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Sun Y, Yu H, Han S, Ran R, Yang Y, Tang Y, Wang Y, Zhang W, Tang H, Fu B, Fu B, Weng X, Liu SM, Deng H, Peng S, Zhou X. Method for the extraction of circulating nucleic acids based on MOF reveals cell-free RNA signatures in liver cancer. Natl Sci Rev 2024; 11:nwae022. [PMID: 38348130 PMCID: PMC10860518 DOI: 10.1093/nsr/nwae022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 09/24/2023] [Accepted: 09/24/2023] [Indexed: 02/15/2024] Open
Abstract
Cell-free RNA (cfRNA) allows assessment of health, status, and phenotype of a variety of human organs and is a potential biomarker to non-invasively diagnose numerous diseases. Nevertheless, there is a lack of highly efficient and bias-free cfRNA isolation technologies due to the low abundance and instability of cfRNA. Here, we developed a reproducible and high-efficiency isolation technology for different types of cell-free nucleic acids (containing cfRNA and viral RNA) in serum/plasma based on the inclusion of nucleic acids by metal-organic framework (MOF) materials, which greatly improved the isolation efficiency and was able to preserve RNA integrity compared with the most widely used research kit method. Importantly, the quality of cfRNA extracted by the MOF method is about 10-fold that of the kit method, and the MOF method isolates more than three times as many different RNA types as the kit method. The whole transcriptome mapping characteristics of cfRNA in serum from patients with liver cancer was described and a cfRNA signature with six cfRNAs was identified to diagnose liver cancer with high diagnostic efficiency (area under curve = 0.905 in the independent validation cohort) using this MOF method. Thus, this new MOF isolation technique will advance the field of liquid biopsy, with the potential to diagnose liver cancer.
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Affiliation(s)
- Yuqing Sun
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Haixin Yu
- Department of Digestive Surgical Oncology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Shaoqing Han
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Ruoxi Ran
- Department of Clinical Laboratory, Center for Gene Diagnosis and Program of Clinical Laboratory, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Ying Yang
- Department of Clinical Laboratory, Center for Gene Diagnosis and Program of Clinical Laboratory, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Yongling Tang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Yuhao Wang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Wenhao Zhang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Heng Tang
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Boqiao Fu
- College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 432000, China
| | - Boshi Fu
- Department of Pharmacology, School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Xiaocheng Weng
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Song-Mei Liu
- Department of Clinical Laboratory, Center for Gene Diagnosis and Program of Clinical Laboratory, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Hexiang Deng
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Shuang Peng
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Xiang Zhou
- College of Chemistry and Molecular Sciences, Key Laboratory of Biomedical Polymers-Ministry of Education, Wuhan University, Wuhan 430072, China
- Taikang Center for Life and Medical Sciences, Wuhan University, Wuhan 430071, China
- Department of Hematology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
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2
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Thakur Y, Tripathi M, Verma B, Khilari R, Agrawal R, Likheshwari, Pande R, Mohapatra E. New insight into the DNA binding studies, In-Vitro anti-cancer activity and molecular modelling of dioxo complexes of Molybdenum(VI) and Tungsten(VI) hydroxamic acids. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2019.1578615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Yamini Thakur
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India
| | - Mamta Tripathi
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India
| | - Bharati Verma
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India
| | - Rubi Khilari
- CSIR-Central Institute of Mining and Fuel Research, Bilaspur Unit, Chhattisgarh, India
| | - Rainy Agrawal
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India
| | - Likheshwari
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India
| | - Rama Pande
- School of Studies in Chemistry, Pt. Ravishankar Shukla University, Raipur, Chhattisgarh, India
| | - Eli Mohapatra
- Biochemistry Department, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
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3
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Testo and testo-Pt(II) bind DNA at different locations. Chem Biol Interact 2018; 296:179-184. [PMID: 30253125 DOI: 10.1016/j.cbi.2018.09.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 08/27/2018] [Accepted: 09/17/2018] [Indexed: 01/27/2023]
Abstract
The development of new targeted anticancer agents able to efficiently and specifically destroy cancer cells with minimal toxic side effects is nowadays a subject of intensive research endeavors. We report the conjugation of testo and testo-Pt(II) (two semi-synthetic testosterone derivatives) with calf thymus DNA in aqueous solution at physiological pH. Multiple spectroscopic methods, thermodynamic analysis and modeling were used to determine the binding efficacy of these drugs to DNA duplex. Thermodynamic parameters showed drug-DNA conjugation occurs via ionic interactions with testo-Pt(II) forming more stable DNA adducts than testo with Ktesto-DNA = 1.80 (±0.5) x 105 M-1 and Ktesto-Pt(II)-DNA = 2.3 (±0.8) x 105 M-1. Molecular modeling shows that testo and testo-Pt(II) bind DNA at different locations.
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4
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STING-dependent sensing of self-DNA drives silica-induced lung inflammation. Nat Commun 2018; 9:5226. [PMID: 30523277 PMCID: PMC6283886 DOI: 10.1038/s41467-018-07425-1] [Citation(s) in RCA: 167] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 10/28/2018] [Indexed: 12/11/2022] Open
Abstract
Silica particles induce lung inflammation and fibrosis. Here we show that stimulator of interferon genes (STING) is essential for silica-induced lung inflammation. In mice, silica induces lung cell death and self-dsDNA release in the bronchoalveolar space that activates STING pathway. Degradation of extracellular self-dsDNA by DNase I inhibits silica-induced STING activation and the downstream type I IFN response. Patients with silicosis have increased circulating dsDNA and CXCL10 in sputum, and patients with fibrotic interstitial lung disease display STING activation and CXCL10 in the lung. In vitro, while mitochondrial dsDNA is sensed by cGAS-STING in dendritic cells, in macrophages extracellular dsDNA activates STING independent of cGAS after silica exposure. These results reveal an essential function of STING-mediated self-dsDNA sensing after silica exposure, and identify DNase I as a potential therapy for silica-induced lung inflammation. Silica particles induce intereukin-1 (IL-1) response to contribute to lung inflammation, but the underlying mechanism is unclear. Here the authors show that silica induces cell death and release of mitochondria and genomic DNA, which are sensed by STING with or without involving cGAS, respectively, for IL-1 induction and lung inflammation.
