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Meng J, Mao G, Zhu Z, Li Q, Lin X, Wang L, Li Y, Huang Y. Novel Environmentally Responsive Polyvinyl Polyamine Hydrogels Capable of Phase Transformation with Temperature for Applications in Reservoir Profile Control. Gels 2023; 9:950. [PMID: 38131936 PMCID: PMC10742972 DOI: 10.3390/gels9120950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/24/2023] [Accepted: 12/01/2023] [Indexed: 12/23/2023] Open
Abstract
Hydrogel has been widely used in reservoir regulation for enhancing oil recovery, however, this process can experience negative influences on the properties and effects of the hydrogels. Therefore, developing novel hydrogels with excellent environmental responsiveness would improve the formation adaptability of hydrogels. In this study, novel polyvinyl polyamine hydrogels were synthesized by a ring-opening addition reaction between polyvinyl polyamines and polyethylene glycol glycidyl ether. The results of atomic force microscopy and transmission electron microscopy showed that the polyvinyl polyamine gel had a porous and irregular bulk structure and was endowed with water storage. With the temperature rising from 30 °C to 60 °C, the transmittance of diethylenetriamine hydrogel decreased from 84.3% to 18.8%, indicating that a phase transition had occurred. After the polyvinyl polyamine hydrogel with low initial viscosity was injected into the formation in the liquid phase, the increase of the reservoir temperature caused it to turn into an elastomer, thereby migrating to the depth of the reservoir and achieving effective plugging. Polyvinyl polyamine hydrogel could improve the profile of heterogeneous layers significantly by forcing subsequent fluids into the low permeability zone in the form of elastomers in the medium temperature reservoirs of 40-60 °C. The novel environmentally responsive polyvinyl polyamine hydrogels, capable of phase transformation with temperature, exhibited superior performance in recovering residual oil, which was beneficial for applications in reservoir profile control and oilfield development.
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Affiliation(s)
- Jianxun Meng
- College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China;
- Research Institute of Oil Production Engineering, Daqing Oilfield Limited Company, Daqing 163453, China; (Q.L.); (X.L.); (L.W.); (Y.L.)
- Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation, Daqing 163453, China
| | - Guoliang Mao
- College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China;
| | - Zhixuan Zhu
- Research Institute of Oil Production Engineering, Daqing Oilfield Limited Company, Daqing 163453, China; (Q.L.); (X.L.); (L.W.); (Y.L.)
- Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation, Daqing 163453, China
| | - Qingsong Li
- Research Institute of Oil Production Engineering, Daqing Oilfield Limited Company, Daqing 163453, China; (Q.L.); (X.L.); (L.W.); (Y.L.)
- Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation, Daqing 163453, China
| | - Xuesong Lin
- Research Institute of Oil Production Engineering, Daqing Oilfield Limited Company, Daqing 163453, China; (Q.L.); (X.L.); (L.W.); (Y.L.)
- Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation, Daqing 163453, China
| | - Lichao Wang
- Research Institute of Oil Production Engineering, Daqing Oilfield Limited Company, Daqing 163453, China; (Q.L.); (X.L.); (L.W.); (Y.L.)
- Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation, Daqing 163453, China
| | - Yiran Li
- Research Institute of Oil Production Engineering, Daqing Oilfield Limited Company, Daqing 163453, China; (Q.L.); (X.L.); (L.W.); (Y.L.)
