EP4547288A1 - Monomère radio-opaque et microsphères d'embolisation le comprenant - Google Patents
Monomère radio-opaque et microsphères d'embolisation le comprenantInfo
- Publication number
- EP4547288A1 EP4547288A1 EP23733790.2A EP23733790A EP4547288A1 EP 4547288 A1 EP4547288 A1 EP 4547288A1 EP 23733790 A EP23733790 A EP 23733790A EP 4547288 A1 EP4547288 A1 EP 4547288A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- advantageously
- monomer
- acrylate
- alkyl
- microspheres
- 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.)
- Pending
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/001—Use of materials characterised by their function or physical properties
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- A—HUMAN NECESSITIES
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
- A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
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- A61K49/00—Preparations for testing in vivo
- A61K49/0002—General or multifunctional contrast agents, e.g. chelated agents
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K49/00—Preparations for testing in vivo
- A61K49/04—X-ray contrast preparations
- A61K49/0433—X-ray contrast preparations containing an organic halogenated X-ray contrast-enhancing agent
- A61K49/0438—Organic X-ray contrast-enhancing agent comprising an iodinated group or an iodine atom, e.g. iopamidol
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- A—HUMAN NECESSITIES
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- A61K49/0433—X-ray contrast preparations containing an organic halogenated X-ray contrast-enhancing agent
- A61K49/0442—Polymeric X-ray contrast-enhancing agent comprising a halogenated group
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- A61K49/0433—X-ray contrast preparations containing an organic halogenated X-ray contrast-enhancing agent
- A61K49/0447—Physical forms of mixtures of two different X-ray contrast-enhancing agents, containing at least one X-ray contrast-enhancing agent which is a halogenated organic compound
- A61K49/0476—Particles, beads, capsules, spheres
- A61K49/048—Microparticles, microbeads, microcapsules, microspheres, i.e. having a size or diameter higher or equal to 1 micrometer
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- A—HUMAN NECESSITIES
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- A61K49/00—Preparations for testing in vivo
- A61K49/06—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations
- A61K49/18—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations characterised by a special physical form, e.g. emulsions, microcapsules, liposomes
- A61K49/1818—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations characterised by a special physical form, e.g. emulsions, microcapsules, liposomes particles, e.g. uncoated or non-functionalised microparticles or nanoparticles
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- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/0012—Galenical forms characterised by the site of application
- A61K9/0019—Injectable compositions; Intramuscular, intravenous, arterial, subcutaneous administration; Compositions to be administered through the skin in an invasive manner
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- A—HUMAN NECESSITIES
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- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5005—Wall or coating material
- A61K9/5021—Organic macromolecular compounds
- A61K9/5026—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
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- A61K9/5094—Microcapsules containing magnetic carrier material, e.g. ferrite for drug targeting
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- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/001—Use of materials characterised by their function or physical properties
- A61L24/0015—Medicaments; Biocides
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/0047—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L24/0052—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material with an inorganic matrix
- A61L24/0068—Inorganic materials not covered by groups A61L24/0057 or A61L24/0063
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- A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
- A61L24/04—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials
- A61L24/06—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/533—Monocarboxylic acid esters having only one carbon-to-carbon double bond
- C07C69/54—Acrylic acid esters; Methacrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
- C08F220/285—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety
- C08F220/286—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety and containing polyethylene oxide in the alcohol moiety, e.g. methoxy polyethylene glycol (meth)acrylate
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/36—Materials or treatment for tissue regeneration for embolization or occlusion, e.g. vaso-occlusive compositions or devices
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/22—Esters containing halogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/30—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety
- C08F220/305—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety
- C08F220/308—Esters containing oxygen in addition to the carboxy oxygen containing aromatic rings in the alcohol moiety and containing a polyether chain in the alcohol moiety and polyethylene-co-propylene oxide chain in the alcohol moiety
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/102—Esters of polyhydric alcohols or polyhydric phenols of dialcohols, e.g. ethylene glycol di(meth)acrylate or 1,4-butanediol dimethacrylate
Definitions
- New radiopaque monomer and embolization microspheres comprising it FIELD OF THE INVENTION
- the present invention relates to a new halogenated radiopaque monomer, in particular intended to be used within a reticulated matrix entering into the composition of embolization microspheres .
- Therapeutic vascular occlusion i.e. embolization
- embolization is used to prevent or treat certain pathological conditions in situ. It can be carried out using catheters allowing, under imaging control, to position particulate occlusion agents (that is to say emboli or embolic agents) in the circulatory system.
- vascular malformations can cause tumor necrosis and avoid a more invasive operation.
- This occlusion technique can also be coupled with the provision of an anticancer agent in the context of chemoembolization. This makes it possible to increase the local concentration while limiting the systemic exposure of the drug through targeted injection, as well as its residence time in the tumor.
- vascular occlusion normalizes blood flow to normal tissues and helps with surgery by limiting the risk of hemorrhage.
- Embolization agents are conventionally introduced into a blood vessel via a catheter, in particular a microcatheter, whose diameter is less than that of the vessel to be treated.
- Embolization agents for vascular occlusion include, for example, embolization fluids (acrylic glues, gels), mechanical devices, particles and polymeric embolization microspheres. The choice of a specific material depends on many factors, such as the type of lesion to be treated, the type of catheter to be used, and the need for temporary or permanent embolization.
- Polymer-based embolization microspheres are particularly useful for the aforementioned therapeutic purposes. They can be biodegradable for temporary embolization, as described in applications WO 2012/120139 and WO 2012/120138, or non-biodegradable for permanent embolization.
