Characterization of the sensory, affective, cognitive, biochemical, and neuronal alterations in a modified chronic constriction injury model of neuropathic pain in mice

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Medeiros, Priscila ; de Freitas, Renato Leonardo ; Boccella, Serena ; Iannotta, Monica ; Belardo, Carmela ; Mazzitelli, Mariacristina ; Romano, Rosaria ; De Gregorio, Danilo ; Coimbra, Norberto Cysne ; Palazzo, Enza ; Maione, Sabatino

• Tipo de documento: Artigo Científico
• Fonte: Journal of Neuroscience Research; v. 98, n. 2, p. 15-pg., 2019-08-08.

Resumo

The chronic constriction injury (CCI) of the sciatic nerve is a nerve injury-based model of neuropathic pain (NP). Comorbidities of NP such as depression, anxiety, and cognitive deficits are associated with a functional reorganization of the medial prefrontal cortex (mPFC). Here, we have employed an adapted model of CCI by placing one single loose ligature around the sciatic nerve in mice for investigating the alterations in sensory, motor, affective, and cognitive behavior and in electrophysiological and biochemical properties in the prelimbic division (PrL) of the mPFC. Our adapted model of CCI induced mechanical allodynia, motor, and cognitive impairments and anxiety- and depression-like behavior. In the PrL division of mPFC was observed an increase in GABA and a decrease in d-aspartate levels. Moreover an increase in the activity of neurons responding to mechanical stimulation with an excitation, mPFC (+), and a decrease in those responding with an inhibition, mPFC (-), was found. Altogether these findings demonstrate that a single ligature around the sciatic nerve was able to induce sensory, affective, cognitive, biochemical, and functional alterations already observed in other neuropathic pain models and it may be an appropriate and easily reproducible model for studying neuropathic pain mechanisms and treatments. (AU)

• Processo FAPESP: 14/11869-0 - EMU concedido no processo 2013/12916-0: aparelho para a neuroestimulação DBS (Thomas mini matrix system - Thomas recording GmbH® - winchester Strasse - Giessen - Germany)
• Beneficiário: Renato Leonardo de Freitas
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 13/12916-0 - Participação dos circuitos endocanabinóides, glutamatérgicos e endovanilóides do córtex pré-frontal medial no modelo de dor neuropática e da investigação das comorbidades dor crônica e outras desordens neurológicas
• Beneficiário: Renato Leonardo de Freitas
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores