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Objective: In early gestation, fetal wounds heal without fibrosis in a process resembling regeneration. Elucidating this remarkable mechanism can result in tremendous benefits to prevent scarring. Fetal mouse cutaneous wounds before embryonic day (E)18 heal without scar. Herein, we analyze expression profiles of fetal and postnatal wounds utilizing updated gene annotations and pathway analysis to further delineate between repair and regeneration. Approach: Dorsal wounds from time-dated pregnant BALB/c mouse fetuses and adult mice at various time points were collected. Total RNA was isolated and microarray analysis was performed using chips with 42,000 genes. Significance analysis of microarrays was utilized to select genes with &gt;2-fold expression differences with a false discovery rate of &lt;2. Enrichment analysis was performed on significant genes to identify differentially expressed pathways. Results: Our analysis identified 471 differentially expressed genes in fetal versus adult wounds following injury. Utilizing enrichment analysis of significant genes, we identified the top 20 signaling pathways that were upregulated and downregulated at 1 and 12 h after injury. At 24 h after injury, we discovered 18 signaling pathways upregulated in adult wounds and 11 pathways upregulated in fetal wounds. Innovation: These novel target genes and pathways may reveal repair mechanisms of the early fetus that promote regeneration over fibrosis. Conclusion: Our microarray analysis recognizes hundreds of possible genes as candidates for regulators of scarless versus scarring wound repair. Enrichment analysis reveals 109 signaling pathways related to fetal scarless wound healing.

advances in wound care

Pathway Analysis of Gene Expression in Murine Fetal and Adult Wounds<i>This abstract has been presented at the 8th Annual Academic Surgical Congress on February 5–7, 2013 in New Orleans, Louisiana and the 26th Annual Meeting of the Wound Healing Society on April 23–27, 2014 in Orlando, Florida.</i>

Pathway Analysis of Gene Expression in Murine Fetal and Adult WoundsThis abstract has been presented at the 8th Annual Academic Surgical Congress on February 5–7, 2013 in New Orleans, Louisiana and the 26th Annual Meeting of the Wound Healing Society on April 23–27, 2014 in Orlando, Florida.