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Geng B, Zeng H, Luo H, Wu X. Construction of Wearable Touch Sensors by Mimicking the Properties of Materials and Structures in Nature. Biomimetics (Basel) 2023; 8:372. [PMID: 37622977 PMCID: PMC10452172 DOI: 10.3390/biomimetics8040372] [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: 07/25/2023] [Revised: 08/14/2023] [Accepted: 08/15/2023] [Indexed: 08/26/2023] Open
Abstract
Wearable touch sensors, which can convert force or pressure signals into quantitative electronic signals, have emerged as essential smart sensing devices and play an important role in various cutting-edge fields, including wearable health monitoring, soft robots, electronic skin, artificial prosthetics, AR/VR, and the Internet of Things. Flexible touch sensors have made significant advancements, while the construction of novel touch sensors by mimicking the unique properties of biological materials and biogenetic structures always remains a hot research topic and significant technological pathway. This review provides a comprehensive summary of the research status of wearable touch sensors constructed by imitating the material and structural characteristics in nature and summarizes the scientific challenges and development tendencies of this aspect. First, the research status for constructing flexible touch sensors based on biomimetic materials is summarized, including hydrogel materials, self-healing materials, and other bio-inspired or biomimetic materials with extraordinary properties. Then, the design and fabrication of flexible touch sensors based on bionic structures for performance enhancement are fully discussed. These bionic structures include special structures in plants, special structures in insects/animals, and special structures in the human body. Moreover, a summary of the current issues and future prospects for developing wearable sensors based on bio-inspired materials and structures is discussed.
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Affiliation(s)
| | | | - Hua Luo
- School of Mechanical Engineering, Sichuan University, Chengdu 610065, China
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2
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Yang YJ, Gao ZF. Bio-inspired Superwettable Surface for the Detection of Cancer Biomarker: A Mini Review. Technol Cancer Res Treat 2022; 21:15330338221110670. [PMID: 35790461 PMCID: PMC9340408 DOI: 10.1177/15330338221110670] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Inspired by nature, superwettable material-based biosensors have aroused wide interests due to their potential in cancer biomarker detection. This mini review mainly summarized the superwettable materials as novel biosensing substrates for the development of evaporation-induced enrichment-based signal amplification and visual biosensing method. Biosensing applications based on the superhydrophobic surfaces, superwettable micropatterned surfaces, and slippery lubricant-infused porous surfaces for various cancer biomarker detections were described in detail. Finally, an insight of remaining challenges and perspectives of superwettable biosensor is proposed.
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Affiliation(s)
- Yun Jun Yang
- Advanced Research Institute for Multidisciplinary Science, 12689Qilu University of Technology (Shandong Academy of Sciences), Jinan, People's Republic of China
| | - Zhong Feng Gao
- Advanced Materials Institute, 12689Qilu University of Technology (Shandong Academy of Sciences), Jinan, People's Republic of China.,Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong, Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers, College of Chemistry and Chemical Engineering, 165082Linyi University, Linyi, People's Republic of China
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3
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Ran J, Su X, Zhang J, Zhang J, Chen J, Liu K, Liu Z, Hu Y, Sun L, Jiang D. Continuous, Large-Scale, and High Proportion of Bioinspired Phosphogypsum Composites via Reactive Extrusion. Materials (Basel) 2021; 14:ma14195601. [PMID: 34639998 PMCID: PMC8509489 DOI: 10.3390/ma14195601] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/16/2021] [Accepted: 09/22/2021] [Indexed: 11/16/2022]
Abstract
Biological matter evolution provides an idea for the human design and synthesis of new materials. However, biomimetic materials only stay in laboratory-scale models, and their large-scale industrial applications are yet to be realized. Here, inspired by nacre's architecture, we report a continuous, large-scale method to fabricate phosphogypsum composites by reactive extrusion strategy. After curing for seven days, with more than 50 wt% of beta-hemihydrate phosphogypsum (β-HPG), the compressive strength and softening coefficient were 24.98 MPa and 0.78, increasing by 110.0% and 20.0%, respectively, compared to the pouring method. The results show that the screw extrusion process can improve the mechanical strength and waterproof properties of β-HPG hydration specimens without any special chemical admixtures and cements.
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Affiliation(s)
- Jingyu Ran
- Guizhou Phosphogypsum Institute, Guizhou Institute of Technology, Guiyang 550003, China; (J.Z.); (J.C.); (K.L.)
