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1.
目的:观察去势与非去势雌性大鼠成骨细胞内雌激素受体β的表达水平,并比较其变化特点。方法:实验于2003—02/06在哈尔滨医科大学第二临床医学院科研中心完成。分别取新生,2,4,6,8,10,12个月龄的雌性Wistar大鼠各14只,按月龄分为6组,2,4,6,8,10,12个月龄组,各月龄组再随机分对照组,正常饲养不造模;去势组行卵巢切除造模,每组各7只。两个月后处死。①成骨细胞的生物学特征检测:取新生雌性Wistar大鼠14只用于大鼠成骨细胞体外培养。采用二次酶消化法、反复贴壁法分离纯化培养大鼠成骨细胞。采用倒置显微镜观察成骨细胞形态及超微结构。大鼠成骨细胞检验学特征碱性磷酸酶检测采用改良钙钴法,阳性反应为胞质中出现灰黑至深黑颗粒状或片状沉淀。成骨细胞培养上清液碱性磷酸酶及骨钙素检测,采用磷酸对硝基苯酯二钠盐比色法进行碱性磷酸酶检测,测得A值,换算成国际单位。采用放射免疫试剂盒进行骨钙素检测,计数器测定沉淀物cpm值,根据标准曲线得到样品中骨钙素含量。②成骨细胞内雌激素受体检测:应用半定量蛋白印迹酶促底物染色法以及发光法。测得A值,以A值越高,说明雌激素受体β表达越多。结果:纳入84只大鼠分为6组,均进入结果分析。①成骨细胞形态学观察:随着培养时间的延长,细胞伸出较多突起,细胞融合成片,培养12-18d呈多层生长。②大鼠成骨细胞碱性磷酸酶染色结果:镜下见90%的细胞呈碱性磷酸酶染色阳性。③成骨细胞培养上清液碱性磷酸酶及骨钙素含量:成骨细胞碱性磷酸酶和骨钙素明显高于成纤维细胞(P〈0.01)。④去势与非去势大鼠成骨细胞内雌激素受体β的表达结果:应用酶促低物染色法测定,非去势组雌激素受体β表达在2个月龄组呈低度表达(90.81.2.20),4,6个月组雌激素受体β开始呈现上升趋势(121.10&;#177;5.78,143.20&;#177;4.41)至8,10个月组雌激素受体β达到高峰(186.10&;#177;6.60,190.90&;#177;6.10),10月组以后表达呈现下降趋势;去势组2,4,6,8,10,12个月组雌激素受体β都呈低度表达(87.80&;#177;2.51,89.50&;#177;2.72,89.81&;#177;2.43,90.59&;#177;2.34,92.52&;#177;2.62,90.39&;#177;2.53),除2个月龄组以外,其他各月龄组非去势组均显著高于去势组(P〈0.05,0.01)。结论:①本实验采用酶消化法培养的细胞符合成骨细胞的生物学特征,具备成骨细胞功能。②去势大鼠在观察的不同时限点均出现成骨细胞雌激素受体β表达较同月龄非去势大鼠显著减少,说明去势影响成骨细胞内雌激素受体β的表达。  相似文献   

