WO2022037262A1 - 含有放射性核素的金属纳米颗粒、纳米材料及其制备方法和在制备靶向药物中的应用 - Google Patents
含有放射性核素的金属纳米颗粒、纳米材料及其制备方法和在制备靶向药物中的应用 Download PDFInfo
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
- A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
- A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
- A61K51/04—Organic compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
- A61K51/02—Preparations containing radioactive substances for use in therapy or testing in vivo characterised by the carrier, i.e. characterised by the agent or material covalently linked or complexing the radioactive nucleus
- A61K51/04—Organic compounds
- A61K51/08—Peptides, e.g. proteins, carriers being peptides, polyamino acids, proteins
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K51/00—Preparations containing radioactive substances for use in therapy or testing in vivo
Definitions
- the present invention relates to metal nanoparticles containing radionuclides, nanomaterials, preparation methods thereof, and applications in the preparation of targeted drugs.
- Radioactive nanomedicines play an increasingly important role in the diagnosis and treatment of various diseases, and one of the key technologies for constructing radioactive nanomedicines is to achieve efficient and stable nuclide labeling.
- various methods of nuclide labeling of nanomaterials have been proposed. The reported methods are mainly divided into two categories: extra-nuclide labeling and intra-nuclide labeling.
- Exo-nuclide labeling is currently the most commonly used method for radiopharmaceutical nuclide labeling. It uses chelating agents to coordinately combine with nuclides to achieve rapid and efficient labeling.
- the commonly used chelating agents are DOTA (1, 4, 7, 10- Tetraazacyclododecane-1,4,7,10-tetraacetic acid), NOTA (1,4,7-sodium azide-1,4,7-triacetic acid), DTPA (diethylenetriaminepenta acetic acid) etc.
- DOTA 1, 4, 7, 10- Tetraazacyclododecane-1,4,7,10-tetraacetic acid
- NOTA 1,4,7-sodium azide-1,4,7-triacetic acid
- DTPA diethylenetriaminepenta acetic acid
- Intranuclide labeling is a chelating ligand-free nuclide labeling method, which utilizes the unique physical and chemical properties of nanoparticles or a special chemical reaction process to dope the nuclide inside the nanocarrier.
- the method of intranuclide labeling has the advantages of rapidity, simplicity, good labeling stability, and no interference from chelating agents and ligands.
- Ion exchange method and “proton beam excitation” four methods. Among them, the "cold-hot precursor mixing method” is the most widely studied. The basic principle is to mix radionuclide ions with non-radioactive compounds to carry out chemical synthesis reactions together, and then realize nuclide labeling.
- nuclide labeling methods use chelating agents to couple the nuclide to the drug carrier.
- the introduction of the chelating agent may change the pharmacokinetic behavior of the drug;
- the existing nuclide internal labeling method can only label a few nuclides with similar chemical properties to the carrier element, which limits the simultaneous labeling of multiple nuclides;
- the existing nuclear medicine labeling methods require a smaller reaction system to improve the labeling efficiency.
- the reaction volume is tens to hundreds of microliters. Although the reaction in a small system can improve the labeling efficiency, it limits the radiopharmaceuticals. Large-scale synthesis and preparation.
- One of the objectives of the present invention is to overcome the deficiencies in the prior art, to provide a metal nanoparticle containing a radioactive metal nuclide, a preparation method thereof, and an application in the preparation of a targeted drug.
- Metal nanoparticles containing radionuclides characterized in that, the metal nanoparticles containing radionuclides include radionuclides and metal nanoparticles; the radionuclides are doped and/or labeled on the metal nanoparticles middle.
- the radionuclide is doped in the crystal lattice of the metal nanoparticle and/or labeled on the surface of the crystal lattice of the metal nanoparticle.
- the radionuclide is selected from one or more of 68 Ga, 177 Lu, 198 Au, 64 Cu, 89 Zr, 90 Y, and 89 Sr.
- the metal nanoparticles are metal nanoparticles containing gold, silver or copper.
- the gold-containing metal nanoparticles are single metal nanoparticles of gold, silver or copper.
- the metal nanoparticles are mixed metal nanoparticles, and the mixed metal nanoparticles include at least two metals from gold, silver or copper.
- the metal nanoparticles are sulfur-containing metal nanoparticles, and the sulfur-containing metal nanoparticles include one or more metals in gold, silver or copper; in the sulfur-containing metal nanoparticles In the metal nanoparticles, the weight content of metal is greater than that of sulfur.
- a nanomaterial is characterized by comprising the aforementioned metal nanoparticles containing radionuclides and organic substances containing thiol groups.
- the organic substance containing a thiol group coats the metal nanoparticle containing a radioactive metal nuclide.
