Use and Toxicity of the Colony-Stimulating Factors

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Abstract
The colony-stimulating factors (CSFs) have emerged as effective drugs in a variety of clinical situations. These drugs stimulate the production and activity of haematopoietic cells in vitro and in vivo. Two members of this group, granulocyte CSF (G-CSF) and granulocyte-macrophage CSF (GM-CSF), have been approved in the US and Europe for use following cytotoxic chemotherapy and autologous bone marrow transplantation. Other uses of the CSFs include myelodysplastic syndromes, aplastic anaemia, the acquired immunodeficiency syndrome (AIDS) and cyclic and congenital neutropenias. Although CSFs have generally been well tolerated in clinical use there are a number of theoretical concerns, including disease acceleration, biased stem cell commitment and bone marrow exhaustion. New CSFs are currently under development. Combinations of growth factors in the future may maximise effectiveness while minimising toxicity.

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