215 results about "Solid lipid nanoparticle" patented technology

A delivery system for active ingredients which comprises lipid nanoparticles, such as solid lipid nanoparticles (SLN) or nanostructured lipid carriers (NLC), polymerically coated, and their use in the preparation of pharmaceutical, cosmetic and/or alimentary compositions.

The present invention is in the area of administration forms and delivery systems for drugs, vaccines and other biologically active agents. More specifically the invention is related to the preparation of suspensions of colloidal solid lipid particles (SLPs) of predominantly anisometrical shape with the lipid matrix being in a stable polymorphic modification and of suspensions of micron and submicron particles of bioactive agents (PBAs); as well as to the use of such suspensions or the lyophilizates thereof as delivery systems primarily for the parenteral administration of preferably poorly water-soluble bioactive substances, particularly drugs, and to their use in cosmetic, food and agricultural products. SLPs and PBAs are prepared by the following emulsification process: (1) A solid lipid or bioactive agent or a mixture of solid lipids or bioactive agents is melted. (2) Stabilizers are added either to the lipid or bioactive agent and to the aqueous phase or to the aqueous phase only depending on their physicochemical characteristics. Stabilizers may also be added or exchanged after homogenization. (3) Drugs or other bioactive substances to be incorporated into the SLPs may be melted together with the lipids if the physicochemical characteristics of the substance permit or may be dissolved, solubilized or dispersed in the lipid melt before homogenization. (4) The aqueous phase is heated to the temperature of the melt before mixing and may contain for example stabilizers, isotonicity agents, buffering substances, cryoprotectants and/or preservatives. (5) The molten lipid compounds and the bioactive agents are emulsified in an aqueous phase preferably by high-pressure homogenization.

A composition and an associated method for hepatic targeted delivery of thyroid receptor beta1 (TRβ1) agonist to a liver of a subject. The composition includes hydrophobic nanoparticles, a liver targeting moiety exterior to each nanoparticle and covalently bonded to each nanoparticle, and at least one TRβ1 agonist encapsulated within each nanoparticle. The nanoparticles include chitosan hybrid nanoparticles, amine-modified PLGA nanoparticles, solid lipid nanoparticles, and combinations thereof. The liver targeting moiety includes Glycyrrhetinic acid (GA), Lactobionic acid (LA), or combinations thereof.

The invention provides a drug carrier that includes a solid lipid nanoparticle (SLN), wherein the SLN includes tocopherol or a derivative thereof. The invention also provides a pharmaceutical composition that includes a SLN and a biologically active compound, wherein the SLN comprises tocopherol or a derivative thereof. The present invention further provides a colloidal drug delivery system that includes solid lipid nanoparticles (SLNs), wherein the SLNs comprise tocopherol or a derivative thereof. Also provided are methods for preparing the drug carrier, pharmaceutical composition, and colloidal drug delivery system of the invention.

Various lipid nanoparticles are disclosed, including nanoparticles comprising a lipid bilayer comprising a phospholipid, a sterol, a polyethylene glycol-lipid surrounding an aqueous core which comprises a therapeutic and/or diagnostic agent and nanoparticles comprising a lipid monolayer surrounding a hydrophobic core. Of particular interest are limit size lipid nanoparticles with a diameter from 10-100 nm. Such lipid nanoparticles are the smallest particles possible for a specific particle composition. Methods and apparatus for preparing such limit size lipid nanoparticles are disclosed.

The present invention is directed to method and system for delivery of brain-targeted drugs to the cerebrospinal fluid via the perilymphatic fluid of the inner ear. The system utilizes the passage of cochlear aqueduct as a drug delivery route from the inner ear to the subarachnoid space of the brain. The delivery system includes an otological conduit which enables transfer of drugs from the auditory ear canal to the inner ear and a wearable dispenser for supplying drugs to the otological conduit. The drug composition comprises a suspension of solid lipid nanoparticles (SLN) which facilitate delivery through the cochlear aqueduct. Employing aspects of present invention, a method and system for treating chronic pain is described.

The invention provides novel solid lipid nanoparticles for protein medicaments and a preparation method thereof. Each solid lipid nanoparticle consists of two parts, namely a core and a shell, wherein the core is that a biosurfactant forms a micelle or an aggregate to wrap active ingredients, or/and the biosurfactant and the active ingredients form a synergic aggregate; and the shell is that a solid lipid material is adopted for encapsulating the core. A novel solid lipid nanoparticle medicament delivery system has extremely high safety, can effectively protect the biological activity of polypeptides and polypeptide medicaments and remarkably improve the stability of preparations of the polypeptides and the polypeptide medicaments at the same time, can be applied in multiple ways such as injection, non-injection and the like, and achieves better bioavailability.

