Development of a tree shrew-specific interferon-gamma assay.

Area of Science:

• Immunology
• Animal Models
• Biotechnology

Background:

• Tree shrews (Tupaia belangeri) are closely related to primates and susceptible to human viruses, making them valuable animal models.
• A lack of standardized assays for detecting tree shrew-specific interferon-gamma (IFN-γ) hinders research into their antiviral immunity.

Purpose of the Study:

• To develop and validate a novel enzyme-linked immunosorbent assay (ELISA) for quantifying IFN-γ in tree shrew serum.
• To establish a tool for studying antiviral immune responses in tree shrew models of human viral infections.

Main Methods:

• Recombinant tree shrew IFN-γ (GST-TS-IFN-γ) was expressed in E. coli.
• Monoclonal and polyclonal antibodies against tree shrew IFN-γ were generated and optimized.
• A sandwich ELISA was developed with a detection limit of 20 ng/mL.

Main Results:

• The developed ELISA successfully quantified IFN-γ in mitogen-stimulated tree shrew blood samples.
• The assay detected native IFN-γ in serum samples from 50 healthy tree shrews.
• This represents the first ELISA-based measurement of IFN-γ in tree shrew serum.

Conclusions:

• A sensitive and specific ELISA for tree shrew IFN-γ has been successfully developed.
• This assay provides a crucial tool for immunological research using tree shrew models.
• The findings facilitate further investigation into viral pathogenesis and immune responses in tree shrews.