Overview
Rat interferon (Rat IFN) is a cytokine secreted by rat cells in response to viral infections, tumors, or other immune stimuli. It belongs to the interferon family, which includes Type I (IFN-α/β), Type II (IFN-γ), and Type III (IFN-λ) subtypes. Rat IFN is widely used in preclinical research to study immune responses, viral pathogenesis, and therapeutic interventions. As a species-specific protein, rat interferon exhibits biological activity only in rat-derived cells or models. Researchers utilize it to investigate mechanisms of innate immunity, antiviral defenses, and immunomodulation. Its applications span basic science, drug development, and vaccine research.
Physical and Chemical Properties
Rat interferon is typically supplied as a lyophilized powder or sterile solution. The molecular weight varies by subtype, with most forms ranging between 20-30 kDa. It is sensitive to heat and proteolytic degradation, requiring storage at -20°C or lower temperatures. The protein is soluble in standard aqueous buffers such as PBS or cell culture media. Its activity is pH-dependent, with optimal stability observed in neutral to slightly acidic conditions (pH 6-7.5). Formulations often include stabilizers like albumin or glycerol to prevent aggregation during storage.
Main Applications
In biomedical research, rat interferon serves three primary purposes: as an immune modulator in experimental models, as a tool to study interferon signaling pathways, and as a control in assay development. It is frequently used in rodent studies of viral infections (e.g., hepatitis, influenza) and autoimmune diseases. Pharmaceutical companies employ rat IFN in preclinical testing of immunotherapies and antiviral drugs. Academic researchers use it to investigate cytokine networks and host-pathogen interactions. Some specialized applications include enhancing antigen presentation in vaccine studies and modulating macrophage activity in inflammation models.
Safety and Storage
Rat interferon should be handled as a potential biohazard material. Use gloves, lab coats, and eye protection when handling. Avoid generating aerosols during reconstitution. In case of skin contact, wash immediately with soap and water. For long-term storage, maintain lyophilized powder at -20°C or below. Reconstituted solutions can be aliquoted and stored at -80°C for several months. Avoid repeated freeze-thaw cycles, which degrade protein integrity. Always verify activity after prolonged storage through bioassays.
B2B Procurement Guide
When procuring rat interferon commercially, prioritize suppliers with ISO 13485 or GMP certification for research reagents. Key specifications to verify include: purity (>95% by SDS-PAGE), endotoxin levels (<1 EU/μg), and biological activity (stated in international units per mg). Consider application-specific requirements: some studies may need carrier-free formulations, while others benefit from stabilized versions. Bulk purchasing (10mg+) typically reduces unit costs by 30-50%. For specialized subtypes (e.g., IFN-γ), lead times of 4-6 weeks are common. Request certificates of analysis for each batch.
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