KR20200089158A - Method for preparing nanoparticle comprising drug - Google Patents

Abstract

The present invention relates to a method for preparing dug-containing nanoparticles, including the steps of: 1) preparing an oil phase solution including a drug and PLGA (poly(lactic-co-glycolic acid)); 2) preparing an aqueous phase solution including lecithin, 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-polyethylene glycol (DSPE-PEG) and DSPE-PEG to which a cancer cell targeting material is attached; and 3) mixing the oil phase solution prepared from step 1) with the aqueous phase solution prepared from step 2) to obtain nanoparticles. The method for preparing nanoparticles includes mixing DSPE-PEG with DSPE-PEG to which a cancer cell targeting material is attached at an optimized ratio, and thus can provide drug-containing nanoparticles having an excellent anticancer activity against cancer cells, while showing low toxicity to normal cells. Therefore, the nanoparticles can be used advantageously for a pharmaceutical composition for treating or preventing cancer.

Description

Method for preparing nanoparticles comprising drugs

The present invention relates to a method for producing nanoparticles containing a drug.

The drug delivery system using nanotechnology improves solubilization and absorption of drugs through small particles of nano-scale, improves the efficiency of drugs acting on diseased areas, and reduces side effects, so it can reduce many side effects, including anticancer drugs. It is applied to the development of soluble drugs. When delivered into a blood vessel, the nanoparticles are not removed by renal filtration or removed by the mononuclear phagocyte system (MPS) or reticuloendothelial system (RES), more efficiently. Can be delivered. Drug delivery systems to which such nanotechnology is applied include organic nanoparticles such as polymers and dendrimers, inorganic nanoparticles such as iron oxide or gold nanoparticles, fullerene or carbon nanotubes based on carbon, and liposomes, micelles, and the like. And nanoparticles made of the same phospholipid. For nanoparticles using polymers, biodegradable polymers are mainly used rather than non-biodegradable polymers. Among biodegradable polymers, PLGA (poly(lactic-co-glycolic acid), poly(lactic-co-glycolic acid)) is an FDA-approved material that is produced by non-enzymatic hydrolysis of ester main chains in the environment within the body. It is decomposed into lactic aicd and glycolic acid, and is used in various fields such as particles, pills, films, drug delivery, and tissue engineering.

Dolastatin is a peptide isolated from Dolabella auricularia in the Indian Ocean and is classified into dolastatin 10 and dolastatin 15. The bioactivity of dolastatin 10 is a tubulin inhibitor such as taxane and vinca alkaloid, but is a structurally different peptide (Chem. Ind., 1999, 51-55; Curr. Pharm. Des. , 1999, 5, 139-162). Dolastatin 10 has been shown to show strong anticancer activity against various human tumors in cell experiments and animal model experiments through preclinical studies.

An object of the present invention is to provide a method for producing nanoparticles containing a drug.

Another object of the present invention is to provide a nanoparticle containing a drug prepared by the above manufacturing method.

Another object of the present invention is to provide a pharmaceutical composition for preventing or treating cancer comprising nanoparticles containing a drug prepared by the above-described preparation method as an active ingredient.

In order to achieve the above object, the present invention provides a method for preparing nanoparticles comprising a drug comprising the following steps: 1) an oily solution comprising a drug and poly(lactic-co-glycolic acid) (PLGA) Preparing a; 2) preparing a water-phase solution comprising lecithin, DSPE-PEG (1,2-Distearoyl-sn-Glycero-3-Phosphoethanolamine-Polyethylene Glycol) and DSPE-PEG attached with a cancer cell target substance; And 3) mixing the oil phase solution prepared from step 1) and the water phase solution prepared from step 2) to obtain nanoparticles.

In addition, the present invention provides nanoparticles comprising a drug prepared by the above manufacturing method.

In addition, the present invention includes nanoparticles containing a drug prepared by the above-described preparation method as an active ingredient, and the drug provides 10 pharmaceuticals for preventing or treating cancer, dolastatin 10.

The method for preparing nanoparticles according to the present invention comprises a drug that exhibits excellent anticancer activity against cancer cells while being less toxic to normal cells by mixing DSPE-PEG and DSPE-PEG attached with a cancer cell target substance in an optimized ratio. Since nanoparticles can be prepared, it can be usefully used as a pharmaceutical composition for treating or preventing cancer.

