WO2014041145A1 - Procede et dispositif de mesure quantitative par libs de cibles biomoleculaires sur bio-puce - Google Patents
Procede et dispositif de mesure quantitative par libs de cibles biomoleculaires sur bio-puce Download PDFInfo
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- WO2014041145A1 WO2014041145A1 PCT/EP2013/069072 EP2013069072W WO2014041145A1 WO 2014041145 A1 WO2014041145 A1 WO 2014041145A1 EP 2013069072 W EP2013069072 W EP 2013069072W WO 2014041145 A1 WO2014041145 A1 WO 2014041145A1
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- 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
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/718—Laser microanalysis, i.e. with formation of sample plasma
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- 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
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/714—Sample nebulisers for flame burners or plasma burners
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- 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
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/73—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using plasma burners or torches
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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
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6803—General methods of protein analysis not limited to specific proteins or families of proteins
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2201/00—Features of devices classified in G01N21/00
- G01N2201/06—Illumination; Optics
- G01N2201/061—Sources
- G01N2201/06113—Coherent sources; lasers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/46—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans from vertebrates
- G01N2333/47—Assays involving proteins of known structure or function as defined in the subgroups
- G01N2333/4701—Details
- G01N2333/4731—Casein
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2570/00—Omics, e.g. proteomics, glycomics or lipidomics; Methods of analysis focusing on the entire complement of classes of biological molecules or subsets thereof, i.e. focusing on proteomes, glycomes or lipidomes
Definitions
- the present invention relates to a method and a device for quantitatively measuring biomolecular targets on a biochip. It applies in particular to the field of proteomics, and more particularly to the quantitative measurement of protein phosphorylation by laser-induced plasma optical emission spectroscopy technique.
- phosphorylation of proteins is a cognitively important point of view in the field of modern biology, or diagnostics in the field of therapeutics. This function is indeed essential in many biological processes, such as epigenetic regulation, nutritional regulation, DNA repair, hormonal regulation, etc. No known simple and direct technique can identify a protein in a biological medium and evaluate its phosphorylation rate.
- a known technique of analysis consists in analyzing protein extracts by capturing them on so-called “spot” sites (each spot being constituted by a plurality of identical probes) organized in a network on a medium commonly referred to as "bio- chip "or" micro-array "according to English terminology.
- the targets sought in the protein extracts to be analyzed are identified by specific probes that may be antibodies, receptors or any other molecules associating specifically with a given protein or one of its modifications.
- the carrier is called an "antibody biochip”.
- a plurality of target biomolecules can thus be analyzed simultaneously or almost simultaneously by appropriate analysis techniques.
- Various techniques make it possible to perform the actual analysis of the elements thus retained or “segregated” on an antibody biochip.
- a known technique For the analysis of phosphorylation of nucleic acids on a biochip, a known technique consists in carrying out this analysis by a laser-induced plasma optical emission spectroscopy technique commonly known by the acronym "LIBS" corresponding to the English terminology " Laser-Induced Breakdown Spectroscopy.
- LIBS laser-induced plasma optical emission spectroscopy
- This technique involves ablating, by means of a laser beam, the segregated sample on the surface of the bio-chip and generating a plasma, this plasma being then analyzed by a spectroscopic method.
- the emission spectrum of the desired chemical elements can be recorded, as well as the focus coordinates of the laser beam on the surface of the sample. Suitable calculation means can then make it possible to establish an elementary map of the surface of the sample.
- a device and a method for quantitatively measuring the biomolecular targets present on a biological analysis support are for example described in the patent application published under the reference FR 292901 1.
- An analysis device by LIBS is for example described in the patent application published under the reference FR 2964458.
- a LIBS analysis of protein phosphorylation on a biochip poses several problems a priori.
- a first problem is related to the presence of exogenous phosphorus, masking the desired signal.
- a second problem is related to the fact that the supports usually used for the biological analyzes are not compatible with a LIBS analysis, the plasmas forming on this type of support being not analyzable under acceptable conditions.
- a third problem is related to the fact that biological molecules such as proteins have a very small amount of phosphorus in their structure, which is difficult to detect by LIBS.
- a fourth problem is related to the fact that the signal obtained does not vary in an easily modelable manner, for example in a linear manner, as a function of the desired quantity: in other words, the normalization of the signal for the quantification of a protein is problematic.
- An object of the present invention is to overcome at least the aforementioned drawbacks, by proposing a method and a device for the quantitative analysis of biomolecular targets by a LIBS technique.
- This invention implements an adequate support and a method for the formation of a readily analyzable plasma by spectrometry, the LIBS signal emitted by the plasma being proportional to the abundance of the desired quantity.
