WO2006021367A1 - Nanopartikel und verfahren zu deren herstellung - Google Patents
Nanopartikel und verfahren zu deren herstellung Download PDFInfo
- Publication number
- WO2006021367A1 WO2006021367A1 PCT/EP2005/008954 EP2005008954W WO2006021367A1 WO 2006021367 A1 WO2006021367 A1 WO 2006021367A1 EP 2005008954 W EP2005008954 W EP 2005008954W WO 2006021367 A1 WO2006021367 A1 WO 2006021367A1
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- WO
- WIPO (PCT)
- Prior art keywords
- nanoparticles
- gelatin
- molecular weight
- proportion
- kda
- Prior art date
Links
- 239000002105 nanoparticle Substances 0.000 title claims abstract description 117
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims description 25
- 229920000159 gelatin Polymers 0.000 claims abstract description 76
- 235000019322 gelatine Nutrition 0.000 claims abstract description 76
- 108010010803 Gelatin Proteins 0.000 claims abstract description 73
- 235000011852 gelatine desserts Nutrition 0.000 claims abstract description 73
- 239000008273 gelatin Substances 0.000 claims abstract description 70
- 239000000499 gel Substances 0.000 claims abstract description 10
- 239000013543 active substance Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 239000003814 drug Substances 0.000 claims description 8
- 238000002360 preparation method Methods 0.000 claims description 8
- 238000012377 drug delivery Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000003431 cross linking reagent Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 108010029541 Laccase Proteins 0.000 claims description 3
- 108060008539 Transglutaminase Proteins 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 150000001718 carbodiimides Chemical class 0.000 claims description 3
- 125000005442 diisocyanate group Chemical group 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 3
- 150000002513 isocyanates Chemical class 0.000 claims description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 3
- 102000003601 transglutaminase Human genes 0.000 claims description 3
- 238000007385 chemical modification Methods 0.000 claims description 2
- 238000001415 gene therapy Methods 0.000 claims description 2
- 230000003834 intracellular effect Effects 0.000 claims description 2
- 108020004707 nucleic acids Proteins 0.000 claims description 2
- 102000039446 nucleic acids Human genes 0.000 claims description 2
- 150000007523 nucleic acids Chemical class 0.000 claims description 2
- 108090000765 processed proteins & peptides Proteins 0.000 claims description 2
- 102000004196 processed proteins & peptides Human genes 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 108090000790 Enzymes Proteins 0.000 claims 1
- 102000004190 Enzymes Human genes 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 239000007858 starting material Substances 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 description 15
- 238000002296 dynamic light scattering Methods 0.000 description 6
- 238000005227 gel permeation chromatography Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 5
- 239000004480 active ingredient Substances 0.000 description 4
- 239000001828 Gelatine Substances 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000004128 high performance liquid chromatography Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 108010088751 Albumins Proteins 0.000 description 1
- 102000009027 Albumins Human genes 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- 241000283690 Bos taurus Species 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 229920001651 Cyanoacrylate Polymers 0.000 description 1
- ZNZYKNKBJPZETN-WELNAUFTSA-N Dialdehyde 11678 Chemical compound N1C2=CC=CC=C2C2=C1[C@H](C[C@H](/C(=C/O)C(=O)OC)[C@@H](C=C)C=O)NCC2 ZNZYKNKBJPZETN-WELNAUFTSA-N 0.000 description 1
- -1 Ethanol Chemical compound 0.000 description 1
- 102000016359 Fibronectins Human genes 0.000 description 1
- 108010067306 Fibronectins Proteins 0.000 description 1
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000003275 alpha amino acid group Chemical group 0.000 description 1
- 230000000890 antigenic effect Effects 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005354 coacervation Methods 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- NLCKLZIHJQEMCU-UHFFFAOYSA-N cyano prop-2-enoate Chemical class C=CC(=O)OC#N NLCKLZIHJQEMCU-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 230000002255 enzymatic effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 239000000416 hydrocolloid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- 239000003058 plasma substitute Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 235000015277 pork Nutrition 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 210000004881 tumor cell Anatomy 0.000 description 1
- 238000000825 ultraviolet detection Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/51—Nanocapsules; Nanoparticles
- A61K9/5107—Excipients; Inactive ingredients
- A61K9/513—Organic macromolecular compounds; Dendrimers
- A61K9/5169—Proteins, e.g. albumin, gelatin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/51—Nanocapsules; Nanoparticles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/51—Nanocapsules; Nanoparticles
- A61K9/5192—Processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y5/00—Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery
Definitions
- the present patent application relates to nanoparticles, the use of nanoparticles for the production of medicaments and a method for the production of nanoparticles.
