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Asymmetric Wettable Composite Wound Dressing Prepared by Electrospinning with Bioinspired Micropatterning Enhances Diabetic Wound Healing
journal contribution
posted on 2020-08-05, 09:29 authored by Bangrui Yu, Chenhui He, Weibin Wang, Yafeng Ren, Jianmin Yang, Shaobin Guo, Yunquan Zheng, Xianai ShiWound
dressings with asymmetric wettability surfaces can effectively
prevent bacterial colonization and tissue dehydration and have shown
great potential for diabetic wound healing applications. However,
the construction of a highly hydrophobic outer surface with high biocompatibility
and permeability is still the major challenge in the preparation of
asymmetric wettable dressings. Inspired by the superhydrophobic surface
structures existing in nature, an asymmetric wettable composite wound
dressing with a highly hydrophobic outer layer was successfully prepared
for diabetic wound healing in this study. The hydrophobic outer layer
was fabricated by the electrospinning of poly(ε-caprolactone)
(PCL) on a micron-pore-size nylon mesh template, and the hydrophilic
inner layer was obtained by the electrospinning of pioglitazone-incorporated
gelatin (Gel-pio). The hydrophobic outer layer of the dressing with
a hierarchical micro–nanostructure exhibits excellent ability
to waterproof and prevent bacterial adhesion, whereas the hydrophilic
inner layer can promote cell proliferation, migration, and angiogenesis
by its nanofiber structure and biocompatible gelatin composition.
The presented dressing has good mechanical properties, permeability,
and high biocompatibility. More importantly, the results of full-thickness
skin wound model evaluation on db/db mice (type 2 diabetes) and STZ
rats (type 1 diabetes) indicate that the developed dressing can promote
wound healing by stimulating cell proliferation, angiogenesis, collagen
deposition, and re-epithelialization. The findings of this study suggest
that the bioinspired asymmetric wettable composite wound dressing
can be used as a promising candidate for diabetic wound healing.
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wound dressingbiocompatible gelatin compositionAsymmetric Wettable Composite Wound...wettablePCLsuperhydrophobic surface structurestype 2 diabetescell proliferationwound healingmicron-pore-size nylon mesh templateSTZtype 1 diabetesBioinspired Micropatterning Enhance...wound healing applicationsfull-thickness skin wound model eva...
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