Granulocyte colony-stimulating factor

Last updated
CSF3
GCSF Crystal Structure.rsh.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases CSF3 , C17orf33, CSF3OS, GCSF, colony stimulating factor 3
External IDs OMIM: 138970 MGI: 1339751 HomoloGene: 7677 GeneCards: CSF3
Orthologs
SpeciesHumanMouse
Entrez

1440

12985

Ensembl

ENSG00000108342

ENSMUSG00000038067

UniProt

P09919

P09920

RefSeq (mRNA)

NM_000759
NM_001178147
NM_172219
NM_172220

NM_009971

RefSeq (protein)

NP_000750
NP_001171618
NP_757373
NP_757374

NP_034101

Location (UCSC) Chr 17: 40.02 – 40.02 Mb Chr 11: 98.59 – 98.59 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Granulocyte colony-stimulating factor (G-CSF or GCSF), also known as colony-stimulating factor 3 (CSF 3), is a glycoprotein that stimulates the bone marrow to produce granulocytes and stem cells and release them into the bloodstream. [5] [6]

Contents

Functionally, it is a cytokine and hormone, a type of colony-stimulating factor, and is produced by a number of different tissues. The pharmaceutical analogs of naturally occurring G-CSF are called filgrastim and lenograstim.

G-CSF also stimulates the survival, proliferation, differentiation, and function of neutrophil precursors and mature neutrophils.

Biological function

G-CSF is produced by endothelium, macrophages, and a number of other immune cells. The natural human glycoprotein exists in two forms, a 174- and 177-amino-acid-long protein of molecular weight 19,600 grams per mole. The more-abundant and more-active 174-amino acid form has been used in the development of pharmaceutical products by recombinant DNA (rDNA) technology.[ citation needed ]

White blood cells
The G-CSF-receptor is present on precursor cells in the bone marrow, and, in response to stimulation by G-CSF, initiates proliferation and differentiation into mature granulocytes. G-CSF stimulates the survival, proliferation, differentiation, and function of neutrophil precursors and mature neutrophils. G-CSF regulates them using Janus kinase (JAK)/signal transducer and activator of transcription (STAT) and Ras/mitogen-activated protein kinase (MAPK) and phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signal transduction pathway.[ citation needed ]
Hematopoietic System
G-CSF is also a potent inducer of hematopoietic stem cell (HSC) mobilization from the bone marrow into the bloodstream, although it has been shown that it does not directly affect the hematopoietic progenitors that are mobilized. [7]
Neurons
G-CSF can also act on neuronal cells as a neurotrophic factor. Indeed, its receptor is expressed by neurons in the brain and spinal cord. The action of G-CSF in the central nervous system is to induce neurogenesis, to increase the neuroplasticity and to counteract apoptosis. [8] [9] These properties are currently under investigations for the development of treatments of neurological diseases such as cerebral ischemia.[ citation needed ]

Genetics

The gene for G-CSF is located on chromosome 17, locus q11.2-q12. Nagata et al. found that the GCSF gene has four introns, and that two different polypeptides are synthesized from the same gene by differential splicing of mRNA. [10]

The two polypeptides differ by the presence or absence of three amino acids. Expression studies indicate that both have authentic GCSF activity.[ citation needed ]

It is thought that stability of the G-CSF mRNA is regulated by an RNA element called the G-CSF factor stem-loop destabilising element.[ citation needed ]

Medical use

Chemotherapy-induced neutropenia

Chemotherapy can cause myelosuppression and unacceptably low levels of white blood cells (leukopenia), making patients susceptible to infections and sepsis. G-CSF stimulates the production of granulocytes, a type of white blood cell. In oncology and hematology, a recombinant form of G-CSF is used with certain cancer patients to accelerate recovery and reduce mortality from neutropenia after chemotherapy, allowing higher-intensity treatment regimens. [11] It is administered to oncology patients via subcutaneous or intravenous routes. [12] A QSP model of neutrophil production and a PK/PD model of a cytotoxic chemotherapeutic drug (Zalypsis) have been developed to optimize the use of G-CSF in chemotherapy regimens with the aim to prevent mild-neutropenia. [13]

