EP3673268A1 - Mittel und verfahren zur detektion von analyten mittels makroskopischer granulat-partikel - Google Patents
Mittel und verfahren zur detektion von analyten mittels makroskopischer granulat-partikelInfo
- Publication number
- EP3673268A1 EP3673268A1 EP17768986.6A EP17768986A EP3673268A1 EP 3673268 A1 EP3673268 A1 EP 3673268A1 EP 17768986 A EP17768986 A EP 17768986A EP 3673268 A1 EP3673268 A1 EP 3673268A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- analyte
- detection
- granules
- sample
- macroscopic
- 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.)
- Pending
Links
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
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54313—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being characterised by its particulate form
- G01N33/54326—Magnetic particles
Definitions
- the present invention relates to the use of a magnetically separable macro-granules polymer-based for performing immunoassays for the detection of various analytes for medical, biological, biotechnological areas.
- Immunoassays and their derivatives are always used when the analyte is not in the form of a nucleic acid that could be amplified for detection by molecular biology techniques. This concerns the detection of different molecules, such. Hormones, toxins, alcohols and proteins in general.
- Immunoassays are also used as so-called rapid tests when a quick detection z. B. a whole cell or a virus particle is sought.
- detection technologies include ELISAs (for detection of proteins or nucleic acids, R. Yalow, et al., J. Clin. Invest .. 39, 1157-75 (1960), blotting techniques (for detecting proteins and nucleic acids Southern, EMJ Mol. Biol., 98: 503-517 (1975); Alwine JC et al., Proc. Natl. Acad., U.S.A., 74, 5350-5354 (1977): Renart, J. et al., Proc. Natl.
- Sample volume provide for the use of beads to which the analyte is bound [2].
- the size of the beads used is in the range of micrometers and nanometers. This seems very advantageous at first, since beads have a very large surface area with a small total volume.
- the antibodies coupled with beads are added to the sample and then fed together with the antigen bound thereto either by centrifugation or by magnetic separation to the further detection method.
- beads are also used for the separation of various sample constituents, e.g. Exosomes, cells and molecules used. The separation of the beads from a solution but is always problematic, especially as beads in the micrometer or
- pipette tips offer protection against cross-contamination, the usable volume of the sample material is very limited (the authors use a 30 ⁇ sample). In addition, this method requires a very complicated apparatus and an extremely complex production of functionalized tips and therefore can not be used cost-effectively / cost-effectively for routine diagnostic applications.
- the object of the present invention is defined by the listed
- the agent according to the invention allows a rapid signal generation, if necessary from a large sample volume without complicated device technology, a very high
- Sensitivity is also suitable for an automated process of any kind. It represents an alternative, novel means of performing previous ELISA applications.
- the means according to the invention for the detection of an analyte uses specific macroscopic granule particles ("MGP"), whereby these particles can have different shapes and sizes, preferably sizes between 1 mm and 5 mm
- the particles may consist of the known materials which have the ability to detect on their surface the functional detection molecules
- the granules used can be separated by means of a magnet.
- a magnet Such a material is known as granules under the trade name TECACOPM®.
- composition of the invention also knows the necessary for ELI SA process coatable surface. After coating, the granules according to the invention can be used for carrying out the detection reaction. This is based on the processes known for ELI SA applications:
- a surface coated granule is contacted with a sample containing an analyte to be detected. This can be done by the granules being free in the sample or by passing the sample past the granules.
- the analyte binds specifically to the granules.
- the granulate is separated from the sample by means of magnetic separation and subsequently washed briefly.
- the granules are then contacted with detection molecules (e.g., HRP-labeled antibody).
- detection molecules e.g., HRP-labeled antibody
- the final proof is e.g. after addition of a substrate solution and by colorimetric measurement of the substrate conversion reaction.
- the analyte bound to the agent of the invention acts as a bridge between the agent of the invention and the other detection components.
- Detection components may be labeled molecules which on the one hand bind specifically to the analyte and on the other hand allow the possibility of detection (e.g.
- the agent according to the invention is ideally suited to enable a detection reaction.
- the granules provide a sufficiently large binding surface for the analyte. It may be because of his
- Sample volume (eg 1 ml - 100 ml) can be used.
- sample volume eg 1 ml - 100 ml
- composition according to the invention over a bead-based ELISA application is that due to the size of the granules, the separation of the granules from the sample takes place very rapidly. In contrast, nano- and micrometer-sized beads take an extremely long time to be separated. Loss of beads does not occur at all. This is a significant problem with small beads.
- a special embodiment for automating the detection method consists in a pipette tip, which is filled with the granules according to the invention.
