WO2012049159A1 - Zusammensetzung zur behandlung von krebs mit kontrollierter freisetzung des wirkstoffs - Google Patents
Zusammensetzung zur behandlung von krebs mit kontrollierter freisetzung des wirkstoffs Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/70—Carbohydrates; Sugars; Derivatives thereof
- A61K31/7028—Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages
- A61K31/7034—Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages attached to a carbocyclic compound, e.g. phloridzin
- A61K31/704—Compounds having saccharide radicals attached to non-saccharide compounds by glycosidic linkages attached to a carbocyclic compound, e.g. phloridzin attached to a condensed carbocyclic ring system, e.g. sennosides, thiocolchicosides, escin, daunorubicin
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
- A61K47/22—Heterocyclic compounds, e.g. ascorbic acid, tocopherol or pyrrolidones
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/54—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound
- A61K47/543—Lipids, e.g. triglycerides; Polyamines, e.g. spermine or spermidine
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
- A61K47/54—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound
- A61K47/55—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound the modifying agent being also a pharmacologically or therapeutically active agent, i.e. the entire conjugate being a codrug, i.e. a dimer, oligomer or polymer of pharmacologically or therapeutically active compounds
- A61K47/551—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic compound the modifying agent being also a pharmacologically or therapeutically active agent, i.e. the entire conjugate being a codrug, i.e. a dimer, oligomer or polymer of pharmacologically or therapeutically active compounds one of the codrug's components being a vitamin, e.g. niacinamide, vitamin B3, cobalamin, vitamin B12, folate, vitamin A or retinoic acid
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/69—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit
- A61K47/6905—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit the form being a colloid or an emulsion
- A61K47/6911—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit the form being a colloid or an emulsion the form being a liposome
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K47/00—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient
- A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
- A61K47/69—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit
- A61K47/6905—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit the form being a colloid or an emulsion
- A61K47/6911—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit the form being a colloid or an emulsion the form being a liposome
- A61K47/6913—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the conjugate being characterised by physical or galenical forms, e.g. emulsion, particle, inclusion complex, stent or kit the form being a colloid or an emulsion the form being a liposome the liposome being modified on its surface by an antibody
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
Definitions
- the present invention relates to a novel composition for the treatment of cancer, which allows to release the active ingredient in the direct presence of the cells to be treated with the active ingredient.
- the composition comprises a drug carrier in the form of a liposome comprising a disulfide group, wherein in the drug carrier is a cytostatic agent.
- the invention also relates to a method for the localized release of a cytostatic agent.
- Drug release drug delivery systems based on liposome carriers of about 100 nm in size are generally known in the medical arts. They are generally regarded as advantageous if a substance which is toxic to certain organs but which can be used as a medicinal agent in other places of the human body should only be released at those desired sites.
- the abovementioned toxic substances also include so-called cytostatic agents, which, however, can also be used as medical therapeutics in the correct dosage and in application to specific, in particular degenerately diseased tissue types.
- cytostatic agents which, however, can also be used as medical therapeutics in the correct dosage and in application to specific, in particular degenerately diseased tissue types.
- liposome carriers is generally understood a substance group consisting of non-toxic phospholipids.
- polymers such as polyethylene glycols, involved, which are characterized by improved stability in the circulation of treated patients, as the aforementioned polyethylene glycols form a form of steric protection around the actual Lipos omenexcellent.
- Lipopo! Ymere a substance group consisting of non-toxic phospholipids.
- liposome carriers are also described by J. Davidsen et al. in "Secreted phospholipase A2 as a novel enzymatic trigger mechanism for localized liposomal drug release and absorption in diseased tissue" published in Biochimica et Biophysica Acta 1609 (2003) 95 - 101. Further, J. Davidsen et al Drug carrier in F rm aforementioned liposome carrier can depend in particular with respect to their release behavior of a variety of chemical and physical parameters whose interaction is not fully understood.
- the liposome carrier can be prepared from l, 2-hexadecanoyl-sn-glycero-3-phosphocholine (DPPC) and / or 1,2-hexadecanoyl-sn-glycero-3-phosphoethanolamine-N- [methoxy (polyethylene glycol) -2000] (DPPE - PEG2000) and / or 1-0-hexadecanoyl-2-hexanodecanoyl-sn-glycero-3-phosphocholine (10-DPPC) and / or 1 -0-hexadecanoyl-2-hexanodecanoyl-sn-glycero-3-phospho-ethanolamine N- [methoxy] (Polyethylene glycol) -350] (1-O-DPPE-PEG350).
