126 results about "Radioisotopic Labeling" patented technology

Methods for the treatment of lymphoma by administration of a B cell-specific antibody are described. The invention encompasses providing to a patient both unlabeled antibodies and antibodies labeled with a radioisotope. A principal advantage of the method is that tumor responses can be obtained in a radiometric dose range that does not require hematopoietic stem cell replacement as an adjunct therapy also described is a composition useful in the treatment of lymphoma.

2-arylbenzothiophene derivatives or pharmaceutically acceptable salts thereof, a preparation method thereof, and a pharmaceutical composition for the diagnosis or treatment of degenerative brain disease containing the same as an active ingredient. Since the 2-arylbenzothiophene derivatives of Formula 1 have a relatively high binding affinity for β-amyloid, they can be used as diagnostic reagents for diagnosing Alzheimer's disease at an early stage by non-invasive techniques when they are labeled with radioisotopes:

wherein R¹-R⁴, V, W, X, Y and Z are as defined in the Detailed Descript of the specification. Further, when the pharmaceutical composition containing the 2-arylbenzothiophene derivative binds with a low-molecular weight β-amyloid peptide binding compound, generation of malignant high-molecular weight β-amyloid deposits is minimized. Accordingly, the pharmaceutical composition can be used as a therapeutic agent of degenerative brain disease such as Alzheimer's disease.

The present invention provides a method for the preparation of radioisotopically-labelled imaging agent compositions. The method uses precursors which are bound to soluble polymers, so that the radiolabelling reaction is carried out in solution. Also described are radiopharmaceutical compositions, automated versions of the radiolabelling method and disposable cassettes for use in the automated method.

A neurosurgical instrument includes a radiation detecting sensor adjustably positioned proximate a distal end of an arm of the instrument. A controller is programmed to receive and process electrical signals from the sensor. The controller operates to control an audio tone generator to emit a tone of higher intensity as the surgeon moves the sensor and its associated coagulator closer to radioactively tagged malignant tissue or a brain tumor of a patient, and of lower intensity as the coagulator moves away from the tissue or tumor, thereby permitting the surgeon to accurately locate and remove the malignant tissue or brain tumor. Also, in place of or in combination with the audio tone generator, a light emitter provides for emitting light of intensity directly related to the distance the sensor is from the malignant tissue or brain tumor tagged with a radioactive isotope.

This invention relates to macrocyclic chelants comprised of one or two heteroatom-containing bridges, compositions containing them and their use in medicine, particularly in diagnostic imaging and radiotherapy. This invention relates especially to the use of metal chelates of the macrocyclic chelants as metallopharmaceuticals in Magnetic Resonance Imaging (MRI) and radiopharmaceuticals. This invention also relates to macrocyclic chelants as bifunctional chelating agents (BFC's) for the labeling of biologically active targeting molecules such as proteins, peptides, peptidomimetics, and non-peptide receptor ligands, with metal ions and radioisotopes.

A multiple modality imaging system (10) includes a MR scanner (12) which defines an MR imaging region (18), a nuclear imaging scanner (26) which defines a nuclear imaging region (34), an CT scanner (36) which defines an CT imaging region (42). Each scanner (12, 26, 36) having a longitudinal axis along which a common patient support (46) moves linearly through the MR, nuclear, and CT imaging regions (18, 34, 42). A marker (130, 140, 150), for use with the system (10), includes a radio-isotope marker (132) which is imageable by the nuclear imaging scanner (26) and the CT scanner (36) surrounded by a flexible silicone MR marker (134) which is imageable by the MR scanner (12) and the CT scanner (36). A calibration phantom(162), for use with the image scanner (10), includes a plurality of the markers (130, 140, 150) supported by a common frame having a known and predictable geometry.

Novel epidermal growth factor receptor tyrosine kinase (EGFR-TK) inhibitors, pharmaceutical compositions including same and their use in the treatment of EGFR-TK related diseases or disorders are disclosed. Novel radiolabeled EGFR-TK inhibitors as their use as biomarkers for medicinal radioimaging such as Positron Emission Tomography (PET) and Single Photon Emission Computed Tomography (SPECT) and as radiopharmaceuticals for radiotherapy are further disclosed. The disclosed EGFR-TK inhibitors comprise a polyalkylene glycol moiety and/or a hydroxy-containing moiety and are characterized by improved solubility, biostability and bioavailability. Processes of preparing the disclosed EGFR-TK inhibitors and of radiolabeling same, via, for example, one-step radiosyntheses, are also disclosed.