- Nanoparticles as carrier systems for pharmaceutical substances have been known since the 1970s. They allow a targeted transport of the active ingredients in a ge desired area of the body, wherein the release takes place only at the destination (so-called drug delivery systems). At the same time, the active ingredient, which has not yet been released, is effectively shielded against metabolic influences of the body. Thus, side effects can be minimized by the Wirkstoff ⁇ molecules predominantly and targeted arrive at their actual site of action and less burden on the whole organism.
- Fibronectin various polysaccharides, albumin, collagen and gelatin are known, among other things, as natural, degradable carrier materials.
- Another difficulty with the known nanoparticles consists in the sometimes wide size distribution, which is disadvantageous in terms of a uniform release and transport behavior.
- the size distribution of such nanoparticles can be made narrower to a certain extent by complicated centrifugation and other separation methods, this does not lead to a satisfying result.
- the object underlying the present application is therefore to provide biodegradable nanoparticles which ensure uniform and definable drug delivery.
- the object is to specify a suitable method for producing this nanoparticle.
- nanoparticles of the type mentioned consist essentially of an aqueous gelatin gel, wherein the average diameter of the nanoparticles is at most 350 nm and the polydispersity index of the nanoparticles is less than or equal to 0.15.
- Gelatine has as starting material! for nanoparticles a number of advantages. It is available in defined composition and purity and has a relatively low antigenic potential. Gelatine is also approved for parenteral use, including as a plasma expander.
- amino acid side chains of gelatin offer the simple possibility of chemically modifying the surface of the nanoparticles, of crosslinking the latins or of covalently binding active ingredient molecules to the particles.
- aqueous gelatin gel is to be understood as meaning that the gelatin contained in the nanoparticles in hydrated form, ie as hydrocolloid. Since the nanoparticles are always surrounded by an aqueous solution during their preparation and use, all information on the size and polydispersity of the nanoparticles relates to this hydrated form. The determination of these parameters is carried out using the standard method of photon correlation spectroscopy (PCS), which is described in more detail below.
- PCS photon correlation spectroscopy
- the expression “consisting essentially of” is to be understood as meaning that the nanoparticles are at least 95% by weight or more, preferably 97% by weight or more, even more preferably up to 98% by weight or more and most preferably 99% by weight or more of the aqueous gelatin gel.
- the polydispersity index is a measure of the size distribution of the nanoparticles, whereby theoretically values between 1 (maximum scattering) and 0 (identical size of all particles) are possible.
- the low polydispersity index of the nanoparticles according to the invention of not more than 0.15 ensures targeted and controllable drug delivery as well as the release of the drug at the desired target site, in particular when uptake of the nanoparticles by body cells.
- nanoparticles having a polydispersity index of less than or equal to 0.1 are particularly preferred.
- the size of the nanoparticles is a decisive factor for their applicability and may vary depending on the field of application. In many cases, nanoparticles with an average diameter of at most 200 nm are preferred.
- Another embodiment of the invention relates to nanoparticles having an average diameter of at most 150 nm, preferably from 80 to 150 nm. These can be used by utilizing the so-called EPR effect (enhanced permeability and retention). This effect makes it possible to specifically treat tumor cells which have a higher uptake rate than nanoparticles of the stated size range than healthy cells.
- Another parameter for the size distribution of the nanoparticles is the band width of the diameter, which is preferably at a maximum of 20 nm above and below the mean value.
- the bandwidth can also be determined by means of PCS.
- the properties of the nanoparticles according to the invention can also be influenced by the molecular weight distribution of the gelatin contained.
- the proportion of low molecular weight gelatin in particular the proportion of gelatin having a molecular weight below 65 kDa, based on the total gelatin contained in the nanoparticles. This proportion is preferably below 40 wt .-%. Particularly advantageous is a proportion of less than 30 wt .-%, preferably 20 wt .-% and Weni ⁇ ger.
