USRE42014E1 - Pharmaceutical compositions - Google Patents

Pharmaceutical compositions Download PDF

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USRE42014E1
USRE42014E1 US10/345,665 US34566597A USRE42014E US RE42014 E1 USRE42014 E1 US RE42014E1 US 34566597 A US34566597 A US 34566597A US RE42014 E USRE42014 E US RE42014E
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emulsion
concentrate
stabiliser
active agent
fat
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Harry Tiemessen
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Novartis AG
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    • A61K47/06—Organic compounds, e.g. natural or synthetic hydrocarbons, polyolefins, mineral oil, petrolatum or ozokerite
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    • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
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Definitions

  • This invention relates to a pharmaceutical composition having as active ingredient a cyclosporin, a cyclosporin derivative that is useful in the treatment of multi-drug resistance syndrome, or a macrolide e.g. a rapamycin or an ascomycin.
  • this invention relates to a pharmaceutical composition containing [3′-desoxy-3′-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin (PSC 833) as active ingredient.
  • tumour cells The resistance of tumour cells to chemotherapeutics is a major factor in the failure of chemotherapy.
  • One form of resistance to chemotherapeutics is “multi-drug resistance” where the tumour cells become cross-resistant to a variety of chemotherapeutics; for example alkaloids, anthracyclines, actinomycin D, adriamycin and colchicine.
  • Multi-drug resistance syndrome has been correlated in many reports with the overexpression of transmembrane glycoproteins called P-glycoproteins (Pgp).
  • Cyclosporins have been found to reverse multi-drug resistance syndrome and [3′-desoxy-3′-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin in particular has been found to be effective. [3′-desoxy-3′-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin and its utility is described in European patent publication No. 296 122.
  • the cyclosporins comprise a class of structurally distinctive, cyclic, poly-N-methylated undecapeptides, generally possessing pharmacological, in particular immunosuppressive, anti-inflammatory and/or anti-parasitic activity, each to a greater or lesser degree. Cyclosporins are generally not readily soluble in aqueous media. Consequently, it is difficult to develop pharmaceutically acceptable carriers which allow delivery of the drug in sufficiently high concentrations to permit convenient use and which allow efficient and consistent absorption of the drug by the body. Often individual cyclosporins present very specific problems in relation to their administration and, in particular, in providing galenic formulations. Species specific problems also arise with regard to drug bioavailability. This is particularly the case with the compound [3′-desoxy-3′-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin which presents very special problems in relation to its incorporation in galenic formulations.
  • British patent application 2222770 A discloses galenic formulations, containing cyclosporins, that are in the form of microemulsions or microemulsion preconcentrates. These formulations comprise a hydrophilic phase, a lipophilic phase and a surfactant. The following components are described as suitable for the hydrophilic phase: Transcutol, Glycofurol and 1,2-propylene glycol. Medium chain fatty acid triglycerides are disclosed as being suitable for the lipophilic phase. Reaction products of natural or hydrogenated vegetable oils and ethylene glycol are given as surfactants.
  • Rapamycin is an immunosuppressive lactam macrolide produceable, for example by Streptomyces hygroscopicus.
  • the structure of rapamycin is given in Kesseler, H., et al.; 1993; Helv. Chim. Acta; 76: 117.
  • Rapamycin is an extremely potent immunosuppressant and has also been shown to have antitumor and antifungal activity. Its utility as a pharmaceutical, however, is restricted by its very low and variable bioavailability.
  • rapamycin is highly insoluble in aqueous media, e.g. water, making it difficult to formulate stable galenic compositions. Numerous derivatives of rapamycin are known.
  • rapamycins are disclosed in WO 94/02136, the contents of which are incorporated herein by reference.
  • 40-O-substituted rapamycins are described in, e.g., in U.S. Pat. No. 5,258,389 and WO 94/09010 (O-aryl and O-alkyl rapamycins); WO 92/05179 (carboxylic acid esters), U.S. Pat. No. 5,118,677 (amide esters), U.S. Pat. No. 5,118,678 (carbamates), U.S. Pat. No. 5,100,883 (fluorinated esters), U.S. Pat. No.
