Name: imaging-guided bioreactor for generating bioengineered airway tissue
Uploaded: 2022-04-06T13:50:00
Description: Watch this Scientific Journal Video about Imaging-Guided Bioreactor for Generating Bioengineered Airway Tissue at JoVE.com

This research has been supported in part by the American Thoracic Society Foundation Research Program, the New Jersey Health Foundation, and the National Science Foundation (CAREER Award 2143620) to J.K.; and the National Institutes of Health (P41 EB027062) to G.V.N.

The animal tissue protocol below has been approved by the animal welfare guideline and regulations of the Institute for Animal Care and Use Committee (IACUC) at Stevens Institute of Technology, and it complies with the National Institutes of Health (NIH) guidelines for the use of experimental animals.
1. Design and construction of imaging-guided rat trachea bioreactor
<ol>
	<li>Designing and fabrication of rat trachea bioreactor
	<ol>
		<li>Create a computer-aided design (CA...

<ol>
	<li>Rackley, C. R., Stripp, B. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Building+and+maintaining+the+epithelium+of+the+lung.">Building and maintaining the epithelium of the lung.</a> The Journal of Clinical Investigation. 122 (8), 2724-2730 (2012).</li><li>Rayner, R. E., Makena, P., Prasad, G. L., Cormet-Boyaka, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optimization+of+Normal+Human+Bronchial+Epithelial+(NHBE)+cell+3D+cultures+for+in+vitro+lung+model+studies.">Optimization of Normal Human Bronchial Epithelial (NHBE) cell 3D cultures for in vitro lung model studies.</a> Scientific Reports. 9 (1), 500 (2019).</li><li>Gohy, S., Hupin, C., Ladjemi, M. Z., Hox, V., Pilette, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Key+role+of+the+epithelium+in+chronic+upper+airways+diseases.">Key role of the epithelium in chronic upper airways diseases.</a> Clinical and Experimental Allergy. 50 (2), 135-146 (2020).</li><li>Ganesan, S., Comstock, A. T., Sajjan, U. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Barrier+function+of+airway+tract+epithelium.">Barrier function of airway tract epithelium.</a> Tissue Barriers. 1 (4), 24997 (2013).</li><li>De Rose, V., Molloy, K., Gohy, S., Pilette, C., Greene, C. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Airway+epithelium+dysfunction+in+cystic+fibrosis+and+COPD.">Airway epithelium dysfunction in cystic fibrosis and COPD.</a> Mediators of Inflammation. 2018, 1309746 (2018).</li><li>Horani, A., Ferkol, T. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Advances+in+the+genetics+of+primary+ciliary+dyskinesia:+Clinical+implications.">Advances in the genetics of primary ciliary dyskinesia: Clinical implications.</a> Chest. 154 (3), 645-652 (2018).</li><li>Berical, A., Lee, R. E., Randell, S. H., Hawkins, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Challenges+facing+airway+epithelial+cell-based+therapy+for+cystic+fibrosis.">Challenges facing airway epithelial cell-based therapy for cystic fibrosis.</a> Frontiers in Pharmacology. 10, 74 (2019).</li><li>Shrestha, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Lung-on-a-chip:+the+future+of+respiratory+disease+models+and+pharmacological+studies.">Lung-on-a-chip: the future of respiratory disease models and pharmacological studies.</a> Critical Reviews in Biotechnology. 40 (2), 213-230 (2020).</li><li>Benam, K. H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Small+airway-on-a-chip+enables+analysis+of+human+lung+inflammation+and+drug+responses+in+vitro.">Small airway-on-a-chip enables analysis of human lung inflammation and drug responses in vitro.</a> Nature Methods. 13 (2), 151-157 (2016).</li><li>Plebani, R., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Modeling+pulmonary+cystic+fibrosis+in+a+human+lung+airway-on-a-chip.">Modeling pulmonary cystic fibrosis in a human lung airway-on-a-chip.</a> Journal of Cystic Fibrosis. , (2021).</li><li>Griffith, L. G., Swartz, M. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Capturing+complex+3D+tissue+physiology+in+vitro.">Capturing complex 3D tissue physiology in vitro.</a> Nature Reviews Molecular Cell Biology. 7 (3), 211-224 (2006).</li><li>Gilpin, S. E., Wagner, D. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Acellular+human+lung+scaffolds+to+model+lung+disease+and+tissue+regeneration.">Acellular human lung scaffolds to model lung disease and tissue regeneration.</a> European Respiratory Review. 27 (148), 180021 (2018).</li><li>Badylak, S. F., Taylor, D., Uygun, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Whole-organ+tissue+engineering:+decellularization+and+recellularization+of+three-dimensional+matrix+scaffolds.">Whole-organ tissue engineering: decellularization and recellularization of three-dimensional matrix scaffolds.</a> Annual Review of Biomedical Engineering. 13, 27-53 (2011).</li><li>Gilpin, S. E., Charest, J. M., Ren, X., Ott, H. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bioengineering+lungs+for+transplantation.">Bioengineering lungs for transplantation.</a> Thoracic Surgery Clinics. 26 (2), 163-171 (2016).</li><li>Calle, E. A., Leiby, K. L., Raredon, M. B., Niklason, L. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Lung+regeneration:+steps+toward+clinical+implementation+and+use.">Lung regeneration: steps toward clinical implementation and use.</a> Current Opinion in Anaesthesiology. 30 (1), 23-29 (2017).