Adipose Tissue-Derived Mesenchymal Stem Cells (ADMSCs) and ADMSC-Derived Secretome Expedited Wound Healing in a Rodent Model – A Preliminary Study

作者：Hui Ma, Ping Kuen Lam, Wing Sum Siu, Cindy S.W. Tong, Kin Ki Yan Lo, Chi Man Koon, Xiao Xiao Wu, Xiang Li, Wen Cheng, Wai Ting Shum, Ping Chung Leung · 发表于：Clinical Cosmetic and Investigational Dermatology · 年份：2021 · DOI：10.2147/ccid.s298105 · 被引用次数：38 · 研究领域：Mesenchymal stem cell research、Wound Healing and Treatments、Diabetic Foot Ulcer Assessment and Management

INTRODUCTION: The biological role of mesenchymal stem cells (MSCs) in wound healing has been demonstrated. However, there were limited studies on the healing effect of secretome which consists of many biological factors secreted by MSCs. In this study, we aimed to compare the therapeutic effects of secretome with MSCs on facilitating wound healing. METHODS: Green fluorescent protein labelled adipose-derived MSCs (GFP-ADMSCs) or secretome was injected in the full-thickness skin excision model on SD rats. The wound healing process was evaluated by calculating the healing rate and the histological examinations on skin biopsy. The cell viability, proliferation and mobility of the rat dermal fibroblasts were compared after different treatments. The inflammatory response in macrophages was indicated by the level of nitric oxide (NO) and inflammatory cytokines through NO assay and ELISA. RESULTS: On day 5 and day 14, both MSCs and secretome accelerated the wound healing, secretome further enhanced the process. GFP-MSCs were detected 10 days after transplantation. The level of IL-6 and TNF-α in blood was reduced after MSCs and secretome treatments. The expressions of VEGF and PCNA were increased after treatment, higher intensity of VEGF was observed in secretome-injected tissue. The concentrations of total protein and VEGF in secretome were 2.2 ± 0.5 mg/mL and 882.0 ± 72.7 pg/mL, respectively. The cell viability and proliferation of FR were promoted significantly after the treatment....