- DPPC 2-hexadecanoyl-sn-glycero-3-phosphocholine
- DPPE - PEG2000 1,2-hexadecanoyl-
- calcein can be included in the liposome formulation comprising 1-O-DPPC and 10 mol% of 1-O-DPPE-PEG350. Calcein is referred to as a model substance for drugs. Release of calcein may be as disclosed by J. Davidsen et al. by treatment of this liposome formulation with phospholipase A2 (PLA2). Release is by hydrolytic cleavage of either DPPC or 1-O-DPPC, or 1-O-DPPE-PEG350, which is catalyzed by PLA2 to give a lysolipid and a fatty acid.
- PDA2 phospholipase A2
- Davidsen also describes a possibility of using liposome formulations generally for the release of doxorubicin, which is a cytostatic. However, there is no actual disclosure regarding this issue. With that reveal.!. Davidsen et al. neither a cleavage into a hydrophobic and a hydrophilic portion nor that the liposome support can comprise a disulfide bond. In particular, J. Davidsen et al. not that in the course of a cytostatic drug is released.
- Meng et al. is disclosed in "Reduction-sensitive polymers and bioconjugates for biomedical applications" published in Biomaterials 30 (2009) 2180-2198 that certain disulfide-bridged polymers either in the polymeric strand or in one of its side chains are suitable for inclusion in drugs According to Meng et al., anti-cancer drugs are also used here, but the substances disclosed there always have a polymeric character because particles, ie solids, are formed from them in which the potential active substances are to be included in no case to substances with lipid character, which would be suitable for the production of liposomes.
- the disclosed mode of action of the substances is based on the possibility of bond cleavage of the disulfide group, which either dissolves the polymers or removes the polyethylene glycol side chains attached to the polymers with the disulfide group and thus recognizes the particle after application in the patient by its immune system and degradable. Accordingly, the release from the drug carrier according to the disclosure of Meng et al. either upon dissolution of a solid by cleavage of polymeric bonds or through degradation of the solid by the patient's immune system after the particle has become recognizable to them. In no case will the drug be released directly.
- lipid compositions consist of a hydrophobic "tail group” and a hydrophilic "head group”, wherein the latter hydrophilic "head group” is covalently attached to the hydrophobic "tail group".
- hydrophilic "head group” a distinction is made between a first and a second region, these two regions being linked by a disulphide group which can be cleaved, for example by glutathione
- the first region of the hydrophilic "head group” bears, according to WO 2000/059474 AI at physiological pl 1 a positive charge and the second region carries at physiological pH a negative charge.
- the first region is covalently attached to the hydrophobic "tail group.”
- the chemical formula of the abovementioned lipid compositions generally disclosed according to WO 2000/059474 A1 is X-Y-S-S-Z.
- the chemical group X forms the abovementioned hydrophobic " Tail group "and Y, and Z is the first or second region of the hydrophilic head group.
- the chemical group X as a hydrophobic "tail group” may be a group which is substantially similar to the glycerin body of a fat and to which the chemical group Y is attached via a further chemical group W is tethered.
- the chemical group W can be selected from the list consisting of CUR -,. NR 3 + (R 3) 2, O, S, C (0) NH, NH (CO), OC (0) NH and OP (0) (OR 3) 0th
- the chemical group R 3 further contained in the chemical group W may be hydrogen or a C 1 -C 4 alkyl radical.
- the chemical uppe G Y can be a C 1 -C 12 Alklrest, a C 2 -C 2 -C be 2 alkenyl or C 2 alkynyl group having substituents in the form of alkyl radicals, amino radicals, aminoalkyl radicals, Guanidinresten, Guadininalkylresten, amido or Amidoalkylresten, wherein the aforementioned alkyl, alkenyl or alkynyl radicals of the chemical group Y can be further interrupted by NR 3 , + (R 3 ) 2 , C (O), NHC (H), C (NH) NH, NHC (NH) NH , Alternatively, the chemical group Y may also be an amino acid residue or a peptide.
- the chemical group Z can be a C 1 -C 2 -alkyl radical, alkenyl radical or an alkynyl radical which in turn is substituted by alkyl radicals, carboxyl radicals, carboxyalkyl radicals, amino acid radicals, peptides, oligonucieotides or so-called "target molecule radicals" can be.
- the abovementioned chemical groups X, Y and Z must in any case be designed so that the groups X and Y in their entirety have a positive charge at physiological pH and the group Z has a negative charge at physiological pH. Accordingly, in the cleavage of substances of the formula X - Y - S - S - Z on the disulfide group according to WO 2000/059474 Al a group of the type X - Y - S, which is positively charged and a chemical group of the type S Z that is negatively charged.
- the group of the species XYS by virtue of the fact that it still comprises the "hydrophobic tail group" and a positive charge, is a chemical group which has amphiphilic properties, ie which is hydrophobic in one region and hydrophilic in a region .
- Group of the type S - Z is due to their negative charge, and by the fact that it comprises a Ci-C 2 alkyl, alkenyl or alkynyl either also amphiphilic or even - particularly short in the case of alkyl radicals, alkenyl radicals or alkynyl radicals - only hydrophilic.
- WO 2000/059474 AI further discloses that the aforementioned substances for the production of
- Liposomenträgem are suitable by means of which a targeted release of substances can take place at a site of action. The release is based on the chemical cleavage of the disulfide group.
- WO 2000/059474 Al also discloses the use of the local liposome carriers for the release of cancer drugs in general. However, WO 2000/059474 A1 does not disclose that a cleavage of a previously amphiphilic substance into a hydrophilic and a hydrophobic fraction can be achieved.
- the cytostatic agents used in the treatment of cancers are not selective in their cytostatic effect. Thus, this effect generally unfolds both to healthy cells and to the diseased tissue.
- the cytostatic effect on the healthy cells is a serious side effect of these agents.
- the patient is often treated with a larger dose of cytostatics than would require the actual tumor disease, as ensured It must be ensured that the amount of active substance administered to the patient still reaches the site of action (the tumor) in sufficiently large doses.
- the cytostatic side effect on the healthy cells in the determination of the necessary dosage is included in so far as that it is assumed that a part of the cytostatic agent unfolds its effectiveness against healthy lines and thus is no longer available for the effect against the tumor tissue , Accordingly, the above-mentioned side effects in such cases are an intrinsic part of the therapy.
- Another object is to provide a method for the release of a cytostatic agent which is suitable for the targeted treatment of, for example, tumor diseases, in that the cytostatic agent is released rapidly and as quantitatively as possible only in the immediate vicinity of the site of action of the human body.
- composition comprising a drug carrier in the form of a liposome containing a cytostatic agent, characterized in that the drug carrier at least one substance according to the formula (I)
- the at least one substance according to foi (a) in X has a chemical group comprising at least five carbon atoms and comprising at least one ether group and / or amine group or ammonium group, and wherein
- n and m are independently a natural number from 1 to 30, but the sum of n and m is at least 16 found.
- the substances according to the formula (I) in the composition according to the invention that they have in the radicals having 1 to 30 carbon atoms chemical groups which have hydrophobic properties and at the same time cause sterically that when introducing the substances according to the formula (I) in a polar medium, these substances arrange themselves so that these hydrophobic chemical groups are arranged inwards, away from the polar solvent, these form optionally with other substances of the same or similar properties liposomes when introduced into polar solvents, such as water.
- the introduction of the substances according to the formula (I) into a polar medium means that these substances arrange themselves in such a way that the formation of spherical structures in the form of liposomes occurs.
- lipid double Schichlites wherein the hydrophilic chemical groups X of the substances according to the formula (I) both outside and inside towards the polar solvent, which may also be located in the interior of the aforementioned spherical structures, while the hydrophobic chemical groups Both layers are oriented inside the lipid bilayer.
- the hydrophilic chemical groups X of the substances according to the formula (I) both outside and inside towards the polar solvent, which may also be located in the interior of the aforementioned spherical structures, while the hydrophobic chemical groups Both layers are oriented inside the lipid bilayer.
- the cytostatic dissolved in the polar medium, which thus, as long as the lipid bilayer is stable, they can not leave and thus can also develop no cytostatic effect against cells located in the vicinity of the composition.