- the number of thiol groups in the organic substance is greater than or equal to 1.
- the organic substances containing thiol groups include small peptides, amino acids, deoxyribonucleic acids, proteins, polyethylene glycol containing thiol groups or amphoteric compounds with equal positive and negative charges and One or more of alkanethiols.
- the small peptide is a cysteine-containing small peptide.
- the small peptide comprises one or more of glutathione, RGD peptide and octreotide.
- the preparation method of the aforementioned nanomaterial is characterized in that, comprises the steps:
- step (3) is performed after step (2); if a water-soluble metal salt of gold is not added in step (1), step (1) is performed Then proceed directly to step (3).
- the pH value of the reaction solution in the step (1) is adjusted to 6.5-7.5; in the step (3), the reaction solution obtained in the step (2) is at 40 React at °C ⁇ 75°C.
- the pH value of the reaction solution obtained in the step (1) is adjusted to 3-6.5; in the step (3), the reaction solution obtained in the step (2) is adjusted The solution was reacted at 75°C-120°C.
- the radionuclide salt is a water-soluble salt.
- the radionuclide salt is a hydrochloride and/or nitrate of a radionuclide.
- a water-soluble alkali or a water-soluble carbonate is used to adjust the pH value of the reaction solution.
- the water-soluble alkali includes one or more of potassium hydroxide, sodium hydroxide, and ammonia;
- the water-soluble carbonate includes potassium carbonate, hydrogen carbonate One or more of potassium, sodium carbonate and sodium bicarbonate.
- the molar ratio of the water-soluble metal salt to the organic substance containing a mercapto group is 1:(1.5-3).
- step (4) it further comprises step (4), ultrafiltration of the solution obtained in step (3), and washing with a phosphate buffer solution.
- the number of thiol groups in the organic substance is greater than or equal to 1.
- the organic substance containing a thiol group is selected from small peptides, amino acids, deoxyribonucleic acid, proteins, polyethylene glycol containing a thiol group or amphoteric compounds with equal positive and negative charges and one or more of alkanethiols.
- the small peptide is a cysteine-containing small peptide.
- the small peptide is selected from one or more of glutathione, RGD peptide and octreotide and derivatives thereof.
- step (3) further comprises adding a water-soluble alkaline sulfide.
- the water-soluble alkaline sulfide is ammonium sulfide, sodium sulfide or potassium sulfide.
- the metal nanoparticles containing radionuclides, the nanomaterials, the preparation method thereof, and the application in the preparation of targeted drugs in the present invention realize ligand-free and ligand-free nuclide labeling based on metal nanoparticles.
- the ligand-free labeling of the present invention establishes a general method, realizes individual or simultaneous labeling of multiple radioactive metal nuclides, and broadens the application of radioactive metal nuclides in radioactive nano-drugs.
- the invention realizes that the nuclide can still be efficiently labeled under the condition of large-scale system synthesis, and promotes the large-scale synthesis of radioactive nano-medicine.
- the invention establishes a novel radionuclide labeling method based on metal nanoparticles, so that the nanomaterials have better targeting properties, minimize aggregation in the liver and spleen, and reduce damage to normal tissues and organs.
- the radionuclide involved in the present invention has no ligand labeling, and through doping, the radionuclide occupies the crystal lattice of the metal nanocluster particles in the form of atoms, which greatly improves the stability of the radioactive metal nuclide labeling.
- the invention can realize broad-spectrum labeling of radionuclides, and multiple radionuclides can be labeled individually or simultaneously, such as labeling of 68 Ga, 177 Lu, 198 Au, 64 Cu, 89 Zr, 89 Sr, 90 Y, etc.
- Traditional nuclide internal standard methods can only label radioactive metal nuclides with the same or similar chemical properties as the carrier element.
- the simultaneous labeling of multiple radionuclides can provide a powerful tool for the integration of diagnosis and treatment, such as 68 Ga/ 177 Lu, 64 Cu/ 177 Lu, 89 Zr/ 177 Lu, 68 Ga/ 90 Y, 64 Cu/ 90 Y, 89 Zr / 90 Y et al.
- the radionuclide labeling method involved in the present invention can realize large-scale and large-volume synthesis, and the volume can reach 500 mL of product; it breaks the limitation that the traditional radionuclide labeling method must be a small system, only tens of microliters to hundreds of microliters, and The radioactive nanomaterials synthesized by this method have >90% yield and >90% labeling rate.
- the radiopharmaceuticals that can be made from the synthesized products of the present invention take ultra-small particle size metal nanoparticles as carriers, which can be cleared by the kidneys, greatly reducing the long-term toxicity caused by traditional nanoparticles to organs such as liver and spleen due to accumulation in the body. At the same time, this nanomaterial has better tumor targeting, and it is easy to achieve active targeting of tumors by coupling targeting molecules.
