ArticleAutonomic neuroscience : basic & clinical2025
Distribution and morphology of CGRP-IR axons in flat-mounts of whole male and female mouse atria.
Article in Autonomic neuroscience : basic & clinical, 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
Due to a lack of anatomical studies utilizing female specimens, it is unclear how the nociceptive innervation of the mouse heart compares between sexes. To address this, flat-mount preparations of the left and right atria of male and female mice were immunohistochemically labeled for calcitonin gene-related peptide (CGRP, a common marker for nociceptive nerves), imaged, and digitally traced in high quality. The results show that 1) A network of CGRP-IR axons densely innervated the right and left atria. Large nerve bundle entry points and regional concentration of CGRP-IR axons were similar in both sexes. 2) The detailed distribution of CGRP-IR bundles and axons were digitized and mapped using Arivis (Zeiss) Vision4D software. The general distribution patterns in male and female mice were comparable to one another. 3) The density of CGRP-IR axons in the sinoatrial (SA) node region (Male: 0.0258 μm/μm
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