Name: micropatterning and assembly of 3d microvessels
Uploaded: 2016-09-09T15:00:00
Description: Watch this Scientific Journal Video about Micropatterning and Assembly of 3D Microvessels at JoVE.com

Os autores gostariam de reconhecer a Lynn e Mike Garvey imagem Laboratório do Instituto de Células Estaminais e Medicina Regenerativa, bem como o Mecanismo de Washington Nanofabricação da Universidade de Washington. Eles também agradecem o apoio financeiro do Instituto Nacional de Saúde concede DP2DK102258 (para YZ) e formação concede T32EB001650 (a SSK e MAR) e T32HL007312 (MAR).

1. Microfabricação de Patterned polidimetilsiloxano (PDMS) com Network Design <ol><li> De fabricação de wafer criar um modelo negativo do Projeto de Rede <ol><li> Criar um padrão de rede usando qualquer software assistida por computador (CAD). Certifique-se de que a dimensão diagonal entre a entrada e saída de acordo com a distância entre a entrada e saída reservatórios nos dispositivos da habitação em etapas futuras (ver 2.1.1). Nota: O desenho do padrão em si é personalizado de ...

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	<li>Rubanyi, G. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+role+of+endothelium+in+cardiovascular+homeostasis+and+diseases.">The role of endothelium in cardiovascular homeostasis and diseases.</a> J. Cardiovasc. Pharmacol. 22, 37-44 (1993).</li><li>van Hinsbergh, V. W. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+endothelium:+vascular+control+of+haemostasis.">The endothelium: vascular control of haemostasis.</a> Eur. J. Obstet. Gynecol. Reprod. Biol. 95 (2), 198-201 (2001).</li><li>Chiu, J. -. J., Chien, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Effects+of+Disturbed+Flow+on+Vascular+Endothelium:+Pathophysiological+Basis+and+Clinical+Perspectives.">Effects of Disturbed Flow on Vascular Endothelium: Pathophysiological Basis and Clinical Perspectives.</a> Physiol. Rev. 91, 327-387 (2011).</li><li>Qi, Y., Jiang, 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=PDGF-BB+and+TGB-b1+on+cross-talk+between+endothelial+and+smooth+muscle+cells+in+vascular+remodeling+induced+by+low+shear+stress.">PDGF-BB and TGB-b1 on cross-talk between endothelial and smooth muscle cells in vascular remodeling induced by low shear stress.</a> Proc. Natl. Acad. Sci. U. S. A. 108, 1908-1913 (2011).</li><li>Sozzani, S., Del Prete, A., Bonecchi, R., Locati, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chemokines+as+effector+and+target+molecules+in+vascular+biology.">Chemokines as effector and target molecules in vascular biology.</a> Cardiovasc. Res. 107 (3), 364-372 (2015).</li><li>Huh, D., Hamilton, G. A., 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=From+3D+cell+culture+to+organs-on-chips.">From 3D cell culture to organs-on-chips.</a> Trends Cell Biol. 21 (12), 745-754 (2011).</li><li>Staton, C. a., Reed, M. W. R., Brown, N. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+critical+analysis+of+current+in+vitro+and+in+vivo+angiogenesis+assays.">A critical analysis of current in vitro and in vivo angiogenesis assays.</a> Int. J. Exp. Pathol. 90, 195-221 (2009).</li><li>Greek, R., Menache, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Systematic+Reviews+of+Animal+Models:+Methodology+versus+Epistemology.">Systematic Reviews of Animal Models: Methodology versus Epistemology.</a> Int. J. Med. Sci. 10, 206-221 (2013).</li><li>van der Worp, H. B., Howells, D. 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=Can+Animal+Models+of+Disease+Reliably+Inform+Human+Studies.">Can Animal Models of Disease Reliably Inform Human Studies.</a> PLoS Med. 7 (3), e1000245 (2010).</li><li>Leong, X. -. F., Ng, C. -. Y., Jaarin, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Animal+Models+in+Cardiovascular+Research:+Hypertension+and+Atherosclerosis.">Animal Models in Cardiovascular Research: Hypertension and Atherosclerosis.</a> Biomed Res. Int. 2015, 528757 (2015).</li><li>Pries, A. R., Secomb, 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=Making+Microvascular+Networks+Work:+Angiogenesis,+Remodeling,+and+Pruning.">Making Microvascular Networks Work: Angiogenesis, Remodeling, and Pruning.</a> Physiology. 29, 446-455 (2014).</li><li>D'Amore, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Mechanisms+Of+Angiogenesis.">Mechanisms Of Angiogenesis.</a> Annu. Rev. Physiol. 49, 453-464 (1987).</li><li>Geudens, I., Gerhardt, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Coordinating+cell+behaviour+during+blood+vessel+formation.">Coordinating cell behaviour during blood vessel formation.</a> Development. 138, 4569-4583 (2011).</li><li>Ribatti, D., Nico, B., Crivellato, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+development+of+the+vascular+system:+a+historical+overview.">The development of the vascular system: a historical overview.