Estudo do perfil cinético e alométrico do protótipo de fármaco antineoplásico LQFM018 em modelos experimentais por LC-MS/MS
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2015-03-31
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Universidade Federal de Goiás
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LQFM018 is a prototype drug with proven anticancer activity in vitro (cytotoxicity against K-562 cell line, IC50 = 0.07652 mM), which was obtained by molecular simplification from antitumor compounds called nutlins, inhibitors of the interaction MDM2-p53. This study aimed to determine its pharmacokinetic profile, using, to this end, validated bioanalytical method in LC-MS/MS. The parameters used in analytical LC-MS/MS were: ACE® C18 column (100 mm × 4.6 mm, 5 μm), mobile phase buffer 2 mM ammonium acetate with 0.025% formic acid and methanol (50%:50% v/v), flow 1.2 mL/min, temperature of the column 40 °C, internal standard (IS) domperidone, liquid-liquid extraction with methyl tert-butyl ether (MTBE) and injection volume of 3.0 μL. The method was linear from 10 to 15,000 ng/mL (r = 0.9997). Intrarun precision was ranged from 0.6% to 5.5% and interrun from 1.8% to 6.7%. The accuracy found was 99.0% to 107.0% and the average recovery of controls was 74.1% ± 4.9%. The retention times were 3.16 min for LQFM018 and 1.81 min to domperidone. LQFM018 was administered to 3 females Wistar rats at 100 mg/kg, i.p. After administration, 0.5 mL samples of blood were collected by cannulation of the left jugular vein with heparinized syringe, at 1h, 2 h, 3 h, 4 h, 5 h, 6 h, 7 h, 8 h and 9 h. Blood samples were identified and centrifuged to obtain plasma which was frozen at -20 °C until the time of analysis. The pharmacokinetic parameters (mean ± SD) were t½ = 2.89 ± 2.0 h; ClT/F = 22.01 ± 13.5 mL/min/kg; Vd/F = 5.48 ± 3.6 L/kg. The values of Vd/F, t½ and CLT/F extrapolated using allometric scaling for a person weighing 70 kg were 1954.3 L/kg, 12.6 h and 1800.4 mL/min/kg, respectively. The bioanalytical method was suitable for the detection and quantification of LQFM018 from plasma rat. The kinetic profile, extrapolated on allometric scaling, revealed a high value of t½, high Vd and long value of CLT, allowing understand that the studied prototype showed good tissue distribution profile and was extensively eliminated.
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RODRIGUES, A. R. Estudo do perfil cinético e alométrico do protótipo de fármaco antineoplásico LQFM018 em modelos experimentais por LC-MS/MS. 2015. 107 f. Dissertação (Mestrado em Ciências Farmacêuticas) - Universidade Federal de Goiás, Goiânia, 2015.