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Xu X, Xia Y, Qian J, Yu H, Zhong Y, Wang F, Zhou C, Ni H. Roles of Proton in the Formation of Particles: Soap‐free Emulsion Polymerization of Styrene using AIBN and Potassium Persulfate as Initiators. ChemistrySelect 2021. [DOI: 10.1002/slct.202004321] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Xiuhang Xu
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
| | - Yunfei Xia
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
| | - Jiajia Qian
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
| | - Haihua Yu
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
| | - Yangyang Zhong
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
| | - Fei Wang
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
| | - Chuan Zhou
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
| | - Henmei Ni
- School of Chemistry and Chemical Engineering Southeast University Southeast University Road 2 Jiangning, Nanjing 211189 China
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Hejčl A, Růžička J, Proks V, Macková H, Kubinová Š, Tukmachev D, Cihlář J, Horák D, Jendelová P. Dynamics of tissue ingrowth in SIKVAV-modified highly superporous PHEMA scaffolds with oriented pores after bridging a spinal cord transection. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:89. [PMID: 29938301 DOI: 10.1007/s10856-018-6100-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 06/05/2018] [Indexed: 06/08/2023]
Abstract
While many types of biomaterials have been evaluated in experimental spinal cord injury (SCI) research, little is known about the time-related dynamics of the tissue infiltration of these scaffolds. We analyzed the ingrowth of connective tissue, axons and blood vessels inside the superporous poly (2-hydroxyethyl methacrylate) hydrogel with oriented pores. The hydrogels, either plain or seeded with mesenchymal stem cells (MSCs), were implanted in spinal cord transection at the level of Th8. The animals were sacrificed at days 2, 7, 14, 28, 49 and 6 months after SCI and histologically evaluated. We found that within the first week, the hydrogels were already infiltrated with connective tissue and blood vessels, which remained stable for the next 6 weeks. Axons slowly and gradually infiltrated the hydrogel within the first month, after which the numbers became stable. Six months after SCI we observed rare axons crossing the hydrogel bridge and infiltrating the caudal stump. There was no difference in the tissue infiltration between the plain hydrogels and those seeded with MSCs. We conclude that while connective tissue and blood vessels quickly infiltrate the scaffold within the first week, axons show a rather gradual infiltration over the first month, and this is not facilitated by the presence of MSCs inside the hydrogel pores. Further research which is focused on the permissive micro-environment of the hydrogel scaffold is needed, to promote continuous and long-lasting tissue regeneration across the spinal cord lesion.
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Affiliation(s)
- Aleš Hejčl
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20, Prague, Czech Republic.
- Department of Neurosurgery, J. E. Purkinje University, Masaryk Hospital, Sociální péče 12A, 401 13, Ústí nad Labem, Czech Republic.
| | - Jiří Růžička
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20, Prague, Czech Republic
- Department of Neuroscience, 2nd Faculty of Medicine, Charles University, V Úvalu 84, 150 06, Prague 5, Czech Republic
| | - Vladimír Proks
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám.2, 162 06, Praha 6, Břevnov, Czech Republic
| | - Hana Macková
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám.2, 162 06, Praha 6, Břevnov, Czech Republic
| | - Šárka Kubinová
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20, Prague, Czech Republic
| | - Dmitry Tukmachev
- Department of Neurosurgery, Motol University Hospital, V Úvalu 84, Prague 5, 150 06, Czech Republic
| | - Jiří Cihlář
- Department of Mathematics, Faculty of Science, J. E. Purkyně University, České mládeže 8, 400 96, Ústí nad Labem, Czech Republic
| | - Daniel Horák
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám.2, 162 06, Praha 6, Břevnov, Czech Republic
| | - Pavla Jendelová
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20, Prague, Czech Republic
- Department of Neuroscience, 2nd Faculty of Medicine, Charles University, V Úvalu 84, 150 06, Prague 5, Czech Republic
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Zhang Y, Dong C, Su L, Wang H, Gong X, Wang H, Liu J, Chang J. Multifunctional Microspheres Encoded with Upconverting Nanocrystals and Magnetic Nanoparticles for Rapid Separation and Immunoassays. ACS APPLIED MATERIALS & INTERFACES 2016; 8:745-753. [PMID: 26653130 DOI: 10.1021/acsami.5b09913] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Immunoassays based on the downconversion target materials (organic dyes or quantum dots) lead to fairly strong spectral interference between the coded signal and reporter signal, which seriously affects the detection accuracy and hampers their applications. In this work, a new kind of upconverting nanocrystals encoded magnetic microspheres (UCNMMs) were designed and prepared successfully to solve the problem mentioned above. The UCNMMs were obtained by incorporating magnetic Fe3O4 nanoparticles and upconverting nanocrystals with polystyrene microspheres. Due to that upconverting nanocrystals (UCNs) and reporter signals are excitated by near-infrared and UV/visible light separately, immunoassays based on UCNMMs do not occur optical spectral interferences. Furthermore, these new functionalized UCNMMs have excellent properties in binding biomolecules and fast separating, which would have large potential applications in multiplexed assays.
