Osteopontin/SPP1 is a secreted multifunctional glycoprotein. Its putative functions include roles in bone metabolism, immune regulation, wound healing, cell survival, and tumor progression. Osteopontin/SPP1 acts as a cytokine that is involved in enhancing production of interferon-gamma and interleukin-12 and reducing production of interleukin-10. It is essential in the pathway that leads to type I immunity. Osteopontin has been implicated as an important factor in bone remodeling. Specifically, research suggests it plays a role in anchoring osteoclasts to the mineral matrix of bones. The fact that SPP1 interacts with multiple cell surface receptors which are ubiquitously expressed makes it an active player in many physiological and pathological processes including wound healing, bone turnover, tumorigenesis, inflammation and ischemia.
Recombinant Human Osteopontin/SPP1 is produced by Mammalian expression system and the target gene encoding Ile17-Asn314 is expressed with a 6His tag at the C-terminus.
Accession: P10451
APMol Mass: 60-70 KDa, reducing conditions
Endotoxin: < 1 EU/µg as determined by LAL test
Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4.
| Solubility (25°C) | Dissolve the lyophilized protein in distilled water. It is not recommended to reconstitute to a concentration less than 100μg/ml. |
| Storage | Stored at ≤ -20°C, stable for one year after receipt. Reconstituted protein solution can be stored at 2-8°C for 2-7 days. |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
[1] Itai Rotem, et al. Basic Res Cardiol. Osteopontin promotes infarct repair
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