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Evaluation of olfactory ensheathing and schwann cells after implantation into a dorsal injury of adult rat spinal cord

Evaluation of olfactory ensheathing and schwann cells after implantation into a dorsal injury of adult rat spinal cord
Evaluation of olfactory ensheathing and schwann cells after implantation into a dorsal injury of adult rat spinal cord

Olfactory ensheathing cells (OECs) and Schwann cells (SCs) obtained from adult transgenic rats expressing alkaline phosphatase (AP) were studied following implantation into intact spinal cord and after dorsal column crush (DCC) injury, either within the lesion or near the lesion borders. We observed no evidence of migration of AP OECs or AP SCs after lesion site injections, with most cells remaining in or nearby the injection/lesion site. Acute injection of either cell type outside of the lesion site resulted in the presence of cells in the lesion even two hours after injection. However, after a 2-week delay between DCC injury and cell injection, only OECs injected 2.5-mm outside of a DCC lesion entered the lesion, while SCs did not pass a region of increased astroglial immunoreactivity. GFAP-immunoreactivity also revealed differences in the astroglial scar at the lesion border with openings apparent in this region only in the OEC group. SCs induced greater ingrowth of CGRP-positive axons within the lesion, two weeks post-injury. Equivalent numbers of GAP-43-positive axons grew within the lesion after SC or OEC implantation. These findings show that, although there is no active migration for either cell type, both OECs and SCs are able to support axonal regrowth and/or sprouting into the lesion. The openings in the astroglial boundary at the lesion site may give OECs a potential advantage over SCs in promoting axonal growth through the astroglial scar.

0897-7151
1773-1792
Andrews, Melissa R.
ae987a2f-878e-4ae3-a7a3-a7170712096c
Stelzner, Dennis J.
53e95c3a-99ba-4aef-9297-ea55c854f1c9
Andrews, Melissa R.
ae987a2f-878e-4ae3-a7a3-a7170712096c
Stelzner, Dennis J.
53e95c3a-99ba-4aef-9297-ea55c854f1c9

Andrews, Melissa R. and Stelzner, Dennis J. (2007) Evaluation of olfactory ensheathing and schwann cells after implantation into a dorsal injury of adult rat spinal cord. Journal of Neurotrauma, 24 (11), 1773-1792. (doi:10.1089/neu.2007.0353).

Record type: Article

Abstract

Olfactory ensheathing cells (OECs) and Schwann cells (SCs) obtained from adult transgenic rats expressing alkaline phosphatase (AP) were studied following implantation into intact spinal cord and after dorsal column crush (DCC) injury, either within the lesion or near the lesion borders. We observed no evidence of migration of AP OECs or AP SCs after lesion site injections, with most cells remaining in or nearby the injection/lesion site. Acute injection of either cell type outside of the lesion site resulted in the presence of cells in the lesion even two hours after injection. However, after a 2-week delay between DCC injury and cell injection, only OECs injected 2.5-mm outside of a DCC lesion entered the lesion, while SCs did not pass a region of increased astroglial immunoreactivity. GFAP-immunoreactivity also revealed differences in the astroglial scar at the lesion border with openings apparent in this region only in the OEC group. SCs induced greater ingrowth of CGRP-positive axons within the lesion, two weeks post-injury. Equivalent numbers of GAP-43-positive axons grew within the lesion after SC or OEC implantation. These findings show that, although there is no active migration for either cell type, both OECs and SCs are able to support axonal regrowth and/or sprouting into the lesion. The openings in the astroglial boundary at the lesion site may give OECs a potential advantage over SCs in promoting axonal growth through the astroglial scar.

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Published date: 14 November 2007
Organisations: Biomedicine

Identifiers

Local EPrints ID: 404996
URI: https://eprints.soton.ac.uk/id/eprint/404996
ISSN: 0897-7151
PURE UUID: 10fd455e-ff4c-424b-97da-7988eeac09eb
ORCID for Melissa R. Andrews: ORCID iD orcid.org/0000-0001-5960-5619

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Date deposited: 26 Jan 2017 16:45
Last modified: 06 Jun 2018 12:14

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