CN116334317B - 一种核糖核酸生物传感器及其制备方法 - Google Patents
一种核糖核酸生物传感器及其制备方法 Download PDFInfo
- Publication number
- CN116334317B CN116334317B CN202310603983.7A CN202310603983A CN116334317B CN 116334317 B CN116334317 B CN 116334317B CN 202310603983 A CN202310603983 A CN 202310603983A CN 116334317 B CN116334317 B CN 116334317B
- Authority
- CN
- China
- Prior art keywords
- weight
- ribonucleic acid
- biosensor
- parts
- gold electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229920002477 rna polymer Polymers 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010931 gold Substances 0.000 claims abstract description 17
- 229910052737 gold Inorganic materials 0.000 claims abstract description 17
- 239000000523 sample Substances 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 12
- VWWQXMAJTJZDQX-UYBVJOGSSA-N flavin adenine dinucleotide Chemical compound C1=NC2=C(N)N=CN=C2N1[C@@H]([C@H](O)[C@@H]1O)O[C@@H]1CO[P@](O)(=O)O[P@@](O)(=O)OC[C@@H](O)[C@@H](O)[C@@H](O)CN1C2=NC(=O)NC(=O)C2=NC2=C1C=C(C)C(C)=C2 VWWQXMAJTJZDQX-UYBVJOGSSA-N 0.000 claims abstract description 12
- 235000019162 flavin adenine dinucleotide Nutrition 0.000 claims abstract description 12
- 239000011714 flavin adenine dinucleotide Substances 0.000 claims abstract description 12
- 229940093632 flavin-adenine dinucleotide Drugs 0.000 claims abstract description 12
- -1 6-aminohexyl Chemical group 0.000 claims abstract description 9
- 101710163270 Nuclease Proteins 0.000 claims abstract description 9
- 150000001718 carbodiimides Chemical class 0.000 claims abstract description 8
- GVJXGCIPWAVXJP-UHFFFAOYSA-N 2,5-dioxo-1-oxoniopyrrolidine-3-sulfonate Chemical compound ON1C(=O)CC(S(O)(=O)=O)C1=O GVJXGCIPWAVXJP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 108091034117 Oligonucleotide Proteins 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 24
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 15
- 239000008103 glucose Substances 0.000 claims description 15
- 101710088194 Dehydrogenase Proteins 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 239000013614 RNA sample Substances 0.000 claims description 9
- 108010002687 Survivin Proteins 0.000 claims description 6
- 238000012258 culturing Methods 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000008055 phosphate buffer solution Substances 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 4
- CCMKPCBRNXKTKV-UHFFFAOYSA-N 1-hydroxy-5-sulfanylidenepyrrolidin-2-one Chemical compound ON1C(=O)CCC1=S CCMKPCBRNXKTKV-UHFFFAOYSA-N 0.000 claims description 2
- 102000000763 Survivin Human genes 0.000 claims 2
