Wound healing properties of green (using Lawsonia inermis leaf extract) and chemically synthesized ZnO nanoparticles in albino rats

Nov 25, 2021Environmental science and pollution research international

Wound healing effects of natural plant and lab-made zinc oxide nanoparticles in albino rats

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Abstract

The treated groups with zinc oxide nanoparticles (ZnO-NPs) gels showed a significant decrease in wound surface area percent (WSA%) and reduced healing time (p < 0.05).

Both green and chemical ZnO-NPs demonstrated good crystallinity and high purity.
Green ZnO-NPs had longer nanowire length and diameter compared to chemical ZnO-NPs.
Wound contraction percent (WC%) was increased in groups treated with ZnO-NP gels.
Histological examination revealed a significantly higher epithelialization score at 21 days post-treatment in treated groups compared to the control group (p < 0.05).
Scores for vasculature, necrosis, connective tissue formation, and collagen synthesis were mostly similar across groups.

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Wound healing is one of the utmost medical issues in human and veterinary medicine, which explains the urgent need for developing new agents that possess wound healing activities. The present study aimed to assess the effectiveness of green and chemical zinc oxide nanoparticles (ZnO-NPs) for wound healing. ZnO-NPs (green using Lawsonia inermis leaf extract and chemical) were synthesized and characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and high-resolution transmission electron microscopy (HRTEM). The gels containing the nanomaterials were prepared and inspected. Forty-five albino rats were divided into three groups, the control group was treated with normal saline 0.9%, and the other two groups were treated with gels containing green or chemical ZnO-NPs, respectively. On the 3, 7, 14, and 21days post-treatment (PT), the wounds were clinicopathologically examined. Both nanomaterials have good crystallinity and high purity, but green ZnO-NPs have a longer nanowire length and diameter than chemical ZnO-NPs. The formed gels were highly viscous with a pH of 6.5 to 7. The treated groups with ZnO-NP gels showed clinical improvement, as decreased wound surface area (WSA) percent (WSA%), increased wound contraction percent (WC%), and reduced healing time (p < 0.05) when compared with the control group. The histological scoring showed that the epithelialization score was significantly higher at the 21day post-treatment in the treated groups than in the control group (p < 0.05), but the vasculature, necrosis, connective tissue formation, and collagen synthesis scores were mostly similar. The green and chemical ZnO-NP gels showed promising wound healing properties; however, the L. inermis-mediated ZnO-NPs were more effective. rd th th st st

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Wound healing properties of green (using Lawsonia inermis leaf extract) and chemically synthesized ZnO nanoparticles in albino rats

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