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5
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DNA binding efficacy with functionalized folic acid-PAMAM nanoparticles. Chem Biol Interact 2018; 290:52-56. [DOI: 10.1016/j.cbi.2018.05.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/15/2018] [Accepted: 05/21/2018] [Indexed: 01/01/2023]
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6
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Lee YK, Yu KJ, Kim Y, Yoon Y, Xie Z, Song E, Luan H, Feng X, Huang Y, Rogers JA. Kinetics and Chemistry of Hydrolysis of Ultrathin, Thermally Grown Layers of Silicon Oxide as Biofluid Barriers in Flexible Electronic Systems. ACS APPLIED MATERIALS & INTERFACES 2017; 9:42633-42638. [PMID: 29178781 PMCID: PMC6800003 DOI: 10.1021/acsami.7b15302] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Flexible electronic systems for bioimplants that offer long-term (multidecade) stability and safety in operation require thin, biocompatible layers that can prevent biofluid penetration. Recent work shows that ultrathin films of silicon dioxide thermally grown (TG-SiO2) on device-grade silicon wafers and then released as transferrable barriers offer a remarkable set of attributes in this context. This paper examines the chemical stability of these materials in aqueous solutions with different combinations of chemistries that are present in biofluids. Systematic measurements reveal the dependence of the dissolution rate of TG-SiO2 on concentrations of cations (Na+, K+, Mg2+, Ca2+) and anions (Cl-, HPO42-) at near-neutral pH. Certain results are consistent with previous studies on bulk samples of quartz and nanoparticles of amorphous silica; others reveal significant catalyzing effects associated with divalent cations at high pH and with specific anions at high ionic strength. In particular, Ca2+ and HPO42- greatly enhance and silicic acid greatly reduces the rates. These findings establish foundational data of relevance to predicting lifetimes of implantable devices that use TG-SiO2 as biofluid barriers, and of other classes of systems, such as environmental monitors, where encapsulation against water penetration is important.
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Affiliation(s)
- Yoon Kyeung Lee
- Department of Chemistry, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
| | - Ki Jun Yu
- Department of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Yerim Kim
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
| | - Younghee Yoon
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
| | - Zhaoqian Xie
- Department of Civil and Environmental Engineering, Mechanical Engineering, and Materials Science and Engineering, McCormick School of Engineering, and Feinberg School of Medicine, Northwestern University, Evanston, Illinois 60208, United States
- AML, Department of Engineering Mechanics, Center for Mechanics and Materials, Tsinghua University, Beijing 100084, China
| | - Enming Song
- Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801, United States
- Department of Materials Science, Fudan University, Shanghai 200433, P.R. China
| | - Haiwen Luan
- Department of Civil and Environmental Engineering, Mechanical Engineering, and Materials Science and Engineering, McCormick School of Engineering, and Feinberg School of Medicine, Northwestern University, Evanston, Illinois 60208, United States
| | - Xue Feng
- AML, Department of Engineering Mechanics, Center for Mechanics and Materials, Tsinghua University, Beijing 100084, China
| | - Yonggang Huang
- Department of Civil and Environmental Engineering, Mechanical Engineering, and Materials Science and Engineering, McCormick School of Engineering, and Feinberg School of Medicine, Northwestern University, Evanston, Illinois 60208, United States
| | - John A. Rogers
- Center for Bio-Integrated Electronics, Departments of Materials Science and Engineering, Biomedical Engineering, Chemistry, Mechanical Engineering, Electrical Engineering and Computer Science, and Neurological Surgery, Simpson Querrey Institute for Nano/biotechnology, McCormick School of Engineering, and Feinberg School of Medicine, Northwestern University, Evanston, Illinois 60208, United States
- Corresponding Author
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Kapusuz D, Durucan C. Exploring encapsulation mechanism of DNA and mononucleotides in sol-gel derived silica. J Biomater Appl 2017; 32:114-125. [PMID: 28566001 DOI: 10.1177/0885328217713104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The encapsulation mechanism of DNA in sol-gel derived silica has been explored in order to elucidate the effect of DNA conformation on encapsulation and to identify the nature of chemical/physical interaction of DNA with silica during and after sol-gel transition. In this respect, double stranded DNA and dAMP (2'-deoxyadenosine 5'-monophosphate) were encapsulated in silica using an alkoxide-based sol-gel route. Biomolecule-encapsulating gels have been characterized using UV-Vis, 29Si NMR, FTIR spectroscopy and gas adsorption (BET) to investigate chemical interactions of biomolecules with the porous silica network and to examine the extent of sol-gel reactions upon encapsulation. Ethidium bromide intercalation and leach out tests showed that helix conformation of DNA was preserved after encapsulation. For both biomolecules, high water-to-alkoxide ratio promoted water-producing condensation and prevented alcoholic denaturation. NMR and FTIR analyses confirmed high hydraulic reactivity (water adsorption) for more silanol groups-containing DNA and dAMP encapsulated gels than plain silica gel. No chemical binding/interaction occurred between biomolecules and silica network. DNA and dAMP encapsulated silica gelled faster than plain silica due to basic nature of DNA or dAMP containing buffer solutions. DNA was not released from silica gels to aqueous environment up to 9 days. The chemical association between DNA/dAMP and silica host was through phosphate groups and molecular water attached to silanols, acting as a barrier around biomolecules. The helix morphology was found not to be essential for such interaction. BET analyses showed that interconnected, inkbottle-shaped mesoporous silica network was condensed around DNA and dAMP molecules.
