Time-Dependent Nerve Growth Factor Signaling Changes in the Rat Retina During Optic Nerve Crush-Induced Degeneration of Retinal Ganglion Cells

Nerve growth factor (NGF) is suggested to be neuroprotective after nerve injury; however, retinal ganglion cells (RGC) degenerate following optic-nerve crush (ONC), even in the presence of increased levels of endogenous NGF. To further investigate this apparently paradoxical condition, a time-course...

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Veröffentlicht in:International journal of molecular sciences 2017-01, Vol.18 (1), p.98-98
Hauptverfasser: Mesentier-Louro, Louise A, De Nicolò, Sara, Rosso, Pamela, De Vitis, Luigi A, Castoldi, Valerio, Leocani, Letizia, Mendez-Otero, Rosalia, Santiago, Marcelo F, Tirassa, Paola, Rama, Paolo, Lambiase, Alessandro
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container_title International journal of molecular sciences
container_volume 18
creator Mesentier-Louro, Louise A
De Nicolò, Sara
Rosso, Pamela
De Vitis, Luigi A
Castoldi, Valerio
Leocani, Letizia
Mendez-Otero, Rosalia
Santiago, Marcelo F
Tirassa, Paola
Rama, Paolo
Lambiase, Alessandro
description Nerve growth factor (NGF) is suggested to be neuroprotective after nerve injury; however, retinal ganglion cells (RGC) degenerate following optic-nerve crush (ONC), even in the presence of increased levels of endogenous NGF. To further investigate this apparently paradoxical condition, a time-course study was performed to evaluate the effects of unilateral ONC on NGF expression and signaling in the adult retina. Visually evoked potential and immunofluorescence staining were used to assess axonal damage and RGC loss. The levels of NGF, proNGF, p75 , TrkA and GFAP and the activation of several intracellular pathways were analyzed at 1, 3, 7 and 14 days after crush (dac) by ELISA/Western Blot and PathScan intracellular signaling array. The progressive RGC loss and nerve impairment featured an early and sustained activation of apoptotic pathways; and GFAP and p75 enhancement. In contrast, ONC-induced reduction of TrkA, and increased proNGF were observed only at 7 and 14 dac. We propose that proNGF and p75 contribute to exacerbate retinal degeneration by further stimulating apoptosis during the second week after injury, and thus hamper the neuroprotective effect of the endogenous NGF. These findings might aid in identifying effective treatment windows for NGF-based strategies to counteract retinal and/or optic-nerve degeneration.
doi_str_mv 10.3390/ijms18010098
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De Nicolò, Sara ; Rosso, Pamela ; De Vitis, Luigi A ; Castoldi, Valerio ; Leocani, Letizia ; Mendez-Otero, Rosalia ; Santiago, Marcelo F ; Tirassa, Paola ; Rama, Paolo ; Lambiase, Alessandro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c445t-62acff57f7b7a5dca4b1cf68e4fa1b0d3cf2f6f38090361ca0dc2785366a6bb73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Activation analysis</topic><topic>Animals</topic><topic>Apoptosis</topic><topic>Blotting, Western</topic><topic>Crush tests</topic><topic>Damage assessment</topic><topic>Degeneration</topic><topic>Enzyme-linked immunosorbent assay</topic><topic>Evoked Potentials, Visual - physiology</topic><topic>Glial fibrillary acidic protein</topic><topic>Glial Fibrillary Acidic Protein - metabolism</topic><topic>Growth factors</topic><topic>Immunofluorescence</topic><topic>Intracellular</topic><topic>Intracellular signalling</topic><topic>Male</topic><topic>Microscopy, Fluorescence</topic><topic>Nerve Crush</topic><topic>Nerve growth factor</topic><topic>Nerve Growth Factor - metabolism</topic><topic>Nerve Growth Factors - metabolism</topic><topic>Nerve Tissue Proteins - metabolism</topic><topic>Neuroprotection</topic><topic>Optic nerve</topic><topic>Optic Nerve Injuries - complications</topic><topic>Protein Precursors - metabolism</topic><topic>Rats</topic><topic>Rats, Long-Evans</topic><topic>Receptor, trkA - metabolism</topic><topic>Receptors, Nerve Growth Factor - metabolism</topic><topic>Retina</topic><topic>Retina - metabolism</topic><topic>Retina - physiopathology</topic><topic>Retinal degeneration</topic><topic>Retinal Degeneration - etiology</topic><topic>Retinal Degeneration - metabolism</topic><topic>Retinal Degeneration - physiopathology</topic><topic>Retinal ganglion cells</topic><topic>Retinal Ganglion Cells - metabolism</topic><topic>Rodents</topic><topic>Signal Transduction</topic><topic>Staining</topic><topic>Time Factors</topic><topic>TrkA protein</topic><topic>TrkA receptors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mesentier-Louro, Louise A</creatorcontrib><creatorcontrib>De Nicolò, Sara</creatorcontrib><creatorcontrib>Rosso, Pamela</creatorcontrib><creatorcontrib>De Vitis, Luigi A</creatorcontrib><creatorcontrib>Castoldi, Valerio</creatorcontrib><creatorcontrib>Leocani, Letizia</creatorcontrib><creatorcontrib>Mendez-Otero, Rosalia</creatorcontrib><creatorcontrib>Santiago, Marcelo F</creatorcontrib><creatorcontrib>Tirassa, Paola</creatorcontrib><creatorcontrib>Rama, Paolo</creatorcontrib><creatorcontrib>Lambiase, Alessandro</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Health &amp; 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source MDPI - Multidisciplinary Digital Publishing Institute; MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central
subjects Activation analysis
Animals
Apoptosis
Blotting, Western
Crush tests
Damage assessment
Degeneration
Enzyme-linked immunosorbent assay
Evoked Potentials, Visual - physiology
Glial fibrillary acidic protein
Glial Fibrillary Acidic Protein - metabolism
Growth factors
Immunofluorescence
Intracellular
Intracellular signalling
Male
Microscopy, Fluorescence
Nerve Crush
Nerve growth factor
Nerve Growth Factor - metabolism
Nerve Growth Factors - metabolism
Nerve Tissue Proteins - metabolism
Neuroprotection
Optic nerve
Optic Nerve Injuries - complications
Protein Precursors - metabolism
Rats
Rats, Long-Evans
Receptor, trkA - metabolism
Receptors, Nerve Growth Factor - metabolism
Retina
Retina - metabolism
Retina - physiopathology
Retinal degeneration
Retinal Degeneration - etiology
Retinal Degeneration - metabolism
Retinal Degeneration - physiopathology
Retinal ganglion cells
Retinal Ganglion Cells - metabolism
Rodents
Signal Transduction
Staining
Time Factors
TrkA protein
TrkA receptors
title Time-Dependent Nerve Growth Factor Signaling Changes in the Rat Retina During Optic Nerve Crush-Induced Degeneration of Retinal Ganglion Cells
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