摘要:
The present invention relates to a composition comprising at least one active ingredient with low aqueous solubility, said active ingredient being present therein in a form noncovalently associated with nanoparticles formed by at least one POM polymer of formula (I), and in which said active ingredient is present in a proportion of at least 5 μmol/g of POM.It is also directed towards the use of such nanoparticles, noncovalently associated with an active ingredient, with a view to increasing the aqueous solubilization of said active ingredient.
摘要:
The present invention relates to a novel solid composition, useful for treating hepatitis, in particular hepatitis C, comprising at least one interferon alpha and at least one grafted poly(glutamic acid) having an average molar mass ranging from 26,000 to 40,000 g/mol, preferably approximately 33,000 g/mol and carrying grafts of alpha-tocopherol at an average molar grafting rate ranging from 4.5 to 5.5%, preferably approximately 5%, the interferon alpha and said grafted poly(glutamic acid) being present in a grafted poly(glutamic acid)/interferon alpha weight ratio ranging from 21 to 125.It also relates to the use of such a solid composition for the preparation of a liquid composition by the addition of an aqueous liquid.
摘要:
The present invention relates to novel pharmaceutical formulations based on stable, fluid aqueous colloidal suspensions for the prolonged release of active principle(s), particularly protein active principle(s), and to the applications, especially therapeutic applications, of these formulations.The object of the invention is to propose a fluid pharmaceutical formulation for the prolonged release of active principle(s) that makes it possible, after parenteral injection, to increase significantly the in vivo release time of a therapeutic protein while at the same time reducing the plasma concentration peak of the active protein, said formulation furthermore being stable on storage and also being biocompatible, biodegradable, non-toxic and non-immunogenic and having a good local tolerance.The formulation according to the invention is an aqueous colloidal suspension of low viscosity based on submicronic particles of water-soluble biodegradable polymer PO carrying hydrophobic groups (HG), said particles being non-covalently associated with at least one active principle (AP) and forming a gelled deposit at the injection site, this gelling being caused by a protein present in the physiological medium.
摘要:
The present invention aims to propose novel microparticle oral forms for the modified release of active ingredient(s), in particular protein or peptide in nature. It also relates to the uses, in particular therapeutic or cosmetic, of these microparticle oral forms.
摘要:
The invention relates to liquid pharmaceutical formulations for oral administration with the modified release of active principle(s), excluding amoxicillin, said formulations consisting of suspensions of coated particles of active principles (microcapsules). According to the invention, the microcapsules constituting the disperse phase of the suspension are designed to allow the modified release of the active principle(s) according to a profile that does not change during the storage of the liquid suspension. To do this the inventors propose the selection of a specific coating composition for the microcapsules which consists of at least four components that allow these microcapsules to be stored in water without modifying their properties of modified release of the active principle, this liquid phase furthermore being saturated with active principle(s).
摘要:
The invention relates to liquid pharmaceutical formulations for oral administration with the modified release of amoxicillin, said formulations consisting of suspensions of coated particles of amoxicillin (microcapsules). According to the invention, the microcapsules constituting the disperse phase of the suspension are designed to allow the modified release of the amoxicillin according to a profile that does not change during the storage of the liquid suspension. To do this the inventors propose the selection of a specific coating composition for the microcapsules which consists of at least four components that allow these microcapsules to be stored in water without modifying their properties of modified release of the amoxicillin, this liquid phase furthermore being saturated with amoxicillin.