- the subject of the invention is a method and a device for quantitative measurement. More specifically, the subject of the present invention is a method for the quantitative analysis by optical emission spectrometry of a plasma induced by a laser beam of at least one target included in a biochip, characterized in that it the use of an adjuvant allowing the formation of a dry matrix able to be ablated simultaneously with the said at least one target, the dry matrix being configured to improve the analytical properties of the plasma, the adjuvant having an emission spectrum whose lines have wavelengths distinct from the wavelengths of the spectral lines used for the quantitative analysis of said at least one target.
- said at least one target can be segregated on the bio-chip by at least one probe so that a probe-target complex is formed between each probe and the corresponding target.
- said use of an adjuvant can allow the formation of a dry matrix of amorphous structure.
- said use of an adjuvant can allow the formation of a dry matrix of crystalline structure.
- the dry matrix may be formed so that the probe-target complexes are disposed on the surface of a support, and are wholly or partially encompassed by a volume of said dry matrix.
- the dry matrix and the probes can be fixed on a support.
- the adjuvant molecules forming the dry matrix can be directly complexed to the probes.
- the dry matrix adjuvant molecules can be attached to a support with the probes attached to the adjuvant molecules with the adjuvant molecules attached to the support.
- a dry matrix layer may be formed by placing an adjuvant layer on the surface of the support, prior to the arrangement of the probes on the dry matrix surface thus formed on the surface of a support.
- the dry matrix may be formed by a compound whose absorption wavelengths are close to the wavelength of the laser beam, such as the wavelength used for the laser is included in the absorption spectrum of the dry matrix.
- the adjuvant may comprise a solution of water and an element of the group comprising the sugar, polysaccharide, disaccharide.
- each probe may be labeled with an internal standardization standard.
- each probe may be labeled by the graft normalization element.
- the normalizing element may be formed of boron.
- the present invention also relates to a device comprising a support comprising a plurality of sites, each site comprising a plurality of probes, the probes being grafted concomitantly with the molecules of an adjuvant for the formation of a dry matrix.
- said support may comprise organic compounds, monolithic or organo-diamond compounds.
- the present invention also relates to a solution for the implementation of a method according to any one of the embodiments described, characterized in that it comprises an adjuvant for the formation of a dry matrix.
- the solution for implementing a method according to one of the embodiments described can to comprise a determined proportion of a standardization element of an optical signal of a plasma induced by a laser beam
- Another advantage provided by the present invention is that it allows simple, rapid, quantitative and vector analysis of biomolecules, for example proteins, and the level of phosphorus in a mixture.
- a quantitative analysis is performed on a biochip comprising a network of targets and / or probes organized into spots.
- the spots of each probe are capable of recognizing and segregating a target bio-molecule present in the mixture to be analyzed.
- an adjuvant be implemented to allow the formation of a dry matrix, the latter being intimately linked with the targets or with the probe-target complexes.
- the term "intimately related” is understood to mean that the dry matrix supports, encompasses or surrounds target or target probe complexes, such that the laser ablation of the target or probe-target complex and the plasma produced by LIBS at a spot of the biochip network comprises, in addition to target biomolecules or target-probe complexes, adjuvant molecules and / or their decomposition elements.
- a dry matrix is in the form of a solid compound of crystalline or amorphous form after drying of the bio-chip.
- the dry matrix may be in the form of an adduct, that is to say a mixture of probes, targets and adjuvant molecules, a crystalline phase or amorphous mixed or encompassing targets and / or probes.
- adduct that is to say a mixture of probes, targets and adjuvant molecules, a crystalline phase or amorphous mixed or encompassing targets and / or probes.
- Different configurations of the dry matrix on the support of the bio-chip are described hereinafter by way of examples, with reference to FIGS. 2A to 2D. It should be observed that a method or a device according to the present invention can also be applied to a biochip comprising a plurality of targets deposited or segregated on a support, not necessarily associated with probes.
- the adjuvant is in particular selected so as to be substantially non-phosphorus, and so that it does not denature the antigen-antibody binding. That is to say, on the one hand, that the emission spectra of the molecules the adjuvant and the matrix itself are distinct from the emission lines used to quantify the phosphorus and, if appropriate, to normalize the signal, and secondly that the adjuvant is compatible with the hybridization or complexation of the targets and / or target probe complexes.
- the adjuvant used for the formation of the dry matrix may for example be soluble. Examples of suitable solutions are described below.
- the dry matrix is furthermore chosen so as to have the further advantage of improving the analytical properties of the plasma produced by laser for the analysis by a spectroscopy technique.
