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Qiu Y, Lin Y, Zeng B, Qin P, Yi Z, Zhang G. Revealing the role of tunable amino acid residues in elastin-like polypeptides (ELPs)-mediated biomimetic silicification. Int J Biol Macromol 2023; 227:105-112. [PMID: 36539170 DOI: 10.1016/j.ijbiomac.2022.12.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022]
Abstract
Elastin-like polypeptides (ELPs) are attractive materials for the green preparation of silica nanoparticles via biomimetic silicification. However, the critical factors affecting the ELP-mediated silicification remain unclear. Herein, the role of tunable amino acid residues of ELPs in silicification was studied using three ELPs (ELPs[V9F-40], ELPs[KV8F-40], and ELPs[K5V4F-40]) and their fusion proteins (ELPs[V9F-40]-SpyCatcher, ELPs[KV8F-40]-SpyCatcher, and ELPs[K5V4F-40]-SpyCatcher) with different contents of lysine residues. Bioinformatics methods were employed for the first time to reveal the key physicochemical parameters correlated with silicification. The specific activity of ELPs was increased with the promotion of lysine content with a high correlation coefficient (R = 0.899). Furthermore, exogenous acidic protein SpyCatcher would hinder the interactions between the silica precursors and ELPs, leading to the significantly decrease in specific activity. The isoelectric point (pI) of ELPs presented the highest correlation to silicification with a coefficient of 0.963. The charges of the ELPs [K5V4F-40] at different pH were calculated based on the sequence or structure. Interestingly, the excellent correlation between charges based on structure and specific activity was obtained. Collectively, the novel methods developed here may pave a new way for rational design of ELPs or other peptides for efficient and green preparation of silica nanomaterials for biomedicine, biocatalysis, and biosensor.
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Affiliation(s)
- Yue Qiu
- Faculty of Food Science and Technology, Suzhou Polytechnic Institute of Agriculture, Suzhou 215008, Jiangsu, China; Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian, China
| | - Yuanqing Lin
- College of Environment and Public Health, Xiamen Huaxia University, Xiamen 361024, Fujian, China.
| | - Bo Zeng
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian, China; National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Peiliang Qin
- Department of Science and Technology Industry Division, Suzhou Polytechnical Institute of Agriculture, Suzhou, Jiangsu 215008, China
| | - Zhiwei Yi
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian, China; Technology Innovation Center for Exploitation of Marine Biological Resources, Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
| | - Guangya Zhang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen 361021, Fujian, China.
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Ciou HY, Chen XH, Chung FY, Tang CC, Jan JS. Effect of β-motif, chain length and topology on polypeptide-templated mesoporous silicas through biomimetic mineralization. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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He P, Yang G, Zhu D, Kong H, Corrales-Ureña YR, Colombi Ciacchi L, Wei G. Biomolecule-mimetic nanomaterials for photothermal and photodynamic therapy of cancers: Bridging nanobiotechnology and biomedicine. J Nanobiotechnology 2022; 20:483. [PMID: 36384717 PMCID: PMC9670580 DOI: 10.1186/s12951-022-01691-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 10/27/2022] [Indexed: 11/17/2022] Open
Abstract
Nanomaterial-based phototherapy has become an important research direction for cancer therapy, but it still to face some obstacles, such as the toxic side effects and low target specificity. The biomimetic synthesis of nanomaterials using biomolecules is a potential strategy to improve photothermal therapy (PTT) and photodynamic therapy (PDT) techniques due to their endowed biocompatibility, degradability, low toxicity, and specific targeting. This review presents recent advances in the biomolecule-mimetic synthesis of functional nanomaterials for PTT and PDT of cancers. First, we introduce four biomimetic synthesis methods via some case studies and discuss the advantages of each method. Then, we introduce the synthesis of nanomaterials using some biomolecules such as DNA, RNA, protein, peptide, polydopamine, and others, and discuss in detail how to regulate the structure and functions of the obtained biomimetic nanomaterials. Finally, potential applications of biomimetic nanomaterials for both PTT and PDT of cancers are demonstrated and discussed. We believe that this work is valuable for readers to understand the mechanisms of biomimetic synthesis and nanomaterial-based phototherapy techniques, and will contribute to bridging nanotechnology and biomedicine to realize novel highly effective cancer therapies.