G-CSF was first trialled as a therapy for neutropenia induced by chemotherapy in 1988. The treatment was well tolerated and a dose-dependent rise in circulating neutrophils was noted. [14]

A study in mice has shown that G-CSF may decrease bone mineral density. [15]

G-CSF administration has been shown to attenuate the telomere loss associated with chemotherapy. [16]

Use in drug-induced neutropenia

Neutropenia can be a severe side effect of clozapine, an antipsychotic medication in the treatment of schizophrenia. G-CSF can restore neutrophil count. Following a return to baseline after stopping the drug, it may sometimes be safely rechallenged with the added use of G-CSF. [17] [18]

Before blood donation

G-CSF is also used to increase the number of hematopoietic stem cells in the blood of the donor before collection by leukapheresis for use in hematopoietic stem cell transplantation. For this purpose, G-CSF appears to be safe in pregnancy during implantation as well as during the second and third trimesters. [19] Breastfeeding should be withheld for three days after CSF administration to allow for clearance of it from the milk. [19] People who have been administered colony-stimulating factors do not have a higher risk of leukemia than people who have not. [19]

Stem cell transplants

G-CSF may also be given to the receiver in hematopoietic stem cell transplantation, to compensate for conditioning regimens. [16]

Side effect

The skin disease Sweet's syndrome is a known side effect of using this drug. [20]

History

Mouse granulocyte-colony stimulating factor (G-CSF) was first recognised and purified in Walter and Eliza Hall Institute, Australia in 1983, [21] and the human form was cloned by groups from Japan and Germany/United States in 1986. [10] [22]

The FDA approved the first biosimilar of Neulasta in June 2018. It is made by Mylan and sold as Fulphila. [23]

Pharmaceutical variants

The recombinant human G-CSF (rhG-CSF) synthesised in an E. coli expression system is called filgrastim. The structure of filgrastim differs slightly from the structure of the natural glycoprotein. Most published studies have used filgrastim.[ citation needed ]

Filgrastim was first marketed by Amgen with the brand name Neupogen. Several bio-generic versions are now also available in markets such as Europe and Australia. Filgrastim (Neupogen) and PEG-filgrastim (Neulasta) are two commercially available forms of rhG-CSF. The PEG (polyethylene glycol) form has a much longer half-life, reducing the necessity of daily injections.

Another form of rhG-CSF called lenograstim is synthesised in Chinese hamster ovary cells (CHO cells). As this is a mammalian cell expression system, lenograstim is indistinguishable from the 174-amino acid natural human G-CSF. No clinical or therapeutic consequences of the differences between filgrastim and lenograstim have yet been identified, but there are no formal comparative studies.

Research

G-CSF when given early after exposure to radiation may improve white blood cell counts, and is stockpiled for use in radiation incidents. [24] [25]

Mesoblast planned in 2004 to use G-CSF to treat heart degeneration by injecting it into the blood-stream, plus SDF (stromal cell-derived factor) directly to the heart. [26]

G-CSF has been shown to reduce inflammation, reduce amyloid beta burden, and reverse cognitive impairment in a mouse model of Alzheimer's disease. [27]

Due to its neuroprotective properties, G-CSF is currently under investigation for cerebral ischemia in a clinical phase IIb [28] and several clinical pilot studies are published for other neurological disease such as amyotrophic lateral sclerosis [29] A combination of human G-CSF and cord blood cells has been shown to reduce impairment from chronic traumatic brain injury in rats. [30]

See also

Related Research Articles

<span class="mw-page-title-main">Haematopoiesis</span> Formation of blood cellular components

Haematopoiesis is the formation of blood cellular components. All cellular blood components are derived from haematopoietic stem cells. In a healthy adult human, roughly ten billion to a hundred billion new blood cells are produced per day, in order to maintain steady state levels in the peripheral circulation.

<span class="mw-page-title-main">Neutropenia</span> Abnormally low concentration of neutrophils (a type of white blood cell) in the blood

Neutropenia is an abnormally low concentration of neutrophils in the blood. Neutrophils make up the majority of circulating white blood cells and serve as the primary defense against infections by destroying bacteria, bacterial fragments and immunoglobulin-bound viruses in the blood. People with neutropenia are more susceptible to bacterial infections and, without prompt medical attention, the condition may become life-threatening.