</a> Methods Mol. Biol. 1214, 1-14 (2015).</li><li>Ribatti, D., Nico, B., Crivellato, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Morphological+and+molecular+aspects+of+physiological+vascular+morphogenesis.">Morphological and molecular aspects of physiological vascular morphogenesis.</a> Angiogenesis. 12 (2), 101-111 (2009).</li><li>Bautch, V. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=VEGF-directed+blood+vessel+patterning:+From+cells+to+organism.">VEGF-directed blood vessel patterning: From cells to organism.</a> Cold Spring Harb. Perspect. Med. 2 (9), 1-12 (2012).</li><li>Stratman, A. N., Schwindt, A. E., Malotte, K. M., Davis, G. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Endothelial-derived+PDGF-BB+and+HB-EGF+coordinately+regulate+pericyte+recruitment+during+vasculogenic+tube+assembly+and+stabilization.">Endothelial-derived PDGF-BB and HB-EGF coordinately regulate pericyte recruitment during vasculogenic tube assembly and stabilization.</a> Blood. 116, 4720-4730 (2010).</li><li>Bach, T. L., Barsigian, C., 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=VE-Cadherin+mediates+endothelial+cell+capillary+tube+formation+in+fibrin+and+collagen+gels.">VE-Cadherin mediates endothelial cell capillary tube formation in fibrin and collagen gels.</a> Exp. Cell Res. 238 (238), 324-334 (1998).</li><li>Kubow, K. E., Conrad, S. K., Horwitz, a. R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Matrix+microarchitecture+and+myosin+II+determine+adhesion+in+3D+matrices.">Matrix microarchitecture and myosin II determine adhesion in 3D matrices.</a> Curr. Biol. 23 (17), 1607-1619 (2013).</li><li>Potapova, I. A., Gaudette, G. 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=Mesenchymal+Stem+Cells+Support+Migration,+Extracellular+Matrix+Invasion,+Proliferation,+and+Survival+of+Endothelial+Cells+In+Vitro.">Mesenchymal Stem Cells Support Migration, Extracellular Matrix Invasion, Proliferation, and Survival of Endothelial Cells In Vitro.</a> Stem Cells. 25 (7), 1761-1768 (2007).</li><li>Bayless, K. J., Davis, G. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Sphingosine-1-phosphate+markedly+induces+matrix+metalloproteinase+and+integrin-dependent+human+endothelial+cell+invasion+and+lumen+formation+in+three-dimensional+collagen+and+fibrin+matrices.">Sphingosine-1-phosphate markedly induces matrix metalloproteinase and integrin-dependent human endothelial cell invasion and lumen formation in three-dimensional collagen and fibrin matrices.</a> Biochem. Biophys. Res. Commun. 312 (4), 903-913 (2003).</li><li>Hellstr&#246;m, M., Gerhardt, 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=Lack+of+pericytes+leads+to+endothelial+hyperplasia+and+abnormal+vascular+morphogenesis.">Lack of pericytes leads to endothelial hyperplasia and abnormal vascular morphogenesis.</a> J. Cell Biol. 152 (3), 543-553 (2001).</li><li>Tulloch, N. L., Muskheli, 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=Growth+of+Engineered+Human+Myocardium+With+Mechanical+Loading+and+Vascular+Coculture.">Growth of Engineered Human Myocardium With Mechanical Loading and Vascular Coculture.</a> Circ. Res. 109, 47-59 (2011).</li><li>Davis, G. E., Saunders, W. B. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Molecular+balance+of+capillary+tube+formation+versus+regression+in+wound+repair:+role+of+matrix+metalloproteinases+and+their+inhibitors.">Molecular balance of capillary tube formation versus regression in wound repair: role of matrix metalloproteinases and their inhibitors.</a> J. Investig. dermatology Symp. 11 (1), 44-56 (2006).</li><li>Kannan, R. Y., Salacinski, H. J., Butler, P. E., Hamilton, G., Seifalian, A. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Current+status+of+prosthetic+bypass+grafts:+a+review.">Current status of prosthetic bypass grafts: a review.</a> J. Biomed. Mater. Res. B. Appl. Biomater. 74, 570-581 (2005).</li><li>Nerem, R. M., Seliktar, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Vascular+Tissue+Engineering.">Vascular Tissue Engineering.</a> Annu. Rev. Biomed. Eng. 3 (1), 225-243 (2001).</li><li>Melchiorri, A. J., Hibino, N., Fisher, J. P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Strategies+and+techniques+to+enhance+the+in+situ+endothelialization+of+small-diameter+biodegradable+polymeric+vascular+grafts.">Strategies and techniques to enhance the in situ endothelialization of small-diameter biodegradable polymeric vascular grafts.</a> Tissue Eng. Part B. Rev. 19 (4), 292-307 (2013).</li><li>Abbott, W. M., Callow, A., Moore, W., Rutherford, R., Veith, F., Weinberg, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Evaluation+and+performance+standards+for+arterial+prostheses.">Evaluation and performance standards for arterial prostheses.