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Affiliation(s)
- Peng He
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, People's Republic of China
| | - Guozheng Yang
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, People's Republic of China
| | - Danzhu Zhu
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, People's Republic of China
| | - Hao Kong
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, People's Republic of China
| | - Yendry Regina Corrales-Ureña
- Hybrid Materials Interfaces Group, Faculty of Production Engineering, University of Bremen, 28359, Bremen, Germany.
| | - Lucio Colombi Ciacchi
- Hybrid Materials Interfaces Group, Faculty of Production Engineering, University of Bremen, 28359, Bremen, Germany
| | - Gang Wei
- College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, People's Republic of China.
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4
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Chan NJ, Lentz S, Gurr PA, Scheibel T, Qiao GG. Mimicry of silk utilizing synthetic polypeptides. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Sun X, Yu X, Cheng F, He W. Cationic polymeric template-mediated preparation of silica nanocomposites. SOFT MATTER 2021; 17:8995-9007. [PMID: 34611687 DOI: 10.1039/d1sm00773d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Biosilicification allows the formation of complex and delicate biogenic silica in near-neutral solutions under ambient conditions. Studies have revealed that, during biosilicification, basic amino acid residues and long-chain polyamines of organic substrates interact electrostatically with negatively charged silicate precursors in solution, catalyzing the polycondensation of silicic acid and accelerating the formation of silica. This mechanism has inspired researchers to explore polymers bearing chemical similarity with these organic matrices as cationic templates for biomimetic silicification. Such templates can be classified into two general categories based on the physical forms applied. One is a solution of water-soluble cationic polymers, either natural or synthetic, used as is for silicification. The other category includes various microscopically shaped entities made of cationic polymer-containing molecules, in the form of micelles, vesicles, crystalline aggregates, latex particles, and microgels. Combined with controlled polymerization and other techniques, these preorganized templates can be tailor designed in terms of sizes and morphologies to allow further expansion of properties and functions. In this review, notable research progress for both categories of silicification under biomimetic conditions is discussed. With the merits of silica and cationic polymers seamlessly integrated, the potential of such versatile nanocomposites in biomedical as well as energy and environmental applications is also briefly highlighted.
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Affiliation(s)
- Xiaoning Sun
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, 116023, China.
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, 116023, China
| | - Xueying Yu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, 116023, China.
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, 116023, China
| | - Fang Cheng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, 116023, China.
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, 116023, China
| | - Wei He
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, Liaoning, 116023, China.
- School of Chemical Engineering, Dalian University of Technology, Dalian, Liaoning, 116023, China
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Min Y, Xu W, Xiao Y, Xiao J, Shu Z, Li S, Zhang J, Liu Y, Yin Y, Zhang X, Meng J. Biomineralization improves the stability of a Streptococcus pneumoniae protein vaccine at high temperatures. Nanomedicine (Lond) 2021; 16:1747-1761. [PMID: 34264093 DOI: 10.2217/nnm-2021-0023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Aim: Protein vaccines have been the focus of research for vaccine development due to their safety record and facile production. Improving the stability of proteins is of great significance to the application of protein vaccines. Materials & methods: Based on the proteins pneumolysin and DnaJ of Streptococcus pneumoniae, biomineralization was carried out to prepare protein nanoparticles, and their thermal stability was tested both in vivo and in vitro. Results: Mineralized nanoparticles were formed successfully and these calcium phosphate-encapsulated proteins were resistant to proteinase K degradation and were thermally stable at high temperatures. The mineralized proteins retained the immunoreactivity of the original proteins. Conclusion: Mineralization technology is an effective means to stabilize protein vaccines, presenting a safe and economical method for vaccine administration.