- the product Embosphere® (Biosphere Medical) corresponds to non-biodegradable microspheres based on trisacryl (N-acryloyl-2-amino-2-hydroxymethylpropane-1,3 diol) and gelatin.
- Non-biodegradable microspheres based on acrylic copolymers and polyvinyl alcohol (PVA) have also been proposed for permanent embolization (Osuga et al. (2002) J. Vasc Interv Radiol.
- the embolization microspheres can be made radiopaque by adding a radiopaque entity or monomer to their composition.
- a radiopaque entity or monomer such radiopaque embolization microspheres are described in applications WO 2021/069527 and WO 2021/069528.
- the microspheres of these applications integrate a radiopaque monomer called MAOETIB, of the following formula:
- Radiopacity refers to the relative inability of electromagnetism, particularly x-rays, to pass through dense materials, which are described as "radiopaque" appearing opaque/white in an x-ray image.
- Radiopacity Given the complexity of the content in a radiographic or fluoroscopic image, clinicians are sensitive to image quality as it relates to the brightness or signal strength of the material in the image.
- the two main factors that contribute to the importance of radiopacity are density and atomic number.
- Polymer-based medical devices requiring radiopacity typically use a polymer blend that incorporates a small amount, in weight percentage, of a radiopaque element such as a heavy atom such as halogen, particularly iodine.
- a radiopaque element such as a heavy atom such as halogen, particularly iodine.
- the ability of a device to be visualized by fluoroscopy depends on the amount or density of the radiopaque element mixed into the material.
- the addition of a radiopaque entity or monomer possessing halogenated groups appears to considerably reduce the hydrophilic nature of the material.
- microspheres integrating this type of entity or radiopaque monomer have their density increased, which impacts their suspendability properties in the injection medium.
- the microspheres loaded with iodine to be visible in X-ray of the prior art are typically more hydrophobic, dense and rigid than the microspheres not visible in X-ray and tend to form aggregates of microspheres.
- they are difficult to maintain in suspension for the duration of the injection in the catheter, and (2) they often block the catheter, even when their diameter is smaller than the internal diameter of the catheter (Duran 2016), for example, because they clump together more easily (3), they tend to stick to the walls of the catheter.
- radiopaque entities or monomers included in the composition of the embolization microspheres which allow the latter to remain hydrophilic and flexible when they are swollen with water. It is also desired that these microspheres have mechanical properties, in particular a swelling rate, elasticity and compressibility, adequate for injection via a catheter or microcatheter. It is also desired that these microspheres can be kept in suspension in the injection mixture (mixture composed of contrast product and aqueous phase) for the duration of the injection into the catheter. Indeed, to be injectable and so that the practitioner can follow the injection under X-ray control, the microspheres are generally suspended in a mixture of non-ionic iodinated contrast product and aqueous phase.
- radiologists generally use a solution of contrast product and possibly physiological saline, bicarbonate buffer or phosphate buffer, advantageously a 100% solution of contrast product.
- the microspheres must be kept homogeneously suspended in this solution. If the microspheres sediment or, on the contrary, float on the surface of the solution, the resulting suspension is non-homogeneous, unstable and therefore cannot be injected into the patient.
- Applications WO 2021/069527 and WO 2021/069528 describe halogenated radiopaque monomers which make it possible to meet these requirements satisfactorily.
- this new halogenated radiopaque monomer of formula (A) in the embolization microspheres also prevents the latter from sticking to the walls of the catheter or microcatheter before injection.
- the suspendability and injectability properties of these microspheres are improved thanks to this new radiopaque monomer.
- improved suspendability is meant, within the meaning of the present invention, the capacity of the microspheres to form a stable suspension over a time compatible with their use, and homogeneous, that is to say with a distribution of microspheres identical at every point of the volume of the suspension.
- the present invention therefore relates to a compound of formula (A) below: This compound is also designated by the term MAETIP in the present description.
- Another object of the present invention relates to the use of the compound of formula (A) as defined above as a radiopaque halogenated monomer.
- Another object of the invention relates to embolization microspheres comprising said halogenated radiopaque monomer of formula (A).
- the present invention therefore also relates to the use of this compound of formula (I) in embolization microspheres.
- the present invention further relates to a pharmaceutical composition comprising embolization microspheres as defined above, in association with a pharmaceutically acceptable vehicle, advantageously for administration by injection.
- the present invention also relates to a kit comprising a pharmaceutical composition as defined above and at least one means of injecting said composition, for administration of said composition parenterally.
- the present invention also relates to a kit comprising on the one hand a pharmaceutical composition as defined above and on the other hand a contrast agent for X-ray, magnetic resonance or ultrasound imaging, and possibly at least one injection means for parenteral administration, advantageously said injection means is the Vectorio® device as described in applications WO2016/166346, WO2016/166339, WO2017/005914 and WO2017/081178.
- DETAILED DESCRIPTION The main object of the present invention is therefore the compound of formula (A): In the compound of formula (A), the iodine atoms are placed in positions 2, 4 and 6 of the phenyl ring.
- this compound Due to the size of the iodine atoms and their homogeneous distribution on the phenyl ring, this compound has reduced spatial accessibility to aromatic carbons (in positions 3 and 5 of the phenyl ring), compared to MAOETIB or the compound (Vb ) of application WO 2021/069528 (where the iodine atoms are in position 2, 3 and 5 and the aromatic carbons in position 4 and 6 of the phenyl ring).
- the restricted accessibility to aromatic carbons in the compound of formula (A) seems to have the effect of reducing the lipophilic character of the molecule. Indeed, the inter-or intramolecular interactions of these carbons are reduced, or even zero, so as to limit the stickiness of the molecule.
- the spatial configuration of the compound of formula (A) makes it possible to limit the aggregation between them of the embolization microspheres integrating said compound.
