EP2621470A1 - Procédé de préparation d'une structure chimique présentant une partition de phases, apte à générer un spectre de fluorescence spécifique et ses applications - Google Patents
Procédé de préparation d'une structure chimique présentant une partition de phases, apte à générer un spectre de fluorescence spécifique et ses applicationsInfo
- Publication number
- EP2621470A1 EP2621470A1 EP11773216.4A EP11773216A EP2621470A1 EP 2621470 A1 EP2621470 A1 EP 2621470A1 EP 11773216 A EP11773216 A EP 11773216A EP 2621470 A1 EP2621470 A1 EP 2621470A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydrophobic
- fluorescence
- microparticles
- mixture
- hydrophilic
- 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.)
- Withdrawn
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Classifications
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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
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6486—Measuring fluorescence of biological material, e.g. DNA, RNA, cells
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent materials, e.g. electroluminescent or chemiluminescent
- C09K11/06—Luminescent materials, e.g. electroluminescent or chemiluminescent containing organic luminescent materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1029—Heterocyclic compounds characterised by ligands containing one nitrogen atom as the heteroatom
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/10—Non-macromolecular compounds
- C09K2211/1018—Heterocyclic compounds
- C09K2211/1025—Heterocyclic compounds characterised by ligands
- C09K2211/1088—Heterocyclic compounds characterised by ligands containing oxygen as the only heteroatom
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2211/00—Chemical nature of organic luminescent or tenebrescent compounds
- C09K2211/18—Metal complexes
- C09K2211/181—Metal complexes of the alkali metals and alkaline earth metals
Definitions
- the subject of the invention is a process for preparing a fluorescent assembled chemical structure in phase partition, which is specific in that each phase of the partition solubilizes and physically separates fluorescent molecules in separate compartments such as for a particle or a liposome.
- the invention also relates to said assembled structures and their mixture as well as compositions or kits comprising them.
- the invention also relates to the use of these assembled structures and their mixing, in particular for in vivo medical imaging or for in vitro diagnosis of pathology, but also for the marking of a sample, an object or a liquid composition or for their authentication.
- the invention also includes objects or liquids marked by the assembled structures, their mixture or by the compositions according to the invention.
- Fluorescence is the property of some bodies to emit light after absorbing photons of higher energy.
- a fluorescent molecule fluorophore or fluorochrome
- fluorophore or fluorochrome has the property of absorbing light energy (excitation light) and quickly restoring it in the form of fluorescent light (emission light).
- the light re-emitted by the excited molecule may be of the same wavelength (resonance fluorescence) or longer wavelength (in liquid media) or smaller. This shift of the emission spectrum to higher wavelengths greatly facilitates the separation and detection of fluorescence light.
- fluorescein organic, natural or synthetic fluorochromes
- each fluorochrome can be characterized by its excitation and emission spectra.
- Biological tagging for medical diagnosis or imaging has largely developed the use of these fluorescent molecules.
- Fluorescence microscopy is based on the formation of an image by detection of this emitted light (Huang B et al, 2009). Many marking techniques are used: the simple labeling is done by affinity between a fluorochrome and the molecule to be labeled,
- immunolabeling which involves a fluorochrome-labeled antibody
- GFP green fluorescent protein
- FRET Fluorescent Resonance Energy Transfer
- Fluorescent molecules are also used in other applications, such as object marking, ink marking, etc. . They are powerful identification tools thanks to their specific physical properties.
- the inventors have demonstrated that it is possible to combine in structures assembled in phase partition different fluorescent molecules whose physicochemical properties do not allow their miscibility in the same solvent. Said structures have distinct compartments in which the combined fluorescent molecules are distributed according to their miscibility, which has the effect of generating a specific and unexpected resultant fluorescence, notably in that this resultant fluorescence is not the simple resultant of the mixing of the fluorescent molecules. . These assembled structures or a mixture of such structures are able to generate a specific and unexpected fluorescence spectrum. This effect is now revealed, the method which is the subject of the present invention makes it possible to obtain chemical structures assembled in phase partition capable of generating fluorescences. specific ones such as composite particles or liposomes allowing two levels of reading:
- the subject of the present invention is a process for preparing, in phase partition, an assembled chemical structure capable of generating a specific fluorescence signal, said phase partition between a first phase and a second immiscible phase. between them structuring a first compartment and a second compartment, said compartments not being miscible with each other, said method comprising the following steps:
- said first compartment contains a composition comprising at least one miscible compound capable of generating a fluorescence and said second compartment contains a composition comprising at least one miscible compound capable of generating a fluorescence.
- the invention also comprises a process for preparing, in phase partition, an assembled chemical structure having a compartmentalization capable of generating a specific phase-phase fluorescence signal, said phase partition delimiting a first compartment and a second compartment, said first compartment and said second compartment being immiscible with each other, said method comprising the following steps:
- said first compartment contains a composition comprising at least one miscible compound in this first phase capable of generating a fluorescence and the second compartment contains a composition comprising at least one miscible compound in this second phase capable of generating a fluorescence, and in which method, said first and second phases have been mixed with a third phase containing fluorescent compounds for some miscible in the first phase, or for others miscible in the second phase.
