3D imaging reveals changes in the neurovascular architecture of the murine calvarium with aging
Year: 2025
Type: article
Abstract: Calvarial nerves, along with vasculature, influence skull formation during development and following injury, but it remains unclear how calvarial nerves are spatially distributed during postnatal growth and aging. Studying the spatial distribution of nerves in the skull remains a challenge due to a lack of methods to quantify 3D structures in intact bone. To visualize calvarial 3D neurovascular architecture, we imaged nerves and endothelial cells with lightsheet microscopy. We employed machine-learning-based segmentation to facilitate high-resolution characterization from post-natal day 0 (P0) to 80 weeks. We found that TUBB3 + nerve density decreased with aging with the frontal bone demonstrating earlier onset age-related nerve loss than the parietal bone. In addition, nerves in the periosteum and dura mater exhibited similar yet distinct temporal patterns of nerve growth and loss. While no difference was observed in TUBB3 + nerves during skeletal maturation (P0 → 12 weeks), we did observe an increase in the volume of unmyelinated nerves in the dura mater. Regarding calvarial vasculature, larger CD31 hi Emcn - vessel fraction increased with aging, while CD31 hi Emcn hi vessel fraction was reduced. Throughout all ages, calvarial nerves maintained a preferential spatial association with CD31 hi Emcn hi vessels, however, this association decreased with aging. Additionally, we used a model of Apert syndrome to explore the impact of suture-related disease on neurovascular architecture. Collectively, this 3D, spatiotemporal characterization of calvarial nerves throughout the lifespan and provides new insights into age-induced neurovascular architecture.
Source: Bone Research
Language: English
Subfield: Genetics
Domain: Life Sciences
Open Access status: gold
Estimated APC paid: $3,405
Awards: G1404010663, G1522091091, G1934288461, G2728721924, G2862279512, Oxygen-eluting scaffolds for cranial bone regeneration, A Wireless Multi-function Microscope for Lifetime Imaging of the Brain Tumor Vasculome, G4864644826, G6474446870, G6599542366, G7271724001, Image-based Systems Biology of Vascular Co-option in Brain Tumors
OpenAlex ID: W4407813358