- the substances according to the formula (I) in the composition according to the invention are selectively cleavable on the envisaged disulfide group, so that hereinafter a hydrophilic chemical group consisting of the chemical group X and a sulfur radical, and a hydrophobic chemical group comprising the radicals with 1 arise up to 30 carbon atoms.
- a hydrophilic chemical group consisting of the chemical group X and a sulfur radical
- a hydrophobic chemical group comprising the radicals with 1 arise up to 30 carbon atoms.
- the radicals with n, m carbon atoms according to the formula (I) are usually saturated hydrocarbon radicals, as also shown in the formula (I).
- the radicals with n, m carbon atoms can also be monounsaturated or polyunsaturated radicals.
- the radicals with n, m carbon atoms can also have one or more double and / or triple bonds.
- the formula (I) is not to be understood in terms of the hydrocarbon radicals having n, m carbon atoms shown therein, in that these radicals are exclusively saturated hydrocarbon radicals with n, m carbon atoms.
- the chemical group X in preferred embodiments comprises at least eight carbon atoms.
- the chemical group X also comprises at least one carboxylic acid ester group in addition to the at least one ether group and / or amine group or ammonium group. It is particularly preferred if the chemical group X comprises either at least two ether groups or at least one amine group or ammonium group and at least two carboxylic acid ester groups.
- the at least one amine group or ammonium group of the chemical group X of the substances according to the formula (I) in the active substance carriers of the composition according to the invention is a quaternary ammonium group.
- the substance according to the formula (I) in the composition according to the invention carries at least one positive charge and is present in combination with at least one singly or multiply negatively charged counterion.
- counterions may be, for example, halogen ions, such as chloride, bromide and / or iodide, but also any other counterions with negative charges.
- the chemical group X of the substances according to the formula (I) in the composition according to the invention comprises at least three ether groups.
- the chemical group X is attached via a carboxylic acid ester group to a chemical group Y according to the further preferred embodiment described below.
- the chemical group X which then more preferably contains only one amine group or ammonium group, is also preferred via this amine group or ammonium group to the rest of the substance according to Tied to formula (I).
- This embodiment is particularly advantageous because the amine group or ammonium group and the at least three ether groups in their entirety result in a particularly hydrophilic property of the chemical group X.
- the substances according to the formula (I) in the chemical group X also include therein a phosphate group.
- the active substance carrier in the form of a liposome which contains a cytostatic agent can also comprise at least one substance according to the formula (I *)
- the chemical group Y is a chemical group selected from the list consisting of biotin, protein, peptide, glyco group, nucleic acid, nucleoside or nucleotide and wherein X, n and m are the meanings as in Formulas! (I) or in the preferred variants described above.
- the chemical group Y is biotin in the preferred embodiment of the present invention.
- the Y chemical group is biotin
- it may be attached to the X chemical group by either an amide bond or via a carboxylic acid ester group.
- the chemical group Y may be attached to the chemical group X terminal or as
- the chemical group Y serves for the (bio) chemical identification.
- biotin according to the preferred embodiment (bio) chemically clear by streptavidin, can attach to this another chemical and / or biological group, the substance according to the formula (I *) more gives (bio-) chemical properties.
- an antibody conjugated to streptavidin can be bound to the biotin.
- only streptavidin can be bound to the biotin and an antibody conjugated to biotin can in turn be bound to the streptavidin. In both cases, this allows the drug carrier to accumulate preferentially over the selective action of the antibody to target molecules of the cells to be treated.
- this active substance carrier comprises a substance of the formula (I *) in which Y is biotin to which streptavidin is bound, to which in turn a biotin-conjugated antibody is bound.
- Particularly preferred active substance carriers are those comprising substances according to the formula (Ia)
- streptavidin is likewise preferably bound to the biotin of the substance according to the formula (Ia) to which in turn a biotin-conjugated antibody is bound.
- composition according to the invention usually comprises, in addition to the substances of the formulas (I), (I *) and / or (Ia), at least one further substance having at least one chemical group with lipophilic properties and at least one chemical Group with hydrophilic properties.
- further substances are preferably lipids.
- Such lipids are usually those from the class of phospholipids, in particular phosphatidylcholine and or phosphatidylethanolamine.
- Preferred lipids are those selected from the list consisting of La-phosphatidylcholine, 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine, ammonium (l, 2-dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-lisamine rhodamine B sulfonyl).
