This work demonstrated that TPGS based nanomicelles are susceptible to be radiolabeled with Tc thus they can be used to perform imaging studies in animal models. Moreover radiolabeling of these delivery nano systems reveals their possibility to be used as diagnostic agents in the near future.
Recibido el 6 de diciembre de 2014; aceptado el 7 de febrero de 2015 Disponible en Internet el 1 de abril de 2015
PALABRAS CLAVEMedios de contraste; Interacción farmacocinética; Renograma; Imágenes en pequeños animales;
Medicina nuclearResumen El estudio reporta la modificación de los estudios dinámicos renales con radioisó-topos (EDRR) en animales control después de la administración de medios de contraste iodado (MCI). Se realizó EDRR con 99m Tc-DTPA (37MBq) en ratas (n = 9, Sprague Dawley) adquiriendo un cuadro/s durante el primer minuto y luego un cuadro/15 s, completando los 30 min. Una semana después se repitió el EDRR una hora después de la administración intravenosa de MCI. Los resultados mostraron que las curvas basales se encontraban dentro de los patrones normales esperados, TMAX 3,1 ± 1,8 min, T50%Mx 7,25 ± 1,90 min y valores de función renal relativa (FRR) normales, 50,0 ± 4,3%. Las curvas post-MCI mostraron cambios cualicuantitativos como prolongación del TMAX hasta 12 min, la fase de eliminación compatible con un patrón obstructivo y la FRR se mantuvo dentro del rango normal. En conclusión, el MCI interfirió con la función renal normal como se demuestra en el EDRR.
Quali-quantitative modification of the radionuclide basic renogram after the administration of iodine contrast mediaAbstract The study presents a modification of the radionuclide basic renogram (RBR) in control animals after the administration of iodine contrast media (ICM). Sprague-Dawley rats (n = 9) were used to perform RBR with 99mTc-DTPA (37 MBq) under control conditions. Dynamic studies were acquired taking 1 frame/1 second during the first minute, and then one frame/15 s up to 30 min. After one week, we repeated the RBR but this time it was performed one hour after the intravenous administration of ICM. The results showed that RBR under control conditions * Autor para correspondencia. Correo electrónico: marianogportillo@gmail.com (M.G. Portillo).
Imagenological parameters showed differences among treated and control groups and between both chemotherapy treatments. Thus, these radiopharmaceutical functional approaches were able to reflect heart and liver toxicity produced by doxorubicin.
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