- this compound of formula (A) is advantageously used as a radiopaque halogenated monomer.
- the present invention also relates to the use of the compound of formula (A) as defined above as a radiopaque halogenated monomer.
- the present invention relates to embolization microspheres comprising said halogenated radiopaque monomer of formula (A).
- said embolization microspheres comprise a crosslinked polymer matrix comprising the halogenated radiopaque monomer of formula (A).
- said crosslinked polymer matrix is as defined in application WO2021/069528 with the exception of the halogenated radio-opaque monomer of general formula (II) replaced by the compound of formula (A) according to the invention .
- hydrophilic monomer of formula (I), the crosslinking monomer c) and the transfer agent d) are advantageously as defined in application WO2021/069528, in particular on pages 13 and 19-22.
- hydrophilic monomer is meant, within the meaning of the present invention, a monomer having a strong affinity for water, that is to say tending to dissolve in water, to mix with water. , to be wetted by water, or capable of swelling in water after polymerization.
- crosslinking monomer is meant, within the meaning of the present invention, a monomer that is at least bifunctional but also multifunctional having a double bond at each polymerizable end.
- the crosslinking monomer in combination with the other monomers in the mixture, allows the formation of a crosslinked network.
- the structure and quantity of crosslinking monomer(s) in the monomer mixture can be easily chosen by those skilled in the art to provide the desired crosslinking density.
- the crosslinker is also advantageous for the stability of the microspheres.
- the crosslinker prevents the microspheres from dissolving in any solvent.
- the crosslinker also makes it possible to improve the compressibility of the microspheres, which is favorable for embolization.
- non-biodegradable hydrophilic crosslinker is meant, within the meaning of the present invention, a crosslinker as defined above, having a strong affinity for water and not being able to be degraded in the physiological conditions of the body of a mammal, in particular of the human body. Indeed, the biodegradation of a molecule is permitted when it contains sufficient functional sites that can be cleaved under physiological conditions, in particular by endogenous enzymes of the body of a mammal, in particular of the human body, and/or Physiological pH (generally around 7.4).
- the functional sites cleavable under physiological conditions include amide bonds, ester bonds and acetals.
- the crosslinking monomer contains less than 20 functional sites cleavable under physiological conditions, preferably less than 15 sites, more preferably less than 10 sites, even more preferably less than 5 sites.
- the term “transfer agent” means a chemical compound having at least one weak chemical bond. This agent reacts with the radical site of a growing polymer chain and interrupts the growth of the chain. In the chain transfer process, the radical is temporarily transferred to the transfer agent which restarts growth by transferring the radical to another polymer or monomer.
- matrix based on it is of course necessary to understand a matrix comprising the mixture and/or the product of the reaction between the base constituents used for the polymerization in a heterogeneous medium of this matrix, preferably only the product of the reaction between the different basic constituents used for this matrix, some of them being intended to react or capable of reacting with each other or with their close chemical environment, at least in part, during the different phases of the manufacturing process of the matrix, in particular during a polymerization step.
- the basic constituents are the reagents intended to react together during the polymerization of the matrix.
- the base constituents are therefore introduced into a reaction mixture optionally further comprising a solvent or a mixture of solvents and/or other additives such as at least one salt and/or at least one polymerization initiator and/or at least one stabilizer such as PVA.
- the reaction mixture comprises at least the monomers a), b), c) and the transfer agent d) cited in the present description as basic constituents, optionally a polymerization initiator as for example t-butyl peroxide, benzoyl peroxide, azobiscyanovaleric acid (also called 4,4'-Azobis(4-cyanopentanoic) acid), AIBN (azobisisobutyronitrile), or 1,1'-Azobis(cyclohexane carbonitrile) or one or more thermal initiators such as 2-Hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone (106797-53-9); 2-Hydroxy-2-methylpropiophenone
- the matrix is based at least on the monomers a), b), c) and the transfer agent d) cited in the present description, these compounds therefore being basic constituents.
- expressions similar to “the [basic constituent basic constituent X] in an amount from YY% to YYY%” are interpreted similarly.
- expressions similar to “the reaction mixture comprises at least [the basic constituent X]” and “the crosslinked matrix is based on at least [the basic constituent X]” are interpreted similarly.
- organic phase of the reaction mixture is meant, within the meaning of the present invention, the phase comprising the organic solvent and the compounds soluble in said organic solvent, including monomers, transfer agent and polymerization initiator.
- (CX-CY)alkyl group is meant, within the meaning of the present invention, a saturated monovalent hydrocarbon chain, linear or branched, comprising X to Y carbon atoms, X and Y being integers between 1 and 36, preferably 1 and 18, in particular 1 and 6.
- X and Y being integers between 1 and 36, preferably 1 and 18, in particular 1 and 6.
- the compound of formula (A) is in particular added to the reaction mixture in an amount of 5% to 50%, in particular in an amount greater than 7% and less than or equal to 50%, in particular in an amount greater than 10% and less than or equal to 50%, more particularly in an amount greater than 15% and less than or equal to 50%, preferably in an amount greater than 15% and less than or equal to 35% , and in particular from 20% to 30% per Mole, relative to the total number of moles of monomers.
- the embolization microspheres comprising the crosslinked polymer matrix as defined above advantageously correspond to spherical particles having a diameter after swelling ranging from 20 to 1200 ⁇ m, for example from 20 to 100 ⁇ m, from 40 to 150 ⁇ m, from 100 at 300 ⁇ m, 300 to 500 ⁇ m, 500 to 700 ⁇ m, 700 to 900 ⁇ m or 900 to 1200 ⁇ m, as determined by optical microscopy.
