1
|
Shimazaki Y, Inoue A, Ikeuchi H. Electrophoretic injection and reaction of dye-bound enzymes to protein and bacteria within gel. J Microbiol Methods 2020; 176:106028. [PMID: 32795638 DOI: 10.1016/j.mimet.2020.106028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 08/02/2020] [Accepted: 08/05/2020] [Indexed: 11/26/2022]
Abstract
Three-dimensional (3D) cell cultures within gels are used to examine physiological reactions between cells, including bacteria and macromolecules such as enzymes. Using non-denaturing electrophoresis, an anionic Coomassie Brilliant Blue (CBB) dye successfully bound to enzymes such as trypsin and lysozyme, and reacted with a protein and a bacterium within a gel. Both CBB-bound trypsin and lysozyme retained their enzymatic activities and migrated toward the anode in non-denaturing electrophoresis. CBB-bound trypsin successfully digested the iron-binding protein, transferrin, within the gel. Furthermore, the activity of esterase extracted from the bacteria, Bacillus subtilis was analyzed by the non-denaturing electrophoresis containing both the bacteria and the CBB-bound lysozyme after the bacteriolysis of the bacteria by the addition of CBB-bound lysozyme. This method can be applied to deliver enzymes to organisms including bacteria within 3D cell cultures.
Collapse
Affiliation(s)
- Youji Shimazaki
- Department of Chemistry and Biology, Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan; Faculty of Science, Ehime University, Matsuyama, Japan.
| | - Aoshi Inoue
- Faculty of Science, Ehime University, Matsuyama, Japan
| | | |
Collapse
|
2
|
Zhu W, Jiang L, Wang B, Gu S, Hu F, Wang C, Chen Y. Rational Design of PMPC/PDMC/PEGDA Hydrogel Micropatterns onto Polylactic Acid with Enhanced Biological Activity. ACS Biomater Sci Eng 2020; 6:3799-3810. [PMID: 33463331 DOI: 10.1021/acsbiomaterials.0c00270] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Polylactic acid (PLA) is one of the biodegradable materials that has been used in the areas of surgical healing lines, cancer treatment, and wound healing. However, the application of PLA is still rather limited due to its high hydrophobicity and poor antibacterial activity. In order to enhance the antifouling and antibacterial performances of PLA, here we modified the surface of PLA with various sizes of hydrogel micropatterns in negative or positive mode using plasma treatment, the photomask technique, and UV-graft polymerization. The hydrogel micropatterns consist of poly(ethylene glycol) diacrylate (PEGDA), poly(2-methacryloyloxyethylphosphorylcholine) (PMPC), and poly(methacryloyloxyethyltrimethylammonium chloride) (PDMC). Compared to PLA, the patterned PLA (PLA-PMPC/PDMC/PEGDA) shows obviously enhanced antifouling and antibacterial activities. For PLA-PMPC/PDMC/PEGDA with either positive or negative micropatterns, the antifouling and antibacterial properties are gradually increasing with decreasing the size of micropatterns. Compared with PLA-PMPC/PDMC/PEGDA bearing positive and negative micropatterns in the same size, the PLA-PMPC/PDMC/PEGDA with negative micropatterns exhibits slightly better biological activity and the PLA-PMPC/PDMC/PEGDA with 3 μm negative hydrogel micropatterns shows the best hydrophilicity, antifouling, and antibacterial properties. Combining the in vitro hemolysis assay, cytotoxicity, water absorption test, and degradation test results, it is suggested that the fabrication of hydrogel micropatterns onto the PLA surface could significantly improve biological activities of PLA. We expect that this work would provide a new strategy to potentially develop PLA as a promising wound dressing.
Collapse
Affiliation(s)
- Wancheng Zhu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Liu Jiang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Bulei Wang
- Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, Ministry of Education, National Engineering Laboratory for Resource Developing of Endangered Chinese Crude Drugs in Northwest of China, College of Life Sciences, Shaanxi Normal University, Xi'an 710119, China
| | - Shunli Gu
- Department of Transfusion Medicine, Xijing Hospital, The Air Force Military Medical University, Xi'an 710032, China
| | - Fenyan Hu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Changhao Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Yashao Chen
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| |
Collapse
|
3
|
Yu J, Sun G, Lin NW, Vadanan SV, Lim S, Chen CH. Intelligent optofluidic analysis for ultrafast single bacterium profiling of cellulose production and morphology. LAB ON A CHIP 2020; 20:626-633. [PMID: 31919490 DOI: 10.1039/c9lc01105f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Bacterial cellulose (BC), a renewable type of cellulose, has been used in the manufacture of foods, cosmetics, and biomedical products. To produce BC, a high-throughput single-bacterium measurement is necessary to identify the functional bacteria that can produce BC with sufficient amount and desirable morphology. In this study, a continuous-flow intelligent optofluidic device was developed to enable high-throughput single-bacterium profiling of BC. Single bacteria were incubated in agarose hydrogel particles to produce BC with varied densities and structures. An intelligent convolutional neural network (CNN) computational method was developed to analyze the scattering patterns of BC. The BC production and morphology were determined with a throughput of ∼35 bacteria per second. A total of ∼105 single-bacterium BC samples were characterized within 3 hours. The high flexibility of this approach facilitates high-throughput comprehensive single-cell production analysis for a range of applications in engineering biology.
