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pubmed-article:7931788pubmed:abstractTextA large number of studies have demonstrated that mechanical perturbation modulates cellular metabolism; however, the systematic characterization of the molecular and cellular transduction mechanisms underlying mechanically induced metabolic modulation has been impeded, in part, by the limitations of the mechanical device. The objective of this investigation was to develop an in vitro experimental system that would provide independent control of the spatial and temporal biaxial strain distribution imposed on a flexible transparent tissue culture membrane that permits attachment, proliferation, and maintenance of the phenotypic expression of cultured embryonic osteoblasts. Such a device would permit a systematic investigation of the cellular response to specific, independently controlled parameters of mechanical deformation. Using a prototype device designed to impose a dynamic sinusoidal spatially isotropic biaxial strain profile, we confirmed experimentally that the strain was biaxially uniform and isotropic (radial = circumferential strain over the entire culture membrane) to within 14% (SD/mean) for the range of the peak strains tested (2.3-9.4%). Additionally, the uniformity was maintained at 1 Hz for at least 5 days of continuous operation. This experimental verification of the theoretically predicted isotropic strain profile suggests that the design principle is sound. Embryonic osteoblasts cultured on the flexible substrate proliferated and exhibited a temporal pattern of phenotypic expression (extracellular matrix accumulation and mineralization) comparable with that observed on polystyrene of tissue culture grade.lld:pubmed
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pubmed-article:7931788pubmed:pagination709-19lld:pubmed
pubmed-article:7931788pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:7931788pubmed:year1994lld:pubmed
pubmed-article:7931788pubmed:articleTitleDevice for the application of a dynamic biaxially uniform and isotropic strain to a flexible cell culture membrane.lld:pubmed
pubmed-article:7931788pubmed:affiliationDepartment of Biomedical Engineering, Massachusetts General Hospital, Boston.lld:pubmed
pubmed-article:7931788pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:7931788pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
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