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Pre-clinical evaluation of pharmacokinetic profile of antitumoral LQFM030 prototype in rats by LC-MS/MS

By Iury Valentim Jorge Zoghaib

Abstract

O LQFM030 foi obtido por simplificação molecular dos nutlins (inibidores da interação MDM2-p53) e, tendo demonstrado excelente atividade antineoplásica in vitro (citotoxicidade contra a linhagem celular K-562 com IC50 = 23 M) e in vivo contra tumor ascítico de Ehrlich, com aumento de sobrevida em animais tratados, desenvolveu-se o estudo do perfil farmacocinético, p.o., em ratos. Empregou-se método analítico em LC-MS/MS (Applied Biosystems MDS Sciex API 3200) previamente validado em colaboração. O LQFM030 foi administrado a 3 ratos (peso médio de 186g), em dose preestabelecida de 100 mg/kg, por gavagem. Após a administração, foram coletadas amostras de 1,0 mL de sangue, por canulação da veia jugular esquerda, com seringa heparinizada, nos intervalos de tempo de 0 a 8 h. As amostras sanguíneas foram identificadas e centrifugadas para obtenção do plasma, que foi congelado a -20ºC até o momento da análise. Os parâmetros cinéticos foram calculados no software Winnonlin 5.0 (Pharsight™). Resultados (média ± DP): meia-vida (t1/2) 3,61 ± 0,68 h; clearance total (CLT) 36,49 ± 2,23 mL/min/kg; volume de distribuição (Vd) 11,40 ± 1,58 L/kg. O LQFM030 apresentou baixo valor de t1/2, elevado Vd e elevado valor de CLT. Estes valores permitem entender que o protótipo estudado demonstrou um bom perfil de distribuição tecidual e/ou foi extensivamente eliminado. Quando comparados com parâmetros cinéticos obtidos em outros estudos, observou-se diferença nos resultados, justificada pela elevada variabilidade interespécies, principalmente na taxa de metabolismo basal e peso corporal, uma vez que as vias de administração, oral e intraperitoneal, são cineticamente semelhantes.The LQFM030 was obtained by molecular simplification of nutlins (inhibitors of p53-MDM2 interaction) and, having demonstrated excellent antineoplastic activity in vitro (cytotoxicity against K-562 cell line with IC50 = 23 M) and in vivo against Ehrlich ascitic tumor with increased survival in treated animals developed the pharmacokinetic study of p.o. in rats. It was used for LC-MS/MS analytical method (Applied Biosystems MDS Sciex API 3200) previously validated together. O LQFM030 was administered to 3 rats (mean weight 186g) in predetermined dose of 100 mg/kg by gavage. After administration, samples were collected from 1.0 mL of blood by cannulation of the left jugular vein with heparinized syringe, the intervals 0-8 h. The blood samples were identified and centrifuged to obtain plasma which was frozen at -20°C until analysis. The kinetic parameters were calculated in the software WinNonlin 5.0 (Pharsight™). Results (mean ± SD) half-life (t1/2) 3.61 ± 0.68 h, total clearance (CLT) 36.49 ± 2.23 mL/min/kg, volume of distribution (Vd) 11,40 ± 1.58 L/kg. The LQFM030 had low value of t1/2, Vd high and high value of CLT. These values allow us to understand that the prototype study demonstrated a good safety profile of tissue distribution and/or has been extensively eliminated. When compared with the kinetic parameters obtained in other studies, it was observed difference in results is justified by the high interspecies variability, mainly in basal metabolic rate and body weight, once the route of administration, orally and intraperitoneally, are kinetically similar

Topics: LQFM030, LC-MS/MS, Farmacocinética pré-clínica, LQFM030, LC-MS/MS, Preclinical pharmacokinetics, FARMACIA::FARMACOTECNIA
Publisher: Universidade Federal de Goiás
Year: 2015
OAI identifier: oai:agregador.ibict.br.RI_UFG:oai:repositorio.bc.ufg.br:ri/9811
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