Schwann cell migration through freeze-killed peripheral nerve grafts without accompanying axons

1991 ◽  
Vol 82 (3) ◽  
pp. 193-199 ◽  
Author(s):  
P. N. Anderson ◽  
W. Nadim ◽  
M. Turmaine
Keyword(s):  
Cell Migration ◽  
Schwann Cell ◽  
Peripheral Nerve ◽  
Nerve Grafts ◽  
Peripheral Nerve Grafts ◽  
Schwann Cell Migration

LncRNA BC088259 promotes Schwann cell migration through Vimentin following peripheral nerve injury

Glia ◽  
2019 ◽  
Vol 68 (3) ◽  
pp. 670-679 ◽  
Author(s):  
Chun Yao ◽  
Yanping Chen ◽  
Jing Wang ◽  
Tianmei Qian ◽  
Wei Feng ◽  
...  
Keyword(s):  
Cell Migration ◽  
Schwann Cell ◽  
Peripheral Nerve ◽  
Nerve Injury ◽  
Peripheral Nerve Injury ◽  
Schwann Cell Migration

scholarly journals Betacellulin Regulates Peripheral Nerve Regeneration by Affecting Schwann Cell Migration and Axon Elongation

2021 ◽  
Author(s):  
Yaxian Wang ◽  
Fuchao Zhang ◽  
Yunsong Zhang ◽  
Qi Shan ◽  
Wei Liu ◽  
...  
Keyword(s):  
Cell Migration ◽  
Schwann Cell ◽  
Peripheral Nerve ◽  
Schwann Cells ◽  
Nerve Injury ◽  
Peripheral Nerve Injury ◽  
Cultured Cells ◽  
Axon Elongation ◽  
Schwann Cell Migration

Abstract Background Growth factors execute essential biological functions and affect various physiological and pathological processes, including peripheral nerve injury and regeneration. Our previous sequencing analysis found that betacellulin (Btc), an epidermal growth factor protein family member, showed elevated mRNA expressions in the nerve segment after rat peripheral nerve injury, implying the potential involvement of Btc during peripheral nerve repair. Methods Expression of Btc was examined in Schwann cells. The role of Btc in regulating Schwann cells was investigated by transfecting cultured cells with siRNA segment against Btc or exposed cultured cells with Btc recombinant protein, respectively. The biological functions of Schwann cell-secreted Btc on neurons were also determined. Moreover, the in vivo effect of Btc on Schwann cell migration and axon elongation after rat sciatic nerve injury were further evaluated.Results Immunostaining images and ELISA readings showed Btc was present in and secreted by Schwann cells. Transwell migration and wound healing observations showed that siRNA against Btc impeded Schwann cell migration while exogenous Btc advanced Schwann cell migration. Besides the regulating effect on Schwann cell phenotype, Btc secreted by Schwann cells might influence neuron behavior and affect axon length. In vivo evidence showed that Btc enhanced axonal regrowth and nerve regeneration after both rat sciatic nerve crush injury and transection injury. Conclusion Our findings demonstrated Btc-mediated Schwann cell-axon interactions, revealed the essential roles of Btc on Schwann cell migration and axon elongation, and implied the potential application of Btc as a regenerative strategy for treating peripheral nerve injury.

scholarly journals Matrix metalloproteinase 7 promoted Schwann cell migration and myelination after rat sciatic nerve injury

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Hongkui Wang ◽  
Ping Zhang ◽  
Jun Yu ◽  
Fuchao Zhang ◽  
Wenzhao Dai ◽  
...  
Keyword(s):  
Cell Migration ◽  
Sciatic Nerve ◽  
Schwann Cell ◽  
Peripheral Nerve ◽  
Nerve Regeneration ◽  
Schwann Cells ◽  
Nerve Injury ◽  
Peripheral Nerve Regeneration ◽  
Schwann Cell Migration