- step a the preparation of said first phase and said second phase will be carried out by methods well known to those skilled in the art depending on the chosen chemical structures and the structure chemical assembly in phase partition that one wishes to obtain from these two chemical structures.
- this assembled chemical structure is chosen from any structure assembled in partition or phase separation between at least two immiscible phases between them.
- chemical structure assembled but not limited to, emulsion (in particular water / oil or oil / water), structures assembled using amphiphilic macromolecules, laminated films, gels, liposomes or even micro- or nanoparticles.
- emulsions of squalene pluronic L35-phosphatidylcholine-surfactant or lecithin-phospholipid-surfactant type (Watrobska-Swietlikowska D and Sznitowska M, 2006). These are proposed mixtures for the delivery of drugs of a hydrophobic nature.
- a set of methods for obtaining emulsions are proposed in the review of He C.X., He Z.G. and Gao J.Q. Expert Opin Drug Deliv, Apr 7 (4): 445-60 (2010) Microemulsions and drug delivery Systems to improve the solubility and bioavailability of poorly water-soluble drugs.
- amphiphilic macromolecules of the Sodium dodecyl sulfate type, poly (gamma-glutamic acid) type (Akao T et al., 2010), poly (propylenimine) dendrimer (Chooi KW et al, 2010).
- hydrogel type gels such as copolymers of alkyl (meth) acrylates (Black JK et al, 2010) or else copolymers of polyethylene oxide and ethylene oxide (PEO-b). -PPO) (Sakai T et al, 2010).
- laminated films that is to say superimposed layers, made of monolayers made from inorganic materials (Hench and Polak, 2002) such as calcium phosphate or organic materials such as natural or synthetic polymers ().
- inorganic materials Hench and Polak, 2002
- organic materials such as natural or synthetic polymers ().
- biopolymer-based hydrogels such as alginate and chitosan are widely advocated.
- Liduir-Blodgett films that consist of building a monolayer film by depositing surfactant or amphiphilic molecules at an air / water interface. This monolayer is then transferred to a solid support by dipping it in the sub-phase. The adsorption is based on hydrophilic / hydrophobic type interactions.
- the author cites multilayer films with linear growth, harder and denser that do not allow the diffusion of molecules thus acting as a barrier. They can act as a reservoir for the production of compartmental films.
- Such architectures have been made by depositing for example poly (allylamine) / poly (styrene sulfonate) films on other poly (L-lysine) / hyaluronic acid type films.
- the method or method for obtaining it will be selected from standard methods or methods for obtaining those structures that are well known to those skilled in the art.
- the subject of the invention is a method for preparing an assembled chemical structure according to the present invention, characterized in that said phase partition delimits a first phase of hydrophobic nature (hydrophobic phase) and a second phase of hydrophilic nature
- said hydrophobic phase contains a composition comprising at least one hydrophobic compound capable of generating a fluorescence (called hydrophobic fluorescent compound) and said hydrophilic phase contains a composition comprising at least one hydrophilic compound capable of generating a fluorescence (called hydrophilic fluorescent compound)
- the subject of the invention is a process for preparing an assembled chemical structure according to the present invention, characterized in that said process is a process for preparing microparticles or nanoparticles capable of generating a signal fluorescence-specific, said microparticles or nanoparticles comprising a rigid or fluid wall delimiting at least one intraparticle space, said wall being hydrophobic in nature and said intraparticle space being occupied by an aqueous solution, or, conversely, said wall being of a nature hydrophilic and said intraparticle space being occupied by a solution of hydrophobic nature, said method implementing a process for preparing microparticles or nanoparticles comprising the following steps: a) the preparation of an organic solution immiscible with water ( named hydrophobic solution) and a solution aque use
- phase partition by mixing and emulsifying the hydrophobic solution with the aqueous solution
- hydrophobic solution contains a composition comprising at least one hydrophobic compound capable of generating a fluorescence (called hydrophobic fluorescent compound) and the hydrophilic solution contains a composition comprising at least one hydrophilic compound capable of generating a fluorescence (called hydrophilic fluorescent compound); or
- Said hydrophobic solution and hydrophilic solution are mixed with a third amphiphile containing a composition comprising at least one hydrophobic fluorescent compound and at least one hydrophilic fluorescent compound such that the mixture of the three solutions generates a phase partition between a hydrophilic phase; containing at least one hydrophilic fluorescent compound and a hydrophobic phase containing at least one hydrophobic fluorescent compound.
- microparticles or nanoparticles is meant in particular any particle, whether of composite or synthetic type or of liposome type, preferably cylindrical, ovoid or spherical in shape, of diameter between 10 nm and 1 ⁇ for nanoparticles and 1 to 500 ⁇ for the microparticles, preferably of diameter between 30 nm for the nanoparticles and 50 ⁇ for the microparticles.
- microparticles or nanoparticles generally comprising a rigid or fluid wall delimiting at least one intra-particle space.
