Interleukin-10 Conjugation to Carboxylated PVP-Coated Silver Nanoparticles for Improved Stability and Therapeutic Efficacy

• Published in: Nanomaterials (Basel, Switzerland) Vol. 7; no. 7; p. 165
• Main Authors: Baganizi, Dieudonné R, Nyairo, Elijah, Duncan, Skyla A, Singh, Shree R, Dennis, Vida A
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 02-07-2017; MDPI
• Subjects: anti-inflammatory effect; bioconjugation; Carbodiimide; Chemical compounds; Conjugation; Crosslinking; Cytokines; Denaturation; Drug delivery; Drug delivery systems; Effectiveness; Immunosuppression; Inflammatory diseases; inflammatory mediators; Interleukin 10; Interleukins; Nanoparticles; Nanotubes; Pharmacology; poly(vinylpyrolidone) (PVP); Polyethylene glycol; Polyethylenes; Proteins; Proteolysis; PVP-coated silver nanoparticles; Shelf life; Silver; Storage stability; inflammatory mediators; bioconjugation; PVP-coated silver nanoparticles; storage stability; anti-inflammatory effect; interleukin-10; poly(vinylpyrolidone) (PVP)
• ISSN: 2079-4991; 2079-4991
• DOI: 10.3390/nano7070165

Interleukin-10 (IL-10) is a key anti-inflammatory and immunosuppressive cytokine and therefore represents a potential therapeutic agent especially in inflammatory diseases. However, despite its proven therapeutic efficacy, its short half-life and proteolytic degradation in vivo combined with its low storage stability have limited its therapeutic use. Strategies have been developed to overcome most of these shortcomings, including in particular bioconjugation with stabilizing agents such as polyethylene glycol (PEG) and poly (vinylpyrolidone) (PVP), but so far these have had limited success. In this paper, we present an alternative method consisting of bioconjugating IL-10 to PVP-coated silver nanoparticles (Ag-PVPs) in order to achieve its storage stability by preventing denaturation and to improve its anti-inflammatory efficacy. Silver nanoparticles capped with a carboxylated PVP were produced and further covalently conjugated with IL-10 protein by carbodiimide crosslinker chemistry. The IL-10 conjugated Ag-PVPs exhibited increased stability and anti-inflammatory effectiveness in vitro. This study therefore provides a novel approach to bioconjugating PVP-coated silver nanoparticles with therapeutic proteins, which could be useful in drug delivery and anti-inflammatory therapies.