Pyrrole Plasma Polymer-Coated Fibrillar Scaffold Implant: Pilot Study in Rat Spinal Cord Transection with MRI

Osorio-Londoño, Diana María; Sanchez-Morales, Gloria S.; Garcia-Garcia, Gustavo; Morales-Guadarrama, Axayácatl; Olayo, Roberto

doi:10.1109/embc46164.2021.9630447

Cited by 1 publication

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“…A 15% v / v PLA solution was pumped through a nozzle connected to a 20 kV high-voltage electric field source. The fibers were collected on a grounded plate, generating a porous scaffold, which was folded to form 3 × 3 × 1 mm rectangular-shaped constructs, as previously reported [ 49 ]. The constructs were placed inside a glass reactor between two electrodes connected to a radiofrequency generator.…”

Section: Methodsmentioning

confidence: 99%

Improved Recovery of Complete Spinal Cord Transection by a Plasma-Modified Fibrillar Scaffold

Osorio-Londoño,

Heras-Romero,

Tovar-y-Romo

et al. 2024

Polymers

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Complete spinal cord injury causes an irreversible disruption in the central nervous system, leading to motor, sensory, and autonomic function loss, and a secondary injury that constitutes a physical barrier preventing tissue repair. Tissue engineering scaffolds are presented as a permissive platform for cell migration and the reconnection of spared tissue. Iodine-doped plasma pyrrole polymer (pPPy-I), a neuroprotective material, was applied to polylactic acid (PLA) fibers and implanted in a rat complete spinal cord transection injury model to evaluate whether the resulting composite implants provided structural and functional recovery, using magnetic resonance (MR) imaging, diffusion tensor imaging and tractography, magnetic resonance spectroscopy, locomotion analysis, histology, and immunofluorescence. In vivo, MR studies evidenced a tissue response to the implant, demonstrating that the fibrillar composite scaffold moderated the structural effects of secondary damage by providing mechanical stability to the lesion core, tissue reconstruction, and significant motor recovery. Histologic analyses demonstrated that the composite scaffold provided a permissive environment for cell attachment and neural tissue guidance over the fibers, reducing cyst formation. These results supply evidence that pPPy-I enhanced the properties of PLA fibrillar scaffolds as a promising treatment for spinal cord injury recovery.

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Section: Methodsmentioning

confidence: 99%