Alginate Hydrogels: Methods of Preparation and Application in Tissue Engineering and Targeted Drug Delivery

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Biotechnology

Background:

• Alginic acid and its salts are widely used in tissue engineering, regenerative medicine, and pharmaceuticals.
• Their utility stems from biocompatibility, non-toxicity, and biodegradability.
• The anionic structure of alginate copolymers dictates their physicochemical properties.

Purpose of the Study:

• To review the effects of alginate's anionic structure on solution and gel properties.
• To analyze processing conditions for functional medical and biological products.
• To explore alginate interactions with bioactive substances for drug delivery and tissue engineering.

Main Methods:

• Literature review of alginate properties and applications.
• Analysis of the M/G block ratio's impact on alginate functionality.
• Examination of gelling mechanisms (ionic, hydrogen, covalent bonds).
• Investigation of alginate interactions with drugs and surfactants.

Main Results:

• Alginate's M/G block ratio and source significantly influence product functionality.
• Guluronic acid content affects susceptibility to H+-induced gelation.
• Solution viscosity and dissolution rates depend on ionic strength and pH.
• Alginate interactions with bioactive substances enable controlled release systems.

Conclusions:

• Understanding alginate structure-property relationships is crucial for developing advanced biomaterials.
• Alginates offer potential for creating dimensionally stable tissue engineering scaffolds.
• Alginate-based systems are promising for controlled drug delivery applications.