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Marengo A, Emaus MN, Bertea CM, Bicchi C, Rubiolo P, Cagliero C, Anderson JL. Arabidopsis thaliana ITS sequence-specific DNA extraction by ion-tagged oligonucleotides coupled with a magnetic ionic liquid. Anal Bioanal Chem 2019; 411:6583-6590. [PMID: 31422433 DOI: 10.1007/s00216-019-02054-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 07/18/2019] [Accepted: 07/26/2019] [Indexed: 12/28/2022]
Abstract
This study reports a follow-up investigation on the capture of specific DNA sequences using ion-tagged oligonucleotides (ITOs) and magnetic ionic liquids (MIL). Five allylimidazolium salts bearing octyl substituents ([AOIM+]-ITOs) were used for the selective extraction of the internal transcribed spacer region (ITS) from Arabidopsis thaliana. In this work, the ability of the [AOIM+]-ITOs to enhance the extraction of longer target sequences (~ 700 bp) of plant origin was shown. Moreover, the independence of the probe binding position and the importance of complementarity to the target region for the extraction performance were demonstrated. To test the specificity of the ITOs, the same experiments were performed using the ITS region from another plant species, with a lower target capture for the probes which were specific for the A. thaliana sequence. Finally, extraction in the presence of interferences (heterogenous DNA, primary and secondary metabolites, proteins) provided interesting and insightful results. This work illustrates the feasibility and versatility of these probes when coupled to MILs for rapid, cost-effective, and environmentally sensitive sample preparation in the extraction of specific target sequences from different origins. Graphical abstract.
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Affiliation(s)
- Arianna Marengo
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Turin, Italy
| | - Miranda N Emaus
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, IA, 50011, USA
| | - Cinzia M Bertea
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Unità di Fisiologia Vegetale, Università di Torino, via Quarello 15/A, 10135, Turin, Italy
| | - Carlo Bicchi
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Turin, Italy
| | - Patrizia Rubiolo
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Turin, Italy
| | - Cecilia Cagliero
- Dipartimento di Scienza e Tecnologia del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Turin, Italy.
| | - Jared L Anderson
- Department of Chemistry, Iowa State University, 1605 Gilman Hall, Ames, IA, 50011, USA
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A Bacillus-based Coxsackie virus A16 mucosal vaccine induces strong neutralizing antibody responses. Cent Eur J Immunol 2019; 44:1-6. [PMID: 31114430 PMCID: PMC6526588 DOI: 10.5114/ceji.2019.84009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2016] [Accepted: 02/05/2017] [Indexed: 12/17/2022] Open
Abstract
The purpose of this study was to construct a Coxsackie virus A16 (CA16) mucosal vaccine and evaluate its ability to induce immune response. VP1 gene of CA16 was inserted into the genome of Bacillus subtilis via recombination and displayed on the surface of the spores. This Bacillus-based vaccine was used for intranasal immunization of mice and the serum antibody titer was determined by enzyme-linked immunosorbent assay (ELISA). Neutralization activity of the serum from immunized mice was analyzed by an in vitro neutralizing test. VP1 gene was successfully integrated into the genome of Bacillus subtilis and was expressed on the surface of Bacillus spores. Intranasal immunization of mice with this vaccine induced a higher level of VP1 specific IgA and IgG than in mice of the control group (p < 0.05). The neutralizing antibody titer in the spore immunization group was 1 : 169, which was higher than that in the control group (p < 0.05). We concluded that vaccine prepared by displaying CA16 VP1 protein on the surface of Bacillus subtilis spores can stimulate mice to produce protective neutralizing antibodies, which provides foundations for the development of CA16 mucosal vaccine.
