Abstract:Curcumin, a spice found in turmeric, is widely used in alternative medicine for its purported anti-inflammatory and antioxidant activities. The goal of this study was to test the curcumin efficacy on rabbit ear wounds under nonischemic, ischemic, and ischemia-reperfusion conditions. Previously described models were utilized in 58 New Zealand White rabbits. Immediately before wounding, rabbits were given intravenous crude or pure curcumin (6 μg/kg, 30 μg/kg, or 60 μg/kg) dissolved in 1% ethanol. Specimens were … Show more
“…) indicated that the initial migration of cells was faster in the HC and LC groups than in the blank and control groups. This might be a consequence of the constant release of curcumin in the HC and LC groups, in agreement with published observations that curcumin considerably improves granulation in non‐ischemic wounds …”
Section: Discussionsupporting
confidence: 92%
“…This might be a consequence of the constant release of curcumin in the HC and LC groups, in agreement with published observations that curcumin considerably improves granulation in non-ischemic wounds. 60 A series of important events takes place at the edge of the wound, accompanying granulation. Epidermal cells in the direct vicinity of the edge of the wound begin to thicken within the first 24-48 h post injury.…”
“…) indicated that the initial migration of cells was faster in the HC and LC groups than in the blank and control groups. This might be a consequence of the constant release of curcumin in the HC and LC groups, in agreement with published observations that curcumin considerably improves granulation in non‐ischemic wounds …”
Section: Discussionsupporting
confidence: 92%
“…This might be a consequence of the constant release of curcumin in the HC and LC groups, in agreement with published observations that curcumin considerably improves granulation in non-ischemic wounds. 60 A series of important events takes place at the edge of the wound, accompanying granulation. Epidermal cells in the direct vicinity of the edge of the wound begin to thicken within the first 24-48 h post injury.…”
“…33 Briefly, 4 or 6 full-thickness dermal punches 7 mm in diameter were made on the ventral surface of the ear down to but not including the perichondrium. The cartilage was scored around the circumference of the wound to allow for histomorphometric analysis.…”
Section: Methodsmentioning
confidence: 99%
“…Several histomorphometric measurements were determined using a digital image analysis system (NIS-Elements Basic Research, Nikon Corporation, Kanagawa, Japan) at 2× and 10× magnification as previously described. 33 Each parameter was measured in a blind manner. Scar elevation index (SEI) was calculated to quantify the extent of hypertrophic scarring in the scarring model.…”
Background:We previously showed that intradermal injection of statins is a successful treatment for hypertrophic scarring. Topical application has many advantages over intradermal injection. In this study, we demonstrate the efficacy of topical statin treatment in reducing scar in our validated rabbit ear scar model.Methods:Twenty New Zealand White rabbits were divided into 2 study groups, with 6 rabbits receiving 10 μm pravastatin intradermally at postoperative days 15, 18, and 21, and 14 rabbits receiving 0.4%, 2%, and 10% simvastatin topical application at postoperative days 14–25. Four or 6 full-thickness circular dermal punches 7 mm in diameter were made on the ventral surface of the ear down to but not including the perichondrium. Specimens were collected at 28 days to evaluate the effects of statins on hypertrophic scarring.Results:Treatment with pravastatin intradermal administration significantly reduced scarring in terms of scar elevation index. Topical treatment with both medium- and high-dose simvastatin also significantly reduced scarring. High-dose simvastatin topical treatment showed a major effect in scar reduction but induced side effects of scaling, erythema, and epidermal hyperplasia, which were improved with coapplication of cholesterol. There is a dose response in scar reduction with low-, medium- and high-dose simvastatin topical treatment. High-dose simvastatin treatment significantly reduced the messenger ribonucleic acid (mRNA) expression of connective tissue growth factor, consistent with our previously published work on intradermally injected statins. More directly, high-dose simvastatin treatment also significantly reduced the mRNA expression of collagen 1A1.Conclusions:Topical simvastatin significantly reduces scar formation. The mechanism of efficacy for statin treatment through interference with connective tissue growth factor mRNA expression was confirmed.
“…Curcumin was found to suppress TGF-β1/SMAD pathway and extra cellular matrix (ECM) production in primary keloid fibroblasts and reduce pro-inflammatory cytokines, interleukins (IL-1β, IL-6, and IL-8), which directly decrease hypertrophic scarring [20]. …”
Scars are a natural and unavoidable result from most wound repair procedures and the body’s physiological healing response. However, they scars can cause considerable functional impairment and emotional and social distress. There are different forms of treatments that have been adopted to manage or eliminate scar formation. This review covers the latest research in the past decade on using either natural agents or synthetic biomaterials in treatments for scar reduction.
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