- Fig. 1 is the stability curve of the nuclide labeling of RGD-GS- 177 LuAu NCs prepared in Example 1 of the present invention.
- Figure 2 is the UV-Vis absorption spectrum and product photo (inset) of the RGD-GS- 177 LuAu NCs material prepared in Example 1 of the present invention.
- Example 3 is a transmission electron microscope (TEM) characterization diagram of the RGD-GS- 177 LuAu NCs material prepared in Example 1 of the present invention.
- Figure 4 is the particle size distribution diagram of the RGD-GS- 177 LuAu NCs product in Example 1 of the present invention and its Gaussian distribution fitting curve. The figure shows that the particle size of the synthesized product is concentrated at about 2 nm, and the particle size distribution is relatively uniform.
- FIG. 5 is the stability curve of the nuclide labeling of RGD-GS- 68 GaAu NCs prepared in Example 2 of the present invention.
- Fig. 6 is the particle size distribution histogram of the F-GS- 68 GaAu NCs product in Example 16 of the present invention and its Gaussian distribution fitting curve, the figure shows that the particle size of the synthesized product is concentrated at about 1 nm, and the particle size distribution is relatively uniform .
- Example 7 is a UV-Vis absorption spectrum diagram of the F-GS- 68 GaAu NCs product prepared in Example 16 of the present invention.
- FIG. 8 is the fluorescence spectrum of the F-GS- 68 GaAu NCs product in Example 16 of the present invention.
- FIG. 9 is a TEM characterization diagram of the F-GS- 68 GaAu NCs product in Example 16 of the present invention.
- the basic principle of the metal nanoparticles containing radioactive metal nuclides in the present invention is metal doping, that is, a radionuclide such as one of 68 Ga, 177 Lu, 198 Au, 64 Cu, 89 Zr, 90 Y, and 89 Sr, etc. Or several kinds are doped into the crystal structure of the metal nanoparticle, and the radioactive metal nuclide doped into the metal nanoparticle has excellent stability because it occupies the lattice position of the metal nanoparticle itself.
- the technical core of the method of the present invention lies in the co-reduction of water-soluble metal salts and radionuclide salts of gold, silver or copper by organic substances containing sulfhydryl groups, and the reaction is divided into the following processes:
- the gold-containing product in step (1) is gradually digested and dissolved in water at a certain pH value and reaction temperature;
- the water-soluble metal salts of gold, silver or copper and the radionuclide salt solution to be labeled are mixed in ultrapure water, then small peptides are added, and the reaction is stirred at room temperature. At this time, the sulfhydryl groups on the surface of small peptides will interact with gold The gold ions in the water-soluble metal salts react with the radionuclide metal ions to form white flocs that are insoluble in water. With the extension of time, the white flocs continued to increase until there was no significant change.
- the alkaline solution is added dropwise to the reaction solution in step (1), and the pH value of the reaction solution is adjusted to 6.5-7.5; and the reaction system is colorless and transparent until the white flocs are completely dissolved.
- the water-insoluble white flocs in step (1) are digested to be colorless and transparent, and metal nano-cluster particles are preliminarily formed.
- the reaction solution in step (2) is placed in a water bath at 40°C to 75°C and stirred slowly for 30 minutes to generate metal nanoparticles with a particle size of about 2 nm.
- the metal nanocluster particles are doped with radionuclides.
- the doping amount of the radionuclide can be adjusted by changing the amount of the radionuclide salt added before the reaction.
- the nuclide-containing metal nanoparticles are coated with small peptides.
- the rate of nuclide labeling (%) the radioactivity of the product/(the radioactivity of the product+the radioactivity of the filtrate) ⁇ 100%.
- Radiochemical purity 1 ⁇ L of the product was added dropwise to instant thin-layer chromatography paper, and radioactive thin-layer chromatography was carried out to obtain radiochemical purity.
- the final product was characterized by particle size, morphology, UV-Vis absorption spectrum and atomic absorption spectrum, and it was confirmed as the expected product.
- This example takes GS- 177 LuAu NCs (referred to as RGD-GS- 177 LuAu NCs) radioactive nanomaterials coated with c(RGDyC) cyclic small peptides as an example and a synthesis method thereof.
- RGD-GS- 177 LuAu NCs HAuCl 4 was reduced to gold nanoparticles by GSH and cyclic RGD small peptide c (RGDyC), and 177 Lu was doped into the lattice of gold nanoparticles in the form of atoms, and the final product was Colorless transparent liquid.
- the final product after purification is GS- 177 LuAu NCs coated with cyclic small peptide c (RGDyC).