1 is a result of measuring the cell viability of HEK293 cells and the cell inhibition rate of B16F10 cells according to the treatment concentration of free dolastatin 10.
2 is a flow chart showing a process for preparing nanoparticles containing dolastatin 10.
3 is a result of measuring the size (Particle size) and dispersion (PDI) of the nanoparticles according to the PLGA concentration.
4 is a result of measuring the zeta potential and scattering intensity (DCR) of nanoparticles according to the PLGA concentration.
Figure 5 is a result of measuring the size and dispersion of the nanoparticles according to the microfluidizer (microfludizer) pressure.
6 is a result of measuring the zeta potential and scattering intensity of the nanoparticles according to the microfludizer pressure.
7 is a diagram showing nanoparticles to which folate (FA) and RGD tripeptide, which are cancer cell target substances, are attached.
8 is a result of measuring the size and dispersion of nanoparticles according to the ratio of DSPE-PEG: DSPE-PEG (DSPE-PEG-FA) to which folate is attached.
9 is a result of measuring the zeta potential and scattering intensity of the nanoparticles according to the ratio of DSPE-PEG: DSPE-PEG (DSPE-PEG-FA) with folic acid attached.
10 is a result of measuring the size and dispersion of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which DSPE-PEG:RGD tripeptide is attached.
FIG. 11 shows the results of measuring the zeta potential and scattering intensity of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which DSPE-PEG:RGD tripeptide is attached.
12 is a result of measuring the size and dispersion of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-FA) with DSPE-PEG:folic acid attached to dolastatin 10.
13 is a result of measuring the zeta potential and scattering intensity of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-FA) with DSPE-PEG:folic acid attached to dolastatin 10.
14 is a result of measuring the size and dispersion of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which dolastatin 10 is attached and DSPE-PEG:RGD tripeptide is attached.
15 is a result of measuring the zeta potential and scattering intensity of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which DSPE-PEG:RGD tripeptide is contained and contains dolastatin 10.
16 is a result of measuring the cell viability of HEK293 cells of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-FA) with DSPE-PEG:folate attached with dolastatin 10:
-FA 60:0: DSPE-PEG: The ratio of DSPE-PEG (DSPE-PEG-FA) with folic acid attached is 60:0;
-FA 50:10: The ratio of DSPE-PEG:DSPE-PEG-FA is 50:10;
-FA 48:12: The ratio of DSPE-PEG:DSPE-PEG-FA is 48:12;
FA 45:15: The ratio of DSPE-PEG:DSPE-PEG-FA is 45:15;
-FA 40:20: The ratio of DSPE-PEG:DSPE-PEG-FA is 40:20.
17 is a result of measuring the cell inhibition rate of B16F10 skin cancer cells of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-FA) with DSPE-PEG:folate attached with dolastatin 10:
-FA 60:0: DSPE-PEG: The ratio of DSPE-PEG (DSPE-PEG-FA) with folic acid attached is 60:0;
-FA 50:10: The ratio of DSPE-PEG:DSPE-PEG-FA is 50:10;
-FA 48:12: The ratio of DSPE-PEG:DSPE-PEG-FA is 48:12;
FA 45:15: The ratio of DSPE-PEG:DSPE-PEG-FA is 45:15;
-FA 40:20: The ratio of DSPE-PEG:DSPE-PEG-FA is 40:20.
18 is a result of measuring the selectivity of nanoparticles to cancer cells according to the ratio of DSPE-PEG (DSPE-PEG-FA) with DSPE-PEG:folic acid attached to dolastatin 10:
-FA 60:0: DSPE-PEG: The ratio of DSPE-PEG (DSPE-PEG-FA) with folic acid attached is 60:0;
-FA 50:10: The ratio of DSPE-PEG:DSPE-PEG-FA is 50:10;
-FA 48:12: The ratio of DSPE-PEG:DSPE-PEG-FA is 48:12;
FA 45:15: The ratio of DSPE-PEG:DSPE-PEG-FA is 45:15;
-FA 40:20: The ratio of DSPE-PEG:DSPE-PEG-FA is 40:20.
19 is a result of measuring the cell viability of the nanoparticles for HEK293 cells according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which DSPE-PEG:RGD tripeptide is contained and contains dolastatin 10:
-RGD 60:0: The ratio of DSPE-PEG (DSPE-PEG-RGD) to which the DSPE-PEG:RGD tripeptide is attached is 60:0;
-RGD 50:10: The ratio of DSPE-PEG:DSPE-PEG-RGD is 50:10;
-RGD 48:12: The ratio of DSPE-PEG:DSPE-PEG-RGD is 48:12;
-RGD 45:15: The ratio of DSPE-PEG:DSPE-PEG-RGD is 45:15;
-RGD 40:20: The ratio of DSPE-PEG:DSPE-PEG-RGD is 40:20.
20 is a result of measuring the cell inhibition rate of B16F10 skin cancer cells of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which DSPE-PEG:RGD tripeptide is contained and contains dolastatin 10:
-RGD 60:0: The ratio of DSPE-PEG (DSPE-PEG-RGD) to which the DSPE-PEG:RGD tripeptide is attached is 60:0;
-RGD 50:10: The ratio of DSPE-PEG:DSPE-PEG-RGD is 50:10;
-RGD 48:12: The ratio of DSPE-PEG:DSPE-PEG-RGD is 48:12;
-RGD 45:15: The ratio of DSPE-PEG:DSPE-PEG-RGD is 45:15;
-RGD 40:20: The ratio of DSPE-PEG:DSPE-PEG-RGD is 40:20.
FIG. 21 shows the results of measuring selectivity to cancer cells of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which DSPE-PEG:RGD tripeptide is contained and contains dolastatin 10:
-RGD 60:0: The ratio of DSPE-PEG (DSPE-PEG-RGD) to which the DSPE-PEG:RGD tripeptide is attached is 60:0;
-RGD 50:10: The ratio of DSPE-PEG:DSPE-PEG-RGD is 50:10;
-RGD 48:12: The ratio of DSPE-PEG:DSPE-PEG-RGD is 48:12;
-RGD 45:15: The ratio of DSPE-PEG:DSPE-PEG-RGD is 45:15;
-RGD 40:20: The ratio of DSPE-PEG:DSPE-PEG-RGD is 40:20.
Figure 22 shows the collection efficiency of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-FA) with DSPE-PEG:folic acid attached to dolastatin 10.
23 shows the collection efficiency of nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-RGD) to which DSPE-PEG:RGD tripeptide is attached.
FIG. 24 shows the efficiency of containing nanoparticles according to the ratio of DSPE-PEG (DSPE-PEG-FA or DSPE-PEG-RGD) containing dolastatin 10 and attached to a cancer cell target material:
-DSPE-PEG: nanoparticles without cancer cell targets attached;
-FA 40:20: DSPE-PEG: nanoparticles with a mixing ratio of 40:20 of DSPE-PEG (DSPE-PEG-FA) with folic acid attached;
-RGD 45:15: Nanoparticles with a mixing ratio of DSPE-PEG (DSPE-PEG-RGD) with DSPE-PEG:RGD tripeptide attached at 45:15.
FIG. 25 is a photomicrograph confirming the cell permeation of nanoparticles comprising dolastatin 10 and DSPE-PEG attached to a cancer cell target material:
-DSPE-PEG: nanoparticles to which cancer cell target material is not attached;
-DSPE-PEG-RGD (45:15): Nanoparticles in which the mixing ratio of DSPE-PEG (DSPE-PEG-RGD) with DSPE-PEG:tripeptide is 45:15.
-DSPE-PEG-FA (40:20): DSPE-PEG: Nanoparticles with a mixing ratio of DSPE-PEG (DSPE-PEG-FA) with folic acid attached at 45:15.
26 is a result of quantifying the degree of cell permeation of nanoparticles containing DSPE-PEG to which dolastatin 10 is attached and a cancer cell target substance is attached:
-DSPE-PEG-NH2: nanoparticles without cancer cell targets attached;
-FA 40:20: DSPE-PEG: nanoparticles with a mixing ratio of 40:20 of DSPE-PEG (DSPE-PEG-FA) with folic acid attached;
-RGD 45:15: Nanoparticles with a mixing ratio of DSPE-PEG (DSPE-PEG-RGD) with DSPE-PEG:RGD tripeptide attached at 45:15.

Hereinafter, the present invention will be described in detail.

The present invention provides a method for producing nanoparticles comprising a drug comprising the following steps: 1) preparing an oily solution comprising a drug and poly(lactic-co-glycolic acid) (PLGA); 2) preparing a water-phase solution comprising lecithin, DSPE-PEG (1,2-Distearoyl-sn-Glycero-3-Phosphoethanolamine-Polyethylene Glycol) and DSPE-PEG attached with a cancer cell target substance; And 3) mixing the oil phase solution prepared from step 1) and the water phase solution prepared from step 2) to obtain nanoparticles.

The molecular weight of PLGA in step 1) may be 5,000 to 15,000, but is not limited thereto. Specifically, according to an embodiment of the present invention, PLGA may be Resomer® RG 502 H (719897 CAS Number: 26780-50-7) purchased from Sigma-Aldrich.

Lecithin of step 2) may be a compound represented by the following formula (1), specifically, the molecular weight of the lecithin may be 300 to 800. In the following Chemical Formula 1, R or R'may be fatty acid residues such that the molecular weight of lecithin is in the range of 300 to 800.

DSPE-PEG (1,2-Distearoyl-sn-Glycero-3-Phosphoethanolamine-Polyethylene Glycol) of step 2) may be a compound represented by the following Chemical Formula 2, n of the Chemical Formula 2 may be 41 to 50 have. Specifically, n in the following Chemical Formula 2 may be adjusted such that the molecular weight of DSPE-PEG is in the range of 1,500 to 2,500.