- microparticles or nanoparticles mention may be made in particular but without being limited to the following microparticles or nanoparticles:
- polycaprolactone polymethylmethacrylate
- Pluronic® such as Pluronic®P6100 or L92
- nanoparticles with a metallic core
- nanoparticles made from a mixture of the various polymers mentioned above
- the wall (or shell) is hydrophobic in nature and said intraparticle space may be occupied by an aqueous solution
- said nano- or microparticle may be composed of at least one polymer which may be chosen from the group comprising polycaprolactone, polymethyl methacrylate, Eudragit or Pluronic® such as Pluronic®P6100 or L92, preferably polymethyl methacrylate, a mixture of polymethyl methacrylate and polycaprolactone, a mixture of polymethyl methacrylate and Pluronic® and even more preferably polymethyl methacrylate.
- polymers which may be chosen from the group comprising polycaprolactone, polymethyl methacrylate, Eudragit or Pluronic® such as Pluronic®P6100 or L92, preferably polymethyl methacrylate, a mixture of polymethyl methacrylate and polycaprolactone, a mixture of polymethyl methacrylate and Pluronic® and even more preferably polymethyl methacrylate.
- latex chitosan, cellulose and viscose.
- the wall or shell
- said intraparticle space may be occupied by a lipid solution
- Such supports are well known to those skilled in the art and can be obtained using solvent evaporation encapsulation processes (emulsion / precipitation), by coacervation, by interfacial polymerization, by nebulization, by spray drying, by coating in a fluidized bed, by gelling by freezing drops, preferably by evaporation of solvent.
- solvent evaporation encapsulation processes emulsion / precipitation
- coacervation by coacervation
- interfacial polymerization by nebulization
- spray drying by coating in a fluidized bed
- gelling by freezing drops
- the subject of the invention is a method for preparing microparticles or nanoparticles according to the invention, characterized in that the microparticles or nanoparticles are composite / synthetic particles and in that the process process for the preparation of these microparticles or nanoparticles is chosen from:
- the subject of the invention is a process for the preparation of microparticles or nanoparticles, characterized in that the process used for the preparation of microparticles or nanoparticles is the double emulsion-solvent evaporation process, and
- hydrophobic solution consists of a solution chosen from:
- the subject of the invention is a process for the preparation of microparticles or nanoparticles according to the invention, characterized in that the said hydrophobic solution consists of a solution chosen from: a solution of polymethyl methacrylate (PMMA) dissolved in dichloromethane;
- PMMA polymethyl methacrylate
- an aqueous solution containing, pure or as a mixture, at least one hydrophilic fluorescent substance
- the subject of the invention is a method for preparing microparticles or nanoparticles according to the invention, characterized in that said microparticles or nanoparticles are liposomes and the process used for the preparation of microparticles or nanoparticles is a process for the preparation of liposomes, in particular using as a hydrophobic solution a phospholipid concentrate.
- Non-limiting examples include, but are not limited to, standard liposome preparation methods such as:
- vesicles are multi-lamellar, or unilamellar with very different sizes (50 to 1090 nanometers)
- the subject of the invention is a process for preparing an assembled chemical structure or, preferably, microparticles or nanoparticles, according to the invention, characterized in that:
- composition comprising at least one miscible compound in the first structure capable of generating a fluorescence or said composition comprising at least one miscible compound in the second structure capable of generating a fluorescence;
- composition comprising at least one hydrophobic compound capable of generating a fluorescence or said composition comprising at least one compound hydrophilic capable of generating fluorescence,
- a synthetic or natural extract is chosen from the group consisting of a synthetic or natural extract, plant or animal, or a mixture of synthetic and / or natural extracts, a hydrophobic or hydrophilic isolated or purified compound capable of generating a fluorescence, or a mixture of these compounds isolated or purified.
- natural, plant or animal extract capable of generating a fluorescence
- synthetic extract is understood to mean any structure or substance present in an organism belonging to the animal or vegetable kingdom but the synthesis of which has been carried out by chemical synthesis.
- Examples of natural extract of plant origin include extracts of plants, seeds, pollen grains or plant spores.
- the subject of the invention is a process for preparing an assembled chemical structure or, preferably, microparticles or nanoparticles, according to the invention, characterized in that in that said composition comprising at least least one hydrophobic fluorescent compound consists essentially of the hydrophobic portion of a plant or animal extract, or a mixture thereof, and in that said composition comprising at least one hydrophilic fluorescent compound consists essentially of that the hydrophilic part of a plant or animal extract, or a mixture thereof.
- fluorescent compound is meant herein in particular compounds capable of generating fluorescence after being submitted to radiation, in particular ultraviolet type.
- the subject of the invention is a process for the preparation of an assembled chemical structure or, preferably, of microparticles or nanoparticles, according to the invention, characterized in that in that said hydrophobic part and said hydrophilic portion are derived from the same extract or two separate extracts.
- the present invention relates to a method of preparing a mixture of at least two assembled chemical structures and preferably a mixture of at least two microparticles or nanoparticles capable of generating an original signal in significantly different fluorescence (capable of being distinguished from each other ), each of said assembled chemical structures or said microparticles or nanoparticles being obtained by a process for preparing assembled chemical structure or microparticles or nanoparticles according to the present invention, characterized in that:
- At least one of the compounds capable of generating a fluorescence and miscible in the first phase, and at least one of the compounds capable of generating a fluorescence and miscible in the second phase is different between these two assembled structures; or at least one of the hydrophobic or hydrophilic fluorescent compounds contained in said particle is different between these two particles.
