Host-Guest Dynamic Behavior of Melatonin Encapsulated in β-Cyclodextrin Nanosponges

Area of Science:

• Nanomaterials Science
• Computational Chemistry
• Drug Delivery Systems

Background:

• Cyclodextrin-based nanosponges are porous nanomaterials with high surface area, suitable for drug encapsulation.
• Their complex structure necessitates advanced computational methods for detailed analysis.
• Melatonin, a neurohormone, has potential therapeutic applications as an antioxidant and immunomodulator.

Purpose of the Study:

• To develop full-atom models for β-cyclodextrin nanosponges cross-linked with citric acid.
• To investigate the flexibility of these nanosponges using molecular dynamics simulations.
• To analyze the interactions between nanosponges and encapsulated melatonin.

Main Methods:

• Construction of full-atom models for linear and cyclic β-cyclodextrin-citric acid nanosponges.
• Extensive molecular dynamics (MD) simulations to assess nanosponges' flexibility.
• Characterization of drug-nanosponge interactions, focusing on melatonin binding.

Main Results:

• Detailed atomistic models for β-cyclodextrin nanosponges with linear and cyclic topologies were generated.
• Molecular dynamics simulations revealed insights into the flexibility of these nanostructure constructs.
• Key interactions governing melatonin binding were identified, highlighting benefits from multivalence and crowding.

Conclusions:

• Computer modeling provides valuable atomistic insights into cyclodextrin nanosponges and their drug interactions.
• Melatonin's encapsulation within these nanosponges is favorably influenced by multivalence and crowding effects.
• This study advances the understanding of nanosponges for enhanced drug delivery applications.