2.
目的:观察不同剂量雌激素,卵泡雌激素及黄体生成素对大鼠成骨细胞雌激素受体β表达的影响。方法:实验于2004-02/08在哈尔滨医科大学第二临床医学院科研中心完成。①取三四个月龄雌性Wistar大鼠28只用于大鼠成骨细胞体外培养。采用二次酶消化、反复贴壁法分离纯化培养大鼠成骨细胞。观察其形态、改良钙钴法碱性磷酸酶染色,培养上清碱性磷酸酶、骨钙素测定来鉴定成骨细胞。②取2代培养的成骨细胞用无血清培养基培养24h,分为10组:对照组,1×10-10,1×10-8,1×10-6mol/L17β-雌二醇组,10,100,1000U/L黄体生成素组,1×10-7,1×10-6,1×10-5g/L卵泡刺激素组。每组3个孔。对照组加入基础培养基,其他各组分别加入相应终浓度药物,培养24~48h。大鼠成骨细胞雌激素受体表达阳性细胞数检测应用免疫组织化学法测定,以细胞浆有棕黄色颗粒沉积为阳性。成骨细胞雌激素受体β表达检测应用半定量免疫印渍酶促底物染色法以及化学发光法,以A值越高,说明雌激素受体β表达越多。结果:①成骨细胞形态及特征性鉴定:成骨细胞随培养时间的延长,细胞呈指数增长,分泌碱性磷酸酶和骨钙素,碱性磷酸酶染色阳性率为90%,表现出旺盛的分泌功能。②成骨细胞雌激素受体表达阳性细胞数检测结果:不同剂量卵泡刺激素组和黄体生成素组对雌激素受体表达无明显影响;雌激素1×10-8mol/L组和1×10-6mol/L组显著高于对照组[(90.95±5.89),(95.12±6.17),(81.44±5.37)个数/100个细胞,t=2.95,P<0.05;t=3.50,P<0.01]。③成骨细胞雌激素受体β表达结果:不同剂量卵泡刺激素及黄体生成素对雌激素受体β的表达无明显影响;随雌激素浓度的增加成骨细胞雌激素受体β表达呈上升趋势。结论:雌激素能促进成骨细胞雌激素受体β的表达,且表现出剂量依赖性。而黄体生成素、卵泡刺激素对雌激素受体β表达无直接影响。  相似文献   

3.
张伟  陶树清  穆臣会 《中国临床康复》2005,9(23):172-174,i004
目的:观察不同剂量雌激素,卵泡雌激素及黄体生成素对大鼠成骨细胞雌激素受体β表达的影响。方法:实验于2004-02/08在哈尔滨医科大学第二临床医学院科研中心完成。①取三四个月龄雌性Wistar大鼠28只用于大鼠成骨细胞体外培养。采用二次酶消化、反复贴壁法分离纯化培养大鼠成骨细胞。观察其形态、改良钙钴法碱性磷酸酶染色,培养上清碱性磷酸酶、骨钙素测定来鉴定成骨细胞。②取2代培养的成骨细胞用无血清培养基培养24h,分为10组:对照组,1&;#215;10^10,1&;#215;10^-8,1&;#215;10^-6mol/L 17β-雌二醇组,10,100,1000U/L黄体生成素组,1&;#215;10^-7,1&;#215;10^-6,1&;#215;10^-5g/L卵泡刺激素组。每组3个孔。对照组加入基础培养基,其他各组分别加入相应终浓度药物,培养24-48h。大鼠成骨细胞雌激素受体表达阳性细胞数检测应用免疫组织化学法测定,以细胞浆有棕黄色颗粒沉积为阳性。成骨细胞雌激素受体β表达检测应用半定量免疫印渍酶促底物染色法以及化学发光法,以A值越高,说明雌激素受体β表达越多。结果:①成骨细胞形态及特征性鉴定:成骨细胞随培养时间的延长,细胞呈指数增长,分泌碱性磷酸酶和骨钙素,碱性磷酸酶染色阳性率为90%,表现出旺盛的分泌功能。②成骨细胞雌激素受体表达阳性细胞数检测结果:不同剂量卵泡刺激素组和黄体生成素组对雌激素受体表达无明显影响;雌激素1&;#215;10^-8mol/L组和1&;#215;10^-6mol/L组显著高于对照组[(90.95&;#177;5.89),(95.12&;#177;6.17),(81.44&;#177;5.37)个数/100个细胞,τ=2.95,P&;lt;0.05;τ=3.50,P&;lt;0.01]。③成骨细胞雌激素受体β表达结果:不同剂量卵泡刺激素及黄体生成素对雌激素受体β的表达无明显影响;随雌激素浓度的增加成骨细胞雌激素受体β表达呈上升趋势。结论:雌激素能促进成骨细胞雌激素受体β的表达,且表现出剂量依赖性。而黄体生成素、卵泡刺激素对雌激素受体β表达无直接影响。  相似文献   