- the microspheres advantageously have a diameter small enough to be injected by needles, a catheter or a microcatheter with an internal diameter varying from a few hundred micrometers to more than a millimeter.
- the expression “after swelling” means that the size of the microspheres is considered after the polymerization and sterilization steps which occur during their preparation.
- the sterilization step involves for example passing the microspheres after the polymerization step in a high temperature autoclave, typically at a temperature above 100°C, preferably at a temperature between 110°C and 150°C, preferably 121°C. During this sterilization step, the microspheres continue to swell in a controlled manner, that is to say with a controlled swelling rate.
- the swelling rate is defined as: where mw is the weight in grams of 1 mL of sedimented microspheres and md is the weight in grams of 1ml of sedimented microspheres which were then lyophilized.
- the crosslinked polymer matrix of the microspheres is based solely on the basic constituents a), b), c) and d) as defined above, in the aforementioned proportions of monomers and transfer agent, no other basic constituent being added to the reaction medium. It is thus clear that the sum of the above-mentioned proportions of monomers a), b) and c) must be equal to 100%.
- the hydrophilic monomer of formula (I) is chosen from the group consisting of N-vinylpyrrolidone, vinyl alcohol, 2-hydroxyethylmethacrylate, sec-butyl acrylate, n-butyl acrylate, t-butyl acrylate, t-butyl methacrylate, t-butyl, methylmethacrylate, N-dimethylaminoethyl(methyl)acrylate, N,N-dimethylaminopropyl-(meth)acrylate, t-butylaminoethyl(methyl)acrylate, ⁇ , ⁇ -diethylaminoacrylate, poly(ethylene oxide) (meth)acrylate, methoxy poly(ethylene oxide) (meth)acrylate, butoxy poly(ethylene oxide) (meth)acrylate, poly(ethylene glycol) (meth)acrylate, (meth)acrylate methoxy poly(ethylene glycol), butoxy poly(ethylene glycol) (meth)acrylate (me
- the hydrophilic monomer a) is poly(ethylene glycol) methyl ether methacrylate (m-PEGMA).
- the hydrophilic monomer a) is in particular added to the reaction mixture in an amount of 20% to 90%, preferably 30% to 80%, preferably 40% to 70%, in particularly from 45% to 65% per Mole, relative to the total number of moles of monomers.
- the crosslinked matrix in particular based on the hydrophilic monomer a) in an amount of 20% to 90%, preferably 30% to 80%, preferably 40% to 70% , in particular from 45% to 65% per Mole, relative to the total number of moles of monomers.
- PEG polyethylene glycol
- PDMS poly(dimethylsiloxane)
- PGE poly-glycerol ester
- PEG polyethylene glycol
- the polyethylene glycol has a length varying from 200 to 10000 g/mol, preferably from 200 to 2000 g/mol, more preferably from 500 to 1000 g/mol.
- a crosslinking monomer which can be used in the context of the present invention, mention may be made (without being limiting): 1,4-butanediol diacrylate, pentaerythritol tetraacrylate, methylenebisacrylamide, glycerol 1,3-diglycerolate diacrylate and poly(ethylene glycol)dimethacrylate (PEGDMA).
- the crosslinking monomer is poly(ethylene glycol) dimethacrylate (PEGDMA), the polyethylene glycol unit having a length varying from 200 to 10000 g/mol, preferably from 200 to 2000 g/mol, more preferably from 500 to 1000 g /mol.
- the crosslinking monomer is in particular added to the reaction mixture in an amount of 1% to 15%, preferably 2% to 10%, in particular 2% to 7%, more particularly 2%. at 5% per mole, relative to the total number of moles of monomers.
- said chain transfer agent is chosen from the group consisting of monofunctional or polyfunctional thiols, and alkyl halides.
- said chain transfer agent is a cycloaliphatic or aliphatic thiol typically having from 2 to approximately 24 carbon atoms, preferably 2 to 12 carbon atoms, more preferably 6 carbon atoms, and optionally having a functional group additional chosen from amino, hydroxy and carboxy groups.
- the transfer agent is chosen from thioglycolic acid, 2-mercaptoethanol, dodecanethiol, hexanethiol and their mixtures.
- the transfer agent is in particular added to the reaction mixture in an amount of 0.1% to 10%, preferably 0.5% to 8%, more preferably 1.5%. % to 6% and in particular from 1.5% to 4.5% per mole, and in particular from 3% per mole, relative to the number of moles of hydrophilic monomer a).
- the polymeric crosslinked matrix of the microspheres of the invention is further based on: - an ionized or ionizable monomer and/or - a colored monomer to make them visible to the naked eye, for example to check before injection that the suspension of microspheres is homogeneous in the syringe and to control the injection speed, and/or - at least one agent visible in magnetic resonance imaging (MRI )
- MRI magnetic resonance imaging
- ionized or ionizable group we mean, within the meaning of the present invention, a charged group or which can be found in charged form (in the form of an ion), that is to say carrying at least one positive or negative charge, depending on the pH of the medium.
- the COOH group can be ionized in the COO- form and the NH2 group can be found in the ionized NH3 + form.
- the introduction of an ionized or ionizable monomer into the reaction mixture makes it possible to increase the hydrophilicity of the resulting microspheres, thus increasing the swelling rate of said microspheres, further facilitating their injection via catheters and microcatheters.
- the ionized or ionizable monomer is a cationic monomer, advantageously chosen from the group consisting of methacrylic acid, (methacryloyloxy)ethylphosphorylcholine, 2-(dimethylamino)ethyl (meth)acrylate, (meth)acrylate of 2-(diethylamino)ethyl), 11-methacryloyloxyundecylphosphonic acid and 2-((meth)acryloyloxy)ethyl)-trimethylammonium chloride, advantageously, the cationic monomer is diethylamino)ethyl (meth)acrylate.
