title: Cell-cell fusion in the nervous system: Alternative mechanisms of development, injury, and repair.
abstract: Over a century ago, the seminal work of Ramón y Cajal revealed that the nervous system is made of individual units, the neurons, which are related to each other by contiguity rather than continuity. This view overturned the idea that the nervous system was a reticulum of fibers, a rete diffusa nervosa, as proposed and defined by Camillo Golgi. Although the neuron theory has been widely confirmed in every model system studied and constitutes the basis of modern neuroscience, evidence accumulated over the years suggests that neurons, similar to other types of cells, have the potential to fuse their membranes and undergo cell-cell fusion under certain conditions. This concept adds a substantial layer to our view of the nervous system and how it functions. Here, we bring together past and more recent discoveries on multiple aspects of neuronal fusion, discussing how this cellular event is generated, and what consequences it has for our understanding of nervous system development, disease, injury, and repair.
authors.affiliation: Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia. Electronic address: r.giordanosantini@uq.edu.au.
authors.forename: Rosina
authors.initials: R
authors.lastname: Giordano-Santini
authors.affiliation: Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia.
authors.forename: Casey
authors.initials: C
authors.lastname: Linton
authors.affiliation: Clem Jones Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland, Brisbane, QLD 4072, Australia. Electronic address: m.hilliard@uq.edu.au.
authors.forename: Massimo A
authors.initials: MA
authors.lastname: Hilliard
mesh_terms: D000818:Animals; D002459:Cell Fusion; D006801:Humans; D008954:Models, Biological; D043942:Nanotubes / Q000737:chemistry; D009416:Nerve Regeneration; D009420:Nervous System / Q000196:embryology* / Q000473:pathology*; D009474:Neurons / Q000166:cytology / Q000378:metabolism
keywords: Axonal regeneration; Cell-cell fusion; Dendrite remodelling; Fusogen; Heterokaryon; Neuron theory