摘要:
This invention provides compositions and methods for enhancing delivery of drugs and other agents across epithelial tissues, including the skin, gastrointestinal tract, pulmonary epithelium, and the like. The compositions and methods are also useful for delivery across endothelial tissues, including the blood brain barrier. The compositions and methods employ a delivery enhancing transporter that has sufficient guanidino or amidino sidechain moieties to enhance delivery of a compound conjugated to the reagent across one or more layers of the tissue, compared to the non-conjugated compound. The delivery-enhancing polymers include, for example, poly-arginine molecules that are preferably between about 6 and 25 residues in length.
摘要:
In a method for characterizing the angiogenesis status of a tumor in a living subject, timed magnetic resonance images of the subject into whom a reptating polymer contrast agent containing chelating diethylentriaminepentacetic acid dosed with gadolinum has been introduced are obtained. At least two images taken at different times are compared in order to determine the percentage image enhancement in a tumor region of interest. A contrast agent including a reptating polymer containing technetium-99 is used with a nuclear medicine version of this technique.
摘要:
In a method for characterizing the angiogenesis status of a tumor in a living subject, timed magnetic resonance images of the subject into whom a reptating polymer contrast agent containing chelating diethylentriaminepentacetic acid dosed with gadolinum has been introduced are obtained. At least two images taken at different times are compared in order to determine the percentage image enhancement in a tumor region of interest.
摘要:
A biocompatible medical composition including a polymeric carrier, a protective chain linked to the polymeric carrier, and a reporter group linked to the carrier or to the carrier and the protective chain. The invention also relates to a method of treating a disease in a patient by administering to the patient a therapeutically effective amount of the composition, and may include scanning the patient using an imaging technique which can detect the reporter group to obtain a visible image of the distribution of the composition.
摘要:
In this method, one attaches one or more chelatant molecules to a mono- or polyamino intermediate compound I which is temporarily immobilized on a solid phase by a splittable bond. Thereafter, said bond is split to release the desired conjugate moiety, whereby a reactive site is generated at the splitting site. The conjugate can be coupled to a protein homing factor using said reactive site; the latter being single per chelatant molecule, undesirable cross-linking during conjugation is substantially avoided.
摘要:
Improved methods of selectively localizing, imaging and/or treating tumors, which have a net negative charge, employ novel compositions containing non-immunogenic complexes having a net positive charge in a sterile solution. The complexes contain polylysine, a linking agent bound to less than all of the lysyl groups of the polylysine, and an imaging agent or a chemotherapeutic agent which is also bound to the linking agent.
摘要:
The present disclosure relates to a heterochiral peptide complex, a self-assembled intermediate thereof, an alignment medium composition used for nuclear magnetic resonance spectroscopy residual dipolar coupling (NMR-RDC) measurement, which includes the same, and a method for NMR measurement for a biomolecule. Since the heterochiral peptide complex contains a β-sheet peptide and has superior structural stability against environmental factors such as heat, acidity and ionic strength, it is applicable as an alignment medium for measuring RDC for various biomolecules.
摘要:
Various biodegradable polyglutamate-amino acids comprising recurring units of the general formulae (I) and (II) are prepared. Such polymers are useful for variety of drug, biomolecule and imaging agent delivery applications.
摘要:
A generic structure for the peptides of the present invention includes A-X-B-C, where C is a cargo moiety, the B portion includes basic amino acids, X is a cleavable linker sequence, and the A portion includes acidic amino acids. The intact structure is not significantly taken up by cells; however, upon extracellular cleavage of X, the B-C portion is taken up, delivering the cargo to targeted cells. Cargo may be, for example, a contrast agent for diagnostic imaging, a chemotherapeutic drug, or a radiation-sensitizer for therapy. X may be cleaved extracellularly or intracellularly. The molecules of the present invention may be linear, cyclic, branched, or have a mixed structure.
摘要:
The present invention is drawn toward luminogens and chemical compositions comprising a target recognition motif, a hydrophilic moiety, a linking moiety, and at least one luminogen. Additionally presented are methods of: assessing the conversion of a prodrug into its active form, assessing the therapeutic efficacy of a prodrug, detecting glutathione in a biological sample, detecting alkaline phosphatase in a sample, and conducting fluorescence imaging or magnetic resonance imaging with the use of luminogen-containing compositions.