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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(1
): 533
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An injectable hydrogel enhances tissue repair after spinal cord injury by
promoting extracellular matrix remodeling
#MMPMID28912446
Hong LTA
; Kim YM
; Park HH
; Hwang DH
; Cui Y
; Lee EM
; Yahn S
; Lee JK
; Song SC
; Kim BG
Nat Commun
2017[Sep]; 8
(1
): 533
PMID28912446
show ga
The cystic cavity that develops following injuries to brain or spinal cord is a
major obstacle for tissue repair in central nervous system (CNS). Here we report
that injection of imidazole-poly(organophosphazenes) (I-5), a hydrogel with
thermosensitive sol-gel transition behavior, almost completely eliminates cystic
cavities in a clinically relevant rat spinal cord injury model. Cystic cavities
are bridged by fibronectin-rich extracellular matrix. The fibrotic extracellular
matrix remodeling is mediated by matrix metalloproteinase-9 expressed in
macrophages within the fibrotic extracellular matrix. A poly(organophosphazenes)
hydrogel lacking the imidazole moiety, which physically interacts with
macrophages via histamine receptors, exhibits substantially diminished bridging
effects. I-5 injection improves coordinated locomotion, and this functional
recovery is accompanied by preservation of myelinated white matter and motor
neurons and an increase in axonal reinnervation of the lumbar motor neurons. Our
study demonstrates that dynamic interactions between inflammatory cells and
injectable biomaterials can induce beneficial extracellular matrix remodeling to
stimulate tissue repair following CNS injuries.The cystic cavity that develops
following injuries to brain or spinal cord is a major obstacle. Here the authors
show an injection of imidazole poly(organophosphazenes), a hydrogel with
thermosensitive sol-gel transition behavior, almost completely eliminates cystic
cavities in a clinically relevant rat spinal cord injury model.