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Affiliation(s)
- Yajun Min
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China.,Department of Obstetrics & Gynecology, Assisted Reproductive Center, The First Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
| | - Wenchun Xu
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Yunju Xiao
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Jiangming Xiao
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Zhaoche Shu
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Sijie Li
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Jinghui Zhang
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Yusi Liu
- Department of Laboratory Medicine, The First Affiliated Hospital of China Medical University, Shenyang, PR China
| | - Yibing Yin
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Xuemei Zhang
- Department of Laboratory Medicine, Key Laboratory of Diagnostic Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, PR China
| | - Jiangping Meng
- Department of Nuclear Medicine, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, PR China
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Can sustainable, monodisperse, spherical silica be produced from biomolecules? A review. APPLIED NANOSCIENCE 2021. [DOI: 10.1007/s13204-021-01869-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Biomineralization of mesoporous silica and metal nanoparticle/mesoporous silica nanohybrids by chemo-enzymatically prepared peptides. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Yang J, Hu D, Li W, Jia Y, Li P. Formation mechanism of zigzag patterned P(NIPAM- co-AA)/CuS composite microspheres by in situ biomimetic mineralization for morphology modulation. RSC Adv 2021; 11:37904-37916. [PMID: 35498057 PMCID: PMC9043918 DOI: 10.1039/d1ra04872d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 10/27/2021] [Indexed: 11/30/2022] Open
Abstract
Poly(N-isopropylacrylamide-co-acrylic acid)/copper sulfide (P(NIPAM-co-AA)/CuS) composite microspheres with variable zigzag patterned surfaces have been synthesized by employing an in situ biomimetic mineralization reaction between H2S and Cu2+ immersed in P(NIPAM-co-AA) microspheres for morphology modulation. The morphology and composition of the P(NIPAM-co-AA)/CuS composite microspheres with zigzag patterned surfaces prepared in different conditions were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectrometry (FT-IR). The polymeric microgels swelled by Cu(Ac)2 solution after freeze-drying treatment were of porous structure, indicating that there were polymeric frameworks and rich-water domains in the microgels before the deposition. Furthermore, due to the limited uneven deposition of metal sulfide on the polymeric skeleton of the hydrogel surface, the surface polymeric skeleton will be anisotropically shrunk when the composite microspheres lose water and shrink, thus forming a wrinkle pattern on the surface of the composite microspheres. The factors affecting the deposition amount and distribution of metal sulfide will affect the zigzag patterned morphology. Based on the experimental results, a formation mechanism of the P(NIPAM-co-AA)/CuS composite microspheres with zigzag patterned surface, “the deformed shrinkage of the surface texture”, has been proposed. The formation mechanism of the surface morphology in the composite microspheres is helpful for understanding and controlling the process of mineralization, for preparing materials expected by controlling the experiment conditions, and for expanding the application of the composites. P(NIPAM-co-AA)/CuS composite microspheres with zigzag patterned surfaces were synthesized, and a mechanism for “the deformed shrinkage of the surface texture” was proposed. The surface morphology is sensitive to factors such as Ksp, pH, temperature, deposition amount, etc.![]()
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Affiliation(s)
- Juxiang Yang
- School of Chemistry and Chemical Engineering, Xi'an University, Xi'an 710065, P. R. China
| | - Daodao Hu
- School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, P. R. China
| | - Wei Li
- School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710062, P. R. China
| | - Yuan Jia
- School of Chemistry and Chemical Engineering, Xi'an University, Xi'an 710065, P. R. China
| | - Pengna Li
- School of Chemistry and Chemical Engineering, Xi'an University, Xi'an 710065, P. R. China
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10
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Chen YF, Chang CH, Hsu MW, Chang HM, Chen YC, Jiang YS, Jan JS. Peptide Fibrillar Assemblies Exhibit Membranolytic Effects and Antimetastatic Activity on Lung Cancer Cells. Biomacromolecules 2020; 21:3836-3846. [PMID: 32790281 DOI: 10.1021/acs.biomac.0c00911] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cancer metastasis is a central oncology concern that worsens patient conditions and increases mortality in a short period of time. During metastatic events, mitochondria undergo specific physiological alterations that have emerged as notable therapeutic targets to counter cancer progression. In this study, we use drug-free, cationic peptide fibrillar assemblies (PFAs) formed by poly(L-Lysine)-block-poly(L-Threonine) (Lys-b-Thr) to target mitochondria. These PFAs interact with cellular and mitochondrial membranes via electrostatic interactions, resulting in membranolysis. Charge repulsion and hydrogen-bonding interactions exerted by Lys and Thr segments dictate the packing of the peptides and enable the PFAs to display enhanced membranolytic activity toward cancer cells. Cytochrome c (cyt c), endonuclease G, and apoptosis-inducing factor were released from mitochondria after treatment of lung cancer cells, subsequently inducing caspase-dependent and caspase-independent apoptotic pathways. A metastatic xenograft mouse model was used to show how the PFAs significantly suppressed lung metastasis and inhibited tumor growth, while avoiding significant body weight loss and mortality. Antimetastatic activities of PFAs are also demonstrated by in vitro inhibition of lung cancer cell migration and clonogenesis. Our results imply that the cationic PFAs achieved the intended and targeted mitochondrial damage, providing an efficient antimetastatic therapy.
