Rapid Scanningless 3D Prin2ng: Vision, Status, and...
Transcript of Rapid Scanningless 3D Prin2ng: Vision, Status, and...
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ShaochenChen,PhDProfessorofNanoEngineeringandBioengineering
Co-Director,BiomaterialsandTissueEngineeringCenter(BMTec)Ins>tuteofEngineeringinMedicine(IEM)
ClinicalandTransla>onalResearchIns>tute(CTRI)UniversityofCalifornia,SanDiego
RapidScanningless3DPrin2ng:Vision,Status,andResearchNeeds
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Scanning3DPrin2ngTechnologies
Inject-based Extrusion-based Light-assisted
MurphySVandAtalaA.NatBiotechnol.2014
UVlaser
Mapilli,Lu,Chen,Roy,J.Biomed.Mat.Research(2005)
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Scanningless3DPrin2ngTechnologies
Zhang,Qu,Soman,Hribar,Lee,Chen,He,AdvancedMaterials,2012.
Lu,Mapili,Chen,andRoy,J.BiomedicalMaterialsResearch,2006
Layer-by-layerProjec>onPrin>ng Dynamic,Con>nuousProjec>onPrin>ng
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DLP Printing of Vascular Grafts
Melchiorri,A.J.etal(JohnFisheratUM),AdvHealthcareMater,2015.
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Complex3DArraywithSmoothSidewalls
Zhang,Qu,Soman,Hribar,Lee,Chen,He,AdvancedMaterials,24(31),4266-4270(2012).
Pyramid Spiral Dome Flower
Con>nuousprin>ngiskeytoeliminatear>ficialinterfacesbetweendropsandlayersinnozzle-based3Dprin>ng.
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Continuous Liquid Interface Production
Tumbleston,J.R.etal(JoeDeSimoneatUNC)),Science,2015.
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MaterialsUsedfor3DPrin2ng
• Poly(ethyleneglycol)Diacrylate(PEGDA)– Photo-crosslinkable– Tunablemechanicalproper>es– Nontoxic,non-immunogenic– Canbechemicallymodified(i.e.,RGD,heparansulfates)
• Gela2nMethacrylate(GelMA)– Biodegradable– Celladhesive
• HyaluronicAcid(HA)– Biodegradable– Celladhesiveifcovalentlyfunc>onalizedwithacell-adhesiveprotein(e.g.lamininusingEDC-NHS)
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Cell Alignment on Stiffness-Patterned Hydrogel Day 6
100um
Day 43hrs Day 2
Patterns
Invitrocellmigra>on.A7R5smoothmusclecellsshowmigra>ontothes>fferregionspa`ernedbythedigitalplasmonicpa`erningmethod.
Fluorescentstainingshowstheirac>n(red)andnuclei(cyan).
Wen,Vincent,Choi,Fuhrmann,Hribar,Chen,Engler,NatureMaterials,13,979-987,2014Hribar,Choi,Ondeck,Engler,Chen,AdvancedFunc?onalMaterials,24,4922-4926,2014
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Nanopar2cles-enabled3DDetoxifica2on
Gou,Qu,Zhu,Xiang,Yang,Zhang,Wei,andChen,NatureCommunica?ons,5:3774,2014
Polydiacetylene(PDA)nanopar>cles(green)areinstalledinPEGDAhydrogelmatrix(grey)withliver-mime>c3Dstructurefabricatedby3Dprin>ng.ThePDANPscana`ract,captureandsensetoxins(red),whilethe3Dmatrixwithmodifiedliverlobulestructureallowstoxinstobetrappedefficiently.
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Liver-mimic3DDetoxifica2on
Gou,Qu,Zhu,Xiang,Yang,Zhang,Wei,andChen,NatureCommunica?ons,5:3774,2014
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3D-printed Artificial Micro-fish
Zhu et al, Advanced Materials, 27, 4411 (2015)
Fish-shapedmicrorobots• Swiminliquids• Chemicallypowered• Magne>callyguided• Detoxifythetoxins
Inside Cover Image
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3D-printed Micro-fish to Remove Toxin
Zhu et al, Advanced Materials, 27, 4411 (2015) Press report by The Wall Street Journal, The Washington Post, Forbes, BBC News, etc
Nano-robots:• Self-propelled• Sensing• Drugdelivery• Nano-surgery
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Cells: hiPSC-HPCs Hydrogel: GelMA
3DBioprin2ngofHumanLiverTissues
MaXetal.PNAS.Vol.113(8),2208-2211,2016
Printed in 1 second
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Cells: HUVEC and ADSC Hydrogel: GelMA with HA
Two-StepBioprin2ng
MaXetal.PNAS.Vol.113(8),2208-2211,2016
Printed in 1 second
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hiPSC-HPCs HUVEC and ADSC Merge Bright Field
BioprintedHepa2cConstruct
3D reconstruction
MaXetal.PNAS.Vol.113(8),2208-2211,2016
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PaQernMaintenancePost-prin2ng
Day
1
Day
3
Day
7
Day
10
hiPSC-HPCs HUVEC and ADSC Merge Bright Field
MaXetal.PNAS.Vol.113(8),2208-2211,2016
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Liver-specificGenesandFunc2ons
ALB-albumin;HNF4a-hepatocytenuclearfactor4alphaTTR-transthyre>n;AFP-fetalhepa>cmarkeralpha-fetoprotein
MaXetal.PNAS.Vol.113(8),2208-2211,2016
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ExpressionLevelsofKeyEnzymesinDrugTes2ng
• hiPSC-HPCsin3DtriculturehavethehighestaverageexpressionlevelsofCYPs• Rifampicin(an>bio>cs)trea>ngledtosignificantincreaseinCYP3A4,2C9,2C19
in3Dtriculture,butnotin2Dor3D-HPConlymodels.
MaXetal.PNAS.Vol.113(8),2208-2211,2016
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Summary
Ø Light-basedscanningless3Dprin>ngapproachesofferarapidprin>ngspeedwithmicroscaleresolu>on.
Ø BioPrin>ngallowsdirect-writeof3D,novel,biomime>cbiologicalscaffoldswithcontrolofchemical,biological,andmechanicalproper>es:
-porosity,shape,s>ffness,Poissonra>o-chemicalcomposi>on-cellencapsula>on
Ø Avarietyofbiopolymers(e.g.PEG,GelMA,HA)canbeusedforprecision>ssuemodels(invivoandinvitro)
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GapsandResearchNeeds
Ø Mul>plematerialsparallelprin>ng,Ø Mul>plecellscon>nuousprin>ng
Ø Developviablecollabora>onwithmedicaldoctorandbiologistsØ Developnovelbiomaterialsfor>ssueengineeringand
regenera>vemedicineØ Developeffec>vevasculariza>onstrategiestokeepengineered
>ssuesaliveØ High-throughputmanufacturing
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ScienceOutreach:1-secondPhoto
Highschoolstudentsinthehydrogel(pictureswithpermission)
ItalianNa>onalTVProducer Publictalkshowforbioprin>ng