1
|
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: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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
| |
Collapse
|
2
|
Liang C, van Dijk JP, Scholtens IM, Staats M, Prins TW, Voorhuijzen MM, da Silva AM, Arisi AC, den Dunnen JT, Kok EJ. Detecting authorized and unauthorized genetically modified organisms containing vip3A by real-time PCR and next-generation sequencing. Anal Bioanal Chem 2014; 406:2603-11. [PMID: 24553665 DOI: 10.1007/s00216-014-7667-1] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/23/2014] [Accepted: 01/27/2014] [Indexed: 11/27/2022]
Abstract
The growing number of biotech crops with novel genetic elements increasingly complicates the detection of genetically modified organisms (GMOs) in food and feed samples using conventional screening methods. Unauthorized GMOs (UGMOs) in food and feed are currently identified through combining GMO element screening with sequencing the DNA flanking these elements. In this study, a specific and sensitive qPCR assay was developed for vip3A element detection based on the vip3Aa20 coding sequences of the recently marketed MIR162 maize and COT102 cotton. Furthermore, SiteFinding-PCR in combination with Sanger, Illumina or Pacific BioSciences (PacBio) sequencing was performed targeting the flanking DNA of the vip3Aa20 element in MIR162. De novo assembly and Basic Local Alignment Search Tool searches were used to mimic UGMO identification. PacBio data resulted in relatively long contigs in the upstream (1,326 nucleotides (nt); 95 % identity) and downstream (1,135 nt; 92 % identity) regions, whereas Illumina data resulted in two smaller contigs of 858 and 1,038 nt with higher sequence identity (>99 % identity). Both approaches outperformed Sanger sequencing, underlining the potential for next-generation sequencing in UGMO identification.
Collapse
|
3
|
Bashalkhanov S, Rajora OP. Protocol: A high-throughput DNA extraction system suitable for conifers. Plant Methods 2008; 4:20. [PMID: 18673554 PMCID: PMC2518145 DOI: 10.1186/1746-4811-4-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2008] [Accepted: 08/01/2008] [Indexed: 05/26/2023]
Abstract
BACKGROUND High throughput DNA isolation from plants is a major bottleneck for most studies requiring large sample sizes. A variety of protocols have been developed for DNA isolation from plants. However, many species, including conifers, have high contents of secondary metabolites that interfere with the extraction process or the subsequent analysis steps. Here, we describe a procedure for high-throughput DNA isolation from conifers. RESULTS We have developed a high-throughput DNA extraction protocol for conifers using an automated liquid handler and modifying the Qiagen MagAttract Plant Kit protocol. The modifications involve change to the buffer system and improving the protocol so that it almost doubles the number of samples processed per kit, which significantly reduces the overall costs. We describe two versions of the protocol: one for medium-throughput (MTP) and another for high-throughput (HTP) DNA isolation. The HTP version works from start to end in the industry-standard 96-well format, while the MTP version provides higher DNA yields per sample processed. We have successfully used the protocol for DNA extraction and genotyping of thousands of individuals of several spruce and a pine species. CONCLUSION A high-throughput system for DNA extraction from conifer needles and seeds has been developed and validated. The quality of the isolated DNA was comparable with that obtained from two commonly used methods: the silica-spin column and the classic CTAB protocol. Our protocol provides a fully automatable and cost effective solution for processing large numbers of conifer samples.
Collapse
Affiliation(s)
- Stanislav Bashalkhanov
- Faculty of Forestry and Environmental Management, University of New Brunswick, 28 Dineen Drive, Fredericton, New Brunswick, E3B 6C2, Canada
| | - Om P Rajora
- Faculty of Forestry and Environmental Management, University of New Brunswick, 28 Dineen Drive, Fredericton, New Brunswick, E3B 6C2, Canada
| |
Collapse
|
4
|
Vuosku J, Jokela A, Läärä E, Sääskilahti M, Muilu R, Sutela S, Altabella T, Sarjala T, Häggman H. Consistency of polyamine profiles and expression of arginine decarboxylase in mitosis during zygotic embryogenesis of Scots pine. Plant Physiol 2006; 142:1027-38. [PMID: 16963525 PMCID: PMC1630739 DOI: 10.1104/pp.106.083030] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2006] [Accepted: 09/05/2006] [Indexed: 05/11/2023]
Abstract
In this study, we show that both arginine decarboxylase (ADC) protein and mRNA transcript are present at different phases of mitosis in Scots pine (Pinus sylvestris) zygotic embryogenesis. We also examined the consistency of polyamine (PA) profiles with the effective temperature sum, the latter indicating the developmental stage of the embryos. PA metabolism was analyzed by fitting statistical regression models to the data of free and soluble conjugated PAs, to the enzyme activities of ADC and ornithine decarboxylase (ODC), as well as to the gene expression of ADC. According to the fitted models, PAs typically had the tendency to increase at the early stages but decrease at the late stages of embryogenesis. Only the free putrescine fraction remained stable during embryo development. The PA biosynthesis strongly preferred the ADC pathway. Both ADC gene expression and ADC enzyme activity were substantially higher than putative ODC gene expression or ODC enzyme activity, respectively. ADC gene expression and enzyme activity increased during embryogenesis, which suggests the involvement of transcriptional regulation in the expression of ADC. Both ADC mRNA and ADC protein localized in dividing cells of embryo meristems and more specifically within the mitotic spindle apparatus and close to the chromosomes, respectively. The results suggest the essential role of ADC in the mitosis of plant cells.
Collapse
Affiliation(s)
- Jaana Vuosku
- Department of Biology , University of Oulu, 90014 Oulu, Finland.
| | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Berensmeier S. Magnetic particles for the separation and purification of nucleic acids. Appl Microbiol Biotechnol 2006; 73:495-504. [PMID: 17063328 PMCID: PMC7080036 DOI: 10.1007/s00253-006-0675-0] [Citation(s) in RCA: 302] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2006] [Revised: 09/04/2006] [Accepted: 09/12/2006] [Indexed: 11/16/2022]
Abstract
Nucleic acid separation is an increasingly important tool for molecular biology. Before modern technologies could be used, nucleic acid separation had been a time- and work-consuming process based on several extraction and centrifugation steps, often limited by small yields and low purities of the separation products, and not suited for automation and up-scaling. During the last few years, specifically functionalised magnetic particles were developed. Together with an appropriate buffer system, they allow for the quick and efficient purification directly after their extraction from crude cell extracts. Centrifugation steps were avoided. In addition, the new approach provided for an easy automation of the entire process and the isolation of nucleic acids from larger sample volumes. This review describes traditional methods and methods based on magnetic particles for nucleic acid purification. The synthesis of a variety of magnetic particles is presented in more detail. Various suppliers of magnetic particles for nucleic acid separation as well as suppliers offering particle-based kits for a variety of different sample materials are listed. Furthermore, commercially available manual magnetic separators and automated systems for magnetic particle handling and liquid handling are mentioned.
Collapse
Affiliation(s)
- Sonja Berensmeier
- Forschungszentrum Karlsruhe, Institute for Technical Chemistry, Water Technology and Geotechnology Division, Hermann-v.-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
| |
Collapse
|