Granulocyte Macrophage Colony Stimulating Factor (GM-CSF), Human (P. pastoris-expressed)

Although lyophilized GenScript Sargramostim can remain stable at room temperature for three weeks, it is best stored desiccated below -18C. Upon reconstitution Sargramostim should be stored at 4C between 2-7 days and for future use below -18C. For long-term storage it is recommended to add a carrier protein (0.1% HSA or BSA). Please avoid freeze-thaw cycles.

Cytokine, Chemokines & Growth Factors

Granulocyte Macrophage Colony Stimulating Factor (GM-CSF), was initially characterized as a growth factor that can support the in vitro colony formation of granulocyte-macrophage progenitors. It is produced by a number of different cell types (including activated T cells, B cells, macrophages, mast cells, endothelial cells and fibroblasts) in response to cytokine of immune and inflammatory stimuli. Besides granulocyte-macrophage progenitors, GM-CSF is also a growth factor for erythroid, megakaryocyte and eosinophil progenitors. On mature hematopoietic, monocytes/ macrophages and eosinophils. GM-CSF has also been reported to have a functional role on non-hematopoitic cells. It can induce human endothelial cells to migrate and proliferate. Additionally, GM-CSF can also stimulate the proliferation of a number of tumor cell lines, including osteogenic sarcoma, carcinoma and adenocarcinoma cell lines. GenScript, Human Granulocyte Macrophage Colony Stimulating Factor (GM-CSF) (Sargramostim) , is a single, glycosylated polypeptide chain containing 127 amino acids and having a molecular mass of about 26, 000-32, 000 Da, as shown in SDS-PAGE. It differs from natural human GM-CSF by a substitution of leucine at position 23 (R to L), and the carbohydrate moiety may be different from the native protein.

The protein was lyophilized after extensive dialysis against 10mM Tris-HCl, pH8.5, 4% Mannitol, 1% Sucrose buffer.