- Correspondence: (J.R.); (X.S.)
| | - Xiangdong Su
- Key Laboratory of Light Metal Materials Processing of Guizhou Province, Guizhou Institute of Technology, Guiyang 550003, China;
- Correspondence: (J.R.); (X.S.)
| | - Jiangang Zhang
- Key Laboratory of Light Metal Materials Processing of Guizhou Province, Guizhou Institute of Technology, Guiyang 550003, China;
| | - Jie Zhang
- Guizhou Phosphogypsum Institute, Guizhou Institute of Technology, Guiyang 550003, China; (J.Z.); (J.C.); (K.L.)
| | - Jiajun Chen
- Guizhou Phosphogypsum Institute, Guizhou Institute of Technology, Guiyang 550003, China; (J.Z.); (J.C.); (K.L.)
| | - Kun Liu
- Guizhou Phosphogypsum Institute, Guizhou Institute of Technology, Guiyang 550003, China; (J.Z.); (J.C.); (K.L.)
| | - Zhao Liu
- Guizhou Haobainian Housing Industry Co., Ltd., Guiyang 550000, China;
| | - Yi Hu
- Bijie Yuyuan New Materials Co., Ltd., Bijie 551700, China;
| | - Liqun Sun
- Guizhou Building Material Quality Supervision Testing Center, Guiyang 550014, China; (L.S.); (D.J.)
| | - Deyong Jiang
- Guizhou Building Material Quality Supervision Testing Center, Guiyang 550014, China; (L.S.); (D.J.)
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Lee N, Berthelson PR, Nguyen V, Garrett M, Brinda AK, Moser RD, Horstemeyer MF, Rhee H, Prabhu RK. Microstructure and nanomechanical properties of the exoskeleton of an ironclad beetle ( Zopherus haldemani). Bioinspir Biomim 2021; 16:036005. [PMID: 33530070 DOI: 10.1088/1748-3190/abe27b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
This study examined natural composite structures within the remarkably strong exoskeleton of the southwestern ironclad beetle (Z. haldemani). Structural and nanomechanical analyses revealed that the exoskeleton's extraordinary resistance to external forces is provided by its exceptional thickness and multi-layered structure, in which each layer performed a distinct function. In detail, the epicuticle, the outmost layer, comprised 3%-5% of the overall thickness with reduced Young's moduli of 2.2-3.2 GPa, in which polygonal-shaped walls (2-3μm in diameter) were observed on the surface. The next layer, the exocuticle, consisted of 17%-20% of the total thickness and exhibited the greatest Young's moduli (∼15 GPa) and hardness (∼800 MPa) values. As such, this layer provided the bulk of the mechanical strength for the exoskeleton. While the endocuticle spanned 70%-75% of the total thickness, it contained lower moduli (∼8-10 GPa) and hardness (∼400 MPa) values than the exocuticle. Instead, this layer may provide flexibility through its specifically organized chitin fiber layers, known as Bouligand structures. Nanoindentation testing further reiterated that the various fibrous layer orientations resulted in different elastic moduli throughout the endocuticle's cross-section. Additionally, this exoskeleton prevented delamination within the composite materials by overlapping approximately 5%-19% of each fibrous stack with neighboring layers. Finally, the innermost layer, the epidermis contributing 5%-7 % of the total thickness, contains attachment sites for muscle and soft tissue that connect the exoskeleton to the beetle. As such, it is the softest region with reduced Young's modulus of ∼2-3 GPa and hardness values of ∼290 MPa. These findings can be applied to the development of innovative, fiber-reinforced composite materials.
