Abstract
Adult neural progenitor cells (NPC) co-grafted with fibroblasts replace cystic lesion defects and promote cell-contact-mediated axonal regeneration in the acutely injured spinal cord. Fibroblasts are required as a platform to maintain NPC within the lesion; however, they are suspected to create an inhospitable milieu for regenerating central nervous system (CNS) axons. Therefore, we thought to replace fibroblasts by primary Schwann cells, which might serve as a superior scaffold to maintain NPC within the lesion and might further enhance axon regrowth and remyelination following spinal cord injury. Adult rats underwent a cervical dorsal column transection immediately followed by transplantation of either NPC/Schwann cell or NPC/Schwann cell/fibroblast co-grafts. Animals receiving Schwann cell or fibroblast grafts alone, or Schwann cell/fibroblast co-grafts served as controls. At 3 weeks after injury/transplantation, histological analysis revealed that only fibroblast-containing grafts were able to replace the cystic lesion defect. In both co-cultures and co-grafts, Schwann cells and NPC were segregated. Almost all NPC migrated out of the graft into the adjacent host spinal cord. As a consequence, only peripheral-type myelin, but no CNS-type myelin, was detected within co-grafts containing NPC/Schwann cells. Corticospinal axon regeneration into Schwann-cell-containing co-grafts was reduced. Taken together, Schwann cells within NPC grafts contribute to remyelination. However, Schwann cells fail as a supporting platform to maintain NPC within the graft and impair CNS axon regeneration; this makes them an unfavorable candidate to support/augment NPC grafts following spinal cord injury.
Similar content being viewed by others
References
Autilio-Gambetti L, Sipple J, Sudilovsky O, Gambetti P (1982) Intermediate filaments of Schwann cells. J Neurochem 38:774–780
Bundesen LQ, Scheel TA, Bregman BS, Kromer LF (2003) Ephrin-B2 and EphB2 regulation of astrocyte-meningeal fibroblast interactions in response to spinal cord lesions in adult rats. J Neurosci 23:7789–7800
Bunge MB (1994) Transplantation of purified populations of Schwann cells into lesioned adult rat spinal cord. J Neurol 242:S36–S39
Davies JE, Tang X, Denning JW, Archibald SJ, Davies SJ (2004) Decorin suppresses neurocan, brevican, phosphacan and NG2 expression and promotes axon growth across adult rat spinal cord injuries. Eur J Neurosci 19:1226–1242
Dowsing BJ, Morrison WA, Nicola NA, Starkey GP, Bucci T, Kilpatrick TJ (1999) Leukemia inhibitory factor is an autocrine survival factor for Schwann cells. J Neurochem 73:96–104
Ghirnikar RS, Eng LF (1994) Astrocyte-Schwann cell interactions in culture. Glia 11:367–377
Griffin JW, Hoffman PN (1993) Degeneration and regeneration in the peripheral nervous system. In: Dyck PJ, Thomas PK (eds) Peripheral neuropathy. Saunders, Philadelphia, pp 361–376
Honmou O, Felts PA, Waxman SG, Kocsis JD (1996) Restoration of normal conduction properties in demyelinated spinal cord axons in the adult rat by transplantation of exogenous Schwann cells. J Neurosci 16:3199–3208
Hughes SM, Lillien LE, Raff MC, Rohrer H, Sendtner M (1988) Ciliary neurotrophic factor induces type-2 astrocyte differentiation in culture. Nature 335:70–73
Imaizumi T, Lankford KL, Kocsis JD (2000) Transplantation of olfactory ensheathing cells or Schwann cells restores rapid and secure conduction across the transected spinal cord. Brain Res 854:70–78
Jessen KR, Morgan L, Brammer M, Mirsky R (1985) Galactocerebroside is expressed by non-myelin-forming Schwann cells in situ. J Cell Biol 101:1135–1143
Keyvan-Fouladi N, Raisman G, Li Y (2005) Delayed repair of corticospinal tract lesions as an assay for the effectiveness of transplantation of Schwann cells. Glia 51:306–311
Lakatos A, Franklin RJ, Barnett SC (2000) Olfactory ensheathing cells and Schwann cells differ in their in vitro interactions with astrocytes. Glia 32:214–225
Lakatos A, Barnett SC, Franklin RJ (2003) Olfactory ensheathing cells induce less host astrocyte response and chondroitin sulphate proteoglycan expression than Schwann cells following transplantation into adult CNS white matter. Exp Neurol 184:237–246
Lankford KL, Imaizumi T, Honmou O, Kocsis JD (2002) A quantitative morphometric analysis of rat spinal cord remyelination following transplantation of allogenic Schwann cells. J Comp Neurol 443:259–274
