WO2018210999A1 - Procédé de préparation d'un gel aqueux d'acide hyaluronique - Google Patents
Procédé de préparation d'un gel aqueux d'acide hyaluronique Download PDFInfo
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- WO2018210999A1 WO2018210999A1 PCT/EP2018/062871 EP2018062871W WO2018210999A1 WO 2018210999 A1 WO2018210999 A1 WO 2018210999A1 EP 2018062871 W EP2018062871 W EP 2018062871W WO 2018210999 A1 WO2018210999 A1 WO 2018210999A1
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- Prior art keywords
- hyaluronic acid
- aqueous gel
- gel
- crosslinking
- aqueous
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/735—Mucopolysaccharides, e.g. hyaluronic acid; Derivatives thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/04—Dispersions; Emulsions
- A61K8/042—Gels
-
- 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
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/20—Polysaccharides
-
- 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
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/52—Hydrogels or hydrocolloids
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
- A61Q19/08—Anti-ageing preparations
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
- C08B37/006—Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
- C08B37/0063—Glycosaminoglycans or mucopolysaccharides, e.g. keratan sulfate; Derivatives thereof, e.g. fucoidan
- C08B37/0072—Hyaluronic acid, i.e. HA or hyaluronan; Derivatives thereof, e.g. crosslinked hyaluronic acid (hylan) or hyaluronates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
- A61K2800/805—Corresponding aspects not provided for by any of codes A61K2800/81 - A61K2800/95
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/80—Process related aspects concerning the preparation of the cosmetic composition or the storage or application thereof
- A61K2800/91—Injection
-
- 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
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/06—Flowable or injectable implant compositions
Definitions
- the subject of the present invention is a process for preparing an aqueous gel of homogeneous hyaluronic acid, the aqueous gel thus obtained and its uses, in particular for filling wrinkles and fine lines.
- Collagen has long been the filling product of choice for the face, especially for filling wrinkles and fine lines or for re-lipging.
- hyaluronic acids since the placing on the market of hyaluronic acids, they are increasingly used.
- the injection of hyaluronic acid has two advantages: an immediate mechanical filling effect and the absence of inflammatory phenomena, because of its biocompatibility.
- hyaluronic acid When administered in a linear (non-crosslinked) form, hyaluronic acid has excellent biocompatibility but is rapidly degraded by the body (in about a week).
- the life of injected products based on hyaluronic acid could be significantly prolonged until approximately 12 months by the use of cross-linked hyaluronic acid.
- the crosslinked hyaluronic acid is in the form of a cohesive gel having viscoelastic properties of particular interest for wrinkle filler products.
- the crosslinked hyaluronic acid gels are homogenized by sieving or by extrusion. These methods only allow a partial elimination of hard zones.
- the shear stress exerted on the gels causes an alteration of its structure and its viscoelastic properties. The gel subjected to sieving, filtration or extrusion is therefore not perfectly homogeneous and its viscosity is reduced. Once injected it may migrate into tissue and degrade more rapidly. Its filling properties are degraded.
- the present invention therefore proposes a process for preparing a homogeneous gel of cross-linked hyaluronic acid, in which the homogenization of the gel is obtained by rolling.
- the subject of the present invention is, according to a first aspect, a process for preparing an aqueous gel of hyaluronic acid comprising the following steps:
- step (a) homogenizing the aqueous gel formed in step (a) by rolling
- step (b) the neutralization of the aqueous gel homogenized in step (b).
- the subject of the invention is also, according to a second aspect, an aqueous gel of hyaluronic acid that can be obtained by such a method.
- the invention further relates, in a third aspect, to the cosmetic use of such an aqueous gel in the repair or reconstruction of tissues, in particular for filling wrinkles and fine lines, or said aqueous gel for its medical use. for repair or reconstruction of tissue.
- Figure 1 illustrates a rolling of the gel made between two cylinders rotating at the same tangential speed.