- the aforementioned further substances arrange themselves when introduced into a polar medium in the same way as the substances according to the formulas (I, I * and Ia).
- composition according to the invention comprising active substance carriers which comprise the abovementioned further substances usually contains these in a molar proportion of at least 50%, preferably of at least 70%, particularly preferably of 80 to 90%, based on the active ingredient carrier.
- the active substance carrier comprises two lipids as further substances.
- one of the two lipids is preferably L- ⁇ -phosphatidylcholine.
- the L- ⁇ -phosphatidylcholine is particularly preferably that L- ⁇ -phosphatidylcholine which can be obtained from eggs of chickens.
- the active substance carrier comprises a molar fraction of L- ⁇ -phosphatidylcholine of between 10 and 90% and a proportion of a substance of the formula (I, I * or Ia) relative to the active ingredient carrier.
- the active ingredient carrier consists of a molar fraction of La-phosphatidylcholine between 10 and 30%, a molar fraction of l, 2-dioleoyl-sn-glycero-3-phosphoethanolamin between 50 and 65% and a remaining proportion of a substance according to formulas (I, I * or Ia), so that a total of 100% molar fraction based on the active ingredient carrier is obtained.
- the active substance carriers contained in the composition according to the invention are liposomes which comprise what are known as lipid bilayers, the hydrophilic chemical groups X of the substances just described corresponding to the formulas (I), (I *) (Ia) which form part of these active compound carriers to the polar solvent, while the hydrophobic chemical groups of the substances according to the formulas (I), (I *) or the above-described lipids of both layers are oriented inside the lipid bilayer.
- the cytostatic agent contained in the composition according to the invention in the active substance carrier is preferably one which is soluble in water or aqueous media to a concentration of up to 3 mmol / l.
- cytostatics are those selected from the list consisting of doxorubicin, pemetrexed, melphalan, amsacrine, asparaginase, bevacizumab, bleomycin, busulfan, irinotecan, carmustine, daunorubicin, cisplatin, dactinomycin, gancyclovir, cytarabine, dacarbazine, cytarabine, vindesine, oxaliplatin, cyclophosphamide , Cetuximab, etoposide, epirubicin.
- Fludarabin 5 Fluorouracil, gemcitabine, trastuzumab, ifosfamide, topotecan, cladribine, alemtuzumab, rituximab, methotrexate, mitomycin, mitoxantrone, gemtuzumab, carbopiatin, aldesleukin, bendamustine hydrochloride, paclitaxel, docetaxel, thiotepa, arsenic trioxide, vinblastine, bortezomib, azacitidine, vincristine, vinorelbine, Cidofovir and idarubicin. Very particular preference is given to doxorubicin.
- Another object of the present invention is a method for releasing a cytostatic agent from a composition comprising a drug carrier in the form of a liposome, characterized in that amphiphilic substances according to the formula (I, I * and / or la) contained in the drug carrier of the composition their disulfide group are split into a hydrophobic and a hydrophilic portion.
- the cleavage according to the method of the invention may be an enzymatically catalyzed chemical cleavage or may be a non-enzymatically catalyzed reduction in which the disulfide group of the compounds of formula (I, I * and / or Ia) is cleaved as a result of their reduction.
- the cleavage is an enzymatically catalyzed cleavage.
- the enzyme which catalyzes such a chemical cleavage is preferably a thioreductase, thiooxidase, thiooxireductase or thidisulfide oxidoreductase.
- reducing agent a substance selected from the list consisting of glutathione, cysteine, tris (2-carboxyethyl) phosphine (TCEP), dithiothreithol (DTT) and 1, 4-dithioerythritol ( DTE) is used.
- TCEP 2,-carboxyethyl) phosphine
- DTT dithiothreithol
- DTE 4-dithioerythritol
- the reducing agent is tris (2-carboxyethyl) phosphine (TCEP).
- the abovementioned reducing agents may be advantageous because they usually have a reduction potential which is only sufficient to reduce at least one of the two sulfur atoms of the disulfide group of the compounds according to the formula (I, I * and / or Ia), thereby cleaving their bond.
- the reduction potential of the abovementioned reducing agents does not suffice to reduce other chemical groups of the substances according to the formula (I, I * and / or Ia) or groups of the further substances of the active substance carriers according to the invention in the form of a liposome.