  • rapamycin derivatives are described in PCT application number EP96/02441, for example 32-deoxorapamycin as described in Example 1, and 16-pent-2-ynyloxy-32(S)-dihydrorapamycin as described in Examples 2 and 3.
  • the contents of PCT application number EP96/02441 are incorporated herein by reference.
  • rapamycin used in the compositions of this invention may be any rapamycin or derivative thereof, for example as disclosed above or in the above-mentioned patent applications.
  • the rapamycin used in the compositions of this invention may be rapamycin or an O-substituted derivative in which the hydroxyl group on the cyclohexyl ring of rapamycin is replaced by —OR 1 in which R 1 is hydroxyalkyl, hydroxyalkoxyalkyl, acylaminoalkyl and aminoalkyl; e.g. as described in WO94/09010, for example 40-O-(2-hydroxy)ethyl-rapamycin, 40-O-(3-hydroxy)propyl-rapamycin, 40-O-[2-(2-hydroxy)ethoxy]ethyl-rapamycin and 40-O-(2-acetaminoethyl)-rapamycin.
  • the rapamycin derivative may be a 26- or 28-substituted derivative.
  • Preferred rapamycins for use in the compositions of this invention include rapamycin, 40-O-(2-hydroxy)ethyl rapamycin, 32-deoxorapamycin and 16-pent-2-ynyloxy-32 (S)-dihydrorapamycin.
  • a more preferred rapamycin is 40-O-(2-hydroxy)ethyl rapamycin.
  • Numbering of rapamycin derivatives as used herein refers to the structure disclosed as Formula A at page 4 of published PCT application WO 96/13273, the contents of which are incorporated herein by reference.
  • Ascomycins of which FK-506 and ascomycin are the best known, comprise another class of lactam macrolides, many of which have potent immunosuppressive and anti-inflammatory activity.
  • FK506 is a lactam macrolide immunosuppressant that is produced by Streptomyces tsukubaensis No 9993. The structure of FK506 is given in the appendix to the Merck Index, 11th ed. (1989) as item A5. Ascomycin is described, e.g., in U.S. Pat. No. 3,244,592.
  • ascomycin and FK-506 have been synthesized, including halogenated derivatives such as 33-epi-chloro-33-desoxy-ascomycin described in EP 427 680. Ascomycin, FK-506 and their structurally similar analogues and derivatives are termed collectively “ascomycins”.
  • Examples of compounds of the ascomycin or FK 506 class are those mentioned above. They include for example FK 506, ascomycin and other naturally occurring compounds. They include also synthetic analogues.
  • a preferred compound of the FK 506 class for use as active ingredient in the present invention is disclosed in EP 427 680, e.g. Example 66a also known as 33-epi-chloro-33-desoxy-ascomycin.
  • Other preferred compounds are disclosed in EP 465 426, and in EP 569 337, e.g. the compound disclosed under Example 6d and Example 71 in EP 569 337.
  • Other preferred compounds include tetrahydropyran derivatives as disclosed in EP 626 385, e.g. the compound disclosed under Example 8 in EP 626 385.
  • FIG. 1 is a graphical representation of the mean blood levels of cyclosporin PSC 833 in dogs as a function of time, as determined by radioimmunoassay.
  • this invention provides an intravenously or orally applicable, drug compound containing pharmaceutical fat emulsion in water, prepared by mixing a solution of a drug compound and a stabilizer with a placebo fat emulsion, the emulsion being filtrable up to 2 days through a Nuclepore R filter having a pore diameter of 0.2 micrometer without filtration residue and its fat droplets containing 0.1 to 20 percent of weight of a cyclosporin as the drug compound, related to the weight of the fat, and having a diameter of up to 500 nanometer.
