Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/88074
Type: Artigo
Title: Neuroprotective effect of tempol (4 hydroxy-tempo) on neuronal death induced by sciatic nerve transection in neonatal rats
Author: Chiarotto, Gabriela Bortolanca
Drummond, Luisa
Cavarretto, Gabriela
Bombeiro, André Luis
Oliveira, Alexandre Leite Rodrigues de
Abstract: Peripheral nerve injury in newborn rats triggers extensive neuronal death within the spinal cord. Because most neurodegeneration is related to oxidative stress and apoptosis, the use of antioxidants may be of therapeutic interest. Tempol is promising because of its ability to chelate reactive oxygen species and to minimize or even prevent tissue damage. Here, we evaluated neuroprotective effects of tempol following neonatal sciatic nerve transection. Two-day-old pups underwent sciatic nerve axotomy followed by tempol (12, 24 and 48. mg/kg) treatment (i.p.) at 10. min, 6. h, and every 24. h up to 1 week after injury. The rats were then killed for lumbar intumescence analysis. Nissl staining, TUNEL, synaptophysin immunolabeling and qRT-PCR (Caspase 3, Bax and Bcl2) were carried out. The results indicated that tempol treatment, at 24. mg/kg, increased up to 21% spinal cord motoneuron survival (p< 0.001), also preserving pre-synaptic terminals in the neuropile. Likewise, the TUNEL-positive cell number decreased in tempol-treated animals. qRT-PCR results indicated differential increase in Caspase 3 (3-fold), Bax (13-fold) and Bcl2 (28-fold) gene expression, after 12. h following axotomy and tempol treatment. In conclusion, tempol administration has proven to be neuroprotective after neonatal nerve injury, leading to improved motoneuron survival, synapse preservation and minimizing apoptosis. © 2014 Elsevier Inc.
Peripheral nerve injury in newborn rats triggers extensive neuronal death within the spinal cord. Because most neurodegeneration is related to oxidative stress and apoptosis, the use of antioxidants may be of therapeutic interest. Tempol is promising beca
Subject: Neuroproteção
Neurônios motores
Tempol
Medula espinhal
Nervo isquiático
Apoptose
Country: Estados Unidos
Editor: Elsevier
Citation: Brain Research Bulletin. Elsevier Inc., v. 106, n. , p. 1 - 8, 2014.
Rights: fechado
fechado
Identifier DOI: 10.1016/j.brainresbull.2014.04.010
Address: https://www.sciencedirect.com/science/article/pii/S0361923014000641
Date Issue: 2014
Appears in Collections:IB - Artigos e Outros Documentos

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