1
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Jeong H, Lee J, Kim S, Moon H, Hong S. Site-specific fabrication of a melanin-like pigment through spatially confined progressive assembly on an initiator-loaded template. Nat Commun 2023; 14:3432. [PMID: 37301846 DOI: 10.1038/s41467-023-38622-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 05/10/2023] [Indexed: 06/12/2023] Open
Abstract
Melanin-like nanomaterials have emerged in surface biofunctionalization in a material-independent manner due to their versatile adhesion arising from their catechol-rich structures. However, the unique adhesive properties of these materials ironically raise difficulties in their site-specific fabrication. Here, we report a method for site-specific fabrication and patterning of melanin-like pigments, using progressive assembly on an initiator-loaded template (PAINT), different from conventional lithographical methods. In this method, the local progressive assembly could be naturally induced on the given surface pretreated with initiators mediating oxidation of the catecholic precursor, as the intermediates generated from the precursors during the progressive assembly possess sufficient intrinsic underwater adhesion for localization without diffusion into solution. The pigment fabricated by PAINT showed efficient NIR-to-heat conversion properties, which can be useful in biomedical applications such as the disinfection of medical devices and cancer therapies.
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Affiliation(s)
- Haejin Jeong
- Department of Physics and Chemistry, DGIST, Daegu, 42988, Republic of Korea
| | - Jisoo Lee
- Department of Physics and Chemistry, DGIST, Daegu, 42988, Republic of Korea
| | - Seunghwi Kim
- Department of Physics and Chemistry, DGIST, Daegu, 42988, Republic of Korea
| | - Haeram Moon
- Department of Physics and Chemistry, DGIST, Daegu, 42988, Republic of Korea
| | - Seonki Hong
- Department of Physics and Chemistry, DGIST, Daegu, 42988, Republic of Korea.
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2
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Shi L, Chen J, Tian Y, Ren L. Hydroxyapatite gradient on poly (vinyl alcohol) hydrogels surface to mimic calcified cartilage zone for cartilage repair. J Biomater Appl 2022; 36:1579-1587. [DOI: 10.1177/08853282211073854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Poly (vinyl alcohol) (PVA) hydrogels are considered promising artificial articular cartilage. However, the weak attachment between PVA hydrogels and subchondral bone limit its application in the biomedical field. In this article, we present a new method to improve the mineralization of PVA hydrogels, and fabricate PVA hydrogels with continuously graded hydroxyapatite coating. The surface of the hydrogels was modified by dopamine self-polymerization and alendronate conjugation subsequently. Based on these, we used simulated body fluids to mineralize the hydrogels to mimic calcified cartilage zone. The modified surface of the PVA hydrogels showed excellent mineralization ability with continuously graded hydroxyapatite (HA). As the main component of human bones, HA can be chemically bonded body tissue on the interface, showing great biological activity. With the content of HA increasing, the cell adhesion ability of the hydrogels was enhanced, which helped the hydrogels integrate tightly with subchondral bone. These results demonstrate that the modified hydrogels could be promising substitutes for articular cartilage.
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Affiliation(s)
- Lin Shi
- Guangdong Food and Drug Vocational College, Guangzhou, China
| | - Jiongrun Chen
- National Engineering Research Centre for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China
| | - Ye Tian
- Guangdong Food and Drug Vocational College, Guangzhou, China
| | - Li Ren
- National Engineering Research Centre for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, China
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3
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Li L, Chen Y, Wang H, An G, Wu H, Huang W. A high-throughput, open-space and reusable microfluidic chip for combinational drug screening on tumor spheroids. LAB ON A CHIP 2021; 21:3924-3932. [PMID: 34636818 DOI: 10.1039/d1lc00525a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Screening drug combinations using tumor spheroids can play a vital role in the development of disease treatment and personalized medicine. However, current studies focus on drug gradients or combinations of two drugs in most cases, and it is difficult to find complex therapeutic combinations involving more drugs. The use of design-of-experiment (DOE) microfluidics is a potential strategy to study this area systematically. Here we develop a high-throughput, open-space multilayered PMMA microfluidic chip for combinational drug screening on tumor spheroids. This microchip is straightforward to fabricate, compatible with standard spheroid cultures, and friendly for end-users. The device consists of an inlet layer and multiple dispersing layers. In the inlet layer, different samples can be loaded into the chip simultaneously. The sample solutions flow into the dispersing layers to generate various combinations based on the specific DOE principle. We demonstrated that the chip performance is in quantitative agreement with the design, using water and doxycycline combinations as models. As a proof-of-concept study, we constructed a HeLa reporter cell line to quantify the autophagy of tumor spheroids and used the chip to identify critical factors relating to the growth of the spheroids. Specifically, we used L-glutamine, D-glucose, FBS, and cisplatin as the factors and studied the autophagy, growth curves, and spheroid sizes in response to different combinations of the four factors. We found that D-glucose can inhibit the effects of cisplatin on tumor spheroids, and cisplatin caused severe autophagy in 3D tumor spheroids compared to 2D monoculture cells. Our method has the potential to allow more drug combinations to be examined, and it can be extended to DOE approaches with seven or more inputs.
