1
|
On-Chip Construction of Multilayered Hydrogel Microtubes for Engineered Vascular-Like Microstructures. MICROMACHINES 2019; 10:mi10120840. [PMID: 31805688 PMCID: PMC6953073 DOI: 10.3390/mi10120840] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Revised: 11/27/2019] [Accepted: 11/30/2019] [Indexed: 12/30/2022]
Abstract
Multilayered and multicellular structures are indispensable for constructing functional artificial tissues. Engineered vascular-like microstructures with multiple layers are promising structures to be functionalized as artificial blood vessels. In this paper, we present an efficient method to construct multilayer microtubes embedding different microstructures based on direct fabrication and assembly inside a microfluidic device. This four-layer microfluidic device has two separate inlets for fabricating various microstructures. We have achieved alternating-layered microtubes by controlling the fabrication, flow, and assembly time of each microstructure, and as well, double-layered microtubes have been built by a two-step assembly method. Modifications of both the inner and outer layers was successfully demonstrated, and the flow conditions during the on-chip assembly were evaluated and optimized. Each microtube was successfully constructed within several minutes, showing the potential applications of the presented method for building engineered vascular-like microstructures with high efficiency.
Collapse
|
3
|
Kaynak M, Ozcelik A, Nama N, Nourhani A, Lammert PE, Crespi VH, Huang TJ. Acoustofluidic actuation of in situ fabricated microrotors. LAB ON A CHIP 2016; 16:3532-7. [PMID: 27466140 PMCID: PMC5007211 DOI: 10.1039/c6lc00443a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We have demonstrated in situ fabricated and acoustically actuated microrotors. A polymeric microrotor with predefined oscillating sharp-edge structures is fabricated in situ by applying a patterned UV light to polymerize a photocrosslinkable polyethylene glycol solution inside a microchannel around a polydimethylsiloxane axle. To actuate the microrotors by oscillating the sharp-edge structures, we employed piezoelectric transducers which generate tunable acoustic waves. The resulting acoustic streaming flows rotate the microrotors. The rotation rate is tuned by controlling the peak-to-peak voltage applied to the transducer. A 6-arm microrotor can exceed 1200 revolutions per minute. Our technique is an integration of single-step microfabrication, instant assembly around the axle, and easy acoustic actuation for various applications in microfluidics and microelectromechanical systems (MEMS).
Collapse
Affiliation(s)
- Murat Kaynak
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Adem Ozcelik
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Nitesh Nama
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
| | - Amir Nourhani
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Paul E. Lammert
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
| | - Vincent H. Crespi
- Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
- Tel:814 863-0163;
| | - Tony Jun Huang
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, 16802 USA
- Fax: 814-865-9974; Tel: 814-863-4209;
| |
Collapse
|
4
|
Yue T, Park KH, Reese BE, Zhu H, Lyon S, Ma J, Mohler PJ, Zhang M. Quantifying Drug-Induced Nanomechanics and Mechanical Effects to Single Cardiomyocytes for Optimal Drug Administration To Minimize Cardiotoxicity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1909-19. [PMID: 26738425 PMCID: PMC6083215 DOI: 10.1021/acs.langmuir.5b04314] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Contrary to the well-studied dynamics and mechanics at organ and tissue levels, there is still a lack of good understanding for single cell dynamics and mechanics. Single cell dynamics and mechanics may act as an interface to provide unique information reflecting activities at the organ and tissue levels. This research was aimed at quantifying doxorubicin- and dexrazoxane-induced nanomechanics and mechanical effects to single cardiomyocytes, to reveal the therapeutic effectiveness of drugs at the single cell level and to optimize drug administration for reducing cardiotoxicity. This work employed a nanoinstrumentation platform, including a digital holographic microscope combined with an atomic force microscope, which can characterize cell stiffness and beating dynamics in response to drug exposures in real time and obtain time-dose-dependent effects of cardiotoxicity and protection. Through this research, an acute increase and a delayed decrease of surface beating force induced by doxorubicin was characterized. Dexrazoxane treated cells maintained better beating force and mechanical functions than cells without any treatment, which demonstrated cardioprotective effects of dexrazoxane. In addition, combined drug effects were quantitatively evaluated following various drug administration protocols. Preadministration of dexrazoxane was demonstrated to have protective effects against doxorubicin, which could lead to better strategies for cardiotoxicity prevention and anticancer drug administration. This study concluded that quantification of nanomechanics and mechanical effects at the single cell level could offer unique insights of molecular mechanisms involved in cellular activities influencing organ and tissue level responses to drug exposure, providing a new opportunity for the development of effective and time-dose-dependent strategies of drug administration.
Collapse
Affiliation(s)
- Tao Yue
- Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Ki Ho Park
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
- Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
| | - Benjamin E. Reese
- Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Hua Zhu
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
- Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
| | - Seth Lyon
- Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Jianjie Ma
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
- Department of Surgery, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
| | - Peter J. Mohler
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
| | - Mingjun Zhang
- Department of Biomedical Engineering, The Ohio State University, Columbus, Ohio 43210, United States
- Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio 43210, United States
- Interdisciplinary Biophysics Graduate Program, The Ohio State University, Columbus, Ohio 43210, United States
- Corresponding Author:
| |
Collapse
|