CN112986552B - 一种检测黄曲霉毒素b1的生物芯片及其制备方法 - Google Patents
一种检测黄曲霉毒素b1的生物芯片及其制备方法 Download PDFInfo
- Publication number
- CN112986552B CN112986552B CN202110519689.9A CN202110519689A CN112986552B CN 112986552 B CN112986552 B CN 112986552B CN 202110519689 A CN202110519689 A CN 202110519689A CN 112986552 B CN112986552 B CN 112986552B
- Authority
- CN
- China
- Prior art keywords
- aflatoxin
- biochip
- pyrrole
- aminopropyltriethoxysilane
- chip
- 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
- 238000000018 DNA microarray Methods 0.000 title claims abstract description 44
- 239000002115 aflatoxin B1 Substances 0.000 title claims abstract description 33
- OQIQSTLJSLGHID-WNWIJWBNSA-N aflatoxin B1 Chemical compound C=1([C@@H]2C=CO[C@@H]2OC=1C=C(C1=2)OC)C=2OC(=O)C2=C1CCC2=O OQIQSTLJSLGHID-WNWIJWBNSA-N 0.000 title claims abstract description 33
- 229930020125 aflatoxin-B1 Natural products 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000000523 sample Substances 0.000 claims abstract description 33
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229930195730 Aflatoxin Natural products 0.000 claims abstract description 20
- XWIYFDMXXLINPU-UHFFFAOYSA-N Aflatoxin G Chemical compound O=C1OCCC2=C1C(=O)OC1=C2C(OC)=CC2=C1C1C=COC1O2 XWIYFDMXXLINPU-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000005409 aflatoxin Substances 0.000 claims abstract description 20
- 108091023037 Aptamer Proteins 0.000 claims abstract description 17
- 125000003172 aldehyde group Chemical group 0.000 claims abstract description 12
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 239000002052 molecular layer Substances 0.000 claims abstract description 8
- 239000000243 solution Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000001994 activation Methods 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000000678 plasma activation Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 24
- 230000035945 sensitivity Effects 0.000 abstract description 13
- 239000011159 matrix material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 23
- 238000006243 chemical reaction Methods 0.000 description 6
- 101100434480 Arabidopsis thaliana AFB2 gene Proteins 0.000 description 4
- WWSYXEZEXMQWHT-WNWIJWBNSA-N aflatoxin B2 Chemical compound C=1([C@@H]2CCO[C@@H]2OC=1C=C(C1=2)OC)C=2OC(=O)C2=C1CCC2=O WWSYXEZEXMQWHT-WNWIJWBNSA-N 0.000 description 4
- 102100034212 AFG1-like ATPase Human genes 0.000 description 3
- 101000780581 Homo sapiens AFG1-like ATPase Proteins 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- LINOMUASTDIRTM-QGRHZQQGSA-N deoxynivalenol Chemical compound C([C@@]12[C@@]3(C[C@@H](O)[C@H]1O[C@@H]1C=C(C([C@@H](O)[C@@]13CO)=O)C)C)O2 LINOMUASTDIRTM-QGRHZQQGSA-N 0.000 description 3
- 229930002954 deoxynivalenol Natural products 0.000 description 3
- 238000011534 incubation Methods 0.000 description 3
- RWQKHEORZBHNRI-BMIGLBTASA-N ochratoxin A Chemical compound C([C@H](NC(=O)C1=CC(Cl)=C2C[C@H](OC(=O)C2=C1O)C)C(O)=O)C1=CC=CC=C1 RWQKHEORZBHNRI-BMIGLBTASA-N 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- MBMQEIFVQACCCH-UHFFFAOYSA-N trans-Zearalenon Natural products O=C1OC(C)CCCC(=O)CCCC=CC2=CC(O)=CC(O)=C21 MBMQEIFVQACCCH-UHFFFAOYSA-N 0.000 description 3
- LINOMUASTDIRTM-UHFFFAOYSA-N vomitoxin hydrate Natural products OCC12C(O)C(=O)C(C)=CC1OC1C(O)CC2(C)C11CO1 LINOMUASTDIRTM-UHFFFAOYSA-N 0.000 description 3
- MBMQEIFVQACCCH-QBODLPLBSA-N zearalenone Chemical compound O=C1O[C@@H](C)CCCC(=O)CCC\C=C\C2=CC(O)=CC(O)=C21 MBMQEIFVQACCCH-QBODLPLBSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VYLQGYLYRQKMFU-UHFFFAOYSA-N Ochratoxin A Natural products CC1Cc2c(Cl)cc(CNC(Cc3ccccc3)C(=O)O)cc2C(=O)O1 VYLQGYLYRQKMFU-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 125000002485 formyl group Chemical group [H]C(*)=O 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- DAEYIVCTQUFNTM-UHFFFAOYSA-N ochratoxin B Natural products OC1=C2C(=O)OC(C)CC2=CC=C1C(=O)NC(C(O)=O)CC1=CC=CC=C1 DAEYIVCTQUFNTM-UHFFFAOYSA-N 0.000 description 2
- 239000008363 phosphate buffer Substances 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- 230000005653 Brownian motion process Effects 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- 101000928239 Homo sapiens Afamin Proteins 0.000 description 1
- 108091005461 Nucleic proteins Proteins 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- MJBWDEQAUQTVKK-IAGOWNOFSA-N aflatoxin M1 Chemical compound C=1([C@]2(O)C=CO[C@@H]2OC=1C=C(C1=2)OC)C=2OC(=O)C2=C1CCC2=O MJBWDEQAUQTVKK-IAGOWNOFSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000427 antigen Substances 0.000 description 1
- 108091007433 antigens Proteins 0.000 description 1
- 102000036639 antigens Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012742 biochemical analysis Methods 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001900 immune effect Effects 0.000 description 1
