This is a collaboration between experts at UCSD, UCLA, UCSF, UC Irvine, and UC Davis to examine plasticity and regeneration in the non-human primate spinal cord. Our goal is to enhance knowledge and translational relevance of research on spinal cord injury (SCI). Given findings of the last 5 years in this model, we focus this renewal on efforts to better understand and amplify the endogenous plasticity revealed in the primate system, and to test the translation of leading potential treatments discovered in non-primate models.
Aim 1 : Examine Electrophysiological and Anatomical Mechanisms Underlying Spontaneous Forelimb Functional Improvement After Primate SCI. Like humans, monkeys exhibit spontaneous improvement (but not full recovery) after C7 hemisection, and we have identified a remarkable degree of spontaneous sprouting of the primate corticospinal projection in association with this functional improvement.
Aim 1 will examine the time course of molecular, electrophysiological and systems-level (both corticospinal and non-corticospinal) mechanisms associated with behavioral improvement.
Aims 2 and 3: Test Candidate Therapies for Promoting Recovery The primate model of SCI is important not only for testing the efficacy of therapies discovered in rodents, but also for developing methods to deliver potential treatments to the larger primate system. We have tested several therapies in the last period of this grant, and plan to focus on new, promising approaches in the current grant period that target enhancement of plasticity and recovery. We will use the same techniques as in Aim 1 to examine the functional, electrophysiological, and anatomical consequences of the following:
Aim 2 : Chronic, Intermittent Stimulation with Cortically-Implanted Electrodes to Drive Plasticity of Spared Corticospinal Projections and Intraspinal Circuits.
Aim 3 : Chase Treatment after SCI.
This research program will develop and test promising therapies for spinal cord injury in an animal model that could most closely predict human benefit. This is a collaborative endeavor between five research groups working closely together to accelerate discovery of therapies for human nervous system injury.
|Lee-Kubli, Corinne A; Ingves, Martin; Henry, Kenneth W et al. (2016) Analysis of the behavioral, cellular and molecular characteristics of pain in severe rodent spinal cord injury. Exp Neurol 278:91-104|
|Biane, Jeremy S; Takashima, Yoshio; Scanziani, Massimo et al. (2016) Thalamocortical Projections onto Behaviorally Relevant Neurons Exhibit Plasticity during Adult Motor Learning. Neuron 89:1173-9|
|Kadoya, Ken; Lu, Paul; Nguyen, Kenny et al. (2016) Spinal cord reconstitution with homologous neural grafts enables robust corticospinal regeneration. Nat Med 22:479-87|
|Salegio, Ernesto A; Bresnahan, Jacqueline C; Sparrey, Carolyn J et al. (2016) A Unilateral Cervical Spinal Cord Contusion Injury Model in Non-Human Primates (Macaca mulatta). J Neurotrauma 33:439-59|
|Friedli, Lucia; Rosenzweig, Ephron S; Barraud, Quentin et al. (2015) Pronounced species divergence in corticospinal tract reorganization and functional recovery after lateralized spinal cord injury favors primates. Sci Transl Med 7:302ra134|
|Nielson, Jessica L; Haefeli, Jenny; Salegio, Ernesto A et al. (2015) Leveraging biomedical informatics for assessing plasticity and repair in primate spinal cord injury. Brain Res 1619:124-38|
|Koffler, Jacob; Samara, Ramsey F; Rosenzweig, Ephron S (2014) Using templated agarose scaffolds to promote axon regeneration through sites of spinal cord injury. Methods Mol Biol 1162:157-65|
|Lu, Paul; Woodruff, Grace; Wang, Yaozhi et al. (2014) Long-distance axonal growth from human induced pluripotent stem cells after spinal cord injury. Neuron 83:789-96|
|Nielson, Jessica L; Guandique, Cristian F; Liu, Aiwen W et al. (2014) Development of a database for translational spinal cord injury research. J Neurotrauma 31:1789-99|
|Do, Jiun L; Bonni, Azad; Tuszynski, Mark H (2013) SnoN facilitates axonal regeneration after spinal cord injury. PLoS One 8:e71906|
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