Physico-chemical study of the radiopharmaceuticals 99mTc-DMSA, 99mTc-EDTA and 99mTc-DTPA interaction with plasmatic proteins. 1989

R Garcia Domenech, and O Abril Mendez, and J Galvez Alvarez, and A Farga Marti
School of Pharmacy, Department of Chemical Physics, University of Valencia, Spain.

This report studies the binding rate of the radiopharmaceuticals 99mTc-DTPA, 99mTc-EDTA and 99mTc-DMSA to plasmatic proteins. The proteins bind to the tested radiopharmaceuticals in the following sequence: 99mTc-DTPA less than 99mTc-DMSA(C1) less than 99mTc-EDTA less than 99mTc-DMSA(C2) where C1 and C2 represent two different Tc-DMSA complexes. The thermodynamic study suggests a quantitative relationship of radiopharmaceutical:protein = 1:1 and an almost nonexistent influence of the temperature, which means that the interacting forces in this process are relatively weak.

UI MeSH Term Description Entries
D011485 Protein Binding The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments. Plasma Protein Binding Capacity,Binding, Protein
D001798 Blood Proteins Proteins that are present in blood serum, including SERUM ALBUMIN; BLOOD COAGULATION FACTORS; and many other types of proteins. Blood Protein,Plasma Protein,Plasma Proteins,Serum Protein,Serum Proteins,Protein, Blood,Protein, Plasma,Protein, Serum,Proteins, Blood,Proteins, Plasma,Proteins, Serum
D004113 Succimer A mercaptodicarboxylic acid used as an antidote to heavy metal poisoning because it forms strong chelates with them. DMSA,Dimercaptosuccinic Acid,2,3-Dimercaptosuccinic Acid,Butanedioic Acid, 2,3-Dimercapto-, (R*,S*)-Isomer,Chemet,Ro-1-7977,Succicaptal,Succimer Antimony Sodium Salt, (R*,S*)-Isomer,Succimer, (R*,R*)-(+,-)-Isomer,Succimer, Dipotassium Salt,Succimer, Disodium Salt,Succimer, Monosodium Salt,Succimer, Rhenium Salt,Succimer, Tin Salt,Tin Dimercaptosuccinate,meso-Dimercaptosuccinic Acid,2,3 Dimercaptosuccinic Acid,Acid, 2,3-Dimercaptosuccinic,Acid, Dimercaptosuccinic,Acid, meso-Dimercaptosuccinic,Dimercaptosuccinate, Tin,Dipotassium Salt Succimer,Disodium Salt Succimer,Monosodium Salt Succimer,Rhenium Salt Succimer,Ro 1 7977,Ro17977,Tin Salt Succimer,meso Dimercaptosuccinic Acid
D004369 Pentetic Acid An iron chelating agent with properties like EDETIC ACID. DTPA has also been used as a chelator for other metals, such as plutonium. DTPA,Diethylenetriamine Pentaacetic Acid,Pentetates,Penthanil,Ca-DTPA,CaDTPA,CaNa-DTPA,Calcium Trisodium Pentetate,DETAPAC,Indium-DTPA,Mn-Dtpa,Pentacin,Pentacine,Pentaind,Pentetate Calcium Trisodium,Pentetate Zinc Trisodium,Sn-DTPA,Zinc-DTPA,Indium DTPA,Pentaacetic Acid, Diethylenetriamine,Pentetate, Calcium Trisodium,Zinc DTPA