- Figure 2 illustrates a rolling of the gel made between three cylinders whose tangential speed increases to allow the entrainment of the gel on the surface of the adjacent cylinder.
- Figures 3, 4 and 5 illustrate the ejection forces of compositions 3, 4 and 5 of aqueous gels prepared in the exemplary embodiments.
- the present invention provides a novel process for preparing aqueous gels of hyaluronic acid.
- gel means a cohesive composition which does not flow under its own weight and which has viscoelastic properties giving it a certain deformability. The gel, if sheared, does not reform, unlike viscous fluids.
- the hyaluronic acid gels are thus distinguished from hyaluronic acid solutions.
- the distinction gel / solution can be observed by a rheological study in deformation and constant frequency at 25 ° C. in order to determine the viscous modulus G "and the elastic modulus G 'in the zone of linear viscoelasticity.
- the present invention is characterized in particular by the fact that its elastic modulus G 'is greater than the viscous modulus G "according to the definition of Winter and Chambon (1986). In the case of a viscous solution on the contrary, the viscous modulus G '' is greater than its elastic modulus G '.
- the measurements are carried out on a Discovery HR1 rheometer (TA industries) and a 40 mm plan / plane geometry in a continuous mode (strain stress 10%, frequency 1 Hz, at 25 ° C, for 120s). Samples consisting of about 1.2 ml are deposited in a gap of ⁇ .
- the hyaluronic acid gels according to the invention are preferably homogeneous.
- the term "homogeneous gel of hyaluronic acid” is intended to mean that the crosslinked hyaluronic acid is dispersed uniformly within the gel.
- the homogeneity of the hyaluronic acid gel can in particular be characterized by measuring the variation of the force of ejection of the gel through a syringe whose needle has an internal diameter of 300 ⁇ (27G TSK UTW). The measurement of the ejection force (or extrusion force) is carried out using an EZ-Test SX shimadzu force bench equipped with a 50N cell.
- the extrusion is carried out at 10 mm.min -1 and the sampling is set at 100 points "1 .
- the tests are made with long needles BD LML equipped with TSK needle 27G 1/2 ".
- the acquisition is treated between the 20th and the 140th second extrusion to ignore the constraints of contacting
- the homogeneous hyaluronic acid gel does not exhibit a variation of the extrusion force of more than ⁇ 10% with respect to the linearized extrusion force.
- the aqueous gels according to the invention comprise at least one hyaluronic acid.
- Hyaluronic acid is a linear glycosaminoglycan (GAG) composed of repeating units of D-glucuronic acid and N-acetyl-D-glucosamine linked together by alternating beta-1,4 and beta-1,3 glycosidic linkages. .
- GAG linear glycosaminoglycan
- Hyaluronic acid has the following structure:
- the hyaluronic acid used in the preparation of the aqueous gel according to the invention has a molar mass of between 1,000,000 Da and 5,000,000 Da, preferably between 1,500,000 Da and 3,500,000 Da.
- the molecular weight can in particular be determined by Waters GPCV Alliance 2000 steric exclusion chromatography, eluent NaN0 3 0.1M in water coupled in line with three Wyatt detectors: a refractometer, a viscometer and a measurement of the light diffusion.
- the hyaluronic acid is present in the aqueous hyaluronic acid gel obtained in step a) in a content of between 1 mg / ml and 300 mg / ml, preferably between 75 and 200 mg / ml, more preferably between 100 and 100 mg / ml. and 175 mg / mL.
- the aqueous gels according to the invention also comprise an aqueous phase.
- the gel may comprise water in a content ranging from 60% to 99% by weight, relative to the total weight of the composition, preferably ranging from 70% to 99% by weight, and preferably ranging from 80% to 99% by weight. % in weight.