4.
背景白细胞介素6、骨钙素和骨碱性磷酸酶均参与骨代谢过程,其与骨质疏松的发生有相关性.目的观察白细胞介素6、骨钙素和骨碱性磷酸酶在骨质疏松大鼠中的表达特征.设计随机分组观察对比实验.单位深圳市人民医院(暨南大学医学院第二附属医院)骨科.材料实验于2002-01/2003-01在深圳市人民医院动物实验室及中心实验室完成.6月龄雌性SD大鼠60只,平均体质量250 g,随机分为3组去势组,对照组,空白组,每组20只.方法去势组手术切除大鼠双侧卵巢建立骨质疏松动物模型;对照组开腹后将卵巢提出腹腔后还纳关腹;空白组不行任何处理.分别于术后2,3,4,5,6个月后每组随机抽出大鼠4只,进行骨密度、骨钙素、白细胞介素6及碱性磷酸酶检测.主要观察指标大鼠全身骨密度、血清骨钙素、血清白细胞介素6及血清骨碱性磷酸酶变化.结果60只大鼠均进入结果分析.①大鼠骨密度测量结果4,5,6个月去势组骨密度较对照组和空白组明显下降[4个月(0.139 5±0.007 8),(0.147 0±0.000 8),(0.145 9±0.002 9)g/cm2,5个月(0.137 9±0.000 9),(0.145 6±0.000 8),(0.144 7±0.000 5)g/cm2,6个月(0.122 6±0.000 4),(0.145 0±0.002 1),(0.144 0±0.000 9)g/cm2,P<0.05或<0.01].②大鼠血清骨钙素测量结果4个月后去势组骨钙素显著高于对照组与空白组(P>0.05).③大鼠白细胞介素6检测结果各时间点去势组白细胞介素6均显著高对照组与空白组(P>0.05)④大鼠血清骨碱性磷酸酶4,5,6个月去势组骨碱性磷酸酶显著高于对照组与空白组[(2026±4)比(1247±12),(1291±7)nkat/L,(2342±9)比(1273±18),(1342±12)nkat/L,(2633±15)比(1340±9),(1357±8)nkat/L,P<0.05]结论在骨质疏松症大鼠中骨密度显著降低,白细胞介素6、骨钙素和骨碱性磷酸酶在骨质疏松症大鼠中有显著表达,可作为骨质疏松症的诊断及筛查指标.  相似文献   

5.
背景:大豆异黄酮是一类植物雌激素,对绝经后骨质疏松症治疗具有重要意义。目的:进一步验证大豆异黄酮对去势大鼠骨密度和成骨细胞雌激素受体α表达的影响。方法:将12月龄去势雌性SD大鼠随机分为3组,大豆异黄酮组和对照组大鼠摘除双侧卵巢,假手术组只进行手术入路,不切除卵巢。大豆异黄酮组切除卵巢后,每日灌胃大豆异黄酮,连续40d。对照组喂等量生理盐水。结果与结论:喂饲40d后对照组大鼠左侧股骨骨密度值显著低于假手术组(P〈0.05),提示骨质疏松模型成功。大豆异黄酮组大鼠左侧股骨骨密度高于对照组(P〈0.05);大豆异黄酮组雌激素受体α的表达量高于对照组(P〈0.05)。提示大豆异黄酮可增加去势大鼠骨密度,提高去势大鼠成骨细胞雌激素受体α的表达,促进成骨细胞增殖。  相似文献   

6.
目的:研究雄性大鼠一生中成骨细胞内雄激素受体(androgenreceptor,AR)的表达水平的变化规律,同时通过雄性大鼠血清睾酮含量变化及规律来进一步探讨雄激素在骨质疏松中的作用机制。方法:实验于2003-06/2004-07在哈尔滨医科大学附属第二医院实验动物中心完成。用放免法对不同月龄大鼠进行睾酮测定,采用二次酶消化、反复贴壁法分离纯化培养大鼠成骨细胞,并进行鉴定,应用半定量Westernblot法对不同月龄雄性Wistar大鼠成骨细胞内雄激素受体进行检测。结果:①AR表达在1,2月龄组呈低度表达,分别为87.70±2.68,90.74±2.06(染色法)。4月龄组AR开始呈现上升趋势,6月龄组以后AR表达开始明显增高,至10,12,14月组AR达到高峰,分别为142.9±4.73,154.2±6.67,190.6±5.80(染色法)。16月组以后表达呈现下降趋势。②不同月龄雄性大鼠血清睾酮浓度亦呈规律性分布。③血清睾酮与雄激素受体的表达有明显的相关关系(R=0.1675,P<0.01)。结论:①AR表达在不同月龄大鼠呈规律性分布,AR的表达应与雄激素水平是相一致的。②雄激素直接与成骨细胞的AR结合或在5-ɑ还原酶的作用下变成双氢睾酮(DHT)后与AR结合来调控成骨细胞的一系列功能是雄激素在体内维持骨稳态的主要作用途径。  相似文献   

