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Lim H, Seo Y, Kwon D, Kang S, Yu J, Park H, Lee SD, Lee T. Recent Progress in Diatom Biosilica: A Natural Nanoporous Silica Material as Sustained Release Carrier. Pharmaceutics 2023; 15:2434. [PMID: 37896194 PMCID: PMC10609864 DOI: 10.3390/pharmaceutics15102434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 09/27/2023] [Accepted: 10/04/2023] [Indexed: 10/29/2023] Open
Abstract
A drug delivery system (DDS) is a useful technology that efficiently delivers a target drug to a patient's specific diseased tissue with minimal side effects. DDS is a convergence of several areas of study, comprising pharmacy, medicine, biotechnology, and chemistry fields. In the traditional pharmacological concept, developing drugs for disease treatment has been the primary research field of pharmacology. The significance of DDS in delivering drugs with optimal formulation to target areas to increase bioavailability and minimize side effects has been recently highlighted. In addition, since the burst release found in various DDS platforms can reduce drug delivery efficiency due to unpredictable drug loss, many recent DDS studies have focused on developing carriers with a sustained release. Among various drug carriers, mesoporous silica DDS (MS-DDS) is applied to various drug administration routes, based on its sustained releases, nanosized porous structures, and excellent solubility for poorly soluble drugs. However, the synthesized MS-DDS has caused complications such as toxicity in the body, long-term accumulation, and poor excretion ability owing to acid treatment-centered manufacturing methods. Therefore, biosilica obtained from diatoms, as a natural MS-DDS, has recently emerged as an alternative to synthesized MS-DDS. This natural silica carrier is an optimal DDS platform because culturing diatoms is easy, and the silica can be separated from diatoms using a simple treatment. In this review, we discuss the manufacturing methods and applications to various disease models based on the advantages of biosilica.
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Affiliation(s)
- Hayeon Lim
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea; (H.L.); (Y.S.); (S.K.); (J.Y.); (H.P.)
| | - Yoseph Seo
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea; (H.L.); (Y.S.); (S.K.); (J.Y.); (H.P.)
| | - Daeryul Kwon
- Protist Research Team, Microbial Research Department, Nakdonggang National Institute of Biological Resources (NNIBR), 137, Donam 2-gil, Sangju-si 37242, Republic of Korea;
| | - Sunggu Kang
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea; (H.L.); (Y.S.); (S.K.); (J.Y.); (H.P.)
| | - Jiyun Yu
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea; (H.L.); (Y.S.); (S.K.); (J.Y.); (H.P.)
| | - Hyunjun Park
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea; (H.L.); (Y.S.); (S.K.); (J.Y.); (H.P.)
| | - Sang Deuk Lee
- Protist Research Team, Microbial Research Department, Nakdonggang National Institute of Biological Resources (NNIBR), 137, Donam 2-gil, Sangju-si 37242, Republic of Korea;
| | - Taek Lee
- Department of Chemical Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-gu, Seoul 01897, Republic of Korea; (H.L.); (Y.S.); (S.K.); (J.Y.); (H.P.)
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Shafiei N, Nasrollahzadeh M, Iravani S. Green Synthesis of Silica and Silicon Nanoparticles and Their Biomedical and Catalytic Applications. COMMENT INORG CHEM 2021. [DOI: 10.1080/02603594.2021.1904912] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Nasrin Shafiei
- Department of Chemistry, Faculty of Science, University of Qom, Qom, Iran
| | | | - Siavash Iravani
- Faculty of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
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Xu Z, Huang JW, Xia CJ, Zou SP, Xue YP, Zheng YG. Enhanced catalytic stability and reusability of nitrilase encapsulated in ethyleneamine-mediated biosilica for regioselective hydrolysis of 1-cyanocycloalkaneacetonitrile. Int J Biol Macromol 2019; 130:117-124. [DOI: 10.1016/j.ijbiomac.2019.02.131] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 02/22/2019] [Accepted: 02/22/2019] [Indexed: 01/08/2023]
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Muderrisoglu C, Yesil-Celiktas O. High-Yield Biocatalysis of Baicalein 7-O-β-d-Glucuronide to Baicalein Using Soluble Helix pomatia-Derived β-Glucuronidase in a Chemically Defined Acidic Medium. Catal Letters 2019. [DOI: 10.1007/s10562-019-02745-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Monolithic biocatalytic systems with enhanced stabilities constructed through biomimetic silicification-induced enzyme immobilization on rGO/FeOOH hydrogel. Biochem Eng J 2017. [DOI: 10.1016/j.bej.2016.11.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Gao J, Li D, Jiang Y, Ma L, Zhou L, He Y. Pickering Emulsion Stabilized by Immobilized Bienzyme Nanoparticles: A Novel and Robust System for Enzymatic Purification of Isomaltooligosaccharide. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5023628] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jing Gao
- School of Chemical Engineering
and Technology, Hebei University of Technology, Tianjin 300130, P.R. China
| | - Dan Li
- School of Chemical Engineering
and Technology, Hebei University of Technology, Tianjin 300130, P.R. China
| | - Yanjun Jiang
- School of Chemical Engineering
and Technology, Hebei University of Technology, Tianjin 300130, P.R. China
| | - Li Ma
- School of Chemical Engineering
and Technology, Hebei University of Technology, Tianjin 300130, P.R. China
| | - Liya Zhou
- School of Chemical Engineering
and Technology, Hebei University of Technology, Tianjin 300130, P.R. China
| | - Ying He
- School of Chemical Engineering
and Technology, Hebei University of Technology, Tianjin 300130, P.R. China
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Passos MLC, Pereira M, Saraiva MLMFS, Rangel M, Moniz T, Santos JLM, Frigerio C. Silica nanostructures synthesis and CdTe quantum dots immobilization for photocatalytical applications. RSC Adv 2014. [DOI: 10.1039/c4ra09748c] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new strategy for the immobilization of semiconductor nanocrystals by carrying out in simultaneous the biomimetic synthesis of silica nanostructures and the encapsulation of MPA-capped CdTe quantum dots (QDs).