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Affiliation(s)
- Ying Zhang
- Institute of Nanobiotechnology, School of Life Sciences, Tianjin University , Tianjin, 300072, People's Republic of China
| | - Chunhong Dong
- Institute of Nanobiotechnology, School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, People's Republic of China
| | - Lin Su
- Institute of Nanobiotechnology, School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, People's Republic of China
| | - Hanjie Wang
- Institute of Nanobiotechnology, School of Life Sciences, Tianjin University , Tianjin, 300072, People's Republic of China
| | - Xiaoqun Gong
- Institute of Nanobiotechnology, School of Life Sciences, Tianjin University , Tianjin, 300072, People's Republic of China
| | - Huiquan Wang
- School of Electronics and Information Engineering, Tianjin Polytechnic University , Tianjin 300387, People's Republic of China
| | - Junqing Liu
- Institute of Nanobiotechnology, School of Materials Science and Engineering, Tianjin University , Tianjin, 300072, People's Republic of China
| | - Jin Chang
- Institute of Nanobiotechnology, School of Life Sciences, Tianjin University , Tianjin, 300072, People's Republic of China
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Akhavan B, Jarvis K, Majewski P. Development of negatively charged particulate surfaces through a dry plasma-assisted approach. RSC Adv 2015. [DOI: 10.1039/c4ra13767a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
A completely dry method has been introduced for the development of negatively charged oxidized sulfur-terminated particles.
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Affiliation(s)
- Behnam Akhavan
- School of Engineering
- Mawson Institute
- University of South Australia
- Mawson Lakes
- Australia
| | - Karyn Jarvis
- School of Engineering
- Mawson Institute
- University of South Australia
- Mawson Lakes
- Australia
| | - Peter Majewski
- School of Engineering
- Mawson Institute
- University of South Australia
- Mawson Lakes
- Australia
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Kubinová Š, Horák D, Hejčl A, Plichta Z, Kotek J, Proks V, Forostyak S, Syková E. SIKVAV-modified highly superporous PHEMA scaffolds with oriented pores for spinal cord injury repair. J Tissue Eng Regen Med 2013; 9:1298-309. [DOI: 10.1002/term.1694] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 10/31/2012] [Accepted: 12/20/2012] [Indexed: 12/14/2022]
Affiliation(s)
- Šárka Kubinová
- Institute of Experimental Medicine; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Daniel Horák
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Aleš Hejčl
- Institute of Experimental Medicine; Academy of Sciences of the Czech Republic; Prague Czech Republic
- Department of Neurosurgery, Masaryk Hospital; Ústí nad Labem Czech Republic
| | - Zdeněk Plichta
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Jiří Kotek
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Vladimír Proks
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Serhiy Forostyak
- Institute of Experimental Medicine; Academy of Sciences of the Czech Republic; Prague Czech Republic
| | - Eva Syková
- Institute of Experimental Medicine; Academy of Sciences of the Czech Republic; Prague Czech Republic
- Department of Neuroscience; 2nd Medical Faculty, Charles University; Prague Czech Republic
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