The use of cobalt porphyrins for the manufacture of an agent for mobilizing bone marrow cells to peripheral blood, preferably used to treat congenital neutropenia, for the treatment and prevention of neutropenia caused by chemotherapy, radiotherapy and pharmacologically-induced neutropenia, for the treatment of acute myeloid leukemia, acute lymphocytic leukemia, myelodysplastic syndromes, and to increase the amount of circulating hematopoietic stem cells in peripheral blood for subsequent isolation in the process of apheresis and allogeneic or autologous transplantation.