- the dry matrix may be formed by a compound whose absorption wavelengths are close to the wavelength of the laser beam used, such that the wavelength used for the laser is included in the spectrum of the laser. absorption of the dry matrix.
- FIG. 1 a flowchart illustrating a method of analysis, according to a exemplary embodiment of the present invention
- FIG. 2 a diagram illustrating the general principle of a method of analysis on a biochip comprising probes / targets according to an exemplary embodiment of the present invention
- FIGS. 3A, 3B, 3C and 3D diagrams schematically illustrating an analysis device according to different configurations, according to exemplary embodiments of the present invention
- FIGS. 4A and 4B diagrams schematically illustrating an analysis device further comprising a normalization element, in configurations corresponding respectively to FIGS. 3A and 3C.
- an analysis method may comprise a first step 101 for preparing the bio-chip.
- the first step 101 can be followed by a second step 102 of analysis by LIBS, during which a plasma is formed in particular at the level of the target biomolecules to be analyzed by means of an ablation laser, according to techniques that are themselves known.
- the preparation step 101 may comprise a first substep of depositing the biomolecules, i.e., single targets and / or probes on a support, followed by drying; a second sub-step may consist, after a possible saturation sub-step, segregating on the support a plurality of target biomolecules optionally by coupling them to corresponding y antibodies, forming a matrix of probes. Each target biomolecule is thus fixed on a probe recognizing it arranged on the support.
- a dry matrix is also formed, according to a specificity of the present invention.
- the dry matrix formed makes it possible to ensure better exploitability by optical emission spectrometry of the plasma produced by laser during the second step 102.
- the dry matrix is formed so that it can be ablated simultaneously with a target or probe-probe complex. target.
- a shot of the ablation laser targeting the target biomolecule of interest ensures the removal of a portion of the surrounding dry matrix.
- the dry matrix may be arranged to completely or partially encompass the target biomolecule or probe-target complex.
- the dry matrix may also be disposed below the target biomolecule or the probe-target complex, provided that the proximity of the dry matrix is sufficient for a laser shot for the target biomolecule or probe-target complex. also ablates part of the surrounding dry matrix.
- Different possible configurations of the dry matrix with respect to a target biomolecule or probe-target complex, on a biochip support are described hereinafter with reference to FIGS. 3A to 3D.
- the dry matrix is further configured to improve the analytical properties of the LIBS plasma. In addition, it must not denature probe-target recognition if necessary, and must not itself contain phosphorus.
- the dry matrix can be amorphous or crystalline, and can be formed by means of an adjuvant.
- the adjuvant may for example be a soluble adjuvant.
- a solution for an analysis method according to one of the embodiments described, comprising a proportion of biomolecules to be analyzed may also comprise the adjuvant allowing the formation of the dry matrix.
- the adjuvant can be introduced into at least one of the solutions used to hybridize the biochip with the target proteins or to flush the biochip after hybridization.
- the adjuvant allows the formation of a dry matrix on the surface of the bio-chip especially at the different spots.
- the adjuvant forming a dry matrix may be introduced during the step of depositing the probes on the support at the time of manufacture of the bio-chip: either by introduction into the deposition solution of probes, just after the deposition of the probes, by chemically grafting the adjuvant molecule directly onto the surface of the support used for fixing the probes.
- sucrose molecules can be grafted onto the surface of the bio-chip activated by SOCI2 through their alcohol function.
- the adjuvant molecules can first be grafted to the surface of the bio-chip support and then activated as needed depending on the nature of the adjuvant, and the probes can be grafted into spots. on the surface of the bio-chip through the adjuvant molecules.
- At least one rinsing or hybridization solution may comprise a metal or halogen standardization element, emitting a signal LIBS distinct from that of phosphorus and proportional to the abundance of said metal element.
- Said normalization element may in particular be chosen so that it is in the same spectral window as the emission line chosen for phosphorus analysis according to the equipment used.
- the emission lines can be distinct in the sense of the spectrograph used, that is to say sufficiently remote for a given spectrograph, so that they can be distinguished.
- the normalization element can be introduced into the adjuvant allowing the formation of the dry matrix.
- the normalization element may for example be boron, taken alone, integrated in a molecule or trapped in a molecular cage or crypt, and reproducibly bound to the target.
- the normalization element such as boron may be directly complexed with the antibody of the probe, or possibly with the target.
- the support forming the bio-chip may be a free carbon support of phosphorus, comprising organic compounds, that is to say any combination of the elements Carbon, Hydrogen, Oxygen and Nitrogen.
- the support forming the bio-chip may be monolithic (such as diamond), glassy, or organo-diamond, promoting the formation of a plasma exploitable in good conditions. It may be a support consisting of monolithic nanoparticles covered with probes deposited or grafted onto a vitreous or organic support.
