We acknowledge financial support from the American Heart Association Scientist Development Grant, 13SDG14670062 (PWA) and the University of Minnesota Doctoral Dissertation Fellowship (ESH). We also acknowledge the microfabrication resources of the Minnesota Nano Center (MNC) and the image processing resources of the University Imaging Centers (UIC), both at the University of Minnesota. Parts of this work were carried out in the Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRS program.

<ol>
	<li>Humphrey, J. D., Baek, S., 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=Biochemomechanics+of+cerebral+vasospasm+and+its+resolution:+I.+A+new+hypothesis+and+theoretical+framework.">Biochemomechanics of cerebral vasospasm and its resolution: I. A new hypothesis and theoretical framework.</a> Ann. Biomed. Eng. 35, 1485-1497 (2007).</li><li>Hald, E. S., Alford, P. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Smooth+muscle+phenotype+switching+in+blast+traumatic+brain+injury-induced+cerebral+vasospasm.">Smooth muscle phenotype switching in blast traumatic brain injury-induced cerebral vasospasm.</a> Transl. Stroke Res. 5, 385-393 (2014).</li><li>Olivetti, G., Anversa, P., Melissari, M., Loud, A. V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Morphometry+of+medial+hypertrophy+in+the+rat+thoracic+aorta.">Morphometry of medial hypertrophy in the rat thoracic aorta.</a> Lab. Invest. 42, 559-565 (1980).</li><li>, <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Atherosclerosis.">Atherosclerosis.</a> Nature. 407, 233-241 (2000).</li><li>Alford, P. W., Feinberg, A. W., Sheehy, S. P., Parker, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Biohybrid+thin+films+for+measuring+contractility+in+engineered+cardiovascular+muscle.">Biohybrid thin films for measuring contractility in engineered cardiovascular muscle.</a> Biomaterials. 31, 3613-3621 (2010).</li><li>Rhodin, J. A. G., ed, B. e. r. n. e. ,. R. .. ,. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Architecture+of+the+vessel+wall.">Architecture of the vessel wall.</a> Physiol. Rev. , (1979).</li><li>Balachandran, K., 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=Cyclic+strain+induces+dual-mode+endothelial-mesenchymal+transformation+of+the+cardiac+valve.">Cyclic strain induces dual-mode endothelial-mesenchymal transformation of the cardiac valve.</a> Proc. Natl. Acad. Sci. U. S. A. 108, 19943-19948 (2011).</li><li>Grosberg, A., Alford, P. W., McCain, M. L., Parker, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ensembles+of+engineered+cardiac+tissues+for+physiological+and+pharmacological+study:+heart+on+a+chip.">Ensembles of engineered cardiac tissues for physiological and pharmacological study: heart on a chip.</a> 11, 4165-4173 (2011).</li><li>Alford, P. W., Nesmith, A. P., Seywerd, J. N., Grosberg, A., Parker, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vascular+smooth+muscle+contractility+depends+on+cell+shape.">Vascular smooth muscle contractility depends on cell shape.</a> Integr. Biol. (Camb). 3, 1063-1070 (2011).</li><li>Win, Z., 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=Smooth+muscle+architecture+within+cell-dense+vascular+tissues+influences+functional+contractility).">Smooth muscle architecture within cell-dense vascular tissues influences functional contractility).</a> Integr. Biol. (Camb). , (2014).</li><li>Genchi, G. G., 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=Bio/non-bio+interfaces:+a+straightforward+method+for+obtaining+long+term+PDMS/muscle+cell+biohybrid+constructs).">Bio/non-bio interfaces: a straightforward method for obtaining long term PDMS/muscle cell biohybrid constructs).</a> Colloid Surface B. 105, 144-151 (2013).</li><li>Fessel, G., Cadby, J., Wunderli, S., van Weeren, R., Snedeker, J. G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dose-+and+time-dependent+effects+of+genipin+crosslinking+on+cell+viability+and+tissue+mechanics+-+Toward+clinical+application+for+tendon+repair.">Dose- and time-dependent effects of genipin crosslinking on cell viability and tissue mechanics - Toward clinical application for tendon repair.</a> Acta Biomater. , (2013).</li><li>Lima, E. G., 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=Genipin+enhances+the+mechanical+properties+of+tissue-engineered+cartilage+and+protects+against+inflammatory+degradation+when+used+as+a+medium+supplement.">Genipin enhances the mechanical properties of tissue-engineered cartilage and protects against inflammatory degradation when used as a medium supplement.</a> J. Biomed. Mater. Res. A. 91, 692-700 (2009).</li><li>Madhavan, K., Belchenko, D., Tan, W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Roles+of+genipin+crosslinking+and+biomolecule+conditioning+in+collagen-based+biopolymer:+Potential+for+vascular+media+regeneration.">Roles of genipin crosslinking and biomolecule conditioning in collagen-based biopolymer: Potential for vascular media regeneration.