Tannic acid-based nanogel as an efficient anti-inflammatory agent.

Area of Science:

• Biomaterials Science
• Nanotechnology
• Immunology

Background:

• Reactive oxygen species (ROS) are crucial signaling molecules but their overproduction causes inflammatory diseases.
• Existing antioxidants like natural polyphenols or synthetic compounds have limitations including side effects and safety concerns.

Purpose of the Study:

• To develop a biocompatible tannic acid-based nanogel (PTNG) as an effective scavenger of ROS.
• To evaluate the antioxidant and anti-inflammatory potential of PTNG in vitro and in vivo.

Main Methods:

• PTNG was synthesized by forming phenylboronic ester bonds between polymeric phenylboronate and tannic acid.
• ROS scavenging activity was assessed using various assays.
• Biocompatibility and anti-inflammatory effects were evaluated in vitro using an induced inflammation model.
• Efficacy was tested in vivo using a zymosan-induced peritonitis mouse model.

Main Results:

• PTNG exhibited significant ROS scavenging capabilities.
• In vitro studies demonstrated high biocompatibility and strong anti-inflammatory effects of PTNG.
• In vivo experiments showed PTNG effectively reduced neutrophil recruitment and pro-inflammatory cytokines in an acute inflammation model.

Conclusions:

• PTNG is a promising biocompatible antioxidant with potent ROS scavenging and anti-inflammatory activities.
• PTNG holds potential for treating inflammatory diseases driven by ROS overproduction.