(−)-Epigallocatechin-3-gallate (EGCG) attenuates peripheral nerve degeneration in rat sciatic nerve crush injury

2013 ◽  
Vol 62 (3) ◽  
pp. 221-231 ◽  
Author(s):  
Waleed M. Renno ◽  
May Al-Maghrebi ◽  
Ahmad AlShammari ◽  
Preethi George
Keyword(s):  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Crush Injury ◽  
Nerve Degeneration ◽  
Sciatic Nerve Crush ◽  
Nerve Crush ◽  
Rat Sciatic Nerve ◽  
Nerve Crush Injury

scholarly journals Reduced Renshaw Recurrent Inhibition after Neonatal Sciatic Nerve Crush in Rats

2014 ◽  
Vol 2014 ◽  
pp. 1-11
Author(s):  
Liang Shu ◽  
Jingjing Su ◽  
Lingyan Jing ◽  
Ying Huang ◽  
Yu Di ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Nerve Injury ◽  
Peripheral Nerve Injury ◽  
Recurrent Inhibition ◽  
Crush Injury ◽  
Sciatic Nerve Crush ◽  
Nerve Crush ◽  
Nerve Crush Injury

Renshaw recurrent inhibition (RI) plays an important gated role in spinal motion circuit. Peripheral nerve injury is a common disease in clinic. Our current research was designed to investigate the change of the recurrent inhibitory function in the spinal cord after the peripheral nerve crush injury in neonatal rat. Sciatic nerve crush was performed on 5-day-old rat puppies and the recurrent inhibition between lateral gastrocnemius-soleus (LG-S) and medial gastrocnemius (MG) motor pools was assessed by conditioning monosynaptic reflexes (MSR) elicited from the sectioned dorsal roots and recorded either from the LG-S and MG nerves by antidromic stimulation of the synergist muscle nerve. Our results demonstrated that the MSR recorded from both LG-S or MG nerves had larger amplitude and longer latency after neonatal sciatic nerve crush. The RI in both LG-S and MG motoneuron pools was significantly reduced to virtual loss (15–20% of the normal RI size) even after a long recovery period upto 30 weeks after nerve crush. Further, the degree of the RI reduction after tibial nerve crush was much less than that after sciatic nerve crush indicatig that the neuron-muscle disconnection time is vital to the recovery of the spinal neuronal circuit function during reinnervation. In addition, sciatic nerve crush injury did not cause any spinal motor neuron loss but severally damaged peripheral muscle structure and function. In conclusion, our results suggest that peripheral nerve injury during neonatal early development period would cause a more sever spinal cord inhibitory circuit damage, particularly to the Renshaw recurrent inhibition pathway, which might be the target of neuroregeneration therapy.

scholarly journals Neuroprotective Effect of Nypa fruticans Wurmb by Suppressing TRPV1 Following Sciatic Nerve Crush Injury in a Rat

Nutrients ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2618
Author(s):  
Mi-Sun Kang ◽  
Gil-Hyun Lee ◽  
Go-Eun Choi ◽  
Hae-Gyung Yoon ◽  
Kyung-Yae Hyun
Keyword(s):  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Functional Recovery ◽  
Treated Group ◽  
Crush Injury ◽  
Sciatic Nerve Crush ◽  
Neuroprotective Effects ◽  
Nerve Crush ◽  
Nypa Fruticans ◽  
Nerve Crush Injury

Peripheral nerve injury can result in severe functional impairment and decreased quality of life due to loss of sensory and motor function. Nypa fruticans wurmb (NF) has been used in diverse folk remedies in East Asia. We have previously shown that Nypa fruticans wurmb extract has antinociceptive and anti-inflammatory effects by suppressing TRPV1 in the sciatic nerve injury. The present study investigated the effects of NF on the control of TRPV1 in relation to neuroprotective effects of a sciatic nerve crush injury. To evaluate the neuroprotective effects, an animal behavior test and a physiological function test were performed. Functional recovery and nerve recovery were improved in the NF and NF + SB (SB366791; TRPV1 antagonist) treated group. In the histomorphology evaluation, the neuronal regenerative effect of NF on the injured sciatic nerve was confirmed via hematoxylin and eosin (H&E) staining. In this study, the NF and NF + SB treated group showed neuroprotective and functional recovery effects from the sciatic nerve crush injury. Furthermore, the expression of NF-κB and iNOS showed a significantly suppressive effect on NF (p < 0.01), SB (p < 0.01), and NF + SB (p < 0.01) treated group at the 7th and 14th day compared to the vehicle group. This study confirmed the neuroprotective effects of NF on suppressing TRPV1 in a sciatic nerve crush injury. The findings of this study establish the effect of NF as a neurotherapeutic agent to protect the peripheral nerve after a sciatic nerve crush injury.

scholarly journals Ultrasound-guided platelet-rich plasma injection and multimodality ultrasound examination of peripheral nerve crush injury

2020 ◽  
Vol 5 (1) ◽  
Author(s):  
Yaqiong Zhu ◽  
Zhuang Jin ◽  
Jing Wang ◽  
Siming Chen ◽  
Yongqiang Hu ◽  
...  
Keyword(s):  
Sciatic Nerve ◽  
Peripheral Nerve ◽  
Platelet Rich Plasma ◽  
Blood Platelets ◽  
Crush Injury ◽  
Sciatic Nerve Crush ◽  
Maximal Effect ◽  
Ultrasound Guided ◽  
Nerve Crush ◽  
Nerve Crush Injury

AbstractUltrasound-guided platelet-rich plasma (PRP) injection is able to make up for the limitations of applying a single growth factor. The goal of this study was to investigate the effects of serial ultrasound-guided PRP injections of the appropriate concentration on the treatment of sciatic nerve crush injury, and explore the value of multimodality ultrasound techniques in evaluating the prognosis of crushed peripheral nerve. In vitro, optimal concentration of PRP (from 150%, 250%, 450%, and 650%) was screened due for its maximal effect on proliferation and neurotrophic function of Schwann cells (SCs). In vivo, ninety rabbits were equally and randomly divided into normal control, model, PRP-2.5×, PRP-4.5×, and PRP-6.5× groups. The neurological function and electrophysiological recovery evaluation, and the comparison of the multimodality ultrasound evaluation with the histological results of sciatic nerve crush injury were performed to investigate the regenerative effects of PRP at different concentrations on the sciatic nerve crush injury. Our results showed that the PRP with a 4.5-fold concentration of whole blood platelets could significantly stimulate the proliferation and secretion of SCs and nerve repair. The changes in stiffness and blood perfusion were positively correlated with the collagen area percentage and VEGF expression in the injured nerve, respectively. Thus, serial ultrasound-guided PRP injections at an appropriate concentration accelerates the recovery of axonal function. Multimodality ultrasound techniques provide a clinical reference for prognosis by allowing the stiffness and microcirculation perfusion of crush-injured peripheral nerves to be quantitatively evaluated.

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