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Affiliation(s)
- Lijun Li
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077, Hong Kong, China.
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
| | - Yan Chen
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
| | - Huirong Wang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
| | - Geng An
- Department of Obstetrics and Gynecology, Center for Reproductive Medicine, Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, Guangdong, China
| | - Hongkai Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, 999077, Hong Kong, China.
- The Hong Kong University of Science and Technology Shenzhen Research Institute, Shenzhen, 518057, Guangdong, China
| | - Wei Huang
- Department of Biology, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China.
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4
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Tang Q, Yang X, Xuan C, Wu K, Lai C, Shi X. Generation of microfluidic gradients and their effects on cells behaviours. Biodes Manuf 2020. [DOI: 10.1007/s42242-020-00093-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Tang Q, Li X, Lai C, Li L, Wu H, Wang Y, Shi X. Fabrication of a hydroxyapatite-PDMS microfluidic chip for bone-related cell culture and drug screening. Bioact Mater 2020; 6:169-178. [PMID: 32913926 PMCID: PMC7453124 DOI: 10.1016/j.bioactmat.2020.07.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/14/2020] [Accepted: 07/22/2020] [Indexed: 12/14/2022] Open
Abstract
Bone is an important part of the human body structure and plays a vital role in human health. A microfluidic chip that can simulate the structure and function of bone will provide a platform for bone-related biomedical research. Hydroxyapatite (HA), a bioactive ceramic material, has a similar structure and composition to bone mineralization products. In this study, we used HA as a microfluidic chip component to provide a highly bionic bone environment. HA substrates with different microchannel structures were printed by using ceramic stereolithography (SLA) technology, and the minimum trench width was 50 μm. The HA substrate with microchannels was sealed by a thin polydimethylsiloxane (PDMS) layer to make a HA-PDMS microfluidic chip. Cell culture experiments demonstrated that compared with PDMS, HA was more conducive to the proliferation and osteogenic differentiation of the human foetal osteoblast cell line (hFOB). In addition, the concentration gradient of the model drug doxorubicin hydrochloride (DOX) was successfully generated on a Christmas tree structure HA-PDMS chip, and the half maximal inhibitory concentration (IC50) of DOX was determined. The findings of this study indicate that the HA-PDMS microfluidic chip has great potential in the field of high-throughput bone-related drug screening and bone-related research. 3D printing of the hydroxyapatite (HA) substrate with microchannel networks. Fabrication of HA-PDMS microfluidic chips. (3) Provided a new microfluidic platform for studying bone and bone-related diseases.