- the crosslinked matrix according to the invention is based on a cationic monomer mentioned above in quantities of between 1% and 40% in moles relative to the total number of moles of monomers.
- the crosslinked matrix according to the invention is based on ionized or ionizable monomer in quantities of between 5% and 15%, preferably 10% in moles relative to the total number of moles of monomers, when the resulting microspheres do not are not intended to be loaded with an active substance.
- the crosslinked matrix according to the invention is obtained by adding to the reaction mixture between 20% and 40%, preferably by adding to the reaction mixture 20% at 30% by moles of ionized or ionizable monomer relative to the total number of moles of monomers.
- the ionized or ionizable monomer is an anionic monomer advantageously chosen from the group consisting of acrylic acid, methacrylic acid, 2-carboxyethyl acrylate, 2-acrylate oligomers carboxyethyl, 3-sulfopropyl (meth)acrylate, potassium salt and 2-((methacryloyloxy)ethyl)dimethyl-(3-sulfopropyl)ammonium hydroxide.
- the crosslinked matrix according to the invention is based on an anionic monomer mentioned above in quantities of between 1% and 40% by moles based on the total quantity of monomers.
- the crosslinked matrix according to the invention is based on ionized or ionizable monomer in quantities of between 5% and 15%, preferably 10% in moles based on the total quantity of monomers, when the resulting microspheres do not are not intended to be loaded with an active substance.
- the crosslinked matrix according to the invention is based on ionized or ionizable monomer in quantities of between 20% and 40%, preferably 20% to 30% of ionized or ionizable monomer on the basis of the total quantity of monomers.
- the ionized or ionizable monomer is methacrylic acid (MA or AM).
- the crosslinked matrix according to the invention is based on methacrylic acid (MA) in quantities of between 10% and 30% by moles based on the total quantity of monomers.
- Said crosslinked polymer matrix may also be based on at least one colored monomer of general formula (VI) below: in which, ⁇ Z 1 and Z 2 represent, independently of each other, H or OR 25 , R 25 representing H or a (C 1 -C 6 ) alkyl, advantageously Z 1 and Z 2 represent H; ⁇ X represents H or Cl, advantageously H; ⁇ R 23 represents H or a (C 1 -C 6 ) alkyl, advantageously a (C 1 -C 6 ) alkyl, in particular a methyl; and ⁇ R24 represents a group chosen from (C1-C6) linear or branched alkylene, (C5-C 36 ) arylene, (C 5 -C 36 ) arylene-OR 26 , (C 5 -C 36 ) heteroarylene and (C 5 -
- (CX-CY)alkylene group is meant, within the meaning of the present invention, a divalent hydrocarbon chain, linear or branched, comprising X to Y carbon atoms, X and Y being integers between 1 and 36 , preferably 1 and 18, in particular 1 and 6.
- X and Y being integers between 1 and 36 , preferably 1 and 18, in particular 1 and 6.
- (CX-CY)heteroarylene is meant, within the meaning of the present invention, a divalent aromatic group, comprising from X to Y cyclic atoms including one or more heteroatoms, advantageously 1 to 4 and even more advantageously 1 or 2, such as for example sulfur, nitrogen or oxygen atoms, the other cyclic atoms being carbon atoms.
- X and Y are whole numbers between 5 and 36, preferably 5 and 18, in particular 5 and 10.
- “rating ramblings” we mean, in the sense of this invention, a radical having a valence of 2, c that is to say having two covalent, polar covalent or ionic chemical bonds. Said radical may comprise, for example, carbon and/or oxygen atoms.
- the colored monomer has the following formula (VIa) or (VIb): More advantageously, the colored monomer has formula (VIb) above.
- the colored monomer is in particular added to the reaction mixture in an amount of 0% to 1%, preferably 0% to 0.5%, more particularly 0.02% to 0. 2%, and even more particularly from 0.04% to 0.1% per Mole, relative to the total number of moles of monomers.
- Said crosslinked polymeric matrix may also be based on elements visible in magnetic resonance imaging (MRI) such as iron oxide nanoparticles, gadolinium chelates or magnesium chelates, advantageously iron oxide nanoparticles. .
- MRI magnetic resonance imaging
- the elements visible in MRI are advantageously added to the reaction mixture in a quantity of 0% to 0.5%, preferably from 0.025% to 0.4%, more preferably from 0.025% to 0. .25%, in particular 0.05%, in mass of element visible in MRI per volume of organic phase, so as to obtain microspheres visible and quantifiable by MRI.
- the polymeric crosslinked matrix of the embolization microspheres of the invention can be easily synthesized by numerous methods well known to those skilled in the art. For example, it can be obtained by suspension polymerization as described in application WO2021/069528, in particular on pages 27-29.
- the embolization microspheres according to the present invention are loaded with active substances, thus making it possible to combine vascular occlusion and the delivery of an active principle.
- Said active substance can be chosen from a drug, a diagnostic agent and macromolecules as defined in application WO2021/069528, in particular on pages 29-31.
- the microspheres according to the invention can be loaded with an active substance chosen from anticancer agents, anti-inflammatory agents, local anesthetics, analgesics, antibiotics, steroids, antiseptics and mixtures thereof.