- the final reaction pH of this example is about 7.0, and the reaction temperature is 60°C.
- the preparation method includes the following steps:
- the ratio of the moles of HAuCl 4 ⁇ 3H 2 O to GSH and cyclic RGD cyclic peptide is 1:2, and each molecule of GSH and cyclic RGD cyclic peptide contains a sulfhydryl group.
- reaction system changed from light yellow to yellowish brown, and then quickly changed to colorless, and then white flocs were formed, and the white flocs were [Au(I)-SG] high polymers.
- Radionuclide labeling rate take the final product and filtrate to measure their radioactivity, and calculate the labeling rate according to the following formula:
- the rate of nuclide labeling (%) the radioactivity of the product/(the radioactivity of the product + the radioactivity of the filtrate) ⁇ 100%;
- Radiochemical purity 1 ⁇ L of the product was added dropwise to instant thin-layer chromatography paper, and radioactive thin-layer chromatography was carried out to obtain radiochemical purity.
- Figure 1 shows the nuclide stability of gold nanoparticles labeled with 177 Lu in rat serum. It can be seen from the figure that the RGD-GS- 177 LuAu NCs material still has >80% stability after three days. The rate is above 90%.
- Figure 2 shows the UV-Vis absorption spectrum of the synthesized RGD-GS- 177 LuAuNCs material.
- FIG. 3 is the TEM image of the RGD-GS- 177 LuAuNCs material
- Figure 4 is the particle size distribution diagram of the RGD-GS- 177 LuAu NCs product in Example 1 of the present invention and its Gaussian distribution fitting curve. It can be seen from Figure 3 and Figure 4 that the particle size distribution of the material is uniform, about 2nm.
- This example takes GS- 68 GaAu NCs (referred to as RGD-GS- 68 GaAu NCs for short) radioactive nanomaterials coated with cyclic RGD cyclic peptides as an example and a synthesis method thereof.
- RGD-GS- 68 GaAu NCs radioactive nanomaterials coated with cyclic RGD cyclic peptides
- HAuCl 4 was reduced to gold nanoparticles by GSH and RGD cyclic peptide c (RGDyC), and 68 Ga was doped into the lattice of gold nanoparticles in the form of atoms.
- the final product is a colorless transparent nanoparticle suspension.
- the final reaction pH of this example was 6.8, and the reaction temperature was 50°C.
- the preparation method includes the following steps:
- the ratio of the moles of HAuCl 4 ⁇ 3H 2 O to GSH and cyclic RGD cyclic peptide is 1:2, and each molecule of GSH and cyclic RGD small peptide contains a sulfhydryl group.
- the white floc is [Au(I)-SG] high polymer.
- Figure 5 shows the nuclide stability of 68 Ga-labeled gold nanoparticles in rat serum. It can be seen from the figure that the RGD-GS- 68 GaAuNCs material still has high nuclide stability when it is close to two half-lives (>80% in one half-life), the nuclide labeling rate is above 90%.
- This example takes GS- 68 Ga 177 LuAuNCs (referred to as RGD-GS- 68 Ga 177 LuAuNCs) radioactive nanomaterials coated with c(RGDyC) cyclic small peptides as an example and a synthesis method thereof.
- HAuCl 4 was reduced to gold nanoparticles by GSH and RGD small peptide c (RGDyc), and 68 Ga and 177 Lu were doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final product is a colorless transparent nanoparticle suspension.
- the final reaction pH of this example was 7.5, and the reaction temperature was 70°C.
- the preparation method includes the following steps:
- the ratio of the moles of HAuCl 4 ⁇ 3H 2 O to GSH and cyclic RGD small peptide is 1:2, and each molecule of GSH and cyclic RGD small peptide contains a sulfhydryl group.
- reaction system changed from light yellow to yellowish brown, then quickly changed to colorless, and then formed a white floc, which is [Au(I)-SG] high polymer.
- This example takes 68 Ga 177 LuAu NCs (referred to as RGD-GS- 68 Ga 177 LuAuNCs for short) radioactive nanomaterials coated with c(RGDyC) cyclic small peptides as an example and a synthesis method thereof.
- HAuCl 4 was reduced to gold nanoparticles by GSH and RGD cyclic peptide c (RGDyc), and 68 Ga and 177 Lu were doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final reaction pH of this example was 6.5, and the reaction temperature was 40°C.
- the preparation method includes the following steps:
- the ratio of the moles of HAuCl 4 ⁇ 3H 2 O to GSH and cyclic RGD small peptide is 1:2, and each molecule of GSH and cyclic RGD small peptide contains a sulfhydryl group.
- reaction system changed from light yellow to yellowish brown, then quickly changed to colorless, and then formed a white floc, which is [Au(I)-SG] high polymer.