- the subject of the invention is a process for preparing a mixture of at least n assembled chemical structures or for the preparation of a mixture of at least n microparticles or nanoparticles ( n denoting the number of types of assembled structures or nano- and microparticles) capable of generating an original fluorescence signal significantly different between these n assembled structures or particles, each of said assembled structures or microparticles or nanoparticles being obtained by a method according to the present invention , characterized in that it implements for each of these assembled structures or particles a composition of a compound capable of generating a different fluorescence for each of these assembled structures or particles, and in that n is greater than or equal to 2, of preferably at 3, 4, 5, 6, 7, 8, 9 or 10.
- the present invention relates to assembled chemical structures or microparticles or nanoparticles, or a mixture of assembled structures or microparticles or nanoparticles, capable of generating an original signal in fluorescence or an original fluorescence spectrum, obtained (es) or obtainable by a process according to the present invention.
- the present invention relates to a mixture at least n microparticles or nanoparticles, capable of generating an original fluorescence signal different between each of said particles, characterized in that each of said particles comprises:
- a rigid or fluid wall delimiting at least one intraparticle space, said wall being hydrophobic in nature and said intraparticle space being occupied by an aqueous solution, or, conversely, said wall being hydrophilic in nature and said intraparticle space being occupied by a solution of hydrophobic nature;
- said wall comprises at least one hydrophobic fluorescent compound and said intraparticle space comprises at least one hydrophilic fluorescent compound
- said wall comprises at least one hydrophilic fluorescent compound and said intraparticle space comprises at least one hydrophobic fluorescent compound; and in that :
- At least one of the hydrophobic or hydrophilic fluorescent compounds contained in said rigid or fluid wall and / or in said intraparticle space is different between these n particles
- n being greater than or equal to 2, preferably 3, 4, 5, 6, 7, 8, 9 or 10.
- said particles are chosen from composite / synthetic particles or from liposomes, in particular as described for the above methods according to the present invention.
- the subject of the invention is a mixture of at least n microparticles or nanoparticles, said particles being capable of generating a specific fluorescence signal according to the present invention, characterized in that said particles of this mixture are particles whose rigid or fluid wall is hydrophobic in nature and the intra-particle space is hydrophilic in nature.
- the subject of the invention is a mixture of at least n microparticles or nanoparticles, capable of generating an original fluorescence signal according to the present invention, in which said particles are mixed with synthetic particles whose wall consists essentially of polymers selected from polymethyl methacrylate (PMMA), polystyrene, latex, chitosan, cellulose and viscose.
- PMMA polymethyl methacrylate
- polystyrene polystyrene
- latex latex
- chitosan cellulose
- viscose viscose
- the subject of the invention is a mixture of at least n microparticles or nanoparticles, capable of generating an original fluorescence signal according to the present invention, characterized in that
- composition comprising at least one miscible compound in the first phase capable of generating a fluorescence or said composition comprising at least one miscible compound in the second phase capable of generating a fluorescence;
- composition comprising at least one hydrophobic compound capable of generating a fluorescence or said composition comprising at least one hydrophilic compound capable of generating a fluorescence,
- a synthetic or natural extract is chosen from the group consisting of a synthetic or natural extract, plant or animal, or a mixture of natural synthetic extracts, a hydrophobic or hydrophilic isolated or purified compound capable of generating a fluorescence, or a mixture of these isolated or purified compounds .
- the subject of the invention is a mixture of at least n microparticles or nanoparticles, capable of generating an original fluorescence signal according to the present invention, in which mixture, characterized in that said composition comprising at least least one hydrophobic compound capable of generating a fluorescence consists essentially of the hydrophobic portion of a plant or animal extract, natural or synthetic, or a mixture thereof, and in that said composition comprises at least one hydrophilic compound capable of generating a Fluorescence consists essentially of the hydrophilic portion of said plant or animal extract, or a mixture thereof.
- the subject of the invention is a mixture of at least n assembled structures or n microparticles or nanoparticles according to the present invention, characterized in that the said hydrophobic part and the said hydrophilic part within the same particle are taken from the same extract or two separate extracts.
- the present invention provides a composition for in vivo diagnosis or for in vivo medical imaging, characterized in that it comprises a mixture of at least n assembled structures or n microparticles or nanoparticles according to the present invention.
- the composition according to the invention is characterized in that, in the case of particles in particular, the outer wall of said particle is labeled with a marker specific to the biological tissue or of the cell, or one of their element that one seeks to observe or to highlight, each of the n particles being marked with a different marker between each of the particles.
- the specific markers of the biological tissue or of the cell mention may be made of, but not limited to, any compound capable of specifically recognizing a particular structure or a compound of said targeted tissue or cell, such as an antigen or a receptor expressed the outer surface of these cells, the specific marker may then be but not limited to an antibody directed against this antigen or a specific ligand of said receptor.
- the present invention provides a kit or kit for in vivo diagnosis or for in vivo medical imaging, characterized in that said kit comprises a mixture of at least n assembled structures or n microparticles or nanoparticles according to the present invention, each of the assembled structures or particles being preferably marked by a different marker.
- said marker is a biological marker capable of binding specifically to the element that it is desired to detect or observe, in particular an antibody directed specifically against this element.