</a> J. Biomed. Mater. Res. A. , (2011).</li><li>Satyam, A., Subramanian, G. S., Raghunath, M., Pandit, A., Zeugolis, D. I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=In+vitro+evaluation+of+Ficoll-enriched+and+genipin-stabilised+collagen+scaffolds.">In vitro evaluation of Ficoll-enriched and genipin-stabilised collagen scaffolds.</a> J. Tissue Eng. Regen. Med. , (2012).</li><li>Alford, P. W., 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=Blast-induced+phenotypic+switching+in+cerebral+vasospasm.">Blast-induced phenotypic switching in cerebral vasospasm.</a> Proc. Natl. Acad. Sci. U. S. A. 108, 12705-12710 (2011).</li><li>Song, H., Tice, J. D., Ismagilov, R. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+microfluidic+system+for+controlling+reaction+networks+in+time.">A microfluidic system for controlling reaction networks in time.</a> Angew. Chem. Int. Ed. Engl. 42, 768-772 (2003).</li><li>Whitesides, G. M., Ostuni, E., Takayama, S., Jiang, X., Ingber, 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=Soft+lithography+in+biology+and+biochemistry.">Soft lithography in biology and biochemistry.</a> Annu. Rev. Biomed. Eng. 3, 335-373 (2001).</li><li>Hald, E. S., Steucke, K. E., Reeves, J. A., Win, Z., Alford, P. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Long-term+vascular+contractility+assay+using+genipin-modified+muscular+thin+films.">Long-term vascular contractility assay using genipin-modified muscular thin films.</a> Biofabrication. 6, 045005 (2014).</li><li>Han, M., Wen, J. K., Zheng, B., Cheng, Y., Zhang, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Serum+deprivation+results+in+redifferentiation+of+human+umbilical+vascular+smooth+muscle+cells.">Serum deprivation results in redifferentiation of human umbilical vascular smooth muscle cells.</a> Am. J. Physiol. Cell Physiol. 291, C50-C58 (2006).</li><li>Feinberg, A. W., 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=Muscular+thin+films+for+building+actuators+and+powering+devices.">Muscular thin films for building actuators and powering devices.</a> Science. 317, 1366-1370 (2007).</li><li>Volfson, D., Cookson, S., Hasty, J., Tsimring, L. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Biomechanical+ordering+of+dense+cell+populations.">Biomechanical ordering of dense cell populations.</a> Proc. Natl. Acad. Sci. U. S. A. 105, 15346-15351 (2008).</li><li>Intengan, H. D., Schiffrin, E. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vascular+remodeling+in+hypertension:+roles+of+apoptosis,+inflammation,+and+fibrosis.">Vascular remodeling in hypertension: roles of apoptosis, inflammation, and fibrosis.</a> Hypertension. 38, 581-587 (2001).</li><li>Kayembe, K. N., Sasahara, M., Hazama, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cerebral+aneurysms+and+variations+in+the+circle+of+Willis.">Cerebral aneurysms and variations in the circle of Willis.</a> Stroke. 15, 846-850 (1984).</li><li>McCain, M. L., Agarwal, A., Nesmith, H. W., Nesmith, A. P., Parker, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Micromolded+gelatin+hydrogels+for+extended+culture+of+engineered+cardiac+tissues.">Micromolded gelatin hydrogels for extended culture of engineered cardiac tissues.</a> Biomaterials. 35, 5462-5471 (2014).</li><li>Weir, B., Grace, M., Hansen, J., Rothberg, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Time+course+of+vasospasm+in+man.">Time course of vasospasm in man.</a> 48, 173-178 (1978).</li><li>McCain, M. L., Sheehy, S. P., Grosberg, A., Goss, J. A., Parker, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Recapitulating+maladaptive,+multiscale+remodeling+of+failing+myocardium+on+a+chip.">Recapitulating maladaptive, multiscale remodeling of failing myocardium on a chip.</a> Proc. Natl. Acad. Sci. U. S. A. 110, 9770-9775 (2013).</li><li>Agarwal, A., Goss, J. A., Cho, A., McCain, M. L., Parker, K. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Microfluidic+heart+on+a+chip+for+higher+throughput+pharmacological+studies.">Microfluidic heart on a chip for higher throughput pharmacological studies.</a> Lab. Chip. 13, 3599-3608 (2013).</li><li>Huh, D., Torisawa, Y. S., Hamilton, G. A., Kim, H. J., Ingber, 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=Microengineered+physiological+biomimicry:+organs-on-chips.">Microengineered physiological biomimicry: organs-on-chips.</a> Lab. Chip. 12, 2156-2164 (2012).</li><li>Meer, A. D., van den Berg, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Organs-on-chips:+breaking+the+in+vitro+impasse.">Organs-on-chips: breaking the in vitro impasse.</a> Integr. Biol. (Camb). 4, 461-470 (2012).</li></ol>

