Cloning and characterisation of an ovine interleukin-10-encoding cDNA

Area of Science:

• Immunology
• Molecular Biology
• Ovine Genetics

Background:

• Interleukin-10 (IL-10) is a critical cytokine involved in immune regulation.
• Understanding ovine IL-10 is essential for advancing sheep immunology and health.
• Previous characterization of ovine IL-10 was limited.

Purpose of the Study:

• To isolate and characterize the ovine interleukin-10 (IL-10) gene.
• To determine the biological activity of the expressed ovine IL-10 protein.
• To investigate the role of ovine IL-10 in regulating ovine immune cells.

Main Methods:

• Northern blot and Polymerase Chain Reaction (PCR) analyses were used to detect IL-10 mRNA expression.
• A human IL-10 cDNA probe and specific primers were employed for detection.
• Cloning and sequencing of the ovine IL-10 cDNA, followed by expression in a mammalian system.

Main Results:

• The full-length ovine IL-10 cDNA sequence was isolated, encoding a 177 amino acid protein.
• Expressed ovine IL-10 demonstrated biological activity, inhibiting pro-inflammatory cytokine production (IL-1 and TNF-α) by ovine macrophages.
• Genomic DNA analysis confirmed that ovine IL-10 exists as a single gene in the ovine genome.

Conclusions:

• The ovine IL-10 gene has been successfully isolated and characterized.
• Ovine IL-10 functions as an immunosuppressive cytokine, similar to its human and murine counterparts.
• This research provides a foundation for further studies on the role of IL-10 in ovine immune responses and disease.