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Katagiri N, Shimokawa D, Suzuki T, Kousai M, Iritani E. Separation Properties of Plasmid DNA Using a Two-Stage Particle Adsorption-Microfiltration Process. MEMBRANES 2023; 13:168. [PMID: 36837671 PMCID: PMC9960540 DOI: 10.3390/membranes13020168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/27/2023] [Accepted: 01/27/2023] [Indexed: 06/18/2023]
Abstract
Plasmid DNA is used as a vector for gene therapy and DNA vaccination; therefore, the establishment of a mass production method is required. Membrane filtration is widely employed as a separation method suitable for the mass production of plasmid DNA. Furthermore, the separation of plasmid DNA using microfiltration and ultrafiltration membranes is being investigated. Because plasmid DNA has a circular structure, it undergoes significant deformation during filtration and easily permeates the membrane, hindering the selection of separation membranes based on molecular weight. In this study, we applied affinity microfiltration to plasmid DNA purification. α-Fe2O3 with an isoelectric point of approximately 8 and a particle size of 0.5 μm was selected as the ligand for two-stage affinity microfiltration of plasmid DNA. In the first stage of microfiltration, the experiment was conducted at a pH of 5, and a cake of α-Fe2O3 with bound plasmid DNA was obtained. Next, liquid permeation (pH 9 and 10) through the cake was performed to elute the bound plasmid DNA. Plasmid DNA was eluted during the early phase of liquid permeation at pH 10. Furthermore, agarose gel analysis confirmed the usefulness of the two-stage affinity microfiltration method with adsorption and desorption for plasmid DNA purification.
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Affiliation(s)
- Nobuyuki Katagiri
- Department of Environmental Technology, Meijo University, 1-501 Shiogamaguchi, Tempaku-ku, Nagoya 468-8502, Japan
| | - Daisuke Shimokawa
- Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Takayuki Suzuki
- Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Masahito Kousai
- Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Eiji Iritani
- Department of Chemical Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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Wu C, Zhang Y, Li F, Bei S, Pan M, Feng L. Precise engineering of cholesterol-loaded chitosan micelles as a promising nanocarrier system for co-delivery drug-siRNA for the treatment of gastric cancer therapy. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.05.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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Tracking Bacterial Nanocellulose in Animal Tissues by Fluorescence Microscopy. NANOMATERIALS 2022; 12:nano12152605. [PMID: 35957036 PMCID: PMC9370207 DOI: 10.3390/nano12152605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/26/2022] [Accepted: 07/26/2022] [Indexed: 02/07/2023]
Abstract
The potential of nanomaterials in food technology is nowadays well-established. However, their commercial use requires a careful risk assessment, in particular concerning the fate of nanomaterials in the human body. Bacterial nanocellulose (BNC), a nanofibrillar polysaccharide, has been used as a food product for many years in Asia. However, given its nano-character, several toxicological studies must be performed, according to the European Food Safety Agency’s guidance. Those should especially answer the question of whether nanoparticulate cellulose is absorbed in the gastrointestinal tract. This raises the need to develop a screening technique capable of detecting isolated nanosized particles in biological tissues. Herein, the potential of a cellulose-binding module fused to a green fluorescent protein (GFP–CBM) to detect single bacterial cellulose nanocrystals (BCNC) obtained by acid hydrolysis was assessed. Adsorption studies were performed to characterize the interaction of GFP–CBM with BNC and BCNC. Correlative electron light microscopy was used to demonstrate that isolated BCNC may be detected by fluorescence microscopy. The uptake of BCNC by macrophages was also assessed. Finally, an exploratory 21-day repeated-dose study was performed, wherein Wistar rats were fed daily with BNC. The presence of BNC or BCNC throughout the GIT was observed only in the intestinal lumen, suggesting that cellulose particles were not absorbed. While a more comprehensive toxicological study is necessary, these results strengthen the idea that BNC can be considered a safe food additive.
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Djebbi K, Shi B, Weng T, Bahri M, Elaguech MA, Liu J, Tlili C, Wang D. Highly Sensitive Fluorescence Assay for miRNA Detection: Investigation of the DNA Spacer Effect on the DSN Enzyme Activity toward Magnetic-Bead-Tethered Probes. ACS OMEGA 2022; 7:2224-2233. [PMID: 35071911 PMCID: PMC8771974 DOI: 10.1021/acsomega.1c05775] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/29/2021] [Indexed: 05/28/2023]
Abstract
Researchers have recently designed various biosensors combining magnetic beads (MBs) and duplex-specific nuclease (DSN) enzyme to detect miRNAs. Yet, the interfacial mechanisms for surface-based hybridization and DSN-assisted target recycling are relatively not well understood. Thus, herein, we developed a highly sensitive and selective fluorescent biosensor to study the phenomenon that occurs on the local microenvironment surrounding the MB-tethered DNA probe via detecting microRNA-21 as a model. Using the above strategy, we investigated the influence of different DNA spacers, base-pair orientations, and surface densities on DSN-assisted target recycling. As a result, we were able to detect as low as 170 aM of miR-21 under the optimized conditions. Moreover, this approach exhibits a high selectivity in a fully matched target compared to a single-base mismatch, allowing the detection of miRNAs in serum with improved recovery. These results are attributed to the synergetic effect between the DSN enzyme activity and the neutral DNA spacer (triethylene glycol: TEG) to improve the miRNA detection's sensitivity. Finally, our strategy could create new paths for detecting microRNAs since it obliterates the enzyme-mediated cascade reaction used in previous studies, which is more expensive, more time-consuming, less sensitive, and requires double catalytic reactions.