7.
目的:观察脉冲电磁场对去卵巢骨质疏松大鼠骨代谢的影响,探讨脉冲电磁场(pulsedelectromagneticfields,PEMFs)对绝经后骨质疏松的治疗作用及机制。方法:6月龄雌性Wistar大鼠40只,按体质量单纯随机抽样分为4组:脉冲电磁场治疗组(脉冲电磁场组),雌激素治疗组(雌激素组),骨质疏松模型对照组(对照组);假手术正常对照组(对照组)。每组10只,分别在去势后8周开始治疗;治疗8周后测定血钙、血磷、血清碱性磷酸酶、血清抗酒石酸磷酸酶、血清骨钙素和尿钙、尿磷、尿羟脯氨酸。结果:各组血钙、血磷(mmol/L)差异均无显著性(2.18±0.05~2.21±0.20;F=0.11,1.41,P>0.05);脉冲电磁场组、雌激素组和对照组尿钙、尿磷和尿羟脯氨酸低于骨质疏松组,有非常显著差异(F=169.25,759.33,36.24,P<0.01)。脉冲电磁场组、骨质疏松组血清骨钙素(μg/L)高于对照组和雌激素组,有非常显著差异(2.56±0.22~3.54±0.18;F=45.58,P<0.01);血清碱性磷酸酶检测结果与血清骨钙素相似,各组间有显著性差异(2.47±0.30~5.21±0.09;F=156.29,P<0.01)。血清抗酒石酸磷酸酶(u/L)之间的关系是:骨质疏松组(2.45±0.09)>脉冲电磁场组(1.85±0.29)>雌激素组(1.61±0.16)>对照组(1.21±0.08),各组差异有显著性意义(F=78.74,P<0.05~0.01)。结论:PEMFs具  相似文献   

8.
目的:通过观察雌激素对去卵巢骨质疏松模型大鼠成骨细胞膜型基质金属蛋白酶(membrane-typematrixmetalloproteinase-1,MT1-MMP)基因的表达,探讨雌激素防治骨质疏松症的机制。方法:选用7个月龄雌性SD大鼠36只,对去卵巢大鼠、对照假手术大鼠与17β-雌二醇(E2)治疗组大鼠进行骨密度检测。股骨远端行原位杂交检测骨组织MT1-MMPmRNA表达,免疫组化检测骨组织MT1-MMP蛋白质表达。结果:与对照组犤(L3=0.156±0.010)g/cm2犦相比,去卵巢大鼠骨密度犤(L3=0.139±0.009)g/cm2犦减少,予E2治疗后骨密度犤(L3=0.168±0.010)g/cm2犦增加(t=0.03~0.04,P<0.05)。与对照组相比,去卵巢大鼠成骨细胞MT1-MMPmRNA与蛋白质表达下调,而予E2治疗后成骨细胞MT1-MMPmRNA与蛋白质表达增加。结论:雌激素可促进成骨细胞MT1-MMP基因表达,此可能为雌激素防治骨质疏松症的重要机制之一。  相似文献   