</li><li>Planchard, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Engineering Design with SOLIDWORKS 2022: A Step-by-Step Project Based Approach Utilizing 3D Solid Modeling. , (2022).</li><li>Coward, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> A Beginner's Guide to 3D Modeling: A Guide to Autodesk Fusion 360. , (2019).</li><li>Meza, G., Carpio, C. D., Vinces, N., Klusmann, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> 2018 IEEE XXV International Conference on Electronics, Electrical Engineering and Computing (INTERCON. , 1-4 (2018).</li><li>Crapo, P. M., Gilbert, T. W., Badylak, S. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=An+overview+of+tissue+and+whole+organ+decellularization+processes.">An overview of tissue and whole organ decellularization processes.</a> Biomaterials. 32 (12), 3233-3243 (2011).</li><li>Tchoukalova, Y. D., Hintze, J. M., Hayden, R. E., Lott, D. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tracheal+decellularization+using+a+combination+of+chemical,+physical+and+bioreactor+methods.">Tracheal decellularization using a combination of chemical, physical and bioreactor methods.</a> The International Journal of Artificial Organs. 41 (2), 100-107 (2017).</li><li>Partington, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Biochemical+changes+caused+by+decellularization+may+compromise+mechanical+integrity+of+tracheal+scaffolds.">Biochemical changes caused by decellularization may compromise mechanical integrity of tracheal scaffolds.</a> Acta Biomaterialia. 9 (2), 5251-5261 (2013).</li><li>Balestrini, J. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Production+of+decellularized+porcine+lung+scaffolds+for+use+in+tissue+engineering.">Production of decellularized porcine lung scaffolds for use in tissue engineering.</a> Integrative Biology. 7 (12), 1598-1610 (2015).</li><li>Taylor, D. A., Sampaio, L. C., Ferdous, Z., Gobin, A. S., Taite, L. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Decellularized+matrices+in+regenerative+medicine.">Decellularized matrices in regenerative medicine.</a> Acta Biomaterialia. 74, 74-89 (2018).</li><li>Huang, S. X., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Efficient+generation+of+lung+and+airway+epithelial+cells+from+human+pluripotent+stem+cells.">Efficient generation of lung and airway epithelial cells from human pluripotent stem cells.</a> Nature Biotechnology. 32 (1), 84-91 (2014).</li><li>Huang, S. X. L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+in+vitro+generation+of+lung+and+airway+progenitor+cells+from+human+pluripotent+stem+cells.">The in vitro generation of lung and airway progenitor cells from human pluripotent stem cells.</a> Nature Protocols. 10 (3), 413-425 (2015).</li><li>Kim, J., O'Neill, J. D., Dorrello, N. V., Bacchetta, M., Vunjak-Novakovic, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Targeted+delivery+of+liquid+microvolumes+into+the+lung.">Targeted delivery of liquid microvolumes into the lung.</a> Proceedings of the National Academy of Sciences of the United States of America. 112 (37), 11530-11535 (2015).</li><li>Kim, J., O'Neill, J. D., Vunjak-Novakovic, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Rapid+retraction+of+microvolume+aqueous+plugs+traveling+in+a+wettable+capillary.">Rapid retraction of microvolume aqueous plugs traveling in a wettable capillary.</a> Applied Physics Letters. 107 (14), 144101 (2015).</li><li>O'Neill, J. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Decellularization+of+human+and+porcine+lung+tissues+for+pulmonary+tissue+engineering.">Decellularization of human and porcine lung tissues for pulmonary tissue engineering.</a> The Annals of Thoracic Surgery. 96 (3), 1046-1056 (2013).</li><li>Sengyoku, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sodium+hydroxide+based+non-detergent+decellularizing+solution+for+rat+lung.">Sodium hydroxide based non-detergent decellularizing solution for rat lung.</a> Organogenesis. 14 (2), 94-106 (2018).</li><li>Walters, M. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Generation+of+a+human+airway+epithelium+derived+basal+cell+line+with+multipotent+differentiation+capacity.">Generation of a human airway epithelium derived basal cell line with multipotent differentiation capacity.</a> Respiratory Research. 14 (1), 135 (2013).</li><li>O'Neill, J. D., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cross-circulation+for+extracorporeal+support+and+recovery+of+the+lung.">Cross-circulation for extracorporeal support and recovery of the lung.</a> Nature Biomedical Engineering. 1 (3), 0037 (2017).</li><li>Guenthart, B. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Regeneration+of+severely+damaged+lungs+using+an+interventional+cross-circulation+platform.">Regeneration of severely damaged lungs using an interventional cross-circulation platform.</a> Nature Communications. 10 (1), 1985 (2019).</li><li>Chen, J., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Non-destructive+vacuum-assisted+measurement+of+lung+elastic+modulus.">Non-destructive vacuum-assisted measurement of lung elastic modulus.</a> Acta Biomaterialia. 131, 370-380 (2021).</li><li>Dorrello, N. V., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Functional+vascularized+lung+grafts+for+lung+bioengineering.">Functional vascularized lung grafts for lung bioengineering.</a> Science Advances. 3 (8), 1700521 (2017).</li></ol>

