ArticleMaterials today. Bio2026
Nano-scale evidence for osteocyte network integration across bone remodeling interfaces in human bone revealed by synchrotron nanoCT.
Article in Materials today. Bio, 2026. 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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11 authors.
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Abstract
Bone remodeling is a highly regulated, hierarchical process critical for maintaining structural integrity and mineral homeostasis. At the nano-scale, the osteocytes orchestrate mechanosensing, signaling, and nutrient transport across the mineralized matrix utilizing their extensive network of cell dendrites. The lacunar-canalicular network (OLCN) houses the cellular components within the matrix. How this network integrates across bone regions formed during different remodeling cycles remains unresolved. How the cellular network is connected across interfaces between different remodeling regions or cement lines is the focus of this exploration: is the network integration merely stochastical occurrences or result of a cued, directed formation process? Using synchrotron-based nano computed tomography (nano-CT), we analyze human bone samples of 35 different patients with sub-micron resolution to characterize canalicular structures around cement lines. The results show the network's ability and affinity to integrate, and the strong influence of local tissue conditions on the degree of integration. We novelly include the structural analysis of canalicular network architecture to interpret underlying formation processes. Besides 'cross-generational' canalicular connections, we identify previously overlooked canalicular loops in newly formed bone near cement lines and interpret these as morphological indicators of a directed, adaptive search for reconnection. The study suggests a mechanism combining random outgrowth and directed progression influenced by local cues. We propose a 'cross-generational' OLCN: a deliberately integrated network that enhances tissue connectivity, functional resilience, and osteocyte survival across temporal remodeling stages. These findings advance the understanding of bone network complexity and introduce canalicular looping as a nano-structural signature of directed formation in bone network architecture.
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