- Glutathione and cysteine are substances which also occur in the body of mammals, in particular humans, on inflammatory changed parts in a particularly high concentration, whereby a targeted release is made possible here in particular with the present invention.
- the method according to the invention for the release of a cytostatic agent is based on the surprising finding that it is sufficient to cleave the cytostatic agent contained in the active substance carriers according to the formula (I, I * and / or Ia) into a hydrophilic part and a hydrophobic part, which without Being bound to a theory results in the liposome being destabilized to break up and release the drug contained in it.
- Another object is the use of the compositions described above as a medicament. Especially as a drug for the treatment of cancer.
- FIG. 1 shows a photograph of the cells obtained by means of differential interference contrast according to example 3.
- FIG. 2 shows a fluorescence micrograph of the same cells, as also shown in FIG.
- Example 1 Hersiellee egg ner composition of the invention comprising a drug carrier with a substance of formula (la)
- the substance according to the formula (Ia) was prepared according to Examples 1-4 of international application PCT / EP2010 / 064272.
- Table 1 Composition of the active ingredient carrier of the composition according to the invention
- the deposited film was taken up in cyclohexane (in admixture with 5% by volume of ethanol) and the resulting solution transferred to a glass tube which was frozen at -80 ° C and lyophilized overnight.
- aqueous doxorubicin hydrochloride solution (1 ml at a concentration of 0.5 mg ml) was added to the dry composition and the mixture was sonicated for 10 minutes.
- the resulting suspension was subjected to five freezing and thawing operations, each thawing using a 70 ° C water bath.
- 0.1 ml and after 5 minutes further 0.4 ml of aqueous doxorubicin solution (each with a concentration of 0.5 mg / ml) were added to the suspension.
- a final concentration of ⁇ 3 mmol / L doxorubicin! lydroch! orid can be achieved.
- composition according to the invention with doxorubicin hydrochloride as a cytostatic agent with a drug carrier comprising a substance according to formula (Ta) was obtained, wherein in the aforementioned aqueous solution unilamellar vesicles (drug carriers), which are loaded with doxorubicin hydrochloride, formed.
- an aqueous solution comprising the composition according to Example 1 and 25 ⁇ of an aqueous streptavidin solution (1 mg / ml) were added to a PBS (Phosphate buffered saline) buffer solution without calcium and magnesium ions, so that a total volume of 1 ml was achieved. This mixture was allowed to stand at room temperature for 30 minutes.
- PBS Phosphate buffered saline
- composition which comprises active substance carriers composed according to Example 1 comprising the cytostatic doxorubicin hydrochloride and wherein these active substance carriers have on their outer shell anti-human 85HER2 antibodies known to be specific to human pl 85HER2 proteins, located on the surface of human breast cancer cells, specifically.
- Example 3 Cell Culture Assays with Composition from Example 2
- Human breast cancer cells of the type BT -474 (DSMZ strain no. ACC 64) were cultured in a 12 ml cell culture flask as monolayer to a confluency of about 70%.
- the medium used was DM EM with 10% FBS, 5% penicillin-streptomycin and 2 niM I-glutamine.
- the cells were removed from the bottom of the culture flask with the aid of a 0.05% trypsin / EDTA solution and transferred to a 35 mm glass bottom flask (DM EM: 1: 4 dilution). The cells were incubated at 37 ° C and 5% C0 2 and treated with 1 ml of a PBS solution containing 25 ⁇ of the composition of Example 2.
- cytostatic doxorubicin hydrochloride Since the cytostatic doxorubicin hydrochloride is known to be fluorescence-active, it was thus possible to detect whether the cytostatic agent was released and absorbed by the cells.
- FIG. 2 again separately shows the selective fluorescence signal in the cells, wherein the bright spots illustrate the fluorescence signals of doxorubicin in the cells (as shown in FIG. 1 in differential interference contrast recording). These could be recognized in color as red-orange light emission. 1 shows a corresponding fluorescence signal in the interior of the cells in each cell, so that the uptake by the cells and thus the previous release of the doxorubicin hydrochloride is detected. Since no reducing agent was added to the cell culture, the release from the composition according to the invention was carried out solely by the presence of the cells.
