WO2012105794A2 - 생체 적합 온도 내에서 큐리 온도를 가지는 자성 나노입자 및 그 제조 방법 - Google Patents
생체 적합 온도 내에서 큐리 온도를 가지는 자성 나노입자 및 그 제조 방법 Download PDFInfo
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Definitions
- the present invention relates to a magnetic nanoparticle having a Curie temperature in a biocompatible temperature, a method for preparing the same, a nanocomposite comprising the same, a composition for detecting a target substance, and a method for obtaining an image of a living body or a sample.
- Detection of biologics using magnetic nanoparticles has attracted much attention because of their ease of use and relatively little damage to the cells being detected. Recently, researches such as improving the magnetization value of magnetic nanoparticles have been conducted to improve the sensitivity of magnetic-based biomaterial detection.
- a detection device using biotin-avidin binding may be used for detection and signal amplification of a biologic, and the detection device has many non-specific reactions. It has a disadvantage of high noise.
- the agglomeration phenomenon may not only cause precipitation in blood vessels and cause thrombosis, but also reduce the surface area of externally exposed magnetic nanoparticles, thereby reducing magnetic nano-based May reduce the effectiveness of diagnostic / drug delivery / treatment.
- aggregation between magnetic nanoparticles can interfere with biochemical reactions such as antigen-antibody reactions, leading to increased signal noise. As a result, the diagnostic efficiency may be reduced.
- the present invention provides a magnetic nanoparticle comprising a rare earth metal, a divalent metal and a transition metal oxide and having a Curie temperature in a temperature range of -80 ° C to 41 ° C as a means for solving the above problems. .
- the present invention as another means for solving the above problems, (a) reducing the precursor of the rare earth metal, the precursor of the divalent metal and the precursor of the transition metal oxide, to form a magnetic nanoparticle; And (b) it provides a method for producing a magnetic nanoparticles, comprising the step of heat-treating the magnetic nanoparticles.
- the present invention is another means for solving the above problems, the magnetic nanoparticles according to the present invention; And it provides a nanocomposite comprising a biological material bonded to the surface of the magnetic nanoparticles.
- the present invention is another means for solving the above problems, the magnetic nanoparticles according to the present invention or the nanocomposite according to the present invention; And it provides a composition for detecting a target substance comprising a magnetic-antibody complex.
- the present invention comprises the steps of administering a composition for detecting a target substance according to the invention to a living body or a sample; And detecting a signal emitted by the magnetic nanoparticles or nanocomposites from the living body or the sample to obtain an image.
- the magnetic nanoparticles of the present invention have a Curie temperature in the temperature range of 0 ° C to 41 ° C, the ferromagnetic and paramagnetic properties can be controlled within the biocompatible temperature at which biologics are not destroyed, and detection, separation and The magnetic properties can be controlled by adjusting the temperature so that the ferromagnetic properties such as signal amplification are required only in the field of transmission. Accordingly, the magnetic nanoparticles of the present invention can minimize side effects due to ferromagnetic properties, and can be utilized for effective detection and separation of biological materials.
- FIG. 1 is a view showing a nanocomposite according to an embodiment of the present invention.
- FIG. 2 is a view showing a magnetic nanoparticles according to an embodiment of the present invention in which the detection means is coupled.
- FIG. 3 is a view showing a nanocomposite according to another embodiment of the present invention to which a detection means is coupled.
- Figure 4 is a schematic diagram showing the detection process of the target material using the target material detection composition according to an embodiment of the present invention.
- TEM 5 shows a high-resolution transmission electron microscope (TEM) image of magnetic nanoparticles according to an embodiment of the present invention.
- FIG. 6 is a graph showing an X-ray diffraction (XRD) pattern of the magnetic nanoparticles according to an embodiment of the present invention.
- M-T magnetization value-temperature
- the present invention relates to magnetic nanoparticles comprising rare earth metals, divalent metals and transition metal oxides and having a Curie temperature in the temperature range of -80 ° C to 41 ° C.
- the magnetic nanoparticles of the present invention may comprise rare earth metals, divalent metals and transition metal oxides, and have a temperature range of ⁇ 80 ° C. to 41 ° C., preferably a biocompatibility temperature of 0 ° C. to 41 ° C., more Preferably it may have a Curie temperature in the temperature range of 10 °C to 40 °C.
- the term "Curie temperature” used in the present invention is a critical temperature at which the ferromagnetic material loses magnetism as the temperature increases, and the ferromagnetic material has paramagnetic characteristics above the Curie temperature.
- the magnetic nanoparticles of the present invention have a Curie temperature within a biocompatible temperature range, the ferromagnetic and paramagnetic properties of the magnetic nanoparticles can be controlled within a temperature range in which biomaterials are not destroyed.
- the average diameter of the magnetic nanoparticles of the present invention is not particularly limited, and may be, for example, 1 nm to 500 nm, preferably 10 nm to 300 nm, and more preferably 20 nm to 100 nm.
- the shape of the magnetic nanoparticles of the present invention is not particularly limited, and may be, for example, spherical, linear, cylindrical, planar, or a combination thereof.
- rare earth metal in the present invention examples include Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb or Lu, and the like.
- a lanthanum-based metal such as La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, or Lu, and more preferably La or Nd And the like, but is not limited thereto.
- divalent metal in the present invention examples include Be, Mg, Ca, Sr, Ba, Ra, Pb, V, Nb, Ta, Zn, Cd or Hg, preferably Be, Mg, Ca Alkaline earth metals such as Sr, Ba or Ra; Or Pb, and the like, and more preferably Sr, Ba, Ca, or Pb, but is not limited thereto.