- the gel may also comprise a water-miscible polyol at ambient temperature (25 ° C.), chosen in particular from polyols having in particular from 2 to 20 carbon atoms, preferably having from 2 to 10 carbon atoms, and preferentially having from 2 to 6 carbon atoms, such as glycerine, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, dipropylene glycol, diethylene glycol; glycol ethers (having in particular from 3 to 16 carbon atoms), such as the mono-, di- or tripropylene glycol (C1-C4) alkyl ethers, the mono, di or triethylene glycol (C1-C4) alkyl ethers; ; and their mixtures.
- a water-miscible polyol at ambient temperature (25 ° C.) chosen in particular from polyols having in particular from 2 to 20 carbon atoms, preferably having from 2 to 10 carbon atoms, and preferentially
- the water-miscible polyol may be present in the gel according to the invention in a content ranging from 0.1% to 20% by weight, relative to the total weight of the composition, and preferably ranging from 3% to 15% by weight. weight.
- the method according to the invention implements a first step a) of preparing an aqueous gel of cross-linked hyaluronic acid.
- This step a) comprises, preferably at least the crosslinking in acidic or basic medium of said hyaluronic acid in the presence of at least one crosslinking agent.
- the crosslinking is carried out in a basic medium and comprises at least the following stages:
- crosslinking in basic solution of said hyaluronic acid in the presence of at least one crosslinking agent.
- Crosslinking in a basic medium promotes the formation of ether bonds between the hyaluronic acid and the crosslinking agent, which are slowly degraded.
- the crosslinking is carried out in an acid medium and comprises at least the following stages:
- the crosslinking in an acidic medium favors the formation of ester bonds between the hyaluronic acid and the crosslinking agent, which degrade more rapidly than the ether bonds.
- the step of crosslinking hyaluronic acid comprises at least a crosslinking in basic medium of hyaluronic acid and an acid crosslinking of hyaluronic acid, so as to control the ether and ester formed, and thus the rate of degradation of the crosslinked hyaluronic acid gel thus formed.
- the crosslinking step of hyaluronic acid comprises a first crosslinking in basic medium of hyaluronic acid followed by crosslinking in acidic medium of hyaluronic acid.
- the hyaluronic acid used in the process according to the invention is typically in dry form, preferably in the form of powder or flakes.
- the hyaluronic acid may preferably be a sodium salt, a calcium salt, a zinc salt or a potassium salt of hyaluronic acid, and preferably a salt sodium.
- the content of linear hyaluronic acid dissolved in the aqueous solution (corresponding to the content of hyaluronic acid in step a)) is between 50 mg / ml and 300 mg / ml, preferably between 100 and 200 mg / ml. .
- the crosslinking of the linear hyaluronic acid dissolved in the aqueous solution is carried out in the presence of at least one crosslinking agent.
- the crosslinking agent is preferably chosen from di-functional epoxides, multifunctional epoxides, bi or polyfunctional esters, divinylsulfones, carbodiimides, formaldehyde, dialdehydes and mixtures thereof, and preferably the crosslinking agent is 1,4-butanediol diglycidyl ether (BDDE, also known under the name 1,4-Diglycidyloxybutane, Tetramethylene Glycol Diglycidyl Ether and under the name IUPAC 2- [4- (oxiran-2-ylmethoxy) butoxymethyl] oxirane.
- BDDE 1,4-butanediol diglycidyl ether
- the crosslinking agent is in particular introduced in an amount of between 10 mg and 250 mg per gram of linear hyaluronic acid introduced at the crosslinking step.
- the crosslinking step is preferably carried out at a temperature of between 30 and 70 ° C, preferably between 45 and 55 ° C, which makes it possible to catalyze the crosslinking of hyaluronic acid. Homogenization by rolling
- the aqueous gel of crosslinked hyaluronic acid prepared in step a) is then homogenized by rolling to eliminate the hard zones (aggregates formed during the crosslinking) without altering the mechanical and visco properties.
- the rolling consists of a continuous compression between at least two counter-rotating rolls, preferably three counter-rotating rolls.