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2013533183A JP2013539773A (ja) | 2010-10-12 | 2011-10-11 | 活性物質の制御放出によるがんを治療するための組成物 |
EP11773221.4A EP2627315A1 (de) | 2010-10-12 | 2011-10-11 | Zusammensetzung zur behandlung von krebs mit kontrollierter freisetzung des wirkstoffs |
US13/878,801 US20130266637A1 (en) | 2010-10-12 | 2011-10-11 | Composition for treating cancer by the controlled release of an active substance |
CA2814097A CA2814097A1 (en) | 2010-10-12 | 2011-10-11 | Composition for treating cancer by the controlled release of an active substance |
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DE102010042338A DE102010042338A1 (de) | 2010-10-12 | 2010-10-12 | Zusammensetzung zur Behandlung von Krebs mit kontrollierter Freisetzung des Wirkstoffes |
DE102010042338.6 | 2010-10-12 |
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WO2012049159A1 true WO2012049159A1 (de) | 2012-04-19 |
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US (1) | US20130266637A1 (de) |
EP (1) | EP2627315A1 (de) |
JP (1) | JP2013539773A (de) |
CA (1) | CA2814097A1 (de) |
DE (1) | DE102010042338A1 (de) |
WO (1) | WO2012049159A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2000059474A1 (en) | 1999-04-06 | 2000-10-12 | Isis Pharmaceuticals, Inc. | Fusogenic lipids and vesicles |
US20050271715A1 (en) * | 1999-04-23 | 2005-12-08 | Samuel Zalipsky | Conjugate having a cleavable linkage for use in a liposome |
WO2011039144A1 (de) * | 2009-09-29 | 2011-04-07 | Bayer Technology Services Gmbh | Disulfidgruppen enthaltende stoffe für selbstorganisierte träger zur kontrollierten freisetzung eines wirkstoffs |
-
2010
- 2010-10-12 DE DE102010042338A patent/DE102010042338A1/de not_active Withdrawn
-
2011
- 2011-10-11 US US13/878,801 patent/US20130266637A1/en not_active Abandoned
- 2011-10-11 WO PCT/EP2011/067702 patent/WO2012049159A1/de active Application Filing
- 2011-10-11 CA CA2814097A patent/CA2814097A1/en not_active Abandoned
- 2011-10-11 JP JP2013533183A patent/JP2013539773A/ja active Pending
- 2011-10-11 EP EP11773221.4A patent/EP2627315A1/de not_active Withdrawn
Patent Citations (3)
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WO2000059474A1 (en) | 1999-04-06 | 2000-10-12 | Isis Pharmaceuticals, Inc. | Fusogenic lipids and vesicles |
US20050271715A1 (en) * | 1999-04-23 | 2005-12-08 | Samuel Zalipsky | Conjugate having a cleavable linkage for use in a liposome |
WO2011039144A1 (de) * | 2009-09-29 | 2011-04-07 | Bayer Technology Services Gmbh | Disulfidgruppen enthaltende stoffe für selbstorganisierte träger zur kontrollierten freisetzung eines wirkstoffs |
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GOLDENBOGEN, BJORN ET AL: "Reduction-sensitive liposomes from a multifunctional lipid conjugate and natural phospholipids: Reduction and release kinetics and cellular uptake", LANGMUIR , 27(17), 10820-10829 CODEN: LANGD5; ISSN: 0743-7463, 2011, XP002665631 * |
J. DAVIDSEN ET AL.: "Secreted phospholipase A2 as a new enzymatic trigger mechanism for localised liposomal drug release and absorption in diseased tissue", BIOCHIMICA ET BIOPHYSICA ACTA, vol. 1609, 2003, pages 95 - 101, XP004400950, DOI: doi:10.1016/S0005-2736(02)00659-4 |
MENG F ET AL: "Reduction-sensitive polymers and bioconjugates for biomedical applications", BIOMATERIALS, ELSEVIER SCIENCE PUBLISHERS BV., BARKING, GB, vol. 30, no. 12, 1 April 2009 (2009-04-01), pages 2180 - 2198, XP025990543, ISSN: 0142-9612, [retrieved on 20090205], DOI: 10.1016/J.BIOMATERIALS.2009.01.026 * |
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Also Published As
Publication number | Publication date |
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EP2627315A1 (de) | 2013-08-21 |
US20130266637A1 (en) | 2013-10-10 |
DE102010042338A1 (de) | 2012-04-12 |
JP2013539773A (ja) | 2013-10-28 |
CA2814097A1 (en) | 2012-04-19 |
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