Previous studies have demonstrated that peripheral denervation of the skin is reflected in the CNS as a reorganization of somatotopic representations. In cases in which peripheral nerve regeneration occurs there is a gradual reactivation of cortex by novel receptive fields that is reversed as regenerated nerves reestablish connections with the original skin surface. Functional recovery appears ...

a common cause of peripheral nerve injury is trauma. the positive effect of antioxidants on the improvement of nerve regeneration has currently become a focus of attention. in this experiment, the effect of intraperitoneal administration of ubiquinone (coq10) on an acute experimentally sciatic nerve crush was studied in a rat model. forty-five male wistar rats, weighing between 160-180 g were u...

OBJECTIVE To determine the feasibility of performing electrical impedance myography (EIM) in rats. METHODS EIM was performed on the hamstring muscles of 6 healthy adult rats with applied frequencies of 2-300 kHz. Studies were performed over a 6-week period, with 3 rats having recordings made from the skin (surface EIM) and 3 with recordings directly from the muscle (direct-muscle EIM). In add...

We report a role for Nogo receptors (NgRs) in macrophage efflux from sites of inflammation in peripheral nerve. Increasing numbers of macrophages in crushed rat sciatic nerves express NgR1 and NgR2 on the cell surface in the first week after injury. These macrophages show reduced binding to myelin and MAG in vitro, which is reversed by NgR siRNA knockdown and by inhibiting Rho-associated kinase...

Introduction: The peripheral nervous system is remarkable in its ability to regenerate after injury because of a local permissive environment and activation of the neuronal intrinsic growth capacity. Local induction of inflammatory cytokines, which are produced by macrophages and Schwann cells, plays a crucial role in controlling Wallerian degeneration (WD) and nerve regeneration (1). Tumor nec...

Male adult Sprague-Dawley rats were subjected to unilateral crush injury, and expression of LPL protein and mRNA were assessed as a function of time post-crush. LPL activity increased in the distal portion of the injured nerve by Day 4 post-crush, after which LPL activity gradually returned to normal levels. Conversely, quantification of LPL mRNA by reverse transcription-polymerase chain reacti...

MicroRNA (miRNA) has great potential to treat a wide range of illnesses by regulating the expression of eukaryotic genes. Biomaterials with high transfection efficiency and low toxicity are needed to deliver miRNA to target cells. In this study, a biodegradable and biocompatible cationic polymer (PDAPEI) was synthetized from low molecular weight polyethyleneimine (PEI1.8kDa) cross-linked with 2...

The present study evaluated the neuroprotective and antioxidant effects of quercetin in a rat model of sciatic nerve crush injury using histopathological, morphometric and biochemical methods. A total of 48 male Sprague Dawley rats, aged 10-12 weeks old were randomly divided into eight groups, consisting of two sham groups (S-7, S-28), three quercetin-treated groups (Q-7, Q-28; 200 mg/kg/7 days...

Progressive tactile hypersensitivity (PTH) manifesting after sciatic nerve crush and spared nerve injury (SNI) are two distinct rodent experimental models of neuropathic pain. PTH develops months after recovery from the nerve crush in response to repeated intermittent low-threshold mechanical stimulation of the reinnervated sciatic nerve skin territory and represents a model of stimulus-induced...