- transition metal oxides in the present invention include Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W , Re, Os, Ir, Pt, Au and Hg may be an oxide of one or more metals selected from the group, preferably manganese oxide (manganese oxide), but is not limited thereto.
- Magnetic nanoparticles of the present invention may include, but is not limited to, 0.5 mole fraction to 1 mole fraction of rare earth metal and 0.01 mole fraction to 0.5 mole fraction of divalent metal with respect to 1 mole fraction of transition metal oxide.
- the magnetic nanoparticles of the present invention can control the Curie temperature of the magnetic nanoparticles by -80 °C to 41 °C by controlling the mole fraction of each component within the above range.
- the magnetic nanoparticles of the present invention can construct a structure with other materials for additional functionality.
- the type of the structure is not particularly limited, and for example, a coreshell structure, a dumbbell structure, a cluster structure, a thin film structure, an alloy structure, a multilayered nanowire, or a combination thereof It may be a structure and the like.
- other materials constituting the structure together with the magnetic nanoparticles may be used according to the purpose of use, silica, ceramic materials, organic materials, metal materials, magnetic materials, polymers or semiconductor materials, but is not limited thereto. no.
- the magnetic nanoparticles according to the present invention may form a core portion, and may form a shell portion surrounding the core portion with the other material, and vice versa.
- the shell portion may be formed of the magnetic nanoparticles according to the present invention.
- the shell portion in the core shell structure has pores, may be in the form of a porous core shell.
- the porous core shell it is possible to carry a drug and the like, it can be utilized as a drug carrier.
- one side of the dumbbell is composed of the magnetic nanoparticles according to the present invention
- the other side is a magnetic material, a metal material, a polymer, a ceramic or a semiconductor material, depending on the purpose of use, such as other materials Can be configured.
- the magnetic nanoparticles and other materials according to the present invention for example, gold (Au) may be alternately formed to be a nanowire having a multilayer structure.
- the magnetic nanoparticles according to the present invention constitute one thin film, and the thin film composed of different materials may form a layered structure with the thin film composed of the magnetic nanoparticles according to the present invention.
- a structure having a complex structure for example, a structure in which a one-dimensional nanowire structure protrudes on a thin film structure or a structure in which spherical nanoparticles are attached to the nanowire may be used.
- the present invention also provides a method for preparing magnetic nanoparticles comprising the steps of: (a) reducing a precursor of a rare earth metal, a precursor of a divalent metal and a precursor of a transition metal oxide to form magnetic nanoparticles; And (b) relates to a method for producing a magnetic nanoparticles, comprising the step of heat-treating the magnetic nanoparticles.
- the precursor of the rare earth metal, the precursor of the divalent metal, the precursor of the transition metal oxide and the reducing agent are dissolved in a solvent before the step (a), and the temperature of 80 ° C. to 130 ° C. Heating, and uniformly mixing at the temperature for 1 to 2 hours.
- the kind of the precursor of the rare earth metal is not particularly limited, and any type of precursor may be used as long as it includes the above-described rare earth metal and can be reduced to become a rare earth metal through an oxidation-reduction reaction.
- a precursor of the rare earth metal lanthanum acetylacetonate (La (acac) 3 ) or lanthanum nitrate (La (NO 3 ) 3 6H 2 O), and the like, and preferably lanthanum Acetylacetonate, but is not limited thereto.
- the kind of precursor of the divalent metal is not particularly limited, and any type of precursor may be used as long as it includes the aforementioned divalent metal and may be reduced through an oxidation-reduction reaction to be a divalent metal.
- a precursor of a divalent metal strontium acetylacetonate (Sr (acac) 3 ) or strontium acetate (Sr (CH 3 COO) 2 ), and the like, and preferably strontium acetylacetonate May be, but is not limited thereto.
- the type of the precursor of the transition metal oxide in the present invention is not particularly limited, as long as it includes the above-described transition metal and can be reduced through an oxidation-reduction reaction to become a transition metal oxide, without limitation.
- manganese acetylacetonate (Mn (acac) 3 ) or manganese acetate (Mn (CH 3 COO) 2 4H 2 O) or the like may be used as a precursor of the transition metal oxide. Need acetylacetonate, but is not limited thereto.
- the mole fraction of the precursor of the rare earth metal, the precursor of the divalent metal and the precursor of the transition metal oxide is the same as described above.
- the reducing agent may reduce the rare earth metal precursor, the precursor of the divalent metal, and the precursor of the transition metal oxide, respectively, through an oxidation-reduction reaction so that the rare earth metal, the divalent metal, and the transition metal oxide may be aggregated into one nanoparticle.
- the kind of the reducing agent is not particularly limited, and any kind of reducing agent may be used as long as it can reduce the rare earth metal precursor, the precursor of the divalent metal, and the precursor of the transition metal oxide.
- any kind of reducing agent may be used as long as it can reduce the rare earth metal precursor, the precursor of the divalent metal, and the precursor of the transition metal oxide.
- 1,2-hexadecanediol (1,2-hexadecanediol), etc. may be mentioned as the reducing agent, but is not limited thereto.
- the content of the reducing agent is not particularly limited, and may be appropriately selected within a content range capable of reducing all of the precursor of the rare earth metal, the precursor of the divalent metal, and the precursor of the transition metal oxide.
- the kind of the solvent in the present invention is not particularly limited, and any solvent can be used as long as it can dissolve the precursor of the rare earth metal, the precursor of the divalent metal, the precursor of the transition metal oxide and the reducing agent.