The cancer cell target material of step 2) includes folate, RGD tripeptide consisting of the amino acid sequence of Arg-Gly-Asp, NGR tripeptide consisting of the amino acid sequence of Asn-Gly-Arg, and transferrin. It may be any one or more selected from the group consisting of, but is not limited thereto. Specifically, the cancer cell target material may be folate or RGD tripeptide consisting of the amino acid sequence of Arg-Gly-Asp. The folic acid can bind to the folate receptor on the surface of cancer cells, and the RGD tripeptide can bind to the αvβ3 integrin receptor overexpressed in tumor cells. Specifically, DSPE-PEG attached to folic acid, a cancer cell target material, may be a compound represented by the following Chemical Formula 3, and DSPE-PEG attached to an RGD tripeptide may be a compound represented by the following Chemical Formula 4.

In the above method, the cancer cell target material of step 2) is folic acid, and DSPE-PEG of step 2) and DSPE-PEG with folic acid attached may be mixed in a ratio of 1 to 2.8:1, specifically It may be mixed in a ratio of 1.5 to 2.5:1. In addition, the cancer cell target material in step 2) is an RGD tripeptide consisting of the amino acid sequence of Arg-Gly-Asp, and the DSPE-PEG and DSPE-PEG attached to the RGD tripeptide in step 2) are 2.2 to 3.8:1. It may be mixed in a ratio of, specifically, may be mixed in a ratio of 2.5 to 3.5:1. The nanoparticles prepared in the above range of ratio conditions can exhibit excellent anti-cancer activity against cancer cells while showing little toxicity to normal cells.

In the method of manufacturing the nanoparticles, the drug may be dolastatin 10, but is not limited thereto as long as it can be included in the nanoparticles prepared by the method.

The concentration of PLGA in step 1) may be 3.5 to 9 mg/ml, specifically 5 to 8 mg/ml. In the range of the concentration conditions of the PLGA, nanoparticles exhibiting a uniform and stable particle distribution can be obtained.

The size of the nanoparticles containing dolastatin 10 prepared according to the present invention may be 80 to 110 nm. In the range of the size conditions of the nanoparticles, the loading rate of the drug is excellent and it is possible to easily penetrate cancer cells.

In the method of manufacturing the nanoparticles, the step of mixing the oily solution and the aqueous solution of step 3) may further include the step of treating ultrasound. Specifically, the ultrasonic treatment may be performed for 5 to 25 minutes, and more specifically, for 10 to 20 minutes. In addition, in the method of manufacturing the nanoparticles, the step of mixing the oil phase solution and the aqueous solution of step 3) may further include the step of nanoscopy with a ultrasonicizer and ultrasonic treatment. Specifically, the pressure of the microfluidizer may be 5,000 to 15,000 psi, specifically 8,000 to 12,000 psi. In the range of the pressure condition of the microfluidizer, small and stable nanoparticles can be obtained.

In the method of manufacturing the nanoparticles, the method may further include the step of treating and diluting ultrasonic waves after mixing the oil phase solution and the water phase solution of step 3). The diluting step may be to dilute so that the final concentration of dolastatin 10 is 10 to 90 ng/ml, specifically 20 to 80 ng/ml. Dolastatin 10 in the concentration range may exhibit excellent anti-cancer activity against cancer cells with little toxicity to normal cells. In one embodiment of the present invention, 200 μg/ml of dolastatin 10 stock solution is added to a PLGA oil solution at a concentration of 20/3 mg/ml, and mixed with an aqueous solution to form nano containing dolastatin 10 After preparing the particles, the collection efficiency of dolastatin 10 in the prepared nanoparticles was measured, and the concentration of dolastatin 10 was diluted to 25, 50, and 75 ng/ml. The nanoparticles prepared in the range of the concentration condition of dolastatin 10 may exhibit excellent anti-cancer activity against cancer cells with little toxicity to normal cells.

In a specific embodiment of the present invention, the present inventors measured the cytotoxicity and anticancer activity of free dolastatin 10 itself, and as a result, exhibited excellent anticancer activity against skin cancer cells while having less cytotoxicity against normal cells. Determining the content of dolastatin 10 (75 ng/ml or less) (see FIG. 1), and observing the properties of the nanoparticles prepared according to the PLGA concentration, it has a small nanoparticle size, uniform particle distribution and stable particles The content of PLGA (6.67 mg/ml) that could be characterized was determined (see Figures 3 and 4).

In addition, the present inventors adjusted the ratio of DSPE-PEG to which DSPE-PEG and cancer cell target material (folic acid and/or RGD tripeptide) are attached when preparing nanoparticles, and the nanoparticles of the present invention are small regardless of the ratio. While maintaining the size, it was confirmed that it exhibits uniform particle distribution and stable particle characteristics (see FIGS. 7 to 11 ).

In addition, the present inventors adjusted the ratio of DSPE-PEG to which the DSPE-PEG and cancer cell target material (folic acid or RGD tripeptide) were attached when preparing the nanoparticles of the present invention, DSPE-PEG: DSPE- attached to folic acid When the ratio of PEG (DSPE-PEG-FA) is 40:20 and the ratio of DSPE-PEG (DSPE-PEG-RGD) with DSPE-PEG:RGD tripeptide is 45:15, normal cells It was confirmed that it has excellent anti-cancer activity against skin cancer cells while being less toxic and is absorbed into the cells (see FIGS. 12 to 21, 25 and 26).

Therefore, the nanoparticles produced by the production method of the present invention can be usefully used as a composition for preventing or treating cancer.

In addition, the present invention provides nanoparticles comprising a drug prepared by the method of the present invention.

The nanoparticles can be prepared according to the method as described above. In one embodiment of the present invention, the nanoparticles containing the drug comprises: 1) preparing an oil phase solution containing the drug and poly(lactic-co-glycolic acid) (PLGA); 2) preparing a water-phase solution comprising lecithin, DSPE-PEG (1,2-Distearoyl-sn-Glycero-3-Phosphoethanolamine-Polyethylene Glycol) and DSPE-PEG attached with a cancer cell target substance; And 3) mixing the oil phase solution prepared from step 1) and the water phase solution prepared from step 2) to obtain nanoparticles.

In the manufacturing method of the nanoparticles, drugs, PLGA, lecithin, DSPE-PEG and cancer cell target substances are as described above. Specifically, the cancer cell target material is composed of folate, RGD tripeptide consisting of the amino acid sequence of Arg-Gly-Asp, NGR tripeptide consisting of the amino acid sequence of Asn-Gly-Arg, and transferrin. It may be any one or more selected from the group, but is not limited thereto. More specifically, the cancer cell target material may be folate or RGD tripeptide consisting of the amino acid sequence of Arg-Gly-Asp.

In the preparation of the nanoparticles, the DSPE-PEG and DSPE-PEG with folic acid attached may be mixed in a ratio of 1 to 2.8:1, specifically 1.5 to 2.5:1. In addition, the DSPE-PEG and the DSPE-PEG to which the RGD tripeptide is attached may be mixed in a ratio of 2.2 to 3.8:1, and specifically 2.5 to 3.5:1. The nanoparticles prepared in the above range of ratio conditions can exhibit excellent anti-cancer activity while exhibiting little toxicity to normal cells.

