366 results about "Tumor imaging" patented technology

Dye-peptide conjugates useful for diagnostic imaging and therapy are disclosed. The dye-peptide conjugates include several cyanine dyes with a variety of bis- and tetrakis(carboxylic acid) homologues. The small size of the compounds allows more favorable delivery to tumor cells as compared to larger molecular weight imaging agents. The various dyes are useful over the range of 350-1300 nm, the exact range being dependent upon the particular dye. Use of dimethylsulfoxide helps to maintain the fluorescence of the compounds. The molecules of the invention are useful for diagnostic imaging and therapy, in endoscopic applications for the detection of tumors and other abnormalities and for localized therapy, for photoacoustic tumor imaging, detection and therapy, and for sonofluorescence tumor imaging, detection and therapy.

Cyanine and Indocyanine dye compounds and bioconjugates are disclosed. The present invention includes several cyanine and indocyanine dyes, including bioconjugates of the same, with a variety of bis- and tetrakis (carboxylic acid) homologues. The compounds of the invention may be conjugated to bioactive peptides, carbohydrates, hormones, drugs, or other bioactive agents. The small size of compounds of the invention allows favorable delivery to tumor cells as compared to larger molecular weight imaging agents. Further, use of a biocompatible organic solvent such as dimethylsulfoxide may be said to assist in maintaining the fluorescence of compounds of the invention. The compounds and bioconjugates herein disclosed are useful in a variety of medical applications including, but not limited to, diagnostic imaging and therapy, endoscopic applications for the detection of tumors and other abnormalities, localized therapy, photoacoustic tumor imaging, detection and therapy, and sonofluorescence tumor imaging, detection and therapy.

The present invention provide purified Flt4 receptor tyrosine kinase polypeptides and fragments thereof, polynucleotides encoding such polypeptides, antibodies that specifically bind such polypeptides, and uses therefor.

A compound comprises a donor and an acceptor, wherein at least one donor ( "D" ) and at least one acceptor ( "A" ) may be arranged in an order of D-A; D-A-D; A-D-A; D-D-A-D-D; A-A-D-A-A; D-A-D-A-D; and A-D-A-D-A. The compound may be selected from the group consisting of: MTPE-TP, MTPE-TT, TPE-TPA-TT, PTZ-BT-TPA, NPB-TQ, TPE-TQ-A, MTPE-BTSe, DCDPP-2TPA, DCDPP-2TPA4M, DCDP-2TPA, DCDP-2TPA4M, TTS, ROpen-DTE-TPECM, and RClosed-DTE-TPECM. The compound may be used as a probe and may be functionalized with special targeted groups to image biological species. As non-limiting examples, the compound maybe used in cellular cytoplasms or tissue imaging, blood vessel imaging, in vivo fluorescence imaging, brain vascular imaging, sentinel lymph node mapping, and tumor imaging, and the compound may be used as a photoacoustic agent.

A composition comprising PAA nanoparticles containing a post loaded tetrapyrollic photosensitizer and an imaging agent and methods for making and using same.

Second harmonic nanoprobes for imaging biological samples and a method of using such probes to monitor the dynamics of biological process using a field resonance enhanced second harmonic (FRESH) technique are provided. The second harmonic generating (SHG) nanoprobes are comprised of various kinds of nanocrystals that do not possess an inversion symmetry and therefore are capable of generating second harmonic signals that can then be detected by conventional two-photon microscopy for in vivo imaging of biological processes and structures such as cell signaling, neuroimaging, protein conformation probing, DNA conformation probing, gene transcription, virus infection and replication in cells, protein dynamics, tumor imaging and cancer therapy evaluation and diagnosis as well as quantification in optical imaging.

The present invention discloses a bismuth selenide nanometer material, a preparation method and applications thereof. The preparation method comprises: dissolving a bismuth salt, a selenium-containing compound and a stabilizer in a solvent, carrying out an ultrasonic treatment, uniformly mixing, heating to a temperature of 80-200 DEG C, adding a reducing agent, cooling to a room temperature after completing a reaction, and carrying out centrifugation separation washing three times to obtain the bismuth selenide nanometer material with a diameter of 20-200 nm. The preparation method has characteristics of simple operation, less time consuming, low energy consumption and easy scalization. The prepared particles have a uniform particle size and good dispersity. With application of the bismuth selenide nanometer material as a living body X-ray CT imaging contrast agent, a significant imaging effect is provided compared with imaging effects of the traditional contrast agents such as an iodine reagent iopamidol and the like so as to provide important application prospects in the future tumor imaging field.

