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• W2142034162 abstract "In Brief Study Design. Whole ovine caudal intervertebral discs with vertebral endplates were cultured under uniaxial diurnal loading for 7 days. Objectives. To establish and characterize an organ culture system for intervertebral discs, in which disc cells may be “maintained” in their native three-dimensional environment under load. Summary of Background Data. In vitro culturing of entire discs with preserved biologic and structural integrity would be a useful model to study the effects of nutrition and mechanical loading. Methods. To maintain endplate permeability, sheep were systemically anticoagulated before death and their caudal vasculature was evacuated with saline postmortem. The first 4 caudal discs were explanted with their adjacent endplates and cultured in bioreactors under uniaxial diurnal loading (0.2 MPa for 8 hours and 0.8 MPa for 16 hours) for 4 or 7 days. Solute transport into the center of the disc was measured after 4 days of culture using a low molecular weight fluorescent marker. Cell viability, glycosaminoglycan synthesis rate, and gene expression profile were measured after 7 days of culture and compared with fresh tissue. Results. Fluorescent images showed that solutes could diffuse into the disc under both static and diurnal loading, but penetration through the endplate increased with diurnal loading. Cell viability and glycosaminoglycan synthesis rates remained unchanged after 7 days of culture. Expression of catabolic genes was significantly up-regulated, whereas anabolic genes tended to be down-regulated after 7 days. Conclusions. With this novel preparation and culturing technique, endplate permeability could be maintained, which allowed culturing of intact disc explants with endplates for up to 7 days. A system was developed in which intervertebral discs with vertebral endplates could be cultured under loading. It was demonstrated that moderate size solutes diffuse into the disc and that cell viability and glycosaminoglycan synthesis rates remained unchanged but that expression of catabolic genes was up-regulated." @default.
• W2142034162 created "2016-06-24" @default.
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• W2142034162 date "2006-11-01" @default.
• W2142034162 modified "2023-10-03" @default.
• W2142034162 title "An In Vitro Organ Culturing System for Intervertebral Disc Explants With Vertebral Endplates" @default.
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• W2142034162 doi "https://doi.org/10.1097/01.brs.0000244620.15386.df" @default.
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