- nanoparticles are usually described which, in addition, contain further structural polymers (for example nanoparticles produced by the coacervation process, as described in WO 01/47501 A1).
- the nanoparticles made of pure gelatin prepared hitherto are either unstable or do not have the parameters described above with regard to particle diameter and size distribution which are advantageous for selective drug delivery.
- the gelatin contained in the nanoparticles is crosslinked. Networking will increase the stability of the nanoparticles!
- the degree of decomposition of the nanoparticles can be deliberately adjusted by the degree of crosslinking selected. This is advantageous since different application areas usually require defined degradation times of the nanoparticles.
- Non-crosslinked nanoparticles are suitable for extracorporeal, in particular diagnostic, applications in which, below the melting point of gelatin, e.g. can be operated at room temperature.
- crosslinked nanoparticles are particularly suitable for therapeutic applications.
- the gelatin may be chemically crosslinked, e.g. by formaldehyde, dialdehyde, isocyanates, diisocyanates, carbodiimides or alkyldihaiogenides.
- enzymatic crosslinking e.g. by transglutaminase or laccase.
- the nanoparticles according to the invention are dried, preferably up to a water content of not more than 15% by weight.
- Another embodiment of the invention relates to nanoparticles, on the surface of which a pharmaceutical active substance is bound.
- the surface of the nanoparticles is chemically modified, e.g. by the reaction of free amino or carboxyl groups of the gelatin, whereby charged So ⁇ chains or side chains with a new chemical functionality entste ⁇ hen.
- the binding of the pharmaceutical active substance to the nanoparticles or to the chemically modified nanoparticles can be effected by adsorption forces, by covalent bonds or by ionic bonds.
- nanoparticles whose surfaces are positively charged by a corresponding chemical modification, DNA or RNA fragments are ionically bound ge ⁇ .
- the binding of the active ingredient to the nanoparticles takes place via a spacer.
- the nanoparticles described above can be used according to the invention for the production of medicaments.
- nanoparticles for intracellular drug delivery systems, in particular as a carrier for nucleic acids or peptides.
- Medicaments containing nanoparticles according to the invention can preferably be used in gene therapy.
- the present invention further relates to a process for the preparation of nanoparticles of the type described above.
- the object underlying the invention with regard to the method is achieved by using a gelatin as the starting material for the preparation process whose maximum amount of gelatin having a molecular weight of less than 65 kDa, based on the total gelatin 40 wt .-% is.
- nanoparticles having a low polydispersity and bandwidth of the particle diameter can be produced in a simple manner, in particular the nanoparticles according to the invention having a polydispersity index of less than or equal to 0.15.
- an aqueous solution is first prepared from such a gelatin, the pH of which is then adjusted to a value below 7.0.
- a suitable precipitating agent By adding a suitable precipitating agent to this solution, the dissolved gelatin is desolvated in the form of nanoparticles, which are then separated from the solution by simple centrifugation. Fractionation of the nanoparticles, e.g. by gradient centrifugation, is not necessary, since its polydispersity is already in a sufficiently low range as a result of the production process according to the invention.
- Nanoparticles according to the invention are therefore preferably substantially free of the stated additives.
- the inventive method thus enables the production of Nanoparticles, which essentially consist only of an aqueous gelatin gel.
- gelatin with the molecular weight distribution described above ensures the formation of stable nanoparticles.
- Gelatins with a higher low molecular weight fraction in this process increasingly lead to the formation of larger aggregates or unstable particles.
- the proportion of gelatin having a molecular weight of less than 65 kDa is at most 30% by weight, most preferably at most 20% by weight.
- the adjusted pH of the gelatin solution is less than or equal to 3.0, preferably in the range of 1.5 to 3.0.
- the pH can be z.T. an influence on the mean particle size are exerted, with a lower pH tends to result in smaller nanoparticles.
- acetone In a further preferred embodiment acetone, alcohols, e.g. Ethanol, or mixtures of these precipitants used in succession or with water, acetone is be ⁇ preferred as the precipitating agent.
