miR-29b promotes skin wound healing and reduces excessive scar formation by inhibition of the TGF-β1/Smad/CTGF signaling pathway

2017 ◽  
Vol 95 (4) ◽  
pp. 437-442 ◽  
Author(s):  
Jingdong Guo ◽  
Quan Lin ◽  
Ying Shao ◽  
Li Rong ◽  
Duo Zhang
Keyword(s):  
Wound Healing ◽  
Signaling Pathway ◽  
Inhibitory Effect ◽  
Negative Control ◽  
Skin Wound ◽  
Scar Formation ◽  
Skin Wound Healing ◽  
Morphologic Alteration ◽  
Great Pain ◽  
Tgf Β1

The hypertrophic scar is a medical difficulty of humans, which has caused great pain to patients. Here, we investigated the inhibitory effect of miR-29b on scar formation. The scalded model was established in mice and miR-29b mimics or a negative control was subcutaneously injected into the injury skin. Then various molecular biological experiments were performed to assess the effect of miR-29b on scar formation. According to our present study, first, the results demonstrated that miR-29b was down-regulated in thermal injury tissue and miR-29b treatment could promote wound healing, inhibit scar formation, and alleviate histopathological morphologic alteration in scald tissues. Additionally, miR-29b treatment suppressed collagen deposition and fibrotic gene expression in scar tissues. Finally, we found that miR-29b treatment inhibited the TGF-β1/Smad/CTGF signaling pathway. Taken together, our data suggest that miR-29b treatment has an inhibitory effect against scar formation via inhibition of the TGF-β1/Smad/CTGF signaling pathway and may provide a potential molecular basis for future treatments for hypertrophic scars.

scholarly journals Epidermal stem cell-derived exosomes promote skin regeneration by downregulating transforming growth factor-β1 in wound healing

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Mengna Duan ◽  
Yan Zhang ◽  
Haiyang Zhang ◽  
Yupeng Meng ◽  
Ming Qian ◽  
...  
Keyword(s):  
Wound Healing ◽  
Growth Factor ◽  
Clinical Setting ◽  
Transforming Growth Factor ◽  
Transforming Growth Factor Β1 ◽  
Skin Wound ◽  
Scar Formation ◽  
Dermal Fibroblasts ◽  
Skin Wound Healing ◽  
Tgf Β1

Abstract Background Scar formation, which may be caused by myofibroblast aggregations, is the greatest challenge during skin wound healing in the clinical setting. Studies have indicated that epidermal stem cells (EPSC) improve wound healing and reduce scar formation. Methods We investigated the therapeutic effects of EPSC-derived exosomes (EPSC-Exos) on skin wound healing in a skin-defect rat model. We also examined the roles of EPSC-Exos-specific microRNAs in inhibiting the differentiation of human dermal fibroblasts (HDF) into myofibroblasts. Results We found that EPSC-Exos increased the wound healing rate and reduced scar formation in rats. Also, EPSC-Exos improved the regeneration levels of skin appendages, nerves and vessels, as well as the natural distribution of collagen. Furthermore, we found these functions may be achieved by inhibiting the activity of transforming growth factor-β1 (TGF-β1) and its downstream genes. The results showed that some specific microRNAs, including miR-16, let-7a, miR-425-5p and miR-142-3p, were enriched in EPSC-Exos. EPSC-Exos-specific microRNAs, especially miR-425-5p and miR-142-3p, played vital roles in inhibiting myofibroblast differentiation via reducing the TGF-β1 expression in dermal fibroblasts. Conclusion We found a novel function of EPSC-Exos-specific microRNAs, suggesting that EPSC-Exos might represent a strategy to prevent scar formation during wound healing in the clinical setting.

scholarly journals Resveratrol-loaded peptide-hydrogels inhibit scar formation in wound healing through suppressing inflammation

2019 ◽  
Author(s):  
Chen-Chen Zhao ◽  
Lian Zhu ◽  
Zheng Wu ◽  
Rui Yang ◽  
Na Xu ◽  
...  
Keyword(s):  
Wound Healing ◽  
Damage Model ◽  
Skin Wound ◽  
Scar Formation ◽  
Wound Dressings ◽  
Skin Damage ◽  
Skin Wound Healing ◽  
Accelerate Wound Healing ◽  
Peptide Hydrogels