The authors have nothing to disclose.

Burada, kronik damar hastalığı yolların 1,23,24 uzun deney kat daha tipik izin önce geliştirilen vMTF teknolojisi üzerine inşa bir protokol mevcut. Bunu gerçekleştirmek için, daha önce MTF kontraktilitesi deneylerinde kullanılmak üzere geliştirilmiş bir vasküler doku canlılığı ile mühendislik arter lameller üretmek üzere bir mikro-akışkan yerleştirme tekniği kullanılarak, PDMS alt tabakalar 11 uzun süreli işlevselleştirilmesini sağlamak için gösterilmiştir genipi...

Serebral vazospazm 1,2, hipertansiyon 3 ve ateroskleroz 4 gibi vasküler hastalıklar, yavaş gelişen doğada tipik olarak kronik ve vasküler düz kas hücreleri (VSMC&#39;Ier) ile işlevsel kuvvet kuşak içerir. Biz in vivo modellere göre deneysel koşullar ince kontrolü ile in vitro yöntemleri kullanarak bu yavaş ilerleyen damar işlev bozuklukları incelemek hedefliyoruz. In vitro fonksiyonel kontraktilite ölçmek için biz daha önce geliştirilen damar kas ince filmler (vMTFs) kardiyovasküler dokuları 5 mühendislik, ancak bu yöntem nispeten kısa vadeli çalışmalar sınırlı kalmıştır. Burada, biz uzun vadeli ölçümler için önceki vMTF tekniği genişleyen bir alt tabaka değişiklik tekniğini sunuyoruz. Endotel genel vasküler işlev kritik olsa da, işlenmiş arter lameller vasküler değişiklikleri değerlendirmek için yararlı bir model sistemi sağlamakhastalığın ilerlemesi sırasında kontraktilite. Fonksiyonel vasküler hastalık doku modeli, yapısı ve arteriyel lamel işlevini hem mühendis, geminin temel kasılma birimi, yüksek sadakat ile değinmeyecek gerekir. Arter lameller 6 elastin tabakaları ile ayrılmış kontraktil VSMC&#39;Ierin eş, çevresel olarak hizalanmış levhalar vardır. Polidimetilsiloksan (PDMS) yüzeylerde hücre dışı matris (ECM) proteinleri microcontact baskı önceden kardiyovasküler doku 5,7-10 hizalanmış taklit eden doku organizasyonu için rehberlik ipuçları sağlamak için kullanılır olmuştur. Ancak, dokular kronik çalışmalarda uygulanabilirliğini sınırlayan, kültürde 3-4 gün sonra bütünlüğünü kaybedebilir microcontact baskı kullanarak desenli. Bu protokol, yeni bir mikroakışkan biriktirme tekniği ile önceki microcontact baskı teknikleri değiştirerek bu soruna bir çözüm sağlar. Genipin ve f Genchi ve ark., Modifiye edilmiş PDMS substratlaround kültürde 11 bir ay miyositlerin canlılığı kadar uzamış. Burada, biz PDMS üzerinde desenli damar düz kas hücrelerinin kültürünü genişletmek için benzer bir yaklaşım kullanın. Genipin, gardenya meyve doğal hidrolitik türevi, içindeki çapraz bağlama maddeleri ve doku onarımı 12,13 ile ECM modifikasyon 14 alanlarında biyomalzeme olarak artan kullanımı ile karşılaştırıldığında nedeniyle nispeten düşük toksisiteye alt-tabaka modifikasyonu için arzu edilen bir aday 15. Bu protokol, fibronektin, önceki microcontact baskı yöntemlerde olduğu gibi, bir cep yönlendirme işaret olarak kullanılmaktadır; Bununla birlikte, genipin fibronektin desen önce PDMS substratlar üzerine tatbik edilir. Hücreler desenli matrisi bozan Dolayısıyla, ekli VSMC&#39;Ierin gelen yeni sentezlenmiş ECM genipin kaplı PDMS substrata bağlanabilir. Bu protokol, iki aşamalı genipin ECM tevdi edilmesi için mikro-akışkan aktarım cihazını kullanmaktadır. Mikroakışkan cihaz taklit microco tasarımıDaha önceki çalışmalarda 16 tasarlanmış arteriyel ince tabakalar için kullanılan ntact baskı kalıpları. Böylece, bu protokol başarıyla in vivo yapısı ve arteriyel lamellerin kasılma fonksiyonunda yüksek hizalanmış özetlemek arteriyel lamel taklit verim bekliyoruz. Biz de bu genipin in vitro damar hastalığı modellerinde uzun vadede uygun bir substrat değişiklik bileşik onaylamak için doku kasılma değerlendirir.

