Abstract
With advances in genetic and imaging techniques, investigating axon regeneration after spinal cord injury in vivo is becoming more common in the literature. However, there are many issues to consider when using animal models of axon regeneration, including species, strains and injury models. No single particular model suits all types of experiments and each hypothesis being tested requires careful selection of the appropriate animal model. in this review, we describe several commonly-used animal models of axon regeneration in the spinal cord and discuss their advantages and disadvantages.
Keywords: pyramidotomy, strain differences, contusion, injury models
References
- [1].Cafferty WB, McGee AW, Strittmatter SM. Axonal growth therapeutics: regeneration or sprouting or plasticity? Trends Neurosci. 2008;31:215–220. doi: 10.1016/j.tins.2008.02.004. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [2].Steward O, Zheng B, Tessier-Lavigne M. False resurrections: distinguishing regenerated from spared axons in the injured central nervous system. J Comp Neurol. 2003;459:1–8. doi: 10.1002/cne.10593. [DOI] [PubMed] [Google Scholar]
- [3].Tuszynski MH, Steward O. Concepts and methods for the study of axonal regeneration in the CNS. Neuron. 2012;74:777–791. doi: 10.1016/j.neuron.2012.05.006. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [4].Inman D, Guth L, Steward O. Genetic influences on secondary degeneration and wound healing following spinal cord injury in various strains of mice. J Comp Neurol. 2002;451:225–235. doi: 10.1002/cne.10340. [DOI] [PubMed] [Google Scholar]
- [5].Basso DM, Fisher LC, Anderson AJ, Jakeman LB, McTigue DM, Popovich PG. Basso Mouse Scale for locomotion detects differences in recovery after spinal cord injury in five common mouse strains. J Neurotrauma. 2006;23:635–659. doi: 10.1089/neu.2006.23.635. [DOI] [PubMed] [Google Scholar]
- [6].Kigerl KA, McGaughy VM, Popovich PG. Comparative analysis of lesion development and intraspinal inflammation in four strains of mice following spinal contusion injury. J Comp Neurol. 2006;494:578–594. doi: 10.1002/cne.20827. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [7].Ma M, Wei P, Wei T, Ransohoff RM, Jakeman LB. Enhanced axonal growth into a spinal cord contusion injury site in a strain of mouse (129X1/SvJ) with a diminished inflammatory response. J Comp Neurol. 2004;474:469–486. doi: 10.1002/cne.20149. [DOI] [PubMed] [Google Scholar]
- [8].Kostyk SK, Popovich PG, Stokes BT, Wei P, Jakeman LB. Robust axonal growth and a blunted macrophage response are associated with impaired functional recovery after spinal cord injury in the MRL/MpJ mouse. Neuroscience. 2008;156:498–514. doi: 10.1016/j.neuroscience.2008.08.013. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [9].Dimou L, Schnell L, Montani L, Duncan C, Simonen M, Schneider R, et al. Nogo-A-deficient mice reveal straindependent differences in axonal regeneration. J Neurosci. 2006;26:5591–5603. doi: 10.1523/JNEUROSCI.1103-06.2006. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [10].Doetschman T. Influence of genetic background on genetically engineered mouse phenotypes. Methods Mol Biol. 2009;530:423–433. doi: 10.1007/978-1-59745-471-1_23. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [11].Rossignol S, Frigon A. Recovery of locomotion after spinal cord injury: some facts and mechanisms. Annu Rev Neurosci. 2011;34:413–440. doi: 10.1146/annurev-neuro-061010-113746. [DOI] [PubMed] [Google Scholar]
- [12].Rossignol S, Bouyer L, Langlet C, Barthelemy D, Chau C, Giroux N, et al. Determinants of locomotor recovery after spinal injury in the cat. Prog Brain Res. 2004;143:163–172. doi: 10.1016/S0079-6123(03)43016-1. [DOI] [PubMed] [Google Scholar]