- any solvent can be used as long as it can dissolve the precursor of the rare earth metal, the precursor of the divalent metal, the precursor of the transition metal oxide and the reducing agent.
- alkyl ether having an alkyl group having 1 to 12 carbon atoms for example, alkyl ether having an alkyl group having 1 to 12 carbon atoms, aryl ether having an aryl group having 6 to 18 carbon atoms, aralkyl ether having 7 to 21 carbon atoms or alkenyl ether having an alkenyl group having 2 to 12 carbon atoms And the like, but is not limited thereto.
- the content of the solvent is not particularly limited, and may be appropriately selected within a content range capable of dissolving all of the precursor of the rare earth metal, the precursor of the divalent metal, the precursor of the transition metal oxide and the reducing agent.
- the heating temperature is less than 80 ° C. in the preparation step of the mixed solution, there is a fear that the mixing of the components in the solvent may not be uniform.
- the precursor or the reducing agent may react in advance. .
- each component of a mixed solution can be made to mix uniformly.
- a surfactant may be further dissolved in a solvent together with a precursor of a rare earth metal, a precursor of a divalent metal, a precursor of a transition metal oxide, and a reducing agent.
- the dispersibility in the aqueous solution state of the magnetic nanoparticles can be improved, and the affinity for the biological material can be improved.
- the type of the surfactant is not particularly limited and may be any material as long as the material exhibits amphipathicity.
- examples of the surfactant may include at least one selected from the group consisting of polyalkylene glycol, polyetherimide, polyvinylpyrrolidone, hydrophilic vinyl polymer and copolymers of two or more of the above, but is not limited thereto. It doesn't happen.
- a copolymer when used as the surfactant, a block copolymer of polyethylene glycol (PEG) -polypropylene glycol (PPG) -polyethylene glycol (PEG) or polyethylene oxide (PEO) -polypropylene oxide (PPO) Block copolymers of polyethylene oxide (PEO) may be preferred.
- PEG polyethylene glycol
- PPG polypropylene glycol
- PEO polyethylene oxide
- PPO polypropylene oxide
- the method for preparing the magnetic nanoparticles of the present invention may be performed by reducing the precursor of the rare earth metal, the precursor of the divalent metal, and the precursor of the transition metal after preparing the mixed solution.
- the precursor component and the reducing agent included in the mixed solution may be oxidized through an oxidation-reduction reaction, and the respective precursor components may be reduced to rare earth metals, divalent metals, and transition metal oxides, respectively.
- the reducing may be performed by heating the mixed solution at 220 ° C. to 300 ° C. and maintaining the temperature at the temperature for 1 hour to 2 hours. If the heating temperature in the reduction step is less than 220 °C, the oxidation-reduction reaction of the precursor component and the reducing agent may be insignificant, and if it exceeds 300 °C, there is a fear that the aggregation phenomenon of the nanoparticles. In addition, by adjusting the holding time of the heating temperature as described above, it is possible to smoothly reduce the respective precursor components.
- each precursor component included in the mixed solution may be reduced to rare earth metal, divalent metal and transition metal oxide, and cooled to form magnetic nanoparticles.
- the cooling temperature is not particularly limited, and there is no limitation as long as it is a temperature at which the nano-sized particles can be formed.
- the method for cooling the mixed solution in the present invention is not particularly limited and may be used without limitation as long as it can be commonly used in the art.
- step (a) may be performed in an inert gas atmosphere such as argon gas.
- an inert gas atmosphere such as argon gas.
- the method of manufacturing the magnetic nanoparticles of the present invention may further include washing the magnetic nanoparticles formed in step (a) by using centrifugation and magnetic separation after step (a).
- anhydrous ethanol anhydrous ethanol
- the method of manufacturing the magnetic nanoparticles of the present invention may include (b) heat treating the magnetic nanoparticles.
- the crystallinity of the magnetic nanoparticles may be improved by performing the step (b), and thus the magnetic nanoparticles having the Curie temperature of 0 ° C. to 41 ° C. may be prepared.
- step (b) may be performed by heating the magnetic nanoparticles in a heating furnace at 300 ° C. to 1000 ° C., and maintaining the temperature at 1 ° C. to 13 hours.
- the type of the heating furnace is not particularly limited, and any means commonly used in this field may be used.
- a ceramic container is used as an example of the heating furnace, but is not limited thereto. If the heating temperature in the heat treatment step is less than 300 °C, there is a fear that the heat treatment effect is negligible, if it exceeds 1000 °C, there is a fear that the cost rise due to excessive heat consumption.
- the holding time of the heating temperature is preferably 2 hours to 12 hours, by controlling as described above, it is possible to improve the crystallinity of the magnetic nanoparticles.
- step (b) may be performed in a heating furnace filled with an inert gas, for example, argon gas or nitrogen gas, in order to control the degree of oxidation of the magnetic nanoparticles.
- an inert gas for example, argon gas or nitrogen gas
- step (b) may be performed in a heating furnace provided with an external magnetic field in order to control the magnetic properties of the magnetic nanoparticles.
- the type of the external magnetic field is not particularly limited, any magnetic field commonly used in the art may be used without limitation, and the strength of the external magnetic field may also be appropriately selected as necessary.
- the method of manufacturing the magnetic nanoparticles of the present invention may further include coating the magnetic nanoparticles with a coating material before step (b) in order to prevent sintering of the magnetic nanoparticles according to step (b).
- the type of coating material for coating the magnetic nanoparticles is not particularly limited, but preferably a ceramic material; Or a semiconductor material such as zinc oxide, magnesium oxide or aluminum oxide may be used.