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Affiliation(s)
- Yu-Fon Chen
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101 Taiwan
| | - Chien-Hsiang Chang
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101 Taiwan
| | - Ming-Wei Hsu
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101 Taiwan
| | - Ho-Min Chang
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101 Taiwan
| | - Yi-Cheng Chen
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101 Taiwan
| | - Yi-Sheng Jiang
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101 Taiwan
| | - Jeng-Shiung Jan
- Department of Chemical Engineering, National Cheng Kung University, No. 1 University Road, Tainan 70101 Taiwan
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11
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Catalase immobilized in polypeptide/silica nanocomposites via emulsion and biomineralization with improved activities. Int J Biol Macromol 2020; 159:931-940. [DOI: 10.1016/j.ijbiomac.2020.05.138] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/12/2020] [Accepted: 05/17/2020] [Indexed: 12/17/2022]
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12
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Modification of Mesoporous Silica Surface by Immobilization of Functional Groups for Controlled Drug Release. J CHEM-NY 2020. [DOI: 10.1155/2020/9176257] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
This paper introduces the synthesis of mesoporous silica nanoparticles (MSNs) with three different groups such as amine, thiol, and sulfonic acid, along the internal surface. Trimethyl[3-(trimethoxysilyl)propyl]ammonium chloride was used to modify the external surface of the nanomaterials. Such materials allow control of the drug release from MSN pores. Multifunctional MSNs were loaded with doxycycline (Doxy) to study their capacities and uploading time. The loading profile indicates that sulfonic groups in the internal surface were the most efficient surfaces with a loading capacity of ca. 35% in 90 min in acidic media.
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13
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Injectable pH-responsive poly (γ-glutamic acid)-silica hybrid hydrogels with high mechanical strength, conductivity and cytocompatibility for biomedical applications. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122489] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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14
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Madhumitha D, Vaidyanathan V, Dhathathreyan A. Plasticity or elasticity? Relating elastic moduli with secondary structural features of mixed films of polypeptides at air/fluid and fluid/solid interfaces. Biophys Chem 2020; 258:106329. [DOI: 10.1016/j.bpc.2020.106329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 01/08/2020] [Accepted: 01/10/2020] [Indexed: 12/11/2022]
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15
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Alswieleh AM, Beagan AM, Alsheheri BM, Alotaibi KM, Alharthi MD, Almeataq MS. Hybrid Mesoporous Silica Nanoparticles Grafted with 2-(tert-butylamino)ethyl Methacrylate-b-poly(ethylene Glycol) Methyl Ether Methacrylate Diblock Brushes as Drug Nanocarrier. Molecules 2020; 25:E195. [PMID: 31947738 PMCID: PMC6983194 DOI: 10.3390/molecules25010195] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/29/2019] [Accepted: 12/30/2019] [Indexed: 01/10/2023] Open
Abstract
This paper introduces the synthesis of well-defined 2-(tert-butylamino)ethyl methacrylate-b-poly(ethylene glycol) methyl ether methacrylate diblock copolymer, which has been grafted onto mesoporous silica nanoparticles (PTBAEMA-b-PEGMEMA-MSNs) via atom transfer radical polymerization (ATRP). The ATRP initiators were first attached to the MSN surfaces, followed by the ATRP of 2-(tert-butylamino)ethyl methacrylate (PTBAEMA). CuBr2/bipy and ascorbic acid were employed as the catalyst and reducing agent, respectively, to grow a second polymer, poly(ethylene glycol) methyl ether methacrylate (PEGMEMA). The surface structures of these fabricated nanomaterials were then analyzed using Fourier Transform Infrared (FTIR) spectroscopy. The results of Thermogravimetric Analysis (TGA) show that ATRP could provide a high surface grafting density for polymers. Dynamic Light Scattering (DLS) was conducted to investigate the pH-responsive behavior of the diblock copolymer chains on the nanoparticle surface. In addition, multifunctional pH-sensitive PTBAEMA-b-PEGMEMA-MSNs were loaded with doxycycline (Doxy) to study their capacities and long-circulation time.