The present invention relates to anti-CDH3 antibodies, which can be labeled with a radioisotope. Moreover, the present invention provides methods and pharmaceutical compositions that comprise an anti-CDH3 antibody as an active ingredient. Since CDH3 is strongly expressed in pancreatic, lung, colon, prostate, breast, gastric or liver cancer cells, the present invention is useful in pancreatic, lung, colon, prostate, breast, gastric or liver cancer therapies.

A method for labeling a prostate-specific membrane antigen (PSMA) ligand with a radioactive isotope, such as ⁶⁸Ga, ¹⁷⁷Lu, or ⁹⁰Y, includes providing a reaction vial containing a sodium-based buffering agent and the PSMA ligand, both in dried form; adding a solution of the radioactive isotope in HCl to the reaction vial, thus obtaining a solution of the PSMA ligand and the radioactive isotope in the HCl; and mixing the solution and then incubating it for a sufficient period of time, thus reacting the PSMA ligand with the radioactive isotope to thereby obtain the PSMA ligand labeled with the radioactive isotope, At least 90% of the radioactive isotope in the solution is bound to the PSMA ligand. A kit can be used for carrying out the method. Radiolabeled PSMA ligands prepared by this method can be used for both imaging and therapy.

The invention is directed to heterocyclic indene derivatives useful for β-amyloid plaque imaging, their radiolabeled compounds and their preparation methods. The compounds of the invention are easily labeled with radioisotopes and have high affinities to β-amyloid depositions, thus they facilitate diagnosis of Alzheimer's disease by imaging the distribution of β-amyloid depositions.

The present invention relates to nuclear medicine using fluorescent silica nanoparticle and detecting method of optical dual imaging, and more particularly to radioisotope labeled fluorescent silica nanoparticles which are used for PET (positron emission tomography) and fluorescence detecting, and detecting method of PET and fluorescent dual imaging using thereof. Functionalized silica nanoparticles of this invention have promising potential as a role for organic lymphatic tracer in biomedical imaging such as pre- and intra-operative surgical guidance.

A method for hybridizing nucleic acids, which includes an annealing step of preparing a first single stranded nucleic acid fragment immobilized on a surface of an immobilizing material and a second single stranded nucleic acid fragment labeled with fluorescence or radioisotope and forming a complementary double strand from the first single stranded nucleic acid fragment and the second single stranded nucleic acid fragment, and an enzyme treatment step. In the annealing step, the complementary double strand is formed by performing a temperature gradient processing performed from a high temperature area to a low temperature area, and in the enzyme treatment step, a noncomplementary nucleic acid portion contained in the complementary double stand is recognized and cleaved by adding endonuclease. This method has high measurement sensitivity and the operation is simple.

The invention belongs to the field of radioactive isotope labeling preparation, and particularly relates to tritiated metronidazole and a preparation method thereof. The preparation method includes: using 2-methyl-5-nitroimidazole as a raw material to react with N-iodosuccinimide to obtain 4-iodine-2-methyl-5nitroimidazole; under catalysis of palladium carbon, enabling 4-iodine-2-methyl-5nitroimidazole and tritium gas to be in tritium-halogen exchange to generate 4-3H-2-methyl-5-nitroimidazole; enabling 4-3H-2-methyl-5-nitroimidazole to react with ethylene oxide to obtain 4-3H-metronidazole. A synthetic product is purified through a prepared liquid phase to obtain4-3H-metronidazole with high specific activity (22.08Ci/g), high radiochemical purity (greater than or equal to 98%) and high chemical purity (greater than or equal to 98%). The tritiated metronidazole can be used as a radioactive tracer in studying absorption, distribution, metabolism and residue elimination of metronidazole in animal bodies.

The invention discloses a radioisotope labeled polypeptide developer of a targeted transferrin receptor and application of the radioisotope labeled polypeptide developer. The invention particularly discloses a 68Ga chelation reaction labeling method of two polypeptide precursors and application of the two polypeptide precursors as an imaging agent in positron emission tomography (PET) of a transferrin receptor overexpressed tumor. The radioisotope labeled product has radiochemical purity of more than 95% and good in-vivo stability, can be rapidly aggregated within 5 minutes at a tumor site, has obvious tumor muscle contrast, can realize clear imaging of tumor tissues and margins, and has a certain difference between pharmacokinetics and biodistribution due to structural modification of different linking groups, so that the compound can be used as a tumor-specific imaging agent of a targeted transferrin receptor.