- the inlet cylinder may for example rotate at a tangential speed between 0.1 ms "1 and 5 ms" 1, preferably between 0.5ms and 3m.s _1 _1.
- the rolling When the rolling is carried out between two rolls, they preferably rotate at the same tangential speed, and the gel is introduced between the two rolls, as illustrated in FIG.
- the tangential speed of the various rolls should increase to allow the entrainment of the gel on the surface of the second roll to conduct a second rolling between the 2 nd and the 3 rd roll.
- the first cylinder rotates at a tangential speed x 1
- the second could rotate at this tangential speed x 2
- the third at this tangential speed x 3 to allow double rolling of the gel.
- the spacing between the counter-rotating cylinders is between 20 ⁇ and 1 mm, preferably between 20 ⁇ and 100 ⁇ .
- the rolls may preferably be made of stainless steel, so that they can be easily cleaned, and optionally provided with a microporous or ceramic coating, capable of promoting adhesion of the gel to the surface of the rolls.
- the rolling homogenization step b) is carried out for 1 minute to 2 hours, preferably between 15 minutes and 45 minutes.
- step b) of homogenizing the aqueous gel is carried out before the step c) of neutralization, which leads to a swelling of said aqueous gel.
- step c) of neutralization the volume of aqueous gel to be homogenized by rolling is significantly less important than after swelling.
- the aqueous gel of crosslinked hyaluronic acid can be purified before or after step c) of neutralizing the aqueous gel in order to remove traces of residual crosslinking agent.
- the purification is preferably carried out by dialysis under the conditions described above.
- the dialysis purification makes it possible, in addition to removing the residual crosslinking agent, to further refine the pH obtained after neutralization and to control the osmolarity of the gel.
- the content of crosslinked hyaluronic acid present in the gel after purification is between 1 mg / ml and 60 mg / ml, preferably between 5 and 50 mg / ml.
- the aqueous gel of hyaluronic acid is neutralized in a step c).
- This neutralization is carried out by adjusting the pH to a pH between 6.5 and 7.5.
- the neutralization can be carried out by adding an acid or a base depending on whether the crosslinking has been carried out in a basic or acidic medium.
- Neutralization causes the dilution of hyaluronic acid.
- the content of crosslinked hyaluronic acid present in the gel after neutralization is between 10 mg / ml and 100 mg / ml, preferably between 20 and 80 mg / ml.
- the pH adjustment can be carried out by adding a compound such as ammonia, sodium hydroxide, sodium hydrogencarbonate, sodium bicarbonate, sodium carbonate or their derivatives or a solution of phosphate buffer (PBS "Phosphate Buffer Saline” - phosphate buffer saline solution).
- a compound such as ammonia, sodium hydroxide, sodium hydrogencarbonate, sodium bicarbonate, sodium carbonate or their derivatives or a solution of phosphate buffer (PBS "Phosphate Buffer Saline” - phosphate buffer saline solution).
- the adjustment of the pH for the neutralization can be carried out by adding a compound such as hydrochloric acid, acetic acid, phosphoric acid and sodium dihydrogenphosphate or their derivatives.
- the neutralization can be performed by dialysis. Neutralization by dialysis makes it possible to adjust the pH in a very gradual manner, which makes it possible to best preserve the mechanical and viscoelastic properties of the hyaluronic acid gel formed.
- Dialysis is a process of membrane separation of molecules or ions in solution.
- the hyaluronic acid gel according to the invention can be dialyzed against a buffer solution having a pH equal to or close to the desired final pH for the hyaluronic acid gel (target pH), c. is between 6.5 and 7.5, preferably between 6.75 and 7.2.
- the buffer solution may, for example, be a saline solution of phosphate buffer (PBS, PBS-lactic acid), tris (hydroxymethyl) methylamine (TRIS), TRIS saline solution (TBS), 4-2- hydroxyethyl-1-piperazineethanesulfonic acid (HEPES), 2- ⁇ [tris (hydroxymethyl) methyl] amino ⁇ ethanesulfonic acid (TES), 3- (N-morpholino) propanesulfonic acid (MOPS), piperazine-N acid , N'-bis (2-ethanesulfonic acid), MES (2- (N-morpholino) ethanesulfonic acid (PIPES), and sodium chloride (NaCl).
