937932
Protein delivery system
Human CXCL8, PODS®
Synonym(s):
PODS®
biological source
(Spodoptera frugiperda (Sf9) cell culture)
form
(monodisperse crystals)
packaging
1 ea of 25 μg
technique(s)
: suitable using 3D bioprinting | cell culture
impurities
<0.06 EU/mL Endotoxin
color
colorless
storage temp.
2-8°C
Quality Level
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General description
Protein delivery system, Human CXCL8, PODS contains the polyhedrin protein co-crystalized with Human mature IL-8 (amino acids 23-99) which lacks the signal peptide and MDNCFα fragment. IL-8, also known as CXCL8 is a member of the CXC subfamily of chemokines and a major mediator of the inflammatory response. IL-8 functions as a chemotactic factor that attracts neutrophils as well as other granulocytes to sites of inflammation. It is secreted by several cell types including mononuclear macrophages, neutrophils, eosinophils, T-lymphocytes, fibroblast and epithelial cells in response to inflammatory stimuli. IL-8 also plays important functions in neutrophil activation, tumour migration, invasion and angiogenesis.
Application
PODS are composed of a bioactive cargo protein within a polyhedrin crystal lattice, with polyhedrin as the main protein. The 25 µg SKU size indicates the amount of bioactive cargo, typically 0.5% to 5% of the total protein. For instance, a 25 µg SKU at a 2% cargo loading contains 1.25 mg of total protein. PODS enable sustained release of cargo proteins when proteases degrade the polyhedrin scaffold. Growth factors are not bioavailable until released, and their concentration in media depends on the amount added and the release rate. In 10% serum, peak levels are usually reached within 24-48 hours, with about 20% of the cargo becoming soluble.
PODS often require lower concentrations than conventional growth factors, as they maintain effective levels. Pre-incubating with serum or proteases enhances availability, while conventional factors can be added for immediate effects. Optimal amounts should be determined empirically.
PODS often require lower concentrations than conventional growth factors, as they maintain effective levels. Pre-incubating with serum or proteases enhances availability, while conventional factors can be added for immediate effects. Optimal amounts should be determined empirically.
Features and Benefits
- Protein delivery system, PODS Human CXCL8, PODS comes with molecular weight of 14 kDa, length 122 aa, with endotoxin level of <0.06 EU/ml as measured by gel clot LAL assay. PODS co-crystals may be reconstituted at 200 million co-crystals/ml in sterile PBS. 20% glucose has a buoyant density closer to PODS co-crystals and can be useful for aliquoting.
- This product is produced with no animal derived raw products. All processing and handling employs animal free equipment and animal free protocols. PODS co-crystals are highly stable when stored in aqueous solution (pH range 6 - 8).
- PODS provides durability, stability AND sustained release, addressing the limitations of conventional and enabling researchers to effortlessly control and manipulate cells in 2D and 3D culture as well as in-vivo.
Legal Information
PODS is a registered trademark of Cell Guidance Systems Ltd
Storage Class
11 - Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
Regulatory Information
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Elevated serum interleukin-8 is associated with enhanced intratumor neutrophils and reduced clinical benefit of immune-checkpoint inhibitors
Schalper K A, et al.
Nature Medicine, 26(5), 688-692 (2020)
The CXCL8-CXCR1/2 pathways in cancer
Liu Q, et al.
Cytokine & Growth Factor Reviews, 31, 61-71 (2016)
Chemokines and their receptors promoting the recruitment of myeloid-derived suppressor cells into the tumor
Bao-Hua Li, et al.
Molecular Immunology, 117, 201-215 (2020)
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