Belonging to the technical field of biomedical polymer materials, the invention discloses a beta-cyclodextrin based amphiphilic pH responsive star polymer and a preparation method thereof, a micelle system based thereon, a composite material and application thereof. The polymer has a structure shown as the formula (1) in the specification, wherein x=3-20, y=2-30, z=5-35, and n=2-10. The polymer can be reduced in situ to obtain nanogold with small particle size and good stability. The invention also provides a micelle system based on the polymer, the micelle system has strengthened entrapment ability to water-insoluble drugs, can efficiently load hydrophobic drugs, gold nanoparticles and other substances, realizes the combination of tumor imaging diagnosis and tumor chemotherapy, and improves the therapeutic efficiency of cancer. And the polymer is easy to control the proportion of each block, and can be applied to preparation of the water-insoluble drug loaded micelle system to satisfy the release requirements of different drugs.

The invention provides novel amino acid compounds of use in detecting and evaluating brain and body tumors. These compounds combine the advantageous properties of α-aminoisobutyric acid (AIB) analogs namely, their rapid uptake and prolonged retention in tumors with the properties of halogen sustituents, including certain useful halogen isotopes such as fluorine-18, iodine-123, iodine-124, iodine-125, iodine-131, bromine-75, bromine-76, bromine-77, bromine-82, astatine-210, astatine-211, and other astatine isotopes. In addition the compounds can be labeled with technetium and rhenium isotopes using known chelation complexes. The amino acid compounds disclosed herein have a high specificity for target sites when administered to a subject in vivo. Preferred amino acid compounds include [¹⁸F] FAMP, ([¹⁸F]5a) and [¹⁸F]N-MeFAMP, ([¹⁸F]5b). The invention further features pharmaceutical compositions comprised of an α-amino acid moiety attached to eiher a four, five or a six member carbon-chain ring. The labeled amino acid compounds are useful as imaging agents in detecting and/or monitoring tumors in a subject by Positron Emission Tomography (PET) and Single Photon Emission Computer Tomography (SPECT).

Functionalized second harmonic nanoprobes for imaging samples and a method of using such probes to monitor the dynamics different processeses using a variety of imaging techniques are provided. The functionalized second harmonic generating (SHG) nanoprobes are comprised of various kinds of nanocrystalline materials that do not possess an inversion symmetry and therefore are capable of generating second harmonic signals that can then be detected by conventional two-photon microscopy, and are provided with functional surface modifications that allow for targeted imaging of a variety of biological and non-biological processes and structures such as cell signaling, neuroimaging, protein conformation probing, DNA conformation probing, gene transcription, virus infection and replication in cells, protein dynamics, tumor imaging and cancer therapy evaluation and diagnosis as well as quantification in optical imaging.

The invention relates to tumor-specific heptamethine cyanine near-infrared fluorescent dye and application thereof; the near-infrared fluorescent dye is ICG-03, may be spontaneously absorbed and accumulated by various human tumor cells, may specifically gather at tumor parts other than normal cells, and accordingly may serve for accurately diagnosing tumors. Molecules described herein have better optical features than ICG, are suitable for photodynamic therapy and tumor imaging, and are good in stability. The heptamethine cyanine near-infrared fluorescent dye of the invention is suitable for the accurate diagnosis and treatment of tumors.

The invention belongs to the technical field of composite medicine materials as well as a preparation method and application thereof, more particularly discloses a nanoparticle for embedding medicinal Adriamycin. The nanoparticle has a core-shell type structure with an inner core embedded by an outer shell, wherein the inner core is embedded medicinal adriamycin, and the material for the outer shell is silicon dioxide; and the preparation method of the nanoparticle comprises the following steps of: evenly mixing cyclohexane, a surfactant and n-hexylalcohol, adding a sodium fluoride solution into the mixed solution after being evenly mixed to form a reverse-phase microemulsion; adding adriamycin and tetraethoxysilane into the reverse-phase microemulsion, and reacting to obtain a nanoparticle microemulsion system for embedding the adriamycin; adding a silylanization reagent containing functional groups into the microemulsion system, stirring for reacting, adding ethanol and demulsifying, centrifuging and then preparing the nanoparticle for embedding the medicinal adriamycin and modifying the functional groups. The nanoparticle embedding for the adriamycin has good stability, good biocompatibility, long slow-release time, large drug-loading rate, high medicine packaging rate, and the like, and has application prospect in the fields of tumor imaging and treatment.