The invention belongs to the field of medicine preparation and particularly relates to a docetaxel solid lipid nanoparticle and a preparation method thereof. The docetaxel solid lipid nanoparticle consists of an effective curative dose of docetaxel, solid lipid materials, liquid lipid materials, an emulsifying agent, additives, long-circulating auxiliary materials and water for injection. The docetaxel solid lipid nanoparticle provided by the invention has the characteristics of stable docetaxel structure, phagocytosis prevention of an in-vivo reticuloendothelial system and active tumor targeting, and can be stably stored.

The invention provides a novel nanometer lipid carrier containing a taxol substance for injection and a method for preparing the same. Mixed lipids are used as materials; liquid lipid and solid lipid with different physical states are mixed according to the proportion of between 0 and 100 percent to obtain the nanometer lipid carrier (NLC) which is prepared by a mixed solid-liquid substrate and has different crystalline states; and microemulsion (ME) prepared by a full liquid substrate and solid lipid nanoparticles (SLC) prepared by a full solid substrate are also obtained. The new nanometer lipid carrier can increase or improve the encapsulation efficiency and the release property of drug and has the characteristics of high drug-loading amount, good stability and low toxicity. The taxol substance, a carrier material, a surfactant and injection water are respectively stirred to form two phases of oil and water; the oil phase and the water phase are mixed and emulsified to obtain primary emulsion; further taxol substance nanometer lipid carrier injection or suspension type injection which meets the requirement of intravenous injection is prepared by a high-pressure homogenization process; or a protective agent is added into the injection to prepare solid powder for injection by vacuum freeze drying or spray drying; before use, normal saline, a glucose solution or a Ringer solution is used for dilution; and the solid powder can be rapidly dissolved. Experiments show that the prepared nanometer lipid carrier containing the taxol substance for injection can improve targeting property to tumor cells, improve curative effect, greatly reduce toxic and side effects, has simple preparation process and low cost and is suitable for large-scaled industrialized production.

The invention relates to curcumin and piperine carried solid lipid nanoparticles. The curcumin and piperine carried solid lipid nanoparticles are prepared from 0.1-5% of curcumin, 0.1-5% of piperine, 10%-70% of solid lipid material, 5%-30% of liquid oil phase, 10%-60% of emulsifier and the balance of water by weight percentage. A preparation method of the curcumin and piperine carried solid lipid nanoparticles can be a thin film dispersion method, a micro-emulsion method or an emulsifying evaporation-low temperature solidification method. Compared with the existing forms, the curcumin and piperine carried solid lipid nanoparticles have the advantages that the solubility of the curcumin and piperine drugs is improved, the stability and the release degree in vitro of the drugs in the nanoparticles are improved and the effects of anti-tumor and inversion of multidrug resistance of the curcumin are enhanced.

The invention relates to a neo-gambogic acid SLN (solid lipid nanoparticle) and a preparation method thereof. The neo-gambogic acid SLN comprises a therapeutically effective amount of neo-gambogic acid, medicinal phosphatide, a surfactant and a lipid material. In the invention, the neo-gambogic acid is prepared into SLNs (solid lipid nanoparticles), thereby improving the solubility of the neo-gambogic acid, reducing the irritability, improving the bioavailability, and prolonging the action time of medicaments in a human body, in addition, the neo-gambogic acid SLNs can be gathered partially in the human body so as to play the targeted action of the SLNs and exert the anti-cancer therapeutic action of the SLNs better.

The invention discloses an emamectin benzoate solid lipid nanoparticle and a preparation method for a water dispersible granule, a suspension concentrate and wettable powder of the composition of the emamectin benzoate solid lipid nanoparticle with lufenuron, indoxacarb, pleocidin, chlorfenapyr and chlorantraniliprole. Compared with the composition preparation which is prepared by directly adopting the emamectin benzoate raw pesticide as raw material, the emamectin benzoate solid lipid nanoparticle has the advantages of improving the chemical stability of hot and cold storage, reducing the photolysis rate, prolonging efficacy time, reducing dosage, and significantly improving insecticidal effect.

