Inês Correia-Sá1, Anita Paiva2, Cláudia M Carvalho2, Maria A Vieira-Coelho2. 1. Department of Plastic, Reconstructive and Aesthetic Surgery and Burn Unit, Faculty of Medicine, University of Porto and Centro Hospitalar Universitário de São João, EPE, Al. Prof. Hernâni Monteiro, 4200-319 Porto, Portugal; Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Porto, Porto, Portugal. Electronic address: inescsa@gmail.com. 2. Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Porto, Porto, Portugal.
Abstract
INTRODUCTION: Recently, the endocannabinoid system has been identified in skin and it has been linked with the formation of skin fibrosis and wound healing. We aimed to find and analyse reported data on compounds acting in the endocannabinoid system with significant effect in skin fibrosis. METHODS: A literature search on PUBMED was conducted for studies published in English until February 2020 on cannabinoids and skin fibrosis. The initial search was performed with terms: "cannabinoid" AND "skin". This search retrieved 296 publications from which 18 directly related to skin fibrosis or wound healing process were included in this review. RESULTS: CB1 receptor inactivation and CB2 receptor activation show anti-fibrotic effects on cellular and animal experimental models of cutaneous fibrosis. CB2 receptor activation also promotes re-epithelization. Other cannabinoid related receptors, like adenosine A2A receptors and PPAR-γ, are also involved. Their activation lead to a pro-fibrotic and anti-fibrotic effect, respectively. CONCLUSION: Several molecular drug targets for endocannabinoid system were identified in skin. It may be a promising approach for the treatment of excessive skin fibrosis disorders.
INTRODUCTION: Recently, the endocannabinoid system has been identified in skin and it has been linked with the formation of skin fibrosis and wound healing. We aimed to find and analyse reported data on compounds acting in the endocannabinoid system with significant effect in skin fibrosis. METHODS: A literature search on PUBMED was conducted for studies published in English until February 2020 on cannabinoids and skin fibrosis. The initial search was performed with terms: "cannabinoid" AND "skin". This search retrieved 296 publications from which 18 directly related to skin fibrosis or wound healing process were included in this review. RESULTS: CB1 receptor inactivation and CB2 receptor activation show anti-fibrotic effects on cellular and animal experimental models of cutaneous fibrosis. CB2 receptor activation also promotes re-epithelization. Other cannabinoid related receptors, like adenosine A2A receptors and PPAR-γ, are also involved. Their activation lead to a pro-fibrotic and anti-fibrotic effect, respectively. CONCLUSION: Several molecular drug targets for endocannabinoid system were identified in skin. It may be a promising approach for the treatment of excessive skin fibrosis disorders.