- [13].Lee JH, Jones CF, Okon EB, Anderson L, Tigchelaar S, Kooner P, et al. A novel porcine model of traumatic thoracic spinal cord injury. J Neurotrauma. 2013;30:142–159. doi: 10.1089/neu.2012.2386. [DOI] [PubMed] [Google Scholar]
- [14].Kuluz J, Samdani A, Benglis D, Gonzalez-Brito M, Solano JP, Ramirez MA, et al. Pediatric spinal cord injury in infant piglets: description of a new large animal model and review of the literature. J Spinal Cord Med. 2010;33:43–57. doi: 10.1080/10790268.2010.11689673. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [15].Rosenzweig ES, Courtine G, Jindrich DL, Brock JH, Ferguson AR, Strand SC, et al. Extensive spontaneous plasticity of corticospinal projections after primate spinal cord injury. Nat Neurosci. 2010;13:1505–1510. doi: 10.1038/nn.2691. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [16].Bortoff GA, Strick PL. Corticospinal terminations in two newworld primates: further evidence that corticomotoneuronal connections provide part of the neural substrate for manual dexterity. J Neurosci. 1993;13:5105–5118. doi: 10.1523/JNEUROSCI.13-12-05105.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [17].Courtine G, Bunge MB, Fawcett JW, Grossman RG, Kaas JH, Lemon R, et al. Can experiments in nonhuman primates expedite the translation of treatments for spinal cord injury in humans? Nat Med. 2007;13:561–566. doi: 10.1038/nm1595. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [18].Ethier C, Oby ER, Bauman MJ, Miller LE. Restoration of grasp following paralysis through brain-controlled stimulation of muscles. Nature. 2012;485:368–371. doi: 10.1038/nature10987. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [19].Zheng B, Lee JK, Xie F. Genetic mouse models for studying inhibitors of spinal axon regeneration. Trends Neurosci. 2006;29:640–646. doi: 10.1016/j.tins.2006.09.005. [DOI] [PubMed] [Google Scholar]
- [20].Brosamle C, Schwab ME. Cells of origin, course, and termination patterns of the ventral, uncrossed component of the mature rat corticospinal tract. J Comp Neurol. 1997;386:293–303. doi: 10.1002/(SICI)1096-9861(19970922)386:2<293::AID-CNE9>3.0.CO;2-X. [DOI] [PubMed] [Google Scholar]
- [21].Brosamle C, Schwab ME. Ipsilateral, ventral corticospinal tract of the adult rat: ultrastructure, myelination and synaptic connections. J Neurocytol. 2000;29:499–507. doi: 10.1023/A:1007297712821. [DOI] [PubMed] [Google Scholar]
- [22].Steward O, Zheng B, Ho C, Anderson K, Tessier-Lavigne M. The dorsolateral corticospinal tract in mice: an alternative route for corticospinal input to caudal segments following dorsal column lesions. J Comp Neurol. 2004;472:463–477. doi: 10.1002/cne.20090. [DOI] [PubMed] [Google Scholar]
- [23].Bareyre FM, Kerschensteiner M, Misgeld T, Sanes JR. Transgenic labeling of the corticospinal tract for monitoring axonal responses to spinal cord injury. Nat Med. 2005;11:1355–1360. doi: 10.1038/nm1331. [DOI] [PubMed] [Google Scholar]
- [24].Neumann S, Woolf CJ. Regeneration of dorsal column fibers into and beyond the lesion site following adult spinal cord injury. Neuron. 1999;23:83–91. doi: 10.1016/S0896-6273(00)80755-2. [DOI] [PubMed] [Google Scholar]
- [25].Hoffman PN. A conditioning lesion induces changes in gene expression and axonal transport that enhance regeneration by increasing the intrinsic growth state of axons. Exp Neurol. 2010;223:11–18. doi: 10.1016/j.expneurol.2009.09.006. [DOI] [PubMed] [Google Scholar]