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Affiliation(s)
- Nayeon Lee
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, United States of America
| | - Parker R Berthelson
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, United States of America
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS 39762, United States of America
| | - Vina Nguyen
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, United States of America
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS 39762, United States of America
| | - Me'Lanae Garrett
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, United States of America
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS 39762, United States of America
| | - AnneMarie K Brinda
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, United States of America
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS 39762, United States of America
| | - Robert D Moser
- US Army Engineer Research and Development Center, Vicksburg, MS 39180, United States of America
| | - M F Horstemeyer
- School of Engineering, Liberty University, Lynchburg, VA 24515, United States of America
| | - Hongjoo Rhee
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, United States of America
- Department of Mechanical Engineering, Mississippi State University, Mississippi State, MS 39762, United States of America
| | - R K Prabhu
- Center for Advanced Vehicular Systems, Mississippi State University, Starkville, MS 39759, United States of America
- Department of Agricultural and Biological Engineering, Mississippi State University, Mississippi State, MS 39762, United States of America
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Lee K, Tiu BDB, Martchenko V, Mai K, Lee G, Gerst M, Messersmith PB. A Modular Strategy for Functional Pressure Sensitive Adhesives. ACS Appl Mater Interfaces 2021; 13:3161-3165. [PMID: 33401911 DOI: 10.1021/acsami.0c19405] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A modular approach to synthesizing functional pressure sensitive adhesives (PSAs) was introduced, wherein a modifiable acrylic PSA copolymer was synthesized by copolymerizing common PSA monomers with 6 mol % glycidyl methacrylate, allowing for subsequent functional group modification via the pendant epoxide functionality. This postmodification technique has the advantage of allowing the installation of a variety of functional groups relevant to adhesion, without variation of molecular weight. Because comparisons of cohesive and adhesive performance of candidate PSAs can be complicated by molecular weight differences, this strategy simplifies direct comparisons of the effects of functional groups on performance. As a proof of concept, a mussel-inspired catecholic PSA was synthesized by postreaction of the epoxide scaffold polymer with a thiol-modified catechol, allowing the effect of catechol on underlying structure-property relationships to be determined without variation in molecular weight. The mechanical performance of catecholic PSA was compared to relevant control PSAs by using industry-standard 180° peel and static shear tests, revealing an increase in peel strength achieved through catechol modification. Moreover, we observed an unexpected enhancement in PSA cohesive strength attributed to oxidation of catechol, which cannot be attributed to differences in molecular weight, a common source of changes in PSA cohesive strength.
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Affiliation(s)
- Kyueui Lee
- Department of Bioengineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Brylee David B Tiu
- Department of Bioengineering, University of California at Berkeley, Berkeley, California 94720, United States
| | - Valentin Martchenko
- Department of Chemical Biology, University of California at Berkeley, Berkeley, California 94720, United States
| | - Kristene Mai
- Department of Chemical Biology, University of California at Berkeley, Berkeley, California 94720, United States
| | - Goun Lee
- Department of Molecular and Cellular Biology, University of California at Berkeley, Berkeley, California 94720, United States
| | - Matthias Gerst
- Polymers for Adhesives, BASF SE, D-67056 Ludwigshafen, Germany
| | - Phillip B Messersmith
- Department of Bioengineering, University of California at Berkeley, Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California at Berkeley, Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Rossi M, Marrazzo P. The Potential of Honeybee Products for Biomaterial Applications. Biomimetics (Basel) 2021; 6:biomimetics6010006. [PMID: 33467429 PMCID: PMC7838782 DOI: 10.3390/biomimetics6010006] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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] [Received: 11/30/2020] [Revised: 01/10/2021] [Accepted: 01/11/2021] [Indexed: 02/06/2023] Open
Abstract
The development of biomaterials required continuous improvements in their properties for new tissue engineering applications. Implants based on biocompatible materials and biomaterial-based dressings are susceptible to infection threat; moreover, target tissues can suffer injuring inflammation. The inclusion of nature-derived bioactive compounds usually offers a suitable strategy to expand or increase the functional properties of biomaterial scaffolds and can even promote tissue healing. Honey is traditionally known for its healing property and is a mixture of phytochemicals that have a proven reputation as antimicrobial, anti-inflammatory, and antioxidant agents. This review discusses on the potential of honey and other honeybee products for biomaterial improvements. Our study illustrates the available and most recent literature reporting the use of these natural products combined with different polymeric scaffolds, to provide original insights in wound healing and other tissue regenerative approaches.