- 108010050375 Glucose 1-Dehydrogenase Proteins 0.000 abstract description 11
- 238000000835 electrochemical detection Methods 0.000 abstract description 4
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 241000711573 Coronaviridae Species 0.000 description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- 108091091807 let-7a stem-loop Proteins 0.000 description 5
- 108091057746 let-7a-4 stem-loop Proteins 0.000 description 5
- 108091028376 let-7a-5 stem-loop Proteins 0.000 description 5
- 108091024393 let-7a-6 stem-loop Proteins 0.000 description 5
- 108091091174 let-7a-7 stem-loop Proteins 0.000 description 5
- 102100021663 Baculoviral IAP repeat-containing protein 5 Human genes 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 239000007853 buffer solution Substances 0.000 description 4
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 4
- 102100031181 Glyceraldehyde-3-phosphate dehydrogenase Human genes 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 108020004445 glyceraldehyde-3-phosphate dehydrogenase Proteins 0.000 description 3
- 108020004999 messenger RNA Proteins 0.000 description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 239000000427 antigen Substances 0.000 description 2
- 102000036639 antigens Human genes 0.000 description 2
- 108091007433 antigens Proteins 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 238000003752 polymerase chain reaction Methods 0.000 description 2
- 238000003753 real-time PCR Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229930024421 Adenine Natural products 0.000 description 1
- GFFGJBXGBJISGV-UHFFFAOYSA-N Adenine Chemical compound NC1=NC=NC2=C1N=CN2 GFFGJBXGBJISGV-UHFFFAOYSA-N 0.000 description 1
- JLCPHMBAVCMARE-UHFFFAOYSA-N [3-[[3-[[3-[[3-[[3-[[3-[[3-[[3-[[3-[[3-[[3-[[5-(2-amino-6-oxo-1H-purin-9-yl)-3-[[3-[[3-[[3-[[3-[[3-[[5-(2-amino-6-oxo-1H-purin-9-yl)-3-[[5-(2-amino-6-oxo-1H-purin-9-yl)-3-hydroxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxyoxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(4-amino-2-oxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(4-amino-2-oxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(4-amino-2-oxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(4-amino-2-oxopyrimidin-1-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(6-aminopurin-9-yl)oxolan-2-yl]methoxy-hydroxyphosphoryl]oxy-5-(4-amino-2-oxopyrimidin-1-yl)oxolan-2-yl]methyl [5-(6-aminopurin-9-yl)-2-(hydroxymethyl)oxolan-3-yl] hydrogen phosphate Polymers