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Microgram-order ammonium perfluorooctanoate may activate mouse peroxisome proliferator-activated receptor alpha, but not human PPARalpha.
Toxicology ( IF 4.5 ) Pub Date : 2009-09-12 , DOI: 10.1016/j.tox.2009.09.004
Toshiki Nakamura 1 , Yuki Ito , Yukie Yanagiba , Doni Hikmat Ramdhan , Yasuhide Kono , Hisao Naito , Yumi Hayashi , Yufei Li , Toshifumi Aoyama , Frank J Gonzalez , Tamie Nakajima
Affiliation  

Perfluorooctanoic acid (PFOA) is a ligand for peroxisome proliferator-activated receptor (PPAR) alpha, which exhibits marked species differences in expression and function, especially between rodents and humans. We investigated the functional difference in PFOA response between mice and humans, using a humanized PPARalpha transgenic mouse line. Three genotyped mice, 129/Sv wild-type (mPPARalpha), Pparalpha-null mice and humanized PPARalpha (hPPARalpha) mice (8-week-old males) were divided into three groups: the first was treated with water daily for 2 weeks by gavage (control group), and the remaining two groups were treated with 0.1 and 0.3mg/kg ammonium perflurooctanate (APFO), respectively, for 2 weeks by gavage. The APFO dosages used did not influence the plasma triglyceride or total cholesterol levels in any mouse line, but the high dose increased both hepatic lipid levels only in mPPARalpha mice. APFO increased mRNA and/or protein levels of PPARalpha target genes cytochrome P450 Cyp4a10, peroxisomal thiolase and bifunctional protein only in the liver of mPPARalpha mice, but not in Pparalpha-null or hPPARalpha mice. This chemical also increased expression of mitochondrial very long chain acyl-CoA dehydrogenase only in the liver of mPPARalpha mice. Taken together, human PPARalpha may be less responsive to PFOA than that of mice when a relatively low dose is applied. This information may be very valuable in considering whether PFOA influences the lipid metabolism in humans.

中文翻译:

微克级全氟辛酸铵可激活小鼠过氧化物酶体增殖物激活受体 α,但不能激活人 PPARα。

全氟辛酸 (PFOA) 是过氧化物酶体增殖物激活受体 (PPAR) α 的配体,在表达和功能方面表现出明显的物种差异,尤其是啮齿动物和人类之间。我们使用人性化的 PPARalpha 转基因小鼠系调查了小鼠和人类之间 PFOA 反应的功能差异。三只基因型小鼠,129/Sv 野生型 (mPPARalpha)、Pparalpha-null 小鼠和人源化 PPARalpha (hPPARalpha) 小鼠(8 周大的雄性)被分成三组:第一组每天用水治疗 2 周灌胃(对照组),其余两组分别用0.1和0.3mg/kg全氟辛酸铵(APFO)灌胃2周。使用的 APFO 剂量不影响任何小鼠品系的血浆甘油三酯或总胆固醇水平,但高剂量仅在 mPPARalpha 小鼠中增加了肝脏脂质水平。APFO 仅在 mPPARalpha 小鼠的肝脏中增加 PPARalpha 靶基因细胞色素 P450 Cyp4a10、过氧化物酶体硫解酶和双功能蛋白的 mRNA 和/或蛋白质水平,但在 Pparalpha null 或 hPPARalpha 小鼠中不增加。这种化学物质还仅在 mPPARalpha 小鼠的肝脏中增加了线粒体极长链酰基辅酶 A 脱氢酶的表达。总之,当应用相对低的剂量时,人类 PPARalpha 对全氟辛酸的反应可能不如小鼠。在考虑全氟辛酸是否影响人类的脂质代谢时,该信息可能非常有价值。过氧化物酶体硫解酶和双功能蛋白仅在 mPPARalpha 小鼠的肝脏中存在,但在 Pparalpha-null 或 hPPARalpha 小鼠中不存在。这种化学物质还仅在 mPPARalpha 小鼠的肝脏中增加了线粒体极长链酰基辅酶 A 脱氢酶的表达。总之,当应用相对低的剂量时,人类 PPARalpha 对全氟辛酸的反应可能不如小鼠。在考虑全氟辛酸是否影响人类的脂质代谢时,该信息可能非常有价值。过氧化物酶体硫解酶和双功能蛋白仅在 mPPARalpha 小鼠的肝脏中存在,但在 Pparalpha-null 或 hPPARalpha 小鼠中不存在。这种化学物质还仅在 mPPARalpha 小鼠的肝脏中增加了线粒体极长链酰基辅酶 A 脱氢酶的表达。总之,当应用相对低的剂量时,人类 PPARalpha 对全氟辛酸的反应可能不如小鼠。在考虑全氟辛酸是否影响人类的脂质代谢时,该信息可能非常有价值。
更新日期:2019-11-01
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