</a> J. Vasc. Surg. 17 (4), 746-756 (1993).</li><li>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=Functional+Arteries+Grown+in+Vitro.">Functional Arteries Grown in Vitro.</a> Science. 284 (5413), 489-493 (1999).</li><li>Niklason, L., Counter, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Blood+vessels+engineered+from+human+cells+-+Authors'+reply.">Blood vessels engineered from human cells - Authors' reply.</a> Lancet. 366 (9489), 892-893 (2005).</li><li>Zheng, Y., 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=In+vitro+microvessels+for+the+study+of+angiogenesis+and+thrombosis.">In vitro microvessels for the study of angiogenesis and thrombosis.</a> Proc. Natl. Acad. Sci. U. S. A. 109, 9342-9347 (2012).</li><li>Zheng, Y., Chen, J., L&#242;pez, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Flow-driven+assembly+of+VWF+fibres+and+webs+in+in+vitro+microvessels.">Flow-driven assembly of VWF fibres and webs in in vitro microvessels.</a> Nat. Commun. 6, 7858 (2015).</li><li>Ligresti, G., Nagao, R. 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=A+Novel+Three-Dimensional+Human+Peritubular+Microvascular+System.">A Novel Three-Dimensional Human Peritubular Microvascular System.</a> J. Am. Soc. Nephrol. 27, (2015).</li><li>Roberts, M. A., Tran, 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=Stromal+cells+in+dense+collagen+promote+cardiomyocyte+and+microvascular+patterning+in+engineered+human+heart+tissue.">Stromal cells in dense collagen promote cardiomyocyte and microvascular patterning in engineered human heart tissue.</a> Tissue Eng. Part A. , (2016).</li><li>Qin, D., Xia, Y., Whitesides, G. M. <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+for+micro-+and+nanoscale+patterning.">Soft lithography for micro- and nanoscale patterning.</a> Nat. Protoc. 5 (3), 491-502 (2010).</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=Alpha-Step+200+Manual.">Alpha-Step 200 Manual.</a> Tencor Instruments. , (1989).</li><li>Rajan, N., Habermehl, J., Cot&#233;, M. -. F., Doillon, C. J., Mantovani, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Preparation+of+ready-to-use,+storable+and+reconstituted+type+I+collagen+from+rat+tail+tendon+for+tissue+engineering+applications.">Preparation of ready-to-use, storable and reconstituted type I collagen from rat tail tendon for tissue engineering applications.</a> Nat. Protoc. 1 (6), 2753-2758 (2006).</li><li>Baudin, B., Bruneel, A., Bosselut, N., Vaubourdolle, 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+protocol+for+isolation+and+culture+of+human+umbilical+vein+endothelial+cells.">A protocol for isolation and culture of human umbilical vein endothelial cells.</a> Nat. Protoc. 2 (3), 481-485 (2007).</li><li>Leung, A. D., Wong, K. H. K., Tien, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Plasma+expanders+stabilize+human+microvessels+in+microfluidic+scaffolds.">Plasma expanders stabilize human microvessels in microfluidic scaffolds.</a> J. Biomed. Mater. Res. - Part A. 100 (7), 1815-1822 (2012).</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=Tousimis+SAMDRI-780+Critical+Point+Drying+Apparatus.">Tousimis SAMDRI-780 Critical Point Drying Apparatus.</a> Tousimis Research Corporation. , (1987).</li><li>Palpant, N. J., Pabon, 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=Inhibition+of+&#946;-catenin+signaling+respecifies+anterior-like+endothelium+into+beating+human+cardiomyocytes.">Inhibition of &#946;-catenin signaling respecifies anterior-like endothelium into beating human cardiomyocytes.</a> Development. 142 (18), 3198-3209 (2015).</li><li>Gimbrone, M. a., Topper, J. N., Nagel, T., Anderson, K. R., Garcia-Cardena, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Endothelial+Dysfunction,+Hemodynamic+Forces,+and+Atherogenesis.">Endothelial Dysfunction, Hemodynamic Forces, and Atherogenesis.</a> Thromb. Haemost. 82, 722-726 (1999).</li><li>Wu, M. H., Ustinova, E., Granger, H. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Integrin+binding+to+fibronectin+and+vitronectin+maintains+the+barrier+function+of+isolated+porcine+coronary+venules.">Integrin binding to fibronectin and vitronectin maintains the barrier function of isolated porcine coronary venules.</a> J. Physiol. 532 (3), 785-791 (2001).</li><li>Ribatti, D., Nico, B., Vacca, A., Roncali, L., Dammacco, F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Endothelial+cell+heterogeneity+and+organ+specificity.">Endothelial cell heterogeneity and organ specificity.</a> J. Hematother. Stem Cell Res. 11, 81-90 (2002).</li><li>Shanks, N., Greek, R., Greek, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Are+animal+models+predictive+for+humans.">Are animal models predictive for humans.</a> Philos. Ethics. Humanit. Med. 4, 2 (2009).</li></ol>