In the method of manufacturing the nanoparticles, the drug may be dolastatin 10, but is not limited thereto as long as it can be included in the nanoparticles prepared by the method.

The concentration of PLGA in step 1) may be 3.5 to 9 mg/ml, specifically 5 to 8 mg/ml. In the range of the concentration conditions of the PLGA, nanoparticles exhibiting a uniform and stable particle distribution can be obtained.

The size of the nanoparticles containing dolastatin 10 prepared according to the present invention may be 80 to 110 nm. In the range of the size conditions of the nanoparticles, the loading rate of the drug is excellent and it is possible to easily penetrate cancer cells.

In the method of manufacturing the nanoparticles, the step of mixing the oily solution and the aqueous solution of step 3) may further include the step of treating ultrasound. Specifically, the ultrasonic treatment may be performed for 5 to 25 minutes, and more specifically, for 10 to 20 minutes. In addition, in the method of manufacturing the nanoparticles, the step of mixing the oil phase solution and the aqueous solution of step 3) may further include the step of nanoscopy with a ultrasonicizer and ultrasonic treatment. Specifically, the pressure of the microfluidizer may be 5,000 to 15,000 psi, specifically 8,000 to 12,000 psi. In the range of the pressure condition of the microfluidizer, small and stable nanoparticles can be obtained.

In the method of manufacturing the nanoparticles, the method may further include the step of treating and diluting ultrasonic waves after mixing the oil phase solution and the water phase solution of step 3). The diluting step may be to dilute so that the final concentration of dolastatin 10 is 10 to 90 ng/ml, specifically 20 to 80 ng/ml. Dolastatin 10 in the concentration range may exhibit excellent anti-cancer activity against cancer cells with little toxicity to normal cells. In one embodiment of the present invention, 200 μg/ml of dolastatin 10 stock solution is added to a PLGA oil solution at a concentration of 20/3 mg/ml, and mixed with an aqueous solution to form nano containing dolastatin 10 After preparing the particles, the collection efficiency of dolastatin 10 in the prepared nanoparticles was measured, and the concentration of dolastatin 10 was diluted to 25, 50, and 75 ng/ml.

In addition, the present invention includes the nanoparticles prepared by the production method of the present invention as an active ingredient, the drug is dolastatin 10, provides a pharmaceutical composition for preventing or treating cancer.

The nanoparticles can be prepared according to the method as described above.

The cancer may be skin cancer, colorectal cancer, lung cancer, breast cancer, stomach cancer, cervical cancer, bladder cancer or blood cancer, but is not limited thereto as long as it is a kind of cancer that can be treated with dolastatin 10.

The pharmaceutical composition according to the present invention may contain 10 to 95% by weight of nanoparticles as an active ingredient relative to the total weight of the composition. In addition, the pharmaceutical composition of the present invention may further include one or more active ingredients exhibiting the same or similar function in addition to the active ingredients.

The pharmaceutical composition of the present invention may include a carrier, diluent, excipient, or mixture thereof conventionally used in biological agents. Any pharmaceutically acceptable carrier can be used as long as it is suitable for delivering the composition in vivo. Specifically, the carrier is Merck Index, 13th ed., Merck & Co. Inc., a saline solution, sterile water, Ringer's solution, dextrose solution, maltodextrin solution, glycerol, ethanol, or a mixture thereof. In addition, conventional additives such as antioxidants, buffers, bacteriostatic agents and the like can be added as necessary.

When formulating the composition, diluents or excipients such as fillers, extenders, binders, wetting agents, disintegrating agents, surfactants, etc., which are usually used may be added.

The composition of the present invention may be formulated as an oral preparation or parenteral preparation. Oral formulations may include solid and liquid formulations. The solid preparation may be a tablet, pill, powder, granule, capsule or troche, and the solid preparation may be prepared by adding at least one excipient to the composition. The excipient may be starch, calcium carbonate, sucrose, lactose, gelatin or a mixture thereof. In addition, the solid formulation may include a lubricant, for example, magnesium stearate, talc, and the like. Meanwhile, the liquid formulation may be a suspending agent, an intravenous solution, an emulsion, or a syrup. At this time, the liquid formulation may include excipients such as wetting agents, sweeteners, fragrances, preservatives.

The parenteral preparation may include injections, suppositories, respiratory inhalation powders, spray aerosols, powders and creams. The injection may include a sterilized aqueous solution, a non-aqueous solvent, a suspension solvent, an emulsion, and the like. At this time, as a non-aqueous solvent or a suspension solvent, vegetable oils such as propylene glycol, polyethylene glycol, and olive oil, or injectable esters such as ethyl oleate may be used.

The composition of the present invention may be administered orally or parenterally depending on the desired method. Parenteral administration can include intraperitoneal, rectal, subcutaneous, intravenous, intramuscular or intrathoracic injection.

The composition can be administered in a pharmaceutically effective amount. This may vary depending on the type of disease, severity, drug activity, patient sensitivity to the drug, administration time, route of administration, duration of treatment, and drugs used simultaneously. However, for a desired effect, the amount of active ingredient contained in the pharmaceutical composition according to the present invention may be 0.0001 to 1,000 mg/kg, specifically 0.001 to 500 mg/kg. The administration can be several times a day.

The composition of the present invention may be administered alone or in combination with other therapeutic agents. In combination administration, administration can be sequential or simultaneous.

Hereinafter, the present invention will be described in detail by examples.

However, the following examples are merely illustrative of the present invention, and the contents of the present invention are not limited by the following examples.

< Example 1> In nanoparticles Dolastatin Determination of concentration of 10

To determine the concentration of dolastatin 10 to be loaded into poly(lactic-co-glycolic acid), poly(lactic-co-glycolic acid) (PLGA) nanoparticles, free dolastatin 10 in kidney-derived HEK293 cells Cytotoxicity was measured, and anti-cancer activity of free dolastatin 10 in skin cancer cells B16F10 cells was measured.

<1-1> Cellular Passage culture

HEK293 cells obtained from the Korean Cell Line Bank were inoculated into Dulbecco's Modified Eagle Medium (DMEM) medium supplemented with 1% penicillin-streptomycin and 10% inactivated FBS, and the Korean Cell Line Bank. The obtained B16F10 cells were inoculated in MEM (Minimum Essential Medium) to which 1% penicillin-streptomycin and 10% inactivated FBS were added, and then cultured in an incubator at 37°C, 5% CO ₂ and 95% humidity. . When the confluency of each cell reached 75 to 80%, the medium was removed, and the cells were washed with phosphate buffered saline (PBS). Attached cells were treated with 0.25% trypsin-EDTA, and the cells were each collected and centrifuged at 1,000 rpm for 3 minutes to obtain cell pellets. 3-4 ml of medium was added to the cell pellet from which the supernatant was removed, resuspended, and then dispensed into a 75 cm ² T-flask. After 48 hours of incubation, the cells were replaced with fresh medium and suspended cells not attached to the flask surface were removed.