- PBS phosphate buffer
- TRIS TRIS saline solution
- HPES 4-2- hydroxyethyl-1-piperazineethanesulfonic acid
- TES 2- ⁇ [tris (hydroxymethyl) methyl] amino ⁇ ethanesul
- the buffer solution is a solution of phosphate buffer PBS ("Phosphate Buffer Saline” - salt solution of phosphate buffer) composed of an "acid” salt NaH 2 PO 4, a “basic” salt Na 2 HPO 4 and NaCl.
- PBS Phosphate Buffer Saline
- the buffer is physiologically acceptable, that is to say that it presents no risk of intolerance or toxicity during the injection of the hyaluronic acid gel according to the invention or of its contact with the tissues.
- the dialysis can be carried out in one or more baths against a buffer solution as described above.
- the dialysis can be carried out in several successive baths against buffer solutions having different pHs closer and closer to the desired final pH for the hyaluronic acid solution (target pH). It is thus possible to increase the pH more gradually according to the number of buffer baths implemented.
- the buffer used for the dialysis can be associated with a so-called neutral salt, that is to say that does not interact with the buffer, in particular one of sodium salt (NaCl) or potassium salt (KC1) in a salt concentration to reach the osmolarity of the tissues between 280 mOsmol.L ⁇ 1 and 380 mOsmol.L 1 .
- a neutral salt that is to say that does not interact with the buffer, in particular one of sodium salt (NaCl) or potassium salt (KC1) in a salt concentration to reach the osmolarity of the tissues between 280 mOsmol.L ⁇ 1 and 380 mOsmol.L 1 .
- the buffer solution may have an osmolarity of between 250 and 350 mOsm / L, preferably between 280 and 330 mOsm / L.
- step c) of neutralization causes swelling of the crosslinked hyaluronic acid gel.
- the swelling in fact leads to an increase in the volume of hyaluronic acid gel between 2 and 4 times relative to the volume of the aqueous gel of crosslinked hyaluronic acid obtained in step a).
- this swelling (and therefore the neutralization) is not or very little initiated before the rolling step b) in order to allow the use of a sufficiently narrow air gap (between 20 and 20 ⁇ m). and 1 mm) so as to effectively remove the hard areas (aggregates formed during the crosslinking) without altering the mechanical and viscoelastic properties of the gel.
- the spacing between the rollers of the rolling mill must be significantly increased to allow the passage inflated gel, occupying a larger volume.
- Such spacing greater than 1 mm between the rollers no longer makes it possible to effectively eliminate the hard zones present in the gel to guarantee its excellent homogeneity and injectability.
- the document US2013 / 0217872 in this case does not describe injectable hyaluronic acid gels, and does not seek, by rolling, to eliminate the hard zones present in the gel.
- rolling allows the neutralized gel to be mixed for a very long period of 18 to 24 hours to reach a swelling equilibrium.
- a linear hyaluronic acid can be added after the step (a) for preparing the aqueous gel of cross-linked hyaluronic acid so as to reduce the viscosity of the gel and thus to adjust its mechanical properties, in particular to reduce the force of ejection of the gel and to facilitate the filling of the syringes.
- the introduction of linear hyaluronic acid can be carried out before or after step b) of homogenization by rolling, the step c) of neutralization (dilution) or the purification step previously described. According to a preferred embodiment, the introduction of linear hyaluronic acid can be carried out before or after the previously described purification step.
- the amount of linear hyaluronic acid introduced into the crosslinked hyaluronic acid gel is preferably less than or equal to the amount of crosslinked hyaluronic acid present in the gel after neutralization and optionally purification, so as not to further dilute the acid. hyaluronic.
