Distribution, Metabolism, and Excretion of Cenobamate in Adult, Fetal, Neonatal, and Lactating Rats.

IF 1.9 4区 医学 Q3 PHARMACOLOGY & PHARMACY
Jairam Palamanda, Kelli J Glenn, Susan M Melnick
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引用次数: 0

Abstract

Background and objective: Cenobamate is an antiseizure medication (ASM) approved for treatment of focal epilepsy in adults. The objective of this study was to characterize the distribution, metabolism, and excretion of cenobamate in adult and pre- and postnatal rats, including pregnant and lactating females and nursing pups.

Methods: Distribution, metabolic, and excretion profiles were determined for 14C-labeled and unlabeled cenobamate using liquid scintillation counting, radiochromatography, LCMS, and LCMS/MS after oral or intravenous (IV) administration.

Results: Distribution of 14C-cenobamate-related material in adult male rats was widespread throughout the body, with nearly 1:1 tissue-to-plasma ratios observed for most tissues, including brain. Cenobamate administered to pregnant females was also transferred across the placental barrier into amniotic fluid and fetal plasma. Following administration to lactating F0 females, cenobamate was detected in breast milk and in plasma of nursing pups. 14C-cenobamate administered to adult male rats as a single oral dose was extensively metabolized with nine metabolites identified in urine and feces, including a principal dihydrodiol metabolite. Cenobamate was the principal drug-related material in rat plasma. Following a single dose of 14C-cenobamate to male and female rats, radioactivity was excreted equally into urine and feces, with mass balance achieved by 48 h postdose.

Conclusions: Distribution of cenobamate was widespread into many rat tissues, including brain, amniotic fluid, fetal plasma, breast milk, and breastfeeding rat pups. These distribution findings, along with the results of the metabolism and excretion studies, may help inform treatment decisions for patients with epilepsy being treated with cenobamate, including pregnant or nursing mothers.

Abstract Image

Cenobamate在成年、胎儿、新生儿和哺乳期大鼠中的分布、代谢和排泄。
背景和目的:Cenobamate是一种被批准用于治疗成人局灶性癫痫的抗癫痫药物。本研究的目的是描述cenobamate在成年大鼠、产前和产后大鼠(包括怀孕和哺乳期雌性大鼠以及哺乳期幼崽)中的分布、代谢和排泄。方法:在口服或静脉(IV)给药后,使用液体闪烁计数、放射色谱法、LCMS和LCMS/MS测定14C标记和未标记的新诺巴特的分布、代谢和排泄谱。结果:在成年雄性大鼠中,14C苯乙醇胺相关物质在全身广泛分布,包括大脑在内的大多数组织的组织与血浆比例接近1:1。孕妇服用的Cenobamate也通过胎盘屏障转移到羊水和胎儿血浆中。对哺乳期F0雌性进行给药后,在哺乳幼崽的母乳和血浆中检测到苯诺巴特。成年雄性大鼠单次口服14C cenobamate后,尿液和粪便中发现了9种代谢产物,其中包括一种主要的二氢二醇代谢产物。Cenobamate是大鼠血浆中主要的药物相关物质。在雄性和雌性大鼠单次服用14C cenobamate后,放射性物质平均排泄到尿液和粪便中,并在给药后48小时达到质量平衡。结论:cenobamate广泛分布在许多大鼠组织中,包括大脑、羊水、胎儿血浆、母乳和哺乳期大鼠幼崽。这些分布发现,加上代谢和排泄研究的结果,可能有助于为正在接受苯诺贝特治疗的癫痫患者(包括孕妇或哺乳期母亲)的治疗决策提供信息。
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来源期刊
CiteScore
3.70
自引率
0.00%
发文量
64
审稿时长
>12 weeks
期刊介绍: Hepatology International is a peer-reviewed journal featuring articles written by clinicians, clinical researchers and basic scientists is dedicated to research and patient care issues in hepatology. This journal focuses mainly on new and emerging diagnostic and treatment options, protocols and molecular and cellular basis of disease pathogenesis, new technologies, in liver and biliary sciences. Hepatology International publishes original research articles related to clinical care and basic research; review articles; consensus guidelines for diagnosis and treatment; invited editorials, and controversies in contemporary issues. The journal does not publish case reports.
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