- Heilongjiang Provincial Key Laboratory of Oil and Gas Reservoir Stimulation, Daqing 163453, China
| | - Yue Huang
- No. 2 Production Plant, Daqing Oilfield Limited Company, Daqing 163461, China;
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2
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Yin S, Zhou J, Wang J, Xia B, Chen G. Preparation and performance of electrically conductive decellularized nerve matrix hydrogel conduits. J Biomater Appl 2023; 38:471-483. [PMID: 37670570 DOI: 10.1177/08853282231200963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
Peripheral nerve injury (PNI) is one of the major clinical treatment challenges following an impact on the body. When PNI manifests as nerve gaps, surgical connections and exogenous grafts are required. Recently, electrically conductive polymers (CPs) based nerve guidance conduits have yielded promising results for treating PNI. Polypyrrole (PPy) has become one of the most commonly used CPs in PNI repair due to its advantages of high conductivity and excellent biocompatibility. In this study, we combined different PPy concentrations with a chitosan (CS) temperature-sensitive hydrogel system containing decellularized nerve matrix (DNM) to construct the electrically conductive nerve conduits. We evaluated the physical and biological properties of four groups of nerve conduits. It was found that the PPy concentrations were proportional to the electrical conductivity of the nerve conduits. The mechanical properties of the nerve conduits increased with higher PPy concentrations but decreased when the PPy concentration was as high as 8%. Meanwhile, the co-blending of PPy and DNM gave the nerve conduit suitable degradation properties. Furthermore, in vitro cytotoxicity assay and live/dead assay demonstrated these conduits could support the adhesion and growth of cells. In summary, the electrically conductive nerve conduits with high conductivity, mechanical properties, biodegradation characteristics, and cytocompatibility had potential applications in the field of peripheral nerve regeneration.
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Affiliation(s)
- Shiyun Yin
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Jiangyi Zhou
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Jinsong Wang
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
| | - Bin Xia
- Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing, China
| | - Guobao Chen
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, China
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3
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Pan W, Gao C, Zhu C, Yang Y, Xu L. Kinematic Behavior of an Untethered, Small-Scale Hydrogel-Based Soft Robot in Response to Magneto-Thermal Stimuli. Biomimetics (Basel) 2023; 8:379. [PMID: 37622984 PMCID: PMC10452115 DOI: 10.3390/biomimetics8040379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 08/12/2023] [Accepted: 08/17/2023] [Indexed: 08/26/2023] Open
Abstract
Fruit fly larvae, which exist widely in nature, achieve peristaltic motion via the contraction and elongation of their bodies and the asymmetric friction generated by the front and rear parts of their bodies when they are in contact with the ground. Herein, we report the development of an untethered, magnetic, temperature-sensitive hydrogel-based soft robot that mimics the asymmetric micro-patterns of fruit-fly-larvae gastropods and utilizes cyclic deformation to achieve directional peristaltic locomotion. Due to Néel relaxation losses of nanomagnetic Fe3O4 particles, the hydrogel-based soft robot is capable of converting changes in external alternating magnetic stimuli into contracting and expanding deformation responses which can be remotely controlled via a high-frequency alternating magnetic field (AMF) to realize periodic actuation. Furthermore, the Fe3O4 particles included in the hydrogel-based soft robot cause it to follow a gradient magnetic field in confined liquid environments and can be coupled with AMFs for the targeted release of water-soluble drugs or targeted magnetic hyperthermia therapy (MHT). We believe that such a controlled motion can enable highly targeted drug delivery, as well as vascular disease detection and thrombus removal tasks, without the use of invasive procedures.
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Affiliation(s)
- Wenlong Pan
- Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China; (W.P.)
| | - Chongyi Gao
- Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China; (W.P.)
| | - Chen Zhu
- Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China; (W.P.)
| | - Yabing Yang
- Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China; (W.P.)
| | - Lin Xu
- Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, China; (W.P.)
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Lang P, Liu T, Huang S, Zhou Z, Zhang M, Lin Y, He Q, Yao Y, Liu Z, Zhang L. Degradable Temperature-Sensitive Hydrogel Loaded with Heparin Effectively Prevents Post-Operative Tissue Adhesions. ACS Biomater Sci Eng 2023. [PMID: 37179492 DOI: 10.1021/acsbiomaterials.3c00017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Tissue adhesions could occur following surgeries, and severe tissue adhesions can lead to serious complications. Medical hydrogels could be applied at surgical sites as a physical barrier to prevent tissue adhesion. For practical reasons, spreadable, degradable, and self-healable gels are highly demanded. To meet these requirements, we applied carboxymethyl chitosan (CMCS) to poloxamer-based hydrogels to generate low Poloxamer338 (P338) content gels displaying low viscosity at refrigerator temperature and improved mechanical strength at body temperature. Heparin, an effective adhesion inhibitor, was also added to construct P338/CMCS-heparin composite hydrogel (PCHgel). PCHgel presents as a flowable liquid below 20 °C and could rapidly transform into gel when spread on the surface of damaged tissue due to temperature change. The introduction of CMCS enabled hydrogels to form a stable self-healable barrier at injured positions and slowly release heparin during the wound healing period before being degraded after ∼14 days. Ultimately, PCHgel significantly reduced tissue adhesion in model rats and displayed higher efficiency than P338/CMCS gel without heparin. Its adhesion suppression mechanism was verified, and it also displayed good biosafety. Therefore, PCHgel showed good clinical transformation potential with high efficacy, good safety, and ease of use.