  • this invention provides a process for preparing an emulsion composition comprising a cyclosporin, a rapamycin or an ascomycin or a derivative thereof as active agent, which process comprises the step of admixing to a placebo fat emulsion a concentrate comprising
  • Admixing may be carried out conveniently by injection of the concentrate into the placebo fat emulsion.
  • composition provides a surprisingly high bioavailability and hence the dosage of active ingredient, e.g. [3′-desoxy-3′-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin required to be delivered can be decreased.
  • the composition is also convenient to use and permits efficient and consistent absorption of [3′-desoxy-3′-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin by the body.
  • the composition is particularly effective in treating multiple drug resistance syndrome in, for example, cancer patients undergoing chemotherapy.
  • the mean fat droplet size is between about 250 nm to 500 nm.
  • Solid material having a dimension e.g. diameter >200 nm, e.g. undissolved drug compound (active agent) is collected and retained by the filter pores.
  • the fat droplets are flexible, however, and pass through the filter pores.
  • the mean diameter of the droplets in the fat emulsion compositions of this invention is substantially similar to the droplet diameter in the placebo emulsion.
  • a “Nucleopore” filter is an example of a high-quality filter available commercially.
  • Placebo fat emulsion is understood to mean a fat emulsion without active agent. Placebo fat emulsions can be prepared by known methods and are available commercially, e.g. under the trade marks Intralipid or Lipofundin.
  • a “pharmaceutical emulsion” is understood herein as a composition in which the individual components or ingredients are themselves pharmaceutically acceptable and, when a particular form of administration is foreseen, are suitable or acceptable for that form of administration.
  • the emulsion contains 1-30, preferably 8 to 20, particularly 10 to 20 and especially 10 to 16 percent by weight of fat.
  • intravenous administration of cyclosporins or macrolides is especially of interest, since particularly immediately after organ transplantations or in conjunction with chemotherapy oral administration may not be possible.
  • cyclosporins are insoluble in an aqueous medium, they are typically dissolved in a mixture of alcohol and poly(oxyethylene)40-castor oil in order to enable intravenous administration, and just before use diluted with brine or a glucose solution and slowly infused.
  • cyclosporin A is merely available as a concentrate (Sandimmune R —infusion—concentrate) with alcohol and poly(oxyethylene)40-castor oil, which are not ideal excipients.
  • Poly(oxyethlyene)40-castor oil in injection and infusion solutions may lead to hypersensitivity reactions especially in people with allergic symptoms or in people, who shortly before have had a comparable composition with the same excipient by injection or infusion. Hypersensitivity reactions may include lowering of blood pressure, deficient blood circulation or lack of air. On longer-term use an increase of blood fat values with pathological shift of lipoprotein profile, prejudiced flowing properties of the blood and increased aggregation readiness may occur.
  • Poly(oxyethlyene)40-castor oil, e.g. Cremophor R EL—, a non-ionic emulsifier is not a natural oil and is—in contradiction to them—soluble in water.
  • cyclosporin containing injection or infusion solution which does not contain poly(oxyethylene)40-castor oil and which contains the active ingredient, e.g. cyclosporin, in amounts sufficient for a therapeutic effect and which is patient-compatible and without the side effects described above.
  • a cyclosporin- or macrolide-containing injection or infusion solution in which the cyclosporin or macrolide is present in a concentration which provides therapeutical efficacy in an intravenously applicable mixture with natural excipients.
  • a cyclosporin concentrate is described, which is a sterile solution of cyclosporin in a mixture of alcohol and a plant-oil. This composition however is not suitable for injection, since the injection of an oil in this concentrated form may cause a lethal embolism.
  • cyclosporins are soluble in natural oils, it would be obvious to dissolve them simply in fat emulsions available commercially, e.g. in Intralipid R , by addition of crystalline cyclosporin. This however is not realisable, since even after intensive stirring, a predominating amount remains present in the form of undissolved crystals.
