CN114397256B - 一种检测MicroRNA-17的生物传感器 - Google Patents
一种检测MicroRNA-17的生物传感器 Download PDFInfo
- Publication number
- CN114397256B CN114397256B CN202111469825.4A CN202111469825A CN114397256B CN 114397256 B CN114397256 B CN 114397256B CN 202111469825 A CN202111469825 A CN 202111469825A CN 114397256 B CN114397256 B CN 114397256B
- Authority
- CN
- China
- Prior art keywords
- biosensor
- mirna
- crrna
- trigger
- nucleotide sequence
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000003153 chemical reaction reagent Substances 0.000 claims abstract description 11
- HWYHZTIRURJOHG-UHFFFAOYSA-N luminol Chemical compound O=C1NNC(=O)C2=C1C(N)=CC=C2 HWYHZTIRURJOHG-UHFFFAOYSA-N 0.000 claims abstract description 11
- 101150098304 cas13a gene Proteins 0.000 claims abstract description 8
- 239000000523 sample Substances 0.000 claims abstract description 8
- 108010089792 Hemeproteins Proteins 0.000 claims abstract description 3
- 102000008015 Hemeproteins Human genes 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 10
- 150000003278 haem Chemical class 0.000 claims description 7
- 239000002773 nucleotide Substances 0.000 claims description 7
- 125000003729 nucleotide group Chemical group 0.000 claims description 7
- 239000007853 buffer solution Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 108090000623 proteins and genes Proteins 0.000 claims description 4
- 102000004169 proteins and genes Human genes 0.000 claims description 4
- 239000012295 chemical reaction liquid Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 2
- 238000002798 spectrophotometry method Methods 0.000 claims description 2
- 239000012086 standard solution Substances 0.000 claims description 2
- 230000036632 reaction speed Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000011896 sensitive detection Methods 0.000 abstract description 2
- 108091028043 Nucleic acid sequence Proteins 0.000 abstract 1
- 229920002477 rna polymer Polymers 0.000 abstract 1
- 108091079001 CRISPR RNA Proteins 0.000 description 17
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 8
- 108700011259 MicroRNAs Proteins 0.000 description 8
- 230000000295 complement effect Effects 0.000 description 6
- 238000005457 optimization Methods 0.000 description 6
- 108020004414 DNA Proteins 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 108091032973 (ribonucleotides)n+m Proteins 0.000 description 3
- 230000003321 amplification Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 108090000790 Enzymes Proteins 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 2
- 108091081406 G-quadruplex Proteins 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 102000040650 (ribonucleotides)n+m Human genes 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 108091033409 CRISPR Proteins 0.000 description 1
