WO2015143830A1 - 一种稀土纳米材料溶解增强时间分辨荧光免疫分析方法 - Google Patents
一种稀土纳米材料溶解增强时间分辨荧光免疫分析方法 Download PDFInfo
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- WO2015143830A1 WO2015143830A1 PCT/CN2014/085075 CN2014085075W WO2015143830A1 WO 2015143830 A1 WO2015143830 A1 WO 2015143830A1 CN 2014085075 W CN2014085075 W CN 2014085075W WO 2015143830 A1 WO2015143830 A1 WO 2015143830A1
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- rare earth
- nano material
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- antibody
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- 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
- G01N33/536—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase
- G01N33/542—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase with steric inhibition or signal modification, e.g. fluorescent quenching
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- 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
- G01N33/531—Production of immunochemical test materials
- G01N33/532—Production of labelled immunochemicals
- G01N33/533—Production of labelled immunochemicals with fluorescent label
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- 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
- G01N33/58—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
- G01N33/585—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances with a particulate label, e.g. coloured latex
- G01N33/587—Nanoparticles
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- 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
- G01N33/58—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
- G01N33/588—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances with semiconductor nanocrystal label, e.g. quantum dots
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2458/00—Labels used in chemical analysis of biological material
- G01N2458/40—Rare earth chelates
Definitions
- the present invention relates to a rare earth nano material which can be used for labeling biomolecules, a labeling method thereof and a method for modulating the same, and, in particular, a rare earth nano material which can be used for labeling biomolecules, a labeling method thereof and A method for the dissolution enhancement of rare earth nanomaterials to achieve time-resolved fluorescence immunoassay. Background technique
- Radioimmunoassay an analytical technique
- RIA Radioimmunoassay
- Enzyme-linked immunosorbent assay ELISA
- ELISA Enzyme-linked immunosorbent assay
- CLIA Chemiluminescence immunoassay
- Time-Resolved Immunoassay has high sensitivity, low background, good stability, and wide linear range. It is currently recognized as the most promising non-radioactive immunolabeling technology.
- the analysis system developed in recent years is as follows :
- DELFIA Dissociation-enhanced lanthanide time-resolved immunoassay
- the most widely used consists of a tracer, a bifunctional chelating agent, and an enhancer. Fluorescence enhancement is extremely sensitive One of the important factors. The lanthanide ion forms a micro enthalpy with the reinforcing liquid, which can effectively prevent the quenching of water molecules, thereby greatly enhancing the fluorescence of the system.
- bifunctional chelating agents are also one of the key factors, and the ratio of cesium ions as a preferred marker to protein is between 10 and 20.
- the bifunctional chelating agent is susceptible to foreign substances such as exogenous rare earth ions, and anticoagulants such as ethylenediaminetetraacetic acid and heparin.
- the specimens to be tested must be serum, the operation requirements are very strict, and the price is not Philippines.
- Solid Phase Time-Resolved Immunoassay (FIAgen)—Time-resolved immunoassay using bifunctional rare earth chelates as markers.
- FIAgen Solid Phase Time-Resolved Immunoassay
- fluorescent nanoparticles coated with rare earth chelates are also used in time-resolved immunoassays.
- Each nanoparticle contains thousands of rare earth chelates, which greatly improves the detection sensitivity, but the presence of rare earth chelates. It is easy to leak and susceptible to unstable factors such as photobleaching.
- the rare earth nano material has the advantages of stable properties, large specific surface area, strong modification, and low synthesis cost, and is a new generation of fluorescent biomarker materials which are generally optimistic.
- the luminescence of rare earth nanomaterials is absorbed by sensitized luminescence through the inter-electron transition of rare earth ions 4f.
- the molar extinction coefficient is small and the luminescence is weak.
- Direct detection of rare earth nanomaterials as markers has a lower sensitivity and limits its application. Summary of the invention
- the object of the present invention is to overcome the above deficiencies of the prior art, and to provide a high-sensitivity rare earth nanomaterial labeling biomolecule method which can be used for time-resolved fluorescence immunoassay.
- Another object of the present invention is to provide a time-resolved fluorescence immunoassay method enhanced by dissolution of rare earth nanomaterials.
- a rare earth nanomaterial labeled biomolecule for time-resolved fluorescence immunoassay the biomolecule comprising biotin, avidin, antibody or nucleic acid aptamer; the rare earth nano material containing strontium, barium, One or more of ⁇ and ⁇ .