- the adjuvant introduced above is itself configured so as not to denature the probe-target bond, and not to contain phosphorus.
- the adjuvant may for example be formed by polysaccharides, such as sucrose or any other polysaccharide not containing phosphorus.
- the second step 102 above allows analysis by LIBS-type spectrometry, using appropriate devices, and may include process sub-steps in themselves known.
- the second step 102 involves the implementation of analysis means by LIBS spectrometry, including in particular means for emitting an intense pulsed laser beam or "beam ablation means, means for moving the sample to be analyzed, means for detecting recording and calculation.
- Figure 2 shows a diagram illustrating the general principle of an analysis method according to an embodiment of the present invention.
- a plurality of target proteins 201 may be deposited in a plurality of spots on a support 200 of a biochip.
- the support 200 further comprises a plurality of probes 21 1 capable of recognizing the target proteins 201.
- An analysis method according to the present invention implements the use of an adjuvant 202, for example soluble, allowing the formation of a dry matrix 203, completely encompassing the probe-target complexes in the example illustrated by FIG. 2.
- the biochip comprising a plurality of target proteins 201, as well as a plurality of probes 21 1 in the non-limiting illustrated example. of the present invention, can be subjected to an analysis by LIBS during the second step 102 mentioned above and described with reference to FIG.
- FIGS. 3A to 3D show diagrams schematically illustrating an analysis device according to different exemplary embodiments of the present invention, corresponding to different configurations of the dry matrix and the support of the bio-chip.
- each target biomolecule 201 attached to a probe 21 1 the recognizing disposed on the support 200 of the bio-chip may be encompassed by a volume of dry matrix 203 formed by a suitable adjuvant as described above.
- the target probe-biomolecule pair 21 1, 201 may be completely encompassed by the dry matrix, as well as in the example illustrated by the figure, or only partially encompassed by it.
- FIG. 3A According to an embodiment illustrated in FIG. 3A, corresponding to a first configuration of the target biomolecules, corresponding probes and of the dry matrix on the support of the bio-chip, each target biomolecule 201 attached to a probe 21 1 the recognizing disposed on the support 200 of the bio-chip, may be encompassed by a volume of dry matrix 203 formed by a suitable adjuvant as described above.
- the target probe-biomolecule pair 21 1, 201 may be completely encompassed by the dry matrix, as well as in the example illustrated by the figure, or only partially encompassed by it.
- FIG. 3A According to an embodiment
- the support 200 of the bio-chip, on which the probes for forming the target probe-biomolecule pairs 21 1, 201, can be placed on its surface be saturated with the dry matrix 203.
- an adjuvant layer may for example be placed on the surface of the support 200 of the bio-chip already populated with target probe-biomolecule couples 21 1, 201.
- Such an embodiment may have an advantage in terms of simplicity of implementation, the entire surface of the support 200 of the bio-chip can be saturated with the dry matrix 203.
- each probe-target biomolecule couple 21 1, 201 disposed on the support 200 of the bio-chip can be included in the dry matrix 203, the adjuvant forming the dry matrix 203 which can be directly complexed with the probe 21 1.
- a dry matrix layer 203 may be formed by disposing or grafting an adjuvant layer, for example uniformly on the surface of the support 200 of the bioparticle. chip, in advance of the arrangement of the probes 21 1 grafted directly on the matrix.
- the target biomolecule complexes or hybridizes to the corresponding probe directly on the dry matrix.
- An alternative mode may consist of grafting the probes onto the support and then grafting onto the support the molecules of the matrix so as to surround the targets.
- the fourth embodiment has a substantial advantage from an industrial point of view. Indeed, kits comprising a bio-chip on the support of which was formed the dry matrix layer 203 can be supplied, like conventional biochips. An operator can then normally have target probe-biomolecule pairs on the surface of such a biochip by proceeding in a usual manner.
- the present invention also relates to a device or "kit" for pre-hybridization or hybridization of biochips such as at least one solution for the pre-hybridization, hybridization or rinsing of a bio-chip comprising an adjuvant allowing the formation of a dry matrix on the surface of the bio-chip.
- the subject of the present invention is also a bio-chip, the support of which comprises on its surface a dry matrix layer 203.
- the thickness of the dry matrix 203 formed above the target biomolecules may be on average not greater than 1 millimeter.
- the plasma formed by the laser could indeed not contain traces of the target biomolecule in reasonable proportions for an analysis to be possible.
- each probe 21 may advantageously comprise a normalization element forming an internal standard for normalizing the signal obtained by LIBS.