- 68 Ga 177 LuAu NCs radioactive nanomaterials (Cys- 68 Ga 177 LuAu NCs for short) were synthesized by using cysteine Cys as a reducing agent.
- Cys- 68 Ga 177 LuAu NCs HAuCl 4 was reduced to gold nanoparticles by Cys, and 68 Ga and 77 Lu were doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final product is a colorless transparent nanoparticle suspension.
- the final reaction pH of this example was 7.0, and the reaction temperature was 60°C.
- the preparation method includes the following steps:
- reaction system changed from light yellow to yellowish brown, then quickly changed to colorless, and then formed a white floc, which is [Au(I)-SG] high polymer.
- 68 Ga 177 LuAu NCs radioactive nanomaterials (Cys- 68 Ga 177 LuAu NCs for short) were synthesized by using cysteine Cys as a reducing agent.
- Cys- 68 Ga 177 LuAu NCs HAuCl 4 was reduced to gold nanoparticles by Cys, and 68 Ga and 77 Lu were doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final product is a colorless transparent nanoparticle suspension.
- the final reaction pH of this example was 6.8, and the reaction temperature was 50°C.
- the preparation method includes the following steps:
- reaction system changed from light yellow to yellowish brown, then quickly changed to colorless, and then formed a white floc, which is [Au(I)-SG] high polymer.
- DMSA 2,3-dimercaptosuccinic acid
- the preparation method includes the following steps:
- the purification, concentration and characterization of nanomaterials are the same as in Example 1.
- the characterization results show that the generated gold nanoparticles have a particle size distribution of about 2 nm, a high nuclide labeling rate (>90%), and a good stability (>80% within a half-life).
- DMSA 2,3-dimercaptosuccinic acid
- the preparation method includes the following steps:
- DMSA 2,3-dimercaptosuccinic acid
- the preparation method includes the following steps:
- GSH glutathione
- GS- 68 Ga 177 LuCuAu NCs label 68 Ga and 177 Lu
- the molar ratio of Au to Cu is 9:1, but it is not limited to this ratio.
- the preparation method includes the following steps:
- TDDM dodecyl mercaptan
- a reducing agent to synthesize gold nanoparticles
- label 68 Ga and 177 Lu (abbreviated as TDDM- 68 Ga 177 LuAu NCs).
- HAuCl 4 was reduced to gold nanoparticles by TDDM, and 68 Ga and 177 Lu were doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final reaction pH of this example was 6.6, and the reaction temperature was 63°C.
- the preparation method includes the following steps:
- DNA-SH was used as a reducing agent to synthesize gold nanoparticles, and 68 Ga and 177 Lu were labeled (referred to as DNA- 68 Ga 177 LuAu NCs).
- DNA- 68 Ga 177 LuAu NCs HAuCl 4 was reduced to gold nanoparticles by sulfhydryl groups coupled on DNA, and 68 Ga and 177 Lu were doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final reaction pH of this example was 7.1, and the reaction temperature was 580°C.
- the preparation method includes the following steps:
- the purification, concentration and characterization of nanomaterials are the same as in Example 1.
- the characterization results show that the generated gold nanoparticles have a particle size distribution of about 2 nm, a high nuclide labeling rate (>90%), and a good stability (>80% within a half-life).
- PEG-SH was used as a reducing agent to synthesize gold nanoparticles, and label 68 Ga and 177 Lu (referred to as DNA- 68 Ga 177 LuAu NCs).
- DNA- 68 Ga 177 LuAu NCs label 68 Ga and 177 Lu
- HAuCl 4 was reduced to gold nanoparticles by sulfhydryl groups coupled on DNA, and 68 Ga and 177 Lu were doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final reaction pH of this example was 6.9, and the reaction temperature was 60°C.
- the preparation method includes the following steps:
- GSH glutathione
- HAuCl 4 was reduced to gold nanoparticles by GSH, and 68 Ga was doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final reaction pH of this example was 7.0, and the reaction temperature was 40°C.
- the preparation method includes the following steps:
- GSH glutathione
- HAuCl 4 was reduced to gold nanoparticles by GSH, and 68 Ga was doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final reaction pH of this example was 7.5, and the reaction temperature was 60°C.
- the preparation method includes the following steps:
- reaction temperature 75-120°C
- reaction pH 3-6.5
- GSH is used as a reducing agent to synthesize metal nanoparticles with fluorescent properties at a relatively high temperature (100° C.), and label 68 Ga (abbreviated as F-GS- 68 GaAu NCs).