- 230000036046 immunoreaction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 108700012359 toxins Proteins 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M1/00—Apparatus for enzymology or microbiology
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54306—Solid-phase reaction mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Biotechnology (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Urology & Nephrology (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- Medicinal Chemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Cell Biology (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- General Engineering & Computer Science (AREA)
- Genetics & Genomics (AREA)
- Sustainable Development (AREA)
- Dispersion Chemistry (AREA)
- Clinical Laboratory Science (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
本发明公开了一种检测黄曲霉毒素B1的生物芯片及其制备方法,涉及生物芯片技术领域。本发明所述检测黄曲霉毒素B1的生物芯片包含基体芯片、3‑氨丙基三乙氧基硅烷与吡咯的复合膜层和探针分子层,所述探针分子层包含醛基修饰的适配体和黄曲霉毒素抗体中的至少一种;所述3‑氨丙基三乙氧基硅烷和吡咯的复合膜层中3‑氨丙基三乙氧基硅烷和吡咯的质量比为1:2~5。本发明所述生物芯片对黄曲霉毒素B1的检测灵敏度较高。
Description
技术领域
本发明涉及生物芯片技术领域,尤其涉及一种检测黄曲霉毒素B1的生物芯片及其制备方法。
背景技术
随着生命科学的发展,生物芯片应运而生,生物芯片是通过微缩技术,根据分子间特异性地相互作用的原理,将分析过程集成于硅芯片或玻璃芯片表面的微型生物化学分析系统,以实现对细胞、蛋白质、基因及其他生物成分的准确、快速、大信息量的检测。
传统的生物芯片检测方法是芯片上的探针分子(核酸、蛋白质等生物分子)与待测生物分子通过扩散或布朗运动结合来进行检测,检测时间长。目前研究发现,通过使用电极片作为芯片,基于电学检测方法进行检测可以大幅提高检测效率,但该技术的难点在于,生物分子难以在电极片表面附着,制备工艺对电极片的性能也具有较大影响,尤其对于小分子待测物,芯片的表面状态对其检测精度影响巨大。
发明内容
本发明的目的在于克服上述现有技术的不足之处而提供一种检测黄曲霉毒素B1(AFB1)的生物芯片及其制备方法,所述生物芯片对于黄曲霉毒素B1的检测具有较高的灵敏度。
为实现上述目的,本发明所采取的技术方案为:一种检测黄曲霉毒素B1的生物芯片,所述生物芯片包含基体芯片、3-氨丙基三乙氧基硅烷(APTES)与吡咯的复合膜层和探针分子层,所述探针分子层包含醛基修饰的适配体和黄曲霉毒素抗体中的至少一种;所述APTES和吡咯的复合膜层中APTES和吡咯的质量比为1:2~5。
适配体与黄曲霉毒素抗体均能与黄曲霉毒素B1结合,为了便于进行电学检测,需要将上述两种探针分子包被在电极片芯片外,但直接包被探针分子容易脱落,为了增强探针分子与电极片芯片的结合强度,提高检测灵敏度,本发明在芯片与探针分子间制备了一层APTES与吡咯的复合膜层。通过对ATPES与吡咯的配比进行选择,使得制备的膜层可与芯片及探针分子形成良好的连接。
优选地,所述APTES和吡咯的复合膜层中APTES和吡咯的质量比为1:4。当两者以上述比例复配后制备的生物芯片灵敏度最高。
优选地,所述探针分子层为醛基修饰的适配体和黄曲霉毒素抗体的复配物,所述复配物中,醛基修饰的适配体和黄曲霉毒素抗体的体积比为1:0.5~3。
醛基修饰的适配体可以与上述APTES和吡咯的复合膜层稳定结合,本领域公知,黄曲霉毒素抗体与黄曲霉毒素B1具有良好的结合性,当将两者以上述配比复配后可保证芯片具有稳固的结构,同时在不降低测量灵敏度的情况下,还能节省成本,具有较高的经济效益。
优选地,所述探针分子层中,醛基修饰的适配体和黄曲霉毒素抗体的体积比为1:1~3。当两者的比例在所述范围内时,可保证生物芯片对黄曲霉毒素B1兼具良好的检测灵敏度和特异性。
同时,本发明还公开了一种上述检测黄曲霉毒素B1的生物芯片的制备方法,包括如下步骤:
(1)分别以有机溶剂、水冲洗基体芯片,然后以空气对基体芯片进行等离子清洗,清洗条件为:10~100W,5~20min;
(2)以空气对基体芯片进行等离子活化,活化条件为:10~30W,15~30min;
(3)以3-氨丙基三乙氧基硅烷和吡咯混合液为原料,以等离子涂覆法制备膜层,涂覆条件为:10~50W,20~30min;
(4)在涂覆有膜层的芯片表面滴加探针分子溶液,于30~40℃下孵育1~3h,得到所述生物芯片。
采用上述等离子方法制备生物芯片可极大地提高生物芯片的制备效率,并且无需使用其他添加剂,对环境无污染,对资源无浪费。
