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Updated: Mar 15, 2026
Development of Combinatorial Therapeutics for Spinal Cord Injury using Stem Cell Delivery
Published on: June 7, 2024
A Coral-Derived Compound Improves Functional Recovery after Spinal Cord Injury through Its Antiapoptotic and
Chun-Hong Chen1,2, Nan-Fu Chen3,4, Chien-Wei Feng5,6
1Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan. anubis0620@gmail.com.
Background:
Our previous in vitro results demonstrated that 11-dehydrosinulariolide significantly reduced 6-hydroxydopamine-induced cytotoxicity and apoptosis in a human neuroblastoma cell line, SH-SY5Y, and suppressed the expression of inducible NO synthase (iNOS) and cyclooxygenase 2 in lipopolysaccharide-stimulated macrophage cells. The neuroprotective and anti-inflammatory effects of 11-dehydrosinulariolide may be suitable for treating spinal cord injury (SCI).
Methods:
In the present study, Wistar rats were pretreated with 11-dehydrosinulariolide or saline through intrathecal injection after a thoracic spinal cord contusion injury induced using a New York University (NYU) impactor. The apoptotic cells were assessed using the terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. The expression and localization of proinflammatory, apoptosis-associated and cell survival-related pathway proteins were examined through immunoblotting and immunohistochemistry.
Results:
11-Dehydrosinulariolide attenuated SCI-induced cell apoptosis by upregulating the antiapoptotic protein Bcl-2 and cell survival-related pathway proteins p-Akt and p-ERK, 8 h after SCI. Furthermore, the transcription factor p-CREB, which regulates Bcl-2 expression, was upregulated after 11-dehydrosinulariolide treatment. On day 7 after SCI, 11-dehydrosinulariolide exhibited an anti-inflammatory effect, attenuating SCI-induced upregulation of the inflammatory proteins iNOS and tumor necrosis factor-α. 11-Dehydrosinulariolide also induced an increase in the expression of arginase-1 and CD206, markers of M2 microglia, in the injured spinal cord on day 7 after SCI. Thus, the anti-inflammatory effect of 11-dehydrosinulariolide may be related to the promotion of an alternative pathway of microglia activation.
Conclusion:
The results show that 11-dehydrosinulariolide exerts antiapoptotic effects at 8 h after SCI and anti-inflammatory effects at 7 days after SCI. We consider that this compound may be a promising therapeutic agent for SCI.
Insights
11-dehydrosinulariolide demonstrated significant neuroprotective effects in a rat spinal cord injury model. This compound reduced apoptosis and inflammation, suggesting its potential as a therapeutic agent for spinal cord injury (SCI).
Area of Science:
- Neuroscience
- Pharmacology
- Biochemistry
Background:
- Previous in vitro studies showed 11-dehydrosinulariolide reduced cytotoxicity and apoptosis in neuronal cells.
- The compound also suppressed inflammatory markers in macrophage cells, indicating neuroprotective and anti-inflammatory potential for spinal cord injury (SCI).
Purpose of the Study:
- To investigate the therapeutic potential of 11-dehydrosinulariolide in a rat model of spinal cord injury (SCI).
- To evaluate the compound's effects on apoptosis and inflammation post-SCI.
Main Methods:
- Wistar rats with thoracic spinal cord contusion injury received intrathecal 11-dehydrosinulariolide or saline.
- Apoptosis was assessed using TUNEL assay.
- Protein expression of inflammatory, apoptosis-associated, and cell survival pathways was examined via immunoblotting and immunohistochemistry.
Main Results:
- 11-dehydrosinulariolide attenuated SCI-induced apoptosis by upregulating Bcl-2, p-Akt, and p-ERK at 8 hours post-injury.
- The compound increased p-CREB, a regulator of Bcl-2, and exhibited anti-inflammatory effects by day 7, reducing iNOS and TNF-α.
- 11-dehydrosinulariolide promoted M2 microglia activation, indicated by increased arginase-1 and CD206 expression.
Conclusions:
- 11-dehydrosinulariolide demonstrates both antiapoptotic effects (8 hours post-SCI) and anti-inflammatory effects (7 days post-SCI).
- The compound's ability to modulate apoptotic and inflammatory pathways suggests it is a promising therapeutic candidate for spinal cord injury (SCI).