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Affiliation(s)
- Derya Kapusuz
- 1 Department of Metallurgical and Materials Engineering, Gaziantep University, Gaziantep, Turkey
| | - Caner Durucan
- 2 Department of Metallurgical and Materials Engineering, Middle East Technical University, Ankara, Turkey.,3 BIOMATEN Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
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8
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Paziewska−Nowak A, Jankowska−Śliwińska J, Dawgul M, Pijanowska DG. Selective Electrochemical Detection of Pirarubicin by Means of DNA-modified Graphite Biosensor. ELECTROANAL 2017. [DOI: 10.1002/elan.201700067] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Agnieszka Paziewska−Nowak
- Nalecz Institute of Biocybernetics and Biomedical Engineering; PAS; Trojdena St. 4 02-109 Warsaw Poland
| | | | - Marek Dawgul
- Nalecz Institute of Biocybernetics and Biomedical Engineering; PAS; Trojdena St. 4 02-109 Warsaw Poland
| | - Dorota G. Pijanowska
- Nalecz Institute of Biocybernetics and Biomedical Engineering; PAS; Trojdena St. 4 02-109 Warsaw Poland
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9
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Effect of testosterone and its aliphatic and aromatic dimers on DNA morphology. Int J Biol Macromol 2016; 95:850-855. [PMID: 27693340 DOI: 10.1016/j.ijbiomac.2016.09.090] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 09/25/2016] [Accepted: 09/26/2016] [Indexed: 02/06/2023]
Abstract
Conjugation of DNA with testosterone and it aliphatic dimer (alip) and aromatic dimer (arom) was investigated in aqueous solution at pH 7.4. Multiple spectroscopic methods, transmission electron microscopy (TEM) and molecular modeling were used to characterize steroid-DNA binding and DNA morphology. Spectroscopic analysis showed that testosterone binds DNA via A7, A16, A17, T8, T15 and T18 nucleobases with overall binding constants Ktest-DNA=1.8 (±0.4)×104M-1, Ktest-dimeralip-DNA=5.7 (±0.7)×104M-1 and Ktest-dimer-arom-DNA=7.3 (±0.9)×104M-1. The binding affinity increases in this order: testosterone dimer-aromatic>testosterone dimer-aliphatic>testosterone. The steroid loading efficacy was 40-50%. Transmission electron microscopy showed major changes in DNA morphology as testosterone-DNA interaction occurred with increase in the diameter of the DNA aggregate, indicating encapsulation of testosterone by DNA. Modeling showed the presence of several nucleobases attached to testosterone with the free binding energy of -4.93Kcal/mol.
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Liébana S, Brandão D, Cortés P, Campoy S, Alegret S, Pividori MI. Electrochemical genosensing of Salmonella, Listeria and Escherichia coli on silica magnetic particles. Anal Chim Acta 2015; 904:1-9. [PMID: 26724759 DOI: 10.1016/j.aca.2015.09.044] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/17/2015] [Accepted: 09/23/2015] [Indexed: 11/17/2022]
Abstract
A magneto-genosensing approach for the detection of the three most common pathogenic bacteria in food safety, such as Salmonella, Listeria and Escherichia coli is presented. The methodology is based on the detection of the tagged amplified DNA obtained by single-tagging PCR with a set of specific primers for each pathogen, followed by electrochemical magneto-genosensing on silica magnetic particles. A set of primers were selected for the amplification of the invA (278 bp), prfA (217 bp) and eaeA (151 bp) being one of the primers for each set tagged with fluorescein, biotin and digoxigenin coding for Salmonella enterica, Listeria monocytogenes and E. coli, respectively. The single-tagged amplicons were then immobilized on silica MPs based on the nucleic acid-binding properties of silica particles in the presence of the chaotropic agent as guanidinium thiocyanate. The assessment of the silica MPs as a platform for electrochemical magneto-genosensing is described, including the main parameters to selectively attach longer dsDNA fragments instead of shorter ssDNA primers based on their negative charge density of the sugar-phosphate backbone. This approach resulted to be a promising detection tool with sensing features of rapidity and sensitivity very suitable to be implemented on DNA biosensors and microfluidic platforms.
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Affiliation(s)
- Susana Liébana
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès (Bellaterra), Spain
| | - Delfina Brandão
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès (Bellaterra), Spain
| | - Pilar Cortés
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès (Bellaterra), Spain
| | - Susana Campoy
- Departament de Genètica i de Microbiologia, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès (Bellaterra), Spain
| | - Salvador Alegret
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès (Bellaterra), Spain
| | - María Isabel Pividori
- Grup de Sensors i Biosensors, Departament de Química, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès (Bellaterra), Spain.
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11
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Gnapareddy B, Reddy Dugasani S, Ha T, Paulson B, Hwang T, Kim T, Hoon Kim J, Oh K, Park SH. Chemical and Physical Characteristics of Doxorubicin Hydrochloride Drug-Doped Salmon DNA Thin Films. Sci Rep 2015; 5:12722. [PMID: 26228987 PMCID: PMC4530373 DOI: 10.1038/srep12722] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 06/24/2015] [Indexed: 11/17/2022] Open
Abstract
Double-stranded salmon DNA (SDNA) was doped with doxorubicin hydrochloride drug molecules (DOX) to determine the binding between DOX and SDNA, and DOX optimum doping concentration in SDNA. SDNA thin films were prepared with various concentrations of DOX by drop-casting on oxygen plasma treated glass and quartz substrates. Fourier transform infrared (FTIR) spectroscopy was employed to investigate the binding sites for DOX in SDNA, and electrical and photoluminescence (PL) analyses were used to determine the optimum doping concentration of DOX. The FTIR spectra showed that up to a concentration of 30 μM of DOX, there was a tendency for binding with a periodic orientation via intercalation between nucleosides. The current and PL intensity increased as the DOX concentration increased up to 30 μM, and then as the concentration of DOX further increased, we observed a decrease in current as well as PL quenching. Finally, the optical band gap and second band onset of the transmittance spectra were analyzed to further verify the DOX binding and optimum doping concentration into SDNA thin films as a function of the DOX concentration.