- 238000010354 CRISPR gene editing Methods 0.000 description 1
- 108010040467 CRISPR-Associated Proteins Proteins 0.000 description 1
- 238000000636 Northern blotting Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 210000005006 adaptive immune system Anatomy 0.000 description 1
- 239000000090 biomarker Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010362 genome editing Methods 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 108091008104 nucleic acid aptamers Proteins 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 238000003757 reverse transcription PCR Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
本发明属于传感器技术领域,提供了一种检测微MicroRNA的生物传感器,包括核苷酸序列如SEQ ID NO:1‑6所示的crRNA,发夹探针pre‑trigger、H1、H2、H3、H4和Cas13a蛋白、血红素、鲁米诺试剂、H2O2。该生物传感器实现了目标物的快速,简单,灵敏的检测;制作该生物传感器的工艺成本低,且反应条件温和,反应速度快。
Description
技术领域
本发明属于传感器技术领域,特别涉及一种核酸适配体检测MicroRNA-17的生物传感器。
背景技术
MicroRNA (miRNA)在正常组织、良性肿瘤和恶性肿瘤中表达水平的不同,使其成为肿瘤诊断和预后评估的重要生物标志物,这就凸显了发展高敏感性和特异性miRNA检测的紧迫性和重要性。然而,传统的实验方法如Northern blotting、RT-PCR等因为其复杂的实验过程和较低的灵敏度限制了其应用。
CRISPR-Cas系统(clustered regularly interspaced short palindromicrepeats and crispr associated protein)作为原核生物的适应性免疫系统,已被广泛应用于真核生物的基因编辑。由前体crRNA (pre-crRNA)加工产生的成熟CRISPR RNA(crRNA)对形成活性CRISPR效应复合物至关重要。Cas13a的特别之处在于,Cas13a一旦识别并切割由crRNA序列指定的RNA目标,它就转入了一种酶促“激活”状态,这时它将结合并切割其他的RNA。因cas13a蛋白具有高保真度和独特的靶标激活侧切活性,使该策略具有较高的灵敏度和特异性。
发明内容
为了实现对MicroRNA-17更加灵敏、快速、低成本的检测,本发明提供了一种检测微MicroRNA的生物传感器。
一种检测MicroRNA-17的生物传感器,包括核苷酸序列如SEQ ID NO: 1-6所示的crRNA,发夹探针pre-trigger、H1、H2、H3、H4和Cas13a蛋白、血红素、鲁米诺试剂、H2O2。
优选地,上述传感器中还包括miRNA-17标准溶液。
上述生物传感器可用于制备检测miRNA-17试剂盒。
上述生物传感器或试剂盒在检测miRNA-17中的应用。
具体地,上述应用包括以下步骤:
(1)将发夹探针pre-trigger、H1、H2、H3、H4和缓冲溶液共孵育,在水浴锅中完成退火,获得产物液;
(2)将cas蛋白、crRNA、产物液及待测溶液在缓冲溶液中孵育,获得反应液;
(3)在反应液中依次加入血红素、鲁米诺试剂和H2O2溶液,进行分光光度测定。
优选地,所述Cas13a蛋白与crRNA的摩尔比为2:1。
优选地,步骤(3)中,检测波长为400 nm-600 nm。
本发明的检测原理如下:
本发明的传感器在对miRNA-17(CAAAGUGCUUACAGUGCAGGUAG)进行检测时用到以下序列:
crRNA:GACCACCCCAAAAAUGAAGGGGACUAAAACCUACCUGCACUGUAAGCAC UUUG;
pre-trigger:GGAATGTGTCACATTUUAATGTGTCACATTCC;
H1:AATGTGACACATTTAAGCCACGAGTGTC;
H2:GACACTCGTGGGACAGACGACACACGAG;
H3:CTCGTGTGTCGTCCTATCAGATGCCTACGACAC;
H4:GTGTCGTAGGCATCGGACACTCGTGGCTTAGATGCCT;
其中crRNA和miRNA-17的斜体部分为互补序列,pre-tirgger和H1中单下划线部分为互补序列,H1和H2中斜体部分为互补序列,H2和H3中单下划线部分为互补序列,H3和H4中斜体部分为互补序列,H4和H1中单下划线部位为互补序列;
如图1所示,当目标物存在时,可与crRNA结合,激活Cas13a的反式切割活性,将pre-trigger切断,使发夹pre-trigger之间不稳定,形成两条trigger链。两条trigger链都可以打开H1,H1又继而打开H2,H2打开H3,H3打开H4,触发杂交链反应(HCR反应),而H4又可与H1结合,释放trigger链,使其可以参与下一个循环。H1、H2、H3、H4的末端均为富G序列,通过上述无限次循环实现指数放大,产生大量的G四联体实现信号放大;
随着各发卡探针暴露出G四联体,当加入血红素时,组装成类过氧化物酶,在H2O2存在时,进行氧化还原反应,催化鲁米诺试剂发光,从而通过测量化学发光强度来定量检测目标产物。
本发明具有以下优点:
本发明利用Cas13/crRNA复合体对miRNA-17的特异性识别和反式切割活性,利用trigger引发的杂交链反应实现了对目标物的循环放大;利用发夹末端的富G序列形成G四链体,通过类过氧化物酶催化鲁米诺试剂反应,实现了信号的检测。由于该传感器无酶参与,其检测方法操作简便、检测速度快。该传感器的构建简单,仅需两步,有效避免了多步加入样品可能带来的污染、繁琐的样品前处理过程,具有操作简单、反应速度快等优势;检测原理的主要过程均是在均相中实现的,提高了反应速度,降低了操作的复杂程度,实现了目标物的快速,简单,灵敏的检测;制作该生物传感器的工艺成本低,且反应条件温和,反应速度快。
附图说明
图1为该实验的原理图;
图2为pre-trigger浓度优化检测结果图;
图3为H1浓度优化检测结果图;
图4为反应时间优化检测结果图;
图5为传感器检测miRNA-17的工作曲线。
具体实施方式
下面结合实施例和附图对本发明做进一步说明,但本发明不受下述实施例的限制。
实施例1 pre-trigger浓度优化
(1)在1.5 mL离心管中,加入发夹pre-trigger(终浓度分别为0.4 μM,0.6 μM,0.8μM,1.0 μM,1.2 μM,1.4 μM)、H1(10 µM)、H2(10 µM)、H3(10 µM)、H4(10 µM)各10 µL,加入10 µL10×buffer2.1,震荡混匀后放入95℃水浴锅5 min,然后冷却至室温;
(2)取2 µL cas13a蛋白(100 nM)、2 µL crRNA(50 nM)、1 µL miRNA-17、26.7 µL灭菌水加入上述所得的溶液中,将离心管置于37℃水浴锅中反应75 min;
(3)加入3 µL血红素、3 µL鲁米诺试剂、3.3 µL过氧化氢,荧光仪在420 nm处检测化学发光峰值。化学发光光谱测量范围是400 nm到600 nm,读取荧光信号变化,检测目标物;
结果见图2,从图中可以看出,检测到的化学发光强度峰值随着pre-trigger的浓度增大而增大,当浓度超过1.0 μM后,化学发光强度趋于稳定。所以pre-trigger的最佳浓度为1.0 μM。
实施例2 H1浓度优化
(1)在1.5 mL离心管中,加入发夹pre-trigger(10 µM)、H1(终浓度分别为0.4 μM,0.6 μM,0.8 μM,1.0 μM,1.2 μM,1.4 μM)、H2(10 µM)、H3(10 µM)、H4(10 µM)各10 µL,加入10 µL10×buffer2.1,震荡混匀后放入95℃水浴锅5 min,然后冷却至室温;
(2)取2 µL cas13a蛋白(100 nM)、2 µL crRNA(50 nM)、1 µL miRNA-17、26.7 µL灭菌水加入上述所得的溶液中,将离心管置于37℃水浴锅中反应75 min;
(3)加入3 µL血红素、3 µL鲁米诺试剂、3.3 µL过氧化氢,荧光仪在420 nm处检测化学发光峰值。化学发光光谱测量范围是400 nm到600 nm,读取荧光信号变化,检测目标物;
结果见图3,从图中可以看出,检测到的化学发光强度峰值随着H1的浓度增大而增大,当浓度超过1.0 μM后,化学发光强度趋于稳定。所以H1的最佳浓度为1.0 μM。
实施例3 反应时间优化
(1)在1.5 mL离心管中,加入发夹pre-trigger(10 µM)、H1(10 µM)、H2(10 µM)、H3(10 µM)、H4(10 µM)各10 µL,加入10 µL10×buffer2.1,震荡混匀后放入95℃水浴锅5min,然后冷却至室温;
(2)取2 µL cas13a蛋白(100 nM)、2 µL crRNA(50 nM)、1 µL miRNA-17、26.7 µL灭菌水加入上述所得的溶液中,将离心管置于37℃水浴锅中反应30 min、45 min、60 min、75 min、90 min、105 min、120 min;
(3)加入3 µL血红素、3 µL鲁米诺试剂、3.3 µL过氧化氢,荧光仪在420 nm处检测化学发光峰值。化学发光光谱测量范围是400 nm到600 nm,读取荧光信号变化,检测目标物;
结果见图3,从图中可以看出,检测到的化学发光强度峰值随着时间延长而增大,当时间超过75 min后,化学发光强度趋于稳定。所以最佳反应时间为75 min。
应用例1 生物传感器对miRNA-17的检测
(1)在1.5 mL离心管中,加入发夹pre-trigger(10 µM)、H1(10 µM)、H2(10 µM)、H3(10 µM)、H4(10 µM)各10 µL,加入10 µL10×buffer2.1,震荡混匀后放入95℃水浴锅5min,然后冷却至室温;
(2)取2 µL cas13a蛋白(100 nM)、2 µL crRNA(50 nM)、1 µL miRNA-17(0 nM、5nM、100 nM、200 nM、500 nM、1 µM、2 µM、4 µM)、26.7 µL灭菌水加入上述所得的溶液中,将离心管置于37℃水浴锅中反应75 min;
(3)加入3 µL血红素、3 µL鲁米诺试剂、3.3 µL过氧化氢,荧光仪在420 nm处检测化学发光峰值。化学发光光谱测量范围是400 nm到600 nm,读取荧光信号变化,检测目标物;
结果见图5,从图中可以看出,检测到的荧光信号强度随着miRNA-17的浓度在0.1µM - 4 µM区间内逐渐上升;且miRNA浓度的对数与荧光强度大小呈正比关系,拟合曲线为I=411.05137+433.47807 lgC(nM)(相关系数是0.999,其中C代表了miRNA的浓度),经检测,当浓度低于100nM时,miRNA浓度的对数与荧光大小不再符合拟合曲线规律。因此,可得到该方法检测miRNA的下限为100 nM。
序列表
<110> 济南大学
<120> 一种检测MicroRNA-17的生物传感器
<130> 20211125-2
<160> 6
<170> PatentIn version 3.5
<210> 1
<211> 53
<212> RNA
<213> Artificial Sequence
<220>
<223> crRNA
<400> 1
gaccacccca aaaaugaagg ggacuaaaac cuaccugcac uguaagcacu uug 53
<210> 2
<211> 32
<212> DNA
<213> Artificial Sequence
<220>
<223> pre-trigger
<400> 2
ggaatgtgtc acattuuaat gtgtcacatt cc 32
<210> 3
<211> 28
<212> DNA
<213> Artificial Sequence