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Affiliation(s)
- Qiangqiang Tang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, PR China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China
| | - Xiaoyu Li
- School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, PR China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China
| | - Chen Lai
- Peking University Shenzhen Institute, Peking University, Shenzhen, 518055, PR China
| | - Lei Li
- CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, PR China
| | - Hongkai Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
| | - Yingjun Wang
- Key Laboratory of Biomedical Engineering of Guangdong Province, South China University of Technology, Guangzhou, 510006, PR China.,Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education, South China University of Technology, Guangzhou, 510006, PR China
| | - Xuetao Shi
- Peking University Shenzhen Institute, Peking University, Shenzhen, 518055, PR China.,School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, PR China.,National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou, 510006, PR China.,Guangzhou Regenerative Medicine and Health Guangdong Laboratory, 510005, Guangzhou, PR China
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6
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Lee HA, Ma Y, Zhou F, Hong S, Lee H. Material-Independent Surface Chemistry beyond Polydopamine Coating. Acc Chem Res 2019; 52:704-713. [PMID: 30835432 DOI: 10.1021/acs.accounts.8b00583] [Citation(s) in RCA: 196] [Impact Index Per Article: 39.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Various methods have been developed in surface chemistry to control interface properties of a solid material. A selection rule among surface chemistries is compatibility between a surface functionalization tool and a target material. For example, alkanethiol deposition on noble metal surfaces, widely known as the formation of a self-assembled monolayer (SAM), cannot be performed on oxide material surfaces. One must choose organosilane molecules to functionalize oxide surfaces. Thus, the surface chemistry strictly depends on the properties of the surface. Polydopamine coating is now generally accepted as the first toolbox for functionalization of virtually any material surface. Layer-by-layer (LbL) assembly is a widely used method to modify properties of versatile surfaces, including organic materials, metal oxides, and noble metals, along with polydopamine coating. On flat solid substrates, the two chemistries of polydopamine coating and LbL assembly provide similar levels of surface modifications. However, there are additional distinct features in polydopamine. First, polydopamine coating is effective for two- or three-dimensional porous materials such as metal-organic frameworks (MOFs), synthetic polyolefin membranes, and others because small-sized dopamine (MW = 153.18 u) and its oxidized oligomers are readily attached onto narrow-spaced surfaces without exhibiting steric hindrance. In contrast, polymers used in LbL assembly are slow in diffusion because of steric hindrance due to their high molecular weight. Second, it is applicable to structurally nonflat surfaces showing special wettability such as superhydrophobicity or superoleophobicity. Third, a nonconducting, insulating polydopamine layer can be converted to be a conducting layer by pyrolysis. The product after pyrolysis is a N-doped graphene-like material that is useful for graphene or carbon nanotube-containing composites. Fourth, it is a suitable method for engineering the surface properties of various composite materials. The surface properties of participating components in composite materials can be unified by polydopamine coating with a simple one-step process. Fifth, a polydopamine layer exhibits intrinsic chemical reactivity by the presence of catecholquinone moieties and catechol radical species on surfaces. Nucleophiles such as amine and thiolate spontaneously react with the functionalized layer. Applications of polydopamine coating are exponentially growing and include cell culture/patterning, microfluidics, antimicrobial surfaces, tissue engineering, drug delivery systems, photothermal therapy, immobilization of photocatalysts, Li-ion battery membranes, Li-sulfur battery cathode materials, oil/water separation, water detoxification, organocatalysts, membrane separation technologies, carbonization, and others. In this Account, we describe various polydopamine coating methods and then introduce a number of chemical derivatives of dopamine that will open further development of material-independent surface chemistry.
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Affiliation(s)
- Haesung A. Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 University Road, Daejeon 34141, South Korea
| | - Yanfei Ma
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
- State Key Laboratory of Solidification Processing, College of Materials Science and Technology, Northwestern Polytechnical University, 127 YouyiXi Road, Xi’an 710072, China
| | - Seonki Hong
- Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Daegu 42988, South Korea
| | - Haeshin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 University Road, Daejeon 34141, South Korea
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7
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Zhao MX, Li J, Gao X. Gradient Coating of Polydopamine via CDR. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:6727-6731. [PMID: 28657319 DOI: 10.1021/acs.langmuir.7b01463] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Surfaces with gradient properties are of central importance for a number of chemical and biological processes. Here, we report rapid generation of a polydopamine (PDA) gradient on hydrophobic surfaces by a simple, low cost, and general technology, cyclic draining-replenishing (CDR). Due to the unique surface chemistry of PDA, it enables continuous and precise control of surface wettability and subsequent deposition of organic and inorganic compounds. Using kanamycin as a model compound, we show that the gradient PDA membrane potentially can be used to prepare minimum inhibitory concentration (MIC) test strips for quantifying resistance of antimicrobial agents from microorganisms. Because CDR is experimentally simple, scalable, fast, and does not require specialized reagents or instruments, we envision this platform can be easily adopted to create a variety of functional surfaces.