  • a loading up of the fat droplets in the aqueous fat emulsion is hardly possible and the final result is an emulsion having an amount of cyclosporin dissolved which is insufficient for a therapeutically suitable effect and additionally contains solid cyclosporin crystal particles which may be of a dangerously large size for intravenous injection or infusion.
  • PSC 833 which is more lipophilic than other cyclosporins.
  • PSC 833 is the preferred cyclosporin compound in the emulsion of the invention.
  • the fat used in the placebo fat emulsion is preferably an acylglycerol or an acylglyerol having a (C 8-22 )-1-alkylether or -1- ⁇ , ⁇ -alkenylether group in position 1 of the glycerol part. (See Albert. L. Lehninger, Biochemie, Edition Chemie, Weinheim, New York 1979 page 230).
  • the amount of fat used in the emulsion is preferably 1-30, particularly 8-20% by weight.
  • the acylglycerol is without an ether group and if so, especially a di- and/or triacylglycerol having (C 8-22 ) fatty acid chains, particularly a di- and/or triacylglycerol mixture having a (C 8-12 ) fraction and a (C 18-22 ) fraction of fatty acid chains.
  • fatty acid chains preferably 40-60, more preferably 45-55% by weight is unsaturated.
  • a particularly suitable fat is soybean oil.
  • Ready made fat emulsions, suitable as a component for the fat emulsion of the invention include commercially available products like Lipofundin 10% MCT, or Intralipid of Kabi, or Abbolipid.
  • Lipofundin MCT contains as an oil phase a 1:1 mixture of long chain triglycerides (LCT) and medium chain triglycerides (MCT, Miglyol 810 or 812, preponderantly consisting of caprylic/capric triglyceride).
  • LCT long chain triglycerides
  • MCT medium chain triglycerides
  • MCT Miglyol 810 or 812, preponderantly consisting of caprylic/capric triglyceride
  • the placebo fat emulsion contains preferably an emulsifier, which is particularly a positively or negatively charged or a polar tenside having (C 12-22 ) saturated or mono- or di-unsaturated alkyl groups, especially an electrically charged phosphatide, being no zwitterion, preferably a negatively charged phosphatide.
  • an emulsifier which is particularly a positively or negatively charged or a polar tenside having (C 12-22 ) saturated or mono- or di-unsaturated alkyl groups, especially an electrically charged phosphatide, being no zwitterion, preferably a negatively charged phosphatide.
  • the emulsifier is preferably present in an amount of 0.4 to 3% by weight related to the emulsion weight.
  • a good representative of a suitable emulsifier is soya- or egg-lecithin. It contains apart from its preponderant component phosphatidylcholine with a zwitterion structure also other, negatively charged and polar components.
  • a polar tenside e.g. a poloxamer
  • a natural surface active agent is preferred, e.g. a lecithin.
  • the drug-loaded fat emulsion of this invention further contains a stabiliser preferably a phospholipid or such one having a (C 12-22 )-1-alkylether or -1- ⁇ , ⁇ -alkenyl-ether group in position 1 (see for such special structures: Karlson, Doenecke and Koolman, Kurzes Lehrbuch der Biochemie f ür Mediziner und Naturwissenschaftler, 1994, page 306, FIG. 13.2, a plasmanyl—or plasmenylethanol amnine).
  • a stabiliser preferably a phospholipid or such one having a (C 12-22 )-1-alkylether or -1- ⁇ , ⁇ -alkenyl-ether group in position 1
  • a glycolipid (see also Karlson, page 289, the table and page 303), a compound with a mono- or oligo-saccharide moiety instead of a phosphate variety, especially a sphingolipid (page 303, 308), e.g. sphingomyelin (page 308, 309) is also contemplated as stabiliser.
  • a phospholipid which is negatively charged
  • a diacylphosphatidyl glycerol especially such one having an unsaturated (C 12-22 ) fatty acid moiety, e.g. palmitoyl oleoyl phosphatidylglycerol (hereafter POPG), egg-phosphatidylglycerol, soy-phosphatidylglycerol, or diacyl-phosphatidylglycerol, or a salt thereof, e.g. sodium-, potassium- or ammonium-POPG, more preferably NaPOPG.