Bone marrow suppression also known as myelotoxicity or myelosuppression, is the decrease in production of cells responsible for providing immunity (leukocytes), carrying oxygen (erythrocytes), and/or those responsible for normal blood clotting (thrombocytes). Bone marrow suppression is a serious side effect of chemotherapy and certain drugs affecting the immune system such as azathioprine. The risk is especially high in cytotoxic chemotherapy for leukemia. In the case of non-small-cell lung cancer, myelosuppression predisposition was shown to be modulated by enhancer mutations.

<span class="mw-page-title-main">Filgrastim</span> Medication

Filgrastim, sold under the brand name Neupogen among others, is a medication used to treat low neutrophil count. Low neutrophil counts may occur with HIV/AIDS, following chemotherapy or radiation poisoning, or be of an unknown cause. It may also be used to increase white blood cells for gathering during leukapheresis. It is given either by injection into a vein or under the skin. Filgrastim is a leukocyte growth factor.

<span class="mw-page-title-main">Granulocyte-macrophage colony-stimulating factor</span> Mammalian protein found in Homo sapiens

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, natural killer cells, endothelial cells and fibroblasts that functions as a cytokine. The pharmaceutical analogs of naturally occurring GM-CSF are called sargramostim and molgramostim.

<span class="mw-page-title-main">Interleukin 3</span> Protein-coding gene in the species Homo sapiens

Interleukin 3 (IL-3) is a protein that in humans is encoded by the IL3 gene localized on chromosome 5q31.1. Sometimes also called colony-stimulating factor, multi-CSF, mast cell growth factor, MULTI-CSF, MCGF; MGC79398, MGC79399: after removal of the signal peptide sequence, the mature protein contains 133 amino acids in its polypeptide chain. IL-3 is produced as a monomer by activated T cells, monocytes/macrophages and stroma cells. The major function of IL-3 cytokine is to regulate the concentrations of various blood-cell types. It induces proliferation and differentiation in both early pluripotent stem cells and committed progenitors. It also has many more specific effects like the regeneration of platelets and potentially aids in early antibody isotype switching.

<span class="mw-page-title-main">Cyclic neutropenia</span> Medical condition

Cyclic neutropenia (CyN) is a rare hematologic disorder and form of congenital neutropenia that tends to occur approximately every three weeks and lasting for few days at a time due to changing rates of neutrophil production by the bone marrow. It causes a temporary condition with a low absolute neutrophil count and because the neutrophils make up the majority of circulating white blood cells it places the body at severe risk of inflammation and infection. In comparison to severe congenital neutropenia, it responds well to treatment with granulocyte colony-stimulating factor (filgrastim), which increases the neutrophil count, shortens the cycle length, as well decreases the severity and frequency of infections.

Severe congenital neutropenia (SCN), also often known as Kostmann syndrome or disease, is a group of rare disorders that affect myelopoiesis, causing a congenital form of neutropenia, usually without other physical malformations. SCN manifests in infancy with life-threatening bacterial infections. It causes severe pyogenic infections. It can be caused by autosomal dominant inheritance of the ELANE gene, autosomal recessive inheritance of the HAX1 gene. There is an increased risk of leukemia and myelodysplastic cancers.

Colony-stimulating factors (CSFs) are secreted glycoproteins that bind to receptor proteins on the surfaces of committed progenitors in the bone marrow, thereby activating intracellular signaling pathways that can cause the cells to proliferate and differentiate into a specific kind of blood cell.

Sargramostim is a recombinant granulocyte macrophage colony-stimulating factor (GM-CSF) that functions as an immunostimulator.

<span class="mw-page-title-main">Macrophage colony-stimulating factor</span> Mammalian protein found in humans

The colony stimulating factor 1 (CSF1), also known as macrophage colony-stimulating factor (M-CSF), is a secreted cytokine which causes hematopoietic stem cells to differentiate into macrophages or other related cell types. Eukaryotic cells also produce M-CSF in order to combat intercellular viral infection. It is one of the three experimentally described colony-stimulating factors. M-CSF binds to the colony stimulating factor 1 receptor. It may also be involved in development of the placenta.