Cc1cn(C2CC(OP(O)(=O)OCC3OC(CC3OP(O)(=O)OCC3OC(CC3O)n3cnc4c3nc(N)[nH]c4=O)n3cnc4c3nc(N)[nH]c4=O)C(COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3COP(O)(=O)OC3CC(OC3CO)n3cnc4c(N)ncnc34)n3ccc(N)nc3=O)n3cnc4c(N)ncnc34)n3ccc(N)nc3=O)n3ccc(N)nc3=O)n3ccc(N)nc3=O)n3cnc4c(N)ncnc34)n3cnc4c(N)ncnc34)n3cc(C)c(=O)[nH]c3=O)n3cc(C)c(=O)[nH]c3=O)n3ccc(N)nc3=O)n3cc(C)c(=O)[nH]c3=O)n3cnc4c3nc(N)[nH]c4=O)n3cnc4c(N)ncnc34)n3cnc4c(N)ncnc34)n3cnc4c(N)ncnc34)n3cnc4c(N)ncnc34)O2)c(=O)[nH]c1=O JLCPHMBAVCMARE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229960000643 adenine Drugs 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 230000022811 deglycosylation Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/70—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving virus or bacteriophage
- C12Q1/701—Specific hybridization probes
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6813—Hybridisation assays
- C12Q1/6816—Hybridisation assays characterised by the detection means
- C12Q1/6825—Nucleic acid detection involving sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/327—Biochemical electrodes, e.g. electrical or mechanical details for in vitro measurements
- G01N27/3275—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction
- G01N27/3277—Sensing specific biomolecules, e.g. nucleic acid strands, based on an electrode surface reaction being a redox reaction, e.g. detection by cyclic voltammetry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Molecular Biology (AREA)
- Wood Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Zoology (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- Biophysics (AREA)
- Genetics & Genomics (AREA)
- Virology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明公开了一种核糖核酸生物传感器及其制备方法,制备方法包括如下步骤:1)将金电极在硫醇化寡核苷酸的捕获探针溶液中培养;2)将培养后的金电极、100~500重量份的N6‑(6‑氨基己基)黄素腺嘌呤二核苷酸、40~200重量份的碳化二亚胺和5~50重量份的N‑羟基硫代琥珀酰亚胺进行混合反应,反应结束后,清洗金电极,得到生物传感器。本发明研制出了基于电化学检测的高灵敏度核糖核酸生物传感器,通过室温条件下核酸酶和葡萄糖脱氢酶的协同放大,提高了检测的灵敏度。
Description
技术领域
本发明涉及一种核糖核酸生物传感器及其制备方法。
背景技术
目前有两种主要的新型冠状病毒检测方法:抗原检测和以聚合酶链反应 (PCR)为基础的实时荧光定量PCR。抗原检测以其快速方便等特点,非常适合家庭自检,但是,现阶段只能作为一种辅助手段。新型冠状病毒检测的“黄金标准”是实时荧光定量PCR,其严苛的样品处理和检测设备要求,使新型冠状病毒检测只能在基础设施完善的中心实验室进行。另外,电化学检测和电化学生物传感器以其体积小、响应快、使用方便等特点非常适合家庭自检,如血糖仪,但是其灵敏度需要得到大大的提高。
发明内容
在一个方面,本发明提供了如下技术方案:一种核糖核酸生物传感器的制备方法,包括如下步骤:
1)将金电极在硫醇化寡核苷酸的捕获探针溶液中培养2~24小时;
2)将培养后的金电极、100~500重量份的N6-(6-氨基己基)黄素腺嘌呤二核苷酸、40~200重量份的碳化二亚胺和5~50重量份的N-羟基硫代琥珀酰亚胺进行混合反应1~10小时,反应结束后,清洗金电极,得到生物传感器;
在检测时,将所述生物传感器放入0.000001~0.0001重量份的总核糖核酸样品溶液中,于20~30℃条件下培养10~60分钟,培养结束后,得到生物传感器A,将生物传感器A在含有0.000001~0.00005重量份的Surveyor®和0.000001~0.00005重量份的核酸酶I的磷酸缓冲溶液中培养5~30分钟,温度为20~40℃,得到生物传感器B;最后,将生物传感器B放入含有50~500mmol/L的葡萄糖和0.01~0.5重量份的去辅基葡萄糖脱氢酶中进行检测葡萄糖的电化学催化氧化电流。
作为优选,所述捕获探针包括5’-SH-AACTATACAACCTACTACCTCA-COOH-3’、 5’-SH-TTACTCCTTGGAGGCCATGTAGG-COOH-3’、或5’-SH-TTGCTGCTGCTTGACAGATT-COOH-3’。