- the biomolecules are labeled by chemical coordination or physical adsorption.
- the rare earth nano material is selected from the group consisting of rare earth fluorides, oxides, gas oxides, oxychlorides, rare earth phosphates, borate salts, containing one or more of cerium, lanthanum, cerium, lanthanum, Silicate, molybdate, tungstate, carbonate nanocrystals.
- the rare earth nano material is XYF 4 nanocrystals
- the X is selected from one or more of lithium, sodium, potassium, and the like
- the Y is selected from one or more of lanthanum, cerium, lanthanum, and cerium. .
- a method for labeling biomolecules of rare earth nanomaterials for time-resolved fluorescence immunoassay the rare earth nanomaterials labeling biomolecules by chemical coordination method or physical adsorption method, the biomolecules including biotin, avidin, Antibody or nucleic acid aptamer.
- the rare earth nanomaterial contains one or more of ruthenium, osmium, iridium and osmium.
- the rare earth nano material is selected from the group consisting of rare earth fluorides, oxides, oxyfluorides, oxychlorides, rare earth phosphates, borate salts, containing one or more of cerium, lanthanum, cerium, lanthanum, Silicate, molybdate, tungstate, carbonate nanocrystals.
- the rare earth nano material is preferably XYF 4 nanocrystals, and the X is selected from one or more of lithium, sodium, potassium, and the like, and the Y is selected from one of lanthanum, cerium, lanthanum, and cerium. Kind or more.
- the invention also provides the following technical solutions:
- a time-resolved fluorescence immunoassay method for enhancing rare earth nanomaterials by dissolution characterized in that the method employs the above-mentioned rare earth nanomaterial-labeled biomolecules for time-resolved fluorescence immunoassay.
- the method comprises: adding the above-mentioned rare earth nano material labeled biomolecule for time-resolved fluorescence immunoassay, forming an immune complex, adding a reinforcing liquid, dissolving the rare earth nano material and presenting it as a rare earth ion, and enhancing
- the chelate in the liquid forms a molecule with a strong fluorescent signal (rare earth nanomicelle), and the fluorescence signal is detected by time-resolved.
- the biomolecule when the antigen to be tested is added, the biomolecule is selected from biotin, avidin, antibody or nucleic acid aptamer.
- the biomolecule when the antibody to be tested is added, the biomolecule is selected from biotin, avidin or a nucleic acid aptamer.
- the step 4) can be:
- the above rare earth nanomaterial-labeled antibody for time-resolved fluorescence immunoassay is added to form an immune complex.
- the step 4) can also be decomposed into the following steps:
- the step 4) can also be decomposed into the following steps:
- the rare earth nanomaterial contains one or more of ruthenium, osmium, iridium and osmium.
- the rare earth nano material is selected from the group consisting of rare earth fluorides, oxides, oxyfluorides, oxychlorides, rare earth phosphates, borate salts, containing one or more of cerium, lanthanum, cerium, lanthanum, Silicate, molybdate, tungstate, carbonate nanocrystals.
- the rare earth nano material is preferably XYF 4 nanocrystals, and the X is selected from one or more of lithium, sodium, potassium, and the like, and the Y is selected from the group consisting of ruthenium, osmium, iridium, and osmium. One or more of them.
- the labeling method of the rare earth nano material and the biotin, avidin, antibody or nucleic acid aptamer is: chemical coordination or physical adsorption.
- the blocking solution is a conventional solution in the art and can be synthesized commercially or by itself.
- the blocking solution may be a bovine serum albumin (BSA) blocking solution or an ethanol sputum blocking solution.
- BSA bovine serum albumin
- the reinforcing liquid may be a conventional reinforcing liquid in the art, but preferably consists mainly of a buffer, a ⁇ -diketone body, a nonionic surfactant and a synergist.
- the buffer is selected from the group consisting of Triton X-100; the ⁇ -diketone body is selected from trioxane naphthoic acid, the nonionic surfactant is selected from octyl phosphine oxide, and the synergist is selected. From the water.
- the reinforcing liquid consists essentially of Triton®-100, tri-naphthyl naphthoate, octylphosphine oxide and distilled water.
- the detection mode includes a sandwich method detection, a direct method detection or a competition method detection.
