Guar-Based Injectable Hydrogel for Drug Delivery and In Vitro Bone Cell Growth.

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Tissue Engineering

Background:

• Injectable hydrogels are advantageous for minimally invasive tissue engineering and drug delivery due to their tunable properties and biocompatibility.
• Guar gum derivatives and cyclodextrins are explored for creating advanced hydrogel systems.
• Host-guest interactions offer a mechanism for hydrogel formation and controlled release.

Purpose of the Study:

• To synthesize and characterize a novel injectable hydrogel using guar adamantane (Guar-ADI) and poly-β-cyclodextrin (p-βCD).
• To evaluate the hydrogel's potential for controlled in vitro drug delivery.
• To assess the hydrogel's biocompatibility and suitability as a scaffold for cell growth.

Main Methods:

• Synthesis of Guar-ADI via reaction of guar gum with 1-adamantyl isocyanate.
• Hydrogel formation by rehydrating Guar-ADI and p-βCD in phosphate-buffered saline (PBS).
• Comprehensive material characterization using NMR, FTIR, SEM, EDS, XRD, TGA, and rheology.
• In vitro drug release studies with bovine serum albumin (BSA) and anastrozole.
• In vitro cell culture studies using mouse osteoblastic MC3T3 cells.

Main Results:

• Successful synthesis of an injectable hydrogel formed through host-guest interactions.
• Characterization confirmed the hydrogel's structure and properties.
• Controlled, first-order kinetics release of BSA and anastrozole was observed.
• The hydrogel demonstrated excellent biocompatibility and promoted MC3T3 cell proliferation.

Conclusions:

• The synthesized Guar-ADI/p-βCD hydrogel is a promising injectable biomaterial.
• It exhibits controlled drug release capabilities suitable for pharmaceutical applications.
• The hydrogel serves as an effective scaffold for osteoblast cell growth, indicating potential in bone tissue engineering.