作为优选,在步骤1)中,所述金电极的直径为0.2~5mm。
作为优选,在步骤2)中,所述N6-(6-氨基己基)黄素腺嘌呤二核苷酸,150~300重量份;所述碳化二亚胺,80~150重量份;所述N-羟基硫代琥珀酰亚胺,10~30重量份。
作为优选,所述总核糖核酸样品溶液,0.00001~0.00005重量份。
作为优选,所述Surveyor®,0.000005~0.00002重量份;所述核酸酶I,0.000005~0.00002重量份。
作为优选,所述葡萄糖的浓度为80~150mmol/L;所述去辅基葡萄糖脱氢酶,0.05~0.3重量份。
在另一个方面,上述所述的核糖核酸生物传感器的制备方法所制备的核糖核酸生物传感器。
在另一个方面,上述所述的核糖核酸生物传感器在检测新型冠状病毒中的应用。
本发明成功地研制出了基于电化学检测的高灵敏度核糖核酸生物传感器,通过室温条件下葡萄糖脱氢酶和电化学催化的协同放大,使检测灵敏度大大提高。
附图说明
图1为含有重组葡萄糖脱氢酶的核糖核酸生物传感器的结构示意图;
图2为核糖核酸生物传感器的工作原理图;
图3为电流响应曲线和工作曲线图;A为微核糖核酸let-7a生物传感器在0纳克(曲线1)和25纳克(曲线2)总核糖核酸中的电流响应曲线;B为微核糖核酸let-7a生物传感器的工作曲线图;
图4为GAPDH信使核糖核酸生物传感器在0纳克(曲线1)和25纳克(曲线2)总核糖核酸中的电流响应曲线;
图5为新型冠状病毒核糖核酸生物传感器在0纳克(曲线1)和25纳克(曲线2)总核糖核酸中的电流响应曲线。
具体实施方式
参照附图对本发明做进一步说明。
首先我们对葡萄糖脱氢酶进行去辅基化。具体做法是:将100~5000重量份的葡萄糖脱氢酶溶于pH 4.5的0.1M的醋酸缓冲溶液中,然后将该溶液倒入透析袋中,切割分子量:500~30000,在1~20℃条件下,于1~4.5M的溴化钾中透析24~150小时,然后在pH7.0的0.005~0.1M磷酸缓冲溶液中透析12~72小时。
本实施例公开了一种核糖核酸生物传感器的制备方法,包括如下步骤:
1)将金电极在0.01~0.5重量份的硫醇化寡核苷酸(还携带有末端羧基)的捕获探针溶液中培养2~24小时,用水清洗1~5次;金电极的直径为0.2~5毫米;
2)将培养后的金电极、100~500重量份的N6-(6-氨基己基)黄素腺嘌呤二核苷酸、40~200重量份的碳化二亚胺和5~50重量份的N-羟基硫代琥珀酰亚胺进行混合反应1~10小时,反应结束后,用磷酸缓冲溶液清洗金电极1~5次,得到生物传感器;优选的,N6-(6-氨基己基)黄素腺嘌呤二核苷酸,150~300重量份;碳化二亚胺,80~150重量份;N-羟基硫代琥珀酰亚胺,10~30重量份;
在检测时,将生物传感器放入0.000001-0.0001重量份的总核糖核酸样品溶液中,于20~30℃条件下培养10~60分钟,培养结束后,得到生物传感器A,将生物传感器A在含有0.000001~0.00005重量份的Surveyor®和0.000001~0.00005重量份的核酸酶I的磷酸缓冲溶液中培养5~30分钟,温度为20~40℃,得到生物传感器B;最后,将生物传感器B放入含有50~500mmol/L的葡萄糖和0.01~0.5重量份的去辅基葡萄糖脱氢酶中进行检测葡萄糖的电化学催化氧化电流。优选的,总核糖核酸样品溶液,0.00001-0.00005重量份;Surveyor®,0.000005~0.00002重量份;核酸酶I,0.000005~0.00002重量份;葡萄糖的浓度为80~150mmol/L;去辅基葡萄糖脱氢酶,0.05~0.3重量份。
上述技术方案中,捕获探针包括5’-SH-AACTATACAACCTACTACCTCA-COOH-3’、 5’-SH-TTACTCCTTGGAGGCCATGTAGG-COOH-3’、或5’-SH-TTGCTGCTGCTTGACAGATT-COOH-3’。
上述所述的核糖核酸生物传感器的制备方法所制备的核糖核酸生物传感器。
上述所述的核糖核酸生物传感器在检测新型冠状病毒中的应用。具体实施例如下所示:
对葡萄糖脱氢酶进行去辅基化:将1g的葡萄糖脱氢酶溶于pH4.5的0.1M的醋酸缓冲溶液中,然后将该溶液倒入透析袋中,切割分子量为10000,在4℃环境中,在3M的溴化钾中透析96小时,然后在pH7.0的0.05M磷酸缓冲溶液中透析48小时。
核糖核酸生物传感器的制备:金电极(1毫米直径)在0.05mg的硫醇化寡核苷酸(还携带末端羧基)捕获探针溶液中培养12小时后,用水清洗3次,然后放入200mg的N6-(6-氨基己基)黄素腺嘌呤二核苷酸,100mg的碳化二亚胺和25mg的N-羟基硫代琥珀酰亚胺,在摇床上4℃反应4小时,反应完成后,电极用pH7.0的0.05M磷酸缓冲溶液清洗3次。经过上述处理后,N6-(6-氨基己基)黄素腺嘌呤二核苷酸偶联在了寡核苷酸上,制成核糖核酸生物传感器。其工作原理如图2所示。在传感器上的捕获探针与核糖核酸样品杂交以后,多余的没有杂交的捕获探针被核酸酶I消化掉,与捕获探针错配的核糖核酸被Surveyor®消化掉,在传感器上只剩下完全匹配的核糖核酸,当将此生物传感器放入含有葡萄糖和去辅基葡萄糖脱氢酶溶液中时,捕获探针末端的黄素腺嘌呤二核苷酸辅基与去辅基葡萄糖脱氢酶重组,嵌入到去辅基葡萄糖脱氢酶中,使其还原为原始的葡萄糖脱氢酶;然后,在外加电压下,与金电极进行直接的电子交换,产生与核糖核酸浓度有直接关系的葡萄糖氧化电流,如图1所示。
核糖核酸的检测:将 5’-SH-AACTATACAACCTACTACCTCA-COOH-3作为捕获探针(序列:AACTATACAACCTACTACCTCA,记为SEQ ID NO 1),制成核糖核酸生物传感器,这个生物传感器就成了对微核糖核酸let-7a具有高度选择性和灵敏性的生物传感器。将此生物传感器在25纳克的总核糖核酸样品溶液中,在25℃条件下培养30分钟,然后在含有10纳克Surveyor®和10纳克的核酸酶I的0.05mol/L的pH7.4的磷酸缓冲溶液中,在30℃条件下培养10分钟,最后,将处理过的生物传感器放入含有100mmol/L的葡萄糖和0.1mg的去辅基葡萄糖脱氢酶中,捕获探针末端的黄素腺嘌呤二核苷酸辅基与去辅基葡萄糖脱氢酶重组,嵌入到去辅基葡萄糖脱氢酶中,使其还原为原始的葡萄糖脱氢酶,实现葡萄糖脱氢酶的直接电化学,电化学催化葡萄糖的氧化,在100mV检测葡萄糖的电化学催化氧化电流 (如图3中A部分所示)。