In this work, we created an imaging-guided bioreactor that can allow (i) monitoring of the trachea lumen in situ after the cell removal and exogenous cell delivery and (ii) long-term in vitro culture of the cell-seeded trachea tissue. Using this custom-built bioreactor, we demonstrated (i) selective removal of the endogenous epithelial cells from the trachea lumen using detergent and vibration-assisted airway wash and (ii) uniform distribution of exogenous cells onto the luminal surface of the denuded t...

The luminal surface of the respiratory tract is lined by a layer of epithelium that mainly consists of multi-ciliated, club, goblet, and basal stem cells1,2. The epithelial layer serves as a primary defense mechanism of the lung, acting as a biophysical barrier that protects the underlying airway tissue against inhaled pathogens, particulates, or chemical gases. It protects the airway tissue via multiple mechanisms, including intercellular tight junction formation, mucociliary clearance, and antimicrobial and antioxidant secretion3,4. The defective airway epithelium is associated with devastating respiratory diseases, such as chronic obstructive pulmonary disease (COPD)5, primary ciliary dyskinesia (PCD)6, and cystic fibrosis (CF)7.
Advances in lung-on-chip (LOC) technology represent an opportunity to study human lung development, model various lung diseases, and develop new therapeutic materials in tightly regulated in vitro environments. For example, airway epithelium and endothelium can be cultured on opposite sides of a thin, porous membrane to mimic the gas exchanging lung tissue, allowing faithful disease modeling and drug testing8. Similarly, in vitro disease models have been created to model airway diseases in vitro, such as COPD9 and cystic fibrosis10. However, a major challenge of LOC devices is recapitulating the complex three-dimensional (3D) architecture of the lung tissue and dynamic cell-tissue matrix interactions in vitro11.
Recently, innovative tissue engineering methodologies have been developed that allow manipulation of ex vivo lung tissues12. Using these methodologies, denuded allogenic or xenogeneic tissue grafts can be prepared by removing the endogenous cells from the lung tissue via chemical, physical, and mechanical treatments13. In addition, the preserved native tissue extracellular matrix (ECM) in the decellularized lung scaffolds provide the physio-mimetic structural, biochemical, and biomechanical cues for implanted cells to attach, proliferate, and differentiate14,15.
Here, an imaging-guided bioreactor system created by combining LOC and tissue engineering technologies to allow in vitro tissue manipulation and culture of explanted rat tracheal tissues is reported. Using this airway tissue bioreactor, the protocol demonstrates selective removal of the endogenous epithelial cells without disrupting the underlying subepithelial cellular and biochemical components of the airway tissue. We next show the homogenous distribution and instantaneous deposition of the newly seeded exogenous cells, such as mesenchymal stem cells (MSCs), on the denuded airway lumen by instilling the cell-loaded collagen I pre-gel solution. In addition, by using the micro-optical imaging device integrated into the bioreactor, the visualization of the trachea lumen during epithelium removal and endogenous cell delivery is also done. Further, it is shown that the trachea and newly implanted cells can be cultured in the bioreactor without noticeable cell death and tissue degradation for 4 days. We envision that the imaging-enabled bioreactor platform, the thin film-based de-epithelialization technique, and the cell delivery method used in this study can be useful for generating airway tissues for in vitro disease modeling and drug screening.
