Overview
Feline Interferon is a recombinant protein derived from feline interferon omega (IFN-ω), a type I interferon naturally produced by cats in response to viral infections. It is widely used in veterinary medicine due to its antiviral and immunomodulatory properties. Unlike human interferons, feline interferon is species-specific, ensuring higher efficacy and fewer side effects in cats. Commercial feline interferon is typically produced using recombinant DNA technology in bacterial or yeast expression systems. The product is available in lyophilized form for reconstitution or as a ready-to-use solution. Its primary mechanism of action involves inhibiting viral replication and enhancing the host's immune response.
Physical and Chemical Properties
Feline interferon is a glycoprotein with a molecular weight of approximately 19-20 kDa. It is stable in lyophilized form but sensitive to heat, light, and repeated freeze-thaw cycles in solution. The protein retains its biological activity within a pH range of 2-10 and is soluble in water or saline buffers. For quality control, potency is measured in international units (IU) per milligram, with typical commercial preparations ranging from 1-10 million IU/mg. Purity is assessed via SDS-PAGE or HPLC, with most pharmaceutical-grade products exceeding 95% purity. The lyophilized powder is white to off-white, while reconstituted solutions are clear and colorless.
Main Applications
The primary clinical use of feline interferon is for managing viral infections in cats, particularly feline leukemia virus (FeLV), feline immunodeficiency virus (FIV), and feline calicivirus. It is administered either systemically (subcutaneous or intravenous) or topically (oral or ocular), depending on the infection site. In veterinary oncology, feline interferon is sometimes used as an adjunct therapy for virus-associated tumors. Recent studies also explore its potential in treating chronic gingivostomatitis and feline infectious peritonitis (FIP). Off-label uses include prophylactic treatment in multi-cat households with high infection risk.
Safety and Storage
Feline interferon is generally well-tolerated, with adverse effects reported in less than 5% of cases. These may include transient fever, lethargy, or mild gastrointestinal symptoms. Contraindications include known hypersensitivity to interferon products or concurrent use with immunosuppressive drugs. Proper storage is critical for maintaining potency. Lyophilized products should be kept at 2-8°C and protected from light. Reconstituted solutions are stable for 24-48 hours when refrigerated. Freezing should be avoided as it may cause protein denaturation. Always check for precipitation or discoloration before administration.
B2B Procurement Guide
When sourcing feline interferon, prioritize suppliers with GMP certification and documented quality control processes. Key specifications to verify include biological activity (IU/mg), endotoxin levels (<5 EU/mg), and sterility testing results. Batch-to-batch consistency is crucial for clinical efficacy. Consider ordering lyophilized formulations for extended shelf life and lower shipping costs. For large-scale procurement, negotiate bulk pricing and confirm cold chain logistics. Regulatory compliance varies by region—ensure products meet FDA, EMA, or local veterinary drug regulations. Always request certificates of analysis (CoA) and stability data.
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