A pharmaceutical composition to induce bone marrow stem cell mobilization from the bone marrow to peripheral blood in patients suffering from pathological conditions, such as diabetes, or subjected to treatments that impair cell mobilization, or in patients suffering from the so called “poor mobilizer” condition, includes at least one therapeutic agent that inhibits production and/or action of the human cytokine oncostatin M (OSM), a macrophage derived factor that prevents mobilization of stem cells.