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Shepherd BA, Tanjil MRE, Jeong Y, Baloğlu B, Liao J, Wang MC. Ångström- and Nano-scale Pore-Based Nucleic Acid Sequencing of Current and Emergent Pathogens. ACTA ACUST UNITED AC 2020; 5:2889-2906. [PMID: 33437534 PMCID: PMC7790041 DOI: 10.1557/adv.2020.402] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
State-of-the-art nanopore sequencing enables rapid and real-time identification of novel pathogens, which has wide application in various research areas and is an emerging diagnostic tool for infectious diseases including COVID-19. Nanopore translocation enables de novo sequencing with long reads (> 10 kb) of novel genomes, which has advantages over existing short-read sequencing technologies. Biological nanopore sequencing has already achieved success as a technology platform but it is sensitive to empirical factors such as pH and temperature. Alternatively, ångström- and nano-scale solid-state nanopores, especially those based on two-dimensional (2D) membranes, are promising next-generation technologies as they can surpass biological nanopores in the variety of membrane materials, ease of defining pore morphology, higher nucleotide detection sensitivity, and facilitation of novel and hybrid sequencing modalities. Since the discovery of graphene, atomically-thin 2D materials have shown immense potential for the fabrication of nanopores with well-defined geometry, rendering them viable candidates for nanopore sequencing membranes. Here, we review recent progress and future development trends of 2D materials and their ångström- and nano-scale pore-based nucleic acid (NA) sequencing including fabrication techniques and current and emerging sequencing modalities. In addition, we discuss the current challenges of translocation-based nanopore sequencing and provide an outlook on promising future research directions.
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Affiliation(s)
- Britney A Shepherd
- Department of Medical Engineering, University of South Florida, 4202 E. Fowler Avenue, Tampa, Florida 33620 USA
| | - Md Rubayat-E Tanjil
- Department of Mechanical Engineering, University of South Florida, 4202 E. Fowler Avenue, Tampa, Florida 33620 USA
| | - Yunjo Jeong
- Department of Mechanical Engineering, University of South Florida, 4202 E. Fowler Avenue, Tampa, Florida 33620 USA
| | - Bilgenur Baloğlu
- Centre for Biodiversity Genomics, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G2W1 Canada
| | - Jingqiu Liao
- Department of Systems Biology, Columbia University, 1130 St. Nicholas Avenue, New York, New York 10032 USA
| | - Michael Cai Wang
- Department of Medical Engineering, University of South Florida, 4202 E. Fowler Avenue, Tampa, Florida 33620 USA.,Department of Mechanical Engineering, University of South Florida, 4202 E. Fowler Avenue, Tampa, Florida 33620 USA
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Pham B, Chisholm CM, Foster J, Friis E, Fahie MA, Chen M. A pH-independent quiet OmpG pore with enhanced electrostatic repulsion among the extracellular loops. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1863:183485. [PMID: 33058855 DOI: 10.1016/j.bbamem.2020.183485] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 09/22/2020] [Indexed: 11/16/2022]
Abstract
Membrane protein pores have emerged as powerful nanopore sensors for single-molecule detection. OmpG, a monomeric nanopore, is comprised of fourteen β-strands connected by seven flexible extracellular loops. The OmpG nanopore exhibits pH-dependent gating as revealed by planar lipid bilayer studies. Current evidence strongly suggests that the dynamic movement of loop 6 is responsible for the gating mechanism. In this work, we have shown that enhancing the electrostatic repulsion forces between extracellular loops suppressed the pH-dependent gating. Our mutant containing additional negative charges in loop 6 and loop 1 exhibited minimal spontaneous gating and reduced sensitivity to pH changes compared to the wild type OmpG. These results provide new evidence to support the mechanism of OmpG gating controlled by the complex electrostatic network around the gating loop 6. The pH-independent quiet OmpG pores could potentially be used as a sensing platform that operates at a broad range of pH conditions.