- the content of crosslinked hyaluronic acid present in the gel after purification is between 0.1 mg / ml and 100 mg / ml, preferably between 1 and 50 mg / ml.
- the aqueous gel of hyaluronic acid also comprises at least one additional polymer other than hyaluronic acid, such as chondroitin, cellulose, alginate, polycaprolactone, polylactic acid, polyglycolic acid, collagen, silk, PTFE and their derivatives.
- additional polymer other than hyaluronic acid such as chondroitin, cellulose, alginate, polycaprolactone, polylactic acid, polyglycolic acid, collagen, silk, PTFE and their derivatives.
- the additional polymer may be introduced during step a), before the crosslinking of the hyaluronic acid to lead to a co-crosslinking of the hyaluronic acid with the additional polymer, or after the step a) of preparing the aqueous gel crosslinked hyaluronic acid, and in particular before step b) homogenization by rolling.
- the additional polymer may for example be introduced in a content ranging from 0.1% to 5%, preferably from 0.5% to 4%.
- the aqueous gel prepared according to the process of the invention is injectable.
- injectable gel in the sense of the present invention a composition in the form of gel having injectability properties (or syringuability, that is to say ease of injection due to a more or less satisfactory flow through a needle in a syringe) satisfactory, and in particular capable of being injected by means of a syringe having a needle of internal diameter approximately equal to 300 ⁇ .
- gels preferably having a viscosity of less than or equal to 10,000 Pa.s and a loss factor (Tan6) of between 0.01 and 5 are considered to be rheologically injectable.
- the rheological measurements are carried out on a Discovery HR-1 rheometer (TA industries) and a 40 mm plan / plane geometry in a continuous mode (strain stress 10%, frequency 1 Hz, at 25 ° C). ° C, for 120s)
- the samples consist of about 1.2 ml are deposited in a gap of ⁇ .
- the maximum viscosity measurements are carried out in dynamic mode (angular frequency from 0.1 to 100 rad.s -1 )
- the samples consisting of about 1.2 ml are deposited in a gap of ⁇ .
- aqueous gel prepared according to the process of the invention can therefore be packaged in syringes in order to be injected into the tissues.
- the invention thus provides, in another aspect, a syringe containing the gel prepared according to the method of the invention, as described above.
- a syringe is particularly intended for filling wrinkles or fine lines.
- degassing can be performed before filling the syringes to remove any air bubbles.
- the aqueous gel obtained according to the present invention is intended for use in the repair or reconstruction of tissues.
- the aqueous gel according to the present invention can be used for the constitution or the substitution of biological tissues, for example as an implant, or the filling of biological tissues, for example the injection into the bone cartilages or in the joints or for the filling of the cavities of the body or face, such as wrinkles or fine lines, for the creation or increase of volumes of the face or the human body, or for the healing of the skin.
- the aqueous gel according to the present invention can be used:
- the aqueous gel according to the present invention can also be used in rheumatology.
- the aqueous gel according to the present invention can also be used as a vector of active principle, especially a therapeutic substance, such as cells, a vaccine or an insulin or estrogen-type hormone, and more generally for all the principles. assets whose controlled and / or prolonged release or release has an advantage.
- the present invention also relates to the cosmetic use of an aqueous gel according to the invention for treating or combating aging of the skin.
- composition 1 An aqueous gel of hyaluronic acid according to the invention (Composition 1) was prepared according to the following method:
- the resulting gel is then rolled using an EXAKT 50i G line tricylindrical rolling mill (Exakt, Germany).
- composition 2 An aqueous gel of comparative hyaluronic acid (Composition 2) was also prepared according to the same process, except for the rolling step which was not performed.
- the effect of rolling on the homogeneity of the gel was demonstrated by measuring the ejection force. The more the ejection force is stable during the expulsion of the product through the syringe and the needle, the more the gel is homogeneous.