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Affiliation(s)
- Bramaramba Gnapareddy
- Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea
- Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
| | - Sreekantha Reddy Dugasani
- Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea
- Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
| | - Taewoo Ha
- Department of Physics, Yonsei University, Seoul 120-749, Korea
| | - Bjorn Paulson
- Department of Physics, Yonsei University, Seoul 120-749, Korea
| | - Taehyun Hwang
- Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
| | - Taesung Kim
- Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
| | - Jae Hoon Kim
- Department of Physics, Yonsei University, Seoul 120-749, Korea
| | - Kyunghwan Oh
- Department of Physics, Yonsei University, Seoul 120-749, Korea
| | - Sung Ha Park
- Sungkyunkwan Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 440-746, Korea
- Department of Physics, Sungkyunkwan University, Suwon 440-746, Korea
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12
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Yetgin S, Balkose D. Calf thymus DNA characterization and its adsorption on different silica surfaces. RSC Adv 2015. [DOI: 10.1039/c5ra01810b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Barton HA, Giarrizzo JG, Suarez P, Robertson CE, Broering MJ, Banks ED, Vaishampayan PA, Venkateswaran K. Microbial diversity in a Venezuelan orthoquartzite cave is dominated by the Chloroflexi (Class Ktedonobacterales) and Thaumarchaeota Group I.1c. Front Microbiol 2014; 5:615. [PMID: 25505450 PMCID: PMC4244709 DOI: 10.3389/fmicb.2014.00615] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 10/28/2014] [Indexed: 01/10/2023] Open
Abstract
The majority of caves are formed within limestone rock and hence our understanding of cave microbiology comes from carbonate-buffered systems. In this paper, we describe the microbial diversity of Roraima Sur Cave (RSC), an orthoquartzite (SiO4) cave within Roraima Tepui, Venezuela. The cave contains a high level of microbial activity when compared with other cave systems, as determined by an ATP-based luminescence assay and cell counting. Molecular phylogenetic analysis of microbial diversity within the cave demonstrates the dominance of Actinomycetales and Alphaproteobacteria in endolithic bacterial communities close to the entrance, while communities from deeper in the cave are dominated (82–84%) by a unique clade of Ktedonobacterales within the Chloroflexi. While members of this phylum are commonly found in caves, this is the first identification of members of the Class Ktedonobacterales. An assessment of archaeal species demonstrates the dominance of phylotypes from the Thaumarchaeota Group I.1c (100%), which have previously been associated with acidic environments. While the Thaumarchaeota have been seen in numerous cave systems, the dominance of Group I.1c in RSC is unique and a departure from the traditional archaeal community structure. Geochemical analysis of the cave environment suggests that water entering the cave, rather than the nutrient-limited orthoquartzite rock, provides the carbon and energy necessary for microbial community growth and subsistence, while the poor buffering capacity of quartzite or the low pH of the environment may be selecting for this unusual community structure. Together these data suggest that pH, imparted by the geochemistry of the host rock, can play as important a role in niche-differentiation in caves as in other environmental systems.
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Affiliation(s)
- Hazel A Barton
- Department of Biology and Department of Geosciences, University of Akron Akron, OH, USA
| | - Juan G Giarrizzo
- Department of Biological Sciences, Northern Kentucky University, Highland Heights KY, USA
| | - Paula Suarez
- Departamento de Biología de Organismos, Universidad Simón Bolívar Caracas, Venezuela
| | - Charles E Robertson
- Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder CO, USA
| | - Mark J Broering
- Department of Biological Sciences, Northern Kentucky University, Highland Heights KY, USA
| | - Eric D Banks
- Department of Biological Sciences, Northern Kentucky University, Highland Heights KY, USA
| | - Parag A Vaishampayan
- Biotechnology and Planetary Protection Group, Jet Propulsion Laboratory, California Institute of Technology Pasadena, CA, USA
| | - Kasthisuri Venkateswaran
- Biotechnology and Planetary Protection Group, Jet Propulsion Laboratory, California Institute of Technology Pasadena, CA, USA
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14
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Tang Z, Lu B, Zhao Q, Wang J, Luo K, Yu D. Surface modification of solid-state nanopores for sticky-free translocation of single-stranded DNA. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:4332-9. [PMID: 25044955 DOI: 10.1002/smll.201401091] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 06/15/2014] [Indexed: 05/25/2023]
Abstract
Nanopore technology is one of the most promising approaches for fast and low-cost DNA sequencing application. Single-stranded DNA detection is primary objective in such device, while solid-state nanopores remain less explored than their biological counterparts due to bio-molecule clogging issue caused by surface interaction between DNA and nanopore wall. By surface coating a layer of polyethylene glycol (PEG), solid-state nanopore can achieve long lifetime for single-stranded DNA sticky-free translocation at pH 11.5. Associated with elimination of non-specific binding of molecule, PEG coated nanopore presents new surface characteristic as less hydrophility, lower 1/f noise, and passivated surface charge responsiveness on pH. Meanwhile, conductance blockage of single-stranded DNA is found to be deeper than double-stranded DNA, which can be well described by a string of blobs model for a quasi-equilibrium state polymer in constraint space.
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Affiliation(s)
- Zhipeng Tang
- State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, P. R. China
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Immunoaffinity Nanoprobe-Based MALDI-TOF MS for Detection of Fragments of N-Telopeptides of Type I Collagen. Int J Pept Res Ther 2013. [DOI: 10.1007/s10989-013-9373-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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De La Vega J, Braak BT, Azzoni AR, Monteiro GA, Prazeres DMF. Impact of plasmid quality on lipoplex-mediated transfection. J Pharm Sci 2013; 102:3932-41. [PMID: 23996350 DOI: 10.1002/jps.23709] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 07/22/2013] [Accepted: 07/29/2013] [Indexed: 01/20/2023]
Abstract
This work investigates the impact of quality attributes (impurity content, plasmid charge, and compactness) of plasmid DNA isolated with different purification methodologies on the characteristics of lipoplexes prepared thereof (size, zeta potential, stability) and on their ability to transfect mammalian cells. A 3.7 kb plasmid with a green fluorescence protein (GFP) reporter gene, Lipofectamine®-based liposomes, and Chinese Hamster Ovary (CHO) cells were used as models. The plasmid was purified by hydrophobic interaction chromatography (HIC)/gel filtration, and with three commercial kits, which combine the use of chaotropic salts with silica membranes/glass fiber fleeces. The HIC-based protocol delivered a plasmid with the smallest hydrodynamic diameter (144 nm) and zeta potential (-46.5 mV), which is virtually free from impurities. When formulated with Lipofectamine®, this plasmid originated the smallest (146 nm), most charged (+13 mV), and most stable lipoplexes. In vitro transfection experiments further showed that these lipoplexes performed better in terms of plasmid uptake (∼500,000 vs. ∼100,000-200,000 copy number/cell), transfection efficiency (50% vs. 20%-40%), and GFP expression levels (twofold higher) when compared with lipoplexes prepared with plasmids isolated using commercial kits. Overall our observations highlight the potential impact that plasmid purification methodologies can have on the outcome of gene transfer experiments and trials.