<1-2> Cytotoxicity to normal cells

HEK293 cells cultured according to Example 1-1 were diluted to a concentration of 5.5×10 ⁴ cells/mL, and cultured by dispensing 180 μL in 96-well plates. After 24 hours, the cultured cells were treated with free dolastatin 10 by concentration (0 to 250 ng/ml) and incubated for 24 hours, followed by treatment with MTT reagent. After 4 hours, the supernatant was removed by centrifugation at 1,500 rpm for 5 minutes, and DMSO was treated to solubilize formazan, and absorbance was measured at 540 nm. Cell viability was calculated compared to the control group not treated with dolastatin 10.

Dolastatin 10, when treated with 100 ng/ml, showed a cell viability of 69%, and showed cytotoxicity in a concentration-dependent manner (FIG. 1 ).

<1-3> Anti-cancer activity against cancer cells

Absorbance was measured in the same manner as in Example 1-2, except that B16F10 cells were used instead of HEK293 cells. The cell inhibition rate was calculated compared to the control group not treated with dolastatin 10.

Dolastatin 10, when treated with 75 ng/ml, exhibited a skin cancer cell inhibition rate of about 25% and was confirmed to be able to inhibit cell proliferation depending on concentration. Synthesizing with the results of Examples 1-2, it was determined that the final concentration of dolastatin 10 of PLGA nanoparticles was 75 ng/ml or less with relatively low cytotoxicity and high anticancer activity (FIG. 1).

< Example 2> Dolastatin Preparation of nanoparticles containing 10

In the manufacture of nanoparticles containing dolastatin 10, the properties of the nanoparticles according to the PLE content, microfluidizer pressure, folate and RGD (Arg-Gly-Asp) tripeptide attached DSPE-PEG content Was analyzed.

<2-1> PLGA Analysis of nanoparticle characteristics according to content

<2-1-1> PLGA Preparation of various nanoparticles with different contents

Poly(lactic-co-glycolic acid) (PLGA), lecithin and DSPE-PEG (1,2-Distearoyl-sn-Glycero-3-Phosphoethanolamine-Polyethylene Glycol) to prepare nanoparticles containing dolastatin 10 ) Was used as the base coating material (FIG. 7 ).

First, oil solution and lecithin (Lecithin from soybean, CAS NO.8002-43-5 5081-4405, Daejung (DAEJUNG) dissolving PLGA (Resomer®RG 502 H, 719897 CAS Number: 26780-50-7, Sigma Aldrich) )) and DSPE-PEG (DSPE-PEG-NH ₂ , DSPE-PEG-Amine CatalogID: 10455 Cat.No LP096005-2K, Biochempeg scientific inc.) were prepared. Specifically, PLGA 1, 10, 20 or 30 mg was dissolved in 3 ml of acetonitrile to prepare an oil phase solution, and 9 mg of lecithin was added to 4% ethanol and stirred (700 rpm) at 65° C. for sufficient After dissolution, 6 mg of DSPE-PEG was added to prepare a water phase solution.

For the preparation of the nanoemulsion, 3 ml of an oil-phase solution and 10 ml of an aqueous-phase solution were mixed and reacted for 10 minutes, followed by ultrasonic treatment for 15 minutes in a low-temperature water bath (30% of amplitude, 2 minutes after 30 seconds of ultrasonic treatment). VC 505, Vibracell Sonics, Newton, USA). Immediately after sonication, nanofluidize using a microfluidizer (LM20 Microfluidizer High shear fluid processor, Microfluidicscorp, USA), stabilize for 2 hours at room temperature by stirring (600 rpm), and then stir at 65°C for 45 minutes (600 rpm) ) To remove the organic solvent. In order to remove non-captured materials from the prepared emulsion solution and to screen nanoparticles, they were placed in Amicon Ultra-15 (10K, Millipore Co., MA, USA) and centrifuged (2,486 g force, 15 minutes, 25°C). . After washing the separated nanoparticles twice with distilled water, distilled water was added to make the final volume 13 ml (FIG. 2).

<2-1-2> PLGA Analysis of nanoparticle characteristics according to content

The particle properties of each nanoparticle prepared in Example 2-1-1 above with different PLGA content added during nanoparticle production were analyzed. The characteristics of the nanoparticles are nanoparticle size (particle size), particle dispersity (polydispersity index, PDI), and scattering intensity using a nanoparticle size analyzer (Zetasizer Nano ZS, Malvern Instruments, Ltd., Malvern, Worcestershire, UK). (derived count rate, DCR) and zeta potential.

As a result of confirming the characteristics of each particle, the particle size was in the range of 112 to 136 nm, and there was no significant difference according to the PLGA content. PDI, which shows the degree of dispersion of the particle size, is judged to show a uniform particle distribution as it is lowered based on 0.3. All particles showed stable values of 0.3 or less, and there was no significant difference according to the PLGA content. The zeta potential is a value representing the electric charge of the electrical double layer on the surface of the nanoparticle, and is generally determined to be stable as the absolute value is larger based on the absolute value of 30 mV. The zeta potential of the prepared nanoparticles showed a tendency to decrease in absolute value as the PLGA content increased, but it was confirmed that all the particles showed high values of 45 mV or higher in absolute value to form stable particles. In addition, all particles exhibited a negative charge, which is presumed to be due to the carboxyl group of PLGA. The scattering intensity (DCR) of the nanoparticles is a value indicating the intensity of light scattered from the nanoparticles, and is influenced by the number and size of the manufactured nanoparticles. The scattering intensity of the nanoparticles is significantly different according to the PLGA content. Appeared to be missing.

Finally, 6.67 (20/3) mg/ml showing a uniform particle distribution and stable zeta potential with relatively small nanoparticle size of 115 nm was determined as the optimal PLGA concentration (Tables 1, 3 and 4).

PLGA
(Mg/ml) Particle size
(nm) PDI Zeta potential
(mV) DCR
(kcps) 1/3 128.7±39.6 0.282±0.045 -72.4±1.1 78,489±10,505 10/3 136.2±40.2 0.275±0.036 -60.0±5.6 92,753±8,854 20/3 114.7±8.0 0.299±0.075 -46.8±2.9 81,698±6,100 30/3 111.8±17.3 0.285±0.026 -44.7±1.7 87,221±3,820

<2-2> Microfluidizer Analysis of nanoparticle characteristics according to pressure

Nanoparticles were prepared in the same manner as in Example 2-1-1, except that an oil phase solution was prepared with PLGA at a concentration of 20/3 mg/ml, and the pressure of the microfluidizer was applied at 10,000, 20,000, or 30,000 psi during the nanonization process. Was prepared.

As a result of analyzing the properties of the nanoparticles prepared according to the pressure of the microfluidizer, the size of the nanoparticles showed a tendency to increase significantly as the pressure increased, and the PDI and zeta potentials were 0.2 or less and an absolute value of 30, respectively. It showed stable value over mV and there was no significant difference according to pressure. The scattering intensity (DCR) tended to increase with increasing pressure, presumably due to the increased particle size.

From the above, the optimum pressure of the microfluidizer was determined to be 10,000 psi capable of forming small-sized nanoparticles of 70 nm (Tables 2, 5 and 6).