The invention provides a radioisotope labeled meso-porous bioglass porous scaffold. A meso-porous bioglass porous scaffold is labeled with radioisotope, and the radioisotope can be one or more of <31>Si, <32>P and <45>Ca. The radioisotope labeled meso-porous bioglass porous scaffold can effectively label the meso-porous bioglass porous scaffold, can quantitatively and intuitively detect the in vivo degradation situation of the meso-porous bioglass porous scaffold, and can be used to research the in vivo absorption and the organism distribution of the bioglass scaffold.

The invention provides a method for detecting the combination of polypeptide medicine and plasma proteins. The method comprises the following steps: marking part of the polypeptide medicine through radioactive isotopes; preparing part of the marked polypeptide medicine into a series of polypeptide medicine plasma solutions with known concentrations, quantificationally detecting the radioactivity of the polypeptide medicine plasma solutions with the known concentrations respectively, and drawing standard curves corresponding to the concentrations of the polypeptide medicine plasma solutions respectively; and preparing part of the marked polypeptide medicine into to-be-detected polypeptide medicine plasma solutions with known concentrations, performing centrifugal ultrafiltration on the to-be-detected polypeptide medicine plasma solutions, and quantificationally detecting the radioactivity of filtered solutions and unfiltered solutions, wherein the concentrations of the to-be-detected polypeptide medicine plasma solutions can be set according to plasma concentration peak values after the administration of a low dose group, a medium dose group and a high dose group in a polypeptide medicine pharmacokinetics research, so as to set the three concentrations which are approximately consistent with peak concentrations or are different from the peak concentrations with the variation amplitudes less than 10 percent.

Disclosed is a method for the measurement of a cellular process, or for the measurement of the effect of a test compound on a cellular process, in one or more different populations of cells. The method comprises providing separate samples of one or more different populations of cells adhering to support particles, the support particles comprising a scintillant substance and being adapted for cell growth. In one embodiment, different samples of cells are introduced into separate reaction vessels in a fluid medium, together with a reagent labelled with a radioisotope, in the presence or the absence of the test compound, under conditions so as to cause a portion of said radiolabelled reagent to become associated with the cells. In another embodiment, multiparameter analysis may be performed to determine the effect of a test compound on a cellular process using two or more different cell populations present in the same well. Measurement of the cellular process, or the effect of a test compound on a cellular process may be made by detecting light emission from the scintillant particles caused by radioactive decay of the radioisotope.

The invention discloses an alcohol compound-based in-situ deoxidation fluorination synthesis method and an alcohol compound-based <18>F radiolabeling method. Alkyl alcohols such as 4-phenyl-1-butanol,which are used as raw materials, react with trifluoromethylsulfonyl fluoride gas, generated by N-phenylbis(trifluoromethanesulphonimide) and potassium fluoride in a short time, under the catalysis ofan organic alkali to realize the deoxygenation fluorination reaction of alcoholic hydroxyl groups, and monofluoro-substituted compounds are obtained after separation and purification. The synthesis method has the characteristics of high atom economy, simplicity in preparation, greenness, high efficiency, high selectivity and few elimination byproducts, is suitable for large-scale production, andcan be applied to the radioactive isotope <18>F labeling process to label drug molecules containing alcoholic hydroxyl groups.

The invention belongs to the technical fields of biological analysis and detection and discloses a nano-sensor for detecting O-acetylglucosamine transferase based on a single quantum dot and a detection method of the nano-sensor. The nano-sensor comprises a cyanine 5/biotin modified peptide chain, non-radioactive uridine-acetylglucosamine and the quantum dot coated with streptavidin, wherein a cyanine 5/biotin modified peptide chain is Biotin-Ser-Thr-Pro-Val-Ser-Arg-Ala-Asn-Met-Lys-Cy5. The detection method of the nano-sensor is very simple, enzyme purification is not required, a radioactive isotope labeled sugar donor, a specific antibody and a fluorescence UDP-GlcNAc analogue do not need to be synthesized, the detection limit can be decreased to 3.47*10<-13> mol/L, and the sensitivity isvery high. The nano-sensor can be further applied to the measurement of enzyme kinetics parameters, the screening of an OGT inhibitor and the quantitative determination of OGT activity of cells.