摘要:
A plant treatment composition for application of an anionic exogenous chemical substance such as glyphosate to foliage of a plant is provided. The composition comprises, in addition to the exogenous chemical substance, one or more amine compound(s) each having a number n of protonatable amino groups, n being at least 1, and having the formula (I) R—NR—((CH2)p—CHR4—NR)q—R (I) wherein q is an integer of 0 to 9, each p is independently an integer of 1 to 5, each R4 group is independently hydrogen or a C1-5 alkyl group, and R groups are independently selected from hydrogen, C1-5 hydrocarbyl groups and linear or branched, saturated or unsaturated C6-22 hydrocarbyl or acyl chains that are (a) unsubstituted or substituted at one or a plurality of carbon atoms with a functional group independently selected from hydroxyl, carboxy, carbamyl, mercapto and cyano groups and (b) uninterrupted or interrupted by one or a plurality of functional linkages independently selected from ether, thioether, sulfoxide, ester, thioester and amide linkages, and terminated by an uninterrupted hydrocarbyl segment having at least 6 carbon atoms; with the proviso that one to three R groups are such C6-22 hydrocarbyl or acyl chains, of which at least one is so substituted and/or interrupted. The exogenous chemical substance and amine compound(s) of formula (I) are dissolved or dispersed in an agronomically acceptable liquid carrier, preferably water. Also provided are a liquid concentrate composition which, upon dilution with water, forms a plant treatment composition, and a process for making such a liquid concentrate composition. Plant treatment compositions of the invention are useful for eliciting a biological activity, for example herbicidal activity, in a plant.
摘要:
The invention relates to a microparticulate system for the delayed and controlled release of active principles (AP) whose absorption window in vivo is essentially limited to the upper parts of the gastrointestinal tract, this system being intended for oral administration. The object of the invention is to provide a system ensuring that the AP is released with certainty by means of a dual mechanism of “time-dependent” and “pH-dependent” release. To achieve this object, the invention proposes a multimicrocapsular oral galenical form which is designed so as to guarantee therapeutic efficacy, and in which the release of the AP is governed by a dual release triggering mechanism that is “time-triggering” and “pH-triggering”. This system comprises of microcapsules (200 to 600 μm) comprising a core of AP coated with a film (maximum 40% by weight) comprising a hydrophilic polymer A (Eudragit® L) and a hydrophobic compound B (vegetable wax, melting point=40-90° C.), B/A being between 0.2 and 1.5. These microcapsules have a dissolution behavior in vitro such that, at a constant pH of 1.4, a latency phase of between 1 and 5 hours is observed, followed by a release of the AP, and such that the change from pH 1.4 to pH 6.8 results in a release of the AP without a latency period in vitro.
摘要:
The invention concerns liquid pharmaceutical formulations, for oral delivery, with modified release of active principle(s) excluding amoxicillin and consisting of suspensions of coated particles of active principles (microcapsules). The microcapsules constituting the dispersed phase of the suspension are designed, according to the invention, to enable modified release of the active principle(s), in accordance with a profile which remains unaltered during the shelf life of the liquid suspension. Therefor, the invention consists in selecting a coating composition specific to the microcapsules consisting of at least four components enabling preservation of said microcapsules in water without altering their properties of modified release of the active principle, said liquid phase being furthermore saturated with active principle(s).
摘要:
The invention concerns a galenic system with prolonged/controlled release of the medicinal and/or nutritional active principle, for oral administration. The aim is to provide a system enabling to obtain with one single tolerable and acceptable dose of active principle, efficient therapeutic protection over 24 hours (increasing the bioabsorption time without affecting bioavailability). To achieve this, the invention provides a composition comprising two controlled release systems associated in series, namely: individualised coated particles (microcapsules) of active principle forming an internal phase, the coating comprising a film-forming polymer P1 (ethylcellulose), a nitrogenous polymer (polyvinylpyrrolidone), a softener (castor oil) and a lubricant (magnesium stearate), and an external phase of functional carriers: polyelectrolytic hydrophilic polymer: (alginate), neutral hydrophilic polymer (hydroxypropylmethylcellulose) and a gelling additive (calcium acetate), said composition spontaneously forming in the presence of water, a cohesive and stable composite macroscopic solid, wherein the external continuous phase is a gelled matrix including the active principle microcapsules. The invention is useful for delayed oral galenic formulation of metformin.