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Affiliation(s)
- Jonathan De La Vega
- IBB-Institute for Biotechnology and Bioengineering, Centre for Biological and Chemical Engineering, Department of Bioengineering, Instituto Superior Técnico, Universidade Técnica de Lisboa, Lisboa, 1049-001, Portugal
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Kang F, Wang H, Gao Y, Long J, Wang Q. Ca2+ promoted the low transformation efficiency of plasmid DNA exposed to PAH contaminants. PLoS One 2013; 8:e58238. [PMID: 23484001 PMCID: PMC3590140 DOI: 10.1371/journal.pone.0058238] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 02/01/2013] [Indexed: 11/18/2022] Open
Abstract
The effects of interactions between genetic materials and polycyclic aromatic hydrocarbons (PAHs) on gene expression in the extracellular environment remain to be elucidated and little information is currently available on the effect of ionic strength on the transformation of plasmid DNA exposed to PAHs. Phenanthrene and pyrene were used as representative PAHs to evaluate the transformation of plasmid DNA after PAH exposure and to determine the role of Ca2+ during the transformation. Plasmid DNA exposed to the test PAHs demonstrated low transformation efficiency. In the absence of PAHs, the transformation efficiency was 4.7 log units; however, the efficiency decreased to 3.72–3.14 log units with phenanthrene/pyrene exposures of 50 µg·L–1. The addition of Ca2+ enhanced the low transformation efficiency of DNA exposed to PAHs. Based on the co-sorption of Ca2+ and phenanthrene/pyrene by DNA, we employed Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and mass spectrometry (MS) to determine the mechanisms involved in PAH-induced DNA transformation. The observed low transformation efficiency of DNA exposed to either phenanthrene or pyrene can be attributed to a broken hydrogen bond in the double helix caused by planar PAHs. Added Ca2+ formed strong electrovalent bonds with “–POO––” groups in the DNA, weakening the interaction between PAHs and DNA based on weak molecular forces. This decreased the damage of PAHs to hydrogen bonds in double-stranded DNA by isolating DNA molecules from PAHs and consequently enhanced the transformation efficiency of DNA exposed to PAH contaminants. The findings provide insight into the effects of anthropogenic trace PAHs on DNA transfer in natural environments.
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Affiliation(s)
- Fuxing Kang
- Institute of Organic Contaminant Control and Soil Remediation, College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, People’s Republic of China
- Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang, People’s Republic of China
| | - Hong Wang
- Institute of Organic Contaminant Control and Soil Remediation, College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, People’s Republic of China
| | - Yanzheng Gao
- Institute of Organic Contaminant Control and Soil Remediation, College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing, People’s Republic of China
- * E-mail:
| | - Jian Long
- Key Laboratory for Information System of Mountainous Areas and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang, People’s Republic of China
| | - Qian Wang
- School of Earth Science and Engineering, Nanjing University, Nanjing, People’s Republic of China
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18
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Rawtani D, Agrawal YK. A Study of the Behavior of HNT with DNA Intercalator Acridine Orange. BIONANOSCIENCE 2012. [DOI: 10.1007/s12668-012-0066-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Saladino R, Botta G, Pino S, Costanzo G, Di Mauro E. Genetics first or metabolism first? The formamide clue. Chem Soc Rev 2012; 41:5526-65. [PMID: 22684046 DOI: 10.1039/c2cs35066a] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Life is made of the intimate interaction of metabolism and genetics, both built around the chemistry of the most common elements of the Universe (hydrogen, oxygen, nitrogen, and carbon). The transmissible interaction of metabolic and genetic cycles results in the hypercycles of organization and de-organization of chemical information, of living and non-living. The origin-of-life quest has long been split into several attitudes exemplified by the aphorisms "genetics-first" or "metabolism-first". Recently, the opposition between these approaches has been solved by more unitary theoretical and experimental frames taking into account energetic, evolutionary, proto-metabolic and environmental aspects. Nevertheless, a unitary and simple chemical frame is still needed that could afford both the precursors of the synthetic pathways eventually leading to RNA and to the key components of the central metabolic cycles, possibly connected with the synthesis of fatty acids. In order to approach the problem of the origin of life it is therefore reasonable to start from the assumption that both metabolism and genetics had a common origin, shared a common chemical frame, and were embedded under physical-chemical conditions favourable for the onset of both. The singleness of such a prebiotically productive chemical process would partake of Darwinian advantages over more complex fragmentary chemical systems. The prebiotic chemistry of formamide affords in a single and simple physical-chemical frame nucleic bases, acyclonucleosides, nucleotides, biogenic carboxylic acids, sugars, amino sugars, amino acids and condensing agents. Thus, we suggest the possibility that formamide could have jointly provided the main components for the onset of both (pre)genetic and (pre)metabolic processes. As a note of caution, we discuss the fact that these observations only indicate possible solutions at the level of organic substrates, not at the systemic chemical level.
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Affiliation(s)
- Raffaele Saladino
- Dipartimento di Agrobiologia ed Agrochimica, Università della Tuscia, Via San Camillo De Lellis, 01100 Viterbo, Italy.