<table border="0" cellpadding="0" cellspacing="0">
	<tbody>
		<tr>
			<td>Coverslip staining rack</td>
			<td>Electron Microscopy Sciences</td>
			<td><a href="http://www.emsdiasum.com/">www.emsdiasum.com/</a></td>
			<td>72239-04</td>
			<td>Alternative coverslip rack may be used</td>
		</tr>
		<tr>
			<td>Microscope cover glass - 25 mm</td>
			<td>Fisher Scientific, Inc.</td>
			<td><a href="http://www.fishersci.com/">www.fishersci.com</a></td>
			<td>12-545-102</td>
			<td>Alternative brand and size may be used; Microscope slides may also be substituted as substrate base</td>
		</tr>
		<tr>
			<td>Poly(N-iso-propylacrylamide) (PIPAAm)</td>
			<td>Polysciences, Inc.</td>
			<td><a href="http://www.polysciences.com/">www.polysciences.com/</a></td>
			<td>#21458</td>
			<td>Sigma-Aldrich makes an alternate compound, but we have not tested it for use with this protocol; Compound gives strong odor, use proper ventilation</td>
		</tr>
		<tr>
			<td>1-butanol</td>
			<td>Sigma-Aldrich</td>
			<td><a href="http://www.sigmaaldrich.com/">www.sigmaaldrich.com</a></td>
			<td align="right">360465</td>
			<td>Hazard: flammable (store stock solution in flammable cabinet); flash point is 37 &#176;C, avoid heating; alternative product may be used</td>
		</tr>
		<tr>
			<td>Spincoater</td>
			<td>Specialty Coating Systems, Inc.</td>
			<td><a href="http://www.scscoatings.com/">www.scscoatings.com</a></td>
			<td></td>
			<td>SCS G3P8 Model; Alternative brand and/or model may be used</td>
		</tr>
		<tr>
			<td>Polydimethylsiloxane (PDMS)</td>
			<td>Ellsworth Adhesives (Dow Corning)</td>
			<td><a href="http://www.ellsworth.com/">www.ellsworth.com</a></td>
			<td>184 SIL ELAST KIT 0.5KG</td>
			<td>Alternative distributor may be used</td>
		</tr>
		<tr>
			<td>Fluorescent microbeads</td>
			<td>Polysciences, Inc.</td>
			<td><a href="http://www.polysciences.com/">www.polysciences.com/</a></td>
			<td align="right">17151</td>
			<td>Alternative brand and/or larger size may be used</td>
		</tr>
		<tr>
			<td>Silicon wafers</td>
			<td>Wafer World, Inc.</td>
			<td><a href="http://www.waferworld.com/">www.waferworld.com</a></td>
			<td align="right">2398</td>
			<td>Alternative brand and/or size may be used</td>
		</tr>
		<tr>
			<td>Photoresist&#160;</td>
			<td>MicroChem Corp.</td>
			<td><a href="http://www.microchem.com/">www.microchem.com</a></td>
			<td></td>
			<td>SU-8 3025 allows 20-25-&#181;m feature height</td>
		</tr>
		<tr>
			<td>Contact mask aligner</td>
			<td>Suss MicroTec</td>
			<td><a href="http://www.suss.com/">www.suss.com</a></td>
			<td></td>
			<td>MA6 contact mask aligner; alternative brand and/or model may be used for wafer exposure</td>
		</tr>
		<tr>
			<td>Developer</td>
			<td>MicroChem Corp.</td>
			<td><a href="http://www.microchem.com/">www.microchem.com</a></td>
			<td></td>
			<td>SU-8 Developer; Hazard: flammable</td>
		</tr>
		<tr>
			<td>Tridecafluro-trichlorosilane</td>
			<td>UCT Specialties, Inc.</td>
			<td><a href="http://www.unitedchem.com/">www.unitedchem.com</a></td>
