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Huang H, Zhang P, Tang M, Shen L, Yu Z, Shi H, Tian Y. Biocompatibility of micro/nano structures on the surface of Ti6Al4V and Ti-based bulk metallic glasses induced by femtosecond laser. BIOMATERIALS ADVANCES 2022; 139:212998. [PMID: 35882146 DOI: 10.1016/j.bioadv.2022.212998] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 06/06/2022] [Accepted: 06/19/2022] [Indexed: 06/15/2023]
Abstract
Femtosecond laser surface modification has been proved to be a versatile technology to create various functional materials by modifying solid surface properties. An interesting experimental phenomenon is found by exposing a Ti6Al4V alloy and Ti-based metallic glass to femtosecond laser irradiation. The research results show that the femtosecond laser induces different micro-nano structures on the surfaces of Ti6Al4V alloy and Ti-based metallic glass. Spherical structure and LIPSS (Laser-induced periodic surface structures) can be formed on the surface of Ti6Al4V alloy after femtosecond laser irradiation. On the surface of Ti-based metallic glass, LIPSS, SWPSS (Super-wavelength periodic surface structure) and neatly arranged microholes structures can be found. Under the same laser parameters, the micro-nano structures showed different evolution trends on the Ti6Al4V alloy and Ti-based metallic glass surfaces. The difference in surface structure between Ti6Al4V alloy and Ti-based metallic glass is since amorphous materials have no crystal lattice and a fixed melting temperature. In addition, there are differences in the biocompatibility of different surface structures. The size and distance of the micro-pits on the surface of different structures determine the ability of cells to adhesion, proliferate and differentiate. This conclusion has important significance for the application of Ti6Al4V alloy and Ti-based metallic glass in the field of biomedicine.
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Affiliation(s)
- Hanxuan Huang
- School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; Shanghai Collaborative Innovation Center of Laser of Manufacturing Technology, Shanghai 201620, China
| | - Peilei Zhang
- School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; Shanghai Collaborative Innovation Center of Laser of Manufacturing Technology, Shanghai 201620, China; Fraunhofer Institute for Laser Technology ILT, Aachen 52074, Germany.
| | - Man Tang
- School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; Shanghai Collaborative Innovation Center of Laser of Manufacturing Technology, Shanghai 201620, China
| | - Lei Shen
- School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; Shanghai Collaborative Innovation Center of Laser of Manufacturing Technology, Shanghai 201620, China
| | - Zhishui Yu
- School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; Shanghai Collaborative Innovation Center of Laser of Manufacturing Technology, Shanghai 201620, China.
| | - Haichuan Shi
- School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China; Shanghai Collaborative Innovation Center of Laser of Manufacturing Technology, Shanghai 201620, China
| | - Yingtao Tian
- Department of Engineering, Lancaster University, Lancaster LA1 4YW, United Kingdom
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Sheng L, Li M, Zheng S, Qi J. Adjusting the accuracy of PEGDA-GelMA vascular network by dark pigments via digital light processing printing. J Biomater Appl 2021; 36:1173-1187. [PMID: 34738507 DOI: 10.1177/08853282211053081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vascularization is one of the most important factors greatly influencing scaffold regeneration. In this study, a precise network of hollow vessels was printed by digital light processing (DLP) with poly(ethylene glycol) diacrylate (PEGDA)/gelatin-methacryloyl (GelMA), and dark pigmentation absorbers were added to ensure printing accuracy. First, the compound bio-inks of the PEGDA-GelMA hydrogel were prepared for direct vascular printing, and a high-precision DLP system was established. Second, the printing effects of three dark absorbers, namely, nigrosin, brilliant black, and brilliant blue, on the x-, y-, and z-axes were studied. By printing models with different densities, it was determined that 0.2% nigrosin, 0.1% brilliant black, and 0.3% brilliant blue had better effects on the x- and y-axes accuracy, and the absorbance of the absorbers played a decisive role in adjusting the accuracy. Additionally, to solve the problem of uneven curing on the upper and lower surfaces caused by the addition of an absorber with high absorbance, a model of the difference in curing width between the upper and lower surfaces of a unit-layer slice based on high-absorbance absorbers was established, and the reference value for the slice thickness was calculated. Third, the biological and mechanical properties of the bio-inks were verified with scanning electron microscopy and Fourier transform infrared, and by tensile, swelling, degradation, and cytotoxicity tests on different concentrations of PEGDA-GelMA hydrogel and absorbers. The results showed that 30% PEGDA-7% GelMA/0.1% brilliant black was the optimal preparation to print a hollow vascular network. The error of the printing tube wall and cavity was between 1% and 3%, which demonstrates the high precision of the method. Human umbilical vein endothelial cells were planted in the lumen, and the survival rate achieved 107% on the seventh day, demonstrating the good biocompatibility of the composite hydrogel.