- the XYF 4 nanocrystals can be prepared by methods known to those skilled in the art, for example, by the following methods:
- the biomolecule may be labeled by chemical coordination method, which is a method known to those skilled in the art, and the biotin is labeled by NaEuF 4 nanocrystal chemical coordination method as follows:
- step 2) Take step 1) Synthesize water-soluble nanocrystals, add biotin and ammonia water, sonicate, centrifuge with deionized water, and finally dissolve in deionized water.
- the biomolecule may be labeled by a physical adsorption method, which is a method known to those skilled in the art, and is exemplified by a NaEuF 4 nanocrystal physical adsorption method for labeling an antibody as follows:
- step 1) Take the step 1) synthesized water-soluble nanocrystals, add the antibody, add phosphate buffer, shake at room temperature, collect the nanoparticles by centrifugation, wash with water, dissolve in buffer.
- the beneficial effects of the invention are: 1) using rare earth nanomaterials as markers to label biomolecules, because the rare earth nanomaterials have stable properties, large specific surface area, strong modification, low cost, and each nanoparticle contains thousands of rare earth ions, which greatly improves The marking ratio of rare earth ions is less affected by the external rare earth ions, and is not affected by the anticoagulant, and has wider applicability.
- the detection sensitivity of the present invention is 900 times higher than the commercially available time-resolved carcinoembryonic antigen detection kit.
- FIG 1 (a) Schematic diagram of the traditional dissociation-enhanced time-resolved immunoassay (DELFIA).
- the antigen to be tested or the antibody to be tested is labeled with (a) rare earth chelate or (b) rare earth nano material by double-anti-sandwich method, and the enhancement solution is added after the immune complex is formed, and the fluorescence signal is detected by time resolution.
- a single rare earth nanoparticle contains thousands of rare earth ions, which greatly increases the marking ratio of the rare earth ions, and forms a large amount of strong fluorescent signal molecules after adding the reinforcing liquid, thereby significantly enhancing the fluorescence signal and the detection sensitivity.
- Figure 2 NaEuF 4 nanocrystal transmission electron micrograph, instrument model is JEM-2010, manufacturer is JEOL.
- Figure 4 Standard curve of carcinoembryonic antigen detection by double-antibody sandwich method of the present invention.
- Figure 5 Commercially available time-resolved carcinoembryonic antigen assay kit for detection of carcinoembryonic antigen standard curve. detailed description
- a method for dissolving and enhancing time-resolved fluorescence immunoassay of rare earth nanomaterials the specific steps are as follows:
- step 1 Weigh 20 mg of NaEuF 4 nanocrystal synthesized in step 1 and dissolve it in 15 ml of Hl. O in ethanolic hydrochloric acid solution, sonicate for 30 min, collect the nanoparticles by centrifugation, and wash it three times with absolute ethanol to remove oleic acid on the surface of the nanocrystal. Add 2ml of deionized water to dissolve, which is 10mg/ml water-soluble nanocrystal;
- step 2) Add 1 mmol of biotin and 2 drops of ammonia in step 1), sonicate for 20 min, centrifuge three times with deionized water, and finally dissolve in lml of deionized water for use.
- step A-1) synthesized water-soluble nanocrystal lml, add ⁇ antibody, add ⁇ , ⁇ 8.0 phosphate buffer, room After shaking for 1 h, the nanoparticles were collected by centrifugation, washed three times with water, and dissolved in a buffer of pH 8.0 for use.
- Blocking Prepare 2% bovine serum albumin with 0.05 mol/L carbonate buffer, add 300 ul per well, incubate for 37 hours at 37 °C, remove the liquid from the well, and wash 3 times with PBST wash buffer.
- the concentration of carcinoembryonic antigen is linearly related to the fluorescence intensity.
- step 3 Determination of the sample: In step 3), add the sample to be tested, and the other steps are the same as above, and the fluorescence intensity of the sample to be tested is brought into the standard curve equation to obtain the corresponding concentration value.
- step 4) can also be implemented as follows:
- biotin-labeled antibody Prepare/ml biotin-labeled antibody in PBS buffer, add 100 ⁇ 1 per well, incubate for 37 hours at 37", discard the liquid in the well, wash with PBST, buffer Washed 3 times;
- Blocking Prepare 2% bovine serum albumin with 0.05 mol/L carbonate buffer, add 300 ul per well, incubate for 1 hour at 37"C, remove the liquid in the well, wash with PBST wash buffer 3 Times.