			<td>T2492</td>
			<td>Silane for non-stick coating of patterned silicon wafers (CAUTION: Tridecafluro-trichlorosilane is a flammable and corrosive liquid. Proper personal protective equipment and local exhaust is necessary for use. )</td>
		</tr>
		<tr>
			<td>Surgical biopsy punch</td>
			<td>Integra LifeSciences Corp.</td>
			<td><a href="http://www.miltex.com/">www.miltex.com</a></td>
			<td>33-31AA-P/25</td>
			<td>Alternative brand and/or size may be used</td>
		</tr>
		<tr>
			<td>Genipin</td>
			<td>Cayman Chemical</td>
			<td><a href="http://www.caymanchem.com/">www.caymanchem.com</a></td>
			<td align="right">10010622</td>
			<td>Sigma-Aldrich (G4796-25MG) makes an alternate compound, but we have not tested it for use with this protocol</td>
		</tr>
		<tr>
			<td>1X phosphate buffered saline</td>
			<td>Mediatech, Inc.</td>
			<td><a href="http://www.cellgro.com/">www.cellgro.com</a></td>
			<td>21-031-CV</td>
			<td>Alternative brand may be used</td>
		</tr>
		<tr>
			<td>Fibronectin</td>
			<td>Corning, Inc.</td>
			<td><a href="http://www.corning.com/">www.corning.com</a></td>
			<td align="right">356008</td>
			<td>Sigma-Aldrich (F1056) makes an alternate compound, but we have not tested it for use with this protocol</td>
		</tr>
		<tr>
			<td>Penicillin/streptomycin</td>
			<td>Life Technologies, Inc.</td>
			<td><a href="http://www.lifetechnologies.com/">www.lifetechnologies.com</a></td>
			<td>15140-122</td>
			<td>Alternative brand and/or size may be used, as long as concentration is the same</td>
		</tr>
		<tr>
			<td>Umbillical artery smooth muscle cells</td>
			<td>Lonza</td>
			<td><a href="http://www.lonza.com/">www.lonza.com</a></td>
			<td>CC-2579</td>
			<td>Alternative cell types may be used for alternative applications. Media should be modified accordingly</td>
		</tr>
		<tr>
			<td>Tyrode&#39;s solution components</td>
			<td>Sigma-Aldrich</td>
			<td><a href="http://www.sigmaaldrich.com/">www.sigmaaldrich.com</a></td>
			<td>various</td>
			<td>Alternative brand may be used for mixing solution</td>
		</tr>
		<tr>
			<td>Stereomicroscope</td>
			<td>Zeiss</td>
			<td><a href="http://www.zeiss.com/">www.zeiss.com</a></td>
			<td>4350020000000000</td>
			<td>SteREOLumar V12; Alternative brand/type of stereomicroscope may be used</td>
		</tr>
		<tr>
			<td>Temperature-controlled platform</td>
			<td>Warner Instruments</td>
			<td><a href="http://www.warneronline.com/">www.warneronline.com</a></td>
			<td>641659; 640352; 641922</td>
			<td></td>
		</tr>
		<tr>
			<td>Endothelin-1</td>
			<td>Sigma-Aldrich</td>
			<td><a href="http://www.sigmaaldrich.com/">www.sigmaaldrich.com</a></td>
			<td>E7764-50UG</td>
			<td>Alternative amount may be purchased, as long as treatment concentration is maintained</td>
		</tr>
		<tr>
			<td>HA-1077</td>
			<td>Sigma-Aldrich</td>
			<td><a href="http://www.sigmaaldrich.com/">www.sigmaaldrich.com</a></td>
			<td>H139-10MG</td>
			<td>Alternative amount may be purchased, as long as treatment concentration is maintained</td>
		</tr>
	</tbody>
</table>