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20
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Lu N, Mylon SE, Kong R, Bhargava R, Zilles JL, Nguyen TH. Interactions between dissolved natural organic matter and adsorbed DNA and their effect on natural transformation of Azotobacter vinelandii. THE SCIENCE OF THE TOTAL ENVIRONMENT 2012; 426:430-435. [PMID: 22542236 DOI: 10.1016/j.scitotenv.2012.03.063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 03/01/2012] [Accepted: 03/23/2012] [Indexed: 05/31/2023]
Abstract
To better understand gene transfer in the soil environment, the interactions between dissolved natural organic matter (NOM) and chromosomal or plasmid DNA adsorbed to silica surfaces were investigated. The rates of NOM adsorption onto silica surfaces coated with DNA were measured by quartz crystal microbalance (QCM) and showed a positive correlation with carboxylate group density for both soil and aquatic NOM in solutions containing either 1mM Ca(2+) or Mg(2+). Increasing total dissolved organic carbon (DOC) concentrations of the NOM solution also resulted in an increase in the adsorption rates, likely due to divalent cation complexation with NOM carboxylate groups and the phosphate backbones of the DNA. The results from Fourier transform infrared spectroscopy (FTIR) for dissolved DNA and DNA adsorbed on silica beads also suggest that adsorption may result from divalent cation complexation with the DNA's phosphate backbone. The interactions, between DNA and NOM, however, did not influence natural transformation of Azotobacter vinelandii by DNA. These results suggest that DNA adsorbed to NOM-coated silica or otherwise complexed with NOM remains available for natural transformation in the environment.
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Affiliation(s)
- Nanxi Lu
- Department of Civil and Environmental Engineering, University of Illinois at Urbana Champaign, Urbana, IL 61801, USA
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21
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Sellamuthu R, Umbright C, Li S, Kashon M, Joseph P. Mechanisms of crystalline silica-induced pulmonary toxicity revealed by global gene expression profiling. Inhal Toxicol 2011; 23:927-37. [PMID: 22087542 DOI: 10.3109/08958378.2011.625995] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A proper understanding of the mechanisms underlying crystalline silica-induced pulmonary toxicity has implications in the management and potential prevention of the adverse health effects associated with silica exposure including silicosis, cancer and several auto-immune diseases. Human lung type II epithelial cells and rat lungs exposed to crystalline silica were employed as experimental models to determine global gene expression changes in order to understand the molecular mechanisms underlying silica-induced pulmonary toxicity. The differential gene expression profile induced by silica correlated with its toxicity in the A549 cells. The biological processes perturbed by silica exposure in the A549 cells and rat lungs, as identified by the bioinformatics analysis of the differentially expressed genes, demonstrated significant similarity. Functional categorization of the differentially expressed genes identified cancer, cellular movement, cellular growth and proliferation, cell death, inflammatory response, cell cycle, cellular development, and genetic disorder as top ranking biological functions perturbed by silica exposure in A549 cells and rat lungs. Results of our study, in addition to confirming several previously identified molecular targets and mechanisms involved in silica toxicity, identified novel molecular targets and mechanisms potentially involved in silica-induced pulmonary toxicity. Further investigations, including those focused on the novel molecular targets and mechanisms identified in the current study may result in better management and, possibly, reduction and/or prevention of the potential adverse health effects associated with crystalline silica exposure.
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Affiliation(s)
- Rajendran Sellamuthu
- Toxicology and Molecular Biology Branch, National Institute for Occupational Safety and Health (NIOSH), Morgantown, WV 26505, USA
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23
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Cao Y, Wei X, Cai P, Huang Q, Rong X, Liang W. Preferential adsorption of extracellular polymeric substances from bacteria on clay minerals and iron oxide. Colloids Surf B Biointerfaces 2011; 83:122-7. [DOI: 10.1016/j.colsurfb.2010.11.018] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Revised: 11/03/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
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24
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Amano T, Toyooka T, Ibuki Y. Preparation of DNA-adsorbed TiO2 particles--augmentation of performance for environmental purification by increasing DNA adsorption by external pH regulation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2010; 408:480-485. [PMID: 19896163 DOI: 10.1016/j.scitotenv.2009.10.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 10/01/2009] [Accepted: 10/13/2009] [Indexed: 05/28/2023]
Abstract
We have previously developed a novel photocatalyst, DNA-attached titanium dioxide (DNA-TiO(2)), useful for the recovery and decomposition of chemicals [Suzuki et al. Environ. Sci. Technol. 42, 8076, 2008]. Chemicals accumulated in DNA near the surface of TiO(2) and were degraded under UV light. The efficiency of their removal was dependent on the amount of DNA adsorbed on TiO(2), indicating the attachment of larger amounts of DNA to result in higher efficiency. In this study, we succeeded in improving the performance of DNA-TiO(2) by increasing the amount of DNA adsorbed by regulating the external pH. The adsorption of DNA by TiO(2) dramatically increased at pH2, to about fourfold that at other pH values (pH4-10). Repeating the process of DNA addition increased the adsorption further. The attached DNA was stable on the surface of TiO(2) at pH2-10 and 4-56 degrees C, the same as DNA-TiO(2) prepared at pH7. As the DNA-TiO(2) prepared at pH2 retained much DNA on its surface, chemicals (methylene blue, ethidium bromide, etc.) which could intercalate or react with DNA were effectively removed from solutions. The photocatalytic degradation was slow at first, but the final degradation rate was higher than for non-adsorbed TiO(2) and DNA-TiO(2) prepared at pH7. These results indicated that preparation of DNA-TiO(2) at pH2 has advantages in that much DNA can be attached and large amounts of chemicals can be concentrated in the DNA, resulting in extensive decomposition under UV light.