Collapse
Affiliation(s)
- Jiaqing Yu
- Department of Biomedical Engineering, National University of Singapore, 117575 Singapore
| | - Guoyun Sun
- Department of Biomedical Engineering, National University of Singapore, 117575 Singapore
| | - Nicholas Weikang Lin
- Department of Biomedical Engineering, National University of Singapore, 117575 Singapore
| | | | - Sierin Lim
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637457 Singapore
| | - Chia-Hung Chen
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong.
| |
Collapse
|
4
|
|
5
|
Li P, Dou X, Schönherr H. Micropatterning and nanopatterning with polymeric materials for advanced biointerface‐controlled systems. POLYM INT 2019. [DOI: 10.1002/pi.5770] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ping Li
- Department of Chemistry and Biology, Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cµ)University of Siegen Siegen Germany
| | - Xiaoqiu Dou
- Department of Chemistry and Biology, Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cµ)University of Siegen Siegen Germany
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and EngineeringShanghai Jiaotong University Shanghai China
| | - Holger Schönherr
- Department of Chemistry and Biology, Physical Chemistry I and Research Center of Micro and Nanochemistry and Engineering (Cµ)University of Siegen Siegen Germany
| |
Collapse
|
6
|
Agarose-based microwell array chip for high-throughput screening of functional microorganisms. Talanta 2019; 191:342-349. [DOI: 10.1016/j.talanta.2018.08.090] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/27/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022]
|
7
|
van der Vlies AJ, Barua N, Nieves-Otero PA, Platt TG, Hansen RR. On Demand Release and Retrieval of Bacteria from Microwell Arrays Using Photodegradable Hydrogel Membranes. ACS APPLIED BIO MATERIALS 2018; 2:266-276. [DOI: 10.1021/acsabm.8b00592] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- André J. van der Vlies
- Chemical Engineering Department, Kansas State University, 1701A Platt Street, Manhattan, Kansas 66506, United States
| | - Niloy Barua
- Chemical Engineering Department, Kansas State University, 1701A Platt Street, Manhattan, Kansas 66506, United States
| | - Priscila A. Nieves-Otero
- Division of Biology, Kansas State University, 1717 Claflin Road, Manhattan, Kansas 66506, United States
| | - Thomas G. Platt
- Division of Biology, Kansas State University, 1717 Claflin Road, Manhattan, Kansas 66506, United States
| | - Ryan R. Hansen
- Chemical Engineering Department, Kansas State University, 1701A Platt Street, Manhattan, Kansas 66506, United States
| |
Collapse
|
8
|
Hori K, Sano M, Suzuki M, Hanabusa K. Preparation of porous polymer materials using water-in-oil gel emulsions as templates. POLYM INT 2018. [DOI: 10.1002/pi.5579] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Koichi Hori
- Faculty of Textile Science and Technology; Shinshu University; Ueda Japan
| | - Mayu Sano
- Faculty of Textile Science and Technology; Shinshu University; Ueda Japan
| | - Masahiro Suzuki
- Interdisciplinary Graduate School of Science and Technology; Shinshu University; Ueda Japan
| | - Kenji Hanabusa
- Interdisciplinary Graduate School of Science and Technology; Shinshu University; Ueda Japan
- Institute for Fiber Engineering, ICCER; Shinshu University; Ueda Japan
| |
Collapse
|
9
|
Suga S, Suzuki M, Hanabusa K. Development of New D,L-Methionine-based Gelators. J Oleo Sci 2018; 67:539-549. [PMID: 29710040 DOI: 10.5650/jos.ess17248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
D,L-Methionine was chosen as a starting material for the preparation of a new gelator N-10-undecenoyl-D,L-methionylaminooctadecane (DL-Met-R18). Three oligo (dimethylsiloxane)-containing gelators, DL-Met-R18/Si3, DL-Met-R18/Si7-8, and DL-Met-R18/Si14-15, were also prepared from DL-Met-R18 by hydrosilylation reactions. Their gelation abilities were evaluated on the basis of the minimum gel concentration using nine solvents. Compound DL-Met-R18 was able to gelate liquid paraffin and silicone oil, but it crystallized in most solvents. However, DL-Met-R18/Si7-8 resulted to be the best gelator, gelling eight solvents at low concentrations. The results of gelation tests demonstrated that the ability to form stable gels decreases in the following order: DL-Met-R18/Si7-8 ≈ DL-Met-R18/Si14-15 > DL-Met-R18/Si3 >> DL-Met-R18. The aspects and thermal stabilities of the gels were investigated using three-component mixtures of solvents composed of hexadecyl 2-ethylhexanoate, liquid paraffin, and decamethylcyclopentasiloxane (66 combinations). DL-Met-R18/Si3, DL-Met-R18/Si7-8, and DL-Met-R18/Si14-15 could form gels with all these mixed solvent combinations; particularly, DL-Met-R18/Si7-8 gave rise to transparent or translucent gels. FT-IR spectra suggested that the formation of hydrogen bonds between the NH and C=O groups of the amides is one of driving forces involved in the gelation process. Aggregates comprising three-dimensional networks were studied by transmission electron microscopy. Moreover, the viscoelastic behavior of the gels was investigated by rheology measurements.
Collapse
Affiliation(s)
- Shunichi Suga
- Faculty of Textile Science & Technology, Shinshu University
| | - Masahiro Suzuki
- Interdisciplinary Graduate School of Science & Technology, Shinshu University
| | - Kenji Hanabusa
- Interdisciplinary Graduate School of Science & Technology, Shinshu University.,Division of Frontier Fibers, Institute for Fiber Engineering, ICCER, Shinshu University
| |
Collapse
|