title: Magnetic resonance microscopy for monitoring osteogenesis in tissue-engineered construct in vitro.
abstract: Magnetic resonance microscopy (MRM) is used to monitor osteogenesis in tissue-engineered constructs. Measurements of the developing tissue's MR relaxation times (T(1) and T(2)), apparent diffusion coefficient (ADC) and elastic shear modulus were conducted over a 4-week growth period using an 11.74 T Bruker spectrometer with an imaging probe adapted for MR elastography (MRE). Both the relaxation times and the ADC show a statistically significant decrease after only one week of tissue development while the tissue stiffness increases progressively during the first two weeks of in vitro growth. The measured MR parameters are correlated with histologically monitored osteogenic tissue development. This study shows that MRM can provide quantitative data with which to characterize the growth and development of tissue-engineered bone.
authors.affiliation: Bioengineering Department, MC 063, University of Illinois at Chicago, 851 South Morgan Street, 60607-7052, USA.
authors.forename: Huihui
authors.initials: H
authors.lastname: Xu
authors.forename: Shadi F
authors.initials: SF
authors.lastname: Othman
authors.forename: Liu
authors.initials: L
authors.lastname: Hong
authors.forename: Ioana A
authors.initials: IA
authors.lastname: Peptan
authors.forename: Richard L
authors.initials: RL
authors.lastname: Magin
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D001854:Bone Marrow Cells / Q000166:cytology / Q000378:metabolism; D001842:Bone and Bones / Q000473:pathology; D049109:Cell Proliferation; D006801:Humans; D008279:Magnetic Resonance Imaging; D059630:Mesenchymal Stem Cells / Q000378:metabolism; D008853:Microscopy / Q000379:methods*; D015233:Models, Statistical; D010012:Osteogenesis; D013053:Spectrophotometry / Q000379:methods*; D013997:Time Factors; D023822:Tissue Engineering / Q000379:methods*
chemical_list: D000469:Alkaline Phosphatase