ArticlebioRxiv : the preprint server for biology2025
The role of amygdala calcitonin gene-related peptide receptors on the development of persistent bladder pain in mice.
Article in bioRxiv : the preprint server for biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Bladder pain significantly impacts millions worldwide, severely affecting their quality of life and posing a major clinical challenge. Understanding the mechanisms underlying persistent bladder pain is critical for developing better therapeutic strategies. In this study, we investigate the effects of cyclophosphamide (CYP)-induced persistent bladder sensitization to explore the lateralized contribution of amygdala calcitonin gene-related peptide receptors (CGRP-Rs) on pain-like changes in mice. We demonstrate that CYP induces hypersensitivity lasting up to 14 days post-injury (DPI) in the urinary bladder distention assay and up to 21 DPI when assessing abdominal mechanical sensitivity. Despite persistent pain-like changes, no significant bladder histological changes were observed. Based on previous findings that CGRP signaling from the parabrachial nucleus contributes to central amygdala (CeA) lateralization, we hypothesized that CGRP-Rs play a key role in driving visceral bladder pain-related hemispherical differences. We show that inhibiting CGRP-R activity with the antagonist CGRP
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