Engineered microvasos são um modelo in vitro onde as características fisiológicas, tais como a geometria do lúmen, as forças hidrodinâmicas, e interacções multi-celulares estão presentes e sintonizável. Este tipo de plataforma é poderosa na medida em que oferece a capacidade para modelar e estudar o comportamento endotelial numa variedade de contextos em que as condições de cultura in vitro podem ser combinados com a do microambiente em questão. Por exemplo, os mecanismos de condução pr...

A microvasculatura em cada órgão ajuda a definir o microambiente tecido, manter a homeostase do tecido e regular a inflamação, a permeabilidade, a trombose, e fibrinólise 1,2. Endotélio microvascular, em particular, é a interface entre o fluxo de sangue e o tecido circundante e, por conseguinte, desempenha um papel crítico na modulação da função do órgão e vascular em resposta a estímulos, tais como as forças hidrodinâmicas e citoquinas e hormonas circulantes 3 ​​- 5. Compreendendo as interacções específicas entre o endotélio, o sangue, e o microambiente circundante do tecido é importante para o estudo da biologia vascular e a progressão da doença. No entanto, o progresso em estudar essas interações tem sido dificultada pela limitação em ferramentas in vitro que não recapitulam na estrutura microvascular vivo e função 6,7. Como resultado, o campo e avanço terapêutico tem se baseou fortemente em caro e tempo-consumir modelos animais, que muitas vezes não conseguem traduzir para o sucesso em seres humanos 8 - 10. Enquanto modelos in vivo são de valor inestimável no estudo dos mecanismos da doença e funções vasculares, eles são complexos e muitas vezes não têm controle preciso do indivíduo celulares, bioquímicos e biofísicos pistas. Vasculatura por todo o corpo possui uma estrutura hierárquica madura em conjunto com leitos capilares expansivas, proporcionando perfusão otimizado e transporte de nutrientes simultaneamente 11. Inicialmente, as formas vasculatura como um plexo primitiva, que reorganiza a uma rede hierarquicamente ramificada durante o desenvolvimento precoce 12,13. Embora muitos dos sinais envolvidos nestes processos são bem compreendidos 14-16, permanece elusiva como tal modelação vascular é determinada 15. Por sua vez, recapitulando este processo in vitro para projetar redes vasculares organizados tem a abelhan. Muitas in vitro plataformas difíceis existentes para modelar vasculatura, tais como culturas de células endoteliais duas dimensões, não têm características importantes, tais como a proximidade de multi-celular, três luminal geometria dimensional, fluxo, e a matriz extracelular. Tubo de ensaios de formação em hidrogéis 3D (colágeno ou fibrina) 17 - 19 ou invasão ensaios 20,21 têm sido utilizados para estudar a função endotelial em 3D e suas interações com outros vasculares 17,22 ou de células do tecido tipos 23. No entanto, montados em lúmens estes ensaios não têm interconectividade, fluxo hemodinâmico, e perfusão adequada. Além disso, a propensão para a regressão vascular nestes ensaios de formação de tubo 24 evita a cultura a longo prazo e a maturação o que limita o grau de estudos funcionais que podem ser executadas. Assim, há uma necessidade crescente de engenheiro em plataformas in vitro de redes microvasculares que podem modelar adequadamente enendotelial características e são capazes de cultura a longo prazo. Uma variedade de técnicas de engenharia vasculares têm surgido ao longo dos anos para aplicações médicas para substituir ou vasos de bypass afetados em pacientes com doença vascular. Vasos de grande diâmetro feitas de materiais sintéticos, tais como tereftalato de polietileno (PET), e politetrafluoroetileno (ePTFE) tiveram sucesso terapêutico considerável com permeabilidade longo prazo (média desobstrução de 95% mais de 5 anos) 25. Apesar de pequeno diâmetro enxertos sintéticos (&lt;6 mm) geralmente enfrentam complicações como a hiperplasia da íntima e trombopoiese 26 - 28, da engenharia de tecidos enxertos de pequeno diâmetro feitos com material biológico fizeram progressos significativos 29,30. Apesar dos avanços desse tipo, vasos de engenharia em microescala mantiveram-se um desafio. Para modelar adequadamente a microcirculação, é necessário para gerar padrões de rede complexos com sufficiente de resistência mecânica para manter a desobstrução, e com uma composição da matriz que permite tanto a permeação de nutrientes para as células parenquimatosas e remodelação celular. Este protocolo apresenta um romance rede de vasos perfusable artificial que imita um nativo in vivo configuração com um ajustável e controlável microambiente 31-34. O método descrito gera microvasos artificiais, com diâmetros na ordem de 100 um. microvasos engenharia são fabricados por perfusão células endoteliais através de um canal microfluídico que está incorporado dentro do tipo macio I colágeno hidrogel. Este sistema tem a capacidade de gerar redes estampados com estrutura luminal aberta, replicar interações multi-celulares, modular a composição da matriz extracelular, e aplicar forças hemodinâmicas fisiologicamente relevantes.