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Affiliation(s)
- Takeharu Amano
- Laboratory of Radiation Biology, Institute for Environmental Sciences, Graduate School of Nutritional and Environmental Sciences, University of Shizuoka, 52-1 Yada, Shizuoka-shi 422-8526, Japan
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25
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Kuimova MK, Chan KLA, Kazarian SG. Chemical imaging of live cancer cells in the natural aqueous environment. APPLIED SPECTROSCOPY 2009; 63:164-71. [PMID: 19215645 DOI: 10.1366/000370209787391969] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Chemical imaging with Fourier transform infrared (FT-IR) spectroscopy allows the visualization of the distribution of chemical components in cells without the need for labels or added dyes. However, obtaining such images of living cells is difficult because of the strong absorption of water in the mid-infrared region. We report the use of attenuated total reflection (ATR) FT-IR spectroscopic imaging to study live human cancer cells in an aqueous environment, on a single cell level. Two complementary approaches have been used, providing flexibility with field of view and spatial resolution: (1) micro-ATR FT-IR imaging using a microscope objective with a Ge crystal, and (2) single-reflection diamond ATR-FT-IR imaging. Using both approaches, the ATR-FT-IR spectroscopic signatures allow the differentiation between several cellular organelles, e.g., the nucleus and the endoplasmic reticulum (ER). The overall cell shape can be defined by the distribution of the amide II band in the measured image, while the DNA-rich nucleus and glycogen-rich ER could be imaged using the spectral bands at 1084 cm(-1) and 1023 cm(-1), respectively. We also demonstrate the potential of ATR-FT-IR spectroscopic imaging for unraveling the details of the dynamics of biological processes, which are not accessible from cell ensemble studies, with high molecular specificity and satisfactory spatial resolution.
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Affiliation(s)
- Marina K Kuimova
- Department of Chemistry, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
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26
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Attik G, Brown R, Jackson P, Creutzenberg O, Aboukhamis I, Rihn BH. Internalization, Cytotoxicity, Apoptosis, and Tumor Necrosis Factor-α Expression in Rat Alveolar Macrophages Exposed to Various Dusts Occurring in the Ceramics Industry. Inhal Toxicol 2008; 20:1101-12. [DOI: 10.1080/08958370802136731] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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27
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Cai P, Huang Q, Li M, Liang W. Binding and degradation of DNA on montmorillonite coated by hydroxyl aluminum species. Colloids Surf B Biointerfaces 2008; 62:299-306. [PMID: 18055187 DOI: 10.1016/j.colsurfb.2007.10.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2007] [Revised: 10/27/2007] [Accepted: 10/29/2007] [Indexed: 11/30/2022]
Affiliation(s)
- Peng Cai
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
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Kaewamatawong T, Shimada A, Okajima M, Inoue H, Morita T, Inoue K, Takano H. Acute and subacute pulmonary toxicity of low dose of ultrafine colloidal silica particles in mice after intratracheal instillation. Toxicol Pathol 2007; 34:958-65. [PMID: 17178696 DOI: 10.1080/01926230601094552] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
To study the acute and subacute lung toxicity of low dose of ultrafine colloidal silica particles (UFCSs), mice were intratracheally instilled with 0, 0.3, 3, 10, 30 or 100 microg of UFCSs. Cellular and biochemical parameters in bronchoalveolar lavage fluid (BALF), histological alteration and the body weight were determined at 3 days after instillation. Exposure to 30 or 100 microg of UFCSs produced moderate to severe pulmonary inflammation and tissue injury. To investigate the time response, mice were instilled with 30 microg of UFCSs and sacrificed at intervals from 1 to 30 days post-exposure. UFCSs induced moderate pulmonary inflammation and injury on BALF indices at acute period; however, these changes gradually regressed until recovery during the experiment. Concomitant histopathological and laminin immunohistochemical findings generally correlated to BALF data. TUNEL analyses in UFCSs-treated animals showed a significant increase of the apoptotic index in lung parenchyma at all observation times. 8-OHdG expression occurred in lung epithelial cells and activated macrophages, which correlated to lung lesions in UFCSs-treated mice. These findings suggest that instillation of a small dose of UFCSs causes transient acute moderate lung inflammation and tissue damage. Oxidative stress and apoptosis may underlie the lung tissue injury induction.
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Affiliation(s)
- Theerayuth Kaewamatawong
- Department of Veterinary Pathology, Tottori University, Minami 4-101, Koyama, Tottori-shi, Tottori, Japan
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30
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Pyo N, Tanaka S, McNamee CE, Kanda Y, Fukumori Y, Ichikawa H, Higashitani K. Effect of the cell type and cell density on the binding of living cells to a silica particle: An atomic force microscope study. Colloids Surf B Biointerfaces 2006; 53:278-87. [PMID: 17098400 DOI: 10.1016/j.colsurfb.2006.09.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Revised: 09/01/2006] [Accepted: 09/26/2006] [Indexed: 10/24/2022]
Abstract
We used the atomic force microscope to study how the cell type and the density of cells adsorbed at a substrate can affect the adhesion between a living cell and a model drug delivery system (DDS) carrier nano-particle. We used three different anchorage-dependent cells, i.e., a living mouse fibroblast cell (L929), a living human colon cancer cell (Caco2), and a living mouse malignant melanoma cell (B16F10). For the DDS model nano-particle, we used a silica colloid. In order to correlate the adhesion force with the cell types, the growth curve of the cells were determined with a haemocytometer. The shapes of the cells at the different stages were monitored by light microscopy, and the morphology of their surfaces obtained by tapping mode atomic force microscopy. Force measurements showed that the Caco2 cell bound little to a silica particle, regardless of the cell density. The L929 cell bound well to a silica particle for low and high cell densities. The B16F10 cell bound little to a silica particle for low cell densities, but bound well for high cell densities. AFM images showed that the L929 cell did not contain folds. The B16F10 cells, however, displayed folds in the cell surface for low cell densities, but no folds in the cell for high cell densities. As literature also reported that the Caco2 cell contains folds, these results suggested that cells with folds showed less adhesion to a silica particle than cells without folds. The presence of folds in the cell presumably decreased the number of sites on the cell that could hydrogen bond or undergo van der Waals binding with the silanol groups of the silica particle.