microfluidic genipin deposition technique for extended culture of micropatterned vascular muscular thin films

The chronic nature of vascular disease progression requires the development of experimental techniques that simulate physiologic and pathologic vascular behaviors on disease-relevant time scales. Previously, microcontact printing has been used to fabricate two-dimensional functional arterial mimics through patterning of extracellular matrix protein as guidance cues for tissue organization. Vascular muscular thin films utilized these mimics to assess functional contractility. However, the microcontact printing fabrication technique used typically incorporates hydrophobic PDMS substrates. As the tissue turns over the underlying extracellular matrix, new proteins must undergo a conformational change or denaturing in order to expose hydrophobic amino acid residues to the hydrophobic PDMS surfaces for attachment, resulting in altered matrix protein bioactivity, delamination, and death of the tissues.
Here, we present a microfluidic deposition technique for patterning of the crosslinker compound genipin. Genipin serves as an intermediary between patterned tissues and PDMS substrates, allowing cells to deposit newly-synthesized extracellular matrix protein onto a more hydrophilic surface and remain attached to the PDMS substrates. We also show that extracellular matrix proteins can be patterned directly onto deposited genipin, allowing dictation of engineered tissue structure. Tissues fabricated with this technique show high fidelity in both structural alignment and contractile function of vascular smooth muscle tissue in a vascular muscular thin film model. This technique can be extended using other cell types and provides the framework for future study of chronic tissue- and organ-level functionality.

Bu çalışmanın temel amacı, hidrofobik PDMS yüzeylerde micropatterned VSMC&#39;lerin canlılığı uzatmak oldu. Bu desenli genipin ve PDMS ile fibronektin (Şekil 1) biriktirilmesi için bir mikro-akışkan dağıtım sistemi eklenerek gerçekleştirilmiştir. Mikroakışkan teslim kullanarak ECM proteinleri Biriktirme genipin ve fibronektin (Şekil 1D) satırları arasında çıplak PDMS kanal desen yüksek sadakat transferi vermiştir. Önceki microcontact baskı yöntemleri <su...

Watch this Scientific Journal Video about Microfluidic Genipin Deposition Technique for Extended Culture of Micropatterned Vascular Muscular Thin Films at JoVE.com

Microfluidic Genipin Deposition Technique for Extended Culture of Micropatterned Vascular Muscular Thin Films

We present a method for microfluidic deposition of patterned genipin and fibronectin on PDMS substrates, allowing extended viability of vascular smooth muscle cell-dense tissues. This tissue fabrication method is combined with previous vascular muscular thin film technology to measure vascular contractility over disease-relevant time courses.

Micropatterned Vasküler Musküler İnce Filmlerin Genişletilmiş Kültür mikroakışkan Genipin Biriktirme Tekniği

The chronic nature of vascular disease progression requires the development of experimental techniques that simulate physiologic and pathologic vascular ...

microfluidic-genipin-deposition-technique-for-extended-culture

Research

JoVE Journal

Bioengineering

7.6K Görüntüleme.  University of Minnesota. We present a method for microfluidic deposition of patterned genipin and fibronectin on PDMS substrates, allowing extended viability of vascular smooth muscle cell-dense tissues. This tissue fabrication method is combined with previous vascular muscular thin film technology to measure vascular contractility over disease-relevant time courses.