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	</colgroup>
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:459px;">Wafer Fabrication</td>
			<td style="width:225px;"></td>
			<td style="width:140px;"></td>
			<td style="width:540px;"></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">AutoGlow Plasma System</td>
			<td>AutoGlow</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Headway Spin Coater</td>
			<td>Headway Research, Inc&#160;</td>
			<td colspan="2">PWM32 Spin Coater&#160;</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">ABM Contact Aligner</td>
			<td>AB-M</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Alpha Step Profilometer</td>
			<td>Tencor</td>
			<td>Alpha Step 200</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">SU-8 Developer</td>
			<td>Microchem</td>
			<td>Y020100</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">SU-8 Resist</td>
			<td>Microchem</td>
			<td>SU-8 2000</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">8&#34; silicon wafer</td>
			<td>Wafer World Inc.</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Tabletop Micro Pattern Generator</td>
			<td>Heidelberg Instruments</td>
			<td>&#956;PG 101</td>
			<td>For generation of photomask</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Hot plate</td>
			<td>VWR</td>
			<td>97042-646</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Ispropyl alcohol</td>
			<td>Avantor Performance Materials</td>
			<td>9088</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Petri dishes (120 x 120 mm, square)</td>
			<td>Sigma-Aldrich</td>
			<td>Z617679</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Trichloro(3,3,3-trifluoropropyl)silane</td>
			<td>Sigma-Aldrich</td>
			<td>MKBG3805V</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Polydimethylsiloxane (PDMS) elastomer base and curing agent</td>
			<td>Dow Corning</td>
			<td>Sylgard 184</td>
			<td>Mixed at 10:1 (w/w)</td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Vacuum desiccator</td>
			<td>Sigma-Aldrich</td>
			<td>Z119024-1EA</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Oven</td>
			<td>VWR</td>
			<td>9120976</td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">Device Fabrication and Culture</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="17">
			<td height="17" style="height:17px;">poly(methyl methacrylate) (PMMA)</td>
			<td>Plexiglas</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Corona Treater</td>
			<td>Electro-Technic Products, Inc.</td>
			<td>BD-20</td>
			<td>Handheld device for plasma treatment of PMMA devices and PDMS molds</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Soldering Iron</td>
			<td>Weller&#160;</td>
			<td>WTCPS</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Stainless Steel Truss Head Slotted Machine Screw</td>
			<td>McMaster-Carr&#160;</td>
			<td>91785A096</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Stainless steel dowel pins</td>
			<td>McMaster-Carr&#160;</td>
			<td>93600A060</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Tweezers&#160;</td>
			<td>Miltex</td>
			<td>24-572</td>
			<td>Any similar tweezers may be used</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Spatula (Micro Spoon)</td>
			<td>Electron Microscopy Services</td>
			<td>62410-01</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Screw driver</td>
			<td></td>
			<td></td>
			<td>Any flat head screwdriver may be used, autoclaved</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Glass coverslips (22 x 22 mm)</td>
			<td>Fisher Scientific</td>
			<td>12-542B</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Bleach</td>
			<td>Clorox</td>
			<td>4460030966</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Petri dishes (150 X 25mm)</td>
			<td>Corning</td>
			<td>430599</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Petri dishes (100 X 20 mm)</td>
			<td>Corning</td>
			<td>2909</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Cotton, cut into 1 cm x 3 cm pieces</td>
			<td></td>
			<td></td>
			<td>Autoclaved</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Polyethyleneimine (PEI)</td>
			<td>Sigma-Aldrich</td>
			<td>P3143</td>
			<td>Dilute to 1% in cell culture grade water</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Glutaraldehyde</td>
			<td>Sigma-Aldrich</td>
			<td>G6257</td>
			<td>Dilute to 0.1% in cell culture grade water</td>
		</tr>
		<tr height="26">
			<td height="26" style="height:26px;">Sterile H2O</td>
			<td></td>
			<td></td>
			<td>Autoclaved DI H2O</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Type I collagen, dissolved in 0.1% acetic acid</td>
			<td></td>
			<td></td>
			<td>Isolated from rat tails as described in Rajan et. al. 2006 (ref #37)</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">1 mL syringe</td>
			<td>BD</td>
