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Possible role of gap junction intercellular channels and connexin 43 in satellite glial cells (SGCs) for preservation of human spiral ganglion neurons: A comparative study with clinical implications
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Surgical Sciences, Otolaryngology and Head and Neck Surgery.
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2014 (English)In: Cell and Tissue Research, ISSN 0302-766X, E-ISSN 1432-0878, Vol. 355, no 2, 267-278 p.Article in journal (Refereed) Published
Abstract [en]

Human spiral ganglion (SG) neurons show remarkable survival properties and maintain electric excitability for a long time after complete deafness and even separation from the organ of Corti, features essential for cochlear implantation. Here, we analyze and compare the localization and distribution of gap junction (GJ) intercellular channels and connexin 43 (Cx43) in cells surrounding SG cell bodies in man and guinea pig by using transmission electron microscopy and confocal immunohistochemistry. GJs and Cx43 expression has been recognized in satellite glial cells (SGCs) in non-myelinating sensory ganglia including the human SG. In man, SG neurons can survive as mono-polar or "amputated" cells with unbroken central projections following dendrite degeneration and consolidation of the dendrite pole. Cx43-mediated GJ signaling between SGCs is believed to play a key role in this "healing" process and could explain the unique preservation of human SG neurons and the persistence of cochlear implant function.

Place, publisher, year, edition, pages
2014. Vol. 355, no 2, 267-278 p.
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-215734DOI: 10.1007/s00441-013-1735-2ISI: 000334172700003PubMedID: 24241398OAI: oai:DiVA.org:uu-215734DiVA: diva2:688282
Funder
EU, FP7, Seventh Framework Programme, 281056
Available from: 2014-01-16 Created: 2014-01-16 Last updated: 2017-12-06Bibliographically approved

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Liu, WeiRask-Andersen, Helge

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