EP0858331A1 - Concentres spontanement dispersibles d'esters de sterols et de derives de vitamine d a effet antiviral, virucide et/ou parasiticide - Google Patents

Concentres spontanement dispersibles d'esters de sterols et de derives de vitamine d a effet antiviral, virucide et/ou parasiticide

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Publication number
EP0858331A1
EP0858331A1 EP96925634A EP96925634A EP0858331A1 EP 0858331 A1 EP0858331 A1 EP 0858331A1 EP 96925634 A EP96925634 A EP 96925634A EP 96925634 A EP96925634 A EP 96925634A EP 0858331 A1 EP0858331 A1 EP 0858331A1
Authority
EP
European Patent Office
Prior art keywords
weight
sitosteryl
vii
concentrate according
spontaneously dispersible
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96925634A
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German (de)
English (en)
Inventor
Carl Eugster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marigen SA
Original Assignee
Marigen SA
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Filing date
Publication date
Application filed by Marigen SA filed Critical Marigen SA
Publication of EP0858331A1 publication Critical patent/EP0858331A1/fr
Withdrawn legal-status Critical Current

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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
    • A61K9/4816—Wall or shell material
    • 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
    • A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
    • A61K31/565—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids not substituted in position 17 beta by a carbon atom, e.g. estrane, estradiol
    • 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
    • A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
    • A61K31/575—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids substituted in position 17 beta by a chain of three or more carbon atoms, e.g. cholane, cholestane, ergosterol, sitosterol
    • 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
    • A61K31/59—Compounds containing 9, 10- seco- cyclopenta[a]hydrophenanthrene ring systems
    • 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
    • A61K9/10—Dispersions; Emulsions
    • A61K9/107—Emulsions ; Emulsion preconcentrates; Micelles
    • A61K9/1075—Microemulsions or submicron emulsions; Preconcentrates or solids thereof; Micelles, e.g. made of phospholipids or block copolymers
    • 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
    • A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
    • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
    • A61K9/1605—Excipients; Inactive ingredients
    • A61K9/1629—Organic macromolecular compounds
    • A61K9/1652—Polysaccharides, e.g. alginate, cellulose derivatives; Cyclodextrin