- the use of volatile precipitants of this kind largely avoids the fact that fractions of the precipitant are incorporated into the nanoparticles and / or remain so that they consist essentially only of the aqueous gelatin gel.
- the proportion of gelatin having a molecular weight below 65 kDa is preferably 20% by weight or less in order to counteract agglomeration of the particles upon crosslinking.
- FIG. 1 shows the gel permeation chromatograms of two gelatins (FIGS. 1A and 1B, respectively) representing the molecular weight distribution of the respective gelatin;
- FIG. 2 an electron micrograph of nanoparticles according to the invention.
- FIG. 3 shows a size distribution of nanoparticles produced according to the invention.
- the molecular weight distribution of the gelatin can be used to influence the properties of the nanoparticles produced therefrom.
- the molecular weight distribution can be determined by gel permeation chromatography (GPC). The determination is carried out on an HPLC system with the following components:
- Plasticizer 1% by weight SDS, 100 mmol / l Na 2 SO 4 ,
- the assignment between elution volume and molecular weight is carried out by calibrating the system with a standard gelatin having a known molecular weight distribution. By dividing the chromatogram into defined ranges and integrating the UV detector signal, the proportion of gelatin which lies in the respective molecular weight range can be calculated.
- FIG. 1 shows by way of example the gel permeation chromatograms of two different gelatins:
- FIG. 1A shows the GPC of a commercial pork rind gelatin (Type A gelatin) with a bloom value of 175. Due to the high proportion of gelatin with a molecular weight below 65 kDa, which is above 45% by weight, this gelatin is for the production process according to the invention are not suitable for nanoparticles and leads to particles with too high polydispersity or agglomeration of the particles.
- FIG. 1B shows the GPC of a pigskin gelatin having a bloom value of 310 and a proportion of gelatin having a molecular weight of less than 65 kDa of about 15% by weight. This gelatin is very well suited for the production process according to the invention.
- Photon correlation spectroscopy allows the determination of the mean particle diameter of the nanoparticles, the polydispersity index and the bandwidth of the particle diameter above and below the mean value.
- nanoparticle suspensions were used with a concentration of 10 to 50 ug / ml in de-mineralized water.
- This example describes the preparation of crosslinked nanoparticles from gelatin, the GPC of which is shown in FIG. 1B (with a proportion of gelatin having a molecular weight below 65 kDa of about 15% by weight).
- Crosslinked nanoparticles are prepared as described in Example 1, with a pigskin gelatin having a bloom value of 270, whose proportion of gelatin having a molecular weight below 65 kDa being about 19% by weight, being used as starting material.
- an average particle diameter of about 173 nm and a polydispersity index of about 0.08 were determined by the PCS method described above.
- the size distribution was comparable to the nanoparticles prepared according to Example 1.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Nanotechnology (AREA)
- Pharmacology & Pharmacy (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Optics & Photonics (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- General Engineering & Computer Science (AREA)
- Biotechnology (AREA)
- Biophysics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Medicinal Preparation (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Jellies, Jams, And Syrups (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2005276675A AU2005276675A1 (en) | 2004-08-20 | 2005-08-18 | Nanoparticles and method for the production thereof |
CA002575407A CA2575407A1 (en) | 2004-08-20 | 2005-08-18 | Nanoparticles and method for the production thereof |
JP2007526390A JP2008510688A (ja) | 2004-08-20 | 2005-08-18 | ナノ粒子およびその製造方法 |