<220>
<223> H1
<400> 3
aatgtgacac atttaagcca cgagtgtc 28
<210> 4
<211> 28
<212> DNA
<213> Artificial Sequence
<220>
<223> H2
<400> 4
gacactcgtg ggacagacga cacacgag 28
<210> 5
<211> 33
<212> DNA
<213> Artificial Sequence
<220>
<223> H3
<400> 5
ctcgtgtgtc gtcctatcag atgcctacga cac 33
<210> 6
<211> 37
<212> DNA
<213> Artificial Sequence
<220>
<223> H4
<400> 6
gtgtcgtagg catcggacac tcgtggctta gatgcct 37
Claims (8)
1.一种检测MicroRNA-17的生物传感器,其特征在于,包括crRNA、发夹探针pre-trigger、H1、H2、H3、H4、Cas13a蛋白、血红素、鲁米诺试剂和H2O2;
所述crRNA的核苷酸序列为:
GACCACCCCAAAAAUGAAGGGGACUAAAACCUACCUGCACUGUAAGCACUUUG;
所述pre-trigger的核苷酸序列为:
GGAATGTGTCACATTUUAATGTGTCACATTCC;
所述H1的核苷酸序列为:
AATGTGACACATTTAAGCCACGAGTGTC ;
所述H2的核苷酸序列为:
GACACTCGTGGG ACAGACGACACACGAG;
所述H3的核苷酸序列为:
CTCGTGTGTCGTCCTATCAGATGCCTACGACAC ;
所述H4的核苷酸序列为:
GTGTCGTAGGCATC GGACACTCGTGGCTTAGATGCCT。
2.根据权利要求1所述的生物传感器,其特征在于,还包括miRNA-17标准溶液。
3.一种包含权利要求1-2任一所述生物传感器的检测miRNA-17的试剂盒。
4.一种如权利要求1-2任一所述生物传感器在非诊断目的的检测miRNA-17中的应用。
5.一种如权利要求3所述的试剂盒在非诊断目的的检测miRNA-17中的应用。
6.根据权利要求4或5所述的应用,其特征在于,包括以下步骤:
(1)将发夹探针pre-trigger、H1、H2、H3、H4和缓冲溶液共孵育,在水浴锅中完成退火,获得产物液;
(2)将Cas13a蛋白、crRNA、产物液及待测溶液在缓冲溶液中孵育,获得反应液;
(3)在反应液中依次加入血红素、鲁米诺试剂和H2O2溶液,进行分光光度测定。
7.根据权利要求6所述的应用,其特征在于,所述Cas13a蛋白与crRNA的摩尔比为2:1。
8.根据权利要求7所述的应用,其特征在于,步骤(3)中,检测波长为400 nm-600 nm。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111469825.4A CN114397256B (zh) | 2021-12-03 | 2021-12-03 | 一种检测MicroRNA-17的生物传感器 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111469825.4A CN114397256B (zh) | 2021-12-03 | 2021-12-03 | 一种检测MicroRNA-17的生物传感器 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN114397256A CN114397256A (zh) | 2022-04-26 |
CN114397256B true CN114397256B (zh) | 2024-05-14 |
Family
ID=81225199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111469825.4A Active CN114397256B (zh) | 2021-12-03 | 2021-12-03 | 一种检测MicroRNA-17的生物传感器 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN114397256B (zh) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110452810A (zh) * | 2019-08-15 | 2019-11-15 | 济南大学 | 一种检测MicroRNA的生物传感器及其制备方法和应用 |
CN110982878A (zh) * | 2019-11-29 | 2020-04-10 | 华南师范大学 | CRISPR/Cas13a结合电化学发光系统检测microRNA的方法与应用 |
CN112345751A (zh) * | 2020-11-06 | 2021-02-09 | 济南大学 | 一种检测赭曲霉毒素a的比色生物传感器 |
CN113512578A (zh) * | 2021-06-25 | 2021-10-19 | 三峡大学 | 基于恒温无酶多级扩增的miRNA化学发光检测试剂盒 |
-
2021
- 2021-12-03 CN CN202111469825.4A patent/CN114397256B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110452810A (zh) * | 2019-08-15 | 2019-11-15 | 济南大学 | 一种检测MicroRNA的生物传感器及其制备方法和应用 |
CN110982878A (zh) * | 2019-11-29 | 2020-04-10 | 华南师范大学 | CRISPR/Cas13a结合电化学发光系统检测microRNA的方法与应用 |
CN112345751A (zh) * | 2020-11-06 | 2021-02-09 | 济南大学 | 一种检测赭曲霉毒素a的比色生物传感器 |
CN113512578A (zh) * | 2021-06-25 | 2021-10-19 | 三峡大学 | 基于恒温无酶多级扩增的miRNA化学发光检测试剂盒 |