Definitions

  • the present invention relates to spontaneously dispersible concentrates with esters of sterols and vitamin D compounds and ultramicroemulsions prepared therefrom for the production of medicaments with antiviral, virucidal and / or antiparasitic activity
  • ester compounds also have excellent antiviral or directly virucidal and antiparasitic activity, in particular against trypanosomes.
  • the therapeutic properties of these selected esters occur more when they optimally solubilize, i.e. incorporated into spontaneously dispersible concentrates and then diluted with distilled water or 5% glucose solution or physiological saline solution (Ringer's solution), resulting in thermodynamically stable ultramicroemulsions with micelles which have a very small hydrodynamic radius of only 2.2 to 3.0 nm
  • Preferred compounds of the formulas (I) to (V) are those in which R 1 is a C2. 21 alkyl, a C 3 - 2 i-alkenyl, a C. 3 2 -alkapolyene group or a group of the formula (VIII) •
  • An outstanding antiviral / virucidal, or antiparasitic activity are compounds of the formulas (I), (II), (III) or (IV) wherein R is a C 10 - Group 2 ⁇ alkyl, a C 10 7 .i - alkenyl, a C 10 - 17 -Alkapolyenement or Retinoyl distr.
  • R is a C 10 - Group 2 ⁇ alkyl, a C 10 7 .i - alkenyl, a C 10 - 17 -Alkapolyenement or Retinoyl distr.
  • Examples of compounds according to formulas (I) to (VII) include: trans-2-butenoic acid-3
  • Palmitic acid 3 i-hydroxy-5 ⁇ -cholestanyl ester (cholestanyl palmitate)
  • 3p-stigmast-5-en-3-all trans-retinate (ß-sitosteryl-all-trans-retinate).
  • the selected sterol esters and esters of vitamin D compounds of the formulas (I) to (VII) are almost water-insoluble and highly agglomerated compounds. So that they can diffuse through the membrane barrier of the host cells and through the protein envelope of the viruses or the outer membrane of the trypanosomes and become effective in the cell plasma, or in the virus or parasite interior, they first have to be solubilized in a suitable manner in the aqueous medium
  • thermodynamically stable oil-in-water ultra-microemulstones With the help of specially selected cosurfactants or solubilizers on the one hand and suitable surfactants on the other hand, it is possible to achieve an optimal degree of solubilization of the esters described.
  • All experimental observations on ultramicroemulsions designed in this way can be interpreted uniformly by the assumption that the selected surfactants and cosurfactants, taken as a balanced system, form organized aggregates, so-called micelles, in the aqueous phase. These are more or less spherical in shape, with a hydrodynamic radius of 2.2 to 3.0 nm. See “Mode-selective dynamic light scattering; theory versus expe ⁇ mental reaction", Thomas Gisler, et al., Applied Optics / Vol. 34, No 18/20 June 1995, pp. 3546-3553.
  • the surfactants and hydrotropes create a boundary layer between the outer, aqueous phase and the inner, oily phase of the microemulsion [containing the esters of formulas (I) to (VII), dissolved in the biosurfactant solubilizer], as a result of which the mixture of these two Phases is omitted.
  • the molecules of the selected esters are present in the oily, inner phase in monomeric or in oligomeric agglomerated form.
  • the micelles of the sterol- or vitamin D-ester-containing inner phase of the ultramicroemulsions according to the invention are accordingly on their surface, ie on their boundary layer protected by a surfactant coat, which it repairs, easily diffuse through the cell membrane into the interior of the virus or parasite-infected and thus "defective" or "abnormal” cells. Diffusion through the plasma membrane of infected cells occurs exclusively due to thermal molecular movements The direction that a specific diffusion process takes is determined by the difference in concentration that exists on the fractal plasma membrane between outside and inside the host cell. The diffusion continues along the concentration gradient until it is broken down.
  • the concentration of active substance or the active substance system (“multiple drug system”) is balanced between the extracellular zone and the interior of the individual host cell, the virus or the parasite, and delayed release effects (“slow release effects”) can also occur.
  • Such diffusion processes run independently of any energy supply. They have no relation to cellular metabolic energy. The speed of the diffusion process or the strength of the active substance transport through the membrane of the host cell is determined
  • a globular "micelle" with a hydrodynamic radius of one centimeter has a
  • the "packing density" of a spontaneously dispersible, stable MARIGENOL® concentrate increases in exponential function with the smaller particle size of the micelles.
  • the decisive factors are the correct formation of the inner phase, its balanced relationship to the total concentrate and the selection of the appropriate surfactants.
  • the concentrates which are spontaneously dispersible according to the invention contain: 0.5 to 10% by weight of individual esters of the formulas (I) to (VII), or combinations of such esters, and
  • a pharmaceutically acceptable solvent or solvent mixture serving as hydrotrope or co-emulsifier 0 to 40% by weight of a pharmaceutically acceptable solvent or solvent mixture serving as hydrotrope or co-emulsifier, 5 to 90% by weight of a pharmaceutically acceptable surfactant or surfactant mixture,
  • a stabilizer 0 to 10% by weight of a stabilizer, or Radtkalfangers or a penetration enhancer and carriers and / or diluents
  • pharmaceutical active ingredients are to be understood as all active ingredients that can normally be used in human medicine. Pay for this - e.g. beta blockers
  • Pindolol [1- (4-indolyloxy) -3-isopropylamino-2-propanol] propanolol [1-isopropylamino-3- (1-naphthyloxy) -2-propanol] oxprenolol [1- (o-allyloxyphenoxy) -3-isopropylamino-2 2-propanol] metoprolol [D ⁇ - ⁇ (+ -) - 1- ( ⁇ sopropylam ⁇ no) -3- [p- ⁇ 2-methoxyethyl) - phenoxy-2-propanol] -L (+) tartrate ⁇ ]
  • Acetazolamide [5-Acetam ⁇ do-1, 3,4-th ⁇ ad ⁇ azol-2-sulfonam ⁇ d]
  • Chloroquinaldol [5,7-dichloro-8-hydroxyquininaldine]
  • Crotamiton N-crotonyl-N-ethyl-o-toluidine
  • Diamthazole [6 (-) 2-dimethylamino-ethoxy- (ß-diethylamino -) - benzothiazole dihydrochloride]
  • Pindolol [1- (4-indolyloxy-3-isopropylamino-2-propanol] cytostatics
  • Cyclophosphamide [N, -B ⁇ s- (-Chlore thyl) -am ⁇ no-1-oxa-3-aza-2-phosphocyclohexan-2-ox ⁇ d] anti-inflammatory agents
  • Dexamethasone [9-fluoro-11
  • Nifedipine [1,4-dihydro-2,6-dimethyl-4- (o-nitrophenyl) pyrid-3,5-dicarboxylic acid dimethyl ester]
  • Cinnaza ⁇ n [1-trans-Cnamnyl-4-d ⁇ phenylmethyl-p ⁇ peraz ⁇ n]
  • Pentoxyfyl n [3,7-dimethyl-1 - (5-oxo-hexyl) -xanth ⁇ n] antirythmic
  • Domperidone [5-chloro-1 - ⁇ 1- (3- [2-oxo-1-benz ⁇ m ⁇ dazol ⁇ nyl] -propyl) -4- p ⁇ per ⁇ dyl ⁇ 2-benz ⁇ m ⁇ dazol ⁇ non]
  • Betahistin [2- ⁇ 2-Methylam ⁇ noethyl ⁇ py ⁇ din]
  • Metoclopramide [4- Am ⁇ no-5-chloro-N- (2-d ⁇ ethylam ⁇ noethyl) -2-methoxy-benzamide] antihypertensive agents
  • Taxol (Paclitaxel)
  • the surfactants or surfactant mixtures to be used according to the invention can be anionic, cationic, amphoteric or non-ionic. They are preferably amphoteric or non-ionic and have an HLB ratio (i.e. a "hydrophilic-lipophilic balance") between 2 and 18; for mixtures it is preferably between 2 and 6 on the one hand and 10 and 15 on the other. HLB values provide information about the hydrophilic and lipophilic properties of an emulsifier. See “Hydrophile-Lipophile Balance: History and recent Developments" by Paul Becher in the Journal of Dispersion Science and Technology 5 (1), 81-96 (1984).
  • phosphoric ester surfactants such as: the practically water-free tristyrylphenol polyoxyethylene-18-phosphoric acid ester, TEA salt surfactant:
  • Diphasol® 3873 (CIBA-GEIGY), or the identical Sermul® EA 188 (SERVO), a mixed emulsifier, each consisting of 50% of the two compounds with the formulas: O
  • Diphasol® 3873 (CIBA-GEIGY), an alkylphenol polyglycol ether phosphate surfactant
  • Tinovetin® JU (CIBA-GEIGY), a hydroxybiphenyl-10-ethoxy phosphoric acid ester
  • Butyl mono-4-ethoxy phosphoric acid ester (Zerostat® AT, CIBA-GEIGY), or
  • betaine compounds i.e. amphoteric, salt and water-free imidazole derivatives, such as:
  • Me [ + 1 for hydrogen, alkali and alkaline earth atoms and R x for or C 2 - 32 alkenyl groups are also used, such as, for example, Glucate® SS (methyl glucose sesquistearate, in the CTFA Classification) and Glucamate® SSE-20 (PEG-20 methyl glucose sesquistearate, in the CTFA Classification) AMERCHOL, Edison, NJ, US A.
  • Glucate® SS methyl glucose sesquistearate, in the CTFA Classification
  • Glucamate® SSE-20 PEG-20 methyl glucose sesquistearate, in the CTFA Classification
  • AMERCHOL Edison, NJ, US A.
  • good results can also be achieved by using nonionic compounds from the "TWEEN®” range (Atlas Chem. Ind., Inc .; or ICI Specialty Chemicals), So-called polyoxyethylene sorbitan esters or "polysorbates” 20 to 85 compounds in the CTFA classification [Fluka 93
  • compositions can be used as hydrotropes or as co-emulsifiers, e.g .:
  • an aliphatic carboxylic acid C10 22