<span class="mw-page-title-main">Granulopoiesis</span> Part of haematopoiesis, that leads to the production of granulocytes

Granulopoiesis is a part of haematopoiesis, that leads to the production of granulocytes. A granulocyte, also referred to as a polymorphonuclear leukocyte (PMN), is a type of white blood cell that has multi lobed nuclei, usually containing three lobes, and has a significant amount of cytoplasmic granules within the cell. Granulopoiesis takes place in the bone marrow. It leads to the production of three types of mature granulocytes: neutrophils, eosinophils and basophils.

<span class="mw-page-title-main">Granulocyte colony-stimulating factor receptor</span> Protein-coding gene in the species Homo sapiens

The granulocyte colony-stimulating factor receptor (G-CSF-R) also known as CD114 is a protein that in humans is encoded by the CSF3R gene. G-CSF-R is a cell-surface receptor for the granulocyte colony-stimulating factor (G-CSF). The G-CSF receptors belong to a family of cytokine receptors known as the hematopoietin receptor family. The granulocyte colony-stimulating factor receptor is present on precursor cells in the bone marrow, and, in response to stimulation by G-CSF, initiates cell proliferation and differentiation into mature neutrophilic granulocytes and macrophages.

<span class="mw-page-title-main">Granulocyte-macrophage colony-stimulating factor receptor</span> Protein-coding gene in humans

The granulocyte-macrophage colony-stimulating factor receptor, also known as CD116, is a receptor for granulocyte-macrophage colony-stimulating factor, which stimulates the production of white blood cells. In contrast to M-CSF and G-CSF which are lineage specific, GM-CSF and its receptor play a role in earlier stages of development. The receptor is primarily located on neutrophils, eosinophils and monocytes/macrophages, it is also on CD34+ progenitor cells (myeloblasts) and precursors for erythroid and megakaryocytic lineages, but only in the beginning of their development.

Molgramostim is a recombinant granulocyte macrophage colony-stimulating factor which functions as an immunostimulator.

<span class="mw-page-title-main">Peripheral stem cell transplantation</span> Method of replacing blood-forming stem cells

Peripheral blood stem cell transplantation (PBSCT), also called "Peripheral stem cell support", is a method of replacing blood-forming stem cells. Stem cells can be destroyed through cancer treatments such as chemotherapy or radiation, as well as any blood-related diseases, such as leukemia, lymphoma, neuroblastoma and multiple myeloma. PBSCT is now a much more common procedure than its bone marrow harvest equivalent due to the ease and less invasive nature of the procedure. Studies suggest that PBSCT has a better outcome in terms of the number of hematopoietic stem cell yield.

<span class="mw-page-title-main">CFU-GEMM</span>

CFU-GEMM is a colony forming unit that generates myeloid cells. CFU-GEMM cells are the oligopotential progenitor cells for myeloid cells; they are thus also called common myeloid progenitor cells or myeloid stem cells. "GEMM" stands for granulocyte, erythrocyte, monocyte, megakaryocyte.

<span class="mw-page-title-main">Reticular dysgenesis</span> Medical condition

Reticular dysgenesis (RD) is a rare, inherited autosomal recessive disease that results in immunodeficiency. Individuals with RD have mutations in both copies of the AK2 gene. Mutations in this gene lead to absence of AK2 protein. AK2 protein allows hematopoietic stem cells to differentiate and proliferate. Hematopoietic stem cells give rise to blood cells.

A granulocyte transfusion is a medical procedure in which granulocytes are infused into a person's blood. Granulocyte transfusions were historically used to prevent and treat infections in people with neutropenia, but the practice declined in popularity in the 1980s. Interest in the procedure increased in the 1990s due to the development of more effective methods for harvesting granulocytes and a growing population of people with severe neutropenia from chemotherapy. However, the treatment's efficacy remains poorly understood and its use is controversial.

Lipegfilgrastim, sold under the brand name Lonquex, is a medication used to reduce the duration of neutropenia and the incidence of febrile neutropenia in adults. It is given by injection under the skin in the abdomen, upper arm or thigh.

References

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