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Chen Z, Fan L, Chen S, Zhao H, Zhang Q, Qu Y, Huang Y, Yu X, Sun D. Artificial Vascular with Pressure-Responsive Property based on Deformable Microfluidic Channels. Adv Healthc Mater 2024; 13:e2304532. [PMID: 38533604 DOI: 10.1002/adhm.202304532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 03/18/2024] [Indexed: 03/28/2024]
Abstract
In vitro blood vessel models are significant for disease modeling, drug assays, and therapeutic development. Microfluidic technologies allow to create physiologically relevant culture models reproducing the features of the in vivo vascular microenvironment. However, current microfluidic technologies are limited by impractical rectangular cross-sections and single or nonsynchronous compound mechanical stimuli. This study proposes a new strategy for creating round-shaped deformable soft microfluidic channels to serve as artificial in vitro vasculature for developing in vitro models with vascular physio-mechanical microenvironments. Endothelial cells seeded into vascular models are used to assess the effects of a remodeled in vivo mechanical environment. Furthermore, a 3D stenosis model is constructed to recapitulate the flow disturbances in atherosclerosis. Soft microchannels can also be integrated into traditional microfluidics to realize multifunctional composite systems. This technology provides new insights into applying microfluidic chips and a prospective approach for constructing in vitro blood vessel models.
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Affiliation(s)
- Zhenlin Chen
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
- Hong Kong Center for Cerebra-Cardiovascular Health Engineering, Hong Kong Science Park, New Territories, Hong Kong, 999077, China
| | - Lei Fan
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
- Centre for Robotics and Automation, Shenzhen Research Institute of City University of Hong Kong, Shenzhen, 518057, China
| | - Shuxun Chen
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Han Zhao
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Qiang Zhang
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Yun Qu
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Ya Huang
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Xinge Yu
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
- Hong Kong Center for Cerebra-Cardiovascular Health Engineering, Hong Kong Science Park, New Territories, Hong Kong, 999077, China
| | - Dong Sun
- Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China
- Hong Kong Center for Cerebra-Cardiovascular Health Engineering, Hong Kong Science Park, New Territories, Hong Kong, 999077, China
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Parween S, Asthana A, Nahar P. Fundamentals of Image-Based Assay (IBA) System for Affordable Point of Care Diagnostics. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Radiom M, He Y, Peng-Wang J, Baeza-Squiban A, Berret JF, Chen Y. Alveolar mimics with periodic strain and its effect on the cell layer formation. Biotechnol Bioeng 2020; 117:2827-2841. [PMID: 32542664 DOI: 10.1002/bit.27458] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 04/09/2020] [Accepted: 06/13/2020] [Indexed: 12/16/2022]
Abstract
We report on the development of a new model of alveolar air-tissue interface on a chip. The model consists of an array of suspended hexagonal monolayers of gelatin nanofibers supported by microframes and a microfluidic device for the patch integration. The suspended monolayers are deformed to a central displacement of 40-80 µm at the air-liquid interface by application of air pressure in the range of 200-1,000 Pa. With respect to the diameter of the monolayers, that is, 500 µm, this displacement corresponds to a linear strain of 2-10% in agreement with the physiological strain range in the lung alveoli. The culture of A549 cells on the monolayers for an incubation time of 1-3 days showed viability in the model. We exerted a periodic strain of 5% at a frequency of 0.2 Hz for 1 hr to the cells. We found that the cells were strongly coupled to the nanofibers, but the strain reduced the coupling and induced remodeling of the actin cytoskeleton, which led to a better tissue formation. Our model can serve as a versatile tool in lung investigations such as in inhalation toxicology and therapy.
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Affiliation(s)
- Milad Radiom
- Laboratoire Matière et Systèmes Complexes, CNRS UMR 7057, Université Paris Diderot Paris-VII, Paris, France
| | - Yong He
- Département de Chimie, Sorbonne Universités-UPMC Univ Paris 06, CNRS UMR 8640, Pasteur, École Normale Supérieure-PSL Research University, Paris, France
| | - Juan Peng-Wang
- Département de Chimie, Sorbonne Universités-UPMC Univ Paris 06, CNRS UMR 8640, Pasteur, École Normale Supérieure-PSL Research University, Paris, France
| | - Armelle Baeza-Squiban
- Unité de Biologie Fonctionnelle et Adaptative, CNRS UMR 8251, Université Paris Diderot Paris-VII, Paris, France
| | - Jean-François Berret
- Laboratoire Matière et Systèmes Complexes, CNRS UMR 7057, Université Paris Diderot Paris-VII, Paris, France
| | - Yong Chen
- Département de Chimie, Sorbonne Universités-UPMC Univ Paris 06, CNRS UMR 8640, Pasteur, École Normale Supérieure-PSL Research University, Paris, France
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Amirsolaimani B, Peyman G, Schwiegerling J, Bablumyan A, Peyghambarian N. A new low-cost, compact, auto-phoropter for refractive assessment in developing countries. Sci Rep 2017; 7:13990. [PMID: 29070904 PMCID: PMC5656604 DOI: 10.1038/s41598-017-14507-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 10/11/2017] [Indexed: 11/13/2022] Open
Abstract
Using a phoropter to measure the refractive error is one of the most commonly used methods by ophthalmologists and optometrists. Here, we demonstrate design and fabrication of a portable automatic phoropter with no need for patient’s feedback. The system is based on three tunable-focus fluidic lenses and thin-film holographic optical elements to perform automatic refractive error measurement and provide a diagnostic prescription without supervision. Three separate lenses are deployed to correct the defocus and astigmatism. The refractive error is measured using a Shack-Hartmann wavefront sensor that calculates the Zernike values of an infrared wavefront emerging from the eye. Holographic optical elements steer the emerging wavefront into the wavefront sensor, while simultaneously providing an unobstructed view for the subject. The power of each lens is controlled by pumping a liquid in and out of the lens chamber using servo motor actuated diaphragm pumps. Spherical and cylindrical correction range of −10 to +10 diopters with 0.1 diopter increments is achieved in less than 15 seconds using wavefront sensor feedback to the pumps. This system can be used in rapid screening of large patient populations especially in the developing countries that lack sufficient facilities and specialist doctors.
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Affiliation(s)
| | - Gholam Peyman
- College of Optical Sciences, University of Arizona, Tucson, AZ, 85721, USA
| | - Jim Schwiegerling
- College of Optical Sciences, University of Arizona, Tucson, AZ, 85721, USA
| | | | - N Peyghambarian
- College of Optical Sciences, University of Arizona, Tucson, AZ, 85721, USA.,TIPD, LLC, 1430 N. 6th Ave, Tucson, AZ, 85705, USA
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