The bioreactor includes a rectangular chamber connected to a programmable syringe pump, perfusion pump, and ventilator for culturing isolated rat trachea. The bioreactor features inlets and outlets connected to the trachea or the tissue culture chamber to separately supply reagents (e.g., culture media) to the internal and external spaces of the trachea (Figure 1). A custom-built imaging system can be used to visualize the interior of the in vitro-cultured rat trachea at the cellular level (Figure 2). The endogenous epithelium of the trachea is removed via the instillation of a detergent-based decellularization solution followed by vibration-assisted airway washing (Figure 3). Hydrogel solution, such as type I collagen, is used as a delivery vehicle for seeding exogenous cells uniformly and instantaneously across the denuded trachea lumen (Figure 4). All the materials used to construct the bioreactor and conduct the experiments are provided in the Table of Materials.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>1&#215; PBS</td>
			<td>Gibco, Thermo Fisher Scientific</td>
			<td>10-010-031</td>
			<td></td>
		</tr>
		<tr>
			<td>3-port connector</td>
			<td>World Precision Instruments</td>
			<td>14048-20</td>
			<td></td>
		</tr>
		<tr>
			<td>4-port connector</td>
			<td>World Precision Instruments</td>
			<td>14047-10</td>
			<td></td>
		</tr>
		<tr>
			<td>Accelerometer</td>
			<td>STMicroelectronics</td>
			<td>IIS3DWBTR</td>
			<td></td>
		</tr>
		<tr>
			<td>Achromatic doublet</td>
			<td>Thorlabs</td>
			<td>AC254-150-A-ML</td>
			<td></td>
		</tr>
		<tr>
			<td>Aluminum pin stub</td>
			<td>TED PELLA</td>
			<td>16111</td>
			<td></td>
		</tr>
		<tr>
			<td>Antibiotic-antimycotic</td>
			<td>Thermo Fisher Scientific</td>
			<td>15240062</td>
			<td></td>
		</tr>
		<tr>
			<td>Assembly rod</td>
			<td>Thorlabs</td>
			<td>ER1</td>
			<td></td>
		</tr>
		<tr>
			<td>Button head screws</td>
			<td>McMaster-Carr</td>
			<td>91255A274</td>
			<td></td>
		</tr>
		<tr>
			<td>Cage cube</td>
			<td>Thorlabs</td>
			<td>C4W</td>
			<td></td>
		</tr>
		<tr>
			<td>Carbon double-sided conductive tape</td>
			<td>TED PELLA</td>
			<td>16073</td>
			<td></td>
		</tr>
		<tr>
			<td>CFSE labelling kit</td>
			<td>Abcam</td>
			<td>ab113853</td>
			<td></td>
		</tr>
		<tr>
			<td>Citrisolv (clearing agent)</td>
			<td>Decon</td>
			<td>1061</td>
			<td></td>
		</tr>
		<tr>
			<td>C-mount adapter</td>
			<td>Thorlabs</td>
			<td>SM1A9</td>
			<td></td>
		</tr>
		<tr>
			<td>Collagen I</td>
			<td>Advanced BioMatrix</td>
			<td>5153</td>
			<td></td>
		</tr>
		<tr>
			<td>Conductive liquid silver paint</td>
			<td>TED PELLA</td>
			<td>16034</td>
			<td></td>
		</tr>
		<tr>
			<td>Dichroic mirror</td>
			<td>Semrock</td>
			<td>DI03-R488</td>
			<td>Reflected laser wavelengths:&#160; 473.0 +- 2 nm 488.0 +3/-2 nm</td>
		</tr>
		<tr>
			<td>Dulbecco&#39;s modified Eagle&#8217;s medium</td>
