Human Bone Sialoprotein
Overview
Human Bone Sialoprotein (BSP) is an acidic glycoprotein predominantly found in mineralized tissues like bone and dentin. It plays a pivotal role in bone formation by facilitating hydroxyapatite crystal growth and cell-matrix interactions. BSP is synthesized by osteoblasts and osteoclasts, making it a biomarker for bone remodeling processes. Researchers value BSP for its unique ability to bind calcium ions and collagen, which is critical for developing biomaterials and regenerative therapies. Its applications extend to dental implants and fracture healing, where it enhances osseointegration.
Physical and Chemical Properties
BSP has a molecular weight of approximately 70-80 kDa and is characterized by its high affinity for calcium due to phosphorylated serine residues. It is soluble in aqueous solutions and stable under physiological pH conditions. The protein’s structure includes RGD (Arg-Gly-Asp) sequences, which mediate cell adhesion via integrin receptors. Its thermal stability is moderate, but prolonged exposure to high temperatures or extreme pH can denature the protein. For laboratory use, BSP is typically supplied as a lyophilized powder to prolong shelf life.
Main Applications
In orthopedics, BSP is incorporated into scaffolds for bone grafts to accelerate healing. Its adhesive properties make it ideal for coatings on titanium implants, improving biocompatibility. Biotechnology firms utilize recombinant BSP to study osteogenesis and develop osteoporosis treatments. The pharmaceutical industry explores BSP’s potential in drug delivery systems targeting bone diseases. Additionally, diagnostic kits leverage BSP antibodies to detect bone turnover markers in clinical settings.
Safety and Storage
BSP requires handling in a controlled environment to prevent degradation. Use gloves and masks to avoid exposure, as inhalation of powdered forms may irritate respiratory tracts. Store lyophilized BSP at -20°C in airtight containers, and reconstitute with sterile buffers as needed. Dispose of waste according to biohazard protocols, especially when working with human-derived samples. Always refer to the Material Safety Data Sheet (MSDS) for specific handling guidelines.
B2B Procurement Guide
When sourcing BSP, prioritize suppliers with ISO certification or GMP compliance to ensure quality. Request certificates of analysis (CoA) detailing purity (>95% by SDS-PAGE) and endotoxin levels (<1 EU/mg). Bulk purchases may qualify for discounts but confirm stability data for long-term storage. Consider recombinant variants for consistency, especially in therapeutic applications. Lead times vary; plan orders ahead for customized formulations. For research-grade BSP, compare offerings from specialized biotech distributors.
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