Trabecular bone organoid model for studying the regulation of localized bone remodeling.

Trabecular bone organoid model for studying the regulation of localized bone remodeling.
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DOI:
10.1126/sciadv.abd6495
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发表时间:
2021-01
期刊:
影响因子:
13.6
通讯作者:
Lee J
Lee J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Park Y;Cheong E;Kwak JG;Carpenter R;Shim JH;Lee J

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A tissue-engineered model of the trabecular bone microenvironment elucidates spatiotemporal aspects of bone remodeling processes. Trabecular bone maintains physiological homeostasis and consistent structure and mass through repeated cycles of bone remodeling by means of tightly localized regulation. The molecular and cellular processes that regulate localized bone remodeling are poorly understood because of a lack of relevant experimental models. A tissue-engineered model is described here that reproduces bone tissue complexity and bone remodeling processes with high fidelity and control. An osteoid-inspired biomaterial—demineralized bone paper—directs osteoblasts to deposit structural mineralized bone tissue and subsequently acquire the resting-state bone lining cell phenotype. These cells activate and shift their secretory profile to induce osteoclastogenesis in response to chemical stimulation. Quantitative spatial mapping of cellular activities in resting and activated bone surface coculture showed that the resting-state bone lining cell network actively directs localized bone remodeling by means of paracrine signaling and cell-to-cell contact. This model may facilitate further investigation of trabecular bone niche biology.
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