- the normalization element may be formed by an element directly complexed with each probe 21 1, for example by a grafting technique. If the probe 211 is formed by an antibody, the antibody can thus be directly labeled by the graft normalization element.
- the normalization element may for example be formed by an element such as boron.
- a normalization element 405 may be attached directly to a probe 21 1 disposed on the support 200, for example by a grafting technique.
- the assembly formed by the probes 21 1, the targets 201 may be encompassed by the dry matrix 203, in a configuration corresponding to the first configuration described above with reference to Figure 3A.
- a normalization element 405 can be attached directly to a probe 21 1 disposed on the support 200, for example by a grafting technique.
- the adjuvant molecules forming the In such an example, the dry matrix 203 may be directly complexed with the probes 21 1, in a configuration corresponding to the third configuration described above with reference to FIG. 3C.
- the spectral lines of the adjuvant have wavelengths distinct from the wavelengths of the spectral lines used for the quantitative analysis, including the spectral lines used for the normalization and the spectral lines used for the quantification of the target and / or its post-translational modifications.
- the Applicant has qualified the analysis method by carrying out in particular an analysis of the phosphorylated protein, more specifically on an in vitro model reconstituted from a beta A2 casein protein in which solutions of known concentrations of qualified casein by an inductively coupled emission spectrometric analysis method, commonly referred to as "ICP-AES" corresponding to the English terminology "Inductively Coupled Plasma - Atomic Emission Spectrometry", are analyzed; and on the other hand in a biological model containing exogenous phosphorus for which the phosphorylation rate of a molecular target H2AX can be induced at will.
- ICP-AES inductively coupled emission spectrometric analysis method
- Example of target deposits on bio-chip protein chip without probe.
- beta A2 casein The molecular weight of beta A2 casein is 23.983 kiloDalton.
- This protein may, for example, be supplied in a freeze-dried form, and then purified for example by a method commonly known by the acronym "HPLC” corresponding to the English terminology "High Performance Liquid Chromatography” or high performance liquid chromatography, for example using a solution comprising water (H 2 0), trifluoroacetic acid (TFA) and methyl cyanide (or acetonitrile).
- HPLC high Performance Liquid Chromatography
- the concentration of the protein may for example be determined by means of a UV spectrophotometer.
- an analysis of beta-casein phosphorylation can be carried out by a known alternative method and deemed reliable in order to provide reference measurements.
- an ICP-AES type of analysis method this method being a reference method for the determination of the elemental composition of liquid compounds.
- the Applicant has carried out the ICP-AES analysis of beta casein solutions with concentrations of 0, 4, 12 and 20 ⁇ (micromoles).
- beta casein In order to determine the sensitivity of the LIBS spectrometry for the quantification of the phosphorylation of proteins, different amounts of beta casein are directly deposited on the Kapton-epoxy support, the Kapton-epoxy film being glued for example by means of a glue. cyanoacrylate on a microscopic glass (for example in the form of a 7.5-cm by 2.5 cm cover).
- the beta casein solution thus obtained is diluted in series at concentrations of 0, 40, 85, 170, 257 and 350 ⁇ in a buffered solution at 0.1 M of tris at a pH of 7.5, this preparation being designated " preparation A "in a buffered solution comprising 0.1 M of tris at a pH of 7.5 and 1 mM of sucrose, designated” preparation B ", and in a buffered solution comprising 0.1 M of tris at a pH of 7, 5, 1 mM sucrose and 0.5 mM boron, designated "preparation C”.
- preparations were separately deposited into five replicas on the Kapton-epoxy film and dried for 30 minutes at room temperature.
- Lymphocytes can be isolated by gradient cell separation from heparinized human blood samples.
- the cells are washed twice in phosphate buffered saline or "PBS", diluted to a concentration of 10 6 cells / ml in a cellular medium, for example a medium comprising 10% fetal calf serum or "FCS", 1 % penicillin-streptomycin, and immediately irradiated with a Cobalt 60 irradiator at a dose level of 2 Gray.min "1 to 0, 0.5, 2 and 4 Gray.After their irradiation, the cells are rapidly diluted in a medium cultured at a concentration of 5 ⁇ 10 5 cells / ml and incubated for one hour at a temperature of 37 ° C. in an atmosphere comprising a concentration of 5% of carbon dioxide, before quantifying the level of phosphorylation of ⁇ 2 ⁇ .
- PBS phosphate buffered saline
- FCS 10% fetal calf serum
- Anti- YH2AX ser139 antibody can be chosen for this purpose.
- the dialyzed antibody is then deposited on a Kapton or Kapton-epoxy support, for example a support comprising a Kapton layer of 25 ⁇ , or a Kapton layer of 25 ⁇ coated with an epoxy layer of 25 ⁇ m. ⁇ .
