S Rossi1, C Motta1, V Studer1, C Rocchi2, G Macchiarulo1, F Barbieri1, Ga Marfia2, R Furlan3, G Martino3, R Mancino4, D Centonze5. 1. Clinica Neurologica, Dipartimento di Medicina dei Sistemi, Università Tor Vergata, Italy/Fondazione Santa Lucia/Centro Europeo per la Ricerca sul Cervello (CERC), Italy. 2. Clinica Neurologica, Dipartimento di Medicina dei Sistemi, Università Tor Vergata, Italy. 3. Neuroimmunology Unit, Institute of Experimental Neurology (INSpe), Division of Neuroscience, San Raffaele Scientific Institute, Italy. 4. Clinica Oculistica, Dipartimento di Biopatologia, Università Tor Vergata, Italy. 5. Clinica Neurologica, Dipartimento di Medicina dei Sistemi, Università Tor Vergata, Italy/Fondazione Santa Lucia/Centro Europeo per la Ricerca sul Cervello (CERC), Italy centonze@uniroma2.it.
Abstract
BACKGROUND: Acute optic neuritis is often in association with multiple sclerosis (MS). Proinflammatory cytokines trigger neuronal damage in neuroinflammatory disorders but their role in optic neuritis is poorly investigated. OBJECTIVE: The objective of this work is to investigate the associations of intrathecal contents of proinflammatory cytokines with transient and persistent dysfunctions after optic neuritis. METHODS: In 50 MS patients followed for up to six months, cerebrospinal fluid (CSF) levels of IL-1β, TNF and IL-8 were determined, along with clinical, neurophysiological and morphological measures of optic neuritis severity. RESULTS: Visual impairment, measured by high- and low-contrast visual acuity, and delayed visual-evoked potential (VEP) latencies were significantly correlated to IL-8 levels during optic neuritis. IL-8 at the time of optic neuritis was also associated with persistent demyelination and final axonal loss, inferred by VEP and optical coherence tomography measures, respectively. Contents of IL-8 were correlated to functional visual outcomes, being higher among patients with incomplete recovery. Multivariate analysis confirmed that IL-8 significantly predicted final visual acuity, at equal values of demographics and baseline visual scores. CONCLUSION: Our study points to IL-8 as the main inflammatory cytokine associated with demyelination and secondary neurodegeneration in the optic nerve after optic neuritis.
BACKGROUND: Acute optic neuritis is often in association with multiple sclerosis (MS). Proinflammatory cytokines trigger neuronal damage in neuroinflammatory disorders but their role in optic neuritis is poorly investigated. OBJECTIVE: The objective of this work is to investigate the associations of intrathecal contents of proinflammatory cytokines with transient and persistent dysfunctions after optic neuritis. METHODS: In 50 MSpatients followed for up to six months, cerebrospinal fluid (CSF) levels of IL-1β, TNF and IL-8 were determined, along with clinical, neurophysiological and morphological measures of optic neuritis severity. RESULTS:Visual impairment, measured by high- and low-contrast visual acuity, and delayed visual-evoked potential (VEP) latencies were significantly correlated to IL-8 levels during optic neuritis. IL-8 at the time of optic neuritis was also associated with persistent demyelination and final axonal loss, inferred by VEP and optical coherence tomography measures, respectively. Contents of IL-8 were correlated to functional visual outcomes, being higher among patients with incomplete recovery. Multivariate analysis confirmed that IL-8 significantly predicted final visual acuity, at equal values of demographics and baseline visual scores. CONCLUSION: Our study points to IL-8 as the main inflammatory cytokine associated with demyelination and secondary neurodegeneration in the optic nerve after optic neuritis.
Authors: Mario Stampanoni Bassi; Sara Garofalo; Girolama A Marfia; Luana Gilio; Ilaria Simonelli; Annamaria Finardi; Roberto Furlan; Giulia M Sancesario; Jonny Di Giandomenico; Marianna Storto; Francesco Mori; Diego Centonze; Ennio Iezzi Journal: Front Mol Neurosci Date: 2017-11-21 Impact factor: 5.639
Authors: Flávia Dos Santos Souza; Nicole Lardini Freitas; Yago Côrtes Pinheiro Gomes; Rafael Carvalho Torres; Juliana Echevarria-Lima; Isaac Lima da Silva-Filho; Ana Claudia Celestino Bezerra Leite; Marco Antonio Sales Dantas de Lima; Marcus Tulius Teixeira da Silva; Abelardo de Queiroz Campos Araújo; Otávio Melo Espíndola Journal: Front Immunol Date: 2021-10-26 Impact factor: 7.561