α-Mangostin, Chitosan and Collagen: Nanoparticle Hydrogels as a New Generation of Wound Healing
Modern wound care faces major challenges: both chronic and acute wounds require more than simple protection - they need targeted support of the body’s natural healing processes. Innovative delivery systems that combine bioactivity, biocompatibility and controlled release are therefore gaining increasing attention.
A recent study clearly demonstrates the potential of α-mangostin-loaded chitosan/collagen nanoparticles incorporated into a hydrogel matrix for enhanced wound healing.
α-Mangostin: A Powerful Natural Compound with Limited Solubility
α-Mangostin is a bioactive phytochemical derived from the mangosteen fruit and is known for its antioxidant, anti-inflammatory and antimicrobial properties. These characteristics make it particularly attractive for wound healing applications, where modulation of inflammation and promotion of tissue regeneration are crucial.
However, its practical use is limited by one key drawback: α-mangostin exhibits very poor water solubility, resulting in low bioavailability and reduced therapeutic efficacy. This is where advanced nanocarrier systems provide a decisive advantage.
Chitosan as a Key Material for Bioactive Nanoparticles
Chitosan has established itself as a versatile biopolymer in pharmaceutical, medical and cosmetic applications. Its advantages include:
- excellent biocompatibility and biodegradability
- strong film-forming and bioadhesive properties
- intrinsic wound-healing activity
- suitability for controlled drug delivery
In the referenced study, α-mangostin-loaded chitosan nanoparticles were prepared via ionic gelation. Crosslinking chitosan with sodium tripolyphosphate (TPP) resulted in stable nanoparticles with an average size of approximately 300 nm - well suited for topical application.
Most notably, this formulation led to a fourfold increase in the apparent solubility of α-mangostin compared to the pure compound, combined with a very high encapsulation efficiency (> 90 %).
Collagen as a Functional Complement
To further optimize nanoparticle performance, chitosan was combined with collagen. Collagen is a key structural protein of the extracellular matrix and plays an essential role in cell adhesion, migration and tissue regeneration
The incorporation of collagen resulted in:
- stable, amorphous nanoparticles
- very high encapsulation efficiency (> 94 %)
- improved structural integrity
- sustained and controlled drug release
This creates a synergistic system in which both the active compound (α-mangostin) and the polymeric matrix (chitosan/collagen) actively contribute to wound healing.
Hydrogel Formulations for Topical Application
The nanoparticles were subsequently embedded into Carbopol-based hydrogels, a well-established dosage form in wound care. Hydrogels are particularly valued because they:
- maintain a moist wound environment
- absorb wound exudate
- allow gas exchange
- enable uniform and sustained drug delivery
All tested formulations exhibited skin-compatible pH values (approximately 6.5 to 7.0) as well as favorable spreadability and swelling behavior. The hydrogel containing α-mangostin-loaded chitosan nanoparticles showed especially promising performance, providing uniform application and prolonged release of the active ingredient.
Significantly Accelerated Wound Healing In Vivo
The full potential of the system became evident in the in vivo wound model. Hydrogels containing α-mangostin-loaded chitosan or chitosan/collagen nanoparticles achieved almost complete wound closure (~ 98 to 99 %) after 21 days, clearly outperforming both α-mangostin hydrogels without nanoparticles and control formulations.
These results highlight that the delivery system itself plays a decisive role, often more important than the active compound alone.
Which Chitosan Is Suitable for Such Applications?
In the study, chitosan with a molecular weight of approximately 300 kDa and a degree of deacetylation of about 81 % was used. This specification offers several advantages:
sufficient charge density for stable ionic crosslinking
- good film-forming and mechanical properties
- an optimal balance between solubility and structural stability
For pharmaceutical, medical device and cosmetic applications, the following characteristics are particularly recommended:
- high-purity, GMP-compliant chitosan
- controlled degree of deacetylation (typically 75 to 90 %)
- reproducible molecular weight (e.g. 100 to 400 kDa, depending on the application)
- low endotoxin and heavy metal levels
Especially for nanoparticle systems and hydrogels, consistent quality is essential to reliably control particle size, drug release behavior and biological performance.
Conclusion: Chitosan-Based Nanohydrogels as a Platform Technology
The combination of chitosan, collagen and bioactive natural compounds such as α-mangostin opens new perspectives for advanced wound care. Nanoparticle-based hydrogels integrate protection, bioactivity and controlled release into a single, highly functional system.
For developers and manufacturers in pharmaceuticals, medical devices, cosmetics and biomaterials, this study clearly demonstrates that chitosan is far more than an excipient - it is a key material for next-generation functional delivery systems.
Source
Kusnadi, Y. Herdiana, E. Rochima, I. M. Joni, O. N. Putra, A. M. Gazzali, M. Muchtaridi: The Potential of α-Mangostin-Loaded Chitosan/Collagen Nanoparticles in Hydrogel Formulation for Enhanced Wound Healing. Nanotechnology, Science and Applications, 2026, 19, 1–24. https://doi.org/10.2147/NSA.S563394
First published on 15th of January 2026
Revised on 15th of January 2026