			<td>Gibco, Thermo Fisher Scientific</td>
			<td>11965118</td>
			<td></td>
		</tr>
		<tr>
			<td>Female luer bulkhead to hose barb adapter</td>
			<td>Cole-Parmer</td>
			<td>EW-45501-30</td>
			<td></td>
		</tr>
		<tr>
			<td>Female luer to tubing barb</td>
			<td>Cole-Parmer</td>
			<td>EW-45508-03</td>
			<td></td>
		</tr>
		<tr>
			<td>Female to male luer connector</td>
			<td>Cole-Parmer</td>
			<td>ZY-45508-80</td>
			<td></td>
		</tr>
		<tr>
			<td>Fetal bovine serum</td>
			<td>Gibco, Thermo Fisher Scientific</td>
			<td>10082147</td>
			<td></td>
		</tr>
		<tr>
			<td>Filter lens</td>
			<td>Chroma Technology Corp</td>
			<td>ET535/50m</td>
			<td></td>
		</tr>
		<tr>
			<td>Fluorescent microscope</td>
			<td>Nikon</td>
			<td>Eclipse E1000 - D</td>
			<td></td>
		</tr>
		<tr>
			<td>Fusion 360</td>
			<td>Autodesk</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Hex nut</td>
			<td>McMaster-Carr</td>
			<td>91813A160</td>
			<td></td>
		</tr>
		<tr>
			<td>Hexamethyldisilazane (HMDS)</td>
			<td>Fisher Scientifc</td>
			<td>AC120585000</td>
			<td></td>
		</tr>
		<tr>
			<td>Imaging fiber</td>
			<td>SELFOC, NSG group</td>
			<td>GRIN lens</td>
			<td></td>
		</tr>
		<tr>
			<td>Laser</td>
			<td>Opto Engine</td>
			<td>MDL-D-488-150mW</td>
			<td></td>
		</tr>
		<tr>
			<td>Lens tubes</td>
			<td>Thorlabs</td>
			<td>SM1L40</td>
			<td></td>
		</tr>
		<tr>
			<td>LIVE/DEAD Viability/Cytotoxicity Kit (Invitrogen)</td>
			<td>Thermo Fisher Scientific</td>
			<td>L3224</td>
			<td></td>
		</tr>
		<tr>
			<td>MACH 3 CNC Control Software</td>
			<td>Newfangled Solutions</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Objective lens</td>
			<td>Olympus</td>
			<td>UCPLFLN20X</td>
			<td></td>
		</tr>
		<tr>
			<td>Peristaltic Pump</td>
			<td>Cole Parmer</td>
			<td>L/S standard digital pump system</td>
			<td></td>
		</tr>
		<tr>
			<td>Recombinant human FGF-basic</td>
			<td>PeproTech</td>
			<td>100-18B</td>
			<td></td>
		</tr>
		<tr>
			<td>Retaining ring</td>
			<td>Thorlabs</td>
			<td>SM1RR</td>
			<td></td>
		</tr>
		<tr>
			<td>Scientific CMOS camera</td>
			<td>PCO Panda</td>
			<td>PCO Panda 4.2</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium dodecyl sulfate</td>
			<td>VWR</td>
			<td>97064-472</td>
			<td></td>
		</tr>
		<tr>
			<td>Solidworks (2019)</td>
			<td>Dassault Syst&#232;mes</td>
			<td></td>
			<td></td>
		</tr>
		<tr>
			<td>Stackable lens tube</td>
			<td>Thorlabs</td>
			<td>SM1L10</td>
			<td></td>
		</tr>
		<tr>
			<td>Subwoofer plate amplifier</td>
			<td>Dayton Audio</td>
			<td>SPA250DSP</td>
			<td></td>
		</tr>
		<tr>
			<td>Subwoofer speaker</td>
			<td>Dayton Audio</td>
			<td>RSS21OHO-4</td>
			<td>Diaphragm diameter: 21 cm</td>
		</tr>
		<tr>
			<td>Syringe Pump</td>
			<td>World Precision Instruments</td>
			<td>AL-4000</td>
			<td></td>
		</tr>
		<tr>
			<td>Threaded cage plate</td>
			<td>Thorlabs</td>
			<td>CP33</td>
			<td></td>
		</tr>
		<tr>
			<td>Threaded luer adapter</td>
			<td>Cole-Parmer</td>
			<td>EW-45513-81</td>
			<td></td>
		</tr>
		<tr>
			<td>Tube lens</td>
			<td>Thorlabs</td>
			<td>AC254-150-A-ML</td>
			<td></td>
		</tr>
		<tr>
			<td>Tygon Tubing</td>
			<td>Cole-Parmer</td>
			<td>13-200-110</td>
			<td></td>
		</tr>
		<tr>
			<td>XY Translator</td>
			<td>Thorlabs</td>
			<td>CXY1</td>
			<td></td>
		</tr>
	</tbody>
</table>

