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Davidson EH, Reformat DD, Allori A, Canizares O, Janelle Wagner I, Saadeh PB, Warren SM. Flow perfusion maintains ex vivo bone viability: a novel model for bone biology research. J Tissue Eng Regen Med 2011; 6:769-76. [PMID: 22052846 DOI: 10.1002/term.478] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 12/29/2010] [Accepted: 07/05/2011] [Indexed: 11/11/2022]
Abstract
Encased in lacunae, osteocytes receive nutrition and biomechanical signals through the lacunocanalicular system. We have developed a novel flow-perfusion bioreactor designed to support lacunocanalicular fluid flow. We hypothesize that ex vivo fluid flow can maintain endochondral bone viability and, ultimately, serve as a novel model to study bone biology in vitro. Sprague-Dawley rat femurs were harvested, stripped of soft tissue, loaded into a custom-designed bioreactor and perfused with osteogenic culture medium. After 14 days of flow-perfusion or static culture, the bones were harvested, fixed, decalcified, embedded, sectioned and stained with haematoxylin and eosin. Fresh long bone samples were similarly processed for comparison. Osteocyte viability and function were also evaluated, using thiazolyl blue tetrazolium bromide (MTT), fluorospectrophotometric DNA quantification, alkaline phosphatase (ALP) colorimetric assay and fluorochrome labelling of mineralizing surfaces. All samples remained free of infection throughout the study period. After 14 days of flow perfusion, histological analysis showed normal-appearing bony architecture, with 72% of lacunae being osteocyte-filled compared with 93% in freshly harvested samples and only 36% in static samples. MTT staining and assay confirmed osteocyte viability in the flow-perfusion samples as well as in fresh samples. DNA quantification demonstrated DNA to be preserved in flow-perfused samples when compared with freshly harvested samples. ALP activity in flow-perfusion explants was upregulated compared with fresh and static samples. Fluorochrome-labelled mineralizing surfaces were seen throughout the explanted flow-perfused samples. This is the first demonstration that flow perfusion provides adequate chemotransportation to explanted murine endochondal bones.
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Affiliation(s)
- Edward H Davidson
- Institute of Reconstructive Plastic Surgery, New York University School of Medicine, 560 First Avenue, New York, NY, 10016, USA
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David V, Guignandon A, Martin A, Malaval L, Lafage-Proust MH, Rattner A, Mann V, Noble B, Jones DB, Vico L. Ex Vivo Bone Formation in Bovine Trabecular Bone Cultured in a Dynamic 3D Bioreactor Is Enhanced by Compressive Mechanical Strain. Tissue Eng Part A 2008; 14:117-26. [DOI: 10.1089/ten.a.2007.0051] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Affiliation(s)
- Valentin David
- INSERM U890, Laboratoire de Biologie du Tissu Osseux, IFR143, IFRESIS, Université Jean Monnet, St. Etienne, F-42023, France
- Present address: The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas
| | - Alain Guignandon
- INSERM U890, Laboratoire de Biologie du Tissu Osseux, IFR143, IFRESIS, Université Jean Monnet, St. Etienne, F-42023, France
| | - Aline Martin
- INSERM U890, Laboratoire de Biologie du Tissu Osseux, IFR143, IFRESIS, Université Jean Monnet, St. Etienne, F-42023, France
- Present address: The Kidney Institute, University of Kansas Medical Center, Kansas City, Kansas
| | - Luc Malaval
- INSERM U890, Laboratoire de Biologie du Tissu Osseux, IFR143, IFRESIS, Université Jean Monnet, St. Etienne, F-42023, France
| | - Marie-Hélène Lafage-Proust
- INSERM U890, Laboratoire de Biologie du Tissu Osseux, IFR143, IFRESIS, Université Jean Monnet, St. Etienne, F-42023, France
| | - Aline Rattner
- INSERM U890, Laboratoire de Biologie du Tissu Osseux, IFR143, IFRESIS, Université Jean Monnet, St. Etienne, F-42023, France
| | - Val Mann
- Scottish Mechanotransduction Consortium, Medical School, University of Edinburgh, Edinburgh, United Kingdom
| | - Brendon Noble
- Scottish Mechanotransduction Consortium, Medical School, University of Edinburgh, Edinburgh, United Kingdom
| | - David B. Jones
- Department of Experimental Orthopaedics and Biomechanics, Philipps University, Marburg, Germany
| | - Laurence Vico
- INSERM U890, Laboratoire de Biologie du Tissu Osseux, IFR143, IFRESIS, Université Jean Monnet, St. Etienne, F-42023, France
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