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Affiliation(s)
- Puxin Lang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610000, China
| | - Tiantian Liu
- College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610000, China
| | - Shiqi Huang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610000, China
| | - Zhaojie Zhou
- College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610000, China
| | - Mengxing Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610000, China
| | - Yunzhu Lin
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan 610000, China
- West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610000, P. R. China
| | - Qin He
- Med-X Center for Materials, Sichuan University, Chengdu, Sichuan 610000, China
- West China School of Pharmacy, Sichuan University, Chengdu, Sichuan 610000, P. R. China
| | - Yuqin Yao
- Med-X Center for Materials, Sichuan University, Chengdu, Sichuan 610000, China
| | - Zhenmi Liu
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan 610000, China
| | - Ling Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu, Sichuan 610000, China
- Med-X Center for Materials, Sichuan University, Chengdu, Sichuan 610000, China
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan 610000, China
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Yi YH, Chen G, Gong S, Han LZ, Gong TL, Wang YX, Xu WH, Jin X. Injectable Temperature-Sensitive Hydrogel Loaded with IL-36Ra for the Relief of Osteoarthritis. ACS Biomater Sci Eng 2023; 9:1672-1681. [PMID: 36796355 DOI: 10.1021/acsbiomaterials.2c01144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Osteoarthritis (OA) is an inflammatory disease accompanied by synovial joint inflammation, and IL-36 plays an important role in this process. Local application of IL-36 receptor antagonist (IL-36Ra) can effectively control the inflammatory response, thereby protecting cartilage and slowing down the development of OA. However, its application is limited by the fact that it is rapidly metabolized locally. We designed and prepared a temperature-sensitive poly(lactic-co-glycolic acid)-poly(ethylene glycol)-poly(lactic-co-glycolic acid) (PLGA-PEG-PLGA) hydrogel (IL-36Ra@Gel) system carrying IL-36Ra and evaluated its basic physicochemical characteristics. The drug release curve of IL-36Ra@Gel indicated that this system could slowly release the drug over a longer period. Furthermore, degradation experiments showed that it could be largely degraded from the body within 1 month. The biocompatibility-related results showed that it had no significant effect on cell proliferation compared to the control group. In addition, the expression of MMP-13 and ADAMTS-5 was lower in IL-36Ra@Gel-treated chondrocytes than in the control group, and the opposite results appeared in aggrecan and collagen X. After 8 weeks of treatment with IL-36Ra@Gel by joint cavity injection, HE and Safranin O/Fast green staining showed that the degree of cartilage tissue destruction in the IL-36Ra@Gel-treated group was less than those in other groups. Meanwhile, the joints of mice in the IL-36Ra@Gel group had the most intact cartilage surface, the smallest thickness of cartilage erosion, and the lowest OARSI and Mankins score among all groups. Consequently, the combination of IL-36Ra and PLGA-PLEG-PLGA temperature-sensitive hydrogels can greatly improve the therapeutic effect and prolong the drug duration time, thus effectively delaying the progression of degenerative changes in OA, providing a new feasible nonsurgical treatment for OA.
