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. 2022 Dec 6;8(12):e12063.
doi: 10.1016/j.heliyon.2022.e12063. eCollection 2022 Dec.

Evaluation of poly(N-isopropylacrylamide)/tetraphenylethylene/amphotericin B-based visualized antimicrobial nanofiber wound dressing for whole skin wound healing in rats

Xinhui Zhai  1   2 , Zongyao Cui  3 , Yali Li  1   2 , Shuang Hou  1   2 , Weiyang Shen  1   2
Affiliations

Evaluation of poly(N-isopropylacrylamide)/tetraphenylethylene/amphotericin B-based visualized antimicrobial nanofiber wound dressing for whole skin wound healing in rats

Xinhui Zhai et al. Heliyon. .

Abstract

The aim of this work is to develop a novel nanofiber wound dressing with multiple functional properties that combines suitable mechanical properties, slow and controlled drug release, antifungal activity, and visual drug monitoring to accelerate wound healing while reducing systemic circulation of the drug, achieving reduced dose and side effects, and achieving patient satisfaction and compliance. In this paper, visualized nanofiber films were prepared using electrostatic spinning technology. This nanofiber wound dressing has soft tissue-like mechanical and antifungal properties and is biocompatible. In particular, the poly(N-isopropylacrylamide) (PNIPAAm)/tetraphenylethylene (TPE)/amphotericin B (AMB) nanofiber films showed good performance in terms of antifungal activity and cytocompatibility compared with medical gauze, and significantly accelerated the wound healing process in a mouse total wound defect model with PCL+PVP+TPE+AMB+PNIPAAm. The wound healing rate of nanofibrous membrane group was 100% at 14 days. In addition, histological analysis, collagen deposition and immunohistochemistry showed, for example, fewer inflammatory cells, more fibroblasts around the damaged area, increased wound epithelial atrophy, reduced granulation tissue, connective tissue reconstruction, epithelial tissue formation, and abundant small angiogenesis in the dermis near the epidermis; a higher level of collagen deposition fraction of 49.97%; and a simultaneous reduction in HIF-1α production and upregulated the expression of CD31. In conclusion, this antifungal nanofiber film showed promising applications throughout the skin wound healing process.

Keywords: Electrostatic spinning nanofiber membrane; Hydrogel; Local antibiotic delivery; Visualization; Wound dressings.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Nanofiber membrane TPE and AMB FL curve.
Figure 2
Figure 2
SEM image of PVP+PCL+AMB+TPE+PNIPAAm nanofiber membrane.
Figure 3
Figure 3
PVP+PCL+AMB+TPE+PNIPAAm nanofiber membrane WCTA plot (a) 0s. (b) 78s.
Figure 4
Figure 4
FT-IR map of nanofiber membrane.
Figure 5
Figure 5
(a) Plot of cumulative drug release. (b) Plot of AMB drug release versus fluorescence intensity.
Figure 6
Figure 6
(a) MTT of nanofiber membrane. (b) blood compatibility graph of nanofiber membrane.
Figure 7
Figure 7
Effect of antifungal properties of nanofiber membrane under different temperature and pH conditions (a) 25 °C, pH = 7.4, 48h. (b) 25 °C, pH = 7.4, 24h. (c) 37 °C, pH = 7.4, 48h. (d) 37 °C, pH = 6.5, 48h.
Figure 8
Figure 8
Wound healing rate.
Figure 9
Figure 9
Collagen volume fraction CVF (%).
Figure 10
Figure 10
HIF-1α Average optical density (Mean Density).
Figure 11
Figure 11
Number of blood vessels per unit area of CD31 MVD (PCs./mm) 2).
See this image and copyright information in PMC

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