  • POPG palmitoyl oleoyl phosphatidylglycerol
  • POPG palmitoyl oleoyl phosphatidylglycerol
  • egg-phosphatidylglycerol soy-phosphatidylglycerol
  • diacyl-phosphatidylglycerol or a salt thereof, e.g. sodium-,
  • Another preferred stabiliser is a saturated, mono- or di-unsaturated (C 12-24 ) fatty acid, especially oleic acid, or a salt thereof e.g. sodium, potassium or ammonium oleate, more preferably sodium oleate.
  • the stabiliser used in the present invention serves to increase the concentration of active agent in the ready-to-use fat emulsion, and to increase the rate of formation of the emulsion.
  • the active agent is incorporated stably and rapidly within the fat droplets of the placebo fat emulsion.
  • the ready-to-use emulsion may be formed rapidly, e.g. in less than or about 1 second or in a few seconds.
  • the stabiliser in the compositions of this invention provides at least a two-fold, e.g. a three-fold, four-fold, five-fold or higher multiple increase of solubilisation of active agent in fat droplets of the placebo fat emulsion when compared with a simple mixture of active agent with placebo fat emulsion.
  • a concentration of at least about 5 mg PSC 833 per ml fat emulsion and up to about 20 mg/ml may be obtained.
  • a concentration of active agent of at least about 3 mmol/liter fat emulsion e.g. 4 mmol/liter, 5 mmol/liter or more and up to about 20 mmol/liter may be obtained.
  • the drug compound containing fat emulsion additionally contains, for a larger drug compound load, an organic solvent, e.g. polyethylene glycol, e.g. polyethylene glycol 300 or 400.
  • organic solvent e.g. polyethylene glycol, e.g. polyethylene glycol 300 or 400.
  • Ethanol and propylene glycol are also possible, e.g. in a 1:99 to 99:1 weight mixture, e.g. 25:75 to 75:25, and preferably a mixture of about 45:55 to 55:45, e.g. a 50:50 weight mixture of ethanol and propylene glycol is used, thereby recognising the good dissolving efficacy of ethanol and the undesirability of a greater alcohol concentration in the blood after administration of the emulsion.
  • this invention provides a pharmaceutical concentrate containing a cyclosporin or macrolide, e.g. a rapamycin or an ascomycin or derivative thereof, as drug compound and a stabiliser in a weight ratio of drug compound to stabiliser of from 400:1 to 0.5:1, e.g. 200:1 to 1: 1, preferably from 100:1 to 1:1, more preferably from 100: 1 to 10: 1, e.g. 50:1, 40:1, 30:1, 20:1 or 10:1, as a component for the fat emulsion of the invention.
  • a cyclosporin or macrolide e.g. a rapamycin or an ascomycin or derivative thereof
  • a stabiliser in a weight ratio of drug compound to stabiliser of from 400:1 to 0.5:1, e.g. 200:1 to 1: 1, preferably from 100:1 to 1:1, more preferably from 100: 1 to 10: 1, e.g. 50:1, 40:1, 30:1, 20:1 or 10:1, as a component
  • this invention provides the use of a stabiliser as described herein in increasing the concentration in a ready-to-use fat emulsion of a cyclosporin, a rapamycin or an ascomycin or derivative thereof as active agent as described herein over the concentration obtainable with a placebo fat emulsion and/or accelerating formation of the ready-to-use emulsion.
  • this invention provides a method for increasing the concentration in a ready-to-use fat emulsion of a cyclosporin, a rapamycin or an ascomycin or derivative thereof as active agent as described herein over the concentration obtainable with a placebo fat emulsion and/or accelerating formation of the ready-to-use emulsion by use of a stabiliser as described herein.
