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• W2563249908 abstract "Abstract Blood supply is the most important factor determining the survival of a skin flap. Botulinum toxin‐A (Botox‐A) is used as pharmacologic agent not only for aesthetic purposes, but also for its vasomotor actions. This study was conducted to establish whether local application of Botox‐A increased survival of random pattern skin flaps in rats by changing the expression of neurotransmitters. Forty adult Sprague–Dawley rats with a caudally‐based random pattern skin flap were divided into two groups: Botox‐A group and saline group. Surviving flap area and cutaneous blood flow in the flap were evaluated on postoperative days 3 and 7. After injection of Botox‐A, changes in vessels were analyzed using immunohistochemical staining. Levels of norepinephrine, neuropeptide‐Y, nitric oxide, and endothelial nitric oxide synthase were analyzed quantitatively by high performance liquid chromatography, Western blot, and colorimetric assay. The survived area in the Botox‐A group was significantly higher than that in the control group on postoperative days 3 and 7. Blood flow in the Botox‐A group was significantly high in the proximal and middle areas immediately after the operation. The number of CD31‐positive vessels in the Botox‐A group was significant greater than that in the control group. Norepinephrine level in the Botox‐A group decreased significantly immediately after flap elevation and at postoperative day 3. There were no significant differences in neuropeptide‐Y level between the two groups. Nitric oxide level did not change significantly in either group despite the increase in endothelial nitric oxide synthase immediately after flap elevation and at 3 days postoperatively. In conclusion, Botox‐A increased vascular blood flow and viable flap area in rats by reducing norepinephrine level. In contrast, neuropeptide‐Y, another vasoconstrictor, was not affected by Botox‐A. Nitric oxide, a vasodilator, was also not affected by Botox‐A, despite the significant increase in endothelial nitric oxide synthase expression in the flaps." @default.
• W2563249908 created "2017-01-06" @default.
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• W2563249908 date "2017-01-01" @default.
• W2563249908 modified "2023-10-16" @default.
• W2563249908 title "Effect of botulinum toxin A on vasoconstriction and sympathetic neurotransmitters in a murine random pattern skin flap model" @default.
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• W2563249908 doi "https://doi.org/10.1111/wrr.12501" @default.
• W2563249908 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27997734" @default.
• W2563249908 hasPublicationYear "2017" @default.
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