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Lv H, Ye L, Liu Q, Li SG, Li T, Huang NL, Gao Y, Fan LB, Du WD. S-S-PEG-COOH Self-Assembled Monolayer on Gold Surface Enabled a Combined Assay for Serological EBV Antibody Isotypes. Proteomics Clin Appl 2018; 13:e1800067. [PMID: 30311429 DOI: 10.1002/prca.201800067] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 09/13/2018] [Indexed: 11/09/2022]
Abstract
PURPOSE Epstein-Barr virus (EBV) is a ubiquitous human gamma herpes virus that infects human epithelial cells and B lymphocytes. It would be potentially valuable to develop novel combined assays to benefit screening for large panels of samples of EBV infectious diseases. EXPERIMENTAL DESIGN A simple antigen-probed biochip that is modified with S-S-PEG-COOH and is used as a label-free high-throughput screening method for a combined detection of EBV capsid antigen IgM antibody, capsid antigen IgG antibody, and nuclear antigen IgG antibody. RESULTS This protein biochip has similar feasibility, sensitivity, and specificity in comparison with Liaison chemiluminescent immunoassay (CLIA). Detection limit of the EBV antibodies by the biochip is almost identical to that by CLIA-L (2.91 U mL-1 vs 3.00 U mL-1 for EBNA-1 IgG, 8 U mL-1 vs10 U mL-1 for EBV-VCA IgG, and 3.5 U mL-1 vs 10 U mL-1 for EBV-VCA IgM). Tests of the three serological antibodies against EBV by the biochip are consistent with the CLIA-L method in 274 clinical sera, respectively. Finally, the combined biochip is successfully utilized for diagnostic identification of EBV infection in 14 patients with infectious mononucleosis (IM) and 25 patients with systemic lupus erythematosus SLE, as well as additional 10 known real-time PCR positive patients. CONCLUSIONS AND CLINICAL RELEVANCE This biochip format will enable concurrent detection of antibodies against EBV infection and confirm infection status of EBV. It will be a versatile tool for large-scale epidemiological screening in view of its miniaturization and high throughput.
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Affiliation(s)
- Hui Lv
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Lei Ye
- Department of Pathology, Anhui Medical University, Hefei, 230032, China
| | - Qian Liu
- Department of Pathology, Anhui Medical University, Hefei, 230032, China
| | - Song-Guo Li
- Department of Pathology, Anhui Medical University, Hefei, 230032, China
| | - Tao Li
- Department of Clinical Laboratory, The First Affiliated Hospital, Anhui Medical University, Hefei, 230022, China
| | - Na-Li Huang
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Yi Gao
- Department of Pathology, Anhui Medical University, Hefei, 230032, China
| | - Li-Bin Fan
- Department of Biology, School of Life Sciences, Anhui Medical University, Hefei, 230032, China
| | - Wei-Dong Du
- Department of Pathology, Anhui Medical University, Hefei, 230032, China
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Tian H, Zhang Y, Shi Y, Li X, Sun Q, Liu L, Zhao D, Xu B. Epidemiological and aetiological characteristics of hand, foot, and mouth disease in Shijiazhuang City, Hebei province, China, 2009-2012. PLoS One 2017; 12:e0176604. [PMID: 28486500 PMCID: PMC5423607 DOI: 10.1371/journal.pone.0176604] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 04/13/2017] [Indexed: 12/18/2022] Open
Abstract
Large outbreaks of hand, foot, and mouth disease (HFMD) have repeatedly occurred in mainland of China since 2007. In this study, we investigated the epidemiological and aetiological characteristics of HFMD in Shijiazhuang City, one of the biggest northern cities of China. A total of 57,173 clinical HFMD cases, including 911 severe and 32 fatal cases, were reported in Shijiazhuang City during 2009–2012. The disease incidence peaked during March–July, with a small increase in the number of cases observed in November of each year. Seventeen potential HFMD-causing enterovirus serotypes were detected, with the most frequent serotypes being EV-A71 and CV-A16. CV-A10 was also a frequently detected causative serotype, and was associated with the second largest number of severe HFMD cases, following EV-A71. Phylogenetic analysis revealed that all EV-A71, CV-A16 and CV-A10 strains from Shijiazhuang City had co-evolved and co-circulated with those from other Chinese provinces. Our findings underscore the need for enhanced surveillance and molecular detection for HFMD, and suggest that EV-A71 vaccination may be an effective intervention strategy for HFMD prevention and vaccines against CV-A10 and CV-A16 are also urgently needed.