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Affiliation(s)
- Mei-Xia Zhao
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
- Key Laboratory of Natural Medicine and Immune-Engineering of Henan Province, Henan University , Kaifeng 475004, China
| | - Junwei Li
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
| | - Xiaohu Gao
- Department of Bioengineering, University of Washington , Seattle, Washington 98195, United States
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8
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Shakeri A, Sun N, Badv M, Didar TF. Generating 2-dimensional concentration gradients of biomolecules using a simple microfluidic design. BIOMICROFLUIDICS 2017; 11:044111. [PMID: 28852431 PMCID: PMC5552394 DOI: 10.1063/1.4991550] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 07/26/2017] [Indexed: 05/21/2023]
Abstract
This study reports a microfluidic device for generating 2-dimensional concentration gradients of biomolecules along the width and length of a chamber and conventional 1-dimensional gradients along the width of its lateral parallel channels. The gradient profile can be precisely controlled by the applied flow rate. The proposed design is simple and straightforward, has a small footprint size compared to previously reported devices such as tree-shape designs, and for the first time, provides capability of generating desired 2D and 1D gradients, simultaneously. The finite element simulation analysis proves the feasibility of the microfluidic device, and the fluorescently labelled IgG antibody is used to demonstrate generated chemical gradients. This simple microfluidic device can be implemented for a wide range of high-throughput concentration gradient applications such as chemotaxis, drug screening, and organs-on-chips.
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Affiliation(s)
- Amid Shakeri
- Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Nick Sun
- Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Maryam Badv
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
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9
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Salehi S, Ostrovidov S, Ebrahimi M, Sadeghian RB, Liang X, Nakajima K, Bae H, Fujie T, Khademhosseini A. Development of Flexible Cell-Loaded Ultrathin Ribbons for Minimally Invasive Delivery of Skeletal Muscle Cells. ACS Biomater Sci Eng 2017; 3:579-589. [PMID: 33429625 DOI: 10.1021/acsbiomaterials.6b00696] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Cell transplantation therapy provides a potential solution for treating skeletal muscle disorders, but cell survival after transplantation is poor. This limitation could be addressed by grafting donor cells onto biomaterials to protect them against harsh environments and processing, consequently improving cell viability in situ. Thus, we present here the fabrication of poly(lactic-co-glycolic acid) (PLGA) ultrathin ribbons with "canal-like" structures using a microfabrication technique to generate ribbons of aligned murine skeletal myoblasts (C2C12). We found that the ribbons functionalized with a solution of 3,4-dihydroxy-l-phenylalanine (DOPA) and then coated with poly-l-lysine (PLL) and fibronectin (FN) improve cell attachment and support the growth of C2C12. The viability of cells on the ribbons is evaluated following the syringe-handling steps of injection with different needle sizes. C2C12 cells readily adhere to the ribbon surface, proliferate over time, align (over 74%), maintain high viability (over 80%), and differentiate to myotubes longer than 400 μm. DNA content quantification carried out before and after injection and myogenesis evaluation confirm that cell-loaded ribbons can safely retain cells with high functionality after injection and are suitable for minimally invasive cell transplantation.