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Affiliation(s)
- Yi-Hu Yi
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Guo Chen
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Song Gong
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Li-Zhi Han
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Tian-Lun Gong
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yu-Xiang Wang
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Wei-Hua Xu
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Xin Jin
- Department of Orthopaedics, Union Hospital, Tongji, Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
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Zhang J, Huang Q, Du C, Peng R, Hua Y, Li Q, Hu A, Zhou J. Preparation and Anti-Mold Properties of Nano-ZnO/Poly( N-isopropylacrylamide) Composite Hydrogels. Molecules 2020; 25:E4135. [PMID: 32927655 DOI: 10.3390/molecules25184135] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 09/06/2020] [Accepted: 09/07/2020] [Indexed: 02/07/2023] Open
Abstract
The aim of this study was to overcome drawbacks of the inhomogeneous dispersion and facile agglomeration of nano-ZnO/poly(N-isopropylacrylamide) composite hydrogels (nano-ZnO/PNIPAm composite hydrogels) during synthesis and improve the anti-mold property of the nano-ZnO/PNIPAm composite hydrogels. Here, nano-ZnO/PNIPAm composite hydrogels were prepared by the radical polymerization method. Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), differential scanning calorimeter (DSC), and dynamic light scattering (DLS) were used to characterize the effects of different dispersants on the particle sizes, dispersions, and phase transition characteristics of the nano-ZnO/PNIPAm composite hydrogels. The anti-mold properties of nano-ZnO/PNIPAm composite hydrogels were studied. Results revealed that the nano-ZnO/PNIPAm composite hydrogel prepared by the addition of nano-ZnO dispersion liquid exhibited the smallest particle size, the most homogeneous dispersion, and the highest stability. The addition of the dispersant did not change the phase transition characteristics of nano-ZnO/PNIPAm, and the nano-ZnO/PNIPAm composite hydrogels (Pf) exhibited good anti-mold properties to the bamboo mold.
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7
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Tsai HC, Chou HY, Chuang SH, Lai JY, Chen YS, Wen YH, Yu LY, Lo CL. Preparation of Immunotherapy Liposomal-Loaded Thermal-Responsive Hydrogel Carrier in the Local Treatment of Breast Cancer. Polymers (Basel) 2019; 11:E1592. [PMID: 31569466 PMCID: PMC6835415 DOI: 10.3390/polym11101592] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 11/16/2022] Open
Abstract
To reduce the side effects of immune drugs and the sustainable release of immune drugs on local parts, we have designed an injectable thermal-sensitive hydrogel containing an imiquimod-loaded liposome system. In the extracellular environment of tumor tissues (pH 6.4), 50% of the drug was released from the carrier, which could be a result of the morphological changes of the liposomal microstructure in the acidic environment. According to the results in animals, the drug-containing liposomes combined with hydrogel can be effectively applied in breast cancer therapy to delay the growth of tumors as well as to dramatically reduce the death rate of mice.
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Affiliation(s)
- Hsieh-Chih Tsai
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
- Advanced Membrane Materials Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
| | - Hsiao-Ying Chou
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
| | - Shun-Hao Chuang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
| | - Juin-Yih Lai
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
- Advanced Membrane Materials Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
- R&D Center for Membrane Technology, Chung Yuan Christian University, Taoyuan 32023, Taiwan.
| | - Yi-Shu Chen
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 112, Taiwan.
| | - Yu-Han Wen
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 112, Taiwan.
| | - Lu-Yi Yu
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 112, Taiwan.
| | - Chun-Liang Lo
- Department of Biomedical Engineering, National Yang-Ming University, Taipei 112, Taiwan.
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Zhao D, Ma W, Wang R, Yang X, Li J, Qiu T, Xiao X. The Preparation of Green Fluorescence-Emissioned Carbon Dots/Poly(N-Isopropylacrylamide) Temperature-Sensitive Hydrogels and Research on Their Properties. Polymers (Basel) 2019; 11:E1171. [PMID: 31373306 PMCID: PMC6680904 DOI: 10.3390/polym11071171] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 06/14/2019] [Accepted: 06/17/2019] [Indexed: 01/02/2023] Open
Abstract
Fluorescence/temperature-sensitive hydrogels, thanks to their properties in fluorescence and temperature sensitivity, have shown a promising outlook in the fields of drug delivery, cell imaging, etc., and thus become the focus of present research. This paper reports the preparation of green-fluorescence/temperature-sensitive hydrogels through one-step radical polymerization with green fluorescence-emissioned carbon dots as fluorescence probes and N-isopropylacrylamide as a monomer. UV-vis spectra, fluorescence spectra, and fluorescence microscope imaging have been used to characterize the prepared hydrogel, and to study their optical and temperature-sensitive properties. It was discovered that the emission of prepared hydrogel is excitation wavelength-dependent, pH responding, and excellent temperature-sensitive, as well as having good biocompatibility. The prepared hydrogel can also be applied as fluorescence ink in the fields of anti-counterfeit identification and appraisal.
