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Clinical Potential of a Silk Sericin-Releasing Bioactive Wound Dressing for the Treatment of Split-Thickness Skin Graft Donor Sites

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ABSTRACT

Purpose

An ethyl alcohol-precipitated silk sericin/PVA scaffold that controlled the release of silk sericin was previously developed and applied for the treatment of full-thickness wounds in rats and demonstrated efficient healing. In this study, we aimed to further evaluate the clinical potential of this scaffold, hereafter called “silk sericin-releasing wound dressing”, for the treatment of split-thickness skin graft donor sites by comparison with the clinically available wound dressing known as “Bactigras®”.

Methods

In vitro characterization and in vivo evaluation for safety of the wound dressings were performed. A clinical trial of the wound dressings was conducted according to standard protocols.

Results

The sericin released from the wound dressing was not toxic to HaCat human keratinocytes. A peel test indicated that the silk sericin-releasing wound dressing was less adhesive than Bactigras®, potentially reducing trauma and the risk of repeated injury upon removal. There was no evidence of skin irritation upon treatment with either wound dressing. When tested in patients with split-thickness skin graft donor sites, the wounds treated with the silk sericin-releasing wound dressing exhibited complete healing at 12 ± 5.0 days, whereas those treated with Bactigras® were completely healed at 14 ± 5.2 days (p = 1.99 × 10−4). In addition, treatment with the silk sericin-releasing wound dressing significantly reduced pain compared with Bactigras® particularly during the first 4 postoperative days (p = 2.70 × 10−5 on day 1).

Conclusion

We introduce this novel silk sericin-releasing wound dressing as an alternative treatment for split-thickness skin graft donor sites.

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ACKNOWLEDGMENTS AND DISCLOSURES

We gratefully acknowledge the financial support from the Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program (Grant No. PHD/0115/2551) to Tippawan Siritientong and Pornanong Aramwit and also the support from the National Research Council of Thailand.

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Authors and Affiliations

  1. Bioactive Resources for Innovative Clinical Applications Research Unit, Chulalongkorn University, Bangkok, Thailand

    Tippawan Siritientong & Pornanong Aramwit

  2. Department of Pharmacy Practice, Faculty of Pharmaceutical Sciences, Chulalongkorn University,, PhayaThai Road Phatumwan, Bangkok, 10330, Thailand

    Tippawan Siritientong & Pornanong Aramwit

  3. Division of Plastic and Reconstructive Surgery, Department of Surgery Faculty of Medicine, Chulalongkorn University, PhayaThai Road, Phatumwan, Bangkok, 10330, Thailand

    Apichai Angspatt

  4. Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, PhayaThai Road Phatumwan, Bangkok, 10330, Thailand

    Juthamas Ratanavaraporn

Authors
  1. Tippawan Siritientong
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  2. Apichai Angspatt
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  3. Juthamas Ratanavaraporn
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  4. Pornanong Aramwit
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Corresponding author

Correspondence to Pornanong Aramwit.

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Figure S1

(A) Percentage of migrated L929 mouse fibroblast cells after the monolayer was scratched and cultured in the presence of the wound dressings for and 72 h (■). * p < 0.05 when compared to the control (cells cultured on a polystyrene plate without sample) was considered significant. (B) Phase-contrast microscopic images of L929 cells after the monolayer were scratched (t0) and cultured in the presence of the wound dressings for 24, 48, and 72 h, respectively. (JPEG 83.6 kb)

High Resolution image (TIFF 15.2 mb)

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Siritientong, T., Angspatt, A., Ratanavaraporn, J. et al. Clinical Potential of a Silk Sericin-Releasing Bioactive Wound Dressing for the Treatment of Split-Thickness Skin Graft Donor Sites. Pharm Res 31, 104–116 (2014). https://doi.org/10.1007/s11095-013-1136-y

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  • DOI: https://doi.org/10.1007/s11095-013-1136-y

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