Stimuli-responsive hydrogels in drug delivery and tissue engineering

Area of Science:

• Polymer science and materials science
• Biomedical engineering
• Drug delivery systems

Background:

• Hydrogels are 3D polymer networks capable of absorbing large amounts of water.
• They are extensively studied for controlled drug release applications due to their biocompatibility and tunable properties.
• Hydrogels exhibit sensitivity to various stimuli like pH, temperature, and electric fields.

Purpose of the Study:

• To review the opportunities and challenges in the field of hydrogels for drug delivery.
• To highlight the role of stimuli-responsive hydrogels in developing next-generation self-regulated delivery systems.
• To summarize literature on how external stimuli control drug release from hydrogels.

Main Methods:

• Literature review of stimuli-sensitive hydrogels.
• Analysis of hydrogel properties such as swelling, biocompatibility, and sensitivity.
• Examination of drug release mechanisms controlled by temperature, pH, electric potential, and ionic strength.

Main Results:

• Stimuli-responsive hydrogels demonstrate significant potential for controlled zero-order drug release.
• Tunable properties allow for the design of self-regulated drug delivery systems.
• External stimuli like temperature, pH, electric potential, and ionic strength effectively modulate drug release kinetics.

Conclusions:

• Hydrogels represent a promising platform for advanced, self-regulated drug delivery systems.
• Stimuli-responsive hydrogels offer precise control over drug release profiles.
• Further research into hydrogel-based systems can overcome current challenges and unlock new therapeutic possibilities.