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Affiliation(s)
- Abdullah M Alswieleh
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia (B.M.A.); (K.M.A.); (M.D.A.)
| | - Abeer M Beagan
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia (B.M.A.); (K.M.A.); (M.D.A.)
| | - Bayan M Alsheheri
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia (B.M.A.); (K.M.A.); (M.D.A.)
| | - Khalid M Alotaibi
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia (B.M.A.); (K.M.A.); (M.D.A.)
| | - Mansour D Alharthi
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia (B.M.A.); (K.M.A.); (M.D.A.)
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16
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Alswieleh AM, Alshahrani MM, Alzahrani KE, Alghamdi HS, Niazy AA, Alsilme AS, Beagan AM, Alsheheri BM, Alghamdi AA, Almeataq MS. Surface modification of pH-responsive poly(2-(tert-butylamino)ethyl methacrylate) brushes grafted on mesoporous silica nanoparticles. Des Monomers Polym 2019; 22:226-235. [PMID: 31853240 PMCID: PMC6913628 DOI: 10.1080/15685551.2019.1699727] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 11/26/2019] [Indexed: 11/18/2022] Open
Abstract
Poly(2‑(tert-butylamino)ethyl methacrylate) brushes (PTBAEMA) are grown from mesoporous silica nanoparticles via surface-initiated atom transfer radical polymerization (SI-ATRP). Linear PTBAEMA brushes are protonated and highly swollen at low pH; brushes are collapsed at pH higher than 7.7 due to deprotonation, as determined by dynamic light scattering (DLS). Quaternization of these brushes is conducted using 2-iodoethanol in alkali media. DLS measurement of nanoparticles shows that surface-confined quaternization occurs and produces pH-responsive brushes with a hydrophobic upper surface. Variation of the 2-iodoethanol reaction time enables the mean degree of surface quaternization. The pH-responsive behaviour of quaternized PTBEAMA brushes at 1 h reaction time indicates low degrees of surface quaternization, dictated by the spatial location of 2-iodoethanol. Almost uniformly quaternized brushes prepared when the conducted for 3 h and became less swollen at low pH than brushes that conducted for 1 h. The intensity of the C - C - O component (286.5 eV) in the C1s X-ray photoelectron spectrum increased, suggesting that the reaction with iodoethanol was successful occurred.
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Affiliation(s)
- Abdullah M. Alswieleh
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Mufleh M. Alshahrani
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Khalid E. Alzahrani
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
- King Abdullah Institute for Nanotechnology, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Hamdan S. Alghamdi
- Prince Naif Health Research Center, Molecular and Cell Biology Laboratory, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Abdurahman A Niazy
- Prince Naif Health Research Center, Molecular and Cell Biology Laboratory, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia
- Department of Oral Medicine and Diagnostic Sciences, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Abdulilah S Alsilme
- King Abdulaziz City for Science and Technology, Riyadh, Kingdom of Saudi Arabia
| | - Abeer M. Beagan
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Bayan M. Alsheheri
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
| | - Abdulaziz A. Alghamdi
- Department of Chemistry, College of Science, King Saud University, Riyadh, Kingdom of Saudi Arabia
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Turksen-Selcuk S, Rosu C, Blake A, Soto-Cantu E, Qiu J, Wu Y, DiTusa JF, Steffens A, Russo PS. Organophilic, Superparamagnetic, and Reversibly Thermoresponsive Silica-Polypeptide Core-Shell Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14248-14257. [PMID: 31644297 DOI: 10.1021/acs.langmuir.9b01931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Particles with a superparamagnetic cobalt inner core, silica outer core, and covalently bound homopolypeptide shell were investigated under thermal and magnetic stimuli. The homopolypeptide was poly(ε-carbobenzyloxy-l-lysine), PCBL, which is known to exhibit a thermoreversible coil ⇔ helix transition when dissolved as a pure polymer in m-cresol. Tethering to a core particle did not prevent PCBL from undergoing this conformational transition, as confirmed by dynamic light scattering and optical rotation, but the transition was broadened compared to that of the untethered polymer. The Co@SiO2-PCBL hybrid particles retained the superparamagnetic properties of the cobalt inner nougat. Indeed, some response remains even after aging for >5 years. The aged PCBL shell also preserved its responsiveness to temperature, although differences in the shape of the size vs temperature transition curve were observed compared to the freshly made particles. A reversible coil ⇔ helix transition for a particle-bound polypeptide in a pure organic solvent is rare. In addition to providing a convenient tool for characterizing coil ⇔ helix transitions for surface-bound polypeptides without interference from pH or the strong ionic forces that dominate behavior in aqueous systems, the Co@SiO2-PCBL/m-cresol system may prove useful in studies of the effect of shell polymer conformation on colloid interactions. The stability of the magnetic core and polypeptide shell suggest a long shelf life for Co@SiO2-PCBL, which can, in principle, be deprotected to yield positively charged Co@SiO2-poly(l-lysine) particles for possible transfection or antimicrobial applications or chained magnetically to produce responsive poly(colloids).
