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Transcriptomic Analysis of the Rat Dorsal Root Ganglion After Fracture

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Abstract

In fractures, pain signals are transmitted from the dorsal root ganglion (DRG) to the brain, and the DRG generates efferent signals to the injured bone to participate in the injury response. However, little is known about how this process occurs. We analyzed DRG transcriptome at 3, 7, 14, and 28 days after fracture. We identified the key pathways through KEGG and GO enrichment analysis. We then used IPA analysis to obtain upstream regulators and disease pathways. Finally, we compared the sequencing results with those of nerve injury to identify the unique transcriptome changes in DRG after fracture. We found that the first 14 days after fracture were the main repair response period, the 3rd day was the peak of repair activity, the 14th day was dominated by the stimulus response, and on the 28th day, the repair response had reached a plateau. ECM-receptor interaction, protein digestion and absorption, and the PI3K-Akt signaling pathway were most significantly enriched, which may be involved in repair regeneration, injury response, and pain transmission. Compared with the nerve injury model, DRG after fracture produced specific alterations related to bone repair, and the bone density function was the most widely activated bone-related function. Our results obtained some important genes and pathways in DRG after fracture, and we also summarized the main features of transcriptome function at each time point through functional annotation clustering of GO pathway, which gave us a deeper understanding of the role played by DRG in fracture.

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Data Availability

The datasets generated during the current study are available in the manuscript and supplementary information.

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Funding

This work was supported by the grants from National Natural Science Foundation of China (82072162 to X.Y. and 81971177 to B.J.), and Natural Science Foundation of Beijing, China (7192215 to X.Y.).

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Author notes

  1. Xinyi Gu and Chen Huang contributed equally to this study.

Authors and Affiliations

  1. Department of Orthopedics and Traumatology, Peking University People’s Hospital, No. 11 Xizhimen South Street, Xicheng District, Beijing, 100044, China

    Xinyi Gu, Chen Huang, Shen Wang, Jin Deng, Shuhang Guo & Xiaofeng Yin

  2. Key Laboratory of Trauma and Neural Regeneration (Peking University), Beijing, 100000, China

    Xinyi Gu, Chen Huang, Shen Wang, Jin Deng, Shuhang Guo & Xiaofeng Yin

  3. School of Artificial Intelligence and Information Technology, Nanjing University of Chinese Medicine, No. 138 Xianlin Avenue, Qixia District, Nanjing, 210023, China

    Aihaiti Sulitan, Wanjun Gu & Shaoxun Yuan

  4. Collaborative Innovation Center of Jiangsu Province of Cancer Prevention and Treatment of Chinese Medicine, Nanjing, 210023, China

    Wanjun Gu

  5. Trauma Center, Pizhou People’s Hospital, Xuzhou, Jiangsu Province, 221300, China

    Qingguo Lu

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  1. Xinyi Gu
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Contributions

X.Y. designed the study. S.Y. processed the data and plotted the figures. X.G. and C.H. instructed all experiments and drafted the manuscript. S.W., J.D., S.G. A.S., and Q.L. analyzed the data. W.G. contributed to the investigation, methodology, and edition of the manuscript.

Corresponding authors

Correspondence to Shaoxun Yuan or Xiaofeng Yin.

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Gu, X., Huang, C., Wang, S. et al. Transcriptomic Analysis of the Rat Dorsal Root Ganglion After Fracture. Mol Neurobiol 61, 1467–1478 (2024). https://doi.org/10.1007/s12035-023-03637-9

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