9.
背景:白细胞介素6、骨钙素和骨碱性磷酸酶均参与骨代谢过程,其与骨质疏松的发生有相关性。 目的:观察白细胞介素6、骨钙素和骨碱性磷酸酶在骨质疏松大鼠中的表达特征。 设计:随机分组观察对比实验。 单位:深圳市人民医院(暨南大学医学院第二附属医院)骨科。 材料:实验于2002—01/2003-01在深圳市人民医院动物实验室及中心实验室完成。6月龄雌性SD大鼠60只,平均体质量250g,随机分为3组:去势组,对照组,空白组,每组20只。方法:去势组手术切除大鼠双侧卵巢建立骨质疏松动物模型;对照组开腹后将卵巢提出腹腔后还纳关腹;空白组不行任何处理。分别于术后2,3,4,5,6个月后每组随机抽出大鼠4只,进行骨密度、骨钙素、白细胞介素6及碱性磷酸酶检测。 主要观察指标:大鼠全身骨密度、血清骨钙素、血清白细胞介素6及血清骨碱性磷酸酶变化。 结果:60只大鼠均进入结果分析。①大鼠骨密度测量结果:4,5,6个月去势组骨密度较对照组和空白组明显下降[4个月:(0.1395&;#177;0.0078),(0.147&;#177;0.0008),(0.1459&;#177;0.0029)g/cm^2.5个月:(0.1379&;#177;0.0009).(0.1456&;#177;0.0008),(0.1447&;#177;0.0005)g/cm^2,6个月:(0.1226&;#177;0.0004).(0.1450&;#177;0.0021),(0.1440&;#177;0.0009)g/cm^2,P〈0.05或〈0.011。②大鼠血清骨钙素测量结果:4个月后去势组骨钙素显著高于对照组与空白组(P〉0.05)。③大鼠白细胞介素6检测结果:各时间点去势组白细胞介素6均显著高对照组与空白组(P〉0.05)④大鼠血清骨碱性磷酸酶:4,5,6个月去势组骨碱性磷酸酶显著高于对照组与空白组[(2026&;#177;4)比(1247&;#177;12),(1291&;#177;7)nkat/L,(2342&;#177;9)比(1273&;#177;18),(1342&;#177;12)nkat/L.(2633&;#177;15)比(1340&;#177;9),(1357&;#177;8)nkat/L,P〈0.05] 结论:在骨质疏松症大鼠中骨密度显著降低,白细胞介素6、骨钙素和骨碱性磷酸酶在骨质疏松症大鼠中有显著表达,可作为骨质疏松症的诊断及筛查指标。  相似文献   

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复合振动预防去势大鼠骨质疏松的实验研究   总被引:1,自引:3,他引:1  
目的:观察低强度复合振动对去势SD雌性大鼠生长期骨密度的影响。方法:4月龄SD雌性未育大鼠48只随机分为正常对照组(假手术组)、去势对照组以及4个去势振动组,每组8只。两对照组不作振动干预,4个振动组分别接振不同参数振动,干预时间13周。比较大鼠体重,腰椎、股骨骨密度,骨转换标志物(血清骨钙素、碱性磷酸酶、非前列腺酸性磷酸酶、Ⅰ型胶原C端肽)值。结果:实验开始后除正常对照组外,其余各组体重均明显增加。各组股骨骨密度均增加.差异无显著性意义,振动3、4组与正常对照组较去势对照组腰椎骨密度显著性增加。骨转换标志物各组差异无显著性意义。结论:一定的复合振动可以增加去势SD大鼠腰椎骨密度,具有潜在的预防骨质疏松作用。  相似文献   

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Spontaneously hypertensive rats   总被引:2,自引:0,他引:2  
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The objective of this study was to determine whether myenteric denervation of the abdominal esophagus using benzalkonium chloride (BAC) leads to esophageal achalasia with changes of the muscle propria and epithelial cell proliferation. The treatment led to megaesophagus 3 months after BAC application. Denervation of the esophagus induced muscle hypertrophy and increased epithelial cell proliferation. The imbalance of the neurotransmitters may play a role in these morphokinetic changes.  相似文献   

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目的:对比SD大鼠和Wistar大鼠皮下脂肪源干细胞(adipose-derived stem cells,ADSCs)体外诱导分化能力,为ADSCs的进一步应用提供实验依据。方法:SD大鼠和Wistar大鼠各6只取腹股沟脂肪垫,培养扩增ADSCs,相差显微镜下观察两个品系来源的ADSCs的形态。用第4代细胞进行成骨和成脂诱导,分别用茜素红和油红O染色观察向成骨细胞分化后的矿化结节和向脂肪细胞分化后的脂质沉积。结果:两个品系来源的ADSCs在细胞形态上没有显著区别,都能进行成骨和成脂诱导分化。结论:SD大鼠和Wistar大鼠腹股沟脂肪垫来源的ADSCs诱导分化能力差异无显著性。  相似文献   

