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Updated: Sep 15, 2025
Promotion of Survival and Differentiation of Neural Stem Cells with Fibrin and Growth Factor Cocktails after Severe Spinal Cord Injury
Published on: July 27, 2014
GDF11 alleviates spinal cord injury in rats by modulating microglia polarization through Smad2/3 and MAPK/NFκB
Zihao Wang1, Yuxuan Zhang2, Wei Liu3
1Department of Orthopaedic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China; School of Clinical Medicine, Shandong University, Jinan, China; School of Clinical Medicine, Tsinghua University, Beijing 100084, China; Department of Orthopaedic, Beijing Tsinghua Changgung Hospital, No. 168, Litang Rd, Changping District, Beijing 102218, China.
Background:
Inflammatory response after spinal cord injury is an important factor in further exacerbating the extent of spinal cord injury. The polarization of microglia plays a pivotal role in the inflammatory cascade after SCI. This study investigated whether exogenous Growth Differentiation Factor 11 (GDF11) mitigates neuroinflammation and improves functional recovery by modulating M1/M2 microglial polarization, exploring its therapeutic potential for SCI.
Methods:
The protective and anti-inflammatory effect of GDF11 on LPS-induced microglia polarization was examined in vitro study. An Allen model of spinal cord injury was established to detect the therapeutic effects of GDF11. Transcriptome sequencing elucidated GDF11's downstream pathways.
Results:
GDF11 effectively improved histological and functional recovery in SCI rats. In vitro studies we found that GDF11 improved LPS-mediated M1 polarization state of microglia and was able to promote the conversion of M1 macrophages to M2 macrophages. The anti-inflammatory effects of GDF11 were associated with the activation of the TGF-β signaling pathway and the inhibition of MAPK and NF-κB activation.
Conclusion:
The present study reveals that GDF11 alleviates secondary injury after SCI by reprogramming microglial polarization, highlighting its promise as a novel therapeutic target.
Insights
Growth Differentiation Factor 11 (GDF11) reduces inflammation and improves recovery after spinal cord injury (SCI) by shifting microglia from a pro-inflammatory M1 state to an anti-inflammatory M2 state.
Area of Science:
- Neuroscience
- Immunology
- Regenerative Medicine
Background:
- Spinal cord injury (SCI) triggers inflammation, worsening damage.
- Microglial polarization is key in SCI-induced inflammatory responses.
- Investigating Growth Differentiation Factor 11 (GDF11) as a potential therapeutic for SCI.
Purpose of the Study:
- To determine if GDF11 can mitigate neuroinflammation and enhance functional recovery post-SCI.
- To explore GDF11's mechanism in modulating M1/M2 microglial polarization.
Main Methods:
- In vitro studies assessed GDF11's effect on lipopolysaccharide (LPS)-induced microglia polarization.
- An Allen model of SCI in rats was used to evaluate GDF11's therapeutic efficacy.
- Transcriptome sequencing identified GDF11's downstream signaling pathways.
Main Results:
- GDF11 treatment significantly improved histological and functional outcomes in SCI rats.
- In vitro, GDF11 reversed LPS-induced M1 polarization and promoted M1 to M2 macrophage conversion.
- GDF11's anti-inflammatory effects involved TGF-β pathway activation and MAPK/NF-κB inhibition.
Conclusions:
- GDF11 alleviates secondary injury following SCI by reprogramming microglial polarization.
- GDF11 demonstrates significant therapeutic potential as a novel target for SCI treatment.