Micro
Fluidizer pressure
(psi) Particle size
(nm) PDI Zeta potential
(mV) DCR
(kcps) 10,000 70.8±1.6 0.161±0.003 -60.5±0.4 71,306±18,754 20,000 73.2±0.5 0.164±0.003 -74.1±20.8 82,748±16,045 30,000 76.5±1.1 0.163±0.009 -70.9±21.5 84,574±21,363

< Example 2-3> Cancer cell target substance attached DSPE -PEG-FA or DSPE -PEG- RGD Analysis of nanoparticle characteristics according to content

DSPE with RGD (Arg-Gly-Asp) tripeptide attached to folate (FA) capable of binding to the folate receptor expressed on the surface of cancer cells, or αvβ3 integrin receptor overexpressed in cancer cells Nanoparticles were prepared by varying the content of -PEG (FIG. 7).

<2-3-1> Folic acid attached DSPE -Production and Characterization of Nanoparticles with Different PEG Contents

An oil phase solution was prepared with PLGA at a concentration of 20/3 mg/ml, and DSPE-PEG:DSPE-PEG-FA (DSPE-PEG-Folic Acid CatalogID: 10462 Cat.No LP096057-2K, Biochempeg scientific inc. ) Is added by adjusting the ratio of 60:0, 50:10, 48:12, 45:15 or 40:20, except that a microfluidizer pressure of 10,000 psi is applied during the nanonization process. Nanoparticles were prepared in the same manner as in 1-1.

As a result of analyzing the properties of the nanoparticles prepared by adjusting the proportion of DSPE-PEG with folic acid attached, the size of the nanoparticles increased significantly as the proportion of DSPE-PEG-FA added increased, but 71 to 77 nm Relatively small size was maintained in the range of. The PDI showed a uniform particle distribution of about 0.2, and the zeta potential did not show a significant difference according to the DSPE-PEG-FA ratio condition, and showed a stable particle state. The scattering intensity showed a significant decrease as the DSPE-PEG-FA ratio increased, but did not show a clear tendency (Table 3, FIGS. 8 and 9).

DSPE-PEG-NH ₂ :
DSPE-PEG-FA Particle size
(nm) PDI Zeta potential
(mV) DCR
(kcps) 60:0 70.8±1.6 0.161±0.003 -60.5±3.1 59,003±4,224 50:10 77.3±1.3 0.218±0.028 -66.8±3.3 35,597±6,433 48:12 74.9±2.3 0.167±0.013 -68.5±3.6 41,109±542 45:15 75.2±4.7 0.206±0.016 -65.2±1.0 27,663±4,210 40:20 77.1±2.6 0.214±0.029 -60.4±2.2 39,253±1,407

<2-3-2> RGD Tripeptide DSPE -Production and Characterization of Nanoparticles with Different PEG Contents

Prepare oil phase solution with PLGA at a concentration of 20/3 mg/ml, and DSPE-PEG:DSPE-PEG-RGD(DSPE-PEG-ARG-GLY-ASP CatalogID: 11188 Cat.No LP096074-2K, Biochempeg scientific inc.) is added by adjusting the ratio of 60:0, 50:10, 48:12, 45:15 or 40:20, except for applying a microfluidizer pressure of 10,000 psi during the nanonization process. Nanoparticles were prepared in the same manner as in Example 2-1-1.

As a result of analyzing the properties of the nanoparticles prepared by adjusting the ratio of DSPE-PEG with RGD attached, the size of the nanoparticles differed somewhat depending on the proportion of DSEP-PEG-RGD added, but in the range of 67 to 76 nm overall The size of was maintained. The PDI showed a uniform particle distribution of 0.3 or less, and the zeta potential also showed a stable value of 43 mV or more. The scattering intensity shows a tendency to decrease as the DSPE-PEG-RGD ratio increases, and it is estimated that the number of particles formed decreases (Table 4, FIGS. 10 and 11).

DSPE-PEG-NH ₂ :
DSPE-PEG-RGD Particle size
(nm) PDI Zeta potential
(mV) DCR
(kcps) 60:0 70.8±1.6 0.161±0.003 -60.5±3.1 59,003±4,224 50:10 73.2±7.2 0.189±0.018 -42.8±2.4 22,537±506 48:12 75.9±7.0 0.224±0.005 -57.4±4.4 13,766±136 45:15 66.9±4.2 0.174±0.011 -44.1±3.9 32,768±91 40:20 75.2±4.7 0.260±0.024 -55.0±4.3 11,711±224

From the above results, the mixing ratio of DSPE-PEG-FA and DSPE-PEG-RGD did not show a distinct change in nanoparticle properties. Under all conditions, a particle size of about 80 nm or less and a uniform particle distribution of PDI 0.3 or less were exhibited, and the zeta potential also exhibited stable particle characteristics with an absolute value of 30 mV or more.

< Example 3> Dolastatin Preparation of nanoparticles containing 10

<3-1> FA is attached DSPE -PEG and Dolastatin Preparation of nanoparticles including 10

Specifically, dolastatin 10 trifluoroacetate (dolastatin-10 trifluoroacetate, Cat.No. 3375, TOCRIS) was added to 100% acetonitrile to prepare a 200 μg/ml stock solution, which was 20/3 It was added to the PLGA oil solution at a concentration of mg/ml. Nanoparticles containing dolastatin 10 were prepared in the same manner as in Example 2-3-1 except for this process.

As a result, the size of the nanoparticles containing dolastatin 10 is generally in the range of 88 to 101 nm in all DSPE-PEG-FA ratio conditions, nanoparticles not containing dolastatin 10 (Example 2-3-1 ), an increase of about 20 nm was observed. The PDI and zeta potentials were not significantly different according to the DSPE-PEG-FA ratio, and all the DSPE-PEG-FA ratios showed stable particle characteristics of PCI 0.3 or less and zeta potential of 30 or more. The scattering intensity showed a tendency to increase significantly as the DSPE-PEG-FA ratio increased (Table 5, Figures 12 and 13).

DSPE-PEG-NH ₂ :
DSPE-PEG-FA Particle size
(nm) PDI Zeta potential
(mV) DCR
(kcps) 60:0 87.5±2.3 0.184±0.002 -96±11 70,728±5,583 50:10 96.8±2.4 0.203±0.010 -78±23 78,750±13,339 48:12 95.4±10.6 0.189±0.027 -78±22 85,790±22,191 45:15 101.1±3.9 0.188±0.014 -92±8 122,220±24,682 40:20 99.5±2.6 0.185±0.020 -86±10 112,882±44,468

<3-2> RGD Attached DSPE -PEG and Dolastatin Preparation of nanoparticles including 10

Nanoparticles including DSPE-PEG and dolastatin 10 with RDG were prepared in the same manner as in Example 3-1, except that DSPE-PEG-RDG was used instead of DSPE-PEG-FA.

As a result, the size of the nanoparticles containing dolastatin 10 is generally in the range of 88 to 99 nm in all DSPE-PEG-RGD ratio conditions, nanoparticles not containing dolastatin 10 (Example 2-3-2 ) Compared to about 20 nm. PDI showed a tendency to increase significantly according to the DSPE-PEG-RGD ratio, but showed stable values below PDI 0.3 under all conditions. The zeta potential did not show a clear trend according to the DSPE-PEG-RGD ratio, but showed stable interest characteristics with an absolute value of 30 or more. The scattering intensity also showed no obvious trend according to the DSPE-PEG-RGD ratio (Table 6, FIGS. 14 and 15).

DSPE-PEG-NH ₂ :
DSPE-PEG-FA Particle size
(nm) PDI Zeta potential
(mV) DCR
(kcps) 60:0 87.5±2.3 0.184±0.002 -96±11 70,728±5,583 50:10 96.2±0.0 0.190±0.029 -83±12 75,359±13,311 48:12 97.0±2.5 0.204±0.008 -90±13 65,944±7,097 45:15 98.7±6.1 0.211±0.005 -92±5 64,727±7,220 40:20 97.8±9.1 0.230±0.011 -81±11 69,733±25,741

From the above results, nanoparticles containing dolastatin 10 do not show a distinct change in particle characteristics according to the mixing ratio of DSPE-PEG-FA and DSPE-PEG-RGD, respectively, and under all conditions, small particle size and PDI of about 100 nm or less It showed a uniform particle distribution of 0.3 or less. The zeta potential also exhibited stable particle properties with an absolute value of 30 mV or higher.

<3-3> DSPE - PEG:DSPE -Cytotoxicity according to PEG-FA mixing ratio

<3-3-1> Normal cytotoxicity evaluation

In the same manner as in Example 3-1, nanoparticles having a mixing ratio of DSPE-PEG and DSPE-PEG-FA of 60:10, 50:10, 48:12, 45:15 and 40:20, respectively, were prepared. After measuring the collection efficiency of dolastatin 10 in the prepared nanoparticles, the concentration of dolastatin 10 was diluted to be 25, 50 or 75 ng/ml. Cytotoxicity of each diluted nanoparticle was evaluated in the same manner as in Example 1-2.

As a result, it was found that the cell viability of HEK293 cells decreased in a concentration-dependent manner with dolastatin 10. When the nanoparticles with final concentrations of dolastatin 10 were 25 and 50 ng/ml, cell viability was higher than about 79% and no significant effect was observed with the proportion of DSPE-PEG-FA, but the final concentration of dolastatin 10 When the nanoparticles treated with 75 ng/ml, the cell viability tended to decrease as the proportion of DSPE-PEG-FA increased (FIG. 16 ).

<3-3-2> Anti-cancer activity evaluation

The anticancer activity of each nanoparticle prepared in 3-3-1 was evaluated in the same manner as in Example 1-3.

As a result, it was found that the anti-cancer activity against B16F10 cells increased in a concentration-dependent manner with dolastatin 10. As the proportion of DSPE-PEG-FA increased in all concentration ranges, the cell inhibition rate tended to increase significantly. In particular, it was confirmed that nanoparticles having a final concentration of dolastatin 10 of 75 ng/ml exhibited the best anticancer activity when the ratio of DSPE-PEG:DSPE-PEG-FA was 40:20. This is 1.4 to 1.6 times superior to free dolastatin 10 (FIG. 17 ).

<3-3-3> Anticancer activity ratio against cancer cells against cytotoxicity against normal cells

The ratio of cytotoxicity to HEK293 cells and anti-cancer activity against B16F10 cancer cells of the nanoparticles containing DSPE-PEG and dolastatin 10 with FA was calculated. The ratio was measured for nanoparticles having final concentrations of 25 and 50 ng/ml of dolastatin 10, which showed a cell viability of 80% or more for normal cells.

As a result, nanoparticles having a final concentration of dolastatin 10 of 25 ng/ml increased selectivity to cancer cells by adding FA, and the ratio of DSPE-PEG:DSPE-PEG-FA was 40:20 days. When, it showed the best selectivity for cancer cells (Fig. 18). Nanoparticles with a final concentration of dolastatin 10 of 50 ng/ml had the highest selectivity when the ratio of DSPE-PEG:DSPE-PEG-FA was 40:20, but the selectivity was relatively lower than that of 25 ng/ml dolastatin 10. Appeared.

As a result, the final concentration of dolastatin 10 was 25 ng/ml, and the nanoparticles prepared with a ratio of DSPE-PEG:DSPE-PEG:FA of 40:20 had the least toxicity to normal cells and showed the best anti-cancer activity. Presents excellence.

<3-4> DSPE -PEG and DSPE -PEG- RGD Cytotoxicity by mixing ratio

<3-4-1> Normal cytotoxicity evaluation

In the same manner as in Example 3-2, nanoparticles having a mixing ratio of DSPE-PEG and DSPE-PEG-RGD of 60:10, 50:10, 48:12, 45:15 and 40:20, respectively, were prepared. After measuring the collection efficiency of dolastatin 10 in the prepared nanoparticles, the final concentration of dolastatin 10 was diluted to 25, 50 or 75 ng/ml.

As a result, the cell viability of HEK293 cells was found to decrease with concentration of dolastatin 10, but the survival rate tended to increase significantly as RGD was mixed at all concentrations. Cell viability was found to be at least about 79% at all concentrations, confirming that there was no cytotoxicity, and no significant effect was observed according to the ratio of DSPE-PEG-RGD (FIG. 19).

<3-4-2> Anti-cancer activity evaluation

The anticancer activity of each nanoparticle prepared in 3-4-1 was evaluated in the same manner as in Example 1-3.

As a result, it was found that the anti-cancer activity against B16F10 cells increased in a concentration-dependent manner with dolastatin 10. When the ratio of DSPE-PEG:DSPE-PEG-RGD was 45:15 in all concentration conditions, it showed the best anticancer activity, which is 1.2 to 1.5 times superior to free dolastatin 10 (FIG. 20 ).

<3-4-3> Ratio of cytotoxicity to normal cells and anticancer activity against cancer cells

The ratio of cytotoxicity to HEK293 cells and anti-cancer activity against B16F10 cancer cells of nanoparticles including DSPE-PEG and dolastatine 10 with RGD was calculated. The ratio was measured for nanoparticles having final concentrations of 25 and 50 ng/ml of dolastatin 10, which showed a cell viability of 80% or more for normal cells.

As a result, nanoparticles having a final concentration of dolastatin 10 of 25 ng/ml increased selectivity to cancer cells by adding RGD, and the ratio of DSPE-PEG:DSPE-PEG-RGD was 45:15 days. When, it showed the best selectivity for cancer cells (Fig. 21). Nanoparticles with a final concentration of dolastatin 10 of 50 ng/ml also showed the best selectivity for cancer cells when the ratio of DSPE-PEG:DSPE-PEG-RGD was 45:15, but rather than 25 ng/ml dolastatin. It was found that the selectivity was relatively low.

The results show that when the final concentration of dolastatin 10 is 25 ng/ml, and when the nanoparticles are prepared with a ratio of DSPE-PEG:DSPE-PEG:RGD of 45:15, the anti-cancer activity is less toxic to normal cells. This presents the best.

