Pectin-based microspheres for colon-specific delivery of vancomycin

Area of Science:

• Biomaterials Science
• Drug Delivery Systems
• Colonic Drug Targeting

Background:

• Colon-specific drug delivery is crucial for treating colonic diseases and improving therapeutic efficacy.
• Pectin and chitosan are biocompatible polymers with potential for developing targeted drug delivery systems.

Purpose of the Study:

• To develop and characterize a colon-specific drug delivery system using pectin-chitosan hydrogels.
• To evaluate the in vitro release profile of vancomycin hydrochloride from pectin-chitosan microspheres under various pH conditions.

Main Methods:

• Pectin-chitosan hydrogels were prepared at different weight ratios and loaded with vancomycin hydrochloride.
• Microspheres were characterized for morphology, swelling, mucoadhesion, and drug loading efficiency.
• In vitro drug release studies were conducted at pH 2.0, 5.5, and 7.4, with and without pectinase.

Main Results:

• Water uptake increased with higher pH and pectin/chitosan ratio.
• Drug release was higher at increased pH and significantly enhanced by pectinase due to pectin degradation.
• Pectin/chitosan ratio influenced drug availability, decreasing it with higher ratios.

Conclusions:

• Pectin-chitosan microspheres demonstrate pH-dependent drug release, suitable for colon targeting.
• The system effectively limits drug release in acidic environments and facilitates release in the colon.
• These microspheres hold potential as a colon-specific drug delivery vehicle for vancomycin.