- the antibody is disposed on the Kapton-epoxy film layer.
- a volume of 100 ⁇ l of anti-YH2AX ser139 is dialyzed in a buffered solution of pH 7.5 comprising 0.1 M tris, 1 mM sucrose, for four hours at a temperature of 4 ° C.
- the concentration of the solution of anti-YH2AX ser139 is adjusted to 0.5 mg / ml in 1 mM boron in a buffered solution of 0.1 M tris, and a volume of 1 ⁇ of the solution is placed in each well of the matrix on the Kapton-epoxy film layer and is then dried for 30 minutes at room temperature.
- the free epoxy functions of the medium are saturated with a 1 X super blocking buffer solution or "SBB" according to the acronym for the terminology English "Super Blocking Buffer” in a solution comprising tris, 1 mM sucrose and a concentration of 5% dextran for 30 minutes at room temperature slightly stirred.
- the support can be washed three times in a tris buffered saline solution, or 1 X TBS solution, also comprising 1 mM sucrose and 0.1% polysorbate 20, this solution also being used for washing the matrix.
- 1 X TBS solution also comprising 1 mM sucrose and 0.1% polysorbate 20, this solution also being used for washing the matrix.
- Persistent binding of antibodies to the support can be analyzed by means of a fluorescent scanner, and the absence of phosphorus can be verified by LIBS.
- the lymphocytes are pelleted by centrifugation for two minutes at a speed of 10,000 rpm, placed in a microwave oven at a power of 450 W for 15 seconds, and then put back into position. suspension in a buffered solution comprising 0.1 M tris, 1 mM sucrose at a protein concentration of 1 mg / ml.
- the proteins are diluted to a concentration of 0.1 mg / ml in a buffer solution of 1 X SBB comprising 1 mM sucrose, and incubated for 12 hours at a temperature of 4 ° C.
- the resulting antibody templates are washed in a saline buffered saline solution (1 X TBS) comprising 1 mM sucrose, and 0.1% polysorbate 20, and twice in a saline buffered saline solution (1 X TBS) comprising 1 mM sucrose for 15 minutes with stirring and then dried at room temperature.
- an aliquot of irradiated lymphocytes at each dose is analyzed using a fluorescence activated cell sorter, or "FACS" according to the acronym for "Fluorescence Activated”.
- FACS fluorescence activated cell sorter
- the cells are washed cold in PBS before fixation and permeabilization in ethanol titrating at 70 ° for one hour at a temperature of 4 ° C.
- the cells are then incubated at room temperature with an anti-YH2AX ser139 antibody solution in a PBS comprising 2% FCS.
- the Kapton-epoxy supports where the proteins are fixed can then be analyzed by LIBS, for example by means of a laser microprobe, XY displacement means configured to move the support rapidly and accurately.
- the wavelength of the ablation laser beam used is chosen close to the wavelengths of the compound forming the adduct: for the example described, a neodymium-doped yttrium-aluminum garnet laser, or laser Nd: YAG "of wavelength 266 nm and an energy of 4 mJ per pulse of 5 ns is used.
- Two reflective mirrors can guide the laser beam to scan the surface of the support.
- the laser beam can pass through a diaphragm and then be focused on the surface of the sample to be analyzed by a refractive microscope objective.
- the position of the sample can be visualized and adjusted by the moving means from the images provided by a CCD camera disposed above the laser microprobe.
- the samples can be positioned and fixed by means of fixing means, for example formed by screws, on the XY displacement means.
- the displacement means can operate at a frequency of 10 Hertz, corresponding to the laser firing frequency in an external synchronization mode, with 30 ⁇ displacements between two consecutive laser shots.
- an optical fiber may for example be arranged with an end as close as possible to the plasma, the optical fiber guiding the light coming from the plasma to an inlet slot of a plasma.
- spectrometer equipped with an intensified CCD camera (or "ICCD" camera).
- the spectral resolution may be 0.032 to 410 nm, for an input slot of 100 ⁇ .
- the displacement means and the ICCD camera can for example be controlled by means of suitable control means, for example formed by a single microcomputer.
- the pulsed laser and the ICCD camera can be controlled by control means controlling the entire analysis device.
- a laser shot can be applied, and a spectral window, for example extending in the wavelength range from 248 nm to 258 nm, around the spectral line specific to phosphorus (253.563 nm) can be acquired, and digitized then stored in memory by appropriate means.
- the control means can then force the displacement means to move the sample to a new position.
- a tube can be fixed to a fixed part of the laser microprobe and can be used to form means for generating a gas flow, such as argon, close to the surface of the sample at which the plasma is generated.