- the present invention relates to a method for marking a sample or an object characterized in that said sample or object is brought into contact with a mixture of n assembled structures or n microparticles or nanoparticles. according to the present invention.
- the object is included in the object group consisting of a work of art, of high value technical parts, of manufactured objects.
- perfume bottles such as wine bottles, packaging, banknotes, clothing, watches, electrical products, books, passports, medicines, chemical formulations, food products such as meat, perfumes, wines, articles made from canvas, paper, plastic, inks, paint.
- the object, composition or sample marking according to the invention can be done in any appropriate manner that does not cause modification of the characteristics of said objects, compositions or samples such as morphological or biological characteristics (if it is acts of biological materials).
- the marking can be done by gluing or varnishing if the support of the composition used is respectively an adhesive or a varnish
- the adhesives or varnishes will be chosen from glues or varnishes with little or no fluorescence at all, or in that the said glues or varnishes do not interfere with the interpretation of the essential signal, for example cellulose, polymethyl methacrylate. (PMMA), the latex,
- the marking can be achieved by a mixing operation.
- the marking can be achieved by including the mixture of said particles during the manufacture of the solid, such as a paste, a fabric, a fabric (for a painting), glass or for any material useful for the manufacture of an object.
- said solids will preferably be chosen from neutral solids in terms of fluorescence emission, that is to say from among materials with little or no fluorescence, or in that said materials do not interfere with fluorescence. interpretation of the essential fluorescence signal resulting from the phase partition.
- the marking can be carried out by:
- compositions according to the invention with an ink or ink vehicle composition or with water or a combination of water and organic solvent and printing directly on a product, or
- composition according to the invention directly to solutions or formulations of chemicals such as drugs or food products.
- the marking according to the invention can be carried out by spraying.
- Spraying can be done for example using a nozzle apparatus for marking many products or using an apparatus of the "aerosol" type.
- the present invention relates to a method for marking a liquid composition, characterized in that a mixture of assembled structures or n microparticles or nanoparticles according to the present invention is incorporated in said composition, in particular said composition being selected from an ink, an injectable liquid or a nutrient solution.
- the present invention relates to a method of diagnosis, in particular pathology or a stage of advancement or regression of a pathology, from a sample biological sample, characterized in that it implements a step in which a mixture of n assembled structures or n microparticles or nanoparticles according to the present invention is brought into contact with said sample and observed or analyzed by the fluorescence spectrum emitted by the sample thus marked, in particular at certain sample elements, preferably from a biopsy.
- the present invention relates to a method for authenticating a sample or an object that may have been marked by a particular mixture or combination of n assembled structures or n microparticles or nanoparticles according to the present invention.
- invention characterized in that it comprises the following steps:
- the present invention comprises an object or liquid characterized in that it is marked by a specific mixture or combination of n assembled structures or n microparticles or nanoparticles according to the invention.
- the present invention relates to the use of a mixture or specific combination of n assembled structures or n microparticles or nanoparticles according to the present invention as a biomarker, in particular for proteomic analysis, genomic analysis, diagnosis in synthetic chemistry, environmental diagnosis, traceability or object authentication, or for the fight against counterfeiting.
- the present invention relates to a method for analyzing or detecting the presence of at least one assembled structure or microparticle or nanoparticle, or a mixture of n assembled structures or n microparticles or nanoparticles, capable of generating a original fluorescence signal obtained according to the invention or capable of being obtained by a method according to the present invention, characterized in that it implements a reading of the fluorescence spectrum resulting from the separation of the hydrophobic and hydrophilic phase of the particle by laser confocal microscopy to allow the identification of each spectral component of these two phases, these fluorescence spectra of each of the components being specific to the particle analyzed.
- Fluorescent particle applications can also be numerous in public health, and industrial sectors such as agribusiness, environmental management, or chemistry.
- This technology makes it possible to advantageously generate combinatorials specific and unique of these assembled chemical structures such as unique combinations of particles.
- These particle mixtures generate a tamper-proof color code that can be analyzed by fluorescence readout.
- the labeling is invisible to the eye and specific (unique molecular combinatorial), natural and easily detectable by a fluorescence reader that can be portable.
- the present invention also has the advantage of being able to encapsulate fluorescent substances multiplexed in an innovative way by compartmentalization thanks to the hydrophilic or hydrophobicity properties of the latter.
- This new method of encapsulating fluorescent substances makes it possible to propose the use of numerous natural plant substances, which constitutes an advantage of this invention.
- Figure 1A Bl extract solution, fluorescein (F) and extract mixture B1 / fluorescein (M), lv / lv and put under the illumination of an ultraviolet lamp.
- FIG. 1B After synthesis of the particles, the solutions are centrifuged in order to separate the beads from the supernatant containing the excess substances. The supernatants are recovered and observed under an ultraviolet lamp.
- Figure 1C The particles after synthesis are pelleted by centrifugation and then resuspended in a solution of PVA at 0, 1%. This type of rinsing is repeated twice before final centrifugation and observation of the particle pellet and the rest of suspended particles under an ultraviolet lamp.
