摘要:
An improved contrast agent for magnetic resonance imaging comprises particles to each of which is coupled a multiplicity of chelating agents containing paramagnetic ions. In the improved agent, the position of the ion is offset from the surface of the particle so as to improve the relaxivity imparted by the contrast agent.
摘要:
Injectable contrast agents of great clinical importance for lymphography, characterized by non-water soluble particle sizes between about 5 or 10 nm and about 500 or 900 nm, which have selective distribution to lymph nodes upon percutaneous administration and can be imaged with millimeter resolution. Also disclosed are methods for performing percutaneous lymphography using these contrast agents.
摘要:
A composition for imaging a cell includes a first imaging probe and a second imaging probe that include respectively a first reporter moiety and a second reporter moiety. The first reporter moiety and the second reporter moiety form a signaling complex that produces a detectable signal when the first imaging probe and second imaging probe complex with first and second biomarkers of the cell.
摘要:
The compositions and methods of the disclosure particularly target the divalent metal transporter expressed on olfactory nerve terminals to transport divalent cation-coated or cation-containing nanoparticles to all regions of brain. It has been found that such divalent cation-containing nanoparticles, including those nanoparticles comprising manganese have affinity for the metal transport receptor proteins. Although this receptor has particular affinity for manganese, it is contemplated that other divalent ions, including magnesium, calcium, and the like may also be bound to such receptors leading to transport of the nanoparticles into the intracellular cytoplasm. Nanoparticles have been developed, therefore, as vehicles for parenteral delivery of genes, proteins and drugs. The present disclosure encompasses embodiments of nanoparticle-based compositions and methods for the use thereof for the delivery of genes, oligonucleotides, including but not limited to small interfering RNA, and other small molecule drugs, into the brain by nasal insufflation.
摘要:
Disclosed herein are theranostic nanoparticles configured for simultaneous delivery of a diagnostic moiety, drug moiety, and a gene therapy moiety. In one embodiment, the theranostic nanoparticles contain a super paramagnetic iron oxide chemotherapeutic loaded on a chitosan functionalized 2D graphene sheet with a gene therapy moiety attached to the surface of the chitosan functionalized 2D graphene sheet. Also disclosed are methods for making and administering theranositic nanoparticles configured for simultaneous delivery of a diagnostic moiety, drug moiety, and a gene therapy moiety.
摘要:
The invention relates to compositions of DOTA derivative compounds, lanthanoid-DOTA derivative molecular complex, and lanthanoid-complex encapsulated solid lipid particles or capsules, and methods of making and using the compositions. The solid lipid particles or capsules contain micelle cores stabilized by a hyperbranched polymer shell based from a crosslinked DOTA derivative compound or crosslinked lanthanoid-DOTA derivative complex. These solid lipid particles or capsules can be used in various applications, such as contrast agents or drug delivery vehicles.
摘要:
A magnetic resonance imaging enhancement agent includes a plurality of particles. Each particle including a metal core; a dielectric shell disposed on the metal core including water and at least one MRI contrast agent; and a metal shell disposed on the exterior surface of the dielectric shell that encapsulates the dielectric shell.
摘要:
Protein particles are prepared by causing or allowing protein molecules dispersed in a liquid medium at a concentration of 8 mg.mL−1 or greater to react in the presence of a zero-length crosslinker, so as to produce protein particles comprising protein molecules that are covalently bonded together. The protein particles may be produced with sizes in the sub-micron range with closely defined sizes and size distributions. The particles have applications in many fields, but are useful inter alia for the delivery of therapeutic agents and other agents, eg imaging contrast agents, to the body.
摘要:
The present disclosure, among other things, provides a composition including a nanoscale core; a plurality of capping agent entities associated on the core; an outer encapsulant layer; and a plurality of dopant entities distributed at locations selected from the group consisting of: on or within the nanoscale core, on or between capping agent entities, on or within the encapsulating layer, and combinations thereof. Provided technologies can achieve unprecedented levels of dopant entity density and/or surface localization, which, for a SE(R)RS-active agent dopant, results in dramatically improved signal intensity and/or imaging sensitivity.