Abstract
Migraine is a debilitating neurological disorder with significant impact on quality of life, including social functioning. This study investigated the effects of nitroglycerin (NTG)-induced migraine in male and female mice on social behavior and neuronal activation and explored the therapeutic potential of nociceptin opioid peptide (NOP) receptor agonism. We found that acute NTG administration induced mechanical allodynia in periorbital region and paw as well as impaired social behavior in both sexes, albeit with sex-specific patterns. The NOP receptor agonist, Ro 64-6198, reversed both the allodynia and social deficits induced by NTG. The reversal of social impairment elicited by Ro 64-6198 was partially blocked by the NOP receptor antagonist, SB-612111, confirming NOP receptor-mediated action. Using TRAP2/Ai9 transgenic mice, we demonstrated that NTG induced significant neuronal activation in brain regions associated with pain and social behavior, including the anterior cingulate cortex, amygdala, hippocampus, hypothalamus, and periaqueductal gray (in female mice) as well as trigeminal nucleus caudalis (TNC) in male and female mice. Consistent with the behavioral results, NTG-induced neuronal activation in these brain regions was significantly reduced in the presence of Ro 64-6198. Our findings provide further evidence for the involvement of the NOP system in migraine pathophysiology, particularly social aspects that are indirectly pain-related symptoms, and provide a direct correlation with neuronal activation in several brain regions.

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Data availability
Data are available via Repository for Open Data “RepOD” (https://doi.org/10.18150/JCTHAV) at the Interdisciplinary Centre for Mathematical and Computational Modelling, University of Warsaw.
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Acknowledgements
We thank the Nikon Center of Excellence at the Florida Atlantic University, Stiles-Nicholson Brain Institute for the use of the microscope. In addition, we want to thank all the husbandry and veterinary staff for the care of our animal subjects at the Medical University of Lublin (Experimental Medicine Center) and the Florida Atlantic University.
Funding
This work was supported by grant from the Polish National Science Center (SONATA BIS 11 funding 2021/42/E/NZ7/00191) to KMT-D; NIH grant (R34NS121875) to AO, and DoD grant (W81XWH2110410) to LT. AM.’s internship at Florida Atlantic University was funded by SONATA BIS 11.
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All of the authors listed in this manuscript have read the final version of the manuscript. The contributions of each author are: KMT-D, AO, and LT designed the study; AM, OW-D, MM, DP, IS, D.P-M and KMT-D performed experiments; AM, KMT-D, OW-D, AO and M. Maj analyzed data. AM, KMT-D, AO and LT wrote the manuscript.
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41386_2025_2187_MOESM1_ESM.docx
Table S1 Statistical analysis for all treatments with reference to total time spent in chamber with familiar and non-familiar mice, and after sumatriptan co-injection with NTG using social test
41386_2025_2187_MOESM2_ESM.docx
Table S2 Statistical values for neuronal activation with treatment in various brain regions in male and female TRAP2/Ai9 mice
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Mudgal, A., Wronikowska-Denysiuk, O., Martinez, M. et al. Ro 64-6198, a selective NOP receptor agonist attenuates social impairments associated with NTG-induced migraine pain. Neuropsychopharmacol. (2025). https://doi.org/10.1038/s41386-025-02187-z
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DOI: https://doi.org/10.1038/s41386-025-02187-z