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| Borborema,Samanta Etel Treiger; Andrade Junior,Heitor Franco de; Osso Junior,João Alberto; Nascimento,Nanci do. |
| Pentavalent antimony, as meglumine antimoniate (Glucantime® ) or sodium stibogluconate (Pentostam® ), is the main treatment for leishmaniasis, a complex of diseases caused by the protozoan Leishmania, and an endemic and neglected threat in Brazil. Despite over half a century of clinical use, their mechanism of action, toxicity and pharmacokinetic data remain unknown. The analytical methods for determination of antimony in biological systems remain complex and have low sensitivity. Radiotracer studies have a potential in pharmaceutical development. The aim of this study was to obtain a radiotracer for antimony, with suitable physical and biological properties. Meglumine antimoniate was neutron irradiated inside the IEA-R1 nuclear reactor, producing two... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Meglumine antimoniate; Leishmaniasis; Leishmania (L.) chagasi; Radiotracer. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000700009 |
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| Arribada,Raquel Gregorio; Pereira,Nara Caroline; Cardoso,Valbert Nascimento; Cunha Júnior,Armando da Silva; Barros,André Luís Branco de. |
| Radiolabeling cidofovir with technetium-99m (99mTc-CDV) is an innovative procedure that enables real-time monitoring of the drug. Essays were performed in vitro, showing high radiolabel stability within 24 h. Blood clearance, biodistribution studies, and scintigraphic images were performed in healthy mice in order to evaluate the profile of the drug in vivo. 99mTc-CDV showed biphasic blood circulation time and significant kidney uptake, indicating that 99mTc-CDV is preferentially eliminated by the renal route. Bones also showed important uptake throughout the experiment. In summary, cidofovir was successfully labeled with technetium-99m and might be used in further studies to track the drug. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cidofovir; Radiotracer; Technetium-99m; Biodistribution; Scintigraphic imaging. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100570 |
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| Yonamine,C. M.; Costa,H.; Silva,J. A. A.; Muramoto,E.; Rogero,J. R.; Troncone,L. R. P.; Camillo,M. A. P.. |
| The use of radiotracers allows the understanding of the bioavailability process, biodistribution, and kinetics of any molecule labelled with an isotope, which does not alter the molecule's biological properties. In this work, technetium-99m and iodine-125 were chosen as radiotracers for biodistribution studies in mice using bee (Apis mellifera) venom and a toxin (PnTX2-6) from the Brazilian "armed" spider (Phoneutria nigriventer) venom. Incorporated radioactivity was measured in the blood, brain, heart, lung, liver, kidney, adrenal gland, spleen, stomach, testicle, intestine, muscle, and thyroid gland. Results provided the blood kinetic parameter, and different organs distribution rates. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phoneutria nigriventer; Apis mellifera; Toxin; Venom; Radiotracer; Biodistribution. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992005000100006 |
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