Abstract Scar formation seriously affects the repair of damaged skin especially in adults and the excessive inflammation has been considered as the reason. The self-assembled peptide-hydrogels are ideal biomaterials for skin wound healing due to their similar nanostructure to natural extracellular matrix, hydration environment and serving as drug delivery systems. In our study, resveratrol, a polyphenol compound with anti-inflammatory effect, is loaded into peptide-hydrogel (Fmoc-FFGGRGD) to form a wound dressing (Pep/RES). Resveratrol is slowly released from the hydrogel in situ, and the release amount is controlled by the loading amount. The in vitro cell experiments demonstrate that the Pep/RES has no cytotoxicity and can inhibit the production of pro-inflammatory cytokines of macrophages. The Pep/RES hydrogels are used as wound dressings in rat skin damage model. The results suggest that the Pep/RES dressing can accelerate wound healing rate, exhibit well-organized collagen deposition, reduce inflammation and eventually prevent scar formation. The Pep/RES hydrogels supply a potential product to develop new skin wound dressings for the therapy of skin damage.

Acemannan accelerates cell proliferation and skin wound healing through AKT/mTOR signaling pathway

2015 ◽  
Vol 79 (2) ◽  
pp. 101-109 ◽  
Author(s):  
Wei Xing ◽  
Wei Guo ◽  
Cun-Hua Zou ◽  
Ting-Ting Fu ◽  
Xiang-Yun Li ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Wound Healing ◽  
Signaling Pathway ◽  
Skin Wound ◽  
Mtor Signaling ◽  
Mtor Signaling Pathway ◽  
Skin Wound Healing

Quercetin promotes human epidermal stem cell proliferation through the estrogen receptor/β-catenin/c-Myc/cyclin A2 signaling pathway

2020 ◽  
Vol 52 (10) ◽  
pp. 1102-1110
Author(s):  
Zhaodong Wang ◽  
Guangliang Zhang ◽  
Yingying Le ◽  
Jihui Ju ◽  
Ping Zhang ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Cell Proliferation ◽  
Wound Healing ◽  
Estrogen Receptor ◽  
Signaling Pathway ◽  
Skin Wound ◽  
Skin Tissue ◽  
Skin Wound Healing ◽  
Skin Tissue Engineering ◽  
Cyclin A2

Abstract Skin epidermal stem cells (EpSCs) play an important role in wound healing. Quercetin is a phytoestrogen reported to accelerate skin wound healing, but its effect on EpSCs is unknown. In this study, we investigated the effect of quercetin on human EpSC proliferation and explored the underlying mechanisms. We found that quercetin at 0.1~1 μM significantly promoted EpSC proliferation and increased the number of cells in S phase. The pro-proliferative effect of quercetin on EpSCs was confirmed in cultured human skin tissue. Mechanistic studies showed that quercetin significantly upregulated the expressions of β-catenin, c-Myc, and cyclins A2 and E1. Inhibitor for β-catenin or c-Myc significantly inhibited quercetin-induced EpSC proliferation. The β-catenin inhibitor XAV-939 suppressed quercetin-induced expressions of β-catenin, c-Myc, and cyclins A2 and E1. The c-Myc inhibitor 10058-F4 inhibited the upregulation of c-Myc and cyclin A2 by quercetin. Pretreatment of EpSCs with estrogen receptor (ER) antagonist ICI182780, but not the G protein-coupled ER1 antagonist G15, reversed quercetin-induced cell proliferation and upregulation of β-catenin, c-Myc, and cyclin A2. Collectively, these results indicate that quercetin promotes EpSC proliferation through ER-mediated activation of β-catenin/c-Myc/cyclinA2 signaling pathway and ER-independent upregulation of cyclin E1 and that quercetin may accelerate skin wound healing through promoting EpSC proliferation. As EpSCs are used not only in clinic to treat skin wounds but also as seed cells in skin tissue engineering, quercetin is a useful reagent to expand EpSCs for basic research, skin wound treatment, and skin tissue engineering.