实验发现,这个微核糖核酸let-7a生物传感器的电流信号与10~200纳克总核糖核酸样品中的微核糖核酸let-7a成线性关系(如图3中B部分所示)。
若将5’-SH-TTACTCCTTGGAGGCCATGTAGG-COOH-3’ (序列:TTACTCCTTGGAGGCCATGTAGG,记为SEQ ID NO 2)做为捕获探针,经过上述处理后,得到GAPDH信使核糖核酸生物传感器,对GAPDH信使核糖核酸具有非常灵敏的响应(如图4所示)。
最后,若将5’-SH-TTGCTGCTGCTTGACAGATT-COOH-3’ (序列:TTGCTGCTGCTTGACAGATT,记为SEQ ID NO 3)做为捕获探针,经过上述处理后,得到新型冠状病毒核糖核酸生物传感器,总核糖核酸中的新型冠状病毒的核糖核酸可以被检出(如图5所示)。
以上所述仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (8)
1.一种核糖核酸生物传感器的制备方法,其特征是:包括如下步骤:
1)将金电极在硫醇化寡核苷酸的捕获探针溶液中培养2~24小时;
2)将培养后的金电极、100~500重量份的N6-(6-氨基己基)黄素腺嘌呤二核苷酸、40~200重量份的碳化二亚胺和5~50重量份的N-羟基硫代琥珀酰亚胺进行混合反应1~10小时,反应结束后,清洗金电极,得到生物传感器;
在检测时,将所述生物传感器放入0.000001~0.0001重量份的总核糖核酸样品溶液中,于20~30℃条件下培养10~60分钟,培养结束后,得到生物传感器A,将生物传感器A在含有0.000001~0.00005重量份的Surveyor®和0.000001~0.00005重量份的核酸酶I的磷酸缓冲溶液中培养5~30分钟,温度为20~40℃,得到生物传感器B;最后,将生物传感器B放入含有50~500mmol/L的葡萄糖和0.01~0.5重量份的去辅基葡萄糖脱氢酶中进行检测葡萄糖的电化学催化氧化电流。
2.根据权利要求1所述的核糖核酸生物传感器的制备方法,其特征是:所述捕获探针包括5’-SH-AACTATACAACCTACTACCTCA-COOH-3’、 5’-SH-TTACTCCTTGGAGGCCATGTAGG-COOH-3’或5’-SH-TTGCTGCTGCTTGACAGATT-COOH-3’。
3.根据权利要求1所述的核糖核酸生物传感器的制备方法,其特征是:在步骤1)中,所述金电极的直径为0.2~5mm。
4.根据权利要求3所述的核糖核酸生物传感器的制备方法,其特征是:在步骤2)中,所述N6-(6-氨基己基)黄素腺嘌呤二核苷酸,150~300重量份;所述碳化二亚胺,80~150重量份;所述N-羟基硫代琥珀酰亚胺,10~30重量份。
5.根据权利要求4所述的核糖核酸生物传感器的制备方法,其特征是:所述总核糖核酸样品溶液,0.00001~0.00005重量份。
6.根据权利要求5所述的核糖核酸生物传感器的制备方法,其特征是:所述Surveyor®,0.000005~0.00002重量份;所述核酸酶I,0.000005~0.00002重量份。
7.根据权利要求6所述的核糖核酸生物传感器的制备方法,其特征是:所述葡萄糖的浓度为80~150mmol/L;所述去辅基葡萄糖脱氢酶,0.05~0.3重量份。
8.权利要求1~7中任一项所述的核糖核酸生物传感器的制备方法所制备的核糖核酸生物传感器。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310603983.7A CN116334317B (zh) | 2023-05-26 | 2023-05-26 | 一种核糖核酸生物传感器及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202310603983.7A CN116334317B (zh) | 2023-05-26 | 2023-05-26 | 一种核糖核酸生物传感器及其制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN116334317A CN116334317A (zh) | 2023-06-27 |
CN116334317B true CN116334317B (zh) | 2023-08-08 |
Family
ID=86880707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202310603983.7A Active CN116334317B (zh) | 2023-05-26 | 2023-05-26 | 一种核糖核酸生物传感器及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN116334317B (zh) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114088790A (zh) * | 2022-01-19 | 2022-02-25 | 苏州中星医疗技术有限公司 | 葡萄糖生物传感膜、葡萄糖氧化酶及其制备方法 |
CN114606210A (zh) * | 2022-03-17 | 2022-06-10 | 苏州中星医疗技术有限公司 | 葡萄糖传感器、葡萄糖脱氢酶及其制备方法 |
CN115236158A (zh) * | 2022-09-21 | 2022-10-25 | 苏州中星医疗技术有限公司 | 葡萄糖生物传感器、MXene纳米片及其制备方法 |
-
2023