- the method of coating the magnetic nanoparticles with the coating material is not particularly limited, and all means commonly used in the art may be used, but thermal decomposition may be preferably used.
- the magnetic nanoparticles according to the present invention can be separated using a method such as centrifugation.
- the method of manufacturing the magnetic nanoparticles of the present invention is another means for preventing sintering of the magnetic nanoparticles according to the step (b), further comprising the step of filling the magnetic nanoparticles in the nano-frame prior to step (b) It may include.
- the magnetic nanoparticles prepared in step (a) are filled in the nano-frame, and then placed in a heating furnace and heat treatment, the magnetic nanoparticles can be prevented from being sintered during the heat treatment process.
- Filling the magnetic nanoparticles prepared in step (a) in the nano-frame may be by the method described in Republic of Korea Patent Publication No. 10-2004-0084468.
- the manufacturing method of the magnetic nanoparticles of the present invention adds a separation process of some sintered magnetic nanoparticles, such as laser treatment or sonication, in order to remove some sintered magnetic nanoparticles that may occur by performing step (b). Can be done with
- the present invention also provides a magnetic nanoparticle according to the present invention described above; And it relates to a nanocomposite comprising a biological material bonded to the surface of the magnetic nanoparticles.
- the nanocomposite 1 of the present invention may include a magnetic nanoparticle 10 and a biological material 11 coupled to a surface of the magnetic nanoparticle 10.
- the type of biological agent bound to the surface of the magnetic nanoparticles is not particularly limited, but may preferably be an antigen, an antibody, a protein or a biocompatible polymer.
- the type of the antigen, antibody and protein in the present invention is not particularly limited and may be used without limitation as long as it can be used for the detection of a target substance in the art.
- the method of introducing the antigen, the antibody, the protein, etc. on the surface of the magnetic nanoparticles according to the present invention may be by a method well known in the art.
- the present invention for example, after coating the surface of the magnetic nanoparticles according to the present invention with gold (Au), by introducing a thiol group on the surface of the gold coating, antigens, antibodies, proteins and the like can be introduced.
- the biocompatible polymer may be attached to the surface of the magnetic nanoparticle according to the present invention, and the antigen, the antibody, the protein, or the like may be introduced by binding a functional group and a specific functional group present at the terminal of the biocompatible polymer.
- Antigens, antibodies, proteins and the like bound to the surface of the magnetic nanoparticles according to the present invention can be used for detection and isolation of target substances, for example, detection and quantification of target proteins.
- the biocompatible polymer bound to the surface of the magnetic nanoparticles may improve dispersibility in the aqueous solution state of the magnetic nanoparticles, and may improve affinity for the biomaterial.
- the type of the biocompatible polymer is not particularly limited, and any material that exhibits amphipathicity may be used without limitation.
- examples of the biocompatible polymer may include at least one selected from the group consisting of polyalkylene glycol, polyetherimide, polyvinylpyrrolidone, hydrophilic vinyl polymer, and copolymers of two or more of the above, but It is not limited.
- a block copolymer of polyethylene glycol (PEG) -polypropylene glycol (PPG) -polyethylene glycol (PEG) or polyethylene oxide (PEO) -polypropylene oxide (PPO) Block copolymers of) -polyethylene oxide (PEO) may be preferred.
- a method of introducing a biocompatible polymer to the surface of the magnetic nanoparticles according to the present invention is not particularly limited, and for example, performing the step (a) of the method of preparing the magnetic nanoparticles according to the present invention.
- a biocompatible polymer is prepared by dissolving a biocompatible polymer in a solvent together with a precursor of a rare earth metal, a precursor of a divalent metal, a precursor of a transition metal oxide, and a reducing agent. Magnetic nanoparticles combined with a polymer may be prepared.
- a stabilizer oleylamine C 9 H 17 NH 2
- the invention also provides a magnetic nanoparticles according to the invention or a nanocomposite according to the invention; And it relates to a composition for detecting a target substance comprising a magnetic-antibody complex.
- Detection means may be coupled to the surface of the magnetic nanoparticles or nanocomposites included in the composition for detecting a target substance of the present invention.
- the detection means 12 is coupled to the surface of the magnetic nanoparticles 10 of the present invention can be used as a composition for detecting a target substance.
- FIG. 3 is a view showing a nanocomposite of the present invention having a detection means coupled to a surface thereof.
- the detection means 12 may be coupled to the surface of the nanocomposite 2 of the present invention and used as a composition for detecting a target substance.
- the composition for detecting a target substance of the present invention such as ELISA method or Western blot method, to know the presence or amount of a specific antigen, for example, a specific protein or a specific cell, etc. Can be used.
- an antibody in a magnetic body-antibody complex may form a bond through an antigen-antibody reaction with the target substance.
- the target material which is an antigen
- the target material detection composition of the present invention comprising a magnetic-antibody complex capable of causing an antigen-antibody reaction with the target material
- the target material And the antibody portion of the magnetic body-antibody complex may form a complex consisting of the target substance-antibody-magnetic body through an antigen-antibody reaction.
- the magnetic nanoparticles or nanocomposites having the detection means bonded to the surface do not agglomerate due to loss of magnetism when the temperature is maintained above the Curie temperature, and are evenly dispersed in the composition.
- the magnetic nanoparticle or nanocomposite becomes ferromagnetic again and the magnetic body of the complex composed of the target substance-antibody-magnetic body The part and the attraction force can be acted on, causing agglomeration.