  • Hydrocarbons with a straight carbon chain C 12 32 ) which is substituted by 6 to 16 methyl groups and can have 1 to 6 double bonds, of which terpenes such as polymethylbutanes and polymethylbutenes may serve as examples.
  • Mono esters of ethylene glycol or propylene glycol with an aliphatic carboxylic acid (C 6-22) such as propylene lengly kolmonolaurat glykolmonomy ⁇ stat and propylene.
  • Esters of an aliphatic alcohol with lactic acid such as My ⁇ styl- or, preferably, lauryl lactate (C 12. 22); Mono-, di- or T ⁇ ester of Gly ce ⁇ ns with an aliphatic carboxylic acid (C12. 22).
  • lactic acid such as My ⁇ styl- or, preferably, lauryl lactate (C 12. 22); Mono-, di- or T ⁇ ester of Gly ce ⁇ ns with an aliphatic carboxylic acid (C12. 22).
  • C G - 22 aliphatic carboxylic acid
  • Esters with at least one free hydroxyl group from poly (2-10) glycol with an aliphatic carboxylic acid (C 6 22 ).
  • Heterocychic compounds e.g. 1-methyl-2-pyrroleon.
  • Good buffer i.e. zwitterionic, N-substituted aminosulfonic acid compounds such as e.g. "HEPES” - 4- (2-hy-hydroxyethyl) -p ⁇ perazin-1-ethanesulfonic acid or "CHAPS", with the formula: 3 - [(3-Cholam ⁇ do- ⁇ ropyl) -d ⁇ methyl-ammon ⁇ o] -pro-pansulfonate.
  • Suitable additives in the spontaneously dispersible concentrates according to the invention are vitamins and provitamins (such as, for example, vitamin A acid, retinol, tocopherols), and also selected penetration enhancers ("flux enhancers”) and radical scavengers.
  • COMPOSITION EXAMPLES of spontaneously dispersible CONCENTRATES according to the invention which contain active compounds of the formulas (I) to (VI) and which, when diluted with water or 5% glucose solution or physiological saline solution (Ringer's solution) in a ratio of 1: 100 and higher, are thermodynamically stable ULTRAMICROEMULSIONS with a hydrodynamic radius of 2.2 to 3.0 nm result.
  • a phosphoric acid ester surfactant e.g. Diphasol® 3873 (CIBA-GEIGY), tenside 508 (CIBA-GEIGY), Zerostat® AN or AT (CIBA-GEIGY), Tinovetin® JU (CIBA-GEIGY), Soprophor® FL (RH ⁇ NE-POULENC), 5 to 903 weight % Invadin JFC 800% (CIBA-GEIGY), 0 to 10% by weight of a vitamin or provitamin.
  • a phosphoric acid ester surfactant e.g. Diphasol® 3873 (CIBA-GEIGY), tenside 508 (CIBA-GEIGY), Zerostat® AN or AT (CIBA-GEIGY), Tinovetin® JU (CIBA-GEIGY), Soprophor® FL (RH ⁇ NE-POULENC), 5 to 903 weight % Invadin JFC 800% (CIBA-GEIGY), 0 to 10% by weight of a vitamin or provitamin.
  • ⁇ ) wherein R 5 is a C2-31 alkyl and a C3_3i alkenyl or alkapolyen group and R 6 is citronellyl, farnesyl, geranyl, isophytyl or phytyl, 30 to 45% by weight Invadin® JFC 800%,
  • Soprophor® FL or Diphasol® 3873 30 to 45% by weight of Soprophor® FL or Diphasol® 3873.
  • TWEEN® 20 and / or TWEEN® 65 or TWEEN® 85 50 to 70% by weight of TWEEN® 20 and / or TWEEN® 65 or TWEEN® 85
  • Citronellyl-1 O-undecenoate (Cn i-Citronellylester), 34 to 40% by weight Invadin® JFC 800%, 34 to 40% by weight Soprophor® FL.
  • citronellyl laurate C 12 o -tronellylester
  • Invadin® JFC 800% 34 to 40% by weight Soprophor® FL.
  • INVADIN® JFC 800% (CIBA-GEIGY) is an anhydrous tert. Octyl phenyl polyoxyethylene ether surfactant with 9 to 10 oxyethylene groups. SOPROPHOR®-FL (RH ⁇ NE-POULENC) is a practically anhydrous tristyrylphenol polyoxyethylene-18-phosphoric acid ester TEA salt surfactant.
  • TWEEN® 20 is a polyoxyethylene (20) sorbitan monolaurate surfactant (CAS No. 9005-64-5, "Polysorbate 20" in the CTFA classification). TWEEN® 65 is the tristearate and TWEEN® 85 is the trioleate of this connection box.
  • Metolose® 90 SH-4000 (Shin-Etsu Chemical) 90.0 g
  • MSR gastric juice resistance.
  • the pellets / granules according to a) can also be filled directly into capsules, which are made from AQOAT® (HPMC-AS-M or HPMC-AS-N), are sealed with acetone / ethanol 1 1 and thus the functions of the Control MSR and the delayed release (retard) appropriately
  • Tumor cells transformed with 10 ⁇ / ml Py6 virus are inactivated in culture medium RPMI 1640 with 10% fetal calf serum (GIBCO); they are sown so leaky that they can grow during the assay in so-called non-confluent monolayers.
  • the sample is added after 6 to 24 hours, with 100 ⁇ l per row, which is mixed with 100 ⁇ l medium in 1 hole. Half of it is removed and placed in the following hole, again mixed with 100 ⁇ l medium, etc.
  • a geometric thinning row n' ⁇ is created.
  • Immuno-Deficiency Syndrome AIDS ", or against pathologically effective
