Bio-ink Skin Patches with Olive Extracts for Better Wound Healing

David Palenski
11th January, 2024

Bio-ink Skin Patches with Olive Extracts for Better Wound Healing

From study, (a) is the 3D printer setting for the model, and (b) a live 3D printed film of the patch.

Image adapted from: Patitucci et al. / CC BY (Source)
Wound healing is a fundamental biological process, yet often results in scar tissue rather than complete regeneration[2]. This is particularly problematic in chronic wounds, like those experienced by diabetic patients, where infection and slow healing can lead to serious complications, even amputation[3]. Current wound dressings aren’t always ideal, failing to adequately address the diverse needs of different wounds and patients. Researchers at the University of Calabria have been working on a new approach: a customized, 3D-printed patch designed to actively promote healing[1]. The core of this new patch lies in its materials. It’s created using alginate and pectin – both naturally derived polymers – combined to form a printable ‘ink’. The ratio of these polymers is crucial for achieving the right consistency for 3D printing. But the key innovation is the addition of Olive Leaf Extract (OLE). OLE is rich in polyphenols, compounds known for their antioxidant and anti-inflammatory properties. The resulting film contained a significant amount of these polyphenols, specifically 13.15 mg CAE/g. Antioxidants are important because wounds generate damaging molecules called free radicals, which can hinder the healing process. The patch demonstrated a strong ability to neutralize these free radicals, effectively scavenging DPPH, ABTS, and NO radicals. This was measured using IC50 values – a lower value indicates a more potent antioxidant effect. The patch’s IC50 values were 0.66, 0.47, and 2.02 mg/mL for these respective radicals, demonstrating significant antioxidant capacity. Inflammation is a natural part of wound healing, but excessive or prolonged inflammation can delay recovery[4]. The anti-inflammatory properties of OLE help to regulate this process. To understand how the patch would function, researchers conducted release studies. These showed that the polyphenols were almost completely released from the patch within 48 hours, delivering a sustained dose to the wound area. This controlled release is important for maximizing the therapeutic effect. The patch was also tested on cells in a laboratory setting, specifically BJ fibroblast cells, which play a vital role in wound repair. The results showed that the patch enhanced cell movement (motility) and increased the production of collagen I – a key protein in scar formation, but also essential for rebuilding tissue[5]. Effective wound healing requires a balance of moisture. Too dry, and cells can’t migrate and proliferate; too wet, and it creates a breeding ground for bacteria[3]. The 3D-printed patch was designed to absorb excess fluid (exudate) while maintaining an optimal moisture level. Furthermore, the patch proved to be biocompatible, meaning it doesn’t cause a harmful reaction when in contact with biological tissues. The increasing prevalence of antibiotic-resistant bacteria poses a significant challenge to wound care[3]. While this study doesn’t directly address antibiotic resistance, the anti-inflammatory and antioxidant properties of OLE, combined with the patch’s ability to create an optimal healing environment, could potentially reduce the risk of infection and the need for antibiotics. The development of this patch represents a step towards personalized wound care, offering the potential to tailor treatments to individual patient needs.

MedicineBiotechPlant Science

References

Main Study

1) 3D-Printed Alginate/Pectin-Based Patches Loaded with Olive Leaf Extracts for Wound Healing Applications: Development, Characterization and In Vitro Evaluation of Biological Properties.

Published 11th January, 2024

https://doi.org/10.3390/pharmaceutics16010099

Related Studies

2) Wound repair and regeneration.

https://doi.org/10.1038/nature07039

3) Antimicrobial Silver Nanoparticles for Wound Healing Application: Progress and Future Trends.

https://doi.org/10.3390/ma12162540

4) Wound healing in the 21st century.

https://doi.org/10.1016/j.jaad.2009.10.048

5) Tissue repair and the dynamics of the extracellular matrix.

Journal: The international journal of biochemistry & cell biology, Issue: Vol 36, Issue 6, Jun 2004


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