- the composition for detecting the target substance when the composition for detecting the target substance is washed, the individual magnetic nanoparticles or nanocomposites which are not aggregated together with the complex composed of the target substance-antibody-magnetic substance may be removed upon washing.
- a large complex consisting of a target material-antibody-magnetic-magnetic nanoparticle-detecting means or a large complex consisting of a target material-antibody-magnetic-nano complex-detecting means can be formed.
- the detection means of the large complex may transmit a specific signal according to the type of the detection means, thereby detecting the presence or absence of the target substance.
- a specific signal can be observed in the portion where the target substance is present, and a specific signal cannot be observed in the portion where the target substance is not present.
- FIG. 4 is a schematic diagram illustrating a detection process of a target substance using the composition for detecting a target substance according to one embodiment of the present invention.
- the target material 21 when the target material 21 is fixed to the substrate 20, the target material 21 and the antibody 23 cause an antigen-antibody reaction, and thereby, the target material 21- It is possible to form a complex composed of the antibody (23) -magnetic material (24).
- the magnetic nanoparticles 25 in which the detection means 26 are coupled to the surface of the magnetic nanoparticles lose their magnetic properties. It may not occur, but may exist in a dispersed manner.
- the magnetic nanoparticles 25 may again have ferromagnetic properties, and the magnetic body 24 may be attracted by the magnetic force. Accordingly, the macrocomposite 27 composed of the target material 21-the antibody 23-the magnetic material 24-the magnetic nanoparticles 25-the detection means 26, which is fixed to the substrate 20, can be formed. have.
- components other than the large complex 27, for example, magnetic nanoparticles having a detection means coupled thereto may be removed.
- the composition for detecting a target substance of the present invention can form a large complex through specific binding to a target substance and control of magnetic properties of magnetic nanoparticles, thereby improving a signal-to-noise ratio (signal purification). That is, the composition for detecting a target substance of the present invention can improve both specificity and sensitivity of the target substance.
- the detection means is not particularly limited, and any detection means that can be used for biological imaging can be used without limitation.
- a fluorescent material or a quantum dot may be used as the detection means, but is not limited thereto.
- the fluorescent material when used as the detection means, the presence of the target material may be confirmed, quantitatively analyzed, and separated through the fluorescent image.
- the specific kind of the fluorescent substance is not particularly limited, and examples thereof include rhodaman and its derivatives, fluorescein and its derivatives, coumarin and its derivatives, acridine and its derivatives, pyrene and its derivatives, and erythrosine. At least one selected from the group consisting of derivatives thereof, eosin and derivatives thereof, and 4-acetamido-4'-isothiocyanatostilben-2,2'disulfonic acid. More specifically illustrating the fluorescent material that can be used in the present invention is as follows.
- Rhodamine and its derivatives include 6-carboxy-X-rhodamine (ROX), 6-carboxyrodamine (R6G), lysamine rhodamine B sulfonyl chloride, rhodamine, rhodamine B, rhodamine 123, Rhodamine X isothiocyanate, sulforhodamine B, sulforhodamine 101, sulfonyl chloride derivatives (Texas Red) of sulforhodamine 101, N, N, N ', N'-tetramethyl-6-carboxyrodamine (TAMRA), tetramethyl rhodamine, tetramethyl rhodamine isothiocyanate (TRITC), riboflavin, rosolic acid, terbium chelate derivatives, Alexa derivatives, Alexa-350, Alexa-488, Alexa-547 and Alexa-647, etc. May be mentioned
- Pyrene and its derivatives include pyrene, pyrene butyrate, succinimidyl 1-pyrene butyrate, Reactive Red 4 (Cibacron Brilliant Red 3B-A), and the like;
- Erythrosine and its derivatives include erythrosin B, erythrosin isothiocyanate and ethidium;
- Eosin and Eosin isothiocyanate etc. are mentioned as Eosin and its derivatives ;
- the quantum dot when used as the detection means, the presence of the target substance may be confirmed, quantitatively analyzed and separated through a fluorescence image.
- the quantum dot may have a structure of a core body, a cell portion surrounding the core body, and a polymer coating layer coating the cell portion.
- the specific kind of the quantum dot is not particularly limited, and may be used without limitation as long as it has biocompatibility so that it can be used for biological imaging.
- the constituents of the quantum dots include CdSe (cadmium-cesium), CdTe (cadmium-telluride), CdS (cadmium sulfide), ZnSe (zinc-cesium), ZnO (zinc oxide) or ZnS (zinc sulfide). It may be used mainly, but is not limited thereto.
- the type of the magnetic body is not particularly limited, and any substance having magnetic properties may be used without limitation.
- the magnetic nanoparticles according to the present invention may be used as the magnetic material, or a conductive material may be used, but is not limited thereto.
- the specific kind of the conductive material is not particularly limited and may be, for example, a metal material, a magnetic material, or a magnetic alloy. More specifically illustrating the conductive material that can be used in the present invention are as follows.
- the metal material may include at least one selected from the group consisting of Pt, Pd, Ag, Cu, and Au
- the magnetic material may include one selected from the group consisting of Co, Mn, Fe, Ni, Gd, and Mo
- the magnetic alloy may be one or more selected from the group consisting of CoCu, CoPt, FePt, CoSm, NiFe, and NiFeCo, but is not limited thereto.
- the specific kind of the antibody is not particularly limited, and any type of antibody may be used without limitation as long as it can bind to a target substance to be described later through an antigen-antibody reaction.
- the target material to be detected using the composition for detecting a target material of the present invention is not particularly limited and may be, for example, one or more selected from the group consisting of protein, DNA and RNA.
- a specific kind of the protein, DNA, RNA is not particularly limited, and may be a tumor marker or a biomarker commonly used in this field.
- the target protein is PSA (prostate specific antigen), CEA (carcinoembryonic antigen) MUC1, AFP (alpha fetoprotein), CA 15-3 (carbohydrate antigen 15-3), CA 19-9 (carbohydrate antigen 19- 9), carbohydrate antigen 125 (CA 125), free prostate specific antigen (PSAF), prostate specific antigen-a1-anticymotrypsin comple (PSAC), prostatic acid phosphatase (PAP), human thyroglobulin (hTG), human chorionic gonadotropin beta ), Ferr (ferritin), NSE (neuron specific enolase, IL-2 (interleukin 2), IL-6 (interleukin 6), B2M (beta 2 macroglobulin) and A2M (alpha 2 macroglobulin) May be, but is not limited thereto.
- the PSA, PSAF, PSAC, A2M and PAP are useful tumor markers for the selection of prostate cancer
- the CEA is a glycoprotein and a useful tumor marker for the selection of gastric cancer
- MUC1 is ovarian cancer, breast cancer, myeloma
- CA 15-3 is a tumor marker expressed in lung cancer, pancreatic cancer, breast cancer, ovarian cancer or liver cancer
- CA 19-9 is lung cancer, ovarian cancer, Tumor markers expressed in liver cancer or colon cancer
- CA 125 is a tumor marker expressed in lung cancer, pancreatic cancer, breast cancer, ovarian cancer, liver cancer, colon cancer or uterine cancer
- hTG is a tumor marker expressed in thyroid cancer or Wilms tumor
- HCGb is It is a tumor marker expressed in lung cancer, pancreatic cancer, kidney cancer, ovarian cancer, liver cancer, brain tumor or bladder cancer
- Ferr is a tumor marker expressed in lung
- NSE is a tumor marker expressed in lung cancer, thyroid cancer, or Wilms' tumor
- IL-2 is a tumor marker expressed in kidney cancer or multiple myeloma
- IL-6 is expressed in kidney cancer, breast cancer, ovarian cancer, or multiple myeloma
- B2M is a tumor marker expressed in kidney cancer, ovarian cancer, prostate cancer or multiple myeloma.
- the target material DNA and RNA are not particularly limited and may be any gene as long as the gene is a disease virus causing an infectious disease caused by a virus.
- the DNA and RNA genes of HIV virus, hepatitis B virus gene, hepatitis C virus gene, malaria virus gene, swine flu gene or syphilis virus gene, etc. May be, but is not limited thereto.
- the present invention also comprises the steps of administering a composition for detecting a target substance according to the invention to a living body or a sample; And sensing a signal emitted by the nanocomposite from the living body or the sample to obtain an image.
- sample used in the present invention means a tissue or a cell separated from the subject to be diagnosed.
- the step of administering the composition for detecting a target substance of the present invention to a living body or a sample may be administered through a route commonly used in the medical field, parenteral administration is preferred, for example, intravenous, intraperitoneal Administration may be by intra, intramuscular, subcutaneous or local routes.
- MRI magnetic resonance imaging device
- optical imaging to detect a signal emitted by the fluorescent material or quantum dots.
- the "magnetic resonance imaging apparatus” is a radio wave of a certain frequency by placing a living body in a strong magnetic field to absorb energy into atomic nuclei such as hydrogen in the biological tissue to make a high energy state, the radio wave And the nuclear energy such as hydrogen is released, and the energy is converted into a signal and processed by a computer and imaged.
- the type of the magnetic resonance imaging apparatus is not particularly limited and may be, for example, a T2 spin-spin relaxation magnetic resonance imaging apparatus, but is not limited thereto.
- a confocal microscope, a fluorescence microscope, or a biooptical device may be used for the optical imaging, but is not limited thereto.
- a composition for detecting a target substance is administered to a living body or a sample, whereby a complex composed of a target substance-antibody-magnetic body through an antigen-antibody reaction with a specific antigen as a target substance Can be formed. Then, using the magnetocaloric effect (magnetocaloric effect) to maintain the temperature of the magnetic nanoparticles below the Curie temperature, as described above by the ferromagnetic properties of the magnetic nanoparticles, the target material-antibody- Large complexes of magnetic body-nanocomplex-detection means can be formed.
- the large complex including the detection means around the specific antigen is distributed in high concentration, so that the amplified video signal can be easily obtained.
- the magnetocaloric effect refers to a phenomenon of getting cold or hot due to a fast transition of the magnetization state of a magnetic material in an external magnetic field, and is well known in the art.
- the magnetic nanoparticles of the present invention were prepared by an improved nanoemulsion method based on the thermal decomposition method as follows.
- the lanthanum acetylacetonate, strontium acetylacetonate, and manganese acetylacetonate were respectively reacted with 1,2-hexadecanediol by heating the prepared mixed solution to 280 ° C. and maintaining them at 280 ° C. for 1.5 hours. It was reduced to lanthanum metal (La), strontium metal (Sr) and manganese oxide (MnO 3 ) through an oxidation-reduction reaction of.
- La lanthanum metal
- Sr strontium metal
- MnO 3 manganese oxide
- magnetic nanoparticles (LaSrMnO 3 ) in which lanthanum metal, strontium metal, and manganese oxide were aggregated were formed.
- the average diameter of the magnetic nanoparticles was about 30 nm.
- the formed magnetic nanoparticles were added to anhydrous ethanol and washed by centrifugation and magnetic separation to remove impurities.