			<td>309659</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">10 mL syringe</td>
			<td>BD</td>
			<td>309604</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">15 mL conical tubes</td>
			<td>Corning</td>
			<td>352097</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">30 mL conical tubes</td>
			<td>Corning</td>
			<td>352098</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">M199 10X Media&#160;</td>
			<td>Life Technologies</td>
			<td>11825-015</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">1N NaOH (sterile)</td>
			<td>Sigma-Aldrich</td>
			<td>415413</td>
			<td>Dilute to 1N in cell culture grade water</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">HUVECs&#160;</td>
			<td>Lonza</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Endothelial growth media</td>
			<td>Lonza</td>
			<td>CC-3124</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Trypsin</td>
			<td>Corning</td>
			<td>25-052-CI</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Fetal bovine serum (FBS)</td>
			<td>Thermofisher Scientific</td>
			<td>10082147</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Dextran from Leuconostoc spp. (70kDa)</td>
			<td>Sigma-Aldrich</td>
			<td>31390</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Phosphate Buffered Saline (PBS)</td>
			<td>Corning</td>
			<td>21-031-CV</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Hemocytometer</td>
			<td>Hausser Scientific Co.</td>
			<td>3200</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Gel loading tips</td>
			<td>VWR</td>
			<td>37001-152</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">18G Blunt Fill Needle</td>
			<td>BD&#160;</td>
			<td>305180</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">20G Stainless Steel Dispensing Needle</td>
			<td>McMaster-Carr</td>
			<td>75165A123</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Tygon 1/32&#8221; ID, 3/32&#34; OD Silicon Tubing</td>
			<td>Cole-Parmer</td>
			<td>EW-95702-00</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">1/16&#34; Tube-to-tube Coupling</td>
			<td>McMaster-Carr</td>
			<td>5116K165</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">90&#176; Elbow Connectors, Tube-to-Tube</td>
			<td>McMaster-Carr</td>
			<td>5121K901</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Luer Lock Coupling (Female, 1/16&#34; ID)</td>
			<td>McMaster-Carr</td>
			<td>51525K211</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Plastic Forceps, with Jaw Grips</td>
			<td>Electron Microscopy Services</td>
			<td>72971</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Dual Syringe Pump</td>
			<td>Harvard Apparatus</td>
			<td>70-4505</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">5 mL Polystyrene Round-bottom tube</td>
			<td>Fisher Scientific</td>
			<td>14-959-2A</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Device Analysis</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Formaldehyde</td>
			<td>Sigma-Aldrich</td>
			<td>F8775</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Bovine Serum Albumin</td>
			<td>Sigma-Aldrich</td>
			<td>A8806-5G</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Triton X-100</td>
			<td>Sigma-Aldrich</td>
			<td>T-9284</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Rabbit anti-hCD31</td>
			<td>Abcam</td>
			<td>ab32457</td>
			<td>1:25 working dilution</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">FITC conjugated anti-von Willebrand Factor antibody</td>
			<td>Abcam</td>
			<td>ab8822</td>
			<td>1:100 working dilution</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Goat anti-rabbit 568 secondary antibody</td>
			<td>Thermofisher Scientific</td>
			<td>A-11011</td>
			<td>1:100 working dilution</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Hoescht</td>
			<td>Thermofisher Scientific</td>
			<td>H1399</td>
			<td>Resuspended in DMSO</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Sodium cacodylate&#160;</td>
			<td>Sigma-Aldrich</td>
			<td>C0250</td>
			<td>To make 0.2M cacodylate buffer</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Ethanol</td>
			<td>VWR International</td>
			<td>BDH1164-4LP</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">40kDa FITC-conjugated Dextran</td>
			<td>Sigma-Aldrich</td>
			<td>FD40S&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Additional Culture Reagents&#160;</td>
			<td></td>
			<td></td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">CHIR-99021</td>
			<td>Selleck Chem</td>
			<td>S2924</td>
			<td>Small molecule GSK-3 inhibitor</td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Human recombinant VEGF</td>
			<td>Peprotech</td>
			<td>100-20</td>
			<td></td>
		</tr>
		<tr height="20">
			<td height="20" style="height:20px;">Human recombinant bFGF</td>
			<td>Peprotech</td>
			<td>AF-100-18B</td>
			<td></td>
		</tr>
	</tbody>
</table>

