Polyphenol-Conjugated Bimetallic Au@AgNPs for Improved Wound Healing

• Main Authors: Orlowski P, Zmigrodzka M, Tomaszewska E, Ranoszek-Soliwoda K, Pajak B, Slonska A, Cymerys J, Celichowski G, Grobelny J, Krzyzowska M
• Format: Article
• Language: English
• Published: Dove Medical Press 2020-07-01
• Series: International Journal of Nanomedicine
• Subjects: polyphenols; bimetallic nanoparticles; wound healing; mouse model
• Online Access: https://www.dovepress.com/polyphenol-conjugated-bimetallic-auagnps-for-improved-wound-healing-peer-reviewed-article-IJN

Piotr Orlowski,1 Magdalena Zmigrodzka,2 Emilia Tomaszewska,3 Katarzyna Ranoszek-Soliwoda,3 Beata Pajak,4 Anna Slonska,5 Joanna Cymerys,5 Grzegorz Celichowski,3 Jaroslaw Grobelny,3 Malgorzata Krzyzowska1 1Laboratory of Nanobiology and Biomaterials, Military Institute of Hygiene and Epidemiology, Warsaw, Poland; 2Department of Pathology and Veterinary Diagnostics, Institute of Veterinary Medicine, Warsaw University of Life Sciences (WULS-SGGW), Warsaw, Poland; 3Department of Materials Technology and Chemistry, Faculty of Chemistry, University of Lodz, Lodz, Poland; 4Laboratory of Genetics and Molecular Biology, Military Institute of Hygiene and Epidemiology, Warsaw, Poland; 5Division of Microbiology, Department of Preclinical Sciences, Institute of Veterinary Medicine, Warsaw University of Life Sciences, Warsaw 02-786, PolandCorrespondence: Malgorzata Krzyzowska Email [e-mail]: Polyphenols possess antioxidant, anti-inflammatory and antimicrobial properties and have been used in the treatment of skin wounds and burns. We previously showed that tannic acid-modified AgNPs sized > 26 nm promote wound healing, while tannic acid-modified AgNPs sized 13 nm can elicit strong local inflammatory response. In this study, we tested bimetallic Au@AgNPs sized 30 nm modified with selected flavonoid and non-flavonoid compounds for wound healing applications.Methods: Bimetallic Au@AgNPs were obtained by growing an Ag layer on AuNPs and further modified with selected polyphenols. After toxicity tests and in vitro scratch assay in HaCaT cells, modified lymph node assay as well as the mouse splint wound model were further used to access the wound healing potential of selected non-toxic modifications.Results: Tannic acid, gallic acid, polydatin, resveratrol, catechin, epicatechin, epigallocatechin, epicatechin gallate, epigallocatechin gallate and procyanidin B2 used to modify Au@AgNPs exhibited good toxicological profiles in HaCaT cells. Au@AgNPs modified with 15 μM tannic acid, 200 μM resveratrol, 200 μM epicatechin gallate, 1000 μM gallic acid and 200 μM procyanidin B2 induced wound healing in vivo and did not lead to the local irritation or inflammation. Tannic acid-modified Au@AgNPs induced epithelial-to-mesenchymal transition (EMT) – like re-epithelialization, while other polyphenol modifications of Au@AgNPs acted through proliferation and wound closure.Conclusion: Bimetallic Au@AgNPs can be used as a basis for modification with selected polyphenols for topical uses. In addition, we have demonstrated that particular polyphenols used to modify bimetallic nanoparticles may show different effects upon different stages of wound healing.Keywords: polyphenols, bimetallic nanoparticles, wound healing, mouse model