近日,河北醫(yī)科大學(xué)藥學(xué)院石曉偉課題組遲玉乾老師,使用IPHASE品牌產(chǎn)品:大鼠肝微粒體在《International Journal of Biological Macromolecules》權(quán)·威期刊上發(fā)表文章《Metabolic activation and cytochrome P450 inhibition of piperlonguminine mediated by CYP3A4》,影響因子8.2!
本研究的主要目的是在體外鑒定PLG的反應(yīng)性代謝物,并評估其抑制CYP450的能力。在暴露于PLG的大鼠和人肝微粒體孵育系統(tǒng)中,檢測到兩種氧化代謝物(M1和M2)。此外,在以n-乙酰半胱氨酸作為捕獲劑的微粒體中,發(fā)現(xiàn)了四種異構(gòu)體o-醌衍生的反應(yīng)性代謝物的n-乙酰半胱氨酸偶聯(lián)物(M3、M4、M5和M6)。代謝物的形成依賴于NADPH。抑制和重組CYP450酶孵育實驗表明,CYP3A4是負責(zé)PLG代謝激活的主要酶。本研究通過化學(xué)合成的方法對O-脫烷基化代謝物(M1)進行了表征。半抑制濃度移位實驗顯示,PLG對CYP3A4、2C9、2E1、2C8和2D6的抑制作用呈時間依賴性。本研究有助于理解PLG誘導(dǎo)的酶抑制和生物活化。
摘要
Piperlonguminine (PLG) is a major alkaloid found in Piper longum fruits. It has been shown to possess a variety of biological activities, including anti-tumor, anti-hyperlipidemic, anti-renal fibrosis and anti-inflammatory properties.Previous studies have reported that PLG inhibits various CYP450 enzymes. The main objective of this study was to identify reactive metabolites of PLG in vitro and assess its ability to inhibit CYP450. In rat and human liver microsomal incubation systems exposed to PLG, two oxidized metabolites (M1 and M2) were detected. Additionally, in microsomes where N-acetylcysteine was used as a trapping agent, N-acetylcysteine conjugates (M3, M4, M5 and M6) of four isomeric O-quinone-derived reactive metabolites were found. The formation of metabolites was dependent on NADPH. Inhibition and recombinant CYP450 enzyme incubation experiments showed that CYP3A4 was the primary enzyme responsible for the metabolic activation of PLG. This study characterized the O-dealkylated metabolite (M1) through chemical synthesis.The IC50 shift assay showed timedependent inhibition of CYP3A4, 2C9, 2E1, 2C8 and 2D6 by PLG. This research contributes to the understanding of PLG-induced enzyme inhibition and bioactivation.
完整版文獻可在【IPHASE】公眾號后臺留言【獲取文章】
再次恭喜文獻發(fā)表,以及對我司產(chǎn)品的認可,希望以上文獻能幫助大家了解目前研究進展及我們的核心技術(shù),歡迎各位新老客戶聯(lián)系我們咨詢、提出意見,愿我們的努力成果與您的科研碰撞出不一樣的火花!
發(fā) 文 章 得 獎 勵
凡使用本公司產(chǎn)品,在國內(nèi)及國際刊物上發(fā)表論文(論文發(fā)表日起一年內(nèi)),并注明產(chǎn)品屬于IPHASE BIOSCIENCES Co.,Ltd. / 匯智和源生物技術(shù)(蘇州)有限公司所有,即可申請獎勵。根據(jù)發(fā)表刊物影響因子不同,給予不同金額獎品:
非SCI論文及IF≤5分,500元禮品;
5分
8分
IF≥10分 2000元;
注:禮品卡也可兌換同等金額產(chǎn)品購買抵用券;
活動多多,禮品豐厚,快來參與吧!
關(guān) 于 我 們
匯智和源,致力于為創(chuàng)新藥研發(fā)企業(yè)及生命科學(xué)研究機構(gòu)提供高品質(zhì)的生物試劑,IPHASE為公司核心品牌,品牌宗旨“Innovative Reagents For Innovative Research”。