- a gas flow such as argon
- IP253 The selected intensities of phosphor lines at 253.563 nm (“IP253”) are treated as net values by subtracting the spectral background intensity corresponding to the mean value of the intensities measured at 254.120 nm and 254.700 nm.
- Target proteins can be quantified by summing all net values of IP253 lines.
- the spectra of phosphorus and boron can be filtered with a reliability factor Cdb determined by means of the following relation:
- C db [ ⁇ l B - N B ) - a N ) / ⁇ (1 B - N B ) + a N )] (1), where IB designates the intensity of the boron, N B and ⁇ denote respectively the mean value and standard deviation of background intensity around wavelengths 249.084 nm and 250.363 nm, calculated on all spectra.
- Phosphorus values for the target protein can then be quantified from the spectra selected from the following relationship:
- IB 24 I 9 and P253 denote the intensity values of the spectral lines of the boron and phosphorus respectively
- nP253 and nB249 designate respectively the average intensity of the bottom around boron and phosphorus in a given spectrum, and corresponding to a scanning pixel of the medium surface by LIBS.
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KR1020157009164A KR102165631B1 (ko) | 2012-09-13 | 2013-09-13 | 바이오칩 상의 생체분자 타겟들의 정량적 libs 측정을 위한 방법 및 디바이스 |
JP2015531584A JP6220878B2 (ja) | 2012-09-13 | 2013-09-13 | バイオチップ上における生体分子ターゲットの定量libs計測のための方法及び装置 |
EP13762488.8A EP2895845A1 (fr) | 2012-09-13 | 2013-09-13 | Procede et dispositif de mesure quantitative par libs de cibles biomoleculaires sur bio-puce |
US14/428,101 US9400252B2 (en) | 2012-09-13 | 2013-09-13 | Method and device for the quantitative LIBS measurement of bio-molecular targets on a biochip |
CN201380054861.1A CN104737001B (zh) | 2012-09-13 | 2013-09-13 | 用于生物芯片上生物分子靶的libs定量测量的方法 |
CA2884867A CA2884867C (fr) | 2012-09-13 | 2013-09-13 | Procede et dispositif de mesure quantitative par libs de cibles biomoleculaires sur bio-puce |
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FR1258608A FR2995403B1 (fr) | 2012-09-13 | 2012-09-13 | Procede et dispositif de mesure quantitative par libs de cibles biomoleculaires sur bio-puce |
FR1258608 | 2012-09-13 |
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JP2016095139A (ja) * | 2014-11-12 | 2016-05-26 | 株式会社島津製作所 | 試験体プレート作製方法とそれにより作製された試験体プレート及びそれが用いられる含有物質計測装置 |
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EP3191840B1 (fr) * | 2014-09-12 | 2020-04-08 | Purdue Research Foundation | Marquage d'anticorps par un métal et détection à base de plasma |
US11353403B2 (en) * | 2018-11-30 | 2022-06-07 | Genentech, Inc. | Vial contents inspection and material identification method and apparatus |
CN113092395A (zh) * | 2021-03-31 | 2021-07-09 | 四川大学 | 一种基于咖啡环的细胞快速分类与定量方法 |
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US5656504A (en) * | 1992-10-26 | 1997-08-12 | Pharmacia Biosensor Ab | Method of preventing undesired binding in solid phase assays |
WO2003025547A1 (fr) * | 2001-09-21 | 2003-03-27 | Biomedlab Corporation | Procede et dispositif permettant de balayer des analytes au moyen de resonance plasmonique de surface |
WO2008156491A2 (fr) * | 2006-09-29 | 2008-12-24 | Zyomyx, Inc. | Dispositifs et procédés pour l'analyse d'échantillons avec épuisement de la teneur en analyte |
FR2929011A1 (fr) | 2008-03-20 | 2009-09-25 | Commissariat Energie Atomique | Procede et dispositif de mesure quantitative a haute cadence de cibles biomoleculaires presentes sur ou dans un support d'analyse biologique. |
US20110000791A1 (en) * | 2009-07-02 | 2011-01-06 | Amic Ab | Capillary driven assay device and its manufacture |
US20110171636A1 (en) * | 2008-09-19 | 2011-07-14 | Delaware State University | Mono- and multi-element coded libs assays and methods |
FR2964458A1 (fr) | 2010-09-06 | 2012-03-09 | Commissariat Energie Atomique | Dispositif de cartographie et d'analyse a haute resolution d'elements dans des solides |