  • a product of about the same formation is generally known from UK Patent GB 2 269 536 B, but not as a starting product for incorporating into a fat emulsion.
  • product disclosed in GB 2 269 536 through a 200 nm pore filter, all product containing active agent, e.g. peptide, is retained on the filter.
  • the concentrate of this invention is present in an organic solvent in an amount of up to 20%, e.g. 0.1 to 20% by weight of the drug compound related to the concentrate weight, which solvent makes the concentrate at least intravenously applicable.
  • the stabiliser in the concentrate of this invention may be the phospholipid, the glycolipid or the fatty acid, if present, in the placebo fat emulsion.
  • the cyclosporin used in the concentrate may be cyclosporin A or PSC 833, and is preferably PSC 833.
  • Preferred rapamycins and ascomycins are as described above.
  • the concentrate is prepared by mixing the drug compound and the stabiliser in an organic solvent, preferably a solvent which is also present in the drug compound containing fat emulsion described above, until complete dissolution is reached.
  • the concentrate may be in liquid or in solid form.
  • the solid form may be obtained by removing the organic solvent used in the production. If ethanol is used, it may be removed by evaporation, e.g. by freeze- or spray-drying.
  • organic solvent is understood herein to include a single component organic solvent or a mixture of two or more organic solvents.
  • the drug containing fat emulsion is prepared by mixing, preferably by injecting, the concentrate, whether in liquid or in solid form, preferably in liquid form (to facilitate the incorporation of the drug compound and stabilizer into the dissolved fat droplets) into the placebo fat emulsion, after which the drug containing fat emulsion, preferably up to 24 hours after its preparation may be administered to a patient.
  • the concentrate solution and the placebo fat emulsion may be stored in separate ampoules and are stable under normal conditions for a long period e.g. months or years.
  • this invention thus provides an emulsion for intravenous administration of [3′-desoxy-3-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin as active agent comprising
  • this invention provides a process for preparing an emulsion for intravenous administration of [3′-desoxy-3-oxo-MeBmt] 1 -[Val] 2 -Ciclosporin as active agent which process comprises the step of admixing to a placebo fat emulsion a concentrate comprising
  • the invention thus also provides a set of ampoules containing the concentrate and bottles containing a placebo fat emulsion, suitable for mixing their contents in proportions which meet the needs of a patient concerning the required amount of drug compound in a pharmaceutically safe particle size.
  • the applicants contemplate oral administration of a concentrate or emulsion of this invention, e.g. in a flavoured drink solution or milk; nasal administration; via inhalation; or topically, e.g. dermally.
  • the pharmaceutical cyclosporin or macrolide-containing fat emulsions are used for the same indications as known formulations for the respective cyclosporin or macrolide and in the same manner.
  • the exact dosage to be used may be determined in conventional manner, e.g. in standard bioavailability tests in animals, e.g. dogs. In general the dosages are from about 100% to 200% that of known formulations.
  • compositions of this invention are useful for the known indications of the cyclosporin, or macrolide e.g. rapamycin, e.g. for the following conditions:
  • compositions of the ascomycin, FK506 or ascomycin derivatives disclosed herein are useful, for example, in the treatment of inflammatory and hyperproliferative skin diseases and of cutaneous manifestations of immunologically-mediated diseases. More specifically, the compositions of this invention are useful as antiinflammatory and as immunosuppressant and antiproliferative agents for use in the prevention and treatment of inflammatory conditions and of conditions requiring immunosuppression, such as
  • compositions to be administered depends on several factors, for example the desired duration of treatment and the rate of release of the active ingredient.
  • the utility of the pharmaceutical compositions can be observed in standard clinical tests in, for example, known indications of active agent dosages giving equivalent blood levels of active agent; for example using dosages in the range of 1 mg to 1000 mg, e.g. 5 mg to 100 mg, of active agent per day for a 75 kilogram adult and in standard animal models.
  • the increased bioavailability of the drug substance provided by the compositions can be observed in standard animal tests and in clinical trials. For example an indicated adult daily dose following renal transplantation is from 50 to 200 mg/day.