- the anticancer agent is preferably chosen from anthracyclines such as doxorubicin, epirubicin or idarubicin, platinum complexes, compounds related to anthracyclines such as mitoxantrone and nemorubicin, antibiotics such as mitomycin C (Ametycin ®), bleomycin and actinomycin D, other antineoplastic compounds such as irinotecan, 5-Fluoro-Uracil (Adrucil®), sorafenib (Nevaxar®), sunitinib (Sutent®), regorafenib , brivanib, orantinib, linsitinib, erlotinib, cabozantinib, foretinib, tivantinib, fotemustine, tauromustine (TCNU), carmustine, cytosine C, cyclophosphonamide, cytosine arabinoside (or cy
- the anticancer agent is chosen from anthracyclines, immunostimulants, platinum complexes, antineoplastics and mixtures thereof. Even more preferably, the anticancer agent is chosen from anthracyclines, antibodies, antineoplastic agents and their mixtures.
- the antibodies are for example chosen from anti-PD-1, anti-PD-L1, anti-CTLA-4, anti-CEA (CarcinoEmbryonic Antigen) or a mixture of these.
- Anti-PD-1 agents are, for example, nivolumab or pembrolizumab.
- Anti-PD-L1 agents are, for example, avelumab, durvalumab or atezolizumab.
- Anti-CTLA-4 agents are, for example, ipilimumab or tremelimumab.
- the anticancer drug is chosen from the group consisting of paclitaxel, doxorubicin, epirubicin, idarubicin, irinotecan, GM-CSF (Granulocyte-macrophage colony-stimulating factor), tumor necrosing Factor-alpha (TNFalpha), antibodies, and their mixtures.
- the local anesthetic is chosen from lidocaine, bupivacaine and their mixtures.
- the anti-inflammatory can be chosen from ibuprofen, niflumic acid, dexamethasone, naproxen and mixtures thereof.
- the microspheres can be loaded, in particular by extemporaneous adsorption, with macromolecules chosen from the group consisting of enzymes, antibodies, cytokines, growth factors, coagulation factors, hormones. , plasmids, antisense oligonucleotides, siRNA, ribozymes, DNA enzyme (also called DNAzyme), aptamers, anti-inflammatory proteins, bone morphogenic proteins (BMP), pro-angiogenic factors, vascular endothelial growth (VEGF) and TGF-beta inhibitors, and angiogenesis inhibitors or anti-tyrosine kinases and mixtures thereof.
- macromolecules chosen from the group consisting of enzymes, antibodies, cytokines, growth factors, coagulation factors, hormones. , plasmids, antisense oligonucleotides, siRNA, ribozymes, DNA enzyme (also called DNAzyme), aptamers, anti-inflammatory proteins, bone morphogenic proteins (BMP), pro-ang
- Anti-inflammatory proteins are for example infliximab or rilonacept and their mixture.
- Pro-angiogenic factors are for example fibroblast growth factors (FGF) and their mixture.
- Angiogenesis inhibitors are, for example, bevacizumab, ramucirumab, nesvacumab, olaratumab, vanucizumab, rilotumumab, emibetuzumab, aflibercept, ficlatuzumab, pegaptanib and mixtures thereof.
- Anti-tyrosine kinases are for example lenvatinib, sorafenib, sunitinib, pazopanib, vandetanib, axitinib, regorafenib, cabozantinib, fruquintinib, nintedanib, anlotinib, motesanib, cediranib, sulfatinib, dovetinib, linifanib and their mixtures.
- the microspheres can be loaded with macromolecules chosen from anti-tyrosine kinases, TGF-beta, angiogenesis inhibitors and mixtures thereof.
- the active substance is typically adsorbed on the crosslinked matrix by non-covalent interactions, possibly in the presence of pharmaceutically acceptable excipient(s) well known to those skilled in the art.
- This particular way of trapping active substances is called physical encapsulation.
- No special requirements are imposed on the active substance to be loaded. Loading can be done by numerous methods well known to those skilled in the art such as passive adsorption (swelling of the crosslinked matrix in a drug solution) or by ionic interaction. These methods are for example described in international application WO 2012/120138, in particular from page 22 line 20 to page 26 line 7.
- the efficiency of loading depends mainly on the compatibility between the two structures and/or favorable interactions.
- Another object of the invention relates to a pharmaceutical composition
- a pharmaceutical composition comprising embolization microspheres according to the invention, in association with a pharmaceutically acceptable vehicle, advantageously for administration by injection.
- a pharmaceutically acceptable carrier includes, but is not limited to, water for injection, saline also known as saline, starch, hydrogel, polyvinylpyrrolidone, polysaccharide, hyaluronic acid ester, plasma, a contrast agent for X-ray, magnetic resonance or ultrasound imaging, a buffering agent, a preservative, a gelling agent, glucose and/or a surfactant.
- the pharmaceutically acceptable vehicle is physiological saline, water for injection, a contrast agent for X-ray, magnetic resonance or ultrasound imaging, or mixtures thereof.
- the pharmaceutically acceptable carrier is saline, a contrast agent for X-ray, magnetic resonance or ultrasound imaging, or a mixture of saline and a contrast agent for ray imaging.
- the contrast agent is preferably a contrast agent for X-ray imaging.
- non-ionic iodinated water-soluble contrast agent such as for example iobitridol (Xenetix ® ), iopamidol (Iopamiron ® , Isovue ® ), iomeprol (Iomeron ® ), ioversol (Optiray ® , Optiject ® ), iohexol (Omnipaque ® ), iopentol (Imagopaque ® ), ioxitol (Oxilan®), iopromide (Ultravist ® ), metrizamide (Amipaque ® ), iosarcol (Melitrast ® ), iotrolan (Isovist ® ), iodixanol (Visipaque ® ), iosimenol and iosimide (Univist ® ) and a mixture thereof
- the contrast agent is a contrast agent for magnetic resonance imaging (MRI). These are advantageously gadolinium chelates (Dotarem®, Gadopiclenol).