- the preparation method includes the steps:
- Example 1-15 Difference: the product properties of Example 1-15 are colorless and transparent, and the present embodiment and the following examples are light yellow; 1nm); the ultraviolet-visible absorption spectra of the two products are slightly different, but both can indicate that the products are ultra-small particle size gold nanoparticles; Examples 1-15 have no fluorescence properties, and this example has green fluorescence.
- the process of nuclide labeling rate, stability, material purification and concentration, and material characterization is the same as that of Example 1.
- the characterization results show that the particle size distribution of the generated gold nanoparticles is about 1 nm, and there are shoulder peaks of characteristic absorption at 330 nm and 375 nm. (>90%), good stability (>80% within one half-life).
- GSH was used as a reducing agent to synthesize metal nanoparticles with fluorescent properties at a relatively high temperature (120° C.), and simultaneously label 68 Ga and 177 Lu (referred to as F-GS- 68 Ga 177 LuAu NCs).
- the preparation method includes the following steps:
- cysteine was used as a reducing agent to synthesize metal nanoparticles with fluorescent properties at a relatively high temperature (75°C), and simultaneously label 68 Ga and 177 Lu (referred to as F-CyS- 68 Ga for short). 177 LuAu NCs).
- the preparation method includes the following steps:
- GSH glutathione
- HAuCl 4 was reduced to gold nanoparticles by GSH, and 68 Ga was doped into the crystal lattice of gold nanoparticles in the form of atoms.
- the final reaction pH of this example was 6.5, and the reaction temperature was 90°C.
- the preparation method includes the steps:
- the process of nuclide labeling rate, stability, material purification and concentration, and material characterization is the same as that of Example 1.
- the characterization results show that the particle size distribution of the generated gold nanoparticles is about 1 nm, and there are shoulder peaks of characteristic absorption at 330 nm and 375 nm. (>90%), good stability (>80% within one half-life).
- BSA was used as a reducing agent and a stabilizer to synthesize Ag 2 S nanoparticles, and 177 Lu nuclide was labeled at the same time to obtain the final product BSA@ 177 LuAg 2 S radioactive nanoparticles.
- the preparation method is as follows:
- the characterization results show that the particle size distribution of the finally generated BSA@ 177 LuAg 2 S nanoparticles is between 1.5-2 nm, the nuclide labeling rate is >90%, and the stability of nuclide labeling is >80% within one half-life.
- BSA is used as a reducing agent and a stabilizer to synthesize Ag 2 S nanoparticles, and simultaneously label 64 Cu nuclide to obtain the final product BSA@ 64 CuAg 2 S radioactive nanoparticles.
- the preparation method is as follows:
- the characterization results show that the particle size distribution of the final BSA@ 64CuAg 2 S nanoparticles is between 1.5-2 nm, the nuclide labeling rate is >90%, and the stability of nuclide labeling is >80% within a half-life.
- BSA is used as a reducing agent and a stabilizer to synthesize CuS nanoparticles, and at the same time, 64 Cu nuclide is labeled to obtain the final product BSA@ 64 CuCuS radioactive nanoparticles.
- the preparation method is as follows:
- the characterization results show that the particle size distribution of the final BSA@ 64CuCuS nanoparticles is about 5nm, the nuclide labeling rate is >90%, and the stability of nuclide labeling is >80% within a half-life.
- BSA was used as reducing agent and stabilizer to synthesize CuS nanoparticles, and 177 Lu nuclide was labeled at the same time to obtain the final product BSA@ 177 LuCuS radioactive nanoparticles.
- the preparation method is as follows:
- the characterization results show that the particle size distribution of the final BSA@ 177 LuCuS nanoparticles is about 5 nm, the nuclide labeling rate is >90%, and the stability of nuclide labeling is >80% within a half-life.
- the nuclide label is replaced with one or several combinations of 198 Au, 64 Cu, 89 Zr, 90 Y and 89 Sr, and the same can be obtained.
- the nuclide-labeled metal nanoparticles coated with sulfhydryl group organic matter have a particle size of about 2 nm and a labeling rate of more than 80; the stability within one half-life is greater than 80%.
- the metal nanoparticles are made of gold-silver alloy, and the nuclide-labeled metal nanoparticles coated with mercapto group organics can also be obtained, and the particle size is about 2 nm. , the labeling rate reaches more than 80; the stability within one half-life is greater than 80%.
- the nitrate of the metal nuclide can also be used instead of the hydrochloride, and the nuclide-labeled metal nanoparticles coated with the sulfhydryl group organic matter can also be obtained. ; Stability greater than 80% within one half-life.
