HK26197A - Loading and controlled release of amphiphatic molecules to and from liposomes - Google Patents

Loading and controlled release of amphiphatic molecules to and from liposomes Download PDF

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Publication number
HK26197A
HK26197A HK26197A HK26197A HK26197A HK 26197 A HK26197 A HK 26197A HK 26197 A HK26197 A HK 26197A HK 26197 A HK26197 A HK 26197A HK 26197 A HK26197 A HK 26197A
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HK
Hong Kong
Prior art keywords
liposomes
ammonium
drug
gradient
loading
Prior art date
Application number
HK26197A
Other languages
German (de)
English (en)
Inventor
Barenholz Yechezkel
Haran Gilad
Original Assignee
Yissum Research Development Company Of The Hebrew University Of Jerusalem
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yissum Research Development Company Of The Hebrew University Of Jerusalem filed Critical Yissum Research Development Company Of The Hebrew University Of Jerusalem
Publication of HK26197A publication Critical patent/HK26197A/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K49/00Preparations for testing in vivo
    • A61K49/22Echographic preparations; Ultrasonic imaging preparations
    • A61K49/222Echographic preparations; Ultrasonic imaging preparations characterised by a special physical form, e.g. emulsions, liposomes
    • A61K49/227Liposomes, lipoprotein vesicles, e.g. LDL or HDL lipoproteins, micelles, e.g. phospholipidic or polymeric
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K9/00Medicinal preparations characterised by special physical form
    • A61K9/10Dispersions; Emulsions
    • A61K9/127Synthetic bilayered vehicles, e.g. liposomes or liposomes with cholesterol as the only non-phosphatidyl surfactant
    • A61K9/1277Preparation processes; Proliposomes
    • A61K9/1278Post-loading, e.g. by ion or pH gradient
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S436/00Chemistry: analytical and immunological testing
    • Y10S436/829Liposomes, e.g. encapsulation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2984Microcapsule with fluid core [includes liposome]

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Radiology & Medical Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Acoustics & Sound (AREA)
  • Dispersion Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Medicinal Preparation (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Claims (10)

  1. Système pour introduire une molécule amphiphatique dans des liposomes, comprenant la formation d'une suspension de liposomes en présence d'un composé d'ammonium ou d'un sel d'ammonium où ladite suspension est diluée avec un tampon ou sel pour produire un gradient d'ammonium, de l'intérieur à l'extérieur, entre les phases interne aqueuse et externe aqueuse et un gradient de pH où le pH à l'intérieur des liposomes est plus acide que le pH à l'extérieur.
  2. Système de la revendication 1, où le composé d'ammonium est le sulfate d'ammonium, l'hydrate d'ammonium, le bicarbonate d'ammonium ou le carbonate d'ammonium.
  3. Système de la revendication 2, où la molécule amphiphatique est choisie dans le groupe consistant en doxorubicine, daunorubicine, chloroquinone, propranolol, pentamidine, épirubicine, carcinomycine, N-acétyladriamycine, rubidazone, 5-imidodaunomycine, N-acétyldaunomycine, tous les médicaments d'anthracycline, daunoryline, dibucaïne, tétracaïne, procaïne, chlorpromazine, vinblastine, vincristine, mitomycine C, pilocarpine, physostigmine, néostigime, chloroquinine, amodiaquine, chloroguanide, primaquine, méfloquine, quinine, piridinol, prodipine, mésylate de benzotropine, chlorydrate de trihexyphénidyle, timolol, pindolol, quinacrine, bénadryle, prométhazine, dopamine, sérotonine, épinéphrine, codéine, mépéridine, méthadone, morphine, atropine, décyclomine, méthixène, propanthéline, imipramine, amitriptyline, doxépine, désipramine, quinidine, lidocaïne, chlorpromazine, prométhazine, perphénazine, orange d'acridine, prostaglandine, fluorescéine et carboxyfluorescéine.
  4. Système de la revendication 3, où la molécule amphiphatique est introduite dans les liposomes en échange de l'ammonium à l'efflux des liposomes du fait de sa concentration et l'étendue de l'introduction du médicament dépend du rapport du sulfate d'ammonium intérieur à extérieur et du pH de la phase aqueuse interne.
  5. Méthode pour l'introduction efficace de molécules amphiphatiques dans des liposomes comprenant :
    (a) la formation d'une suspension des liposomes en présence de sulfate d'ammonium;
    (b) la création d'un gradient d'ammonium de l'intérieur à l'extérieur et d'un gradient de pH de l'extérieur vers l'intérieur par dilution de la phase aqueuse externe de la suspension de l'étape (a) avec un sel ou tampon approprié ou par élimination d'ammoniac; et
    (c) l'introduction du médicament amphiphatique déprotoné, de l'extérieur à l'intérieur des liposomes.
  6. Méthode de la revendication 5, où le médicament amphiphatique est introduit dans les liposomes par influx en échange de l'efflux d'ammonium, selon le gradient d'ammonium.
  7. Suspension de liposomes et de sel d'ammonium appropriée à l'introduction d'un médicament amphiphatique dans des liposomes en formant un gradient d'ammonium d'une phase aqueuse interne à une phase aqueuse externe des liposomes par dilution ou élimination d'ammonium de la phase aqueuse externe, où ledit gradient d'ammonium de l'intérieur vers l'extérieur crée un gradient de pH, de l'extérieur vers l'intérieur, permettant l'introduction d'un médicament amphiphatique dans les liposomes.
  8. Liposomes d'ammonium pour l'introduction d'un médicament amphiphatique ayant un gradient d'ammonium de l'intérieur vers l'extérieur, créé par dilution ou élimination de l'ammonium dans la suspension des liposomes par un sel ou un tampon.
  9. Suspension de liposomes et d'un sel d'ammonium permettant la libération d'un médicament amphiphatique des liposomes par création d'un pH inverse d'une phase aqueuse interne à une phase aqueuse externe des liposomes.
  10. Liposomes d'ammonium, appropriés à la production de gaz carbonique et à la libération dudit gaz carbonique vers le tissu pour améliorer l'hyperéchogénicité de l'imagerie aux ultrasons.
HK26197A 1988-09-28 1997-03-06 Loading and controlled release of amphiphatic molecules to and from liposomes HK26197A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25068788A 1988-09-28 1988-09-28

Publications (1)

Publication Number Publication Date
HK26197A true HK26197A (en) 1997-03-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
HK26197A HK26197A (en) 1988-09-28 1997-03-06 Loading and controlled release of amphiphatic molecules to and from liposomes

Country Status (11)

Country Link
US (2) US5192549A (fr)
EP (1) EP0361894B1 (fr)
JP (1) JP2659136B2 (fr)
AT (1) ATE113830T1 (fr)
CA (1) CA1335565C (fr)
DE (2) DE19675049I2 (fr)
ES (1) ES2067551T3 (fr)
HK (1) HK26197A (fr)
IL (1) IL91664A (fr)
LU (1) LU88856I2 (fr)
NL (1) NL960033I2 (fr)

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ES2067551T3 (es) 1995-04-01
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CA1335565C (fr) 1995-05-16
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JP2659136B2 (ja) 1997-09-30
LU88856I2 (fr) 1997-01-31
JPH02196713A (ja) 1990-08-03
DE68919321T2 (de) 1995-05-24
NL960033I1 (nl) 1997-03-03
DE19675049I2 (de) 2009-05-28
US5192549A (en) 1993-03-09
NL960033I2 (nl) 2005-04-01
US5316771A (en) 1994-05-31
IL91664A (en) 1993-05-13
ATE113830T1 (de) 1994-11-15
IL91664A0 (en) 1990-04-29

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