- the contrast agent is a contrast agent for ultrasound imaging. It is advantageously sulfur hexafluoride (Sonovue®).
- the pharmaceutical composition comprises embolization microspheres according to the invention, in association with physiological serum, said composition being intended to be mixed with at least one contrast agent for imaging by X-ray, by magnetic resonance or by ultrasound as defined above, in particular for X-ray imaging, before administration by injection, such a mixture resulting in the suspension of the microspheres according to the invention.
- the pharmaceutical composition according to the invention comprises embolization microspheres according to the invention, in association with a mixture of physiological serum and a contrast agent as defined above , the physiological serum and the contrast agent being present in proportions 70/30 to 20/80, advantageously 50/50 to 20/80, preferably 50/50.
- the pharmaceutical composition must have an acceptable viscosity for injection.
- the embolization microspheres according to the invention can, as indicated above, be used for various biomedical purposes, which means that they must be compatible with the human body or the body of a mammal. More particularly, suitable biomedical materials do not possess hemolytic properties.
- the present invention also relates to a kit comprising a pharmaceutical composition as defined above and at least one means of injecting said composition, for administration of said composition parenterally.
- injection means means any means allowing parenteral administration.
- said injection means is one or more syringes and/or one or more syringe(s) which can be prefilled and/or one or more catheter(s) or microcatheter(s) for administration of said composition by injection.
- the pharmaceutical composition present in said kit comprises the microspheres according to the present invention in association with physiological serum, a contrast agent, or their mixture.
- said pharmaceutical composition comprises the microspheres according to the present invention in association with a mixture of physiological serum and a contrast agent in proportions between 80/20 and 0/100, advantageously between 70/30 and 40/ 60, preferably 50/50.
- the injection means present in the kit according to the invention is suitable for parenteral administration of the pharmaceutical composition according to the invention.
- the size of the syringe(s) or (micro)catheter(s) will be adapted according to the size of the microspheres according to the invention and the volume to be injected for embolization. A person skilled in the art will know how to choose the appropriate injection means.
- said injection means is the Vectorio® device as described in applications WO2016/166346, WO2016/166339, WO2017/005914 and WO2017/081178.
- the present invention also relates to a kit comprising on the one hand a pharmaceutical composition as defined above and on the other hand at least one contrast agent for X-ray, magnetic resonance or ultrasound imaging, and optionally at least one injection means for parenteral administration.
- the injection means is as defined above.
- the pharmaceutical composition and the contrast agent are packaged separately and are intended to be mixed just before administration by injection.
- the at least one contrast agent is as defined above in the description.
- the at least one contrast agent is a contrast agent for X-ray imaging as defined above in the description.
- the pharmaceutical composition advantageously comprises the microspheres according to the present invention in association with a pharmaceutically acceptable vehicle for administration by injection.
- Said pharmaceutically acceptable carrier may be for example, but not limited to, water for injection, physiological serum, starch, hydrogel, polyvinylpyrrolidone, polysaccharide, ester of hyaluronic acid, glucose and/or plasma.
- the pharmaceutical composition advantageously comprises the microspheres according to the present invention in association with physiological serum or water for injection.
- the pharmaceutical composition is advantageously packaged directly in an injection means, in particular in a syringe, suitable for the injection of parenteral embolization microspheres.
- the contrast agent is advantageously packaged in a bottle or directly in an injection means, in particular a syringe, in particular suitable for the injection of embolization microspheres via the parenteral route.
- the pharmaceutically acceptable vehicle/contrast agent proportions are between 50/50 and 0/100, advantageously between 40/60 and 0/100, preferably 30/70 to 0/100.
- O-alkylation intermediate 1 In a 10 mL flask, tri-iodophenol (200 mg; 0.42 mmol) is dissolved in 2.2 mL of ethanol. NaOH (15 mg; 0.375 mmol) is added, then the mixture is stirred for 30 minutes at room temperature. Following stirring, evaporation is carried out under vacuum until a slightly yellow solid is obtained. In a three-necked bottle, equipped with a condenser, placed under nitrogen, NaI (57 mg; 0.375 mmol) and 2-[(2-Chloroethoxy) ethoxy] ethanol (55 ⁇ L; 0.375 mmol) are added. The mixture is dissolved in 1.7 mL of ethanol until the NaI is completely dissolved.
- the tri-iodophenol derivative previously dissolved in 0.7 mL of ethanol, is then added.
- the reaction medium is heated to reflux for 2 and a half days, ensuring a sufficiently high flow rate of water in the refrigerant, so as to observe rapid condensation of the ethanol.
- the progress of the reaction is followed by TLC (thin layer chromatography): Heptane/ethyl acetate 5/5.
- the reaction medium is evaporated under pressure, then the solid obtained is dissolved in a 6 mL solution of NaOH (6M).
- the aqueous phase is then washed with DCM (dichloromethane) (3 x 7 mL).
- the organic phases are dried under MgSO4. A yellowish solid is obtained.
- reaction medium is cooled to a temperature below 5°C, then the methacrylate anhydride (0.11 mL; 0.66 mmol) is added dropwise over a period of 5 minutes. Finally, the reaction medium is stirred for one hour at a temperature below 5°C, then at reflux overnight. The progress of the reaction is monitored by TLC: Heptane/ethyl acetate 5/5. At the end of the reaction, the reaction medium is brought to room temperature, then suspended in 90 mL of water for one hour. A wash is carried out with dichloromethane (3 x 20 mL).
- Example 2 Synthesis by oil-in-water suspension polymerization (direct phase) of microspheres according to the invention based on MAETIP, of size 100-300 ⁇ m, 300-500 ⁇ m and 700-900 ⁇ m.