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Prosposito P, Burratti L, Bellingeri A, Protano G, Faleri C, Corsi I, Battocchio C, Iucci G, Tortora L, Secchi V, Franchi S, Venditti I. Bifunctionalized Silver Nanoparticles as Hg 2+ Plasmonic Sensor in Water: Synthesis, Characterizations, and Ecosafety. NANOMATERIALS 2019; 9:nano9101353. [PMID: 31547209 PMCID: PMC6835846 DOI: 10.3390/nano9101353] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 09/13/2019] [Accepted: 09/16/2019] [Indexed: 12/22/2022]
Abstract
In this work, hydrophilic silver nanoparticles (AgNPs), bifunctionalized with citrate (Cit) and L-cysteine (L-cys), were synthesized. The typical local surface plasmon resonance (LSPR) at λ max = 400 nm together with Dynamic Light Scattering (DLS) measurements (<2RH> = 8 ± 1 nm) and TEM studies (Ø = 5 ± 2 nm) confirmed the system nanodimension and the stability in water. Molecular and electronic structures of AgNPs were investigated by FTIR, SR-XPS, and NEXAFS techniques. We tested the system as plasmonic sensor in water with 16 different metal ions, finding sensitivity to Hg2+ in the range 1–10 ppm. After this first screening, the molecular and electronic structure of the AgNPs-Hg2+ conjugated system was deeply investigated by SR-XPS. Moreover, in view of AgNPs application as sensors in real water systems, environmental safety assessment (ecosafety) was performed by using standardized ecotoxicity bioassay as algal growth inhibition tests (OECD 201, ISO 10253:2006), coupled with determination of Ag+ release from the nanoparticles in fresh and marine aqueous exposure media, by means of ICP-MS. These latest studies confirmed low toxicity and low Ag+ release. Therefore, these ecosafe AgNPs demonstrate a great potential in selective detection of environmental Hg2+, which may attract a great interest for several biological research fields.
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Affiliation(s)
- Paolo Prosposito
- Department of Industrial Engineering and INSTM, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy.
- Center for Regenerative Medicine, University of Rome Tor Vergata, Via Montpellier 1, 00133 Rome, Italy.
| | - Luca Burratti
- Department of Industrial Engineering and INSTM, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy.
| | - Arianna Bellingeri
- Department of Physical, Earth and Environmental Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy.
| | - Giuseppe Protano
- Department of Physical, Earth and Environmental Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy.
| | - Claudia Faleri
- Department of Life Sciences, via Mattioli 4, 53100 Siena, Italy.
| | - Ilaria Corsi
- Department of Physical, Earth and Environmental Sciences, University of Siena, Via Mattioli 4, 53100 Siena, Italy.
| | - Chiara Battocchio
- Department of Sciences, Roma Tre University of Rome, Via della Vasca Navale 79, 00146 Rome, Italy.
| | - Giovanna Iucci
- Department of Sciences, Roma Tre University of Rome, Via della Vasca Navale 79, 00146 Rome, Italy.
| | - Luca Tortora
- Department of Sciences, Roma Tre University of Rome, Via della Vasca Navale 79, 00146 Rome, Italy.
- Surface Analysis Laboratory INFN Roma Tre, via della Vasca Navale 84, 00146 Rome, Italy.
| | - Valeria Secchi
- Department of Sciences, Roma Tre University of Rome, Via della Vasca Navale 79, 00146 Rome, Italy.
| | - Stefano Franchi
- Elettra-Sincrotrone Trieste S.c.p.A., Strada Statale 14, km 163.5, 34149 Basovizza Trieste, Italy.
| | - Iole Venditti
- Department of Sciences, Roma Tre University of Rome, Via della Vasca Navale 79, 00146 Rome, Italy.
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