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Affiliation(s)
- Martina Rossi
- Department of Pharmacy and Biotechnology, University of Bologna, 40127 Bologna, Italy;
| | - Pasquale Marrazzo
- Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, 40126 Bologna, Italy
- Correspondence:
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Wang Y, Xia S, Xiao G, Di J, Wang J. High-Loading Boron Nitride-Based Bio-Inspired Paper with Plastic-like Ductility and Metal-like Thermal Conductivity. ACS Appl Mater Interfaces 2020; 12:13156-13164. [PMID: 32083457 DOI: 10.1021/acsami.9b21753] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Although desirable in next-generation flexible electronics, fabricating hybrid film materials with excellent integration of mechanical and thermally conductive yet electrically insulating properties is still a challenge. In mollusk nacre, a small volume of the chitin nanofiber framework hosts 95 vol % CaCO3 microplatelets, enabling the high-loading natural composites to exhibit a ductile deformation behavior. Inspired by this, we fabricate a large-area, boron nitride-based bio-inspired paper using a facile sol-gel-film conversion approach, in which BN microplatelets with a loading of 40-80 wt % are embedded into a 3D poly(p-phenylene benzobisoxazole) nanofiber framework. Because of the vital role of the 3D nanofiber framework, the BN-based paper exhibits plastic-like ductility (38-80%), ultrahigh toughness (10-100 MJ m-3), and good folding endurance. The high-loading BN platelets form an oriented, percolative network and endow the paper with outstanding in-plane thermal conductivity (77.1-214.2 W m-1 K-1) comparable to that of some metals, such as aluminum alloys (108-230 W m-1 K-1). Using the electrically insulating BN-based paper as a flexible substrate, we demonstrate its promising application for lowering the temperature of electronic devices.
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Affiliation(s)
- Yunjing Wang
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China
| | - Shuang Xia
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, China
| | - Guang Xiao
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China
| | - Jiangtao Di
- Key Lab of Nano-Devices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Jianfeng Wang
- College of Materials Science and Engineering, Hunan University, Changsha 410082, China
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Salapare HS, Balbarona JA, Clerc L, Bassoleil P, Zenerino A, Amigoni S, Guittard F. Cupric Oxide Nanostructures from Plasma Surface Modification of Copper. Biomimetics (Basel) 2019; 4:biomimetics4020042. [PMID: 31242664 PMCID: PMC6631021 DOI: 10.3390/biomimetics4020042] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/14/2019] [Accepted: 06/20/2019] [Indexed: 11/24/2022] Open
Abstract
Taking inspiration from the hydrophilic and superhydrophilic properties observed from the nanostructures present on the leaves of plants such as Alocasia odora, Calathea zebrina, and Ruelia devosiana, we were able to synthesize cupric oxide (CuO) nanostructures from the plasma surface modification of copper (Cu) that exhibits hydrophilic and superhydrophilic properties. The Cu sheets were exposed to oxygen plasma produced from the P300 plasma device (Alliance Concept, Cran-Gevrier, France) at varying power, irradiation times, gas flow rates, and pulsing duty cycles. The untreated and plasma-treated Cu sheets were characterized by contact angle measurements, scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS) to determine the changes in the surface of Cu before and after plasma treatment. Results showed that plasma-treated Cu sheets exhibited enhanced wetting properties compared to untreated Cu. We attributed the decrease in the measured water contact angles after plasma treatment to increased surface roughness, formation of CuO nanostructures, and transformation of Cu to either CuO2 or Cu2O3. The presence of the CuO nanostructures on the surface of Cu is very useful in terms of its possible applications, such as: (1) in antimicrobial and anti-fouling tubing; (2) in the improvement of heat dissipation devices, such as microfluidic cooling systems and heat pipes; and (3) as an additional protection to Cu from further corrosion. This study also shows the possible mechanisms on how CuO, CuO2, and Cu2O3 were formed from Cu based on the varying the plasma parameters.
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Affiliation(s)
- Hernando S Salapare
- Université Côte d'Azur, NICE Lab, IMREDD, 06100 Nice, France.
- Faculty of Education, University of the Philippines Open University, Los Baños 4030, Laguna, Philippines.
| | - Juvy A Balbarona
- Department of Mechanical Engineering, College of Engineering University of the Philippines Diliman, Quezon City 1101, Philippines.
| | - Léo Clerc
- Université Côte d'Azur, NICE Lab, IMREDD, 06100 Nice, France.
| | | | - Arnaud Zenerino
- Université Côte d'Azur, NICE Lab, IMREDD, 06100 Nice, France.
| | - Sonia Amigoni
- Université Côte d'Azur, NICE Lab, IMREDD, 06100 Nice, France.
| | - Frédéric Guittard
- Université Côte d'Azur, NICE Lab, IMREDD, 06100 Nice, France.
- Department of Bioengineering, University of California Riverside, Materials Science and Engineering Building, 900 University Avenue, Riverside, CA 92521, USA.