D004492 Edetic Acid A chelating agent that sequesters a variety of polyvalent cations such as CALCIUM. It is used in pharmaceutical manufacturing and as a food additive. EDTA,Edathamil,Edetates,Ethylenediaminetetraacetic Acid,Tetracemate,Calcium Disodium Edetate,Calcium Disodium Versenate,Calcium Tetacine,Chelaton 3,Chromium EDTA,Copper EDTA,Coprin,Dicobalt EDTA,Disodium Calcitetracemate,Disodium EDTA,Disodium Ethylene Dinitrilotetraacetate,Distannous EDTA,Edetate Disodium Calcium,Edetic Acid, Calcium Salt,Edetic Acid, Calcium, Sodium Salt,Edetic Acid, Chromium Salt,Edetic Acid, Dipotassium Salt,Edetic Acid, Disodium Salt,Edetic Acid, Disodium Salt, Dihydrate,Edetic Acid, Disodium, Magnesium Salt,Edetic Acid, Disodium, Monopotassium Salt,Edetic Acid, Magnesium Salt,Edetic Acid, Monopotassium Salt,Edetic Acid, Monosodium Salt,Edetic Acid, Potassium Salt,Edetic Acid, Sodium Salt,Ethylene Dinitrilotetraacetate,Ethylenedinitrilotetraacetic Acid,Gallium EDTA,Magnesium Disodium EDTA,N,N'-1,2-Ethanediylbis(N-(carboxymethyl)glycine),Potassium EDTA,Stannous EDTA,Versenate,Versene,Acid, Edetic,Acid, Ethylenediaminetetraacetic,Acid, Ethylenedinitrilotetraacetic,Calcitetracemate, Disodium,Dinitrilotetraacetate, Disodium Ethylene,Dinitrilotetraacetate, Ethylene,Disodium Versenate, Calcium,EDTA, Chromium,EDTA, Copper,EDTA, Dicobalt,EDTA, Disodium,EDTA, Distannous,EDTA, Gallium,EDTA, Magnesium Disodium,EDTA, Potassium,EDTA, Stannous,Edetate, Calcium Disodium,Ethylene Dinitrilotetraacetate, Disodium,Tetacine, Calcium,Versenate, Calcium Disodium
D013438 Sulfhydryl Compounds Compounds containing the -SH radical. Mercaptan,Mercapto Compounds,Sulfhydryl Compound,Thiol,Thiols,Mercaptans,Compound, Sulfhydryl,Compounds, Mercapto,Compounds, Sulfhydryl
D013667 Technetium The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, and atomic number 43. All technetium isotopes are radioactive. Technetium 99m (m Technetium 99m,99m, Technetium
D015609 Organotechnetium Compounds Organic compounds that contain technetium as an integral part of the molecule. These compounds are often used as radionuclide imaging agents. Compounds, Organotechnetium
D016284 Technetium Tc 99m Pentetate A technetium imaging agent used in renal scintigraphy, computed tomography, lung ventilation imaging, gastrointestinal scintigraphy, and many other procedures which employ radionuclide imaging agents. Tc 99m-DTPA,Tc-DTPA,Technetium-DTPA,Technetium (99m) Pentetate,Technetium Pentetic Acid,Technetium diethylenetriamine pentaacetic acid,99m-DTPA, Tc,Pentetic Acid, Technetium,Tc 99m DTPA,Technetium DTPA
D019783 Technetium Tc 99m Dimercaptosuccinic Acid A nontoxic radiopharmaceutical that is used in the diagnostic imaging of the renal cortex. 99Tc-Succimer,99mTc-DMSA,99mTc-Dimercaptosuccinic Acid,99m-Tc-Dimercaptosuccinic Acid,99mTc-Dimercaptosuccinate,Tc-99m Dimercaptosuccinic Acid,Technetium Tc 99m Succimer,Technetium-99m-DMSA,Technetium-99m-Dimercaptosuccinic Acid,99Tc Succimer,99m Tc Dimercaptosuccinic Acid,99mTc DMSA,99mTc Dimercaptosuccinate,99mTc Dimercaptosuccinic Acid,Acid, 99m-Tc-Dimercaptosuccinic,Acid, 99mTc-Dimercaptosuccinic,Acid, Tc-99m Dimercaptosuccinic,Acid, Technetium-99m-Dimercaptosuccinic,Dimercaptosuccinic Acid, Tc-99m,Tc 99m Dimercaptosuccinic Acid,Technetium 99m DMSA,Technetium 99m Dimercaptosuccinic Acid

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