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Affiliation(s)
- Bach Pham
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, United States
| | - Christina M Chisholm
- Molecular and Cellular Biology Program, University of Massachusetts Amherst, Amherst, MA 01003, United States
| | - Joshua Foster
- Molecular and Cellular Biology Program, University of Massachusetts Amherst, Amherst, MA 01003, United States
| | - Emily Friis
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, United States
| | - Monifa A Fahie
- Molecular and Cellular Biology Program, University of Massachusetts Amherst, Amherst, MA 01003, United States
| | - Min Chen
- Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, United States; Molecular and Cellular Biology Program, University of Massachusetts Amherst, Amherst, MA 01003, United States.
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Cai B, Zou Q, Zuo Y, Mei Q, Ma J, Lin L, Chen L, Li Y. Injectable Gel Constructs with Regenerative and Anti-Infective Dual Effects Based on Assembled Chitosan Microspheres. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25099-25112. [PMID: 29952200 DOI: 10.1021/acsami.8b06648] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
There is increasing demand for biomaterials that both assist with bone regeneration and have anti-infection qualities in clinical applications. To achieve this goal, chitosan microspheres with either positive or negative charges were fabricated and then assembled as a gel for bone healing. The positively charged chitosan microspheres (CSM; ∼35.5 μm) and negatively charged O-carboxymethyl chitosan microspheres (CMCSM; ∼13.5 μm) were loaded, respectively, with bone morphogenetic protein (BMP-2) and berberine (Bbr) via swollen encapsulation and physical adsorption without a significant change in the electric charges. The release kinetics of BMP-2 and Bbr from the microspheres were also studied in vitro. The results showed that the Bbr/CMCSM microsphere group possessed high antibacterial activity against Staphylococcus aureus; the BMP-2/CSM microsphere group also had excellent cytocompatibility and improved osteoinductivity with the assistance of BMP-2. The assembled gel group consisting of Bbr/CMCSM and BMP-2/CSM had a porous structure that allowed biological signal transfer and tissue infiltration and exhibited significantly enhanced bone reconstruction compared with that of the respective microsphere groups, which should result from the osteoconductivity of the porous structure and the osteoinduction of the BMP-2 growth factor. The oppositely charged microspheres and their assembled gel provide a promising prospect for making injectable tissue-engineered constructs with regenerative and anti-infective dual effects for biomedical applications.
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Affiliation(s)
- Bin Cai
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Qin Zou
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Yi Zuo
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Quanjing Mei
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Jinqi Ma
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Lili Lin
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Li Chen
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
| | - Yubao Li
- Research Center for Nano-Biomaterial, Analytical & Testing Center , Sichuan University , Chengdu 610064 , China
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Zhang D, Bi H, Liu B, Qiao L. Detection of Pathogenic Microorganisms by Microfluidics Based Analytical Methods. Anal Chem 2018; 90:5512-5520. [PMID: 29595252 DOI: 10.1021/acs.analchem.8b00399] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Microfluidics based biochemical analysis shows distinctive advantages for fast detection of pathogenic microorganisms. This Feature summarizes the progress in the past decade on microfluidic methods for purification and detection of pathogenic bacteria and viruses as well as their applications in food safety control, environmental monitoring, and clinical diagnosis.
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Affiliation(s)
- Dongxue Zhang
- Department of Chemistry, Shanghai Stomatological Hospital, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Fudan University , Shanghai , China 200433
| | - Hongyan Bi
- College of Food Science and Engineering , Shanghai Ocean University , Shanghai , China 201306
| | - Baohong Liu
- Department of Chemistry, Shanghai Stomatological Hospital, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Fudan University , Shanghai , China 200433
| | - Liang Qiao
- Department of Chemistry, Shanghai Stomatological Hospital, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials , Fudan University , Shanghai , China 200433
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Marchand R, Thibault C, Carcenac F, Vieu C, Trévisiol E. Integration of solid-state nanopores into a functional device designed for electrical and optical cross-monitoring. Biomed Microdevices 2017; 19:60. [DOI: 10.1007/s10544-017-0195-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ghobadi M, Rana A, Esfahani ET, Esfandiari L. Quantitative estimation of electro-osmosis force on charged particles inside a borosilicate resistive-pulse sensor. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2016:4228-4231. [PMID: 28269215 DOI: 10.1109/embc.2016.7591660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nano and micron-scale pore sensors have been widely used for biomolecular sensing application due to its sensitive, label-free and potentially cost-effective criteria. Electrophoretic and electroosmosis are major forces which play significant roles on the sensor's performance. In this work, we have developed a mathematical model based on experimental and simulation results of negatively charged particles passing through a 2μm diameter solid-state borosilicate pore under a constant applied electric field. The mathematical model has estimated the ratio of electroosmosis force to electrophoretic force on particles to be 77.5%.
