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孕期双酚A染毒对子代大鼠海马中诱导型一氧化氮合酶表达及活性的影响 被引量:2
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作者 梁嘉显 郭沛森 +3 位作者 经楚煖 徐靖雅 刘娣 于海洋 《环境与职业医学》 CAS CSCD 北大核心 2020年第4期327-333,共7页
[背景]现有研究表明双酚A(BPA)具有一定的神经毒性。一氧化氮(NO)是神经系统的重要逆行信使,其含量改变在神经毒性机制中发挥一定作用。当外源性化学物作用于机体时,诱导型一氧化氮合酶(iNOS)表达与活性变化对于NO的生成具有一定影响。... [背景]现有研究表明双酚A(BPA)具有一定的神经毒性。一氧化氮(NO)是神经系统的重要逆行信使,其含量改变在神经毒性机制中发挥一定作用。当外源性化学物作用于机体时,诱导型一氧化氮合酶(iNOS)表达与活性变化对于NO的生成具有一定影响。[目的]探讨孕期BPA染毒对各发育阶段子代大鼠海马中iNOS表达及活性的影响。[方法]将60只SPF级健康SD孕鼠随机分为对照组和0.05、0.5、5、50 mg·kg^-1·d^-1的BPA染毒组,每组12只。于妊娠期第5天(GD5)-GD19以灌胃的方式进行染毒,以玉米油为溶剂配制相应浓度的BPA试剂,对照组母鼠灌胃玉米油。于GD20每组各处死6只孕鼠,剥离胎盘,取胎鼠脑组织,分离海马;剩余6只孕鼠继续饲养,仔鼠于出生后第21天(PND21)断乳,分别于PND21和PND56时,每组取6只仔鼠,经乙醚麻醉后处死,取仔鼠的海马组织。计算GD20、PND21、PND56这3个发育阶段仔鼠脑组织脏器系数,采用试剂盒检测海马组织中的NO含量、iNOS活性,采用实时定量PCR法测定各组iNOSmRNA水平,通过Western blotting检测iNOS的蛋白表达。[结果]NO检测结果显示,GD20各BPA染毒组仔鼠海马组织中NO含量均低于对照组(均P <0.05);而PND21和PND56的各BPA染毒组仔鼠(除PND21的0.05 mg·kg^-1组外)海马组织中NO含量均高于对照组,但PND56的0.5、5、50 mg·kg^-1BPA组仔鼠海马中NO含量低于0.05 mg·kg^-1组(均P <0.05)。iNOS mRNA表达结果显示,各发育阶段的BPA组仔鼠海马中iNOS mRNA含量均高于对照组(均P <0.05);其中GD20的50 mg·kg^-1 BPA组仔鼠海马中iNOS mRNA含量低于0.5 mg·kg^-1组(P <0.05);PND21的0.5、5、50 mg·kg^-1 BPA组仔鼠海马中iNOS mRNA含量均低于0.05 mg·kg^-1 BPA组,5、50 mg·kg^-1组仔鼠海马中iNOS mRNA含量也低于0.5 mg·kg^-1 BPA组(均P <0.05);PND56的5 mg·kg^-1 BPA组仔鼠海马中iNOS mRNA含量高于0.05、0.5 mg·kg^-1组,而50 mg·kg^-1组的iNOS mRNA含量低于5 mg·kg^-1组(均P <0.05)。iNOS蛋白表达结果显示,各发育阶段的0.5、5、50 mg·kg^-1 BPA组仔鼠海马中iNOS蛋白相对表达量均高于对照组和0.05 mg·kg^-1 BPA组(均P <0.05),其中GD20的50 mg·kg^-1 BPA组仔鼠海马中的iNOS蛋白相对表达量也高于5 mg·kg^-1组(P <0.05);各发育阶段对照组和0.05 mg·kg^-1BPA组iNOS的蛋白相对表达量相比较,差异无统计学意义(均P> 0.05)。而iNOS活性的检测结果显示,GD20的50 mg·kg^-1 BPA组仔鼠海马中iNOS活性高于对照组及其他各剂量BPA组(均P <0.05);而各BPA染毒组的PND21和PND56仔鼠海马中iNOS活性均高于各自对照组,其中PND21的0.5 mg·kg^-1 BPA组仔鼠海马中iNOS活性也高于0.05 mg·kg^-1组(均P <0.05)。[结论]孕期BPA染毒可促进不同发育阶段仔鼠海马组织中iNOS的基因及蛋白表达,增加iNOS酶活性,该过程在孕期BPA染毒所致仔鼠出生后NO含量升高以及由于NO含量升高所可能导致的神经毒性损伤中发挥一定作用。 展开更多
关键词 双酚A 孕期染毒 海马 一氧化氮 诱导型一氧化氮合酶
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Management of chronic hepatitis B in pregnancy 被引量:16
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作者 Guo-Rong Han Chuan-Lu Xu +1 位作者 Wei Zhao Yong-Feng Yang 《World Journal of Gastroenterology》 SCIE CAS CSCD 2012年第33期4517-4521,共5页
Pregnancy associated with chronic hepatitis B (CHB) is a common and important problem with unique challenges. Pregnant women infected with CHB are different from the general population, and their special problems need... Pregnancy associated with chronic hepatitis B (CHB) is a common and important problem with unique challenges. Pregnant women infected with CHB are different from the general population, and their special problems need to be considered: such as the effect of hepatitis B virus (HBV) infection on the mother and fetus, the effect of pregnancy on replication of the HBV, whether mothers should take HBV antiviral therapy during pregnancy, the effect of these treatments on the mother and fetus, how to carry out immunization of neonates, whether it can induce hepatitis activity after delivery and other serious issues. At present, there are about 350 million individuals with HBV infection worldwide, of which 50% were infected during the perinatal or neonatal period, especially in HBV-endemic countries. Currently, the rate of HBV infection in thechild-bearing age group is still at a high level, and the infection rate is as high as 8.16%. Effective prevention of mother-to-child transmission is an important means of reducing the global burden of chronic HBV infection. Even after adopting the combined immunization measures, there are still 5%-10% of babies born with HBV infection in hepatitis B e antigen positive pregnant women. As HBV perinatal transmission is the main cause of chronic HBV infection, we must consider how to prevent this transmission to reduce the burden of HBV infection. In this population of chronic HBV infected women of childbearing age, specific detection, intervention and follow-up measures are particularly worthy of attention and discussion. 展开更多
关键词 Chronic hepatitis B Hepatitis B virus Mother-to-child transmission Perinatal transmission Pregnancy Vertical transmission Antiviral therapy
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