Purification and characterization of mouse serum interferon

Area of Science:

• Immunology
• Biochemistry
• Virology

Background:

• Newcastle disease virus (NDV) infection induces interferon (IFN) production in mouse serum.
• Interferons are crucial cytokines involved in the innate immune response against viral infections.
• Characterization of serum interferon is essential for understanding its role in antiviral immunity.

Purpose of the Study:

• To purify and characterize mouse serum interferon (MSIF) induced by NDV.
• To identify the specific protein fractions associated with interferon activity.
• To analyze the electrophoretic and immunodiffusion properties of purified MSIF.

Main Methods:

• Purification of MSIF using Sephadex G-100 gel filtration and DEAE cellulose column chromatography.
• Characterization of purified fractions by polyacrylamide gel disc electrophoresis (PGDE) and immunodiffusion.
• Analysis of serum protein profiles using cellulose acetate membrane electrophoresis (CAME).

Main Results:

• Two peaks with interferon activity were identified during purification.
• Specific protein bands associated with MSIF activity were detected between alpha1 and alpha2-globulin fractions.
• Immunodiffusion confirmed a single interferon-associated band, likely corresponding to the purified fractions.
• CAME indicated altered alpha1 and beta-globulin levels in MSIF compared to normal mouse serum.

Conclusions:

• Successful purification and partial characterization of mouse serum interferon induced by NDV were achieved.
• The study identified specific electrophoretic properties of MSIF, aiding in its identification.
• Further research can utilize these findings for a deeper understanding of interferon's role in antiviral defense.