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Affiliation(s)
- Sahar Salehi
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Serge Ostrovidov
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Majid Ebrahimi
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Ramin Banan Sadeghian
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Xiaobin Liang
- School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8550, Japan
| | - Ken Nakajima
- School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8550, Japan
| | - Hojae Bae
- Department of Bioindustrial Technologies, College of Animal Bioscience and Technology, Konkuk University, Hwayang-dong, Kwangjin-gu, Seoul 143-701, Republic of Korea
| | - Toshinori Fujie
- Waseda Institute for Advanced Study, Waseda University, Shinjuku, Tokyo 162-8480, Japan.,PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
| | - Ali Khademhosseini
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.,Department of Bioindustrial Technologies, College of Animal Bioscience and Technology, Konkuk University, Hwayang-dong, Kwangjin-gu, Seoul 143-701, Republic of Korea.,Biomaterials Innovation Research Center, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02139, United States.,Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.,Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States.,Department of Physics, King Abdulaziz University, Jeddah 21569, Saudi Arabia
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10
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Preparation of complementary glycosylated hyperbranched polymer/poly(ethylene glycol) brushes and their selective interactions with hepatocytes. Colloids Surf B Biointerfaces 2016; 145:309-318. [DOI: 10.1016/j.colsurfb.2016.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 04/13/2016] [Accepted: 05/04/2016] [Indexed: 01/05/2023]
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11
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Erndt-Marino JD, Munoz-Pinto DJ, Samavedi S, Jimenez-Vergara AC, Diaz-Rodriguez P, Woodard L, Zhang D, Grunlan MA, Hahn MS. Evaluation of the Osteoinductive Capacity of Polydopamine-Coated Poly( ε-caprolactone) Diacrylate Shape Memory Foams. ACS Biomater Sci Eng 2015; 1:1220-1230. [PMID: 33304994 DOI: 10.1021/acsbiomaterials.5b00445] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recently, a novel shape memory polymer foam based on the photopolymerization of poly(ε-caprolactone) diacrylate (PCLDA) has been developed. These PCLDA foams enter a temporary softened state when briefly treated with warm saline (T saline > T m of PCLDA), allowing them to conform to irregular bone defect "boundaries" prior to shape setting. When coated with a mechanically stable polydopamine (PD) layer, these PCLDA foams have previously been demonstrated to induce hydroxyapatite deposition. In the present study, the osteoinductivity of these "self-fitting" PD-coated PCLDA (PD-PCLDA) materials was evaluated relative to uncoated PCLDA (U-PCLDA) controls using bone marrow-derived human mesenchymal stem cells (h-MSCs). When cultured in the absence of osteogenic media supplements, PD-PCLDA scaffolds expressed similar levels of Runx2, alkaline phosphatase, and osteopontin protein as U-PCLDA scaffolds cultured in the presence of osteogenic media supplements. In addition, PD-PCLDA scaffolds cultured without osteogenic supplements did not significantly promote undesired lineage progression (e.g., adipogenesis or chondrogenesis) of h-MSCs. Cumulatively, these data indicate that PD-PCLDA materials display increased osteoinductivity relative to U-PCLDA substrates. Future studies will examine tethered osteogenic factors or peptides toward augmenting the osteoinductive properties of the PD-PCLDA foams.
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Affiliation(s)
- Joshua D Erndt-Marino
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Dany J Munoz-Pinto
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Satyavrata Samavedi
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Andrea C Jimenez-Vergara
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Patricia Diaz-Rodriguez
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Lindsay Woodard
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Dawei Zhang
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas 77843, United States.,Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77843, United States
| | - Mariah S Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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12
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Kim S, Nam J, Yeo WS. A Method for Generation and Characterization of Orthogonal Three-Component Gradient Surfaces. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10481] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Sehee Kim
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center; Konkuk University; Seoul 143-701 Korea
| | - Jungchan Nam
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center; Konkuk University; Seoul 143-701 Korea
| | - Woon-Seok Yeo
- Department of Bioscience and Biotechnology, Bio/Molecular Informatics Center; Konkuk University; Seoul 143-701 Korea
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13
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Shen B, Xiong B, Wu H. Convenient surface functionalization of whole-Teflon chips with polydopamine coating. BIOMICROFLUIDICS 2015; 9:044111. [PMID: 26339312 PMCID: PMC4522012 DOI: 10.1063/1.4927675] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 07/21/2015] [Indexed: 06/05/2023]
Abstract
This paper presents a convenient strategy to modify the surface of whole-Teflon microfluidic chips by coating the channel walls with a thin layer of polydopamine (PDA) film, which is formed by oxidation-induced self-polymerization of dopamine in alkaline solution. Two coating strategies, static incubation and dynamic flow, are demonstrated and used for tuning the physical and chemical properties of the coated channel walls. The functionalized surfaces were investigated with the contact angle, X-ray photoelectron spectroscopy, and atomic force microscopy measurements. The coating time was optimized according to the fluorescent intensity of the green fluorescent protein immobilized on the modified surface. Applications of the PDA-modified Teflon microchips in bioanalysis were demonstrated with a typical sandwich immunoassay. Moreover, long-term cell culture experiments on modified and native Teflon chips revealed that the chip biocompatibility can be greatly improved with PDA coating. The results indicate that the surface properties of the Teflon can be easily controlled by the PDA modification, thus greatly expanding the application scope of whole-Teflon chips for various chemical and biological research fields.