- the pipetting up and down of the sample enables the desired fluid fluctuation on the surface of the agent according to the invention.
- the granules can also be brought into contact with the detection components.
- the granules can be brought into contact with a large volume of sample even before being transferred to the tip and transferred to the tip after a magnetic separation, which is not the case when using a pipette tip as the solid phase in an ELISA [3] is possible.
- the agent according to the invention is particularly suitable for use e.g. for online monitoring in flow systems.
- the binding of the analyte to the agent according to the invention takes place within a bypass line and the analyte can subsequently be detected within the shortest possible time outside the line.
- Embodiment 1 The invention will be described below with reference to examples. The embodiments do not represent a limitation of the invention. Embodiment 1
- CRP C-reactive protein
- the detection limit of CRP in commercial assays is 1 mg / L.
- a polypropylene magnetic granulate (diameter about 4 mm) was incubated with anti-CRP antibody (Senova GmbH) for 5 hours. The antibody attached to the granule surface through hydrophobic interactions. Subsequently, the functionalized granules were blocked. One functionalized granule was used per detection reaction. The second anti-CRP antibody was conjugated with HRP (horseradish peroxidase) for later colorimetric detection.
- HRP horseradish peroxidase
- the immunoassay was carried out as follows:
- a magnetic granule bead was contacted with 50 ⁇ CRP antigen from the dilution series and 150 ⁇ PBS.
- the magnetic granules were transferred to an ELISA reader-compatible microtiter plate.
- FIG. 1 shows the representation of the measured values minus idle control.
- the experiment demonstrates a low-background detection of the antigen CRP to the detection limits, which are below the detection limit of conventional CRP ELISA.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- the antigen CRP was prepared at a concentration of 0.03 mg / L.
- the magnetic granules were incubated with the following volumes of the sample:
- FIG. 2 shows the representation of the measured values minus the blank value.
Landscapes
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Chemical & Material Sciences (AREA)
- Hematology (AREA)
- Urology & Nephrology (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- Cell Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2017/071479 WO2019042521A1 (de) | 2017-08-26 | 2017-08-26 | Mittel und verfahren zur detektion von analyten mittels makroskopischer granulat-partikel |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3673268A1 true EP3673268A1 (de) | 2020-07-01 |
Family
ID=59914422
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17768986.6A Pending EP3673268A1 (de) | 2017-08-26 | 2017-08-26 | Mittel und verfahren zur detektion von analyten mittels makroskopischer granulat-partikel |
Country Status (4)
Country | Link |
---|---|
US (1) | US20210063387A1 (de) |
EP (1) | EP3673268A1 (de) |
CN (1) | CN111615632A (de) |
WO (1) | WO2019042521A1 (de) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1582956A (en) * | 1976-07-30 | 1981-01-21 | Ici Ltd | Composite magnetic particles |
CA1316212C (en) | 1987-05-05 | 1993-04-13 | Edward Bakewell Weiler | Cycling biochip sensor |
US4956302A (en) | 1987-09-11 | 1990-09-11 | Abbott Laboratories | Lateral flow chromatographic binding assay device |
JP3624543B2 (ja) * | 1996-05-02 | 2005-03-02 | 東ソー株式会社 | 免疫反応試薬及びその製造方法 |
US6506564B1 (en) | 1996-07-29 | 2003-01-14 | Nanosphere, Inc. | Nanoparticles having oligonucleotides attached thereto and uses therefor |
US6566145B2 (en) * | 2000-02-09 | 2003-05-20 | William E Brewer | Disposable pipette extraction |
JP4072994B2 (ja) * | 2001-10-11 | 2008-04-09 | 学校法人日本大学 | 磁性粒子 |
US8053247B2 (en) * | 2006-10-11 | 2011-11-08 | Phynexus, Inc. | Method and device for preparing an analyte for analysis by mass spectrometry |
WO2015133507A1 (ja) * | 2014-03-05 | 2015-09-11 | Jsr株式会社 | 固相担体、リガンド結合固相担体、標的物質の検出又は分離方法、固相担体の製造方法、及びリガンド結合固相担体の製造方法 |
-
2017
- 2017-08-26 CN CN201780096234.2A patent/CN111615632A/zh active Pending
- 2017-08-26 WO PCT/EP2017/071479 patent/WO2019042521A1/de unknown
- 2017-08-26 US US16/641,951 patent/US20210063387A1/en active Pending
- 2017-08-26 EP EP17768986.6A patent/EP3673268A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
US20210063387A1 (en) | 2021-03-04 |
WO2019042521A1 (de) | 2019-03-07 |
CN111615632A (zh) | 2020-09-01 |
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