Journal article
Hetero-cellular prototyping by synchronized multi-material bioprinting for rotary cell culture system
Biofabrication, v 8(1), pp 015002/1-015002/15
01 Mar 2016
PMID: 26759993
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Bottom-up tissue engineering requires methodological progress of biofabrication to capture key design facets of anatomical arrangements across micro, meso and macro-scales. The diffusive mass transfer properties necessary to elicit stability and functionality require hetero-typic contact, cell-to-cell signaling and uniform nutrient diffusion. Bioprinting techniques successfully build mathematically defined porous architecture to diminish resistance to mass transfer. Current limitations of bioprinted cell assemblies include poor micro-scale formability of cell-laden soft gels and asymmetrical macro-scale diffusion through 3D volumes. The objective of this work is to engineer a synchronized multi-material bioprinter (SMMB) system which improves the resolution and expands the capability of existing bioprinting systems by packaging multiple cell types in heterotypic arrays prior to deposition. This unit cell approach to arranging multiple cell-laden solutions is integrated with a motion system to print heterogeneous filaments as tissue engineered scaffolds and nanoliter droplets. The set of SMMB process parameters control the geometric arrangement of the combined flow's internal features and constituent material's volume fractions. SMMB printed hepatocyte-endothelial laden 200 nl droplets are cultured in a rotary cell culture system (RCCS) to study the effect of microgravity on an in vitro model of the human hepatic lobule. RCCS conditioning for 48 h increased hepatocyte cytoplasm diameter 2 mu m, increased metabolic rate, and decreased drug half-life. SMMB hetero-cellular models present a 10-fold increase in metabolic rate, compared to SMMB mono-culture models. Improved bioprinting resolution due to process control of cell-laden matrix packaging as well as nanoliter droplet printing capability identify SMMB as a viable technique to improve in vitro model efficacy.
Metrics
Details
- Title
- Hetero-cellular prototyping by synchronized multi-material bioprinting for rotary cell culture system
- Creators
- Jessica Snyder - Drexel UniversityAe Rin Son - Drexel UniversityQudus Hamid - Drexel UniversityHonglu Wu - Johnson Space CenterWei Sun - Tsinghua University
- Publication Details
- Biofabrication, v 8(1), pp 015002/1-015002/15
- Publisher
- Iop Publishing Ltd
- Number of pages
- 15
- Grant note
- National Space Biomedical Research Institute's Summer Intern Program
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000373289000006
- Scopus ID
- 2-s2.0-84958955811
- Other Identifier
- 991019167663104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Engineering, Biomedical
- Materials Science, Biomaterials