- [26].Cao Z, Gao Y, Bryson JB, Hou J, Chaudhry N, Siddiq M, et al. The cytokine interleukin-6 is sufficient but not necessary to mimic the peripheral conditioning lesion effect on axonal growth. J Neurosci. 2006;26:5565–5573. doi: 10.1523/JNEUROSCI.0815-06.2006. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [27].Blesch A, Lu P, Tsukada S, Alto LT, Roet K, Coppola G, et al. Conditioning lesions before or after spinal cord injury recruit broad genetic mechanisms that sustain axonal regeneration: superiority to camp-mediated effects. Exp Neurol. 2012;235:162–173. doi: 10.1016/j.expneurol.2011.12.037. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [28].Stam FJ, MacGillavry HD, Armstrong NJ, de Gunst MC, Zhang Y, van Kesteren RE, et al. Identification of candidate transcriptional modulators involved in successful regeneration after nerve injury. Eur J Neurosci. 2007;25:3629–3637. doi: 10.1111/j.1460-9568.2007.05597.x. [DOI] [PubMed] [Google Scholar]
- [29].Gruner JA. A monitored contusion model of spinal cord injury in the rat. J Neurotrauma. 1992;9:123–126. doi: 10.1089/neu.1992.9.123. [DOI] [PubMed] [Google Scholar]
- [30].Wrathall JR, Pettegrew RK, Harvey F. Spinal cord contusion in the rat: production of graded, reproducible, injury groups. Exp Neurol. 1985;88:108–122. doi: 10.1016/0014-4886(85)90117-7. [DOI] [PubMed] [Google Scholar]
- [31].Stokes BT. Experimental spinal cord injury: a dynamic and verifiable injury device. J Neurotrauma. 1992;9:129–131. doi: 10.1089/neu.1992.9.129. [DOI] [PubMed] [Google Scholar]
- [32].Jakeman LB, Guan Z, Wei P, Ponnappan R, Dzwonczyk R, Popovich PG, et al. Traumatic spinal cord injury produced by controlled contusion in mouse. J Neurotrauma. 2000;17:299–319. doi: 10.1089/neu.2000.17.299. [DOI] [PubMed] [Google Scholar]
- [33].Scheff SW, Rabchevsky AG, Fugaccia I, Main JA, Lumpp JE., Jr. Experimental modeling of spinal cord injury: characterization of a force-defined injury device. J Neurotrauma. 2003;20:179–193. doi: 10.1089/08977150360547099. [DOI] [PubMed] [Google Scholar]
- [34].Nishi RA, Liu H, Chu Y, Hamamura M, Su MY, Nalcioglu O, et al. Behavioral, histological, and ex vivo magnetic resonance imaging assessment of graded contusion spinal cord injury in mice. J Neurotrauma. 2007;24:674–689. doi: 10.1089/neu.2006.0204. [DOI] [PubMed] [Google Scholar]
- [35].Noble LJ, Wrathall JR. Spinal cord contusion in the rat: morphometric analyses of alterations in the spinal cord. Exp Neurol. 1985;88:135–149. doi: 10.1016/0014-4886(85)90119-0. [DOI] [PubMed] [Google Scholar]
- [36].Li W, Cai WQ, Li CR. Repair of spinal cord injury by neural stem cells modified with BDNF gene in rats. Neurosci Bull. 2006;22:34–40. [PubMed] [Google Scholar]
- [37].Barakat DJ, Gaglani SM, Neravetla SR, Sanchez AR, Andrade CM, Pressman Y, et al. Survival, integration, and axon growth support of glia transplanted into the chronically contused spinal cord. Cell Transplant. 2005;14:225–240. doi: 10.3727/000000005783983106. [DOI] [PubMed] [Google Scholar]
- [38].Pearse DD, Pereira FC, Marcillo AE, Bates ML, Berrocal YA, Filbin MT, et al. cAMP and Schwann cells promote axonal growth and functional recovery after spinal cord injury. Nat Med. 2004;10:610–616. doi: 10.1038/nm1056. [DOI] [PubMed] [Google Scholar]
- [39].Gao M, Lu P, Bednark B, Lynam D, Conner JM, Sakamoto J, et al. Templated agarose scaffolds for the support of motor axon regeneration into sites of complete spinal cord transection. Biomaterials. 2013;34:1529–1536. doi: 10.1016/j.biomaterials.2012.10.070. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [40].Whishaw IQ, Pellis SM, Gorny B, Kolb B, Tetzlaff W. Proximal and distal impairments in rat forelimb use in reaching follow unilateral pyramidal tract lesions. Behav Brain Res. 1993;56:59–76. doi: 10.1016/0166-4328(93)90022-I. [DOI] [PubMed] [Google Scholar]
- [41].Starkey ML, Barritt AW, Yip PK, Davies M, Hamers FP, McMahon SB, et al. Assessing behavioural function following a pyramidotomy lesion of the corticospinal tract in adult mice. Expl Neurol. 2005;195:524–539. doi: 10.1016/j.expneurol.2005.06.017. [DOI] [PubMed] [Google Scholar]
