The Generation of an Engineered Interleukin-10 Protein With Improved Stability and Biological Function.

Area of Science:

• Immunology and Molecular Biology
• Biotechnology and Drug Development

Background:

• Interleukin-10 (IL-10) is a key immunoregulatory cytokine with anti-inflammatory properties.
• Native IL-10 functions as an unstable homodimer, limiting its therapeutic efficacy due to short half-life and degradation.
• Current IL-10 therapy shows limited success in treating human inflammatory diseases.

Purpose of the Study:

• To engineer a novel, stable dimer form of IL-10 with enhanced therapeutic potential.
• To evaluate the stability, activity, and anti-inflammatory efficacy of the engineered IL-10 dimer.

Main Methods:

• Generation of a head-to-tail linked IL-10 dimer using a flexible linker.
• Assessment of protein expression, biological activity (in vitro and in vivo), and stability (temperature and pH).
• Evaluation of IL-10 receptor binding and suppression of lipopolysaccharide (LPS)-induced inflammation in vivo.

Main Results:

• The novel IL-10 dimer demonstrated significantly improved temperature- and pH-dependent stability compared to natural IL-10.
• The dimer exhibited comparable IL-10 receptor binding and enhanced biological activity both in vitro and in vivo.
• Stable IL-10 dimer was more effective in suppressing LPS-induced inflammation than natural IL-10.

Conclusions:

• A novel, stable dimer version of IL-10 protein has been successfully developed.
• This engineered IL-10 dimer possesses superior stability and anti-inflammatory efficacy.
• The stable IL-10 dimer holds promise for developing targeted anti-inflammatory therapeutics.