This disclosure relates to a low density lipoprotein-like cationic solid lipid nanoparticle targeting liver cells including parenchyma cells and non-parenchyma cells, a composition for liver target delivery, a composition for diagnosis and/or treatment of liver disease comprising the same, and a method for liver targeting of an active ingredient.

The invention belongs to the technical field of medicines, and particularly relates to a solid lipid nanometer particle for astaxanthin and a preparation method of the solid lipid nanometer particle. The solid lipid nanometer particle for the astaxanthin is prepared from lipid materials and an aqueous phase according to a weight ratio of 1:11, wherein the lipid materials comprise the following components in percentage by weight: 1-15% of solid fat, 85-98.9% of vegetable oil and 0.1% of astaxanthin; the aqueous phase comprises the following components in percentage by weight: 1-10% of surfactants and 90-99% of deionized water. A lipid kernel is arranged in the solid lipid nanometer particle provided by the invention, the aqueous phase is arranged outside the solid lipid nanometer particle for the astaxanthin, and the solubility of the astaxanthin in water is increased, so that the absorptivity and the bioavailability of fat-soluble components, i.e., the astaxanthin, in gastrointestinal tracts are improved; moreover, the solid lipid nanometer particle for the astaxanthin is in a subtransparent state, the indexes of emulsion, such as the average particle diameter, the Zeta electric potential and the dispersion index PDI, are good, isomerase and degradation are not easy to generate, and the solid lipid nanometer particle for the astaxanthin has better stability.

The invention discloses a sunscreen spray containing solid lipid microparticles and a preparation method of the sunscreen spray. The sunscreen spray containing solid lipid microparticles consists of 1-20% of solid grease, 1-20% of liquid grease, 3-15% of a solid emulsifier, 1-15% of a solid sun-screening agent, 3-25% of a liquid sun-screening agent, 0.05-10% of a wetting agent, 0.2-5.0% of a rheolobic modifier, 0.2-2.0% of a preservative, 0.1-0.5% of essence and the balance of deionized water. The preparation method comprises the following steps: dispersing an oil phase system consisting of the solid grease, the liquid grease, the solid emulsifier, the solid sun-screening agent and the liquid solid sun-screening agent with the wetting agent to an aqueous phase formed by deionized water, and mixing and homogenizing for 4 minutes to obtain a system; carrying ultrasonic treatment on the system for 6-15 minutes; then, adding the rheolobic modifier while stirring, and cooling to 40-60 DEG C and adding the preservative and essence; and then stirring and cooling to room temperature to obtain the sunscreen spray containing solid lipid microparticles.

The invention relates to a curcumin solid lipid nanoparticle with a P-gp inhibiting effect, and a preparation method and application thereof. The curcumin solid lipid nanoparticle comprises the following components according to mass ratio: 0.05-1% of curcumin, 5-15% of lipid material, 5-15% of an emulgator and the balance of water. According to the invention, the solid lipid nanoparticle technology is adopted to encapsulate curcumin, so that the stability of medicine is increased, the solubility of medicine is improved, the excretion function of small intestines is reduced, and the bioavailability of curcumin is improved. In addition, the preparation method of the curcumin solid lipid nanoparticle, disclosed by the invention, is the emulsification evaporation and low temperature solidification method which is simple and convenient and suitable for being used in a laboratory, and has low requirements for an apparatus.

The invention provides a new route of administration for sirolimus, namely that sirolimus is prepared into an external preparation for treating skin diseases. The external preparation is a prescribed preparation or compound preparation containing sirolimus, and the dosage form can be any one of pharmaceutical skin external dosage forms including cream, ointment, gel, spray, coating agent and the like, and can be any one of new external dosage forms including solid lipid nanoparticles and the like. The research shows that the external preparation containing sirolimus can be used for treating multiple immune and inflammatory skin diseases including atopic dermatitis, eczema, dermatitis, lichen planus, psoriasis, vitiligo, rosacea, sarcoidosis and the like, and is good in curative effect, high in safety and free of skin irritation. The external preparation is expected to become an important pharmaceutical preparation for clinically treating skin diseases following corticosteroids.