  • CCID50 cell c_ulture mfective dose 50%. Twice serial dilutions of each of the 6 virus suspensions were made, of which 200 ⁇ l each were incubated with MT4 cell pellets for 90 minutes, as indicated above (see 3.1). At the end of the incubation, the pellets are brought to the original cell concentration by adding the required amount of medium to each sample and then introducing them into 8 holes of a microtiter plate with 200 ⁇ l each. After 5 days of incubation, the vitality of the cells is measured using the MTT test, as shown above.
  • the HIV titer is given as the reciprocal of the dilution which infects 4 out of 8 samples in a row (50%). The content of a hole is considered infected if the reading of the O.D. at 550 nm is lower than the mean of the 8 control holes minus 2.8 times the standard deviation (lower 95% confidence limit).
  • Host cells embryonic cat cells
  • Virus non-human feline leukemia virus
  • Viabihty quantified using the MTT assay from Boehngner (MST-1) and succinate tetrazolium reductase (EC 1.3.99.1) Detection: Enzyme Immuno Assay (EIA) for the p27 virus protein
  • CMV Human cytomegalovirus
  • the test was carried out with human, embryonic lung fibroblasts as host cells, which were then infected with the CMV strain AD 169.
  • the strain "CVM umano AD169" was for 4 hours at + 4 ° C with different concentrations of the test substance C 16: 0- (1-sitosteryl ester, formulated as a 1% concentrate and then diluted to an aqueous microemulsion 10-3, 10- 4 and 10 " 5 , incubated and then inoculated as pretreated virus suspensions on cultures of human, embryonic lung fibroblasts. Approach as confluent culture with 120,000 cells per shell vial.
  • the infection was centrifuged for 45 minutes at 1500 rpm and at RT was completed, the suspension for injection was removed and 1 ml of MEM culture medium with 2% fetal calf serum (as in the cultivation) was added; the infected cells were then kept at 37 ° C. and under a 5% CO 2 atmosphere for 20 h.
  • the medium was removed, the cells were collected, fixed with 2% acetone-methanol (2: 1) and washed 3 times with PBS.
  • the quantification was carried out by means of immunofluorescence measurement.
  • the vials were filled with the monoctonal antibody "Anti-P-72 CMV" (an immediate precursor protein of the CMV that was already in the infected cells after 6 hours can be detected) and incubated for 30 minutes at 37 ° C in a humid atmosphere
  • controls were prepared with infected cells, which were prepared under the same conditions but without pretreatment with the test substance.
  • the nuclei positive for the CMV-specific antigen are paid for using a fluorescence microscope at 25x magnification in the aqueous phase.
  • a dose-dependent, direct virucidal effect can be clearly determined.
  • the virus is no longer virulent enough to infect the sensitive host cells
  • Herpes virus (herpes simplex, HSV)
  • the antiviral / virucidal effect of a watery microemulsion of suitable MARIGENOL® concentrates is determined using a confluent monolayer culture of VERO cells (ie "Af ⁇ can green monkey kidney cells”).
  • results show a clear direct effect on the VERO host cells infected with HS virus.
  • concentration of 10-4 ß-sitosteryl arachidate the number of PIaques appears to be reduced by 76% compared to the controls.
  • the HSV titer is significantly reduced.
  • HBV hepatitis B virus
  • the tests were carried out with immortalized hepatic hematoma cells which, after infection with the hepatitis B virus, the two antigens Hbs Ag (a "surface antigen” from the outer shell of the virus) and Hbe Ag (a "core antigen” from the core of the DNA) Virus) secrete.
  • Hbs Ag a "surface antigen” from the outer shell of the virus
  • Hbe Ag a "core antigen” from the core of the DNA) Virus
  • Orientative experiments in vitro were carried out with a 1% concentrate of the three test substances ß-sitosteryl palmitate, ß-sitosteryl arachidate and ergosteryl isovalerate from Prof. Dott. Antonio Ponzetto and by Dotta Rossana Cavallo, Universita di To ⁇ no.
  • MIC minimum inhibitory concentration
  • IC50 50% killing rate concentration
  • N.B. are the measured values of the concentrates on W.S. - In terms of content, they are 100 times smaller. To be considered when interpreting the MIC values.
  • the characteristic peak appears after about 5 minutes. 6.3 Detection of membrane penetration on the tumor cell or the infected host cell.
  • micellar capillary zone electrophoresis (Beckman Instruments, P / ACE System 2100 or the BioFocus integrator from Bio-Rad).
  • M monocytes (macrophages)
  • N neutrophil granulocytes
  • E eosinophthal granulocytes
  • Test 1 2% concentrate containing C 12: 0-cholesteryl ester
  • Test 2 2% concentrates containing C 16: 0 ergosteryl ester
  • Test 3 2% concentrates containing C 5: 0-cholecalciferyl ester

