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Spinal Cord Injury ll: Pathophysiology

Spinal Cord Injury ll: Pathophysiology

Spinal cord injury progresses through two interconnected phases: primary injury and secondary injury.Primary InjuryPrimary injury happens at the moment of trauma and involves immediate mechanical damage to the spinal cord.Compression happens when broken vertebrae, herniated discs, or accumulating blood (such as a hematoma) press directly against the spinal cord, distorting its normal shape and function. In cases of contusion, the cord is bruised by a blunt force (like penetrating injuries or...

Secondary Spinal Cord Injury llI: Pathophysiology

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...

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Related Experiment Video

Updated: May 9, 2026

Synergetic Use of Neural Precursor Cells and Self-assembling Peptides in Experimental Cervical Spinal Cord Injury

Synergetic Use of Neural Precursor Cells and Self-assembling Peptides in Experimental Cervical Spinal Cord Injury

Published on: February 23, 2015

Exosome-Loaded Bioscaffolds for Spinal Cord Injuries: A Review.

Ruilin Chen^1,2, Jian Zheng^1,2, Jie Hao²

¹School of Medicine, Nantong University, Nantong, Jiangsu Province 226001, China.

Stem Cells International

|August 7, 2025

Summary

Stem cell-derived exosomes show promise for spinal cord injury (SCI) repair. Combining exosomes with biomaterial scaffolds improves their delivery and therapeutic effect for nerve regeneration.

Keywords:

biological material exosomes inflammatory reaction neural repair spinal cord injury stem cells

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Published on: November 3, 2017

Area of Science:

Biomedical Engineering
Regenerative Medicine
Neuroscience

Background:

Exosomes are cell-derived vesicles crucial for intercellular communication.
Their composition, similar to human tissues, minimizes immune rejection.
Exosomes can either promote or hinder nerve repair in spinal cord injury (SCI) depending on origin and content.

Purpose of the Study:

To review current research on stem cell-derived exosomes and biomaterials for SCI treatment.
To explore the synergistic potential of combining exosomes with biomaterial scaffolds.
To address challenges and future directions in this therapeutic approach.

Main Methods:

Review of recent scientific literature on exosomes, biomaterials, and SCI.
Analysis of exosome properties, delivery strategies, and therapeutic efficacy.
Evaluation of biomaterial scaffold integration with exosomes for enhanced SCI repair.

Main Results:

Exosome therapy for SCI faces challenges including specificity and therapeutic effect stability.
Biomaterial scaffolds enhance exosome delivery, retention, and viability at the injury site.
Combined exosome-scaffold approaches show potential for improved nerve regeneration.

Conclusions:

Stem cell-derived exosomes hold therapeutic potential for SCI.
Biomaterial scaffolds are effective in optimizing exosome delivery and therapeutic outcomes.
Further research is needed to overcome challenges and fully realize the potential of combined exosome-biomaterial therapies for SCI.