优选地,所述步骤(3)中,涂覆条件为:20~30W,25min。若涂覆功率过低、时间过短,膜层厚度较薄,探针分子无法良好地固定在芯片上,生物芯片表面探针密度太低,对于小分子的黄曲霉毒素B1来说无法进行精准地检测;若功率过高、时间过长,膜层太厚,一是容易导致膜层与芯片的结合不牢固,另一方面,芯片对黄曲霉毒素B1的检测灵敏度会降低。
优选地,所述步骤(4)中,探针分子溶液的滴加量为0.5~0.6μg/cm2。将醛基修饰的适配体和黄曲霉毒素抗体按比例混合即为探针分子溶液。探针分子与黄曲霉毒素B1直接结合,当其含量过少时,对黄曲霉毒素B1的检测效率会降低,当其含量过高时,与膜层的结合强度会降低。
相比于现有技术,本发明的有益效果为:本发明提供了一种新的检测黄曲霉毒素B1的生物芯片,通过对生物芯片各层结构的原料进行选择,使得制备出的生物芯片具有稳定的结构,对黄曲霉毒素B1具有较高的灵敏度。同时本发明还提供了一种制备所述生物芯片的方法,所述方法工艺简单,并且成本较低。
具体实施方式
为更好地说明本发明的目的、技术方案和优点,下面将结合具体实施例对本发明作进一步说明。
以下实施例和对比例所用的芯片选用中国专利CN104965081B、专利名称为“基于移动设备的抗体抗原检测方法”中的反应单元,反应单元包括一个顶部开口的反应腔,反应腔底部设置有一块检测板,检测板上铺设有至少一对电极片,电极片的接线端穿过并固定在反应腔和盒体上。铺设有电极片的检测板的结构可以参见发明人在先发表论文(Development of an AC electrokinetics-based immunoassay system for on-siteserodiagnosis of infectious diseases,Xiaozhu Liu,Sensors and Actuators A,171(2011) 406–413,Fig. 3.(b))。反应腔和检测板为硅制材料(Si),电极片均为金属材质(Al)。
APTES和吡咯来自Sigma,醛基修饰的适配体(该适配体序列为:5'-GTT GGG CACGTG TTG TCT CTC TGT GTC TCG TGC CCT TCG CTA GGC CCA CA-CHO-3')来自西南大学食品科学学院,黄曲霉毒素抗体(抗AFB1单克隆抗体(6mg/mL))来自北京沫之东生物技术有限公司,黄曲霉毒素标准品(AFB1、AFB2、AFG1、AFM1)、赭曲霉毒素 A(OTA)、玉米赤霉烯酮(ZEN)、脱氧雪腐镰刀菌烯醇(DON)来自新加坡Pribolab公司。
实施例1~3和对比例1~2均为检测黄曲霉毒素B1的生物芯片,其复合膜层中APTES和吡咯的配比见表1,具体制备方法如下:
(1)对芯片进行镜检,利用金相显微镜在10倍目镜下观察芯片表面,取无断条、无连条、无粘附杂质的芯片,剔除不合格芯片。过程中,判断芯片表面无粘附杂质的依据为:在电极片叉指部位(即电极片之间的间隙)没有大于0.5μm的斑点、颗粒、赃物和尘埃粒子,如有就判定为不合格。分别以甲苯、丙酮、乙醇、水冲洗基体芯片,在每种试剂中泡5min,冲10s,氮气吹干后以空气对基体芯片进行等离子清洗,真空度为0.5mbar,清洗条件为:50W,10min;
(2)以空气对基体芯片进行等离子活化,真空度为0.5mbar,活化条件为:20W,20min;
(3)以APTES和吡咯混合液为原料,以等离子涂覆法制备膜层,涂覆条件为:30W,25min;
(4)在涂覆有膜层的芯片表面滴加探针分子溶液,滴加量为0.6μg/cm2,探针分子溶液中醛基修饰的适配体和黄曲霉毒素抗体的体积比为1:2.5,将滴加了探针分子溶液的芯片放置于37℃下孵育2h,得到所述生物芯片。
表1
项目 | 实施例1 | 实施例2 | 实施例3 | 对比例1 | 对比例2 |
APTES:吡咯(质量比) | 1:2 | 1:4 | 1:5 | 1:1 | 1:6 |
实施例4~7和对比例3~4均为检测黄曲霉毒素B1的生物芯片,其制备方法与实施例2的区别仅在于,探针分子溶液中醛基修饰的适配体和黄曲霉毒素抗体的体积比不同,两者的配比如表2所示。
表2
项目 | 实施例4 | 实施例5 | 实施例6 | 实施例7 | 对比例3 | 对比例4 |
醛基修饰的适配体:黄曲霉毒素抗体(体积比) | 1:2 | 1:3 | 1:0.5 | 1:1 | 1:4 | 1:0.2 |
实施例8~9和对比例5~7均为检测黄曲霉毒素B1的生物芯片,其制备方法与实施例2的区别在于清洗、活化、涂覆或孵育条件,具体制备条件如表3所示。
表3
项目 | 实施例8 | 实施例9 | 对比例5 | 对比例6 | 对比例7 |
清洗条件 | 10W,20min | 100W,5min | 50W,10min | 50W,10min | 50W,10min |
活化条件 | 30W,15min | 10W,30min | 40W,10min | 20W,20min | 20W,20min |
涂覆条件 | 10W,30min | 50W,20min | 30W,25min | 60W,20min | 30W,25min |
孵育条件 | 40℃,1h | 30℃,3h | 37℃,2h | 37℃,2h | 25℃,5h |
对实施例1~9和对比例1~7制备出的生物芯片的灵敏度和特异性进行测试,通过检出限来评估灵敏度的高低,通过生物芯片对3ng/mL的AFB2、AFM1、AFG1、OTA、DON、ZEN六种共存干扰毒素的响应性进行特异性评估。
