dc.contributor.advisor | Yeh, Alvin T | |
dc.creator | Bai, Yuqiang | |
dc.date.accessioned | 2015-01-09T20:26:23Z | |
dc.date.available | 2015-01-09T20:26:23Z | |
dc.date.created | 2014-05 | |
dc.date.issued | 2014-04-28 | |
dc.date.submitted | May 2014 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/152611 | |
dc.description.abstract | To better understand the relationships between mechanical stimuli and
cellular responses, we developed a 3D tissue bioreactor coupling to both a biaxial
mechanical testing platform and a stage for multimodal microscopy. Fibroblast
seeded cruciform fibrin gels were investigated. A multimodal nonlinear optical
microscopy-optical coherence microscopy (NLOM-OCM) system was developed
to delineate relative spatial distributions of original fibrin, deposited collagen and
fibroblasts non-invasively. Serial in-culture mechanical testing platform was also
applied to track the evolution of bulk mechanical properties under sterile
conditions. Wall stress depends on sample thickness and our multimodal imaging
system measured evolving construct thickness as a function of mechanical stretch
during biaxial tests. Through one month culture, cell and deposited collagen
randomly distributed in non-stretched constructs. While under stretched condition,
cell and deposited collagen fibers, which aligned with cell bodies, appeared
preferentially parallel with principal stretch. Surprisingly both non-stretched and
stretched constructs showed isotropic mechanical properties with increasing
stiffness with culture time. In summary, our biaxial bioreactor system integrating
both NLOM-OCM and mechanical testing provided complementary
microstructural information and mechanical properties and thus may broaden
fundamental understanding of soft tissue mechanics and mechanobiology. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.subject | biomechanics | en |
dc.subject | biomedical optics | en |
dc.subject | tissue engineering | en |
dc.title | Characterization of Engineered Tissue by Multimodal Optical Imaging and Biaxial Mechanical Testing | en |
dc.type | Thesis | en |
thesis.degree.department | Biomedical Engineering | en |
thesis.degree.discipline | Biomedical Engineering | en |
thesis.degree.grantor | Texas A & M University | en |
thesis.degree.name | Doctor of Philosophy | en |
thesis.degree.level | Doctoral | en |
dc.contributor.committeeMember | Bayles, Kayla J | |
dc.contributor.committeeMember | Hwang, Wonmuk | |
dc.contributor.committeeMember | Meissner, Kenith | |
dc.type.material | text | en |
dc.date.updated | 2015-01-09T20:26:23Z | |
local.etdauthor.orcid | 0000-0002-5262-884X | |