- one or more of potassium hydroxide, ammonia water can also be used; one or more of potassium carbonate, potassium bicarbonate, sodium carbonate, sodium bicarbonate replaces sodium hydroxide to adjust the pH value, and the same
- potassium carbonate, potassium bicarbonate, sodium carbonate, sodium bicarbonate replaces sodium hydroxide to adjust the pH value, and the same
- the nuclide-labeled metal nanoparticles coated with thiol group organic matter can be obtained, the particle size is about 2 nm, the labeling rate reaches more than 80, and the stability in one half-life period is greater than 80%.
- the molar ratio of chloroauric acid and the organic substance containing sulfhydryl groups was changed to 1; 1.5, 1:1.8, 1:1.9, 1:2.3, 1:2.6, 1:2.7, 1:3, the same
- the nuclide-labeled metal nanoparticles coated with thiol group organic matter can be obtained, the particle size is about 2 nm, the labeling rate reaches more than 80, and the stability in one half-life period is greater than 80%.
- the metal nanoparticles and nanomaterials containing radionuclides in the present invention are especially suitable for preparing targeted drugs for diagnosis and treatment.
- the metal nanoparticles containing radionuclides, the nanomaterials, the preparation method thereof, and the application in the preparation of targeted drugs in the present invention realize ligand-free and ligand-free nuclide labeling based on metal nanoparticles.
- the ligand-free labeling of the present invention establishes a general method, realizes individual or simultaneous labeling of multiple radioactive metal nuclides, and broadens the application of radioactive metal nuclides in radioactive nano-drugs.
- the invention realizes that the nuclide can still be efficiently labeled under the condition of large-scale system synthesis, and promotes the large-scale synthesis of radioactive nano-medicine.
- the invention establishes a novel radionuclide labeling method based on metal nanoparticles, so that the nanomaterials have better targeting properties, minimize aggregation in the liver and spleen, and reduce damage to normal tissues and organs.
- the radionuclide involved in the present invention is a ligand-free label, and through doping, the radionuclide occupies the crystal lattice of the metal nanocluster particles in the form of atoms, which greatly improves the stability of the radioactive metal nuclide label.
- the invention can realize broad-spectrum labeling of radionuclides, and multiple radionuclides can be labeled individually or simultaneously, such as labeling of 68 Ga, 177 Lu, 198 Au, 64 Cu, 89 Zr, 89 Sr, and 90 Y), etc., It breaks the traditional nuclide internal standard method and can only label radioactive metal nuclides with the same or similar chemical properties as the carrier element.
- the simultaneous labeling of multiple radionuclides can provide a powerful tool for the integration of diagnosis and treatment, such as 68 Ga/ 177 Lu, 64 Cu/ 177 Lu, 89 Zr/ 177 Lu, 68 Ga/ 90 Y, 64 Cu/ 90 Y, 89 Zr / 90 Y et al.
- the radionuclide labeling method involved in the present invention can realize large-scale and large-volume synthesis, and the volume can reach 500 mL of product; it breaks the limitation that the traditional radionuclide labeling method must be a small system, only tens of microliters to hundreds of microliters, and The radioactive nanomaterials synthesized by this method have >90% yield and >90% labeling rate.
- the radiopharmaceuticals that can be made from the synthesized products of the present invention use ultra-small particle size metal nanoparticles as carriers, which can be eliminated by the kidneys, which greatly reduces the long-term toxicity of traditional nanoparticles to the liver, spleen and other organs caused by accumulation in the body.
- this nanomaterial has better tumor targeting, and it is easy to achieve active targeting of tumors by coupling targeting molecules.