The invention provides a lipid carrier, an indissolvable pharmaceutical composition and a preparation method thereof. The composition includes a self-microemulsion indissolvable pharmaceutical composition and a composition composed of a solid lipid nanoparticle carrier and an indissolvable pharmaceutical. The self-microemulsion indissolvable pharmaceutical composition comprises, by weight, 0.05%-10% of an indissolvable pharmaceutical, 5%-60% of a liquid lipid, 20%-50% of a surfactant and 10%-35% of a cosurfactant; the composition composed of a solid lipid nanoparticle carrier and an indissolvable pharmaceutical comprises, by weight, 0.05%-5% of the indissolvable pharmaceutical, 40%-60% of a solid lipid and 30%-59% of the surfactant. By changing the type and the proportion of the lipid in the composition composed of a solid lipid nanoparticle carrier and an indissolvable pharmaceutical, the degree of hydrolysis can be controlled between 3%-90%, wherein the hydrolysis is carried out with a lipase. Because that the releasing rate of the indissolvable pharmaceutical in the lipid carrier is related to the hydrolysis of the lipid carrier, the purpose of changing the pharmacokinetics of the indissolvable pharmaceutical is achieved by controlling the hydrolysis rate of the lipid carrier.

The invention discloses a targeting ginkgolide B solid lipid nanoparticle and a preparation method thereof. The ginkgolide B solid lipid nanoparticle targeting a blood brain barrier is prepared with an oil-in-water emulsion process by taking a ginkgolide B as a treating medicament, taking a solid lipid material as a carrier, taking a folic acid-modified surfactant as a targeting material and taking a mixture obtained by mixing a surfactant with the folic acid-modified surfactant in a certain ratio as an emulsifier. The particle diameter is 80-200 nanometers, and the polydispersion coefficient is 0.30+/-0.10. According to the solid lipid nanoparticle, a brain targeting effect is achieved by using the folic acid-mediated phagocytosis on the surfaces of brain cells and the phagocytosis way of adsorption of a brain cell membrane by using the nanoparticle.

The invention discloses a berberine hydrochloride solid lipid nano preparation and a preparation method thereof, relates to berberine hydrochloride, and provides the berberine hydrochloride solid lipid nano preparation which has the advantages of simple method, low production cost, convenience in carrying and transportation and suitability for any administration route and the preparation method thereof. The berberine hydrochloride solid lipid nano preparation comprises the following raw materials in percentage by mass: 1 percent of berberine hydrochloride, 5-15 percent of solid lipid, 5-15 percent of emulsifier and 1-3 percent of surfactant. The solid lipid and the emulsifier are added into an organic solvent; after the solid lipid is fully dissolved, the berberine hydrochloride is added and is dissolved to obtain an oil phase; the obtained oil phase is added into a water phase containing the surfactant and is stirred until the organic solvent is fully removed; the obtained material is subjected to ultrasonography, is cooled and then is filtered by using a micro-porous filter membrane to obtain berberine hydrochloride solid lipid nanoparticle suspension; and the obtained berberine hydrochloride solid lipid nanoparticle suspension is added into a free-dry protecting agent to be freeze-dried to obtain the berberine hydrochloride solid lipid nano preparation which is in the form of nanoparticle freeze-dried powder.

The invention relates to solid lipid nanoparticles composed of lipid material and containing, as bioactive molecule, a nucleic acid, preferably an antisense oligonucleotide, preferably modified by chemical methods to achieve a greater resistance to endo- and exo-nucleases, and to the process for preparation of the nanoparticles. In the present invention, the efficiency of the delivery system represented by nanoparticles containing synthetic or natural polynucleotides allows the use of such system for transfection. The particles are especially effective in the treatment of diseases of the posterior segment of the eye (such as diabetic retinopathy, macular degeneration, etc.) and in angiogenesis.

The invention discloses a novel preparation method of solid lipid nanoparticles (SLN) (including nanostructured lipid carriers NLC), solving the unstable problem of easiness in aggregation, agglomeration, and the like of the solid lipid nanoparticles (including NLC). The preparation method comprises the steps of: a, dissolving lipid matters and lipotrophic matters (including medicines) in an organic solvent (such as tertiary butanol) capable of being mixed and dissolved with water to form an oil phase (O), or solubilizing hydrophilic matters (including medicines) in an organic solvent (O) capable of being mixed and dissolved with water by using a surfactant, wherein the lipid matters and the lipotrophic matters are used for forming the solid lipid nanoparticles (including NLC); b, dissolving water-soluble matters in water to form a water phase (W); c, injecting the oil phase (O) into the water phase (W) under stirring condition according to a proper volume proportion to obtain a solid nanoparticle dispersing solution; d, freezing and drying the obtained dispersing solution to remove the solvent to obtain a freeze-dried product; and e, hydrating the obtained freeze-dried product to obtain the solid lipid nanoparticles (including NLC). The preparation method is simple in procedures and easy to implement.