Abstract
Synaptic plasticity is fundamental to spinal sensitivity of bone cancer pain. Here, we have shown that excitatory synaptogenesis contributes to bone cancer pain. New synapse formation requires neurite outgrowth and an interaction between axons and dendrites, accompanied by the appositional organization of presynaptic and postsynaptic specializations. We have shown that Slit2, Robo1, and RhoA act as such cues that promote neurite outgrowth and guide the axon for synapse formation. Sarcoma inoculation induces excitatory synaptogenesis and bone cancer pain which are reversed by Slit2 knockdown but aggravated by Robo1 knockdown. Synaptogenesis of cultured neurons are inhibited by Slit2 knockdown but enhanced by Robo1 knockdown. Sarcoma implantation induces an increase in Slit2 and decreases Robo1 and RhoA, while Slit2 knockdown results in an increase of Robo1 and RhoA. These results have demonstrated a molecular mechanism of synaptogenesis in bone cancer pain.
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This work was supported by 2010 Clinical Key Disciplines Construction Grant from the Ministry of Health of the People’s Republic of China, National Natural Science Foundation of China (Nos. 81070890, 30872441, and 30901395), the Foundation of the Ministry of Education of China for Outstanding Young Teacher in University (No. 20090142120012), and Educational Commission of Hubei Province of China (No. D20142105).
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Ke, C., Gao, F., Tian, X. et al. Slit2/Robo1 Mediation of Synaptic Plasticity Contributes to Bone Cancer Pain. Mol Neurobiol 54, 295–307 (2017). https://doi.org/10.1007/s12035-015-9564-9
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DOI: https://doi.org/10.1007/s12035-015-9564-9