Polyanhydride Chemistry

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Drug Delivery Systems

Background:

• Polyanhydrides (PAs) are synthetic, biodegradable polymers utilized in controlled drug delivery.
• They are synthesized from inexpensive materials and offer tunable properties.
• PAs exhibit biocompatibility, biodegradability, and produce non-toxic degradation products.

Purpose of the Study:

• To review advancements in synthetic biodegradable polyanhydrides for therapeutic delivery.
• To discuss various classes, structures, and properties of PAs.
• To explore factors influencing PA surface erosion and their applications.

Main Methods:

• Literature review focusing on synthetic biodegradable biomedical polyanhydrides.
• Analysis of PA synthesis methods and their biomedical applications.
• Discussion of physicochemical and mechanical properties influencing drug delivery.

Main Results:

• PAs function as surface-eroding carriers due to slower water penetration than bond cleavage.
• Drug release rate is governed by polymer erosion, influenced by structure, composition, and environmental factors.
• Diverse PA formulations (implants, nanoparticles) are developed for sustained release of drugs, vaccines, and nucleic acids.

Conclusions:

• Polyanhydrides offer promising characteristics for advanced therapeutic delivery systems.
• Their tunable properties and surface-eroding mechanism facilitate controlled and sustained release.
• PAs are valuable in developing novel drug, vaccine, and peptide delivery carriers.