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Abstract
PURPOSE OF REVIEW Epigenetic mechanisms of transcriptional regulation in atherosclerosis have gained an increasing interest in recent years. We focus on the relevance of DNA methylation, a well characterized epigenetic modification of the genome, as a biomarker and underlying mechanism of atherosclerosis. RECENT FINDINGS A growing number of loci have been identified, which are good candidate biomarkers for atherosclerosis and provide novel insights into the molecular changes taking place in the diseased vessel. Understanding the global change in DNA methylation during atherosclerosis remains a challenge. Novel unfolding research avenues include the interplay between genetic variants and DNA methylation patterns, and the role of long noncoding RNAs as epigenetic regulators. SUMMARY Epigenetics continues to represent a promising area of research in atherosclerosis. The full exploitation of cutting edge epigenomics will be decisive to define whether epigenetics will contribute to lower the burden of cardiovascular diseases.
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Affiliation(s)
- Silvio Zaina
- Department of Medical Sciences, Division of Health Sciences, Campus León, University of Guanajuato, León, Mexico
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Mussi V, Fanzio P, Firpo G, Repetto L, Valbusa U. Size and functional tuning of solid state nanopores by chemical functionalization. NANOTECHNOLOGY 2012; 23:435301. [PMID: 23060606 DOI: 10.1088/0957-4484/23/43/435301] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We demonstrate the possibility of using a simple functionalization procedure, based on an initial vapour-phase silanization, to control the size and functionality of solid state nanopores. The presented results show that, by varying the silanization time, it is possible to modify the efficiency of probe molecule attachment, thus shrinking the pore to the chosen size, while introducing a specific sensing selectivity. The proposed method allows us to tune the nanopore biosensor adapting it to the specific final application, and it can be efficiently applied when the pore initial diameter does not exceed a limit dimension related to the mean free path of the silane molecules at the working pressure.
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Affiliation(s)
- Valentina Mussi
- Nanomed Labs, Physics Department, University of Genova, Via Dodecaneso, 33 Genova, I-16146, Italy.
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BiotecVisions 2012, October. Biotechnol J 2012. [DOI: 10.1002/biot.201200057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wahlberg K, Huggett J, Sanders R, Whale AS, Bushell C, Elaswarapu R, Scott DJ, Foy CA. Quality Assessment of Biobanked Nucleic Acid Extracts for Downstream Molecular Analysis. Biopreserv Biobank 2012; 10:266-75. [DOI: 10.1089/bio.2012.0004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Serdyuk IN, Deryusheva EI. Biophysics of single molecules. Biophysics (Nagoya-shi) 2011. [DOI: 10.1134/s0006350911050186] [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] Open
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Mirsaidov U, Comer J, Dimitrov V, Aksimentiev A, Timp G. Slowing the translocation of double-stranded DNA using a nanopore smaller than the double helix. NANOTECHNOLOGY 2010; 21:395501. [PMID: 20808032 PMCID: PMC3170403 DOI: 10.1088/0957-4484/21/39/395501] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
It is now possible to slow and trap a single molecule of double-stranded DNA (dsDNA), by stretching it using a nanopore, smaller in diameter than the double helix, in a solid-state membrane. By applying an electric force larger than the threshold for stretching, dsDNA can be impelled through the pore. Once a current blockade associated with a translocating molecule is detected, the electric field in the pore is switched in an interval less than the translocation time to a value below the threshold for stretching. According to molecular dynamics (MD) simulations, this leaves the dsDNA stretched in the pore constriction with the base-pairs tilted, while the B-form canonical structure is preserved outside the pore. In this configuration, the translocation velocity is substantially reduced from 1 bp/10 ns to approximately 1 bp/2 ms in the extreme, potentially facilitating high fidelity reads for sequencing, precise sorting, and high resolution (force) spectroscopy.
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Affiliation(s)
- Utkur Mirsaidov
- Beckman Institute, University of Illinois, Urbana, IL 61801, USA
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