scholarly journals Human mesenchymal stem cell-derived exosomes promote orderly cartilage regeneration in an immunocompetent rat osteochondral defect model

Author(s):  
Shipin Zhang ◽  
Keng Lin Wong ◽  
Wern Cui Chu ◽  
Ruenn Chai Lai ◽  
James Hoi Po Hui ◽  
...  
2020 ◽  
Vol 5 (38) ◽  
pp. eaay6626 ◽  
Author(s):  
Gwangjun Go ◽  
Sin-Gu Jeong ◽  
Ami Yoo ◽  
Jiwon Han ◽  
Byungjeon Kang ◽  
...  

Targeted cell delivery by a magnetically actuated microrobot with a porous structure is a promising technique to enhance the low targeting efficiency of mesenchymal stem cell (MSC) in tissue regeneration. However, the relevant research performed to date is only in its proof-of-concept stage. To use the microrobot in a clinical stage, biocompatibility and biodegradation materials should be considered in the microrobot, and its efficacy needs to be verified using an in vivo model. In this study, we propose a human adipose–derived MSC–based medical microrobot system for knee cartilage regeneration and present an in vivo trial to verify the efficacy of the microrobot using the cartilage defect model. The microrobot system consists of a microrobot body capable of supporting MSCs, an electromagnetic actuation system for three-dimensional targeting of the microrobot, and a magnet for fixation of the microrobot to the damaged cartilage. Each component was designed and fabricated considering the accessibility of the patient and medical staff, as well as clinical safety. The efficacy of the microrobot system was then assessed in the cartilage defect model of rabbit knee with the aim to obtain clinical trial approval.


PLoS ONE ◽  
2017 ◽  
Vol 12 (2) ◽  
pp. e0172925 ◽  
Author(s):  
Dale B. Bosco ◽  
Mark D. Roycik ◽  
Yonghao Jin ◽  
Martin A. Schwartz ◽  
Ty J. Lively ◽  
...  

2009 ◽  
Vol 214 (5) ◽  
pp. 759-767 ◽  
Author(s):  
Florian Haasters ◽  
Wolf Christian Prall ◽  
David Anz ◽  
Carole Bourquin ◽  
Christoph Pautke ◽  
...  

2009 ◽  
Vol 105 (7) ◽  
pp. 07B314 ◽  
Author(s):  
Chung-Yi Yang ◽  
Ming-Fong Tai ◽  
Shin-Tai Chen ◽  
Yi-Ting Wang ◽  
Ya-Fang Chen ◽  
...  

2009 ◽  
Vol 1239 ◽  
Author(s):  
Karla Brammer ◽  
Seunghan Oh ◽  
Sungho Jin

AbstractTwo important goals in stem cell research are to control the cell proliferation without differentiation, and also to direct the differentiation into a specific cell lineage when desired. Recent studies indicate that the nanostructures substantially influence the stem cell behavior. It is well known that mesenchymal stem cells (MSCs) are multipotent stem cells that can differentiate into stromal lineages such as adipocyte, chondrocyte, fibroblast, myocyte, and osteoblast cell types. By examining the cellular behavior of MSCs cultured in vitro on nanostructures, some understanding of the effects that the nanostructures have on the stem cell’s response has been obtained. Here we demonstrate that TiO2 nanotubes produced by anodization on Ti implant surface can regulate human mesenchymal stem cell (hMSC) differentiation towards an osteoblast lineage in the absence of osteogenic inducing factors. Altering the dimensions of nanotubular-shaped titanium oxide surface structures independently allowed either augmented human mesenchymal stem cell (hMSC) adhesion at smaller diameter levels or a specific differentiation of hMSCs into osteoblasts using only the geometric cues. Small (˜30 nm diameter) nanotubes promoted adhesion without noticeable differentiation, while larger (˜70 - 100 nm diameter) nanotubes elicited a dramatic, ˜10 fold stem cell elongation, which induced cytoskeletal stress and selective differentiation into osteoblast-like cells, offering a promising nanotechnology-based route for novel orthopaedics-related hMSC treatments. The fact that a guided and preferential osteogenic differentiation of stem cells can be achieved using substrate nanotopography alone without using potentially toxic, differentiation-inducing chemical agents is significant, which can be useful for future development of novel and enhanced stem cell control and therapeutic implant development.


2011 ◽  
Vol 17 (5-6) ◽  
pp. 777-788 ◽  
Author(s):  
Chun-hei Li ◽  
Tsz-Kit Chik ◽  
Alfonso H.W. Ngan ◽  
Stanley C.H. Chan ◽  
Daisy K.Y. Shum ◽  
...  

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