Granulocyte-macrophage colony-stimulating factor ( GM-CSF), also known as colony stimulating factor 2 (CSF2), is a monomeric glycoprotein secreted by macrophages, T cells, mast cells, NK cells, endothelial cells and fibroblasts that functions as a cytokine. The pharmaceutical analogs of naturally occurring GM-CSF are called sargramostim and molgramostim.
Function [ edit ]
GM-CSF is a
monomeric glycoprotein that functions as a cytokine - it is a white blood cell growth factor. GM-CSF stimulates  stem cells to produce granulocytes ( neutrophils, eosinophils, and basophils) and monocytes. Monocytes exit the circulation and migrate into tissue, whereupon they mature into macrophages and dendritic cells. Thus, it is part of the immune/ inflammatory cascade, by which activation of a small number of macrophages can rapidly lead to an increase in their numbers, a process crucial for fighting infection.
GM-CSF also has some effects on mature cells of the immune system. These include, for example, inhibiting neutrophil migration and causing an alteration of the receptors expressed on the cells surface.
GM-CSF signals via signal transducer and activator of transcription,
STAT5. In macrophages, it has also been shown to signal via  STAT3. The cytokine activates macrophages to inhibit fungal survival. It induces deprivation in intracellular free zinc and increases production of reactive oxygen species that culminate in fungal zinc starvation and toxicity. Thus, GM-CSF facilitates development of the immune system and promotes defense against infections. 
GM-CSF also plays a role in embryonic development by functioning as an
embryokine produced by reproductive tract. 
Genetics [ edit ]
The human gene has been localized to a cluster of related genes at chromosome region 5q31, which is known to be associated with interstitial deletions in the
5q- syndrome and acute myelogenous leukemia. Genes in the cluster include those encoding interleukins 4, 5, and 13. 
Glycosylation [ edit ]
Human granulocyte macrophage colony-stimulating factor is glycosylated in its mature form.
Medical use [ edit ]
GM-CSF is manufactured using
recombinant DNA technology and is marketed as a protein therapeutic called molgramostim or, when the protein is expressed in yeast cells, sargramostim. It is used as a medication to stimulate the production of white blood cells and thus prevent neutropenia following chemotherapy. 
GM-CSF has also been evaluated in clinical trials for its potential as a vaccine
adjuvant in HIV-infected patients.  
Sargramostim [ edit ]
This article appears to contradict the article . Sargramostim (November 2015)
Sargramostim, recombinant yeast-derived GM-CSF developed at Immunex (now Amgen) and first given to six humans in 1987 as part of a compassionate-use protocol for the victims of cesium irradiation from the Goiânia accident. It was originally developed by  Immunex. When Amgen bought Immunex, sargramostim was divested to Berlex, a US subsidiary of Schering AG. Berlex was acquired by Bayer in 2006, and Bayer sold the franchise to Genzyme in 2009, which was subsequently acquired by Sanofi. Its use was approved by U.S.  Food and Drug Administration for acceleration of white blood cell recovery following autologous bone marrow transplantation in patients with non-Hodgkin's lymphoma, acute lymphocytic leukemia, or Hodgkin's disease in March 1991. In November 1996, the FDA also approved sargramostim for treatment of  fungal infections and replenishment of white blood cells following chemotherapy. 
Rheumatoid arthritis [ edit ]
GM-CSF is found in high levels in joints with
rheumatoid arthritis and blocking GM-CSF may reduce the inflammation or damage. Some drugs (e.g. MOR103) are being developed to block GM-CSF. 
See also [ edit ]
References [ edit ]
^ Francisco-Cruz A, Aguilar-Santelises M, Ramos-Espinosa O, Mata-Espinosa D, Marquina-Castillo B, Barrios-Payan J, Hernandez-Pando R (Jan 2014). "Granulocyte-macrophage colony-stimulating factor: not just another haematopoietic growth factor". Medical Oncology 31 (1): 774. doi: 10.1007/s12032-013-0774-6. PMID 24264600.
^ Gasson JC (Mar 1991). "Molecular physiology of granulocyte-macrophage colony-stimulating factor". Blood 77 (6): 1131–45. PMID 2001448.
^ Voehringer D (Oct 2012). "Basophil modulation by cytokine instruction". European Journal of Immunology 42 (10): 2544–50. doi: 10.1002/eji.201142318. PMID 23042651.
^ Subramanian Vignesh K, Landero Figueroa JA, Porollo A, Caruso JA, Deepe GS (Oct 2013). "Granulocyte macrophage-colony stimulating factor induced Zn sequestration enhances macrophage superoxide and limits intracellular pathogen survival". Immunity 39 (4): 697–710. doi: 10.1016/j.immuni.2013.09.006. PMC 3841917. PMID 24138881.
^ Hansen PJ, Dobbs KB, Denicol AC (Sep 2014). "Programming of the preimplantation embryo by the embryokine colony stimulating factor 2". Animal Reproduction Science 149 (1-2): 59–66. doi: 10.1016/j.anireprosci.2014.05.017. PMID 24954585.
^ "Entrez Gene: CSF2 colony stimulating factor 2 (granulocyte-macrophage)".
^ Vacchelli E, Eggermont A, Fridman WH, Galon J, Zitvogel L, Kroemer G, Galluzzi L (Jul 2013). "Trial Watch: Immunostimulatory cytokines". Oncoimmunology 2 (7): e24850. doi: 10.4161/onci.24850. PMC 3782010. PMID 24073369.
^ Hellerstein M, Xu Y, Marino T, Lu S, Yi H, Wright ER, Robinson HL (Nov 2012). "Co-expression of HIV-1 virus-like particles and granulocyte-macrophage colony stimulating factor by GEO-D03 DNA vaccine". Human Vaccines & Immunotherapeutics 8 (11): 1654–8. doi: 10.4161/hv.21978. PMID 23111169.
^ Iyer SS, Amara RR. "DNA/MVA Vaccines for HIV/AIDS". Vaccines 2 (1): 160–78. doi: 10.3390/vaccines2010160. PMID 26344473.
^ Schmeck HM (1987-11-02). "Radiation Team Sent to Brazil Saves Two With a New Drug". New York Times . Retrieved . 2012-06-20
^ Stewart Lyman for Xcocomy. June 11, 2010 Biotech Drug Discovery in Seattle: A Look Back
^ "Approval Summary for sargramostim". Oncology Tools. U.S. Food and Drug Administration, Center for Drug Evaluation and Research. 1991-03-05. Archived from the original on 2007-09-29 . Retrieved . 20 September 2009
^ "Newly Approved Drug Therapies (179): Leukine (sargramostim), Immunex". CenterWatch . Retrieved . 2008-10-12
^ Deiß A, Brecht I, Haarmann A, Buttmann M (Mar 2013). "Treating multiple sclerosis with monoclonal antibodies: a 2013 update". Expert Review of Neurotherapeutics 13 (3): 313–35. doi: 10.1586/ern.13.17. PMID 23448220.
External links [ edit ]