摘要:
Small diameter particles of biologically active molecules are produced by atomizing solutions of the molecules through a nozzle into very cold liquified gases, which immediately freeze the atomized droplets. The resulting frozen particles having diameters of approximately 10 to 90 micrometers are lyophilized to produce porous particles, suspended in a non-solvent for the molecules, and exposed to ultrasonic energy or homogenization to produce particles having diameters of 0.1 to 10 micrometers with greater than 70 to 95% of the initial biological activity of the molecules in solution.
摘要:
A process for preparing microspheres using very cold temperatures to freeze polymer-biologically active agent mixtures into polymeric microspheres with very high retention of biological activity and material. Polymer is dissolved in a solvent together with an active agent that can be either dissolved in the solvent or dispersed in the solvent in the form of microparticles. The polymer/active agent mixture is atomized into a vessel containing a liquid non-solvent, alone or frozen and overlayed with a liquified gas, at a temperature below the freezing point of the polymer/active agent solution. The cold liquified gas or liquid immediately freezes the polymer droplets. As the droplets and non-solvent for the polymer is warmed, the solvent in the droplets thaws and is extracted into the non-solvent, resulting in hardened microspheres.
摘要:
The present disclosure is related to microparticle compositions, in which the microparticles are made of nucleic acids and non-polymeric cations, which are suitable for administration to moist or aqueous target locations (e.g., the lung tissue), where the substantially spherical nucleic acid microparticles release the nucleic acids through dissolution, allowing the released nucleic acids to freely interact with the target cells.
摘要:
A method is provided that includes using an antisense approach to reverse and/or delay an autoimmune diabetes condition in vivo. The oligonucleotides are targeted to bind to primary transcripts CD40, CD80, CD86 and their combinations.
摘要:
A flexible heating cover assembly for an apparatus for heating samples of biological material with substantial temperature uniformity includes a housing having a plurality of engageable enclosure components; a resistive heater having a plurality of heater element areas; a heater backing plate providing stability to the resistive heater; a force distribution system that distributes a force over the heater backing plate; and a support plate providing stiffness for the force distribution system, wherein the arrangement of the resistive heater, the heater backing plate, the force distribution system and the support plate provide substantial temperature uniformity among a plurality of sample tubes for receiving samples of biological material. The flexible heating cover assembly improves the uniformity, efficiency, quality, reliability and controllability of the thermal response during thermal cycling of the biological material.
摘要:
Microparticles formed by mixing a macromolecule with a polymer at a pH near the isoelectric point of the macromolecule and incubating the mixture in the presence of an energy source for a predetermined length of time. The microparticles are composed of homogeneously distributed, intertwined macromolecule and polymer. Each microparticle allows aqueous fluids to enter and allows solubilized macromolecule and polymer to exit the microparticle and may be formulated to provide a sustained release of macromolecule and polymer from the interior of the microparticle when placed in an appropriate aqueous medium, such as under physiological conditions. Methods of production and methods of use for research, diagnostics and therapeutics are provided.
摘要:
Methods for processing microparticles involve providing a composition comprising a plurality of solid microparticles and at least one non-volatile material, providing a non-solvent, and exposing the composition to the non-solvent to remove at least a portion of the non-volatile material from the composition while retaining at least the microparticles.
摘要:
AS-oligonucleotides are delivered in microsphere form in order to induce dendritic cell tolerance, particularly in the non-obese-diabetic (NOD) mouse model. The microspheres incorporate antisense (AS) oligonucleotides. A process includes using an antisense approach to prevent an autoimmune diabetes condition in NOD mice in vivo and in situ. The oligonucleotides are targeted to bind to primary transcripts CD40, CD80, CD86 and their combinations.
摘要:
The present invention relates to polymeric derivatives, which can be conjugated to an amino-containing drug to improve its in vivo properties. The polymeric derivative can subsequently be released to yield the drug in its native form. Methods of preparing and using these polymeric derivatives and drug conjugates are described.
摘要:
Methods for processing microparticles involve providing a composition comprising a plurality of solid microparticles and at least one non-volatile material, providing a non-solvent, and exposing the composition to the non-solvent to remove at least a portion of the non-volatile material from the composition while retaining at least the microparticles.