- the ejection force of a Teosyal Ultradeep crosslinked hyaluronic acid aqueous gel composition was also measured, the production method of which involves a sieving / milling step as described in US patent application 2013/0237615. The result of this measurement is shown in FIG. 5. A wide variation in the ejection force during ejection is observed which demonstrates a heterogeneity of the gel.
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201880031113.4A CN110621294A (zh) | 2017-05-18 | 2018-05-17 | 制备水性透明质酸凝胶的方法 |
BR112019024106-0A BR112019024106A2 (pt) | 2017-05-18 | 2018-05-17 | Método de preparar um gel de ácido hialurônico aquoso |
CA3060431A CA3060431A1 (fr) | 2017-05-18 | 2018-05-17 | Procede de preparation d'un gel aqueux d'acide hyaluronique |
EP18724248.2A EP3624764A1 (fr) | 2017-05-18 | 2018-05-17 | Procédé de préparation d'un gel aqueux d'acide hyaluronique |
US16/609,283 US20200060959A1 (en) | 2017-05-18 | 2018-05-17 | Method for preparing an aqueous hyaluronic acid gel |
KR1020197033720A KR20200008560A (ko) | 2017-05-18 | 2018-05-17 | 수성 히알루론산 겔의 제조 방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1754397 | 2017-05-18 | ||
FR1754397A FR3066386B1 (fr) | 2017-05-18 | 2017-05-18 | Procede de preparation d'un gel aqueux d'acide hyaluronique |
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WO2018210999A1 true WO2018210999A1 (fr) | 2018-11-22 |
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PCT/EP2018/062871 WO2018210999A1 (fr) | 2017-05-18 | 2018-05-17 | Procédé de préparation d'un gel aqueux d'acide hyaluronique |
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US (1) | US20200060959A1 (fr) |
EP (1) | EP3624764A1 (fr) |
KR (1) | KR20200008560A (fr) |
CN (1) | CN110621294A (fr) |
BR (1) | BR112019024106A2 (fr) |
CA (1) | CA3060431A1 (fr) |
FR (1) | FR3066386B1 (fr) |
WO (1) | WO2018210999A1 (fr) |
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CN111617313B (zh) * | 2020-04-29 | 2022-09-06 | 天津医科大学眼科医院 | 一种眼用线性凝胶在作为临床孔源性视网膜脱离药物方面中的应用 |
CN115572396B (zh) * | 2022-12-08 | 2023-03-24 | 四川兴泰普乐医疗科技有限公司 | 一种可梯度降解的透明质酸钠凝胶及其制备方法 |
CN117298355B (zh) * | 2023-11-28 | 2024-03-08 | 常州百瑞吉生物医药股份有限公司 | 一种包裹性透明质酸凝胶组合物及其制备方法与应用 |
Citations (6)
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DE69513507T2 (de) * | 1994-03-11 | 2000-07-06 | Fidia Advanced Biopolymers S.R.L., Brindisi | Hochreactive estern von karboxylgruppen enthaltenden polysachariden und die daraus hergestellte carboxypolysaccharide |
WO2005112888A2 (fr) * | 2004-05-20 | 2005-12-01 | Mentor Corporation | Procede de preparation d'hydrogels polymeres injectables |
US20060105022A1 (en) * | 2004-11-15 | 2006-05-18 | Shiseido Co., Ltd. | Process for preparing crosslinked hyaluronic acid gel |
DE102005057593A1 (de) * | 2005-07-08 | 2007-01-11 | Schwan-Stabilo Cosmetics Gmbh & Co. Kg | Zubereitung, insbesondere kosmetische Zubereitung, sowie ihre Herstellung und Verwendung |
FR2968305A1 (fr) * | 2010-12-06 | 2012-06-08 | Teoxane | Procede de preparation d'un gel reticule |