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Richtar J, Heinrichova P, Apaydin DH, Schmiedova V, Yumusak C, Kovalenko A, Weiter M, Sariciftci NS, Krajcovic J. Novel Riboflavin-Inspired Conjugated Bio-Organic Semiconductors. Molecules 2018; 23:E2271. [PMID: 30189689 PMCID: PMC6225382 DOI: 10.3390/molecules23092271] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 08/27/2018] [Accepted: 08/31/2018] [Indexed: 11/23/2022] Open
Abstract
Flavins are known to be extremely versatile, thus enabling routes to innumerable modifications in order to obtain desired properties. Thus, in the present paper, the group of bio-inspired conjugated materials based on the alloxazine core is synthetized using two efficient novel synthetic approaches providing relatively high reaction yields. The comprehensive characterization of the materials, in order to evaluate the properties and application potential, has shown that the modification of the initial alloxazine core with aromatic substituents allows fine tuning of the optical bandgap, position of electronic orbitals, absorption and emission properties. Interestingly, the compounds possess multichromophoric behavior, which is assumed to be the results of an intramolecular proton transfer.
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Affiliation(s)
- Jan Richtar
- Faculty of Chemistry, Materials Research Centre, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic.
| | - Patricie Heinrichova
- Faculty of Chemistry, Materials Research Centre, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic.
| | - Dogukan Hazar Apaydin
- Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenbergerstraße 69, 4040 Linz, Austria.
| | - Veronika Schmiedova
- Faculty of Chemistry, Materials Research Centre, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic.
| | - Cigdem Yumusak
- Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenbergerstraße 69, 4040 Linz, Austria.
| | - Alexander Kovalenko
- Faculty of Chemistry, Materials Research Centre, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic.
| | - Martin Weiter
- Faculty of Chemistry, Materials Research Centre, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic.
| | - Niyazi Serdar Sariciftci
- Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenbergerstraße 69, 4040 Linz, Austria.
| | - Jozef Krajcovic
- Faculty of Chemistry, Materials Research Centre, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic.
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Choi JK, El Assal R, Ng N, Ginsburg E, Maas RL, Anchan RM, Demirci U. Bio-inspired solute enables preservation of human oocytes using minimum volume vitrification. J Tissue Eng Regen Med 2017; 12:e142-e149. [PMID: 28481448 DOI: 10.1002/term.2439] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 12/20/2016] [Revised: 04/13/2017] [Accepted: 05/03/2017] [Indexed: 12/20/2022]
Abstract
The ability to cryopreserve human oocytes has significant potential for fertility preservation. Current cryopreservation methods still suffer from the use of conventional cryoprotectants, such as dimethyl sulphoxide (DMSO), causing loss of viability and function. Such injuries result from the toxicity and high concentration of cryoprotectants, as well as mechanical damage of cells due to ice crystal formation during the cooling and rewarming processes. Here we report the preservation of human oocytes following vitrification using an innovative bio-inspired cryoprotectant integrated with a minimum volume vitrification approach. The results demonstrate that the recovered human oocytes maintained viability following vitrification and rewarming. Moreover, when this approach was used to vitrify mouse oocytes, the recovered oocytes preserved their viability and function following vitrification and rewarming. This bio-inspired approach substitutes DMSO, a well-known toxic cryoprotectant, with ectoine, a non-toxic naturally occurring solute. The bio-inspired vitrification approach has the potential to improve fertility preservation for women undergoing cancer treatment and endangered mammal species.
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Affiliation(s)
- Jung Kyu Choi
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratories, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, Stanford University School of Medicine, Palo Alto, California, USA
| | - Rami El Assal
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratories, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, Stanford University School of Medicine, Palo Alto, California, USA
| | - Nicholas Ng
- Center for Infertility and Reproductive Surgery, Department of Obstetrics Gynecology, and Reproductive Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Elizabeth Ginsburg
- Center for Infertility and Reproductive Surgery, Department of Obstetrics Gynecology, and Reproductive Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Richard L Maas
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Raymond M Anchan
- Center for Infertility and Reproductive Surgery, Department of Obstetrics Gynecology, and Reproductive Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Utkan Demirci
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratories, Canary Center at Stanford for Early Cancer Detection, Department of Radiology, Stanford University School of Medicine, Palo Alto, California, USA.,Department of Electrical Engineering, Stanford University School of Engineering by courtesy, Palo Alto, California, USA
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