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Affiliation(s)
- Huifang Tian
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang City, Hebei Province, People’s Republic of China
- * E-mail:
| | - Yong Zhang
- WHO WPRO Regional Polio Reference Laboratory and Key Laboratory for Medical Virology, National Health and Family Planning Commission of China; National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People’s Republic of China
| | - Yan Shi
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang City, Hebei Province, People’s Republic of China
| | - Xiujuan Li
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang City, Hebei Province, People’s Republic of China
| | - Qiang Sun
- WHO WPRO Regional Polio Reference Laboratory and Key Laboratory for Medical Virology, National Health and Family Planning Commission of China; National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, People’s Republic of China
| | - Li Liu
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang City, Hebei Province, People’s Republic of China
| | - Dong Zhao
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang City, Hebei Province, People’s Republic of China
| | - Baohong Xu
- Shijiazhuang Center for Disease Control and Prevention, Shijiazhuang City, Hebei Province, People’s Republic of China
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He H, Li R, Chen Y, Pan P, Tong W, Dong X, Chen Y, Yu D. Integrated DNA and RNA extraction using magnetic beads from viral pathogens causing acute respiratory infections. Sci Rep 2017; 7:45199. [PMID: 28332631 PMCID: PMC5362898 DOI: 10.1038/srep45199] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 02/22/2017] [Indexed: 12/20/2022] Open
Abstract
Current extraction methods often extract DNA and RNA separately, and few methods are capable of co-extracting DNA and RNA from sputum. We established a nucleic acid co-extraction method from sputum based on magnetic beads and optimized the method by evaluating influencing factors, such as the guanidinium thiocyanate (GTC) and dithiothreitol (DTT) concentrations, magnetic bead amount, incubation temperature, lysis buffer pH and RNA carrier type. The feasibility of the simultaneous nucleic acid co-extraction method was evaluated by amplifying DNA and RNA viruses from a single clinical specimen with a multiplex RT-qPCR method. Both DNA and RNA were most efficiently extracted when the GTC and DTT concentrations were 2.0 M and 80 mM, respectively, 20 μl magnetic beads were added, the incubation temperature was 80 °C, the pH was 8 or 9, and RNA carrier A was used. Therefore, we established a simple method to extract nucleic acids from two important respiratory viruses compared with other commercial kits. This magnetic beads-based co-extraction method for sputum followed by a multiplex RT-qPCR can rapidly and precisely detect DNA and RNA viruses from a single clinical specimen and has many advantages, such as decreased time, low cost, and a lack of harmful chemicals.
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Affiliation(s)
- Hui He
- The Affiliated First Hospital of Hangzhou, Zhejiang Chinese Medical University, Hangzhou, China.,Department of Pathology, Zhoushan Hospital, Zhoushan, Zhejiang Province, China
| | - Rongqun Li
- College of Basic Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Yi Chen
- The Affiliated First Hospital of Hangzhou, Zhejiang Chinese Medical University, Hangzhou, China.,Department of Clinical Laboratory, Hangzhou First People's Hospital, Hangzhou, China
| | - Ping Pan
- The Affiliated First Hospital of Hangzhou, Zhejiang Chinese Medical University, Hangzhou, China.,Department of Clinical Laboratory, Hangzhou First People's Hospital, Hangzhou, China
| | - Wenjuan Tong
- Department of Clinical Laboratory, Hangzhou First People's Hospital, Hangzhou, China
| | - Xueyan Dong
- Department of Clinical Laboratory, Hangzhou First People's Hospital, Hangzhou, China
| | - Yueming Chen
- Department of Clinical Laboratory, Hangzhou First People's Hospital, Hangzhou, China
| | - Daojun Yu
- The Affiliated First Hospital of Hangzhou, Zhejiang Chinese Medical University, Hangzhou, China.,Department of Clinical Laboratory, Hangzhou First People's Hospital, Hangzhou, China
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Papa A, Kotrotsiou T, Papadopoulou E, Reusken C, GeurtsvanKessel C, Koopmans M. Challenges in laboratory diagnosis of acute viral central nervous system infections in the era of emerging infectious diseases: the syndromic approach. Expert Rev Anti Infect Ther 2016; 14:829-36. [PMID: 27458693 DOI: 10.1080/14787210.2016.1215914] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION Many acute viral infections of the central nervous system (CNS) remain without etiological diagnosis. Specific treatment is available for only few of them; however, accurate diagnosis is essential for patient's life and public health. AREAS COVERED In the current article, the main parameters playing a role for a successful etiological diagnosis of acute CNS infections are analysed and the syndromic approach based on clinical and demographic data combined with surrogated indicators is discussed. For the development of a relevant test panel, knowledge on the microbes causing CNS infections in a particular geographic region is essential. The modern screening strategies covering a large panel of potential causative agents are described. Examples of the successful application of next generation sequencing in the identification of etiological agents, including novel and emerging viruses, are given. Expert commentary: Knowledge on epidemiology of the viruses, expertise on syndromic grouping of the etiological agents and advances in technology enable the laboratory diagnosis of acute CNS infections, and the rapid identification, containment and mitigation of probable outbreaks.
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Affiliation(s)
- Anna Papa
- a Department of Microbiology, Medical School , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Tzimoula Kotrotsiou
- a Department of Microbiology, Medical School , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Elpida Papadopoulou
- a Department of Microbiology, Medical School , Aristotle University of Thessaloniki , Thessaloniki , Greece
| | - Chantal Reusken
- b Viroscience Department , Erasmus Medical Centre , Rotterdam , The Netherlands
| | | | - Marion Koopmans
- b Viroscience Department , Erasmus Medical Centre , Rotterdam , The Netherlands
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