- a standard solution of 0.0128 ng/mK 0.32 ng/mK 1.6 ng/mK 8 ng/ml was incubated for 1 hour at 37 Torr, and the liquid in the well was discarded and washed 3 times with PBST washing buffer.
- Biotin-labeled antibody Prepare /ml biotin-labeled antibody in PBS buffer, add 100 ⁇ l per well, incubate for 37 hours at 37 °C, discard the liquid in the well, and wash 3 times with PBST wash buffer.
- Adding reinforcement solution Add 200ul of enhancement solution per well, and use time-resolved detection of fluorescence signal.
- the specific parameters are: excitation wavelength 340nm, emission wavelength 615nm, delay time 250 ⁇ .
- the concentration of carcinoembryonic antigen is linearly related to the fluorescence intensity.
- Example 3 Example 3:
- the invention compares the recovery rate of different specimens with the commercially available time-resolved carcinoembryonic antigen detection kit.
- Blocking Prepare 2% bovine serum albumin with 0.05mol/L carbonate buffer, add 300ul per well, incubate for 1 hour at 37"C, remove the liquid in the well, wash the detergent buffer with PBST Wash 3 times.
- Enhancement liquid Add 200ul of enhancement solution per well, and use time-resolved to detect fluorescence signal. The specific parameters are: excitation wavelength 340nm, emission wavelength 615nm, delay time 250 ⁇ .
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JP2017501447A JP6563475B2 (ja) | 2014-03-27 | 2014-08-22 | 希土ナノマテリアル溶解・増強時間分解蛍光免疫測定法 |
EP14887401.9A EP3124971A4 (en) | 2014-03-27 | 2014-08-22 | Dissolution enhancing time-resolved fluorescence immunoassay for rare earth nano material |
US15/128,803 US10520495B2 (en) | 2014-03-27 | 2014-08-22 | Dissolution-enhanced time-resolved fluoroimmunoassay based on rare earth nanomaterial |
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CN201410118864.3A CN103969432B (zh) | 2014-03-27 | 2014-03-27 | 一种稀土纳米材料溶解增强时间分辨荧光免疫分析方法 |
CN201410118864.3 | 2014-03-27 |
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EP (1) | EP3124971A4 (zh) |
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Cited By (1)
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CN103969432B (zh) * | 2014-03-27 | 2016-02-17 | 中国科学院福建物质结构研究所 | 一种稀土纳米材料溶解增强时间分辨荧光免疫分析方法 |
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CN107012210A (zh) * | 2017-03-22 | 2017-08-04 | 中国科学院福建物质结构研究所 | 一种基于稀土纳米材料荧光放大的microRNA检测方法 |
WO2020047735A1 (zh) * | 2018-09-04 | 2020-03-12 | 广州源起健康科技有限公司 | 一种基于磁微粒的时间分辨荧光免疫检测方法 |
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CN110180031A (zh) * | 2019-06-05 | 2019-08-30 | 上海纳米技术及应用国家工程研究中心有限公司 | 一种稀土席夫碱类发光材料用于标记可降解椎间融合器的制备方法 |
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KR102464243B1 (ko) * | 2020-04-01 | 2022-11-08 | 프리시젼바이오 주식회사 | 외상성 뇌손상 바이오마커 검출용 시분해 형광분석 측방유동 분석장치 및 이를 이용한 외상성 뇌손상 바이오마커 측정방법 |
CN114675026A (zh) * | 2022-04-13 | 2022-06-28 | 复旦大学 | 一种溶解增强长余辉发光检测方法 |
CN115097117A (zh) * | 2022-06-28 | 2022-09-23 | 四川大学 | 基于铽离子荧光核酸探针及汞离子均相免标记检测方法 |
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- 2014-03-27 CN CN201410118864.3A patent/CN103969432B/zh active Active
- 2014-08-22 WO PCT/CN2014/085075 patent/WO2015143830A1/zh active Application Filing
- 2014-08-22 JP JP2017501447A patent/JP6563475B2/ja not_active Expired - Fee Related
- 2014-08-22 US US15/128,803 patent/US10520495B2/en active Active
- 2014-08-22 EP EP14887401.9A patent/EP3124971A4/en active Pending
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CN103969432A (zh) | 2014-08-06 |
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US10520495B2 (en) | 2019-12-31 |
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