- 2023-05-26 CN CN202310603983.7A patent/CN116334317B/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114088790A (zh) * | 2022-01-19 | 2022-02-25 | 苏州中星医疗技术有限公司 | 葡萄糖生物传感膜、葡萄糖氧化酶及其制备方法 |
CN114606210A (zh) * | 2022-03-17 | 2022-06-10 | 苏州中星医疗技术有限公司 | 葡萄糖传感器、葡萄糖脱氢酶及其制备方法 |
CN115236158A (zh) * | 2022-09-21 | 2022-10-25 | 苏州中星医疗技术有限公司 | 葡萄糖生物传感器、MXene纳米片及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
CN116334317A (zh) | 2023-06-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN110274941B (zh) | 利用DSN酶和DNAzyme的DNA自组装电化学生物传感器的制备方法 | |
Tao et al. | A new mode for highly sensitive and specific detection of DNA based on exonuclease III-assisted target recycling amplification and mismatched catalytic hairpin assembly | |
US9335292B2 (en) | Electrochemical proximity assay | |
CN111440851B (zh) | 一种检测miRNA的电化学生物传感器及其制备方法与应用 | |
Yuan et al. | A novel “signal on-off-super on” sandwich-type aptamer sensor of CRISPR-Cas12a coupled voltage enrichment assay for VEGF detection | |
CN108398406B (zh) | 一种检测尿嘧啶糖基化酶(udg)的生物传感器及其应用 | |
Miao et al. | Nuclease assisted target recycling and spherical nucleic acids gold nanoparticles recruitment for ultrasensitive detection of microRNA | |
CN113686934A (zh) | 一种CRISPR/Cas12a-RCA电化学传感器检测体系及其应用 | |
CN105385753A (zh) | 基于核酸适配体检测水胺硫磷的电化学传感器及其制备方法 | |
CN116334317B (zh) | 一种核糖核酸生物传感器及其制备方法 | |
CN111474224B (zh) | 一种检测痕量卡那霉素的可再生电化学传感器及其制备方法与应用 | |
CN102220417A (zh) | 基于磁原位扩增的电化学发光基因传感器检测食品致病菌的方法 | |
CN111187806B (zh) | 一种基于3D DNA纳米网状结构双信号放大技术的microRNA检测方法 | |
Liu et al. | Electrochemical aptasensor using the tripropylamine oxidation to probe intramolecular displacement between target and complementary nucleotide for protein array | |
CN112903786A (zh) | 基于无酶级联循环信号放大的血清中循环miRNA的电化学检测方法 | |
Zhang et al. | A sensitive electrochemical assay for T4 polynucleotide kinase activity based on titanium dioxide nanotubes and a rolling circle amplification strategy | |
CN109136336B (zh) | 一种纸基miRNA电化学传感器的制备方法及应用 | |
Nam et al. | Aptamer-based immunosensor on the ZnO nanorods networks | |
CN114235916B (zh) | 电化学生物传感器及其制备方法与应用 | |
Xu et al. | Electrochemical aptamer sensor for thrombin detection based on au nanoneedle and enzymatic ascorbic acid oxidization | |
Li et al. | Sensitive fluorescent sensor for recognition of HIV-1 dsDNA by using glucose oxidase and triplex DNA | |
Li et al. | DNA tetrahedron and star trigon nanostructures for target recycling detection of nucleic acid | |
CN112342274B (zh) | 一种基于dna纳米机器检测udg的生物传感器 | |
CN111218496B (zh) | 一种基于dna步行者偶联的磁性纳米复合物的制备方法及其产品与应用 | |
CN114252485B (zh) | 用于结核分枝杆菌mpt64检测的电化学适体传感器及其检测方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |