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Zhu X, Wu Q, He Y, Gao M, Li Y, Peng W, Li S, Liu Y, Zhang R, Bao J. Fabrication of Size-Controllable and Arrangement-Orderly HepG2 Spheroids for Drug Screening via Decellularized Liver Matrix-Derived Micropattern Array Chips. ACS OMEGA 2022; 7:2364-2376. [PMID: 35071924 PMCID: PMC8772313 DOI: 10.1021/acsomega.1c06302] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/20/2021] [Indexed: 02/08/2023]
Abstract
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Three-dimensional
(3D) culture via micropattern arrays to generate
cellular spheroids seems a promising in vitro biomimetic
system for liver tissue engineering applications, such as drug screening.
Recently, organ-derived decellularized extracellular matrix emerges
as arguably the most biomimetic bioink. Herein, decellularized liver
matrix (DLM)-derived micropattern array chips were developed to fabricate
size-controllable and arrangement-orderly HepG2 spheroids for drug
screening. The porcine DLM was obtained by the removal of cellular
components and then ground into powder, followed by enzymolysis. DLM
as a coating substrate was compared with collagen type I (Col I) and
Matrigel in terms of biological performance for enhancing cell adhesion,
proliferation, and functions. Subsequently, we used poly(dimethylsiloxane)
(PDMS) to adsorb DLM as the bioink to fabricate micropattern array
chips. The optimal shape and size of micropattern were determined
by evaluating the morphology, viability, and functions of HepG2 3D
cellular aggregates. In addition, drug-susceptibility testing (paclitaxel,
doxorubicin HCl, and disulfiram) was performed on this novel platform.
The DLM provided the tissue-specific microenvironment that provided
suitable supports for HepG2 cells, compared to Col I and Matrigel.
A circular micropattern with a diameter of 100 μm was the optimal
processing parameter to rapidly fabricate large-scale, size-controllable,
and arrangement-orderly HepG2 cellular aggregates with 3D spheroid’s
shape and high cell viability. Drug screening testing showed that
the effect of a drug could be directly demonstrated on-chip by confocal
microscopy measuring the viability of spheroids. We provide a novel
platform for the large-scale generation of HepG2 spheroids with uniform
size and arrangement, thus bringing convenience, reducing error, and
increasing reproducibility for a rapid drug discovery by fluorescence
quantitative analysis. This methodology may be possible to apply in
advancing personalized medicine and drug discovery.
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Affiliation(s)
- Xinglong Zhu
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Qiong Wu
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.,Laboratory of Liver Transplantation, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yuting He
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Mengyu Gao
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.,Department of Pathology, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yi Li
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.,Precision Medicine Key Laboratory, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Wanliu Peng
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Shengfu Li
- Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yong Liu
- Department of Burn and Plastic Surgery, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Rundong Zhang
- West China School of Medicine, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Ji Bao
- Institute of Clinical Pathology, Key Laboratory of Transplant Engineering and Immunology, NHC, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
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Introduction to glass microstructuring techniques. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2013; 949:125-40. [PMID: 23329440 DOI: 10.1007/978-1-62703-134-9_9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In this chapter an overview of manufacturing methods, leading to the fabrication of microstructures in glass substrates, is presented. Glass is a material of excellent optical properties, a very good electric insulator, biocompatible and chemically stable. In addition to its intrinsic qualities, glass can be processed with the use of manufacturing methods originating from the microelectronic industry. In this text two complete manufacturing protocols are described, each composed of standard microfabrication steps; namely, the deposition of masking layers, photolithographic patterning and pattern transfer via wet or dry etching. As a result, a set of building blocks is provided, allowing the manufacture of various microfluidic components that are frequently used in the domain of micro-total analysis system technology.
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Ricoult SG, Goldman JS, Stellwagen D, Juncker D, Kennedy TE. Generation of microisland cultures using microcontact printing to pattern protein substrates. J Neurosci Methods 2012; 208:10-7. [PMID: 22561087 DOI: 10.1016/j.jneumeth.2012.04.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 04/18/2012] [Accepted: 04/19/2012] [Indexed: 11/25/2022]
Abstract
The capacity to isolate small numbers of neurons in vitro is an essential tool to study the cell biology of synapses and the development of neuronal networks by specific cell types. Microisland culture assays allow for single neurons, or simple neural networks, to be isolated on islands of glial cells; however, the techniques commonly used to produce microisland substrates are expensive, challenging to control, and typically result in many discarded substrates. Here, we used microcontact printing to pattern a glass surface with islands of extracellular matrix proteins known to support neural cell growth and differentiation. To promote segregation of the cells to the islands, the substrate surrounding the islands was backfilled with polyethylene glycol (PEG), forming a relatively non-permissive surface on which cell attachment is limited. Astrocytes, and subsequently hippocampal neurons, were then seeded onto the islands of patterned protein. Using this method, readily reproducible patterns of protein islands were produced that permit cell attachment, differentiation, and growth. The technique is a rapid, inexpensive, and reliable means to generate patterned substrates appropriate for microisland cultures.
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Affiliation(s)
- Sébastien G Ricoult
- McGill Program in NeuroEngineering, Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University Ave., Montreal, Quebec H3A 2B4, Canada
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