- the washed magnetic nanoparticles were placed in a ceramic container, heated to 800 ° C., and maintained at 800 ° C. for 12 hours, thereby performing heat treatment.
- the mixed solution (1) 0.1576 g of a block copolymer of polyethylene glycol-polypropylene glycol-polyethylene glycol which is a biocompatible polymer (Aldrich Co., Ltd.) is used as a solvent of dioctyl ether (Wako Co., Ltd.).
- a nanocomposite as shown in FIG. 1 was prepared in the same manner as in Example 1, except that 15 ml was further dissolved.
- the magnetic nanoparticles prepared in Example 1 was dispersed in hexane, and dropped onto carbon-supperted copper grids to prepare a specimen for TEM measurement. . Thereafter, the specimens were observed using a transmission electron microscope (TEM) equipped with energy-dispersive X-ray spectroscopy (EDS) (Tecnai F20, manufactured by FEI).
- TEM transmission electron microscope
- EDS energy-dispersive X-ray spectroscopy
- TEM high-resolution transmission electron microscope
- FIG. 6 is a graph showing an X-ray diffraction (XRD) pattern of the magnetic nanoparticles according to the exemplary embodiment of the present invention. As shown in Figure 6, it can be seen that the magnetic nanoparticles of the present invention is excellent in crystallinity.
- XRD X-ray diffraction
- FIG. 7 is a graph of magnetization value-temperature (MT) of the magnetic nanoparticles under 100 Oe according to one embodiment of the present invention.
- the magnetic nanoparticles (La 0.75 Sr 0.25 (MnO 3 ) 1 ) of the present invention including rare earth metals, divalent metals, and transition metal oxides have zero magnetization values above 310 K (37 ° C.). It can be seen that.
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Abstract
Description
Claims (28)
- 희토류 금속, 2가 금속 및 전이금속 산화물을 포함하고,-80℃ 내지 41℃의 온도 범위에서 큐리 온도(curie temperature)를 가지는 자성 나노입자.
- 제 1 항에 있어서,큐리 온도가 0℃ 내지 41℃인 자성 나노입자.
- 제 1 항에 있어서,희토류 금속이 란타넘 계열의 금속인 자성 나노입자.
- 제 1 항에 있어서,2가 금속이 알칼리 토금속 또는 납(Pb)인 자성 나노입자.
- 제 1 항에 있어서,전이금속 산화물이 망간 산화물(manganese oxide)인 자성 나노입자.
- 제 1 항에 있어서,전이금속 산화물 1 몰 분율에 대하여 희토류 금속 0.5 몰 분율 내지 1 몰 분율 및 2가 금속 0.01 몰 분율 내지 0.5 몰 분율을 포함하는 자성 나노입자.
- (a) 희토류 금속의 전구체, 2가 금속의 전구체 및 전이금속 산화물의 전구체를 환원시키고, 자성 나노입자를 형성하는 단계; 및(b) 상기 자성 나노입자를 열처리 하는 단계를 포함하는,제 1 항에 따른 자성 나노입자의 제조 방법.
- 제 7 항에 있어서,(a) 단계 이전에 희토류 금속의 전구체, 2가 금속의 전구체, 전이금속 산화물의 전구체 및 환원제를 용매에 용해시켜, 80℃ 내지 130℃로 가열하고, 상기 온도에서 1 시간 내지 2 시간 동안 균일하게 혼합하는 단계를 추가로 포함하는 자성 나노입자의 제조 방법.
- 제 8 항에 있어서,혼합 용액의 제조 단계에서 희토류 금속의 전구체, 2가 금속의 전구체, 전이금속 산화물의 전구체 및 환원제와 함께 계면 활성제를 용매에 추가로 용해시키는 자성 나노입자의 제조 방법.
- 제 8 항에 있어서,환원은 혼합 용액을 220℃ 내지 300℃로 가열하고, 상기 온도에서 1 시간 내지 2 시간 동안 유지시킴으로써 수행되는 자성 나노입자의 제조 방법.
- 제 8 항에 있어서,자성 나노입자의 형성은 혼합 용액을 상온으로 냉각시킴으로써 수행되는 자성 나노입자의 제조 방법.
- 제 7 항에 있어서,(a) 단계 이후, 원심 분리 및 자성 분리를 이용하여 자성 나노입자를 세척하는 단계를 추가로 포함하는 자성 나노입자의 제조 방법.
- 제 7 항에 있어서,(b) 단계는 자성 나노입자를 300℃ 내지 1000℃로 가열하고, 상기 온도에서 1 시간 내지 13 시간 동안 유지함으로써 수행되는 자성 나노입자의 제조 방법.
- 제 13 항에 있어서,(b) 단계는 비활성 기체 분위기 하에서 수행되는 자성 나노입자의 제조 방법.
- 제 13 항에 있어서,(b) 단계는 외부 자기장 하에서 수행되는 자성 나노입자의 제조 방법.
- 제 7 항에 있어서,(b) 단계 이전에 자성 나노입자를 세라믹 물질 또는 반도체 물질로 코팅하는 단계를 추가로 포함하는 자성 나노입자의 제조 방법.
- 제 7 항에 있어서,(b) 단계 이전에 자성 나노입자를 나노틀에 충진하는 단계를 추가로 포함하는 자성 나노입자의 제조 방법.
- 제 1 항에 따른 자성 나노입자; 및상기 자성 나노입자의 표면에 결합된 생물 제재를 포함하는 나노 복합체.
- 제 18 항에 있어서,생물 제재는 항원, 항체, 단백질 및 생체적합성 고분자로 이루어진 군으로부터 선택되는 하나 이상인 나노 복합체.