< Example 4> Nanoparticles Dolastatin 10 Capture efficiency

Stock solution of dolastatin 10 (200 μg/ml) was added to the PLGA oil solution at a concentration of 20/3 mg/ml, and DSPE-PEG and DSPE-PEG- were prepared in the same manner as in Examples 3-1 and 3-2. Nanoparticles were prepared with a mixing ratio of FA and DSPE-PEG and DSPE-PEG-RGD of 60:10, 50:10, 48:12, 45:15 and 40:20, respectively. The encapsulation efficiency (EE) of each prepared nanoparticle was measured.

Specifically, when the nanoparticles were prepared, the separated solution was centrifuged to treat the separated solution as free dolastatin 10, and the separated solution was pretreated using a Compa-Able ^TM protein assay precipitation reagent set. Then, free dolastatin 10 was measured using a BCA (Bicinchoninic acid) method. The collection efficiency was calculated by the following calculation formula.

As a result, the nanoparticles containing DSPE-PEG-FA showed a capture efficiency of about 73-82%, and the nanoparticles containing DSPE-PEG-RGD showed about 77-85% capture efficiency. There was no significant difference according to the ratio of -PEG-FA and DSPE-PEG-RGD (Figs. 22 and 23).

< Example 5> Nanoparticles Dolastatin 10 Containing efficiency

Stock solution of dolastatin 10 (200 μg/ml) was added to the PLGA oil solution at a concentration of 20/3 mg/ml, and DSPE-PEG and DSPE-PEG- were prepared in the same manner as in Examples 3-1 and 3-2. Nanoparticles having a mixing ratio of FA of 40:20 and a mixing ratio of DSPE-PEG and DSPE-PEG-RGD of 45:15 were prepared, respectively. The loading efficiency (LE) of each prepared nanoparticle was measured.

Specifically, after extracting dolastatin 10 from lyophilized nanoparticles, it was dispersed in acetonitrile and stirred for 48 hours (37°C, 300 rpm), followed by centrifugation. The supernatant was separated and the content of dolastatin 10 in the supernatant was analyzed by the BCA method. The content efficiency of dolastatin 10 was calculated by the following formula.

As a result, the efficiency of containing nanoparticles containing FA or RGD was higher than that of nanoparticles not containing FA or RGD, and DSPE was higher than nanoparticles having a ratio of DSPE-PEG:DSPE-PEG-FA of 40:20. The content efficiency of nanoparticles with a ratio of -PEG:DSPE-PEG-RGD of 45:15 was better (FIG. 24).

< Example 6> Evaluation of cell permeability of nanoparticles

Nanoparticles were prepared in the same manner as in Example 5, except that coumarin-6 was used instead of dolastatin 10. Cell permeability of each prepared nanoparticle was analyzed.

Specifically, each nanoparticle was treated with B16F10 cells, and the cell nuclei were stained with PI to visually confirm the degree of standard absorption in the cells, and the state absorbed in the cytoplasm was observed with a confocal laser scanning microscope (CLSM). Specifically, 1.6×10 ⁵ cell number/mL of B16F10 cells per well of each 6-well plate with cover glass was dispensed, and cultured in an incubator at 37° C., 5% CO ₂ and 95% humidity. The medium was replaced at 48 hour intervals, and when the cell confluency reached 75 to 80%, forming a cell monolayer, the medium was removed. Each well was treated with a standard nanoparticle dispersion labeled with coumarin-6 or 0.5 ml of each nanoparticle, and 2 ml of medium and cultured. After 2 hours of culture, the treated sample was removed and the cells were washed twice with PBS, and then treated with 70% ethanol (pH 7.1, PBS) to fix the cells. After 15 minutes, ethanol was removed and washed with PBS, PI was treated and cultured for 20 minutes to stain the nuclei of B16F10 cells. After completion of staining, PI was removed and cells were washed with PBS. The cover glass was removed from the plate, and the mounting solution was dropped onto the slide glass and dried for 1 hour. In order to measure the degree of nanoparticle transmission to B16F10 cells, emission and excitation were measured at 505 nm and 420 nm, respectively, using a confocal laser scanning microscope (CLSM), and the fluorescence intensity was image software. system (NIH, Bethesda, MD, USA).

As a result, green fluorescence was observed around the red stained cell nuclei, confirming that each nanoparticle was absorbed into the cell. In the case of free coumarin-6, free coumarin-6 showed the lowest fluorescence intensity, and among the prepared nanoparticles, the fluorescence intensity of nanoparticles with a DSPE-PEG:DSPE-PEG-FA ratio of 40:20 was the highest. . This is consistent with in vitro anticancer activity results (FIGS. 25 and 26 ).

Claims (12)

Method of preparing a nanoparticle comprising a drug comprising the following steps:
1) preparing an oil phase solution comprising a drug and a poly(lactic-co-glycolic acid) (PLGA);
2) preparing a water phase solution comprising lecithin, DSPE-PEG (1,2-Distearoyl-sn-Glycero-3-Phosphoethanolamine-Polyethylene Glycol) and DSPE-PEG attached with a cancer cell target substance; And
3) mixing the oil phase solution prepared from step 1) and the water phase solution prepared from step 2) to obtain nanoparticles.
The method of claim 1, further comprising the step of treating ultrasound after mixing the oil phase solution and the aqueous phase solution of step 3).
According to claim 1, wherein the cancer cell target material of step 2) is folic acid, Arg-Gly-Asp RGD tripeptide consisting of the amino acid sequence, Asn-Gly-Arg consisting of the amino acid sequence of the NGR tripeptide and transferrin (transferrin) Method for producing nanoparticles, any one or more selected from the group consisting of.
The method of claim 1, wherein the cancer cell target material of step 2) is folic acid,
The DSPE-PEG of step 2) and DSPE-PEG with folic acid attached are mixed at a ratio of 1.5 to 2.5:1, the method of producing nanoparticles.
According to claim 1, wherein the cancer cell target material of step 2) is an RGD tripeptide consisting of the amino acid sequence of Arg-Gly-Asp,
The DSPE-PEG of step 2) and the DSPE-PEG attached to the RGD tripeptide are mixed at a ratio of 2.5 to 3.5:1, a method for producing nanoparticles.
The method of claim 1, wherein the drug is dolastatin 10.
The method of claim 6, further comprising the step of mixing the oil phase solution and the aqueous phase solution of the step 3), ultrasonic treatment, and diluting the final concentration of the dolastatin 10 to 10 to 90 ng / ㎖, nano Method for producing particles.
The method of claim 1, wherein the content of PLGA in step 1) is 5 to 8 mg/ml.
The method of claim 1, wherein the size of the nanoparticles containing the drug is 80 to 110 nm.
Nanoparticles containing a drug prepared by the method of claim 1.
A pharmaceutical composition for preventing or treating cancer, comprising 10 particles of nanoparticles containing the drug prepared by the method of claim 1 as an active ingredient, wherein the drug is dolastatin 10.
The pharmaceutical composition for preventing or treating cancer according to claim 11, wherein the cancer is skin cancer, colon cancer, lung cancer, breast cancer, stomach cancer, cervical cancer, bladder cancer or blood cancer.

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