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Updated: Aug 5, 2025
Author Spotlight: Utilizing Infraorbital Nerve Ligation in Mice for Investigating Trigeminal Neuropathic Pain and Treatment Strategies
Published on: March 8, 2024
[Analysis of potential pathogenic factors of trigeminal neuralgia in rats]
Yue-Min Liu1, Ying Chai, Wen-Bin Wei
1Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; College of Stomatology, Shanghai Jiao Tong University; National Center for Stomatology; National Clinical Research Center for Oral Diseases; Shanghai Key Laboratory of Stomatology; Shanghai Research Institute of Stomatology. Shanghai 200011, China.
Purposes:
Transcriptomics-based analysis of key transcriptional molecules in the pathogenesis of trigeminal neuropathic pain was conducted to screen key molecules in the pathogenesis of trigeminal neuralgia.
Methods:
Rat trigeminal nerve pathological pain model, namely chronic constriction injury of distal infraorbital nerve (IoN-CCI), was constructed and animal behaviors postsurgery were observed and analyzed. Trigeminal ganglia were collected for RNA-seq transcriptomics analysis. StringTie was used to annotate and quantify genome expression. DESeq2 was applied to compare between groups with P value less than 0.05 and fold change greater than 2 times and less than 0.5 times to screen differential genes, and display them with volcano graphs and cluster graphs. ClusterProfiler software was used to perform GO function enrichment analysis of differential genes.
Results:
On the fifth postoperative day (POD5), the rat's face-grooming behavior increased to a peak; on the seventh postoperative day (POD7), the von-frey value dropped to the lowest value, indicating that the mechanical pain threshold of rats was significantly decreased. RNA-seq analysis of IoN-CCI rat ganglia found that the significantly up-regulated signaling pathways included B cell receptor signaling pathway, cell adhesion, complement and coagulation cascade pathways; significantly down-regulated pathways were related to systemic lupus erythematosus. Multiple genes among Cacna1s, Cox8b, My1, Ckm, Mylpf, Myoz1, Tnnc2 were involved in mediating the occurrence of trigeminal neuralgia.
Conclusions:
B cell receptor signaling pathway, cell adhesion, complement and coagulation cascade pathways, neuroimmune pathways are closely related to the occurrence of trigeminal neuralgia. The interaction of multiple genes among Cacna1s, Cox8b, My11, Ckm, Mylpf, Myoz1, Tnnc2 leads to the occurrence of trigeminal neuralgia.
