在大鼠中,扎米斯塔特的新陈代谢和处置
Francisca Araújo1, Maria Luisa Dória1, Alexandre Beliaev1
1Department of Research and Development, BIAL - Portela & Ca. S.A., São Mamede do Coronado, Portugal.
Xenobiotica; the fate of foreign compounds in biological systems
|October 3, 2024
概括
扎米卡斯塔特是一种用于肺动脉高血压的多巴胺β-基酶抑制剂,在老鼠中迅速吸收并主要通过便排出. 代谢发生在8小时内,并确定了一条通往异酸的独特途径.
科学领域:
- 药理学 药理学是指药理学的学科.
- 药物代谢和药理动力学
- 毒理学 毒理学 毒理学
背景情况:
- 肺动脉高血压 (PAH) 需要新的治疗药物.
- 扎米卡斯塔特是一种可逆多巴胺β-氧化酶 (DβH) 抑制剂,用于PAH治疗.
- 了解药物代谢和处置对于治疗开发至关重要.
研究的目的:
- 在大鼠中研究扎米卡斯塔特的新陈代谢和处置.
- 为了描述 [14C]-zamicastat 的吸收,分布,分泌和代谢途径.
- 为了确定Zamicastat的潜在代谢物.
主要方法:
- 对老鼠进行口服和静脉注射的 [14C]-zamicastat.
- 在168小时内,血,组织,尿液,便和呼出的空气中总放射性的量化.
- 对血样本的分析,以确定不变的扎米卡斯塔特及其代谢物的度.
- 使用分析技术识别代谢物.
主要成果:
- 扎米斯塔特被迅速吸收并广泛分布,168小时后放射性几乎完全恢复.
- 排泄的主要途径是通过便;尿液和呼出的空气起到了轻微的作用.
- 与扎米斯塔特相关的放射性物质的血度较早达到峰值,并且可以在144小时内保持可量化的水平.
- 没有变化的扎米斯塔特在2小时达到峰值,并在24小时内显著下降.
- 代谢主要发生在前8小时内,在96小时后发现了一种代谢物 (异酸/酸).
- 代谢途径包括脱硫,N-脱化,氧化,N-乙化,以及一条通往异酸/硫酸的新途径.
结论:
- 扎米卡斯塔特在老鼠中表现出有利的药理动力学特性,吸收速度快,便分泌占主.
- 药物经历广泛的新陈代谢,主要是在服用后的最初8小时内.
- 鉴定出一种独特的代谢途径导致异酸/硫酸,需要进一步调查.
- 这些发现为进一步开发扎米卡斯塔特作为潜在的PAH治疗方法提供了必要的数据.
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