US20130217872A1 (en) | 2011-04-26 | 2013-08-22 | Beijing Aimeike Bio-Tech Co., Ltd. | Method for producing composite gel by cross-linking hyaluronic acid and hydroxypropyl methylcellulose |
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CN1101405C (zh) * | 1997-08-22 | 2003-02-12 | 电气化学工业株式会社 | 透明质酸凝胶的制备方法、用此方法制得的透明质酸及包含这种凝胶的医用材料 |
JP4460663B2 (ja) * | 1999-02-15 | 2010-05-12 | 電気化学工業株式会社 | ヒアルロン酸ゲルスラリー及びその用途 |
EP1281722A4 (fr) * | 2000-02-03 | 2005-06-08 | Denki Kagaku Kogyo Kk | Gel de l'acide hyaluronique, son procede de production et produit medical le contenant |
WO2006051950A1 (fr) * | 2004-11-15 | 2006-05-18 | Shiseido Co., Ltd. | Methode de synthese d'un gel reticule d'acide hyaluronique |
CN101244290A (zh) * | 2007-11-30 | 2008-08-20 | 顾其胜 | 一种用于组织填充的交联透明质酸微粒凝胶的制备方法 |
CN103834053B (zh) * | 2014-02-28 | 2016-04-27 | 陕西佰傲再生医学有限公司 | 一种可注射的交联透明质酸凝胶及其制备方法 |
-
2017
- 2017-05-18 FR FR1754397A patent/FR3066386B1/fr not_active Expired - Fee Related
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2018
- 2018-05-17 WO PCT/EP2018/062871 patent/WO2018210999A1/fr not_active Application Discontinuation
- 2018-05-17 EP EP18724248.2A patent/EP3624764A1/fr not_active Withdrawn
- 2018-05-17 CA CA3060431A patent/CA3060431A1/fr active Pending
- 2018-05-17 US US16/609,283 patent/US20200060959A1/en not_active Abandoned
- 2018-05-17 KR KR1020197033720A patent/KR20200008560A/ko not_active Withdrawn
- 2018-05-17 BR BR112019024106-0A patent/BR112019024106A2/pt not_active Application Discontinuation
- 2018-05-17 CN CN201880031113.4A patent/CN110621294A/zh active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE69513507T2 (de) * | 1994-03-11 | 2000-07-06 | Fidia Advanced Biopolymers S.R.L., Brindisi | Hochreactive estern von karboxylgruppen enthaltenden polysachariden und die daraus hergestellte carboxypolysaccharide |
WO2005112888A2 (fr) * | 2004-05-20 | 2005-12-01 | Mentor Corporation | Procede de preparation d'hydrogels polymeres injectables |
US20060105022A1 (en) * | 2004-11-15 | 2006-05-18 | Shiseido Co., Ltd. | Process for preparing crosslinked hyaluronic acid gel |
DE102005057593A1 (de) * | 2005-07-08 | 2007-01-11 | Schwan-Stabilo Cosmetics Gmbh & Co. Kg | Zubereitung, insbesondere kosmetische Zubereitung, sowie ihre Herstellung und Verwendung |
FR2968305A1 (fr) * | 2010-12-06 | 2012-06-08 | Teoxane | Procede de preparation d'un gel reticule |
US20130237615A1 (en) | 2010-12-06 | 2013-09-12 | Teoxane | Process of preparing a crosslinked gel |
US20130217872A1 (en) | 2011-04-26 | 2013-08-22 | Beijing Aimeike Bio-Tech Co., Ltd. | Method for producing composite gel by cross-linking hyaluronic acid and hydroxypropyl methylcellulose |
Also Published As
Publication number | Publication date |
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FR3066386B1 (fr) | 2020-08-28 |
CA3060431A1 (fr) | 2018-11-22 |
US20200060959A1 (en) | 2020-02-27 |
CN110621294A (zh) | 2019-12-27 |
EP3624764A1 (fr) | 2020-03-25 |
FR3066386A1 (fr) | 2018-11-23 |
KR20200008560A (ko) | 2020-01-28 |
BR112019024106A2 (pt) | 2020-06-02 |
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