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. 2023 Aug 4;49(3):508–520. doi: 10.1038/s41386-023-01673-6

Fig. 5. Chemogenetic activation of CeA-projecting PBN neurons induces bilateral hypersensitivity in a modality-specific manner.

Fig. 5

A Experimental timeline of behavioral experiments. Male and female C57BL/6J mice were stereotaxically injected with AAV8-hSyn-DIO-hM3Dq into the right PBN and rAAV-hSyn-cre into the right CeA. Sciatic nerve surgery was performed 3 weeks after viral injections. Following 1 week of recovery, von Frey, Randall-Selitto, Acetone and Hargreaves tests were used to address sensitivity to tactile, deep tissue pressure, cold and heat stimulation, respectively. Mice were intraperitoneally (i.p.) injected with CNO and saline prior to behavior testing in a counterbalanced way. Paw withdrawal threshold after tactile (B, F) and pinch (C, G) stimulation, acetone response score (D, H) and withdrawal latency after heat stimulation (E, I) of the hind paw ipsilateral or contralateral to sham (BE) and cuff (FI) treatment before and 30 min after i.p. injection of CNO (green bar) or saline (gray bar). n = 7 mice per treatment for sham experiments (2 females and 5 males) and n = 6 mice per treatment for cuff experiments (1 female and 5 males). Two-way repeated measures ANOVA followed by Tukey’s multiple comparison test; ####p < 0.0001 for before and after CNO in contralateral and ipsilateral paws to sham; ****p < 0.0001; **p < 0.01 for before and after CNO in contralateral paw to cuff. Blue (BE) and red (FI) symbols represent female mice and individual mice are represented by scatter points. All data are presented as means ± SEM.