- [42].Lee JK, Geoffroy CG, Chan AF, Tolentino KE, Crawford MJ, Leal MA, et al. Assessing spinal axon regeneration and sprouting in Nogo-, MAG-, and OMgp-deficient mice. Neuron. 2010;66:663–670. doi: 10.1016/j.neuron.2010.05.002. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [43].Thallmair M, Metz GA, Z’Graggen WJ, Raineteau O, Kartje GL, Schwab ME. Neurite growth inhibitors restrict plasticity and functional recovery following corticospinal tract lesions. Nat Neurosci. 1998;1:124–131. doi: 10.1038/373. [DOI] [PubMed] [Google Scholar]
- [44].Liu K, Lu Y, Lee JK, Samara R, Willenberg R, Sears-Kraxberger I, et al. PTEN deletion enhances the regenerative ability of adult corticospinal neurons. Nat Neurosci. 2010;13:1075–1081. doi: 10.1038/nn.2603. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [45].Cafferty WB, Strittmatter SM. The Nogo-Nogo receptor pathway limits a spectrum of adult CNS axonal growth. J Neurosci. 2006;26:12242–12250. doi: 10.1523/JNEUROSCI.3827-06.2006. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [46].Leong SK, Ling EA, Fan DP. Glial reaction after pyramidotomy in mice and rats. Neurodegeneration. 1995;4:403–413. doi: 10.1006/neur.1995.0049. [DOI] [PubMed] [Google Scholar]
- [47].Feng G, Mellor RH, Bernstein M, Keller-Peck C, Nguyen QT, Wallace M, et al. Imaging neuronal subsets in transgenic mice expressing multiple spectral variants of GFP. Neuron. 2000;28:41–51. doi: 10.1016/S0896-6273(00)00084-2. [DOI] [PubMed] [Google Scholar]
- [48].Kerschensteiner M, Schwab ME, Lichtman JW, Misgeld T. In vivo imaging of axonal degeneration and regeneration in the injured spinal cord. Nat Med. 2005;11:572–577. doi: 10.1038/nm1229. [DOI] [PubMed] [Google Scholar]
- [49].Di Maio A, Skuba A, Himes BT, Bhagat SL, Hyun JK, Tessler A, et al. In vivo imaging of dorsal root regeneration: rapid immobilization and presynaptic differentiation at the CNS/PNS border. J Neurosci. 2011;31:4569–4582. doi: 10.1523/JNEUROSCI.4638-10.2011. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [50].Han SB, Kim H, Skuba A, Tessler A, Ferguson T, Son YJ. Sensory Axon Regeneration: A Review from an in vivo imaging Perspective. Exp Neurobiol. 2012;21:83–93. doi: 10.5607/en.2012.21.3.83. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [51].Farrar MJ, Bernstein IM, Schlafer DH, Cleland TA, Fetcho JR, Schaffer CB. Chronic in vivo imaging in the mouse spinal cord using an implanted chamber. Nat Methods. 2012;9:297–302. doi: 10.1038/nmeth.1856. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [52].Davalos D, Lee JK, Smith WB, Brinkman B, Ellisman MH, Zheng B, et al. Stable in vivo imaging of densely populated glia, axons and blood vessels in the mouse spinal cord using two-photon microscopy. J Neurosci Methods. 2008;169:1–7. doi: 10.1016/j.jneumeth.2007.11.011. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [53].Fenrich KK, Weber P, Hocine M, Zalc M, Rougon G, Debarbieux F. Long-term in vivo imaging of normal and pathological mouse spinal cord with subcellular resolution using implanted glass windows. J Physiol. 2012;590:3665–3675. doi: 10.1113/jphysiol.2012.230532. [DOI] [PMC free article] [PubMed] [Google Scholar]
- [54].Davalos D, Akassoglou K. In vivo imaging of the mouse spinal cord using two-photon microscopy. J Vis Exp 2012: e2760. [DOI] [PMC free article] [PubMed]
- [55].Yanik MF, Cinar H, Cinar HN, Chisholm AD, Jin Y, Ben-Yakar A. Neurosurgery: functional regeneration after laser axotomy. Nature. 2004;432:822. doi: 10.1038/432822a. [DOI] [PubMed] [Google Scholar]
- [56].Chen L, Wang Z, Ghosh-Roy A, Hubert T, Yan D, O’Rourke S, et al. Axon regeneration pathways identified by systematic genetic screening in C. elegans. Neuron. 2011;71:1043–1057. doi: 10.1016/j.neuron.2011.07.009. [DOI] [PMC free article] [PubMed] [Google Scholar]