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Affiliation(s)
- Lin Sheng
- 12605Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China
| | - Mo Li
- 12605Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China
| | - Shuxian Zheng
- 12605Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin, China
| | - Jian Qi
- 66270School of Mechanical Engineering, Tianjin University of Technology and Education, China
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Seo Y, Kim S, Lee HS, Park J, Lee K, Jun I, Seo H, Kim YJ, Yoo Y, Choi BC, Seok HK, Kim YC, Ok MR, Choi J, Joo CK, Jeon H. Femtosecond laser induced nano-textured micropatterning to regulate cell functions on implanted biomaterials. Acta Biomater 2020; 116:138-148. [PMID: 32890750 DOI: 10.1016/j.actbio.2020.08.044] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 08/26/2020] [Accepted: 08/27/2020] [Indexed: 12/15/2022]
Abstract
Posterior capsular opacification (PCO) is the most common complication of cataract surgery. PCO is due to the proliferation, migration, and epithelial-to-mesenchymal transition of the residual lens epithelial cells (LECs) within the lens capsule. As surface topography influences cellular response, we investigated the effect of modulating the dimensions of periodic nano-textured patterns on the surface of an intraocular lens material to regulate lens epithelial cell functions such as cell adhesion, migration, orientation, and proliferation. Patterned poly(HEMA) samples were prepared by a femtosecond laser microfabrication, and the behaviors of human B-3 LECs were observed on groove/ridge patterns with widths varying from 5 to 40 µm. In the presence of ridge and groove patterns, the adherent cells elongated along the direction of the patterns, and f-actin of the cells was spread to a lesser extent on the nano-textured groove surfaces. Both single and collective cell migrations were significantly inhibited in the perpendicular direction of the patterns on the nano-textured micro-patterned samples. We also fabricated the patterns on the curved surface of a commercially available intraocular lens for in vivo evaluation. In vivo results showed that a patterned IOL could help suppress the progression of PCO by inhibiting cell migration from the edge to the center of the IOL. Our reports demonstrate that nano- and microscale topographical patterns on a biomaterial surface can regulate cellular behavior when it is implanted into animals.
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Affiliation(s)
- Youngmin Seo
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea
| | - Saeromi Kim
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea
| | - Hyun Soo Lee
- Catholic Institute of Visual Science, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea; Department of Ophthalmology, Catholic Institute for Visual Science, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Jaeho Park
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea
| | - Kyungwoo Lee
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea; School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Indong Jun
- Environmental Safety Group, Korea Institute of Science and Technology Europe Forschungsgesellschaft mbH, Saarbrucken 66123, Germany
| | - Hyunseon Seo
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea
| | - Young Jin Kim
- Public Problem Research Team, National Institute of Mathematical and Sciences, Daejeon 34037, Republic of Korea
| | - Youngsik Yoo
- Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | | | - Hyun-Kwang Seok
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea; Division of Bio-Medical Science and Technology, Korea Institute of Science and Technology School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Yu-Chan Kim
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea; Division of Bio-Medical Science and Technology, Korea Institute of Science and Technology School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Myoung-Ryul Ok
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea
| | - Jonghoon Choi
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Choun-Ki Joo
- CK Saint Mary's Eye Center, Seoul 06531, Republic of Korea.
| | - Hojeong Jeon
- Center for Biomaterials, Korea Institute of Science & Technology, Seoul 02792, Republic of Korea; Division of Bio-Medical Science and Technology, Korea Institute of Science and Technology School, Korea University of Science and Technology, Seoul 02792, Republic of Korea.