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Affiliation(s)
- Marieta L. C. Passos
- REQUIMTE
- Departamento de Ciências Químicas
- Faculdade de Farmácia
- Universidade do Porto
- 4050-313 Porto, Portugal
| | - Mariana Pereira
- REQUIMTE
- Departamento de Ciências Químicas
- Faculdade de Farmácia
- Universidade do Porto
- 4050-313 Porto, Portugal
| | - M. Lúcia M. F. S. Saraiva
- REQUIMTE
- Departamento de Ciências Químicas
- Faculdade de Farmácia
- Universidade do Porto
- 4050-313 Porto, Portugal
| | - Maria Rangel
- REQUIMTE
- Instituto de Ciências Biomédicas de Abel Salazar
- Universidade do Porto
- 4050-313, Porto, Portugal
| | - Tania Moniz
- REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto, Portugal
| | - João L. M. Santos
- REQUIMTE
- Departamento de Ciências Químicas
- Faculdade de Farmácia
- Universidade do Porto
- 4050-313 Porto, Portugal
| | - Christian Frigerio
- REQUIMTE
- Departamento de Química e Bioquímica
- Faculdade de Ciências
- Universidade do Porto
- 4169-007 Porto, Portugal
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Shi J, Jiang Z. An efficient and recyclable enzyme catalytic system constructed through the synergy between biomimetic mineralization and polyamine–salt aggregate assembly. J Mater Chem B 2014; 2:4435-4441. [DOI: 10.1039/c4tb00440j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Shi J, Zhang X, Zhang S, Wang X, Jiang Z. Incorporating mobile nanospheres in the lumen of hybrid microcapsules for enhanced enzymatic activity. ACS APPLIED MATERIALS & INTERFACES 2013; 5:10433-10436. [PMID: 24164487 DOI: 10.1021/am404210m] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Physical encapsulation of enzymes in microcapsules, as a mild, controllable method, has been widely utilized for enzyme immobilization. However, this method often suffers from the big mass transfer resistance from the capsule lumen. In this study, a novel biocatalysis system with enhanced catalytic activity is constructed through coencapsulating enzymes and nanospheres in the lumen of protamine/silica hybrid microcapsules, which are synthesized through the synergy of biomimetic silicification and layer-by-layer (LbL) assembly. When utilized as the host for catalase (CAT) encapsulation, the hybrid microcapsules maintain high mechanical stability, high enzyme loading, and low enzyme leaching. Particularly, because of the existence of mobile nanospheres, the mass transfer resistance in the microcapsules is significantly reduced because of the vigorous agitation, thus acquiring an enhanced catalytic activity. Our strategy may also find applications in drug delivery and biosensor fields.
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Affiliation(s)
- Jiafu Shi
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University , Tianjin 300072, China
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Abstract
Clinical management of diabetes must overcome the challenge of in vivo glucose sensors exhibiting lifetimes of only a few days. Limited sensor life originates from compromised enzyme stability of the sensing enzyme. Sensing enzymes degrade in the presence of low molecular weight materials (LMWM) and hydrogen peroxide in vivo. Sensing enzymes could be made to withstand these degradative effects by (1) stabilizing the microenvironment surrounding the sensing enzyme or (2) improving the structural stability of the sensing enzyme genetically. We review the degradative effect of LMWM and hydrogen peroxide on the sensing enzyme glucose oxidase (GOx). In addition, we examine advances in stabilizing GOx against degradation using hybrid silica gels and genetic engineering of GOx. We conclude molecularly engineered GOx combined with silica-based encapsulation provides an avenue for designing long-term in vivo sensor systems.
