Centella asiatica, widely known as Gotu kola, is a traditional herb celebrated for its benefits in skin health and wound healing. Recent research has provided new insights into its efficacy, particularly through topical applications. This review highlights the plant’s mechanisms, focusing on its active compounds such as asiaticoside, madecassoside, asiatic acid, and madecassic acid, which enhance collagen synthesis, modulate inflammation, and offer antioxidant protection. Clinical trials have been collected and summarized that innovative delivery systems, such as hydrogels, nanostructures or microneedles, can accelerate wound healing, reduce wound size, and improve recovery times in various wound types, including diabetic ulcers and burns. Future research will likely refine these technologies and explore new applications, reinforcing the role of C. asiatica in contemporary wound care. Advances in formulation and delivery will continue to enhance the plant’s therapeutic potential, offering promising solutions for effective wound management.
Centella asiatica extract is a valued plant material with known anti-inflammatory and anti-microbiological properties. Using the Design of Experiment (DoE) approach, it was possible to obtain an optimized water/alcoholic extract from Centella asiatica, which allowed the preparation of the final material with biological activity in the wound healing process. Studies on the novel applications of Centella asiatica in conjunction with the multifunctional chitosan carrier have been motivated by the plant’s substantial pharmacological activity and the need to develop new and effective methods for the treatment of chronic wounds. The controlled release of asiaticoside was made possible by the use of chitosan as a carrier. Based on the findings of investigations using the PAMPA skin assay, which is a model imitating the permeability of actives through skin, this compound, characterized by sustained release from the chitosan delivery system, was identified as being well able to permeate biological membranes such as skin. Chitosan and the lyophilized extract of Centella asiatica worked synergistically to block hyaluronidase, exert efficient microbiological activity and take part in the wound healing process, as proven in an in vitro model. A formulation containing 3% extract with 3% medium-molecular-weight chitosan was indicated as a potentially new treatment with high compliance and effectiveness for patients. Optimization of the chitosan-based hydrogel preparation ensured the required rheological properties necessary for the release of the bioactive from the chitosan delivery system and demonstrated a satisfactory antimicrobial activity.
Marigold flower is a traditionally used plant material topically applied on the skin due to its anti-inflammatory properties and antibacterial activity. This potential of action justifies the implementation of marigold extract in nanofiber scaffolds based on poly-vinylpyrrolidone/hydroxypropyl-β-cyclodextrin (PVP/HPβCD) and polycaprolactone/polyvinylpyrrolidone (PCL/PVP) obtained by electrospinning for wound treatment. Using SEM, the morphology of electrospun scaffolds showed a fiber diameter in the range of 298–527 nm, with a uniform and bead-free appearance. ATR-FTIR spectroscopy confirmed the presence of marigold extracts in nanofibrous scaffolds. The composition of the nanofibers can control the release; in the case of PVP/HPβCD, immediate release of 80% of chlorogenic acid (an analytical and functional marker for marigold extract) was achieved within 30 min, while in the case of PCL/PVP, the controlled release was achieved within 24 h (70% of chlorogenic acid). All systems showed weak antibacterial activity against skin and wound-infecting bacteria Staphylococcus aureus (MIC 100 mg/mL), and Pseudomonas aeruginosa (MIC 200 mg/mL) and yeasts Candida albicans (MIC 100 mg/mL). Analysis of the effect of different scaffold compositions of the obtained electrofibers showed that those based on PCL/PVP had better wound healing potential. The scratch was closed after 36 h, compared to the 48 h required for PVP/HPβCD. Overall, the study shows that scaffolds of PCL/PVP nanofibers loaded with classic marigold extract have the best potential as wound dressing materials because of their ability to selectively modulate inflammation (via inhibition of hyaluronidase enzyme) and supportive antimicrobial properties, thereby aiding in the early stages of wound healing and repair.
The search for multifunctional wound dressings that combine structural integrity with biological activity remains an important challenge in modern biomedicine. In this study, electrospun chitosan/polyethylene oxide (CS/PEO) nanofibers incorporating Centella asiatica extract were developed and evaluated in vitro as potential wound-healing materials. Nanofibers were fabricated using various CS/PEO ratios, and the 1:2 w/w composition loaded with 1% extract was selected as the optimal formulation based on morphological homogeneity and processing efficiency. Comprehensive characterization demonstrated that the nanofiber matrix provided sustained release of asiaticosides over several days, fitting best with Hixson–Crowell and Higuchi kinetic models, suggesting a combined diffusion–erosion mechanism. Biological assays confirmed that the optimized formulation displayed strong antioxidant and anti-inflammatory activity, with synergistic effects observed between chitosan and C. asiatica. Moreover, chitosan contributed intrinsic antimicrobial properties against Staphylococcus aureus and Klebsiella pneumoniae, while the extract provided additional antioxidant and regenerative potential. Biocompatibility studies in human fibroblasts showed no cytotoxic effects, and scratch assays confirmed that extract-loaded nanofibers significantly accelerated wound closure compared to the control and CS/PEO base. Taken together, the results highlight the potential of CS/PEO nanofibers with C. asiatica extract as multifunctional wound dressings that integrate structural support, controlled release, antimicrobial protection, and regenerative bioactivity. Future work should address in vivo evaluation, scale-up of electrospinning, and potential incorporation of synergistic antimicrobial agents to further enhance clinical applicability. This approach underlines the value of combining natural product pharmacology with biopolymer engineering in the design of next-generation wound-healing biomaterials.