Naphthoquinones from Handroanthus impetiginosus promote skin wound healing through Sirt3 regulation

Document Type: Original Article

Authors

1 Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, 45320 Islamabad, Pakistan

2 College of Pharmacy, Gachon University, 191 Hambakmaero, Incheon, South Korea

3 Department of Biological Sciences, National University of Medical Sciences, C/O Military Hospital, Mall Road Rawalpindi, Pakistan

10.22038/ijbms.2020.43706.10275

Abstract

Objective(s): Lapachone is a natural naphthoquinone-derived compound found in Tabebuia avellanedae. It is well-known for its analgesic, anti-inflammatory, anti-microbial, diuretic, and anti-cancerous effects. However, the wound-healing effects of this compound are not known yet. The aim of this study was to investigate the wound healing activity of naphthoquinones (α-lapachone and β-lapachone) from Handroanthus impetiginosus.
Materials and Methods: Expression of Sirt3, migration-related proteins (Rac1, Cdc42, α-Pak) and angiogenesis-related protein of vascular endothelial growth factor (VEGF) was monitored using western blot analysis. Blood vessel formation and tissue development were monitored by angiogenesis assay and hematoxylin & eosin (H & E) staining, respectively on mouse skin tissue samples. Both α-lapachone and β-lapachone increased Sirt3 expression in vivo, but only β-lapachone increased Sirt3 expression in vitro.
Results: Both the compounds accelerated wound healing in cultured skin cells as well as mouse skin; however, β-lapachone was more effective at lower concentrations. Both of the compounds increased the expression of migration-related proteins both in vitro and in vivo. Similarly, α-lapachone and β-lapachone increased VEGF expression, tissue development and blood vessel formation in mouse skin.
Conclusion: These findings indicated that α-lapachone and β-lapachone are novel Sirt3 activators, and Sirt3 has a role in wound healing. Thus, Sirt3 and its regulators come out as a novel target and potential drug candidates, respectively in the important field of cutaneous wound healing.

Keywords


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