Evaluation of Bioreactor-Cultivated Bone by Magnetic Resonance Microscopy and FTIR Microspectroscopy

Published

December 15, 2006

Author(s)

Ingrid E. Chesnick, Emiliano Fratini, Richard D. Leapman, William Landis, Naomi Eidelman, Kimberlee Potter

Abstract

We present a three-dimensional mineralizing model based on a hollow fiber bioreactor (HFBR) inoculated with primary osteoblasts isolated from embryonic chick calvaria. Using non-invasive magnetic resonance microscopy (MRM), the growth and development of the mineralized tissue around the individual fibers were monitored over a period of nine weeks. Spatial maps of the water proton MRM properties of the intact tissue, with 78 ?m resolution, were used to determine changes in tissue composition with development. Unique changes in the mineral and collagen content of the tissue were detected with high specificity by proton density (PD) and magnetization transfer ratio (MTR) maps, respectively. At the end of the growth period, the presence of a bone-like tissue was verified by histology and the formation of poorly crystalline apatite was verified by selected area electron diffraction and electron probe X-ray microanalysis.FTIR microspectroscopy confirmed the heterogeneous nature of the bone-like tissue formed. FTIR-derived phosphate mapping confirmed that those locations with the lowest PD values contained the most mineral, and FTIR-derived collagen maps confirmed that bright pixels on MTR maps corresponded to regions of high collagen content. In conclusion, the spatial mapping of tissue constituents by FTIR microspectroscopy corroborated the findings of non-invasive MRM measurements and supported the role of MRM in monitoring the bone formation process in vitro.

Citation

Bone Marrow Transplantation

Volume

40

Pub Type

Journals

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Keywords

bioreacor, bone, collagen, FTIR, magnetic, microspectroscopy, mineral, resonance microscopy

Citation

Chesnick, I. , Fratini, E. , Leapman, R. , Landis, W. , Eidelman, N. and Potter, K. (2006), Evaluation of Bioreactor-Cultivated Bone by Magnetic Resonance Microscopy and FTIR Microspectroscopy, Bone Marrow Transplantation, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852719 (Accessed February 5, 2025)