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Affiliation(s)
- James M Harris
- Department of Biomedical Engineering, Research Triangle Materials Research Science and Engineering Center, Duke University, Durham, NC 27708, USA.
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Passos ML, Lima JL, Saraiva MLM. Laccase–biosilica nanostructures — A miniaturized automatic approach. CAN J CHEM 2013. [DOI: 10.1139/cjc-2012-0193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present work, an automatic generic tool for performing different syntheses of biosilica nanoparticles and the encapsulation of enzymes at the same time is described. Sequential injection analysis (SIA) allowed automation, since it enables the precise and exact control of fluidic manipulations as well as reaction conditions essential for achieving repeatable and reproducible hydrolysis, nucleation, and particle growth. An effective computer control of all the analytical parameters during run time ensured the testing of different templates, silicic acid precursors, and reaction conditions (flow rates, flow reversal, mixing, order of reagents added, pH, etc.) without physical reconfiguration of the flow setup. The effect of tetramethyl orthosilicate, sodium silicate, polyethylenimine, and protamine was evaluated not only for the morphology and size of obtained nanoparticles, but also for the stability and consequently the activity of laccase, the enzyme selected for this demonstration. This activity was evaluated using the spectrophotometric measurement (at 415 nm) of the 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) cationic radical, which results from the action of the encapsulated enzyme. The results obtained showed advantages, namely, reproducibility between all the samples used when compared with the small-scale batch-based process, and the absence of clogging due to the operational characteristics of the SIA technique. Besides the benign reaction conditions, such as ambient temperatures, physiological pH range, and aqueous solvents, this automatic procedure was shown to be a rapid, simple, and more sensitive alternative method for the enzyme immobilization that results in the physical entrapment of enzymes within silica nanospheres as they are formed.
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Affiliation(s)
- Marieta L.C. Passos
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - José L.F.C. Lima
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - M. Lúcia M.F.S. Saraiva
- REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
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Forsyth C, Yip TWS, Patwardhan SV. CO2sequestration by enzyme immobilized onto bioinspired silica. Chem Commun (Camb) 2013; 49:3191-3. [DOI: 10.1039/c2cc38225c] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Forsyth C, Patwardhan SV. Controlling performance of lipase immobilised on bioinspired silica. J Mater Chem B 2013; 1:1164-1174. [DOI: 10.1039/c2tb00462c] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Marshall KE, Robinson EW, Hengel SM, Paša-Tolić L, Roesijadi G. FRET imaging of diatoms expressing a biosilica-localized ribose sensor. PLoS One 2012; 7:e33771. [PMID: 22470473 PMCID: PMC3309933 DOI: 10.1371/journal.pone.0033771] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 02/21/2012] [Indexed: 11/18/2022] Open
Abstract
Future materials are envisioned to include bio-assembled, hybrid, three-dimensional nanosystems that incorporate functional proteins. Diatoms are amenable to genetic modification for localization of recombinant proteins in the biosilica cell wall. However, the full range of protein functionalities that can be accommodated by the modified porous biosilica has yet to be described. Our objective was to functionalize diatom biosilica with a reagent-less sensor dependent on ligand-binding and conformational change to drive FRET-based signaling capabilities. A fusion protein designed to confer such properties included a bacterial periplasmic ribose binding protein (R) flanked by CyPet (C) and YPet (Y), cyan and yellow fluorescent proteins that act as a FRET pair. The structure and function of the CRY recombinant chimeric protein was confirmed by expression in E. coli prior to transformation of the diatom Thalassiosira pseudonana. Mass spectrometry of the recombinant CRY showed 97% identity with the deduced amino acid sequence. CRY with and without an N-terminal Sil3 tag for biosilica localization exhibited characteristic ribose-dependent changes in FRET, with similar dissociation constants of 123.3 µM and 142.8 µM, respectively. The addition of the Sil3 tag did not alter the affinity of CRY for the ribose substrate. Subsequent transformation of T. pseudonana with a vector encoding Sil3-CRY resulted in fluorescence localization in the biosilica and changes in FRET in both living cells and isolated frustules in response to ribose. This work demonstrated that the nano-architecture of the genetically modified biosilica cell wall was able to support the functionality of the relatively complex Sil3-CyPet-RBP-YPet fusion protein with its requirement for ligand-binding and conformational change for FRET-signal generation.