micropatterning and assembly of 3d microvessels

Em plataformas in vitro para estudar as células endoteliais e biologia vascular são largamente limitadas à cultura de células endoteliais 2D, câmaras de fluxo com o polímero ou com base substratos de vidro, e ensaios de formação de tubos à base de hidrogel. Estes ensaios, enquanto informativo, não recapitular geometria luz, matriz extracelular adequada, e proximidade multi-celular, que desempenham um papel-chave na modulação da função vascular. Este manuscrito descreve um método de moldagem por injeção para gerar vasos artificiais, com diâmetros da ordem de 100 mm. Microvasos são fabricados semeando células endoteliais em um canal microfluídico incorporado dentro de um tipo nativo I colágeno hidrogel. Ao incorporar nas células do parênquima dentro da matriz de colagénio antes da formação de canal, microambientes específicos de tecido podem ser modelados e estudados. modulações adicionais de propriedades e meios de comunicação hidrodinâmico composição permitir o controlo da função vascular complexa dentro do microambiente desejado.Essa plataforma permite o estudo de recrutamento perivascular de células, as interacções do sangue do endotélio, a resposta de fluxo, e as interacções de tecidos-microvascular. microvasos Engineered oferecer a capacidade de isolar a influência de componentes individuais de um nicho vascular e controlar com precisão as suas químicas, mecânicas e propriedades biológicas para estudar a biologia vascular na saúde e na doença.