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Affiliation(s)
- Bo Shen
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
| | - Bin Xiong
- Department of Chemistry, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong, China
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14
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Chang CW, Peng CC, Liao WH, Tung YC. Polydimethylsiloxane SlipChip for mammalian cell culture applications. Analyst 2015; 140:7355-65. [DOI: 10.1039/c5an00547g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A polydimethylsiloxane (PDMS) SlipChip for in vitro mammalian cell culture applications, including multiple-treatment assays, cell co-culture, and cytokine detection assays.
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Affiliation(s)
- Chia-Wen Chang
- Research Center for Applied Sciences
- Academia Sinica
- Taipei 11529
- Taiwan
| | - Chien-Chung Peng
- Research Center for Applied Sciences
- Academia Sinica
- Taipei 11529
- Taiwan
| | - Wei-Hao Liao
- Research Center for Applied Sciences
- Academia Sinica
- Taipei 11529
- Taiwan
| | - Yi-Chung Tung
- Research Center for Applied Sciences
- Academia Sinica
- Taipei 11529
- Taiwan
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15
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Carrow JK, Gaharwar AK. Bioinspired Polymeric Nanocomposites for Regenerative Medicine. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400427] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- James K. Carrow
- Department of Biomedical Engineering; Texas A&M University; College Station TX 77843 USA
| | - Akhilesh K. Gaharwar
- Department of Biomedical Engineering; Texas A&M University; College Station TX 77843 USA
- Department of Materials Science and Engineering; Texas A&M University; College Station TX 77843 USA
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16
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García B, Saiz-Poseu J, Gras-Charles R, Hernando J, Alibés R, Novio F, Sedó J, Busqué F, Ruiz-Molina D. Mussel-inspired hydrophobic coatings for water-repellent textiles and oil removal. ACS APPLIED MATERIALS & INTERFACES 2014; 6:17616-17625. [PMID: 25272371 DOI: 10.1021/am503733d] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A series of catechol derivatives with a different number of linear alkyl chain substituents, and different length, have been shown to polymerize in the presence of aqueous ammonia and air, yielding hydrophobic coatings that present the ability to provide robust and efficient water repellency on weaved textiles, including hydrophilic cotton. The polymerization strategy presented exemplifies an alternative route to established melanin- and polydopamine-like functional coatings, affording designs in which all catechol (adhesive) moieties support specific functional side chains for maximization of the desired (hydrophobic) functionality. The coatings obtained proved effective in the transformation of polyester and cotton weaves, as well as filter paper, into reusable water-repellent, oil-absorbent materials capable of retaining roughly double their weight in model compounds (n-tetradecane and olive oil), as well as of separating water/oil mixtures by simple filtration.
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Affiliation(s)
- Beatríz García
- Fundació Privada Ascamm, Parc Tecnològic del Vallès , Avenida Universitat Autònoma 23, E-08290 Cerdanyola del Vallès, Spain
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17
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Wu P, Fu Y, Cai K. Regulation of the migration of endothelial cells by a gradient density of vascular endothelial growth factor. Colloids Surf B Biointerfaces 2014; 123:181-90. [PMID: 25262406 DOI: 10.1016/j.colsurfb.2014.09.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 09/03/2014] [Accepted: 09/05/2014] [Indexed: 10/24/2022]
Abstract
To investigate the effect of the surface gradient density of growth factor on the migration of endothelial cells (ECs), an approach to fabricate a gradient density of vascular endothelial growth factor (VEGF) onto silicon slides has been developed in this study. Our approach involves gradual injection of 3-glycidoxypropyltrimeth oxysilane (GPTMS) and then back filling with 3-triethoxysilylpropyl succinicanhydride (TESPSA) to produce a gradient density of carboxyl groups (-COOH) onto the silicon slides. The -COOH moieties were then activated for the immobilization of VEGF, which leading to a surface gradient density of VEGF. The successful formation of both carboxyl and VEGF gradient densities were confirmed by contact angle measurement, confocal laser scanning microscopy (CLSM) and X-ray photoelectron spectroscopy (XPS), respectively. The treated silicon slide displayed a gradient density of VEGF from 54 to 132 ng/cm2 with a slope of 7.8 ng/cm2/mm. ECs cultured on the surface gradient density of VEGF demonstrated preferential orientation and an enhanced directional migration behavior. Up to 72% of cells migrated towards the region with high surface density of VEGF. However, the gradient density of VEGF had no significant effect on the cell migration rate. The study provides an alternative to explore chemical-directing cells migration, which is essentially important for understanding cell migration/in-growth behavior for angiogenesis involved in implant technology.