AbstractSchwann cells experience de-differentiation, proliferation, migration, re-differentiation and myelination, and participate in the repair and regeneration of injured peripheral nerves. Our previous sequencing analysis suggested that the gene expression level of matrix metalloproteinase 7 (MMP7), a Schwann cell-secreted proteolytic enzyme, was robustly elevated in rat sciatic nerve segments after nerve injury. However, the biological roles of MMP7 are poorly understood. Here, we exposed primary cultured Schwann cells with MMP7 recombinant protein and transfected siRNA against MMP7 into Schwann cells to examine the effect of exogenous and endogenous MMP7. Meanwhile, the effects of MMP7 in nerve regeneration after sciatic nerve crush in vivo were observed. Furthermore, RNA sequencing and bioinformatic analysis of Schwann cells were conducted to show the molecular mechanism behind the phenomenon. In vitro studies showed that MMP7 significantly elevated the migration rate of Schwann cells but did not affect the proliferation rate of Schwann cells. In vivo studies demonstrated that increased level of MMP7 contributed to Schwann cell migration and myelin sheaths formation after peripheral nerve injury. MMP7-mediated genetic changes were revealed by sequencing and bioinformatic analysis. Taken together, our current study demonstrated the promoting effect of MMP7 on Schwann cell migration and peripheral nerve regeneration, benefited the understanding of cellular and molecular mechanisms underlying peripheral nerve injury, and thus might facilitate the treatment of peripheral nerve regeneration in clinic.

ApoER2 and Reelin are expressed in regenerating peripheral nerve and regulate Schwann cell migration by activating the Rac1 GEF protein, Tiam1

2015 ◽  
Vol 69 ◽  
pp. 1-11 ◽  
Author(s):  
Consuelo Pasten ◽  
Joaquín Cerda ◽  
Ignacio Jausoro ◽  
Felipe A. Court ◽  
Alfredo Cáceres ◽  
...  
Keyword(s):  
Cell Migration ◽  
Schwann Cell ◽  
Peripheral Nerve ◽  
Schwann Cell Migration

Regulation of expression of fibronectin and its receptor, alpha 5 beta 1, during development and regeneration of peripheral nerve

Development ◽  
1992 ◽  
Vol 116 (3) ◽  
pp. 767-782 ◽  
Author(s):  
F. Lefcort ◽  
K. Venstrom ◽  
J.A. McDonald ◽  
L.F. Reichardt
Keyword(s):  
Extracellular Matrix ◽  
Cell Migration ◽  
Schwann Cell ◽  
Peripheral Nerve ◽  
Integrin Receptor ◽  
Regulation Of Expression ◽  
Receptor Alpha ◽  
Peripheral Neurons ◽  
Schwann Cell Migration ◽  
Regenerating Nerve

The extracellular matrix glycoprotein, fibronectin, is a potent promoter of peripheral neurite outgrowth. Interactions of peripheral neurons with fibronectin have been shown to be primarily mediated by the beta 1 class of integrin heterodimers. In the present study, we have examined the expression and regulation of fibronectin and its integrin receptor, alpha 5 beta 1, in developing and regenerating chick peripheral nerve. We show that fibronectin and alpha 5 beta 1 are expressed at comparatively high levels in developing nerve with alpha 5 beta 1 expression on axons and non-neuronal cells. With nerve maturation, both proteins are less prominently expressed and the cellular pattern of alpha 5 beta 1 expression becomes more restricted. Following lesion of mature nerve, both fibronectin and alpha 5 beta 1 are strongly induced with prominent expression of alpha 5 beta 1 on regenerating neurites and Schwann cells. The elevation in fibronectin levels in the regenerating nerve is highest in the vicinity of the lesion, an area undergoing extensive cellular remodeling including Schwann cell migration and growth cone extension. Our results suggest that fibronectin and its receptor, alpha 5 beta 1, may mediate functionally important interactions in the development and regeneration of peripheral nerve.

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