scholarly journals Role of periostin in skin wound healing and pathologic scar formation

2020 ◽  
Vol 133 (18) ◽  
pp. 2236-2238
Author(s):  
Shi-Lu Yin ◽  
Ze-Lian Qin ◽  
Xin Yang
Keyword(s):  
Wound Healing ◽  
Skin Wound ◽  
Scar Formation ◽  
Skin Wound Healing

scholarly journals Phytochemical Composition, Antioxidant Activity, and the Effect of the Aqueous Extract of Coffee (Coffea arabica L.) Bean Residual Press Cake on the Skin Wound Healing

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Regina Celis Lopes Affonso ◽  
Ana Paula Lorenzen Voytena ◽  
Simone Fanan ◽  
Heloísa Pitz ◽  
Daniela Sousa Coelho ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Wound Healing ◽  
Press Cake ◽  
Negative Control ◽  
Skin Wound ◽  
Coffee Bean ◽  
Skin Wound Healing ◽  
Wound Area ◽  
Inflammatory Phase ◽  
Coffee Beans

The world coffee consumption has been growing for its appreciated taste and its beneficial effects on health. The residual biomass of coffee, originated in the food industry after oil extraction from coffee beans, called coffee beans residual press cake, has attracted interest as a source of compounds with antioxidant activity. This study investigated the chemical composition of aqueous extracts of coffee beans residual press cake (AE), their antioxidant activity, and the effect of topical application on the skin wound healing, in animal model, of hydrogels containing the AE, chlorogenic acid (CGA), allantoin (positive control), and carbopol (negative control). The treatments’ performance was compared by measuring the reduction of the wound area, with superior result (p<0.05) for the green coffee AE (78.20%) with respect to roasted coffee AE (53.71%), allantoin (70.83%), and carbopol (23.56%). CGA hydrogels reduced significantly the wound area size on the inflammatory phase, which may be associated with the well known antioxidant and anti-inflammatory actions of that compound. The topic use of the coffee AE studied improved the skin wound healing and points to an interesting biotechnological application of the coffee bean residual press cake.

Scarless wound repair: a human fetal skin model

Development ◽  
1992 ◽  
Vol 114 (1) ◽  
pp. 253-259 ◽  
Author(s):  
H.P. Lorenz ◽  
M.T. Longaker ◽  
L.A. Perkocha ◽  
R.W. Jennings ◽  
M.R. Harrison ◽  
...  
Keyword(s):  
Wound Healing ◽  
Gestational Age ◽  
Animal Studies ◽  
Wound Repair ◽  
Mouse Skin ◽  
Skin Wound ◽  
Scar Formation ◽  
Fetal Skin ◽  
Skin Wound Healing ◽  
Thickness Skin

Animal studies demonstrate that the fetus heals cutaneous wounds by reformation of normal tissue architecture without scar formation. We have developed a new model to study human fetal skin wound healing. Grafts of human fetal skin placed onto athymic mice retain the morphologic features of normal development, although they differentiate at an accelerated rate when placed cutaneously compared to subcutaneously. Full-thickness skin grafts from human fetuses at 15 (n = 12), 17 (n = 11), 18 (n = 25), 19 (n = 20) and 22 (n = 13) weeks gestational age were placed onto athymic (nu/nu) mice in 2 locations: (1) cutaneously onto a fascial bed and thereby exposed to air or (2) subcutaneously in a pocket under the murine panniculus carnosus. Linear incisions were made in each graft 7 days after transplantation. Grafts were harvested at 7, 14 and 21 days postwounding and analyzed histologically for scar formation. By hematoxylin & eosin and Mallory's trichrome stains, complete epidermal and dermal graft wound healing without scar formation was demonstrated in the subcutaneous grafts at each gestational age studied. In contrast, scar was seen at all time points in the cutaneous grafts in both the incisional wound and at the interface of the fetal human skin graft and adult mouse skin, regardless of fetal skin gestational age.(ABSTRACT TRUNCATED AT 250 WORDS)

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