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Affiliation(s)
- Pian Wu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, PR China
| | - Ya Fu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, PR China; College of Chemistry and Chemical Engineering, Chongqing University of Science & Technology, Chongqing 401331, PR China.
| | - Kaiyong Cai
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing 400044, PR China.
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18
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Shi X, Li L, Ostrovidov S, Shu Y, Khademhosseini A, Wu H. Stretchable and micropatterned membrane for osteogenic differentation of stem cells. ACS APPLIED MATERIALS & INTERFACES 2014; 6:11915-23. [PMID: 24977302 DOI: 10.1021/am5029236] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Stem cells have emerged as potentially useful cells for regenerative medicine applications. To fully harness this potential, it is important to develop in vitro cell culture platforms with spatially regulated mechanical, chemical, and biological cues to induce the differentiation of stem cells. In this study, a cell culture platform was constructed that used polydopamine (PDA)-coated parafilm. The modified parafilm supports cell attachment and proliferation. In addition, because of the superb plasticity and ductility of the parafilm, it can be easily micropatterned to regulate the spatial arrangements of cells, and can exert different mechanical tensions. Specifically, we constructed a PDA-coated parafilm with grooved micropatterns to induce the osteogenic differentiation of stem cells. Adipose-derived mesenchymal stem cells that were cultured on the PDA-coated parafilm exhibited significantly higher osteogenic commitment in response to mechanical and spatial cues compared to the ones without stretch. Our findings may open new opportunities for inducing osteogenesis of stem cells in vitro using the platform that combines mechanical and spatial cues.
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Affiliation(s)
- Xuetao Shi
- WPI-Advanced Institute for Materials Research, Tohoku University , Sendai 980-8578, Japan
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19
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Li L, Lv X, Ostrovidov S, Shi X, Zhang N, Liu J. Biomimetic microfluidic device for in vitro antihypertensive drug evaluation. Mol Pharm 2014; 11:2009-15. [PMID: 24673554 DOI: 10.1021/mp5000532] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Microfluidic devices have emerged as revolutionary, novel platforms for in vitro drug evaluation. In this work, we developed a facile method for evaluating antihypertensive drugs using a microfluidic chip. This microfluidic chip was generated using the elastic material poly(dimethylsiloxane) (PDMS) and a microchannel structure that simulated a blood vessel as fabricated on the chip. We then cultured human umbilical vein endothelial cells (HUVECs) inside the channel. Different pressures and shear stresses could be applied on the cells. The generated vessel mimics can be used for evaluating the safety and effects of antihypertensive drugs. Here, we used hydralazine hydrochloride as a model drug. The results indicated that hydralazine hydrochloride effectively decreased the pressure-induced dysfunction of endothelial cells. This work demonstrates that our microfluidic system provides a convenient and cost-effective platform for studying cellular responses to drugs under mechanical pressure.
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Affiliation(s)
- Lei Li
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences & Beijing Key Laboratory of Cryo-Biomedical Engineering , Beijing100190, China
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20
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Liu S, Chen L, Tan L, Cao F, Bai L, Wang Y. A high efficiency approach for a titanium surface antifouling modification: PEG-o-quinone linked with titanium via electron transfer process. J Mater Chem B 2014; 2:6758-6766. [DOI: 10.1039/c4tb01014k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The stability and long-term antifouling properties of the electro-assembly monolayers of PEG-o-quinone are better than that of the self-assembly monolayers of PEG-catechol.
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Affiliation(s)
- Songtao Liu
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei, People's Republic of China
| | - Lijuan Chen
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei, People's Republic of China
| | - Lin Tan
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei, People's Republic of China
| | - Fuhu Cao
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei, People's Republic of China
| | - Longchao Bai
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei, People's Republic of China
| | - Yanmei Wang
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei, People's Republic of China
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