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Baek J, Jung WB, Cho Y, Lee E, Yun GT, Cho SY, Jung HT, Im SG. Facile Fabrication of High-Definition Hierarchical Wrinkle Structures for Investigating the Geometry-Sensitive Fate Commitment of Human Neural Stem Cells. ACS APPLIED MATERIALS & INTERFACES 2019; 11:17247-17255. [PMID: 31009192 DOI: 10.1021/acsami.9b03479] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
As neural stem cells (NSCs) interact with biophysical cues from their niche during development, it is important to understand the biomolecular mechanism of how the NSCs process these biophysical cues to regulate their behaviors. In particular, anisotropic geometric cues in micro-/nanoscale have been utilized to investigate the biophysical effect of the structure on NSCs behaviors. Here, a series of new nanoscale anisotropic wrinkle structures with the a range of wavelength scales (from 50 nm to 37 μm) was developed to demonstrate the effect of the anisotropic nanostructure on the fate commitment of NSCs. Intriguingly, two distinct characteristic length scales promoted the neurogenesis. Each wavelength scale showed a striking variation in terms of dependency on the directionality of the structures, suggesting the existence of at least two different ways in the processing of anisotropic geometries for neurogenesis. Furthermore, the combined effect of the two distinctive length scales was observed by employing hierarchical multiscale wrinkle structures with two characteristic neurogenesis-promoting wavelengths. Taken together, the wrinkle structure system developed in this study can serve as an effective platform to advance the understanding of how cells sense anisotropic geometries for their specific cellular behaviors. Furthermore, this could provide clues for improving nerve regeneration system of stem cell therapies.
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Affiliation(s)
- Jieung Baek
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
| | - Woo-Bin Jung
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
- KAIST Institute for Nanocentury , 291 Daehak-ro , Daejeon 34141 , Korea
| | - Younghak Cho
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
| | - Eunjung Lee
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
| | - Geun-Tae Yun
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
- KAIST Institute for Nanocentury , 291 Daehak-ro , Daejeon 34141 , Korea
| | - Soo-Yeon Cho
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
- KAIST Institute for Nanocentury , 291 Daehak-ro , Daejeon 34141 , Korea
| | - Hee-Tae Jung
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
- KAIST Institute for Nanocentury , 291 Daehak-ro , Daejeon 34141 , Korea
| | - Sung Gap Im
- Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , 291 Daehak-ro , Daejeon 34141 , Korea
- KAIST Institute for Nanocentury , 291 Daehak-ro , Daejeon 34141 , Korea
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Xue D, Wang Y, Zhang J, Mei D, Wang Y, Chen S. Projection-Based 3D Printing of Cell Patterning Scaffolds with Multiscale Channels. ACS APPLIED MATERIALS & INTERFACES 2018; 10:19428-19435. [PMID: 29782142 DOI: 10.1021/acsami.8b03867] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To fully actualize artificial, cell-laden biological models in tissue engineering, such as 3D organoids and organs-on-a-chip systems, cells need to be patterned such that they can precisely mimic natural microenvironments in vitro. Despite increasing interest in this area, patterning cells at multiscale (∼10 μm to 10 mm) remains a significant challenge in bioengineering. Here, we report a projection-based 3D printing system that achieves rapid and high-resolution fabrication of hydrogel scaffolds featuring intricate channels for multiscale cell patterning. Using this system, we were able to use biocompatible poly(ethylene glycol)diacrylate in fabricating a variety of scaffold architectures, ranging from regular geometries such as serpentine, spiral, and fractal-like to more irregular/intricate geometries, such as biomimetic arborescent and capillary networks. A red food dye solution was able to freely fill all channels in the scaffolds, from the trunk (>1100 μm in width) to the small branch (∼17 μm in width) without an external pump. The dimensions of the printed scaffolds remained stable over 3 days while being immersed in Dulbecco's phosphate-buffered saline at 37 °C, and a penetration analysis revealed that these scaffolds are suitable for metabolic and nutrient transport. Cell patterning experiments showed that red fluorescent protein-transfected A549 human nonsmall lung cancer cells adhered well in the scaffolds' channels, and showed further attachment and penetration during cell culture proliferation.
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Affiliation(s)
- Dai Xue
- Department of NanoEngineering , University of California , San Diego , California 92093 , United States
| | | | - Jiaxin Zhang
- Department of Toxicology , Fourth Military Medical University , Xi'an 710032 , China
| | | | | | - Shaochen Chen
- Department of NanoEngineering , University of California , San Diego , California 92093 , United States
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