Evaluation of Deuterium-Labeled JNJ38877605: Pharmacokinetic, Metabolic, and <i>in Vivo</i> Antitumor Profiles
作者:Zhengsheng Zhan、Xia Peng、Yiming Sun、Jing Ai、Wenhu Duan
DOI:10.1021/acs.chemrestox.8b00191
日期:2018.11.19
c-Met inhibitor JNJ38877605 has proven curative as an antitumor agent, while its clinical study was terminated due to renal toxicity. It was reported that the renal toxicity was caused by the poor solubility of its aldehyde oxidase (AO) metabolites. Therefore, blocking AO oxidation of JNJ38877605 might diminish the toxic metabolites and overcome the renal toxicity. Compound 3, the AO metabolic site deuterated JNJ38877605, was then synthesized as the target molecule. In vitro monkey liver S9 fraction incubation of 3 manifested that the renal toxic metabolite M2-2 was significantly reduced, which connoted that this deuteration has partly blocked AO oxidation. After po. nasal gavage to cynomolgus monkeys, compound 3 revealed decreased AO metabolites M2-2 and M3-2 in the plasma as well as 1.88-fold AUC and 1.56-fold Cmax compared with JNJ38877605, indicating that deuterium replacement significantly blocked AO metabolism in vivo. Besides, metabolic profiles of 3 were investigated by analysis of the plasma and the urine of the po. administrated cynomolgus monkeys. Moreover, after oral administration to the EBC-1 tumor-bearing nude mice, compound 3 exhibited a better antitumor efficacy than JNJ38877605. In conclusion, deuteration on the AO metabolic site of JNJ38877605 improved its AO metabolism, oral exposure, as well as in vivo antitumor efficacy.
c-Met 抑制剂 JNJ38877605 作为一种抗肿瘤药物已被证明具有疗效,但其临床研究却因肾毒性而终止。据报道,肾毒性是由于其醛氧化酶(AO)代谢物的溶解性较差造成的。因此,阻断 JNJ38877605 的 AO 氧化可能会减少毒性代谢物,克服肾毒性。随后合成了化合物 3(AO 代谢位点氚化的 JNJ38877605)作为目标分子。在体外猴肝 S9 馏分培养中,3 的肾毒性代谢物 M2-2 明显减少,这意味着该氘代物部分阻断了 AO 氧化。给猴子鼻饲后,化合物 3 在血浆中的 AO 代谢物 M2-2 和 M3-2 均有所减少,AUC 和 Cmax 分别是 JNJ38877605 的 1.88 倍和 1.56 倍,这表明氘交换显著阻断了 AO 在体内的代谢。此外,还通过分析给药后猴子的血浆和尿液研究了 3 的代谢特征。此外,口服给 EBC-1 肿瘤裸鼠服用化合物 3 后,其抗肿瘤效果优于 JNJ38877605。总之,对 JNJ38877605 的 AO 代谢位点进行氘化可改善其 AO 代谢、口服暴露以及体内抗肿瘤疗效。