  • Example 1 The concentrate of Example 1 my be introduced into Lipofundin ® MCT 10%, a placebo fat emulsion, e.g. by injection at a dilution factor of about 17, giving the following composition:
  • a patient of 70 kg of body weight thus needs about 1400 mg PSC 833 for oral use, in a fat emulsion, which may be prepared by mixing of 14 ml of the concentrate of Example 1 with 100 ml or more of Lipofundin R 10% MCT.
  • the required amount of drug solution may be taken from a 5 ml ampoule containing 500 mg of PSC 833 concentrate and/or of a 2.5 mg ampoule containing 250 mg PSC A-833 and may be introduced by injection into 100 ml of Lipofundin R MCT 10% whereafter the combined mixture may be administered to a patient by infusion or oral application.
  • Composition 3 to 7 and 8 to 12 are those according to the invention
  • Non solubilized PSC 833 Mixtures recovered on the 0.2 micron with weight ratio filter (time-point of filtration) as of compounds wt-% of initial amount 1 1 PSC833/EtOH-90 # 10/90 + 13% (30 min) 20 Intralipid 10% 2 1 PSC 833/oleic acid/EtOH-90 # 20% (5 min), 12.3% (30 min) 10/1/89 + 20 Intralipid 10% 3 1 PSC 833/POPG.Na/EtOH-90 # 0.6% (3 min), 0.2% (6 min) 10/1/89 + 20 Intralipid 10% 0.06% (15 min, 24 hours, 12 days at RT) 4 1 PSC 833/Na.OL/EtOH-90 # 0.05% (5 min) 10/1/89 + 20 Intralipid 10% 5 1 PSC 833/NaOL/PG/Et
  • the mean particle size (250 mm) and the particle size distribution (unimodal distribution, all particles smaller than 500 mm) were determined by photon correlation spectroscopy.
  • compositions 13a and 13b duration 2 hours
  • 13c duration 2 hours
  • RIA radioimmunoassay
  • Concentration in blood of active agent (PSC 833 abbreviated “PSC”) is plotted on a log scale on the vertical axis. Time in hours after commencement of administration is plotted on the horizontal axis. As is apparent from the gradient of each graph in FIG. 1 , no significant differences in elimination kinetics between the 3 forms are observed. The gradient of each graph appears similar one with another from about 2 hours, i.e. end of infusion. Surprisingly there appears to be no significant influence of the fat-emulsion on the elimination kinetics the lipophilic compound PSC. Elimination kinetics of the injectable forms appear similar to those of the oral form.
  • Fat emulsions are prepared using as active agent the compound (compound A) disclosed in Examples 6d and 71 of published European patent application EP 569337.
  • Composition 14a is according to the invention
  • Analogous compositions are prepared to compositions 3 to 12 above for other active agents by replacing the active agent PSC by 40-O-(2-hydroxy)ethyl rapamycin (Examples 15 to 24), 32-deoxorapamycin (Examples 25 to 34), 16-pent-2-ynyloxy-32(S)-dihydrorapamycin (Examples 35 to 44), and 33-epi-chloro-33-desoxy-ascomycin (Examples 45 to 54).
  • Stable emulsion compositions are obtained rapidly on admixing, by injection, the respective active agent concentrate into placebo fat emulsion.
  • compositions which, to a certain extent, are comparable with the drug compound containing fat emulsions of the invention and with the concentrates are described in the literature:
  • an intravenously applicable fat emulsion which contains a cyclosporin, a natural oil, a phosphatidyl choline, a phosphatidylethanolamine and water, plus—optionally—an alkali salt of a fatty acid.
  • an emulsion containing 4 percent of weight of a cyclosporin related to the oil weight is prepared by dissolution of the cyclosporin in the oil phase and subsequent emulsification in the water phase which contains all other excipients mentioned above.