- Figures 2A-2B Observation of composite particles on slides on a fluorescence microscope
- Figure 2A PMMA composite particles enriched with extract B 1 containing hydrophobic fluorescent plant substances observed at 40 X magnification under a fluorescence microscope. The fluorescence emission is analyzed under a B2A filter (excitation> 410 nm, stop filter: 515 at 560 nm).
- Figure 2B PMMA composites enriched with fluorescein after synthesis of the particles, the solutions are centrifuged to separate the beads of the supernatant containing the excess substances. The supernatants are recovered and observed under an ultraviolet lamp.
- FIG. 3A Colloidal solutions of different liposome preparations: unlabeled liposomes (V), liposomes containing extract B1 (B1), liposomes containing a fluorescein solution (F) and liposomes containing both B1 extract and a fluorescein solution (M).
- Figure 3B Colloidal solutions of different liposome preparations specified in A after dialysis.
- S is a dialysate fraction of M.
- Figures 4A-4B Confocal images of PF capsules (green channel only: 500-620 nm, scale bar: ⁇ ). (A) three typical capsules, (B) zoom on a capsule approximately ⁇ in diameter.
- Figure 5 Confocal image of PA capsules (green channel: 500-620 nm, green channel: 630-800 nm, scale bar: ⁇ )
- Figures 6A-6B Confocal images of the APF capsules (scale bar: 10 ⁇ ).
- FIGS. 8A-8E Emission spectra obtained using a spectrofluorometer, after excitation at 488 nm
- Figure 8C Spectrum of particles enriched in hydrophobic substances
- Figure 8D Spectrum of hydrophobic substances in dichloromethane
- Figure 8E Spectrum of particles enriched in fluorescein and substances hydrophobic.
- Figure 9A Water-in-oil solutions: (1) solution of hydrophobic substances; (2) after adding 100 ⁇ . fluorescein (10 mg / mL) in 900 ⁇ . hydrophobic substances (12.5 mg / mL); (3) emulsion generated after stirring (vortex) of the mixture presented in (2)
- Figure 9B "Oil-in-water” solutions: (4) 100 ⁇ mixture. hydrophobic substances in 900 ⁇ . fluorescein; (5) emulsion generated after stirring (vortex) of the solution in (4)
- FIG. 9C Spectrum corresponding to the spectrum of the "water-in-oil" emulsion visualized in FIG. 9 A (C)
- FIGS. 9D Spectrum corresponding to the spectrum of the "oil-in-water” emulsion visualized in FIG. 9B (D)
- Figure 10 Photograph of kinetics obtained for a "water-in-oil" emulsion after stirring every two minutes. A photograph is taken every 3 minutes (0 mn (1), 3 mn (2), 6 mn (3), 9 mn (4), 12 mn (5).
- PMMA polymethyl methacrylate
- the PMMA previously solubilized in a solvent such as dichloromethane is mixed with a plant extract composed of 98% of chlorophylls a and b (hydrophobic molecules) obtained by chloroform treatment of a 70 ° ethanol extract allowing
- This mixture is the phase we call solvent / PMMA / extract.
- a solute (aqueous phase) containing hydrophilic fluorescent molecules such as fluorescein mixed with the first (Solvent / PMMA) allows by sonication to create an emulsion of aqueous fine particles.
- This emulsion mixed with water and then emulsified a second time by sonication then leads to fine particles in suspension in water (from 50 nm to 10 ⁇ ).
- the latter consist of a PMMA shell / Bl extract containing small (s) globule (s) solute (s). The solvent is evaporated by stirring thus creating solid particles.
- the PMMA powder (250 mg) is dissolved in 5 ml of pure dichloromethane. If the particles are enriched in extract B1, then 1ml of extract B1 at 25 mg / ml (chloroform) is poured into the PMMA solution. To the latter solution is added 1 ml of water or a solution of fluorescein (3 mM / ml). Everything went to the sonicator to obtain a very fine emulsion. The emulsion is then poured into a large volume of 0.1% PVA solution (500 ml). The whole is stirred for 16 h under a fume hood in order to completely evaporate the solvent.
- the particles are recovered by centrifugation at 6000 rpm ("rpm" for rpm) for 20 minutes. The supernatant is removed and the pellet taken up in 0.1% PVA solution. Two centrifugations are repeated to remove any trace of Bl extract or fluorescein in the particle recovery buffer.
- the particles are placed between blade and coverslip. Each assembly is sealed with paraffin.
- the slides are then observed on a fluorescence microscope.
- Example 1 The observations reported in Example 1 show that PMMA particles containing a water solution generate only a very weak ultraviolet fluorescence (V in part C of Example 1).
- V in part C of Example 1 When the water is enriched with a fluorescent hydrophilic substance, fluorescein, then the PMMA particles produce a fluorescent emission under ultraviolet light whose yellow-green color is characteristic of the latter (see FIGS. 1A-1C, tube "F").
- the organic phase containing the PMMA is enriched by the extract B1 (rich in hydrophobic substance (s) such as chlorophyll), the particles thus produced emit under ultraviolet a fluorescence of red color characteristic of the extract B1.
- the compartmentalization effect is demonstrated by epifluorescence observations of the particles.
- the hydrophobic substances of the B1 extract are preferentially distributed around the periphery of the particles (in the shell) (see FIG. 2A) while the hydrophilic substance fluorescein is only observed in the cavities of the particles (see FIG. 2B).
- the method for obtaining liposomes is the injection into ethanol similar to that described by Thierry et al. (Gold, AR, Lunardi-Iskandar, Y, Bryant, JL, Rabinovitch, P., Gallo, RC, and Mahan, LC: Systemic gene therapy: biodistribution and long-term expression of a transgene in mice, Proc Natl Acad Sci USA 92, 9742-9746, 1995).
- the various labeled and control liposome preparations are subjected after 1 hour incubation at 25 ° C. to a first dialysis of 2 hours in bags of porosity 160,000 d (Spectra) in distilled water at 25 ° C. Then the dialysis bags are subjected to a second dialysis of 12 hours at 25 ° C. The preparations are recovered in Eppendorf tubes and then placed under UV to evaluate their color emitted (See Figures 3 A-3B)
- polymeric three-dimensional networks such as polymeric triblocks (solid or gel-like materials) containing by their composition a hydrophilic portion and a hydrophobic portion.
- polymeric triblocks solid or gel-like materials
- the spectral confocal microscopy experiments presented in this section were performed using a LEICA TCS-SP2 laser scanning microscope system (right frame).
- the excitation was carried out using an Argon laser at the wavelength of 488 nm with a power of the order of that usually used when observing immunohistochemical markings conventionally encountered in biology (for information only : laser at a quarter of its maximum power and acousto-optic filter allowing less than 20% of the laser line).
- the lens used was a high-aperture oil immersion objective specifically designed for confocal fluorescence microscopy (HCX PL APO CS 40.0 x 1.25 OIL). It allows a work between blade and lamella of 170 ⁇ .
- the separation between excitation and emission (fluorescence) is carried out using a dichroic interference mirror of the RSP500 type (having a cut-off wavelength at 500 nm). With this mirror, the incident laser at 488 nm is reflected back to the sample, but the return light (wavelength greater than 488 nm) passes mainly through the mirror.
- This LEICA system collects a specific fluorescence band. So this system allows spectral resolution and wavelength scanning of the collected fluorescence. In the images that will be presented, the green channel will correspond to a fluorescence collection between 500 nm and 620 nm and the red channel to a fluorescence collection between 630 nm and 800 nm.
- the spectra presented will correspond to a wavelength scanning acquisition of 500 nm to 800 nm with a collection window of 10 nm.
- Each image presented is obtained by scanning the excitation beam at a rate of 400 lines per second and corresponds to an average over several scans of the same area.
- These images are also confocal sections (virtual sections) and are thus obtained by collecting the fluorescence mainly from an axial plane of reduced thickness (of the order of one micron).
- the theoretical resolution given by the manufacturer is of the order of 0.160 ⁇ in lateral and 0,9 ⁇ in axial.
- the samples were prepared from capsules in aqueous solution (with 0.1% surfactant additive to avoid aggregation). After centrifugation of these solutions, approximately 1 ⁇ l of solution was taken from the bottom of the tubes and mixed with a drop of mounting medium for fluorescence microscopy (Vectashield), then placed between slide and slide microscopy.
- Figures 4A and 4B show the capsules typically observed on PF samples. Only the green channel is presented because no significant fluorescence could be observed beyond 630 nm. In the results of the spectral study illustrated in FIG. 7, a fluorescence typical of fluorescence with a maximum around 530 nm is found. The remarkable element on these samples is the inhomogeneous distribution of the fluorescent substance in the corresponding polymer particles to the cavities of the latter. Zooming on a large particle of about 10 ⁇ in diameter and shown in Figure 1B illustrates this inhomogeneity. On this particle, the fluorescence appears in areas of the order or less than one micron (see arrows in Figure 1B).
- Figures 5A and 5B show three particles typically observed on PA type samples. There is the presence of solid or hollow particles, with more or less extensive cavities. The image is an overlay of the red and green tracks. This time, the distribution of the fluorescence is homogeneous within the polymer corresponding to the shell of the latter. Low fluorescence is found in the green channel and a larger one in the red channel. By playing on the sensitivities of the detectors of these two channels, we manage to balance the brightness of the images and we thus obtain capsules that appear in yellow.
- APF type sample (vegetable substance and fluorescein mixture):
- FIGS. 6A and 6B show the particles obtained following a mixture of the two substances mentioned above (fluorescein and plant substance). For the sake of clarity, the two red and green lanes were not superimposed here.
- hydrophilic fluorescein
- hydrophobic plant substance
- the hydrophobic substance is inserted into the shell of the particle indicated by an arrow on the red path of Figure 6.
- the hydrophilic substance occupies itself inside the particle (green channel).
- the two spectral curves shown in Figure 7 corroborate this statement. Indeed, the spectra have been plotted by choosing as region of interest on the series of spectral images, either a ring of 15 pixels wide integrating the pixels of the shell, or a disk integrating the inner pixels.
- the particles were suspended in water (1 mg of particles in 500 ⁇ ).
- Fluorescein enriched particle spectrum (5mg / mL) (A); spectrum of a fluorescein solution (10 mg / mL) (B); spectrum of particles enriched in hydrophobic substances (chlorophylls especially at 12.5 mg / ml) (C); spectrum of hydrophobic substances in dichloromethane (12.5 mg / mL) (D); spectrum of particles enriched in fluorescein and hydrophobic substances (E).