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Medicinal Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Dispersion Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Medicinal Preparation (AREA)

Abstract

L'invention concerne l'utilisation d'esters de stérol et d'esters sélectionnés avec des composés de vitamine D afin de préparer des médicaments à effet antiviral, virucide et/ou parasiticide et d'améliorer l'absorption d'activateurs externes, ainsi que leur présentation pharmaceutique sous forme de concentrés spontanément dispersibles et leur transformation en systèmes thérapeutiques de médicaments multiples.
EP96925634A 1996-08-13 1996-08-13 Concentres spontanement dispersibles d'esters de sterols et de derives de vitamine d a effet antiviral, virucide et/ou parasiticide Withdrawn EP0858331A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH1996/000280 WO1998006390A1 (fr) 1996-08-13 1996-08-13 Concentres spontanement dispersibles d'esters de sterols et de derives de vitamine d a effet antiviral, virucide et/ou parasiticide

Publications (1)

Publication Number Publication Date
EP0858331A1 true EP0858331A1 (fr) 1998-08-19

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EP96925634A Withdrawn EP0858331A1 (fr) 1996-08-13 1996-08-13 Concentres spontanement dispersibles d'esters de sterols et de derives de vitamine d a effet antiviral, virucide et/ou parasiticide

Country Status (2)

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EP (1) EP0858331A1 (fr)
WO (1) WO1998006390A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6180661B1 (en) 1997-04-28 2001-01-30 Marigen, S.A. Bioflavonol-glycoside peresters and their incorporation into pharmacologically active concentrates and ultramicroemulsions
DE10101319A1 (de) * 2001-01-09 2002-07-18 Schering Ag Morphometrisches Gewebe- oder Zellpräparat
US7126017B2 (en) * 2003-01-17 2006-10-24 Wisconsin Alumni Research Foundation Method of reducing toxicity of retinoids
AU2004206900B2 (en) * 2003-01-17 2011-03-10 Wisconsin Alumni Research Foundation Modified retinoid compounds and their uses

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59004337D1 (de) * 1989-07-21 1994-03-03 Marigen Sa Sterole, deren fettsäureester und glucoside; verfahren zu ihrer herstellung; spontan dispergierbare mittel mit diesen verbindungen, sowie ihre verwendung zur behandlung von tumoren.
CH681153A5 (de) * 1991-01-28 1993-01-29 Marigen S.A. Neue sterolester- und sterolphosphorverbindungen.
CH681152A5 (de) * 1991-06-04 1993-01-29 Marigen S.A. Neue biotenside und antitumorale ester und phosphatide mit vitamin-d- und vitamin-e-verbindungen, ihre herstellung und aufarbeitung zu spontan dispergierbaren konzentraten.

Non-Patent Citations (1)

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Title
See references of WO9806390A1 *

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