The invention discloses an 18F-labeled compound and a pod protease targeted PET imaging probe, which relates to the technical fields of radiopharmaceuticals and nuclear medicine. The invention provides a compound shown as a formula (I), asparagine site shearing and disulfide bond reduction are carried out in a tumor microenvironment with high expression of pod protease, and a radioactive dimer 18F-1-dimer is formed by virtue of a biocompatible CBT-Cys click condensation reaction, so that the tumor imaging effect is improved. The compound with a structure shown in the formula (I) is synthesizedby adopting a one-step ion exchange 18F labeling method, the method is simple to operate, and preparative HPLC for further purification is not needed. The invention further provides the pod proteasetargeted PET imaging probe which is a compound shown in (I). The PET imaging probe has the advantages of high stability, high sensitivity, strong specificity, good safety and the like.

The invention belongs to the fields of radiopharmaceuticals and nuclear medicine and provides an imaging drug <68>Ga-NOTA-IF7 targeting Anxa1 in tumor blood vessels and a preparation method thereof. The drug <68>Ga-NOTA-IF7 is used for differential diagnosis and periodization of tumors, accurate positioning of focuses and curative effect monitoring. According to the invention, the tumor imaging drug <68>Ga-NOTA-IF7 is prepared through leaching of <68>Ga and <68>Ga-NOTA-IF7 labeling. The preparation method has the advantages of simple preparation technology, convenient operation, small consumption of time, a high labeling rate and a stable marker and facilitates further application of the drug in clinical practice, scientific research and medicinal development. The invention also provides a novel positive electron tumor imaging agent. The novel positive electron tumor imaging agent has good targeting to tumors, so tumor imaging effects are improved, and a visual tool is provided for differential diagnosis and periodization of tumors, accurate positioning of focuses and curative effect monitoring. <68>Ga-NOTA-IF7 is a labeled compound belonging to polypeptide and has the advantages of small molecular weight, low immunogenicity, good tissue penetrability, high tumor tissue affinity and good application prospects.

The invention discloses a green preparation method of sea urchin shaped nanogold and application of the nanogold in tumor imaging and treatment. Chloroauric acid is mainly used as a gold source, a stabilizer, a reducing agent and a growth inhibitor are successively added, and the nanogold is prepared by adopting a one-step synthesis method. The method is simple, mild, green and friendly to the environment. The synthesized sea urchin shaped nanogold can serve as a contrast agent to be applied to multiple medical imaging modes such as opto-acoustic imaging (PA), positron emission computed tomography imaging (PET) and infrared thermal imaging (TI), patients can obtain multiple diagnostic effects only by needing to bear one contrast agent for dose, the dosage of contrast agent can be reduced, and the toxic and side effects are thus reduced. In addition, the material can achieve conversion of light and heat under near-infrared light irradiation of 808 nm, can absorb a large number of X rays, has higher light-heat conversion efficiency, and can be used for the preparation of a therapeutic agent for light and heat treatment (PTT), radiotherapy (RT), or combined therapy of PTT/RT of tumor cells.

The invention provides an active targeting type amphipathic polypeptide nano-drug carrier and preparation and application thereof, and belongs to the technical field of biological medicines. According to an amphipathic polypeptide, an alkyl chain serves as the hydrophobic end, a polypeptide chain with active targeting functional and side chain modification fluorescent functional molecules serves as the hydrophilic end, and an anti-tumor drug is wrapped in a hydrophobic cavity of a micelle formed by self-assembling the amphipathic polypeptide. The nano-carrier can actively target tumor cells and enter the tumor cells through receptor-mediated endocytosis, the amphipathic polypeptide and phospholipid molecules have strong interaction, and the phagocytosis of a nano-drug by tumor cells is promoted. In the process, tracing can be conducted through fluorescent imaging of fluorescent functional molecules modified on the polypeptide chain, and the tumor imaging aim is realized. Finally, the anti-tumor drug is slowly released to kill tumor cells and restrain the growth of tumors. The amphipathic polypeptide nano-carrier is free of toxin, high in biocompatibility and remarkable in anti-tumor efficiency, and the tumor diagnosis and treatment can be integrated.

The invention discloses a technetium-99m labeled isocyanide-containing FAPI derivative with a structural general formula of [99mTc-(CN-FAPI) 6] < + > and a preparation method and an application thereof. The [99mTc (CNFAPI) 6] < + > complex is obtained through two steps of synthesis of a ligand CN-FAPI and preparation of [99mTc-(CNFAPI) 6] < + >. The complex is simple and convenient to prepare, high in radiochemical purity and good in stability, has relatively high uptake and good retention at tumor parts of tumor-bearing mice, has specificity in tumor uptake, and is a novel tumor imaging agentwith popularization and application values.