  • a disadvantage of the fat emulsion is that if higher cyclosporin concentrations are strived for, only a part of the cyclosporin amount is dissolved. The other part is present in solid form in the inner part of the fat particle (see page 4, lines 41-46).
  • Example 5 The composition of Example 5 is filtered through a filter, having a pore diameter of 5 microns (see page 5, line 38).
  • the particle size of solid particles which may be present (see page 8, table) is therefore allowed to be larger than the particle size of the composition of the instant invention, which particles without filtration residue are filtered through a filter having a pore diameter of 0.2 micrometer.
  • the intravenously applicability of the emulsions of EP 0570829 A1 is thus not without any danger.
  • a further disadvantage is particularly that when higher drug loading of the oil phase is strived for, the drug compound tends to precipitate during storage for more than 3 months.
  • EP 0331755 B1 a drug compound containing fat emulsion is described which in contrast to the compositions of the present invention, contains no POPG.Na, sodium oleate or other stabilizers, which makes it impossible to prepare cyclosporins incorporated at a satisfactory percentage in the fat droplets, without having a certain percentage present in the water phase due to precipitation before incorporation into the fat droplets.
  • the fat emulsion thus may, just as the emulsion described before, contain particles which can not be administered without any potential danger, especially if the emulsion has a larger drug loading concentration.
  • Derwent Abstract 92-352740 (JP 042253907-A) is related to a fat emulsion containing a cyclosporin as the drug compound, a phosphatidyl choline (lecithin), sodium oleate, soybean oil, glycerol and water and is meant for intravenous application.
  • the fat emulsion contains 0.2% of weight of the cyclosporin related to the emulsion weight and 2% of cyclosporin related to the fat, e.g. soybean oil.
  • a fat emulsion is available, which has, with a comparable amount of drug compound, an excipient load related to the fat amount, of one tenth of that in hitherto known compositions.
  • the fat emulsion of the art is produced starting from all the different components, which are mixed in a homogenizer under high pressure. Since it is produced in one step, it is comparable with the emulsion of EP 0570829 A1, described before and has the same disadvantage of lending to exhibit precipitation of active ingredient.
  • composition of the present invention has the advantage of being safe, is prepared shortly before administration, e.g. a few minutes or about one hour, and is formulated by mixing two separate units, i.e. concentrate and placebo fat emulsion which each are stable for long periods, particularly in ampoules, and which can be simply mixed by injection of the concentrate into the fat emulsion without using an homogenizer.
  • Amphotericin is transformed into a water soluble complex, with a phosphatidyl glycerol in an acid medium, optionally in the presence of phosphatidyl choline and of cholesterol.
  • the molar ratio is 0.4 parts of Amphotericin: 0.8 parts of distearoyl phosphatidyl glycerol: 2.0 parts of hydrogenated egg phosphatidyl choline: 1.0 parts of cholesterol (see page 7, table and also claim 7 ).
  • the pH is 4.5.
  • the amounts of excipients are so large that upon addition of an aqueous phase to this pharmaceutical intermediate, liposomes (see page 2, line 5) are formed which incorporate the drug compound.
  • the pH is preferably not in the acid range.
  • liposomes are produced which may be stabilized by lyophilization to guaranteee an adequate shelf life.
  • colloidal particles of the drug compound cyclosporin A which is very poorly soluble in water, together with a stabilizer are prepared in a weight ratio of active substance: stabilizer of 2:1 and with diameters of about 1.0 micrometers and thus lie inside the drug compound: stabilizer weight ratio of the concentrate used as a component for the fat emulsion according to the invention.
  • a solution of the cyclosporin and the stabilizer in absolute ethanol and polyethylene glycol 400 is injected in dextrose containing water leading to a suspension of stabilized colloidal particles and not, as according to the present invention, into a fat emulsion.
  • the stabilizer consisting of phosphatidyl-choline does not have electrostatically stabilizing activity, since it is a zwitterion.
  • the stabilizer contains a portion of insoluble phospholipids which become charged in the

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