检出限的测试方法:配制不同浓度的黄曲霉毒素B1磷酸缓冲盐溶液,在3kHz的交流频率和50mV的电压下用阻抗分析仪检测免疫反应前后生物芯片表面的双电层电容,计算归一化后电容的变化率,绘制归一化电容变化率与黄曲霉毒素B1磷酸缓冲盐溶液中黄曲霉毒素浓度的对数值之间的关系图,每一个浓度水平做三次平行样,取平均值;得出实施例1~9和对比例1~7的最低检出限,具体结果见表4。
表4
项目 | 最低检出限(pg/mL) | 特异性 |
实施例1 | 0.031 | 均未检出 |
实施例2 | 0.016 | 均未检出 |
实施例3 | 0.022 | 均未检出 |
实施例4 | 0.018 | 均未检出 |
实施例5 | 0.020 | 均未检出 |
实施例6 | 0.026 | AFB2有响应 |
实施例7 | 0.023 | 均未检出 |
实施例8 | 0.032 | 均未检出 |
实施例9 | 0.031 | 均未检出 |
对比例1 | 0.051 | 均未检出 |
对比例2 | 0.035 | 均未检出 |
对比例3 | 0.23 | 均未检出 |
对比例4 | 0.27 | AFB2,AFG1,OTA有响应 |
对比例5 | 0.31 | 均未检出 |
对比例6 | 0.43 | 均未检出 |
对比例7 | 0.36 | 均未检出 |
从表4中可知,实施例2具有最小的最低检出限,表明实施例2所述生物芯片对黄曲霉毒素B1具有最高的检测精度和灵敏度。此外,从实施例1~3和对比例1~2的结果中可知,膜层中APTES和吡咯的质量比对生物芯片的性能具有较大影响,只有当两者的质量比为1:2~5时,制备出的生物芯片才能对黄曲霉毒素B1进行更精准的检测。另外,从实施例4~7和对比例3~4的对比中可知,探针分子的成分同样对生物芯片的灵敏度具有一定影响,当醛基修饰的适配体的含量太高时,黄曲霉毒素抗体的比例降低,对黄曲霉毒素B1的特异性降低,当黄曲霉毒素抗体的含量太高时,探针分子与膜层的结合性变差,会降低灵敏度。除此之外,从实施例8~9和对比例5~7的对比中可知,生物芯片的制备条件对生物芯片的性能也具有较大影响,对于不同的膜层材料、不同的探针分子,其制备条件也需针对性地进行选择。
最后所应当说明的是,以上实施例仅用以说明本发明的技术方案而非对本发明保护范围的限制,尽管参照较佳实施例对本发明作了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,但并不脱离本发明技术方案的实质和范围。
Claims (4)
1.一种检测黄曲霉毒素B1的生物芯片,其特征在于,所述生物芯片包含基体芯片、3-氨丙基三乙氧基硅烷与吡咯的复合膜层和探针分子层;所述3-氨丙基三乙氧基硅烷和吡咯的复合膜层中3-氨丙基三乙氧基硅烷和吡咯的质量比为1:4~5;所述探针分子层为醛基修饰的适配体和黄曲霉毒素抗体的复配物,所述复配物中,醛基修饰的适配体和黄曲霉毒素抗体的体积比为1:1~3;
所述的检测黄曲霉毒素B1的生物芯片的制备方法包括如下步骤:
(1)分别以有机溶剂、水冲洗基体芯片,然后以空气对基体芯片进行等离子清洗,清洗条件为:50W,10min;
(2)以空气对基体芯片进行等离子活化,活化条件为:20W,20min;
(3)以3-氨丙基三乙氧基硅烷和吡咯混合液为原料,以等离子涂覆法制备膜层,涂覆条件为:30W,25min;
(4)在涂覆有膜层的芯片表面滴加探针分子溶液,于30~40℃下孵育1~3h,得到所述生物芯片。
2.如权利要求1所述的检测黄曲霉毒素B1的生物芯片,其特征在于,所述3-氨丙基三乙氧基硅烷和吡咯的复合膜层中3-氨丙基三乙氧基硅烷和吡咯的质量比为1:4。
3.如权利要求1所述的检测黄曲霉毒素B1的生物芯片,其特征在于,所述步骤(4)中,探针分子溶液的滴加量为0.5~0.6μg/cm2。
4.如权利要求3所述的检测黄曲霉毒素B1的生物芯片,其特征在于,所述探针分子溶液的制备方法为:按比例将醛基修饰的适配体和黄曲霉毒素抗体混合。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110519689.9A CN112986552B (zh) | 2021-05-13 | 2021-05-13 | 一种检测黄曲霉毒素b1的生物芯片及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110519689.9A CN112986552B (zh) | 2021-05-13 | 2021-05-13 | 一种检测黄曲霉毒素b1的生物芯片及其制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN112986552A CN112986552A (zh) | 2021-06-18 |
CN112986552B true CN112986552B (zh) | 2021-07-30 |
Family
ID=76337620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110519689.9A Active CN112986552B (zh) | 2021-05-13 | 2021-05-13 | 一种检测黄曲霉毒素b1的生物芯片及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112986552B (zh) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1364819A (zh) * | 2002-02-07 | 2002-08-21 | 武汉大学 | N-取代吡咯共聚物及其制备方法和用途 |
