921 results about "Biologically active substances" patented technology

A biodegradable vehicle and filler (referred to in this invention as biodegradable vehicle), which can be mixed with one or more biologically active substances (BAS), or can be used as a biodegradable filler to fill in cavities or body tissues in animals, birds and humans. The consistency and rheology, hydrophilicity and hydrophobicity, and in vivo degradation rates of the biodegradable vehicle is controlled by modulating the molecular weight of polymers and copolymers, concentration of plasticizers, ratios of two or more plasticizer in the blends, types of polymers and copolymers, copolymer ratios, and ratios of blends of polymers with different molecular weights or different copolymers. The biodegradable vehicle is mixed with one or more BAS (which is separately stored away from the biodegradable vehicle in an appropriate container) just prior to use. Mixing of the BAS with the biodegradable vehicle can be accomplished by simply stirring the mixture with a stirring device, or by triturating the mixture or employing an ointment mill or a suitable device or apparatus or equipment that can be used for blending / mixing. Alternatively, a device, which resembles two syringes, attached together with a removable partition or a valve assembly can also be used to uniformly mix the BAS with the biodegradable vehicle. The mixing is performed in order to dissolve or uniformly suspend the BAS particles in the biodegradable vehicle. Modulating the polymer to plasticizer ratio, polymer molecular weight, copolymer ratio, and hydrophobicity and hydrophilicity of the plasticizer controls the release of the BAS from the biodegradable vehicle.

Disclosed is an injectable, biocompatible and biodegradable composition, comprising at least one hyaluronic acid benzyl ester or auto-cross-linked derivative, in combination with at least one mammalian cell and / or at least one pharmacologically or biologically active substance and / or micro-particles such as fibres, granules, microspheres or sponge fragments of a hyaluronic acid derivative.

A poly(ethylene glycol) derivative is disclosed that is activated with a sulfone moiety for selective attachment to thiol moieties on molecules and surfaces. The activated PEG is water soluble, hydrolytically stable for extended periods, and forms hydrolytically stable linkages with thiol moieties. The linkages generally are not reversible in reducing environments. The PEG derivative is useful for modifying the characteristics of substances including modifying biologically active molecules and surfaces for biocompatibility. Methods for synthesizing the active PEG and for preparing conjugates of the active PEG and other substances, including biologically active substances, are also disclosed.

PCT No. PCT / EP96 / 05506 Sec. 371 Date Aug. 12, 1998 Sec. 102(e) Date Aug. 12, 1998 PCT Filed Dec. 10, 1996 PCT Pub. No. WO97 / 22308 PCT Pub. Date Jun. 26, 1997The invention relates to a medical implant, in particular a dental implant, intended for implantation in available cavities. Dental implants are implanted in extraction sockets. The implant is provided with reservoirs for a biologically active substance. An advantage of the implant is that, for dental procedures, it can be manufactured and implanted as part of a single therapeutic treatment. However, the implant can also be used as a release system for biologically active substances.

Multifunctional polymers are disclosed having a smart segment and a biodegradable segment. Advantageously, the biodegradable segment includes a hydrophilic segment and a hydrophobic segment. Embodiments include combining the multifunctional polymeric material with a biologically active substance in an aqueous loading environment and administering the composition as a drug delivery vehicle to a human subject.

The present invention relates to methods and apparatus for the encapsulation of biologically-active substances in various cell populations. More particularly, the present invention relates to a method and apparatus for the encapsulation of biologically-active substances in various cell populations in blood by electroporation to achieve therapeutically desirable changes in the physical characteristics of the various cell populations in blood.

A pharmaceutical or cosmetic carrier or composition for topical application characterized by rheological properties which render the carrier or composition semi-solid at rest and a liquid upon application of shear forces thereto. The composition or carrier are prepared by mixing 1-25 percent of a solidifying agent and 75-99 percent of a hydrophobic solvent, by weight, wherein at least one of them has therapeutic or cosmetic benefits, in the presence or absence of a biologically active substance.

A pharmaceutical or cosmetic carrier or composition for topical application characterized by rheological properties which render the carrier or composition semi-solid at rest and a liquid upon application of shear forces thereto. The composition or carrier are prepared by mixing 1-25 percent of a solidifying agent and 75-99 percent of a hydrophobic solvent, by weight, wherein at least one of them has therapeutic or cosmetic benefits, in the presence or absence of a biologically active substance.

A liposome-capsule dosage unit system for the delivery of a biologically active material is formed by encapsulating a biologically active materials in liposomes and then placing the liposome encapsulated material into a capsule. The capsule is typically a soft gel capsule or a two piece capsule capable of tolerating a certain amount of water. A less water tolerant capsule can be employed if the liposomes are dehydrated prior to placement within the capsule. Biologically active material include drugs, nutritional supplements, vitamins, minerals, enzymes, hormones, proteins and polypeptides. The system is especially suited for the delivery of materials with poor oral solubility, materials that are not absorbed or are poorly absorbed from the gastrointestinal tract, and materials that have conventionally been given by an invasive route. The system can be administered orally, intra-occularly, intranasally, rectally, or vaginally.

A device to enhance the delivery of a drug or other substance of interest into a selected organ or tissue, comprising special electrodes, one of the electrodes carrying a container with the selected drug or other substance of interest, said electrodes being capable of being positioned at preselected locations of said organ or tissue, wherein the electrodes are all connected with a selected energy source which generates and maintains an energy field before and during the enhanced delivery of said substance, under the influence of which delivery is accomplished in a direction from the active to the passive electrode and into said organ or tissue. The energy source may be selected from suitable sources providing an electric field, a magnetic field, ultrasonic waves, high energy waves like laser beams, or a combination thereof. Further a method for the enhanced delivery of said drug or other substance of interest to an internal organ or target tissue of an organism, for example the brain, bypassing the blood-brain barrier, is disclosed.