- the synthesis parameters are adapted to the desired size of microspheres (see table 1)
- a) Preparation of the aqueous phase An aqueous solution of hydrolyzed polyvinyl alcohol (PVA) and sodium chloride is prepared according to the following protocol: i) Dissolution of the PVA in 5L of pyrogen-free water and stirring overnight at 50°C. ii) Adding NaCl and stirring at room temperature for 4 hours.
- PVA polyvinyl alcohol
- step b) The organic phase obtained in step b) is then introduced into the reactor. Agitation is applied with a propeller-type stirrer to obtain dispersed phase droplets of the desired diameter. The temperature is then increased to 80°C and stirring is maintained for 8 hours. The mixture is then filtered with a 50 ⁇ m sieve and the microspheres are washed with acetone, then with ethanol then with water before being sieved with sieves of size 50 ⁇ m, 100 ⁇ m, 300 ⁇ m and 500 ⁇ m, 700 ⁇ m, 900 ⁇ m and 1200 ⁇ m.
- Example 3 Measurement of the suspension time of MS according to the invention and comparison with MS comprising another radio-opaque monomer than MAETIP
- the suspension time of MS according to the invention synthesized at Example 1 in an injection medium 50/50 physiological serum/iodized contrast agent
- the control MS are synthesized according to the same protocol as that of Example 1 with the same constituents with the exception of the radiopaque monomer.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22305941.1A EP4299080A1 (fr) | 2022-06-28 | 2022-06-28 | Monomère radio-opaque et microsphères d'embolisation le comprenant |
| PCT/EP2023/067727 WO2024003184A1 (fr) | 2022-06-28 | 2023-06-28 | Monomère radio-opaque et microsphères d'embolisation le comprenant |
Publications (1)
| Publication Number | Publication Date |
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| EP4547288A1 true EP4547288A1 (fr) | 2025-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22305941.1A Withdrawn EP4299080A1 (fr) | 2022-06-28 | 2022-06-28 | Monomère radio-opaque et microsphères d'embolisation le comprenant |
| EP23733790.2A Pending EP4547288A1 (fr) | 2022-06-28 | 2023-06-28 | Monomère radio-opaque et microsphères d'embolisation le comprenant |
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| Application Number | Title | Priority Date | Filing Date |
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| EP22305941.1A Withdrawn EP4299080A1 (fr) | 2022-06-28 | 2022-06-28 | Monomère radio-opaque et microsphères d'embolisation le comprenant |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20250387530A1 (fr) |
| EP (2) | EP4299080A1 (fr) |
| JP (1) | JP2025521863A (fr) |
| KR (1) | KR20250029149A (fr) |
| CN (1) | CN119816330A (fr) |
| AU (1) | AU2023298072A1 (fr) |
| CA (1) | CA3259734A1 (fr) |
| WO (1) | WO2024003184A1 (fr) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2451488A2 (fr) * | 2009-07-07 | 2012-05-16 | Bartling, Sönke | Matériau d'embolisation polymère visible multimodal |
| ES2632769T3 (es) | 2011-03-09 | 2017-09-15 | Occlugel | Polímero biorreabsorbible hinchable implantable |
| US10064948B2 (en) | 2011-03-09 | 2018-09-04 | Occlugel | Implantable bio-resorbable polymer charged with fragile macromolecules |
| FR3034997B1 (fr) | 2015-04-15 | 2021-04-16 | Guerbet Sa | Robinet medical, kit comprenant un tel robinet et methode de preparation d'un melange ou d'une emulsion. |
| FR3034998B1 (fr) | 2015-04-15 | 2021-02-12 | Guerbet Sa | Robinet medical, kit comprenant un tel robinet et methode de preparation d'un melange ou d'une emulsion. |
| FR3038518A1 (fr) | 2015-07-08 | 2017-01-13 | Guerbet Sa | Seringue et son procede d'assemblage |
| FR3043561B1 (fr) | 2015-11-12 | 2021-11-26 | Guerbet Sa | Seringue |
| US12552891B2 (en) | 2019-10-07 | 2026-02-17 | Guerbet | Non-degradable embolisation microsphere |
| EP4041319A1 (fr) | 2019-10-07 | 2022-08-17 | Guerbet | Microsphere d'embolisation non degradable radio-opaque |
-
2022
- 2022-06-28 EP EP22305941.1A patent/EP4299080A1/fr not_active Withdrawn
-
2023
- 2023-06-28 CA CA3259734A patent/CA3259734A1/fr active Pending
- 2023-06-28 EP EP23733790.2A patent/EP4547288A1/fr active Pending
- 2023-06-28 KR KR1020257002108A patent/KR20250029149A/ko active Pending
- 2023-06-28 JP JP2024577413A patent/JP2025521863A/ja active Pending
- 2023-06-28 AU AU2023298072A patent/AU2023298072A1/en active Pending
- 2023-06-28 CN CN202380050807.3A patent/CN119816330A/zh active Pending
- 2023-06-28 WO PCT/EP2023/067727 patent/WO2024003184A1/fr not_active Ceased
- 2023-06-28 US US18/879,667 patent/US20250387530A1/en active Pending
Also Published As
| Publication number | Publication date |
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| KR20250029149A (ko) | 2025-03-04 |
| CA3259734A1 (fr) | 2024-01-04 |
| JP2025521863A (ja) | 2025-07-10 |
| US20250387530A1 (en) | 2025-12-25 |
| WO2024003184A1 (fr) | 2024-01-04 |
| AU2023298072A1 (en) | 2025-02-06 |
| CN119816330A (zh) | 2025-04-11 |
| EP4299080A1 (fr) | 2024-01-03 |
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