CN108254552A (zh) * | 2016-12-28 | 2018-07-06 | 田纳西大学研究基金会 | 通过交流动电学检测生物标志物的方法 |
-
2021
- 2021-05-13 CN CN202110519689.9A patent/CN112986552B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1364819A (zh) * | 2002-02-07 | 2002-08-21 | 武汉大学 | N-取代吡咯共聚物及其制备方法和用途 |
CN108254552A (zh) * | 2016-12-28 | 2018-07-06 | 田纳西大学研究基金会 | 通过交流动电学检测生物标志物的方法 |
Non-Patent Citations (3)
Title |
---|
Nanostructured surfaces for enhanced protein detection toward clinical diagnostics;Vindhya Kunduru 等;《Nanomedicine: Nanotechnology, Biology, and Medicine》;20101231;第6卷;642–650 * |
硅烷偶联剂改性PPy/SiO2纳米导电复合材料的研究;任丽 等;《河北工业大学学报》;20001231;第29卷(第6期);第101-104页 * |
硅烷自组装膜对制备于多孔性基底上导电聚吡咯薄膜性能的影响;沈腊珍 等;《材料工程》;20061231(第8期);第45-48页 * |
Also Published As
Publication number | Publication date |
---|---|
CN112986552A (zh) | 2021-06-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102262115B (zh) | 测定三聚氰胺含量的电化学免疫传感器及制备方法和应用 | |
CN112986205B (zh) | 一种基于电学加速的荧光和化学发光检测方法 | |
CN102262125A (zh) | 检测己烯雌酚的电化学免疫传感器及其制备方法和应用 | |
CN112595765B (zh) | 一种基于温敏型蛋白质印迹凝胶的抗污染电化学生物传感器的制备方法 | |
CN101498719B (zh) | 酶功能化纳米免疫标记物的制备方法及其应用 | |
CN111505077A (zh) | 一种基于RGO-Hemin/Au NPs纳米复合材料检测GPC3的方法 | |
CN109613244B (zh) | 一种Ag@Pt-CuS标记的免疫传感器的制备方法及应用 | |
CN105891483A (zh) | 一种基于石墨烯包裹聚苯乙烯复合纳米球的无标记电化学免疫传感器的制备方法 | |
CN112986552B (zh) | 一种检测黄曲霉毒素b1的生物芯片及其制备方法 | |
Liang et al. | A label-free immunosensor based on PHEMA/graphene oxide nanocomposite for simultaneous electrochemical determination of alpha fetoprotein | |
CN109991298B (zh) | 一种Pt@MOF-GO标记的电化学传感器的制备方法及应用 | |
CN105823886B (zh) | 一种1,1’—二茂铁二甲酸/铂纳米颗粒/dna酶复合物的制备方法及检测甲胎蛋白的方法 | |
CN110261605B (zh) | 一种壳聚糖改性增强试纸检测灵敏度的方法 | |
CN114720515B (zh) | 一种线性范围可调、聚多巴胺介导的免修饰便携式电导率免疫传感器的构建方法及应用 | |
Xu et al. | Multiplex biomarker analysis biosensor for detection of hepatitis B virus | |
CN110988325A (zh) | 封闭剂及包含该封闭剂的试剂盒 | |
Lu et al. | A novel electrochemical immunosensor based on Au nanoparticles and horseradish peroxidase signal amplification for ultrasensitive detection of α-fetoprotein | |
CN114460291A (zh) | 一种基于空心聚合物套管结合Zr-MOF的不同信号放大能力的移液器免疫传感平台 | |
CN112505319A (zh) | 一种待检标志物免疫定量检测装置、检测方法及用途 | |
CN113295869B (zh) | 一种基于超灵敏磁弛豫时间传感器的免疫分析方法 | |
CN114441615B (zh) | 一种检测新冠病毒的电阻抗生物传感器电极的修饰方法 | |
CN112946265B (zh) | 一种基于抗原-抗体结合的单体修饰芯片的工艺 | |
CN113311152B (zh) | 一种三重信号放大磁弛豫传感免疫分析方法 | |
CN113933364B (zh) | 一种基于硅纳米线场效应生化传感器的靶标物浓度检测方法 | |
NL2026488B1 (en) | Method for preparing a protein chip plate |
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 |