Li Y, Raisman G (1994) Schwann cells induce sprouting in motor and sensory axons in the adult rat spinal cord. J Neurosci 14:4050–4063
Martin D, Robe P, Franzen R, Delree P, Schoenen J, Stevenaert A, Moonen G (1996) Effects of Schwann cell transplantation in a contusion model of rat spinal cord injury. J Neurosci Res 45:588–597
Menei P, Montero-Menei C, Whittemore SR, Bunge RP, Bunge MB (1998) Schwann cells genetically modified to secrete human BDNF promote enhanced axonal regrowth across transected adult rat spinal cord. Eur J Neurosci 10:607–621
Nakagaito Y, Yoshida T, Satoh M, Takeuchi M (1995) Effects of leukemia inhibitory factor on the differentiation of astrocyte progenitor cells from embryonic mouse cerebral hemispheres. Brain Res Dev Brain Res 87:220–223
Pearse DD, Marcillo AE, Oudega M, Lynch MP, Wood PM, Bunge MB (2004) Transplantation of Schwann cells and olfactory ensheathing glia after spinal cord injury: does pretreatment with methylprednisolone and interleukin-10 enhance recovery? J Neurotrauma 21:1223–1239
Pfeifer K, Vroemen M, Blesch A, Weidner N (2004) Adult neural progenitor cells provide a permissive guiding substrate for corticospinal axon growth following spinal cord injury. Eur J Neurosci 20:1695–1704
Plant GW, Bates ML, Bunge MB (2001) Inhibitory proteoglycan immunoreactivity is higher at the caudal than the rostral Schwann cell graft-transected spinal cord interface. Mol Cell Neurosci 17:471–487
Richards LJ, Kilpatrick TJ, Dutton R, Tan SS, Gearing DP, Bartlett PF, Murphy M (1996) Leukaemia inhibitory factor or related factors promote the differentiation of neuronal and astrocytic precursors within the developing murine spinal cord. Eur J Neurosci 8:291–299
Takami T, Oudega M, Bates ML, Wood PM, Kleitman N, Bunge MB (2002) Schwann cell but not olfactory ensheathing glia transplants improve hindlimb locomotor performance in the moderately contused adult rat thoracic spinal cord. J Neurosci 22:6670–6681
Tuszynski MH, Peterson DA, Ray J, Baird A, Nakahara Y, Gage FH (1994) Fibroblasts genetically modified to produce nerve growth factor induce robust neuritic ingrowth after grafting to the spinal cord. Exp Neurol 126:1–14
Tuszynski MH, Weidner N, McCormack M, Miller I, Powell H, Conner J (1998) Grafts of genetically modified Schwann cells to the spinal cord: survival, axon growth, and myelination. Cell Transplant 7:187–196
Vroemen M, Weidner N (2003) Purification of Schwann cells by selection of p75 low affinity nerve growth factor receptor expressing cells from adult peripheral nerve. J Neurosci Methods 124:135–143
Vroemen M, Aigner L, Winkler J, Weidner N (2003) Adult neural progenitor cell grafts survive after acute spinal cord injury and integrate along axonal pathways. Eur J Neurosci 18:743–751
Vroemen M, Weidner N, Blesch A (2005) Loss of gene expression in lentivirus- and retrovirus-transduced neural progenitor cells is correlated to migration and differentiation in the adult spinal cord. Exp Neurol 195:127–139
Wang GY, Hirai K, Shimada H (1992) The role of laminin, a component of Schwann cell basal lamina, in rat sciatic nerve regeneration within antiserum-treated nerve grafts. Brain Res 570:116–125
Weidner N, Blesch A, Grill RJ, Tuszynski MH (1999) Nerve growth factor-hypersecreting Schwann cell grafts augment and guide spinal cord axonal growth and remyelinate central nervous system axons in a phenotypically appropriate manner that correlates with expression of L1. J Comp Neurol 413:495–506
Xu XM, Guenard V, Kleitman N, Bunge MB (1995) Axonal regeneration into Schwann cell-seeded guidance channels grafted into transected adult rat spinal cord. J Comp Neurol 351:145–160
Acknowledgement
We thank Dr. J. Archelos for the PO antibody.
Author information
Authors and Affiliations
Corresponding author
Additional information
This work was supported by the Institute International de Recherche en Paraplégie Geneva, on behalf of an anonymous donation, and ReForM-Program, University of Regensburg, School of Medicine.
Rights and permissions
About this article
Cite this article
Vroemen, M., Caioni, M., Bogdahn, U. et al. Failure of Schwann cells as supporting cells for adult neural progenitor cell grafts in the acutely injured spinal cord. Cell Tissue Res 327, 1–13 (2007). https://doi.org/10.1007/s00441-006-0252-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00441-006-0252-y