- This example demonstrates the possibility of obtaining the fluorescence emission spectra of the composite structures suspended in water under an excitation light of 488 nm, with the similarity of the spectra obtained for the pure fluorescein (hydrophilic substance). or coated (514 nm max) (at the heart of composite structures).
- this example shows that compartmentalised composite structures containing both hydrophilic (such as fluorescein) and hydrophobic substances (like chlorophyll in particular) generate an original spectrum with 4 characteristic fluorescences: at 520 nm, at 562 nm and at 680 nm and 715 nm.
- the spectrum essentially reveals a patent modification of the emission of fluorescein; this seems to lose all of its fluorescence intensity at 514 nm with a shift in the emission spectrum towards the higher wavelengths (520/562 nm). This result is in agreement with the measurements of the emission spectra obtained by confocal fluorescence microscopy.
- the other two correspond to the hydrophobic substances (at 660/680 and at 720/740 nm).
- the methods of the invention as described allow to create solid composite structures using polymer and / or lipids thus generating a physical barrier between immiscible substances in solution and unfit for mixtures as shown in the example.
- the present invention is obj and a composition (and a process for obtaining it) capable of generating original fluorescent composite structures.
- the claimed process makes it possible to create (obtain) this composite structure by producing an emulsion, a particle or a liposome using an aqueous solution of hydrophilic substances (such as fluorescein) and a solvent containing the hydrophobic substances. (such as chlorophyll) and the polymer (such as PMMA) or water immiscible lipids.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1057855A FR2965273B1 (fr) | 2010-09-29 | 2010-09-29 | Procede de preparation d'une structure chimique presentant une partition de phases, apte a generer un spectre de fluorescence specifique et ses applications |
| PCT/EP2011/067056 WO2012041995A1 (fr) | 2010-09-29 | 2011-09-29 | Procédé de préparation d'une structure chimique présentant une partition de phases, apte à générer un spectre de fluorescence spécifique et ses applications |
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| EP11773216.4A Withdrawn EP2621470A1 (fr) | 2010-09-29 | 2011-09-29 | Procédé de préparation d'une structure chimique présentant une partition de phases, apte à générer un spectre de fluorescence spécifique et ses applications |
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| US (1) | US20130273559A1 (fr) |
| EP (1) | EP2621470A1 (fr) |
| FR (1) | FR2965273B1 (fr) |
| WO (1) | WO2012041995A1 (fr) |
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| EP3315582A1 (fr) | 2013-03-15 | 2018-05-02 | Massachusetts Institute Of Technology | Terres rares/spectrale spatiale des codes à barres de microparticules pour le étiquetage d'objets et de tissus |
| WO2019138439A1 (fr) * | 2018-01-09 | 2019-07-18 | 日本電気株式会社 | Dispositif de confirmation, procédé de confirmation et programme |
| JP7222469B2 (ja) * | 2018-09-13 | 2023-02-15 | 吉彦 望月 | 塗装医療器具の製造方法および水系塗料 |
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| EP0557595B1 (fr) * | 1992-02-25 | 1997-07-23 | Levine, Robert Aaron | Essai pour composant objectif |
| DE10042023C2 (de) * | 2000-08-08 | 2003-04-10 | Biognostic Ag | Kapseln, die feste Teilchen signalerzeugender Substanzen einkapseln, und deren Verwendung bei Bioassays zum Nachweis von Zielmolekülen in einer Probe |
| CN1670122A (zh) * | 2005-03-24 | 2005-09-21 | 复旦大学 | 含有有机纳米发光材料的微乳液及其制备方法和应用 |
| US9943481B2 (en) * | 2005-05-26 | 2018-04-17 | Biorest Ltd. | Compositions and methods using same for delivering agents into a target organ protected by a blood barrier |
| WO2009009469A1 (fr) * | 2007-07-06 | 2009-01-15 | University Of Central Florida Research Foundation, Inc. | Nanoparticules de chitosan ultrapetites utiles comme agents d'imagerie biologique et procédés de fabrication de celles-ci |
| FR2934954B1 (fr) * | 2008-08-14 | 2011-07-22 | Commissariat Energie Atomique | Emulsion fluorescente de vert d'indocyanine |
| CN101486903B (zh) * | 2009-02-23 | 2012-04-11 | 东南大学 | 一种基于吡啶二羧酸的稀土发光纳米粒子的制备方法 |
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2010
- 2010-09-29 FR FR1057855A patent/FR2965273B1/fr not_active Expired - Fee Related
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2011
- 2011-09-29 US US13/824,679 patent/US20130273559A1/en not_active Abandoned
- 2011-09-29 EP EP11773216.4A patent/EP2621470A1/fr not_active Withdrawn
- 2011-09-29 WO PCT/EP2011/067056 patent/WO2012041995A1/fr not_active Ceased
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| WO2012041995A4 (fr) | 2012-06-21 |
| WO2012041995A1 (fr) | 2012-04-05 |
| US20130273559A1 (en) | 2013-10-17 |
| FR2965273A1 (fr) | 2012-03-30 |
| FR2965273B1 (fr) | 2015-07-17 |
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