Conductive and antimicrobial macroporous nanocomposite hydrogels generated from air-in-water Pickering emulsions for neural stem cell differentiation and skin wound healing

2020 ◽  
Vol 8 (24) ◽  
pp. 6957-6968
Author(s):  
Mingjian Xu ◽  
Qingtao Li ◽  
Zhou Fang ◽  
Min Jin ◽  
Qing Zeng ◽  
...  

Conductive and antimicrobial macroporous hydrogels have shown promising applications in promoting soft tissue regeneration.

2005 ◽  
Vol 16 (12) ◽  
pp. 918-924 ◽  
Author(s):  
Hongrun Yu ◽  
Subburaman Mohan ◽  
Godfred L. Masinde ◽  
David J. Baylink

2011 ◽  
Vol 12 (2) ◽  
pp. 155-163 ◽  
Author(s):  
Brian J Philips ◽  
Kacey G Marra ◽  
J Peter Rubin

2011 ◽  
Vol 93 (2) ◽  
pp. 228-234 ◽  
Author(s):  
Mohsen Khosravi Maharlooei ◽  
Mansooreh Bagheri ◽  
Zhabiz Solhjou ◽  
Behnam Moein Jahromi ◽  
Majid Akrami ◽  
...  

2020 ◽  
Author(s):  
Yao Liu ◽  
Xueying Zhuang ◽  
Si Yu ◽  
Ning Yang ◽  
Jianhong Zeng ◽  
...  

Abstract Background: Reconstruction of complex critical-size defects (CSD) in craniofacial region is a major challenge, and the soft tissue regeneration is crucial in determining the therapeutic outcome of craniofacial CSD. Stem cells from apical papilla (SCAP) are neural crest-derived mesenchymal stem cells (MSCs) which are homologous to craniofacial tissue, and represent a promising source for craniofacial tissue regeneration. Exosomes, which contained compound bioactive contents, are the key factors of stem cell paracrine action. However, the roles of exosomes derived from SCAP (SCAP-Exo) in tissue regeneration are not fully understood. Here, we explored the effects and underlying mechanisms of SCAP-Exo on CSD in maxillofacial soft tissue.Methods: SCAP-Exo were isolated and identified by transmission electron microscopy and nanoparticle tracking analysis. The effects of SCAP-Exo on wound healing and vascularisation were detected by measuring wound area, histological and immunofluorescence analysis in the palate gingiva CSD of mice. Real-time live cell imaging and functional assays were used to assess the effects of SCAP-Exo on the biological functions of endothelial cells (ECs). Furthermore, the molecular mechanisms of SCAP-Exo mediated ECs angiogenesis in vitro was tested by immunofluorescence staining, Western blot and Pull-Down assays. Finally, in vivo experiments were carried out to verify whether SCAP-Exo could affect the vascularisation and wound healing through Cdc42.Results: We showed that SCAP-Exo promoted tissue regeneration of palatal gingiva CSD by enhancing vascularisation in the early phase in vivo, and also indicated SCAP-Exo improved the angiogenic capacity of endothelial cells (ECs) in vitro. Mechanistically, SCAP-Exo elevated cell migration by improving cytoskeletal reorganization of ECs via cell division cycle 42 (Cdc42) signalling. Furthermore, we revealed that SCAP-Exo transferred Cdc42 into the cytoplasm of ECs, and the Cdc42 protein could be reused directly by the recipient ECs, which resulted in the activation of Cdc42 dependent filopodia formation and elevation of cell migration of ECs.Conclusion: This study demonstrated that SCAP-Exo had a superior effect on angiogenesis and effectively promoted craniofacial soft tissue regeneration. These data provide a new option for SCAP-Exo to be used as a cell-free approach to optimize tissue regeneration in the clinic.


2018 ◽  
Vol 1 (1) ◽  
pp. 31-36
Author(s):  
Sylwia Klewin‑Steinböck ◽  
Marzena Wyganowska‑Świątkowska

Amelogenins are a mixture of hydrophobic proteins that are the major organic components of developing enamel. The main functions of the amelogenins and their degradation products are structural roles in creating the space and environment for promoting enamel mineralization. They are used in periodontal surgery to guide tissue regeneration. Based on clinical evidences that amelogenins positively affect the healing of periodontium tissue new application for amelogenins have been suggested. Conducted research confirmed that amelogenins can be used in skin wound healing.


2016 ◽  
Vol 113 (21) ◽  
pp. E2935-E2944 ◽  
Author(s):  
Xiaochen Zhou ◽  
Mingjia Tan ◽  
Mukesh K. Nyati ◽  
Yongchao Zhao ◽  
Gongxian Wang ◽  
...  

MLN4924, also known as pevonedistat, is the first-in-class inhibitor of NEDD8-activating enzyme, which blocks the entire neddylation modification of proteins. Previous preclinical studies and current clinical trials have been exclusively focused on its anticancer property. Unexpectedly, we show here, to our knowledge for the first time, that MLN4924, when applied at nanomolar concentrations, significantly stimulates in vitro tumor sphere formation and in vivo tumorigenesis and differentiation of human cancer cells and mouse embryonic stem cells. These stimulatory effects are attributable to (i) c-MYC accumulation via blocking its degradation and (ii) continued activation of EGFR (epidermal growth factor receptor) and its downstream pathways, including PI3K/AKT/mammalian target of rapamycin and RAS/RAF/MEK/ERK, via inducing EGFR dimerization. Finally, MLN4924 accelerates EGF-mediated skin wound healing in mouse and stimulates cell migration in an in vitro culture setting. Taking these data together, our study reveals that neddylation modification could regulate stem cell proliferation and differentiation and that a low dose of MLN4924 might have a therapeutic value for stem cell therapy and tissue regeneration.


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