- 제 19 항에 있어서,생체적합성 고분자는 폴리알킬렌글리콜, 폴리에테르이미드, 폴리비닐피롤리돈, 친수성 비닐계 고분자 및 상기 중 2 이상의 공중합체로 이루어진 군으로부터 선택되는 하나 이상인 나노 복합체.
- 제 20 항에 있어서,공중합체가 폴리에틸렌글리콜(PEG)-폴리프로필렌글리콜(PPG)-폴리에틸렌글리콜(PEG)의 블록 공중합체 또는 폴리에틸렌옥사이드(PEO)-폴리프로필렌옥사이드(PPO)-폴리에틸렌옥사이드(PEO)의 블록 공중합체인 나노 복합체.
- 제 1 항에 따른 자성 나노입자 또는 제 18 항에 따른 나노 복합체; 및자성체-항체 복합체를 포함하는 표적 물질 탐지용 조성물.
- 제 22 항에 있어서,자성 나노입자 또는 나노 복합체의 표면에는 검출 수단이 결합되어 있는 표적 물질 탐지용 조성물.
- 제 23 항에 있어서,검출 수단은 형광 물질 또는 양자점(quantum dot)인 표적 물질 탐지용 조성물.
- 제 24 항에 있어서,형광 물질은 로다민과 그의 유도체, 플루오레신과 그의 유도체, 쿠마린과 그의 유도체, 아크리딘과 그의 유도체, 피렌과 그의 유도체, 에리트로신과 그의 유도체, 에오신과 그의 유도체, 및 4-아세트아미도-4′-이소티오시아나토스틸벤-2,2′디설폰산으로 이루어진 군으로부터 선택되는 하나 이상인 표적 물질 탐지용 조성물.
- 제 22 항에 있어서,표적 물질은 단백질, DNA 및 RNA로 이루어진 군으로부터 선택되는 하나 이상인 표적 물질 탐지용 조성물.
- 제 26 항에 있어서,단백질은 PSA(prostate specific antigen),CEA(carcinoembryonic antigen) MUC1, AFP(alpha fetoprotein), CA 15-3(carbohydrate antigen 15-3), CA 19-9(carbohydrate antigen 19-9), CA 125(carbohydrate antigen 125), PSAF(free prostate specific antigen), PSAC(prostate specific antigen-a1-anticymotrypsin comple), PAP(prostatic acid phosphatase), hTG(human thyroglobulin), HCGb(human chorionic gonadotropin beta), Ferr(ferritin), NSE(neuron specific enolase, IL-2(interleukin 2), IL-6(interleukin 6), B2M(beta 2 macroglobulin) 및 A2M(alpha 2 macroglobulin)으로 이루어진 군으로부터 선택되는 하나 이상인 표적 물질 탐지용 조성물.
- 제 23 항에 따른 표적 물질 탐지용 조성물을 생체 또는 시료에 투여하는 단계; 및 상기 생체 또는 시료로부터 자성 나노입자 또는 나노 복합체에 의해 발산되는 신호를 감지하여 영상을 수득하는 단계를 포함하는, 생체 또는 시료의 영상 수득 방법.
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US13/982,819 US20130309702A1 (en) | 2011-01-31 | 2012-01-31 | Magnetic nanoparticle, having a curie temperature which is whithin biocompatible temperature range, and method for preparing same |
JP2013551917A JP5865396B2 (ja) | 2011-01-31 | 2012-01-31 | 生体適合温度内でキュリー温度を有する磁性ナノ粒子の製造方法及びそれを含む標的物質探知用組成物 |
US15/335,896 US20170095579A1 (en) | 2011-01-31 | 2016-10-27 | Composition for target substance detection comprising magnetic nanoparticle having a curie temperature which is within biocompatible temperature range and system for target substance detection |
US15/702,062 US20180003676A1 (en) | 2011-01-31 | 2017-09-12 | Magnetic nanoparticle, having a curie temperature which is within biocompatible temperature range, and method for preparing same |
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KR1020110009824A KR101379971B1 (ko) | 2011-01-31 | 2011-01-31 | 생체 적합 온도 내에서 큐리 온도를 가지는 자성 나노입자 및 그 제조 방법 |
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US15/335,896 Continuation-In-Part US20170095579A1 (en) | 2011-01-31 | 2016-10-27 | Composition for target substance detection comprising magnetic nanoparticle having a curie temperature which is within biocompatible temperature range and system for target substance detection |
US15/702,062 Division US20180003676A1 (en) | 2011-01-31 | 2017-09-12 | Magnetic nanoparticle, having a curie temperature which is within biocompatible temperature range, and method for preparing same |
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CN108241064A (zh) * | 2017-12-21 | 2018-07-03 | 江苏泽成生物技术有限公司 | 一种测定甲状腺球蛋白抗体含量的试剂盒及其测试方法 |
CN110323056A (zh) * | 2019-06-28 | 2019-10-11 | 武汉理工大学 | 一种解决磁性纳米颗粒在磁性纳米复合材料中团聚的方法 |
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EP2671570B1 (en) | 2018-05-30 |
EP2671570A4 (en) | 2015-05-27 |
US20180003676A1 (en) | 2018-01-04 |
KR20120099553A (ko) | 2012-09-11 |
US20130309702A1 (en) | 2013-11-21 |
WO2012105794A3 (ko) | 2012-10-26 |
JP5865396B2 (ja) | 2016-02-17 |
EP2671570A2 (en) | 2013-12-11 |
KR101379971B1 (ko) | 2014-04-10 |
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