US20120099103A1 (en) * | 2009-07-10 | 2012-04-26 | University Of Florida Research Foundation, Inc. | Method and apparatus to laser ablation-laser induced breakdown spectroscopy |
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DE3809504C1 (fr) * | 1988-03-22 | 1989-09-21 | Bruker - Franzen Analytik Gmbh, 2800 Bremen, De | |
US20060014212A1 (en) * | 2002-05-10 | 2006-01-19 | Epitome Biosystems, Inc. | Proteome epitope tags and methods of use thereof in protein modification analysis |
DE10229498A1 (de) * | 2002-07-01 | 2004-01-22 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren und Vorrichtung zur Durchführung der Plasmaemissionsspektrometrie |
KR20060003373A (ko) * | 2003-05-16 | 2006-01-10 | 오츠카 세이야쿠 가부시키가이샤 | 트랜스크립션 칩 |
FR2906035B1 (fr) * | 2006-09-15 | 2008-11-28 | Commissariat Energie Atomique | Procede de mesure quantitative de cibles biomoleculaires deposees sur une biopuce, et dispositif pour sa mise en oeuvre. |
JP2008256440A (ja) * | 2007-04-03 | 2008-10-23 | Toshiba Corp | 分析装置 |
JP2009288068A (ja) * | 2008-05-29 | 2009-12-10 | Toshiba Corp | 分析方法およびその装置 |
CA2892490A1 (fr) * | 2012-11-26 | 2014-05-30 | Caris Science, Inc. | Compositions de biomarqueur et procedes |
-
2012
- 2012-09-13 FR FR1258608A patent/FR2995403B1/fr active Active
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2013
- 2013-09-13 EP EP13762488.8A patent/EP2895845A1/fr not_active Withdrawn
- 2013-09-13 CA CA2884867A patent/CA2884867C/fr active Active
- 2013-09-13 KR KR1020157009164A patent/KR102165631B1/ko active IP Right Grant
- 2013-09-13 CN CN201380054861.1A patent/CN104737001B/zh not_active Expired - Fee Related
- 2013-09-13 JP JP2015531584A patent/JP6220878B2/ja not_active Expired - Fee Related
- 2013-09-13 US US14/428,101 patent/US9400252B2/en not_active Expired - Fee Related
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Patent Citations (8)
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US5656504A (en) * | 1992-10-26 | 1997-08-12 | Pharmacia Biosensor Ab | Method of preventing undesired binding in solid phase assays |
WO2003025547A1 (fr) * | 2001-09-21 | 2003-03-27 | Biomedlab Corporation | Procede et dispositif permettant de balayer des analytes au moyen de resonance plasmonique de surface |
WO2008156491A2 (fr) * | 2006-09-29 | 2008-12-24 | Zyomyx, Inc. | Dispositifs et procédés pour l'analyse d'échantillons avec épuisement de la teneur en analyte |
FR2929011A1 (fr) | 2008-03-20 | 2009-09-25 | Commissariat Energie Atomique | Procede et dispositif de mesure quantitative a haute cadence de cibles biomoleculaires presentes sur ou dans un support d'analyse biologique. |
US20110171636A1 (en) * | 2008-09-19 | 2011-07-14 | Delaware State University | Mono- and multi-element coded libs assays and methods |
US20110000791A1 (en) * | 2009-07-02 | 2011-01-06 | Amic Ab | Capillary driven assay device and its manufacture |
US20120099103A1 (en) * | 2009-07-10 | 2012-04-26 | University Of Florida Research Foundation, Inc. | Method and apparatus to laser ablation-laser induced breakdown spectroscopy |
FR2964458A1 (fr) | 2010-09-06 | 2012-03-09 | Commissariat Energie Atomique | Dispositif de cartographie et d'analyse a haute resolution d'elements dans des solides |
Cited By (1)
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JP2016095139A (ja) * | 2014-11-12 | 2016-05-26 | 株式会社島津製作所 | 試験体プレート作製方法とそれにより作製された試験体プレート及びそれが用いられる含有物質計測装置 |
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CA2884867A1 (fr) | 2014-03-20 |
US9400252B2 (en) | 2016-07-26 |
CA2884867C (fr) | 2021-06-01 |
EP2895845A1 (fr) | 2015-07-22 |
JP6220878B2 (ja) | 2017-10-25 |
FR2995403B1 (fr) | 2014-09-12 |
CN104737001B (zh) | 2017-11-10 |
CN104737001A (zh) | 2015-06-24 |
KR20150052310A (ko) | 2015-05-13 |
FR2995403A1 (fr) | 2014-03-14 |
KR102165631B1 (ko) | 2020-10-14 |
US20150233837A1 (en) | 2015-08-20 |
JP2015534639A (ja) | 2015-12-03 |
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