imaging-guided bioreactor for generating bioengineered airway tissue

Repeated injury to airway tissue can impair lung function and cause chronic lung disease, such as chronic obstructive pulmonary disease. Advances in regenerative medicine and bioreactor technologies offer opportunities to produce lab-grown functional tissue and organ constructs that can be used to screen drugs, model disease, and engineer tissue replacements. Here, a miniaturized bioreactor coupled with an imaging modality that allows in situ visualization of the inner lumen of explanted rat trachea during in vitro tissue manipulation and&#160;culture is described. Using this bioreactor, the protocol demonstrates imaging-guided selective removal of endogenous cellular components while preserving the intrinsic biochemical features and ultrastructure of the airway tissue matrix. Furthermore, the delivery, uniform distribution, and subsequent prolonged culture of exogenous cells on the decellularized airway lumen with optical monitoring in situ are shown. The results highlight that the imaging-guided bioreactor can potentially be used to facilitate the generation of functional in vitro airway tissues.

The GRIN lens-based in situ imaging modality can allow visualization of the tracheal inner lumen in situ (Figure 5A). Using this imaging method, both bright-field and fluorescent images of the native and de-epithelialized tracheas can be obtained (Figure 5B,C). No fluorescent signal was observed from the native trachea prior to CFSE labeling (Figure 5Bii). However, when the tracheal epithelium was ...

Watch this Scientific Journal Video about Imaging-Guided Bioreactor for Generating Bioengineered Airway Tissue at JoVE.com

Imaging-Guided Bioreactor for Generating Bioengineered Airway Tissue

The protocol describes an imaging-enabled bioreactor that allows the selective removal of the endogenous epithelium from the rat trachea and homogenous distribution of exogenous cells on the lumen surface, followed by long-term in vitro culture of the cell-tissue construct.

Repeated injury to airway tissue can impair lung function and cause chronic lung disease, such as chronic obstructive pulmonary disease. Advances in ...

Research

JoVE Journal

Bioengineering

Design of a Biaxial Mechanical Loading Bioreactor for Tissue Engineering

We  designed a loading device that is capable of applying uniaxial or biaxial  mechanical strain to a tissue engineered biocomposites fabricated for  ...

Microfluidic Picoliter Bioreactor for Microbial Single-cell Analysis: Fabrication, System Setup, and Operation

In this protocol the fabrication, experimental setup and basic operation of the recently introduced microfluidic picoliter bioreactor (PLBR) is described ...

Operation of a Benchtop Bioreactor

Fermentation systems are used to provide an optimal growth environment for many different types of cell cultures. The ability afforded by fermentors to ...

In vitro Cell Culture Model for Toxic Inhaled Chemical Testing

In vitro Cell Culture Model for Toxic Inhaled Chemical Testing

Cell cultures are indispensable to develop and study efficacy of therapeutic agents, prior to their use in animal models. We have the unique ability to ...

Cultivation of Mammalian Cells Using a Single-use Pneumatic Bioreactor System

Recent advances in mammalian, insect, and stem cell cultivation and scale-up have created tremendous opportunities for new therapeutics and personalized ...

Adapting the Electrospinning Process to Provide Three Unique Environments for a Tri-layered In Vitro Model of the Airway Wall

Adapting the Electrospinning Process to Provide Three Unique Environments for a Tri-layered In Vitro Model of the Airway Wall

Electrospinning is a highly adaptable method producing porous 3D fibrous scaffolds that can be exploited in in vitro cell culture. Alterations to ...

Generation of ESC-derived Mouse Airway Epithelial Cells Using Decellularized Lung Scaffolds

Lung lineage differentiation requires integration of complex environmental cues that include growth factor signaling, cell-cell interactions and ...

3D Magnetic Stem Cell Aggregation and Bioreactor Maturation for Cartilage Regeneration

Cartilage engineering remains a challenge due to the difficulties in creating an in vitro functional implant similar to the native tissue. An approach ...

Recombinant Collagen I Peptide Microcarriers for Cell Expansion and Their Potential Use As Cell Delivery System in a Bioreactor Model

Tissue engineering is a promising field, focused on developing solutions for the increasing demand on tissues and organs regarding transplantation ...

Cardiac Spheroids as in vitro Bioengineered Heart Tissues to Study Human Heart Pathophysiology

Despite several advances in cardiac tissue engineering, one of the major challenges to overcome remains the generation of a fully functional vascular ...