15.
Capillary leak accompanying systemic inflammatory response conditions is a significant clinical problem. In the present study, we describe and verify a method for studying capillary leak that is based on the injection of proteins that differ significantly in size and have spectrally distinguishable fluorophores. Control (n=11) and post-CLP (caecal ligation and puncture; n=14) Sprague-Dawley rats were injected with tracer amounts of albumin and PEG-Alb [albumin covalently linked to methoxy-poly(ethylene glycol)] labelled with fluorescein and Texas Red. Blood samples were withdrawn between 5 min and 144 h, and the fluorescence of the labelled proteins was determined. The relative retention of the PEG-Alb and albumin was assessed via measurement of the TER (transcapillary escape rate; in %/h) and the t(50%) estimate, defined as the time when the actual concentration reached 50% of its baseline. The concentration-time trends for both albumin and PEG-Alb tracers exhibited two-compartmental behaviour and were analysed using bi-exponential modelling. Retention times were significantly greater for PEG-Alb in both control and CLP rats. TER(PEG-Alb) was significantly lower than TER(albumin) for both control (8.1+/-5.6 compared with 14.8+/-7.1 %/h respectively; P<0.01) and CLP (14.8+/-6.6 compared with 22.5+/-7.3 %/h respectively; P<0.001) rats. The t(50%[PEG-Alb]) was substantially greater than the corresponding t(50%[albumin]) for both control (29.8+/-9.8 compared with 7.2+/-2.0 h respectively; P<0.001) and CLP (12.9+/-5.6 compared with 5.1+/-1.6 h respectively; P<0.001) rats. The result was similar irrespective of the fluorophore-protein combination, validating the multifluorophore technique. In conclusion, the double-fluorophore approach described in the present study may provide the future basis for a method to quantify capillary leak in disease.  相似文献   

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Rats are frequently used as an animal model for studies of the antithrombotic action of aspirin. The purpose of this investigation was to explore factors that influence the systemic exposure to unhydrolyzed aspirin after oral and systemic administration of the drug to adult male Sprague-Dawley rats. The experiments were performed according to a crossover design, and drug concentration measurements were made on whole blood. Intravenous injection and oral administration of aspirin (200 mg/kg) showed that the drug is eliminated rapidly (total clearance approximately 45 ml/min/kg; half-life approximately 8 min), that only about one-fourth of the dose is absorbed intact, and that the systemic availability of the oral dose is highly variable (coefficient of variation approximately 60%). A 40 mg/kg i.v. dose was cleared almost twice as rapidly as a 200 mg/kg i.v. dose. Injection of salicylic acid to yield concentrations similar to those obtained after injection of the large dose of aspirin (approximately 400 mg/l) reduced the total clearance of a 40 mg/kg i.v. dose of aspirin by about one-third, suggesting product inhibition of ester hydrolysis. The systemic availability of aspirin infused into the portal circulation was about 80% over a wide range of infusion rates, showing that presystemic hydrolysis of the drug occurs mainly in the gut. As in humans, absorption of orally administered aspirin affects the exponential decline of aspirin concentrations in blood, resulting in an apparent half-life substantially longer than the actual biologic half-life of the drug after i.v. injection.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

17.
Context/objectives. Fomepizole has been utilized with remarkable success for ethylene glycol and methanol poisonings in children and adults. However, very little information is available regarding the safe and effective use of fomepizole in pregnancy. The goal of this research was to utilize an animal model to investigate the kinetics of fomepizole in pregnancy. Materials/methods. Male and pregnant Sprague-Dawley rats, which were obtained at 19 days gestation, were administered fomepizole 15 mg/kg intraperitoneally. The animals were anesthetized and blood, liver, kidney, and fetus samples were collected at 1–24 hours post administration. Tissue samples were homogenized, deproteinized and prepared by solid phase extraction. Fomepizole concentrations from tissue and serum samples were analyzed using high pressure liquid chromatography. Results. Between males and pregnant females, tissue and serum fomepizole levels were similar. Fomepizole concentrations in whole fetal tissue were similar to those in the maternal liver and kidney tissue. Fetal fomepizole concentrations were fivefold higher than maternal serum concentrations. The zero order elimination rate of fomepizole from maternal serum was 7.6 mol/L/h, which was slightly slower than the elimination rate in male rats (12.9 mol/L/h). Elimination of fomepizole from the fetus followed a similar time course to that in the maternal tissues. Discussion/conclusion. Elevated concentrations of fomepizole were detected in the fetus following maternal administration. Although the levels of fomepizole in the fetal tissue would imply significant protection against fetal formation of toxic alcohol metabolites, further research is needed to explore the long-term effects of fomepizole on the fetus.  相似文献   

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