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Affiliation(s)
- Dan Zhao
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
- National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Wenting Ma
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
- National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Rong Wang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
| | - Xinzhou Yang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
- National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Jun Li
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China
- National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Ting Qiu
- Information Center, Shanghai Institude of Organic Chemistry, Shanghai 200032, China
| | - Xincai Xiao
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430074, China.
- National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan 430074, China.
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Kim EM, Lee YB, Byun H, Chang HK, Park J, Shin H. Fabrication of Spheroids with Uniform Size by Self-Assembly of a Micro-Scaled Cell Sheet (μCS): The Effect of Cell Contraction on Spheroid Formation. ACS Appl Mater Interfaces 2019; 11:2802-2813. [PMID: 30586277 DOI: 10.1021/acsami.8b18048] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cell spheroid culture can be an effective approach for providing an engineered microenvironment similar to an in vivo environment. Our group had recently developed a method for harvesting uniformly sized multicellular spheroids via self-assembly of micro-scaled cell sheets (μCSs) induced by the expansion of temperature-sensitive hydrogels. However, the μCS assembly process was not fully understood. In this study, we investigated the effects of cell number, pattern shape, and contractile force of cells on spheroid formation from micropatterned (width of square pattern from 100-300 μm) hydrogels. We used human dermal fibroblasts (HDFBs) as a model cell type and cultured them for 24 and 72 h. The self-assembly of μCSs cultured on square micropatterns for 72 h rapidly occurred within 4 min after reducing the temperature from 37 to 4 °C. In addition, the size distribution of spheroids was narrower with μCSs from a 72 h culture. Treatment with a ROCK1 inhibitor disrupted cytoskeletal actin fibers and the corresponding μCSs were not detached from the hydrogel. The assembly of the μCS was also affected by the micropattern shape, and the spheroid harvest efficiency was decreased to 60% when using a circular micropattern, which was explained by the stress direction on the circular versus square micropattern upon hydrogel expansion. Therefore, we confirmed that the factors controlling cell-cell interactions are important for spheroid formation using micropatterned hydrogel systems. Finally, the μCSs with dual layers of HDFBs labeled with DiD and DiO dyes resulted in the formation of spheroids with discretely localized colors within the core and shell, respectively, which suggests an outside-in assembly of detached μCSs. In consideration of these complex environmental factors, our system could be utilized in various applications as a three-dimensional culture system to fabricate cell spheroids.
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Affiliation(s)
| | | | | | - Hyung-Kwan Chang
- Department of Mechanical Engineering , Sogang University , 35 Baekbeom-ro , Mapo-gu, Seoul 04107 , Republic of Korea
| | - Jungyul Park
- Department of Mechanical Engineering , Sogang University , 35 Baekbeom-ro , Mapo-gu, Seoul 04107 , Republic of Korea
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Zhang N, Zheng S, Pan Z, Liu Z. Phase Transition Effects on Mechanical Properties of NIPA Hydrogel. Polymers (Basel) 2018; 10:E358. [PMID: 30966393 PMCID: PMC6414852 DOI: 10.3390/polym10040358] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 03/08/2018] [Accepted: 03/20/2018] [Indexed: 11/16/2022] Open
Abstract
Due to its excellent temperature sensitivity, the Poly(N-isopropylacrylamide) (NIPA) hydrogel has attracted great interest for a wide variety of applications in tissue engineering and regenerative medicine. NIPA hydrogel undergoes an abrupt volume phase transition at a lower critical solution temperature (LCST) of 30⁻35 °C. However, the mechanical behaviors of NIPA hydrogel induced by phase transition are still not well understood. In this study, phase transition effects on mechanical properties of NIPA hydrogel are quantitatively studied from experimental studies. The mechanical properties of NIPA hydrogel with the LSCT around 35 °C are systemically studied with varying temperatures (31⁻39 °C) under a tensile test. We find that the mechanical properties of NIPA hydrogel are greatly influenced by phase transition during the tension process. The maximum nominal stress and maximum stretch above the LCST are larger than those of below the LCST. The Young's modulus of NIPA hydrogel is around 13 kPa at 31 °C and approximately 28 kPa at 39 °C. A dramatic increase of Young's modulus values is observed as the temperature increases through the phase transition. The samples at a temperature around the LCST are easy to rupture, because of phase coexistent. Additionally, NIPA hydrogel displays toughening behavior under a cyclic load. Furthermore, the toughening characteristic is different between the swollen state and the collapsed state. This might originate from the internal fracture process and redistribution of polymer chains during the tension process.
