摘要:
The invention provides a metal chelate forming peptide having an amino acid sequence of three amino acid residues represented by: X1-X2-Cys, wherein X1 represents an amino acid residue other than Cys residue; X2 represents an amino acid residue other than Cys residue and Pro residue; functional groups at the N-terminus, C-terminus and side chain may be substituted with protecting groups; and each of the amino acid residues may be any of D-form and L-form. Further, the invention provides a complex of the peptide with a physiologically active peptide, protein or other substance; a labeled reagent obtained by labeling the peptide or the complex with a metal radionuclide; and a radiodiagnostic and radiotherapeutic composition comprising the metal radionuclide-labeled reagent.
摘要:
The invention provides, inter alia, metal radionuclide-labelled reagent comprising a metal radionuclide coordinated with a metal chelate forming peptide having an amino acid sequence of three amino acid residues represented by: X1-X2-Cys, wherein X1 represents an Asp residue, a Tyr residue or a Lys residue; X2 represents an amino acid residue other than a Cys residue and a Pro residue, provided that X2 does not represent a Gly residue when X1 represents an Asp residue; wherein functional groups at the N-terminus, C-terminus and side chain may be optionally substituted with protecting groups; and wherein each of the amino acid residues may be either D-form or L-form.
摘要:
A peptide having affinity with tumor or a salt thereof, which comprises an amino acid sequence containing 20 or less amino acid residues, said amino acid sequence being described as X.sub.1 -YCAREPPT-X.sub.2 wherein A, C, E, P, R, T and Y represent amino acid residues expressed by standard one-letter symbols, each of amino acid residues A, C, R and Y in the amino acid sequence YCAR may be in either L-form or D-form, X.sub.1 represents a basic organic compound having 1-3 amino groups, and X.sub.2 represents any given amino acid sequence, is provided together with a radioactive diagnostic agent and a radioactive therapeutic agent containing the above peptide or a salt thereof. The present tumor affinity peptide is high in radioactive metal labeling yield, useful for imaging and treating pathological tissues such as of breast cancer, ovarian cancer and colon cancer of mammals including human, and difficult to be readily metabolized in organisms and to accumulate in normal tissues especially at kidney and liver.
摘要:
A peptide having affinity with inflammation is disclosed, which contains at least one of the following amino acid sequences: LLGGPS (SEQ ID NO:1), LLGGPSV (SEQ ID NO:2), KEYKAKVSNKALPAPIEKTISK (SEQ ID NO:3), KEYKCKVSNKALPAPIEKTISK (SEQ ID NO:4), KTKPREQQYNSTYR (SEQ ID NO:5), and KTKPREQQYNSTYRVV (SEQ ID NO:6), wherein A, C, E, G, I, K, L, N, P, Q, R, S, T, V, and Y represent amino acid residues expressed by standard one-letter symbols. According to the present invention, a peptide and its chemically modified substances, radioactive metal labeled peptides derived therefrom, and radioactive diagnostics comprising such peptide are provided, which are useful for imaging inflammation region and easy in preparation handling, and accumulate at inflammation site immediately after administration while being excellent in clearance into urine. The imaging is possible in several ten minutes after administration.
摘要翻译:公开了具有炎症亲和力的肽,其含有以下氨基酸序列中的至少一个:LLGGPS(SEQ ID NO:1),LLGGPSV(SEQ ID NO:2),KEYKAKVSNKALPAPIEKTISK(SEQ ID NO:3),KEYKCKVSNKALPAPIEKTISK( SEQ ID NO:4),KTKPREQQYNSTYR(SEQ ID NO:5)和KTKPREQQYNSTYRVV(SEQ ID NO:6),其中A,C,E,G,I,K,L,N,P,Q,R,S ,T,V和Y表示由标准单字母符号表示的氨基酸残基。 根据本发明,提供肽及其化学修饰物质,由其衍生的放射性金属标记肽和包含该肽的放射性诊断物,其可用于成像炎症区域并且易于制备处理,并且在紧随其后的炎症部位积聚 同时排尿良好。 在施用后几十分钟内成像是可能的。
摘要:
A compound binding to leukocytes, which comprises Met-Leu-Phe or Nle-Leu-Phe serving as the leukocyte-binding site of a formyl peptide receptor (FPR), a binding part comprising Ser or Thr elevating the binding ratios to monocytes and lymphocytes in all leukocytes, a group which can be labeled with a radioactive metal or a paramagnetic metal, and a spacer binding them shows binding properties specific to all leukocytes, i.e., neutrophils, monocytes and lymphocytes both in vivo and in vitro and can be labeled with a radioactive metal or a paramagnetic metal. Owing to these characteristics, this compound is highly useful in SPECT image diagnosis, PET image diagnosis, MRI image diagnosis and so on wherein imaging is performed in a site with vigorous leukocyte infiltration accompanied by an immune reaction in an individual.
摘要:
A compound that comprises Met-Leu-Phe or Nle-Leu-Phe serving as the leukocyte-binding site of a formyl peptide receptor (FPR), a binding part comprising Ser or Thr that increases the binding ratio to monocytes and lymphocytes in all leukocytes, a group that can be labeled with a radioactive metal or a paramagnetic metal, and spacers binding the three moieties together shows binding properties specific to all leukocytes, i.e., neutrophils, monocytes and lymphocytes both in vivo and in vitro. Owing to this characteristic, this compound is highly useful in SPECT image diagnosis, PET image diagnosis, MRI image diagnosis and the like, for imaging sites of inflammation.
摘要:
A stabilized radiopharmaceutical composition, a kit including same, and a method for making same, where the radiopharmaceutical is (i) susceptible to either reductive degradation or radiolysis and which includes a metal complex of a radionuclide with a ligand, (ii) a first stabilizer for the radiopharmaceutical which is an amino-substituted aromatic carboxylic acid or a salt, ester or amide thereof, and (iii) a second stabilizer for the radiopharmaceutical which is a diphosphonic acid or salt thereof. The first and second stabilizers are present in an amount effective to stabilize the radiopharmaceutical, and the radiopharmaceutical is not a metal complex of the diphosphonic acid.
摘要:
The present invention provides an improved stabiliser for radiopharmaceuticals which inhibits impurities from being produced by two kinds of decomposition mechanisms and exhibits such an effect that the shelf life of a radiopharmaceutical after its preparation is prolonged as compared with conventional ones. The improvement comprises a combination of an amino-substituted aromatic carboxylic acid or its salt, ester or amide in combination with a diphosphonic acid or its salt.
摘要:
A radioactive diagnostic or therapeutic agent, which comprises a metallic element-labeled high molecular compound which comprises one unit of (1) a polyamine compound having at least three amino groups in the side chains per molecule, at least two units of (2) a chelate-forming compound having a carboxyl group, at least one unit of (3) a physiologically active substance and (4) at least two radioactive metallic elements, each unit of the chelate-forming compound (2) and the physiologically active substance (3) being combined to any of the amino groups in the side chains of the polyamine compound (1) and each of the radioactive metallic element (4) being chelate-bonded to the chelate-forming compound (2).