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Affiliation(s)
- Nayoung Pyo
- Department of Chemical Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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Kaewamatawong T, Kawamura N, Okajima M, Sawada M, Morita T, Shimada A. Acute pulmonary toxicity caused by exposure to colloidal silica: particle size dependent pathological changes in mice. Toxicol Pathol 2006; 33:743-9. [PMID: 16306027 DOI: 10.1080/01926230500416302] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
To compare the pulmonary toxicity between ultrafine colloidal silica particles (UFCSs) and fine colloidal silica particles (FCSs), mice were intratracheally instilled with 3 mg of 14 nm UFCSs and 230 nm FCSs and pathologically examined from 30 minutes to 24 hour postexposure. Histopathologically, lungs exposed to both sizes of particles showed bronchiolar degeneration and necrosis, neutrophilic inflammation in alveoli with alveolar type II cell swelling and particle-laden alveolar macrophage accumulation. UFCSs, however, induced extensive alveolar hemorrhage compared to FCSs from 30 minutes onwards. UFCSs also caused more severe bronchiolar epithelial cell necrosis and neutrophil influx in alveoli than FCSs at 12 and 24 hours postexposure. Laminin positive immunolabellings in basement membranes of bronchioles and alveoli of UFCSs treated animals was weaker than those of FCSs-treated animals in all observation times. Electron microscopy demonstrated UFCSs and FCSs on bronchiolar and alveolar wall surface as well as in the cytoplasm of alveolar epithelial cells, alveolar macrophages and neutrophils. Type I alveolar epithelial cell erosion with basement membrane damage in UFCSs treated animals was more severe than those in FCSs-treated animals. At 12 and 24 hours postexposure, bronchiolar epithelial cells in UFCSs-treated animals showed more intense vacuolation and necrosis compared to FCSs-treated animals. These findings suggest that UFCSs have greater ability to induce lung inflammation and tissue damages than FCSs.
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Affiliation(s)
- Theerayuth Kaewamatawong
- Department of Veterinary Pathology, Tottori University Minami 4-101, Koyama, Tottori-shi, Tottori 680-0945, Japan
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Franchi M, Bramanti E, Bonzi LM, Orioli PL, Vettori C, Gallori E. Clay-nucleic acid complexes: characteristics and implications for the preservation of genetic material in primeval habitats. ORIGINS LIFE EVOL B 1999; 29:297-315. [PMID: 10465718 DOI: 10.1023/a:1006557832574] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The equilibrium adsorption of three nucleic acids: chromosomal DNA, supercoiled plasmid DNA, and 25S rRNA, on the clay minerals, montmorillonite (M) and kaolinite (K), were studied. Adsorption of the nucleic acid on the clays was rapid and maximal after 90 min of contact time. Chromosomal DNA was adsorbed to a greater extent than plasmid DNA and RNA, and the adsorption was also greater on M than on K. Adsorption isotherms were of the L type, and a plateau was reached with all the complexes, with the exception of chromosomal DNA adsorbed on M. To deterine where nucleic acids are adsorbed on clay minerals and the nature of the interaction, complexes were studied by X-ray diffraction (X-RD), electron microscopy, and Fourier transform infrared (FT-IR) spectroscopy. X-RD showed that nucleic acids did not penetrate the clay, indicating that the adsorption occurred primarily on the external surfaces of clay particles, as also suggested by electron microscopy observations. FT-IR spectra of clay-tightly bound nucleic acid complexes showed adsorption bands that indicate a variation of the nucleic acids status as a consequence of their adsorption on clay. Data obtained suggested that the formation of clay-nucleic acid complex could have an important role in the preservation of genetic material in primeval habitats.
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Affiliation(s)
- M Franchi
- Department of Animal Biology and Genetics, University of Florence, Italy
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Williams AO, Knapton AD, Ifon ET, Saffiotti U. Transforming growth factor beta expression and transformation of rat lung epithelial cells by crystalline silica (quartz). Int J Cancer 1996; 65:639-49. [PMID: 8598316 DOI: 10.1002/(sici)1097-0215(19960301)65:5<639::aid-ijc14>3.0.co;2-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Crystalline silica (quartz) induces silicosis and associated peripheral lung carcinomas in rats. The role and pattern of expression of transforming growth factor (TGF)-beta1/beta2 mRNA transcripts were investigated in the fetal rat lung epithelial cell line FRLE, its neoplastic transformants and derived tumors in athymic nude mice. FRLE cells, treated with 100 microgram/cm2 of quartz in serum-free medium, gave rise to phenotypically altered, tumorigenic cells. Quartz-treated, transformed and tumorigenic cells, subcultured directly (QTT-C1) or after growth in soft agar (QTT-C2), formed tumors in athymic nude mice (QTT-T1). Cells subcultured from the tumors (QTT-T1C) were also tumorigenic in nude mice (QTT-T2). QTT-T1 and QTT-T2 tumors were poorly differentiated carcinomas with variable amounts of extracellular matrix-associated TGF-beta1 and desmoplasia. For comparison, a tumorigenic cell line derived from FRLE cells transformed with a mutated K-ras plasmid (RT-C1) and cells subcultured from a corresponding nude mouse tumor (RT-T1) and designated RT-T1C were used. Whereas TGF-beta1 and TGF-beta2 inhibited the growth of QTT-T1C and FRLE cells in a dose-dependent fashion, RT-T1C cells, containing an activated ras gene, were relatively unaffected. TGF-beta1 and TGF-beta2 mRNAs were expressed at higher levels in QTT-T1C cells than in FRLE and TR-T1C cells, and there was an increase in TGF-beta type II receptor (TGR-betaR) mRNA expression in QTT-T1C and RT-T1C cells compared to FRLE cells. Carcinomas in nude mice derived from QTT and RT cells and silicosis-associated lung carcinomas induced in rats by intra-tracheal quartz did not express either active or latent forms of TGF-beta1 protein on immunohistochemistry. The disparity between TGF-beta1 mRNA and TGF-beta1 protein expression in QTT tumors may be due to post-transcriptional regulation of TGF-beta1.
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Affiliation(s)
- A O Williams
- Laboratory of Experimental Pathology, Division of Cancer Etiology, NCI, NIH, Bethesda, MD 20892, USA
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