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Affiliation(s)
- Ni Zhang
- International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structure, Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Shoujing Zheng
- International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structure, Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Zhouzhou Pan
- International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structure, Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Zishun Liu
- International Center for Applied Mechanics, State Key Laboratory for Strength and Vibration of Mechanical Structure, Shaanxi Engineering Research Center of Nondestructive Testing and Structural Integrity Evaluation, Xi'an Jiaotong University, Xi'an 710049, China.
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11
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Xu HL, Xu J, Zhang SS, Zhu QY, Jin BH, ZhuGe DL, Shen BX, Wu XQ, Xiao J, Zhao YZ. Temperature-sensitive heparin-modified poloxamer hydrogel with affinity to KGF facilitate the morphologic and functional recovery of the injured rat uterus. Drug Deliv 2017; 24:867-881. [PMID: 28574291 PMCID: PMC8241134 DOI: 10.1080/10717544.2017.1333173] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Endometrial injury usually results in intrauterine adhesion (IUA), which is an important cause of infertility and recurrent miscarriage in reproductive women. There is still lack of an effective therapeutic strategy to prevent occurrence of IUA. Keratinocyte growth factor (KGF) is a potent repair factor for epithelial tissues. Here, a temperature-sensitive heparin-modified poloxamer (HP) hydrogel with affinity to KGF (KGF-HP) was used as a support matrix to prevent IUA and deliver KGF. The rheology of KGF-HP hydrogel was carefully characterized. The cold KGF-HP solution was rapidly transited to hydrogel with suitable storage modulus (G′) and loss modulus (G″) for the applications of uterus cavity at temperature of 33 °C. In vitro release demonstrated that KGF was released from HP hydrogels in sustained release manner for a long time. In vivo bioluminescence imaging showed that KGF-HP hydrogel was able to prolong the retention of the encapsulated KGF in injured uterus of rat model. Moreover, the morphology and function of the injured uterus were significantly recovered after administration of KGF-HP hydrogel, which were evaluated by two-dimensional ultrasound imaging and receptive fertility. Not only proliferation of endometrial glandular epithelial cells and luminal epithelial cells but also angiogenesis of injured uterus were observed by Ki67 and CD31 staining after 7 d of treatment with KGF-HP hydrogel. Finally, a close relatively relationship between autophagy and proliferation of endometrial epithelial cells (EEC) and angiogenesis was firstly confirmed by detecting expression of LC3-II and P62 after KGF treatment. Overall, KGF-HP may be used as a promising candidate for IUA treatment.
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Affiliation(s)
- He-Lin Xu
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
| | - Jie Xu
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
| | - Si-Si Zhang
- b First Affiliated Hospital, Wenzhou Medical University , Wenzhou City , PR China
| | - Qun-Yan Zhu
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
| | - Bing-Hui Jin
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
| | - De-Li ZhuGe
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
| | - Bi-Xin Shen
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
| | - Xue-Qing Wu
- b First Affiliated Hospital, Wenzhou Medical University , Wenzhou City , PR China
| | - Jian Xiao
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
| | - Ying-Zheng Zhao
- a Department of Pharmaceutics, School of Pharmaceutical Sciences , Wenzhou Medical University , Wenzhou City , PR China
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