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Affiliation(s)
- Kathryn E. Marshall
- Marine Biotechnology, Marine Sciences Laboratory, Pacific Northwest National Laboratory, Sequim, Washington, United States of America
| | - Errol W. Robinson
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, United States of America
| | - Shawna M. Hengel
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, United States of America
| | - Ljiljana Paša-Tolić
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington, United States of America
| | - Guritno Roesijadi
- Marine Biotechnology, Marine Sciences Laboratory, Pacific Northwest National Laboratory, Sequim, Washington, United States of America
- * E-mail:
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Zhu Y, Jiang Z, Zhang L, Shi J, Yang D. Sol–Gel Derived Boehmite as an Efficient and Robust Carrier for Enzyme Encapsulation. Ind Eng Chem Res 2011. [DOI: 10.1021/ie2015069] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Yuanyuan Zhu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Zhongyi Jiang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Lei Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Jiafu Shi
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Dong Yang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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Wang Q, Zhou L, Jiang Y, Gao J. Improved stability of the carbon nanotubes–enzyme bioconjugates by biomimetic silicification. Enzyme Microb Technol 2011; 49:11-6. [DOI: 10.1016/j.enzmictec.2011.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 04/07/2011] [Accepted: 04/09/2011] [Indexed: 10/18/2022]
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Shi J, Zhang L, Jiang Z. Facile construction of multicompartment multienzyme system through layer-by-layer self-assembly and biomimetic mineralization. ACS APPLIED MATERIALS & INTERFACES 2011; 3:881-889. [PMID: 21348442 DOI: 10.1021/am101241u] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In nature, some organelles such as mitochondria and chloroplasts possess multicompartment structure, which render powerful and versatile performance in cascade conversion, selective separation, and energy transfer. In this study, mitochondria-inspired hybrid double membrane microcapsules (HDMMCs) were prepared through synergy between biomimetic mineralization and layer-by-layer (LbL) self-assembly using double templating strategy. The organic inner membrane was acquired via LbL self-assembly of oxidized alginate (o-alginate) and protamine on the CaCO(3) template, the silica template layer was then formed onto the inner membrane through biomimetic silicification using protamine as inducer and silicate as precursor, the organic-inorganic hybrid outer membrane was acquired via biomimetic mineralization of titanium precursor. After the CaCO(3) template and the silica template are removed subsequently, multicompartment microcapsules with microscale lumen and nanoscale intermembrane space were obtained. The double membrane structure of the HDMMCs was verified by high resolution scanning electron microscopy (HRSEM), and the superior mechanical stability of HDMMCs was demonstrated by osmotic pressure experiment and fluorescence microscopy. A multienzyme system was constructed by following this protocol: the first enzyme was encapsulated in the lumen of the HDMMCs, whereas the second enzyme was encapsulated in the intermembrane space. Compared to encapsulated multienzyme in single-compartment microcapsules (SCMCs) or in free form in aqueous solution, enzymatic activity, selectivity, and recycling stability of HDMMCs-enabled multienzyme system were significantly improved. Because of the inherent gentle and generic feature, the present study can be utilized to create a variety of compartment structures for the potential applications in chemical/biological catalysis and separation, drug/gene delivery systems, and biosensors.
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Affiliation(s)
- Jiafu Shi
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
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Zhang L, Shi J, Jiang Z, Jiang Y, Meng R, Zhu Y, Liang Y, Zheng Y. Facile preparation of robust microcapsules by manipulating metal-coordination interaction between biomineral layer and bioadhesive layer. ACS APPLIED MATERIALS & INTERFACES 2011; 3:597-605. [PMID: 21344913 DOI: 10.1021/am101184h] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A novel approach combining biomimetic mineralization and bioadhesion is proposed to prepare robust and versatile organic-inorganic hybrid microcapsules. More specifically, these microcapsules are fabricated by sequential deposition of inorganic layer and organic layer on the surface of CaCO(3) microparticles, followed by the dissolution of CaCO(3) microparticles using EDTA. During the preparation process, protamine induces the hydrolysis and condensation of titania or silica precursor to form the inorganic layer or the biomineral layer. The organic layer or bioadhesive layer was formed through the rapid, spontaneous oxidative polymerization of dopamine into polydopamine (PDA) on the surface of the biomineral layer. There exist multiple interactions between the inorganic layer and the organic layer. Thus, the as-prepared organic-inorganic hybrid microcapsules acquire much higher mechanical stability and surface reactivity than pure titania or pure silica microcapsules. Furthermore, protamine/titania/polydopamine hybrid microcapsules display superior mechanical stability to protamine/silica/polydopamine hybrid microcapsules because of the formation of Ti(IV)-catechol coordination complex between the biomineral layer and the bioadhesive layer. As an example of application, three enzymes are respectively immobilized through physical encapsulation in the lumen, in situ entrapment within the wall and chemical attachment on the out surface of the hybrid microcapsules. The as-constructed multienzyme system displays higher catalytic activity and operational stability. Hopefully, the approach developed in this study will evolve as a generic platform for facile and controllable preparation of organic-inorganic hybrid materials with different compositions and shapes for a variety of applications in catalysis, sensor, drug/gene delivery.
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Affiliation(s)
- Lei Zhang
- Key Laboratory for Green Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
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