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Abstract
Description
Claims (30)
- 含有放射性核素的金属纳米颗粒,其特征在于,所述含有放射性核素的金属纳米颗粒包括放射性核素和金属纳米颗粒;所述放射性核素掺杂于所述金属纳米颗粒中和/或标记于所述金属纳米颗粒的表面。
- 根据权利要求1所述的含有放射性金属核素的金属纳米颗粒,其特征在于,所述放射性金属核素掺杂于所述金属纳米颗粒的晶格中和/或标记于所述金属纳米颗粒的晶格的表面。
- 根据权利要求1所述的含有放射性核素的金属纳米颗粒,其特征在于,所述放射性核素选自 68Ga、 177Lu、 198Au、 64Cu、 89Zr、 90Y、 89Sr的一种或几种。
- 根据权利要求1所述的含有放射性核素的金属纳米颗粒,其特征在于,所述金属纳米颗粒为含有金、银或铜的金属纳米颗粒。
- 根据权利要求4所述的含有放射性核素的金属纳米颗粒,其特征在于,所述金属纳米颗粒为金、银或铜的单一金属纳米颗粒。
- 根据权利要求4所述的含有放射性核素的金属纳米颗粒,其特征在于,所述金属纳米颗粒为混合金属纳米颗粒,所述混合金属纳米颗粒中包括金、银或铜中的至少两种。
- 根据权利要求4所述的含有放射性核素的金属纳米颗粒,其特征在于,所述金属纳米颗粒为含硫的金属纳米颗粒,所述含硫的金属纳米颗粒包含金、银或铜中的一种或多种金属;在所述含硫的金属纳米颗粒中,金属的重量含量大于硫的重量含量。
- 一种纳米材料,其特征在于,包括权利要求1至7任一权利要求所述的含有放射性核素的金属纳米颗粒,以及含有巯基基团的有机物。
- 根据权利要求8所述的纳米材料,其特征在于,所述的含有巯基基团的有机物包覆所述含有放射性核素的金属纳米颗粒。
- 根据权利要求8或9所述的纳米材料,其特征在于,所述含有巯基基团的有机物,其中巯基基团在有机物中的数量大于或等于1。
- 根据权利要求8或9所述的纳米材料,其特征在于,所述含有巯基基团的有机物包括小肽、氨基酸、脱氧核糖核酸、蛋白质、含有巯基基团的聚乙二醇或带有等量正、负电荷的两性化合物和烷基硫醇中的一种或几种。
- 根据权利要求11所述的纳米材料,其特征在于,所述小肽为含有半胱氨酸的小肽。
- 根据权利要求12所述的纳米材料,其特征在于,所述小肽包括谷胱甘肽、RGD肽和奥曲肽及其衍生物中的一种或多种。
- 权利要求8至13任一权利要求所述的纳米材料的制备方法,其特征在于,包括步骤:(1)、金、银或铜的水溶性金属盐中的至少一种、放射性核素盐与含有巯基基团的有机物于水中反应,得到反应溶液;(2)、调节步骤(1)获得的反应溶液的pH值至3~7.5;(3)、获得的反应溶液在25℃~120℃下反应;其中,若步骤(1)中加入金的水溶性金属盐,则进行步骤(2)后进行步骤(3);若步骤(1)中未加入金的水溶性金属盐,则在步骤(1)后直接进行步骤(3)。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述步骤(2)中,调节步骤(1)的反应溶液的pH值至6.5~7.5;所述步骤(3)中,步骤(2)获得的反应溶液在40℃~75℃下反应。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述步骤(2)中,将所述步骤(1)获得的反应溶液pH值调节为3-6.5;所述步骤(3)中,步骤(2)获得的反应溶液在75℃-120℃下反应。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述步骤(2)中的调节后的pH值越低,则步骤(3)中的反应温度越高。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述放射性核素盐为可溶于水的盐。
- 根据权利要求14所述的纳米材料的制备方法,其特征在于,所述放射性核素盐为放射性核素的盐酸盐和/或硝酸盐。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述步骤(2)中,使用可溶于水的碱或可溶于水的碳酸盐调节反应溶液的pH值。
- 根据权利要求20所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述可溶于水的碱包括氢氧化钾、氢氧化钠、氨水中的一种或几种;所述可溶于水的碳酸盐包括碳酸钾、碳酸氢钾、碳酸钠、碳酸氢钠中的一种或几种。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述水溶性金属盐与含有巯基基团的有机物的摩尔比为1:(1.5-3)。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,还包括步骤(4),将步骤(3)获得的溶液超滤,再使用磷酸盐缓冲溶液洗涤。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述含有巯基基团的有机物,其中巯基基团在有机物中的数量大于或等于1。
- 根据权利要求14或23所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述含有巯基基团的有机物选自小肽、氨基酸、脱氧核糖核酸、蛋白质、含有巯基基团的聚乙二醇或带有等量正、负电荷的两性化合物和烷基硫醇中的一种或几种。
- 根据权利要求25所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在 于,所述小肽为含有半胱氨酸的小肽。
- 根据权利要求26所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述小肽选自谷胱甘肽、RGD肽和奥曲肽及其衍生物中的一种或多种。
- 根据权利要求14所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,步骤(3)中还包括加入水溶性碱性硫化物。
- 根据权利要求28所述的含有放射性核素的金属纳米颗粒的制备方法,其特征在于,所述水溶性碱性硫化物为硫化铵、硫化钠或硫化钾。
- 权利要求8至13任一权利要求所述的纳米材料在制备靶向药物中的应用。
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| CN105754584A (zh) * | 2016-04-08 | 2016-07-13 | 苏州大学 | 金属硫族化合物多功能纳米探针的制备方法及其应用 |
| CN106975086A (zh) * | 2017-02-22 | 2017-07-25 | 北京万德高科技发展有限公司 | 一种磁共振/核医学双模态分子影像探针及其制备方法 |
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| CN105754584A (zh) * | 2016-04-08 | 2016-07-13 | 苏州大学 | 金属硫族化合物多功能纳米探针的制备方法及其应用 |
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