NZ551326A NZ551326A (en) | 2004-08-20 | 2005-08-18 | Gelatine nanoparticles, for use in medicine, and method for the production thereof |
MX2007001996A MX2007001996A (es) | 2004-08-20 | 2005-08-18 | Nanoparticulas y metodo para su produccion. |
EP05783457A EP1793810A1 (de) | 2004-08-20 | 2005-08-18 | Nanopartikel und verfahren zu deren herstellung |
BRPI0514524-4A BRPI0514524A (pt) | 2004-08-20 | 2005-08-18 | nanopartìculas e processo para sua fabricação |
IL180954A IL180954A0 (en) | 2004-08-20 | 2007-01-25 | Nanoparticles and method for the production thereof |
US11/675,643 US20080003292A1 (en) | 2004-08-20 | 2007-02-16 | Nanoparticles and method for the production thereof |
NO20071458A NO20071458L (no) | 2004-08-20 | 2007-03-19 | Nanopartikkel og fremgangsmate for fremstilling av denne |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004041340.1 | 2004-08-20 | ||
DE102004041340A DE102004041340A1 (de) | 2004-08-20 | 2004-08-20 | Nanopartikel und Verfahren zu deren Herstellung |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/675,643 Continuation US20080003292A1 (en) | 2004-08-20 | 2007-02-16 | Nanoparticles and method for the production thereof |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006021367A1 true WO2006021367A1 (de) | 2006-03-02 |
Family
ID=35276582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/008954 WO2006021367A1 (de) | 2004-08-20 | 2005-08-18 | Nanopartikel und verfahren zu deren herstellung |
Country Status (14)
Country | Link |
---|---|
US (1) | US20080003292A1 (de) |
EP (1) | EP1793810A1 (de) |
JP (1) | JP2008510688A (de) |
KR (1) | KR20070046850A (de) |
CN (1) | CN1988892A (de) |
AU (1) | AU2005276675A1 (de) |
BR (1) | BRPI0514524A (de) |
CA (1) | CA2575407A1 (de) |
DE (1) | DE102004041340A1 (de) |
IL (1) | IL180954A0 (de) |
MX (1) | MX2007001996A (de) |
NO (1) | NO20071458L (de) |
NZ (1) | NZ551326A (de) |
WO (1) | WO2006021367A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007086613A1 (en) * | 2006-01-30 | 2007-08-02 | Fujifilm Corporation | Enzymatically crosslinked protein nanoparticles |
JP2008001764A (ja) * | 2006-06-21 | 2008-01-10 | Gunma Univ | タンパク質からなる粒子状成形体の製造方法及び、該方法により得られたタンパク質からなる粒子状成形体 |
JP2008110926A (ja) * | 2006-10-30 | 2008-05-15 | Fujifilm Corp | 水分散可能なナノ粒子 |
JP2008260705A (ja) * | 2007-04-11 | 2008-10-30 | Fujifilm Corp | 注射用組成物 |
EP1997477A1 (de) * | 2007-05-31 | 2008-12-03 | FUJIFILM Corporation | Hautmittel gegen Akne zur äußeren Anwendung |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP5484732B2 (ja) | 2005-12-14 | 2014-05-07 | サイトス バイオテクノロジー アーゲー | 過敏症の治療のための免疫賦活性核酸パッケージ粒子 |
EP1968649A4 (de) * | 2005-12-20 | 2012-12-19 | Fujifilm Corp | Protein-nanoteilchen und ihre verwendung |
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DE602007002784D1 (de) * | 2007-03-16 | 2009-11-26 | Univ Nat Chi Nan | Bioabbaubares Material mit Nanoporen und elektrischer Leitfähigkeit sowie Herstellungsverfahren dafür |
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- 2005-08-18 KR KR1020077003208A patent/KR20070046850A/ko not_active Withdrawn
- 2005-08-18 CA CA002575407A patent/CA2575407A1/en not_active Abandoned
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JP2008260705A (ja) * | 2007-04-11 | 2008-10-30 | Fujifilm Corp | 注射用組成物 |
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JP2008297241A (ja) * | 2007-05-31 | 2008-12-11 | Fujifilm Corp | ニキビ用皮膚外用剤 |
Also Published As
Publication number | Publication date |
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IL180954A0 (en) | 2007-07-04 |
JP2008510688A (ja) | 2008-04-10 |
KR20070046850A (ko) | 2007-05-03 |
CA2575407A1 (en) | 2006-03-02 |
NZ551326A (en) | 2010-04-30 |
EP1793810A1 (de) | 2007-06-13 |
CN1988892A (zh) | 2007-06-27 |
US20080003292A1 (en) | 2008-01-03 |
DE102004041340A1 (de) | 2006-02-23 |
AU2005276675A1 (en) | 2006-03-02 |
MX2007001996A (es) | 2007-05-10 |
BRPI0514524A (pt) | 2008-06-10 |
NO20071458L (no) | 2007-03-19 |
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