Genetic influence on dysmorphogenesis in embryos from different rat strains exposed to ethanol in vivo and in vitro.

Genetic influence on dysmorphogenesis in embryos from different rat strains exposed to ethanol in vivo and in vitro.
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遗传对体内和体外暴露于乙醇的不同大鼠品系的胚胎畸形发生的影响。

DOI:
10.1111/j.1530-0277.2008.00647.x
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发表时间:
2008
期刊:
Alcoholism, clinical and experimental research
影响因子:
--
通讯作者:
U. Eriksson
U. Eriksson
中科院分区:
--
文献类型:
--
作者:
P. Wentzel;U. Eriksson

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背景 目的是调查胚胎的敏感性,从2个品系(U和H)的早期妊娠,在体内和体外乙醇暴露48小时。 方法 在妊娠第9至11天研究胚胎。我们在体内使用了1个乙醇剂量(6 g/kg x 2),在体外使用了3个不同的乙醇浓度(88 mM、132 mM、176 mM),并试图通过向培养基中加入抗氧化剂N-乙酰半胱氨酸(NAC,0.5 mM)来减少体外致畸作用。 结果 无论是在体内还是体外,乙醇对U胚胎的损伤都大于H胚胎。NAC的加入减少了胚胎发育不良,但未能完全正常化。乙醇增加Bax/Bcl-2的比例在U胚胎在体内和体外,但不是在H胚胎。此外,乙醇引起U胚胎中Caspase-3免疫染色增加,但在H胚胎中没有。乙醇暴露在体内并没有改变CuZnSOD和MnSOD的mRNA水平在U和H胚胎。然而,在体外,乙醇暴露的U胚胎增加其CuZnSOD和MnSOD的mRNA水平,而CuZnSOD的mRNA不变,MnSOD的mRNA下降的H胚胎,在这两个菌株NAC没有发挥任何作用。U胚胎增加过氧化氢酶基因的表达响应乙醇在体内,但过氧化氢酶mRNA水平在体外,NAC的正常化的变化。H胚胎没有改变体内过氧化氢酶mRNA水平,但增加了体外基因表达,没有NAC的影响。乙醇影响其他ROS清除酶的基因表达和研究的发育基因- Bmp-4,Ret,Shh,Pax-6 -在2个菌株中相似。 结论 研究结果支持遗传易感性,氧化应激和细胞凋亡在乙醇致畸性中的作用,并表明更敏感的U大鼠的致畸易感性可能存在,至少部分地,在调节的ROS清除酶在U胚胎。
BACKGROUND The aim was to investigate the susceptibility of embryos from 2 rat strains (U and H) to a 48 hours ethanol exposure in early pregnancy, both in vivo and in vitro. METHODS The embryos were studied on gestational days 9 to 11. We used 1 ethanol dose in vivo (6 g/kg x 2), 3 different ethanol concentrations in vitro (88 mM, 132 mM, 176 mM) and also attempted to diminish the teratogenic effect in vitro by supplying the antioxidant N-acetylcysteine (NAC, 0.5 mM) to the culture medium. RESULTS The U embryos were more damaged by ethanol than the H embryos, both in vivo and in vitro. NAC addition diminished, but failed to completely normalize, the embryonic maldevelopment. Ethanol increased the Bax/Bcl-2 ratio in the U embryos both in vivo and in vitro, but not in the H embryos. Furthermore, ethanol caused increased Caspase-3 immunostaining in U embryos, but not in H embryos. Ethanol exposure in vivo did not alter CuZnSOD and MnSOD mRNA levels in U and H embryos. In vitro, however, the ethanol-exposed U embryos increased their CuZnSOD and MnSOD mRNA levels, whereas the CuZnSOD mRNA was unchanged and MnSOD mRNA decreased in the H embryos, in neither strain did NAC exert any effect. The U embryos increased catalase gene expression in response to ethanol in vivo, but decreased catalase mRNA levels in vitro, changes normalized by NAC. The H embryos did not alter catalase mRNA levels in vivo, but increased gene expression in vitro, with no NAC effect. Ethanol affected the gene expression of the other ROS scavenging enzymes and the developmental genes studied - Bmp-4, Ret, Shh, Pax-6 - similarly in the 2 strains. CONCLUSIONS The findings support a role for genetic predisposition, oxidative stress, and apoptosis in ethanol teratogenicity, and suggest that the teratogenic predisposition of the more susceptible U rats may reside, at least in part, in the regulation of the ROS scavenging enzymes in the U embryos.
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DOI: 10.1016/0378-4274(94)03225-v
发表时间: 1995
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影响因子: 3.5
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