O navio-plataforma projetada cria microvasculatura funcional incorporado dentro de um tipo natural de colágeno I matriz e permite um controlo apertado do ambiente celular, biofísicos e bioquímicos in vitro. Para fabricar microvasos modificadas, as células endoteliais da veia umbilical humana (HUVECs) são perfundidos através da rede microfluídicos embebidos em colágeno onde se fixam para formar um lúmen de patentes e endotélio confluentes. Como ilustrado na Figu...

Watch this Scientific Journal Video about Micropatterning and Assembly of 3D Microvessels at JoVE.com

Micropatterning and Assembly of 3D Microvessels

Este manuscrito apresenta um método de moldagem por injeção para engenheiro microvasos que recapitulam propriedades fisiológicas de endotélio. O processo baseado em microfluídico cria redes vasculares 3D patente com condições tailorable, tais como fluxo, composição celular, geometria e gradientes bioquímicos. O processo de fabricação e exemplos de aplicações potenciais são descritos.

Micropatterning e Montagem de microvasos 3D

In vitro platforms to study endothelial cells and vascular biology are largely limited to 2D endothelial cell culture, flow chambers with polymer or glass ...

Research

JoVE Journal

Bioengineering

Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo

Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo

Preparação de 3D colágeno Géis e microcanais para o estudo das interações 3D<em&gt; In Vivo</em

Historically, most cellular processes have been studied in only 2 dimensions.  While these studies have been informative about general cell signaling ...

Bioengenharia

Automated Robotic Liquid Handling Assembly of Modular DNA Devices

Robótico líquido manipulação montagem de dispositivos modulares DNA automática

Recent advances in modular DNA assembly techniques have enabled synthetic biologists to test significantly more of the available &#34;design space&#34; ...

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Síntese de cationizada Magnetoferritin para a magnetização ultra-rápida de Células

Many important biomedical applications, such as cell imaging and remote manipulation, can be achieved by labeling cells with superparamagnetic iron oxide ...

Bioprinting of Cartilage and Skin Tissue Analogs Utilizing a Novel Passive Mixing Unit Technique for Bioink Precellularization

Bioprinting da cartilagem e Analogs de tecido de pele utilizando um romance passiva unidade técnica de mistura para Bioink Precellularization

Bioprinting is a powerful technique for the rapid and reproducible fabrication of constructs for tissue engineering applications. In this study, both ...

Fabrication of Custom Agarose Wells for Cell Seeding and Tissue Ring Self-assembly Using 3D-Printed Molds

Fabricação de poços de Agarose personalizado para a propagação de células e tecido anel Self-assembly usando moldes 3D-impresso

Engineered tissues are being used clinically for tissue repair and replacement, and are being developed as tools for drug screening and human disease ...

Protocols of 3D Bioprinting of Gelatin Methacryloyl Hydrogel Based Bioinks

Protocolos de bioimpressão 3D de bioinks baseados em hidrogel de gelatina

Gelatin methacryloyl (GelMA) has become a popular biomaterial in the field of bioprinting. The derivation of this material is gelatin, which is hydrolyzed ...

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

Montagem controlada por temperatura e caracterização de um Bilayer de interface de gotícula

The droplet interface bilayer (DIB) method for assembling lipid bilayers (i.e., DIBs) between lipid-coated aqueous droplets in oil offers key benefits ...

Control of Cell Geometry through Infrared Laser Assisted Micropatterning

Controle da Geometria Celular através de Micropatterning Assistido por Laser Infravermelho

Micropatterning is an established technique in the cell biology community used to study connections between the morphology and function of cellular ...

A Micropatterning Assay for Measuring Cell Chirality

Um ensaio de micropatterning para medir a quiralidade celular

Chirality is an intrinsic cellular property, which depicts the asymmetry in terms of polarization along the left-right axis of the cell. As this unique ...

Gelatin Methacryloyl Granular Hydrogel Scaffolds: High-throughput Microgel Fabrication, Lyophilization, Chemical Assembly, and 3D Bioprinting

Suportes de hidrogel granular de metacriloíla de gelatina: fabricação de microgel de alto rendimento, liofilização, montagem química e bioimpressão 3D

The emergence of granular hydrogel scaffolds (GHS), fabricated via assembling hydrogel microparticles (HMPs), has enabled microporous scaffold formation ...