Non-Patent Citations (1)
Title |
---|
DNA Domino-Based Nanoscale Logic Circuit: A Versatile Strategy for Ultrasensitive Multiplexed Analysis of Nucleic Acids;Hadi Ravan et al.;Anal. Chem.;第89卷;第6021-6028页 * |
Also Published As
Publication number | Publication date |
---|---|
CN114397256A (zh) | 2022-04-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Jou et al. | Diagnosing the miR-141 prostate cancer biomarker using nucleic acid-functionalized CdSe/ZnS QDs and telomerase | |
Jiang et al. | G-quadruplex fluorescent probe-mediated real-time rolling circle amplification strategy for highly sensitive microRNA detection | |
Wu et al. | Label-free and enzyme-free colorimetric detection of microRNA by catalyzed hairpin assembly coupled with hybridization chain reaction | |
CN109913546B (zh) | 一种检测miRNA的荧光生物探针及检测方法和用途 | |
Wang et al. | Target-assisted FRET signal amplification for ultrasensitive detection of microRNA | |
CN112574998B (zh) | 检测黄曲霉毒素b1的探针组、试剂盒及其应用 | |
Pu et al. | One-step enzyme-free detection of the miRNA let-7a via twin-stage signal amplification | |
TWI626246B (zh) | 多核苷酸探針、使用該探針偵測目標核酸之方法及包含該探針之套組 | |
Deng et al. | An ultrasensitive homogeneous chemiluminescent assay for microRNAs | |
CN113512578B (zh) | 基于恒温无酶多级扩增的miRNA化学发光检测试剂盒 | |
CN114540503B (zh) | 基于链置换和酶辅助循环信号放大的肿瘤抑制因子Let-7a检测试剂盒及其使用方法 | |
Chen et al. | Intracellular self-enhanced rolling circle amplification to image specific miRNAs within tumor cells | |
CN112795626A (zh) | 一种同时检测两种循环miRNA的可视化检测方法及检测探针 | |
Feng et al. | Label-free optical bifunctional oligonucleotide probe for homogeneous amplification detection of disease markers | |
Wu et al. | G-triplex based molecular beacon with duplex-specific nuclease amplification for the specific detection of microRNA | |
WO2022204427A1 (en) | Crispr-mediated cleavage of oligonucleotide-detectable marker conjugates for detection of target analytes | |
CN108642164B (zh) | miRNA捕获探针、分离扩增一体化的检测方法及检测试剂盒 | |
Shuofeng et al. | Sensitive detection of microRNA based on high-fidelity CRISPR/Cas13a trans cleavage activity coupled with template-free DNA extension-induced strongly emitting copper nanoparticles | |
Zhou et al. | Bacterial DNA analysis based on target aided self-assembly cycle amplification coupled with DNA-AgNCs/three-way DNA junction | |
Nie et al. | Enzyme-assisted amplification of target cycle triggers the unlocking of locked hairpin probes for let-7a detection | |
CN114397256B (zh) | 一种检测MicroRNA-17的生物传感器 | |
CN106884047B (zh) | 基于核酸适配体检测miRNA-155的方法 | |
CN108823281A (zh) | 一种基于核酸适配体的循环聚合免标记荧光检测pd-1的方法 | |
CN113804898A (zh) | 同时检测皮质醇、血清睾酮、肌酸激酶同工酶的荧光传感方法和试剂盒 | |
CN117646069A (zh) | 一种基于滚环扩增和CRISPR/Cas12a检测miRNA-141的检测试剂盒 |
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 |