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Affiliation(s)
- Khouloud Djebbi
- Chongqing
Institute of Green and Intelligent Technology, Chinese Academy of
Sciences, Chongqing 400714, P. R. China
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
- University
of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
| | - Biao Shi
- Chongqing
Institute of Green and Intelligent Technology, Chinese Academy of
Sciences, Chongqing 400714, P. R. China
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
| | - Ting Weng
- Chongqing
Institute of Green and Intelligent Technology, Chinese Academy of
Sciences, Chongqing 400714, P. R. China
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
| | - Mohamed Bahri
- Chongqing
Institute of Green and Intelligent Technology, Chinese Academy of
Sciences, Chongqing 400714, P. R. China
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
- University
of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
| | - Mohamed Amin Elaguech
- Chongqing
Institute of Green and Intelligent Technology, Chinese Academy of
Sciences, Chongqing 400714, P. R. China
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
- University
of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
| | - Jin Liu
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
- Department
of Pathology, Chongqing General Hospital, University of Chinese Academy of Sciences (UCAS), Chongqing 400013, P. R. China
| | - Chaker Tlili
- Chongqing
Institute of Green and Intelligent Technology, Chinese Academy of
Sciences, Chongqing 400714, P. R. China
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
| | - Deqiang Wang
- Chongqing
Institute of Green and Intelligent Technology, Chinese Academy of
Sciences, Chongqing 400714, P. R. China
- Chongqing
School, University of Chinese Academy of
Sciences (UCAS), Chongqing 400714, P. R. China
- University
of Chinese Academy of Sciences (UCAS), Beijing 100049, P. R. China
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Synergic fabrication of combination therapy of Irinotecan and 5-Fluorouracil encapsulated polymeric nanoparticles for the treatment of gastric cancer therapy. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.04.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Majtnerova P, Capek J, Petira F, Handl J, Rousar T. Quantitative spectrofluorometric assay detecting nuclear condensation and fragmentation in intact cells. Sci Rep 2021; 11:11921. [PMID: 34099803 PMCID: PMC8184882 DOI: 10.1038/s41598-021-91380-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 05/21/2021] [Indexed: 12/17/2022] Open
Abstract
At present, nuclear condensation and fragmentation have been estimated also using Hoechst probes in fluorescence microscopy and flow cytometry. However, none of the methods used the Hoechst probes for quantitative spectrofluorometric assessment. Therefore, the aim of the present study was to develop a spectrofluorometric assay for detection of nuclear condensation and fragmentation in the intact cells. We used human hepatoma HepG2 and renal HK-2 cells cultured in 96-well plates treated with potent apoptotic inducers (i.e. cisplatin, staurosporine, camptothecin) for 6-48 h. Afterwards, the cells were incubated with Hoechst 33258 (2 µg/mL) and the increase of fluorescence after binding of the dye to DNA was measured. The developed spectrofluorometric assay was capable to detect nuclear changes caused by all tested apoptotic inducers. Then, we compared the outcomes of the spectrofluorometric assay with other methods detecting cell impairment and apoptosis (i.e. WST-1 and glutathione tests, TUNEL, DNA ladder, caspase activity, PARP-1 and JNKs expressions). We found that our developed spectrofluorometric assay provided results of the same sensitivity as the TUNEL assay but with the advantages of being fast processing, low-cost and a high throughput. Because nuclear condensation and fragmentation can be typical markers of cell death, especially in apoptosis, we suppose that the spectrofluorometric assay could become a routinely used method for characterizing cell death processes.
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Affiliation(s)
- Pavlina Majtnerova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Jan Capek
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Filip Petira
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Jiri Handl
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic
| | - Tomas Rousar
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice, Studentska 573, 532 10, Pardubice, Czech Republic.
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Han L, Tan J, Li J, Meng T, Wang Y, Wang S. Structurally improved reduced graphene oxide nanocluster structured assembly with Naringin for the effective photothermal therapy of colon tumour patients and nursing care management. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1736674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Liwei Han
- Department of Pain, Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Juan Tan
- Department of Pain, Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Jing Li
- Department of Pain, Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Tianyu Meng
- Department of Pain, Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Yuhang Wang
- Department of Pain, Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Sisi Wang
- Department of traditional Chinese medicine, Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
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Chen J, He GM, Xian GY, Su XQ, Yu LL, Yao F. Mechanistic biosynthesis of SN-38 coated reduced graphene oxide sheets for photothermal treatment and care of patients with gastric cancer. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2020; 204:111736. [DOI: 10.1016/j.jphotobiol.2019.111736] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 12/01/2019] [Accepted: 12/05/2019] [Indexed: 12/14/2022]
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