomegaly occurs in the hematopoietic system. 48. It is a very efficient inducer of hematopoietic stem cell mobilization in animal and human studies. 49. Hematopoietic stem cells have been used to treat corneal ulcers of different origin of several horses.50. Figure 2 : A diagram of a hematopoietic stem cell ( HSC ) inside its niche.