目的观察妊娠肝内胆汁淤积症(ICP)孕鼠肝脏、胎鼠脑组织结构变化;分析神经肽Y(NPY)在妊娠期肝内胆汁淤积症(ICP)胎鼠脑组织中的表达及意义。方法选择孕15 d SD大鼠,用孕酮及乙炔雌二醇建立孕鼠ICP模型,观察孕鼠肝脏和胎鼠脑组织的病理变...目的观察妊娠肝内胆汁淤积症(ICP)孕鼠肝脏、胎鼠脑组织结构变化;分析神经肽Y(NPY)在妊娠期肝内胆汁淤积症(ICP)胎鼠脑组织中的表达及意义。方法选择孕15 d SD大鼠,用孕酮及乙炔雌二醇建立孕鼠ICP模型,观察孕鼠肝脏和胎鼠脑组织的病理变化;应用免疫组织化学染色方法及图像分析检测ICP孕鼠(20例,实验组)及正常孕鼠(20例,对照组)脑组织中NPY的表达及定量。结果 ICP孕鼠血清丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、总胆酸(TBA)明显升高;光镜下见部分肝细胞有颗粒样变性和空泡变性。电镜下见肝组织中毛细胆管扩张、微绒毛肿胀,毛细胆管周围肝细胞内见电子致密物沉积。胎鼠脑组织疏松,空泡样变性明显,部分细胞溶解,甚至消失。实验组胎鼠脑组织NPY表达免疫阳性神经元主要位于海马区,免疫阳性细胞被染成棕黄色,免疫阳性颗粒主要分布在胞质和细胞膜表面。对照组海马区仅少部分细胞膜着色或无免疫着色。胎脑组织NPY的免疫组化结果用图像分析仪测定,结果显示:实验组NPY平均光密度值(1.0486±0.0182)明显高于对照组的(0.6297±0.0278),两者比较有显著性差异(P<0.05)。结论 ICP母鼠肝脏及胎鼠脑组织有明显病变,胎鼠脑组织中的NPY表达升高,可能与胎脑组织受损有关。展开更多
Expression of opioid receptor-like receptor (ORL1)and its endogenous peptide agonist nociceptin/orphaninFo (N/OFQ) during mouse embryogenesis have been investigated. Transcripts of ORL1 and N/OFQ were detected by RT-P...Expression of opioid receptor-like receptor (ORL1)and its endogenous peptide agonist nociceptin/orphaninFo (N/OFQ) during mouse embryogenesis have been investigated. Transcripts of ORL1 and N/OFQ were detected by RT-PCR in mouse brain of day 8 embryo (E8)and the expression continued afterwards. Northern blotanalysis revealed abundant expression of ORL1 at postnatal day 1 (P1) and N/OFQ at E17 and P1 in the brain butnone was detected in other embryonic tissues. The presence of functional ORL1 in mouse embryonic brain wasalso confirmed by specific binding of [3H] N/OFQ (kd=1.3±0.5 nM and Bmax = 72±9 fmol/mg protein) as wellas by N/OFQ-stimulated G protein activation.展开更多
文摘目的观察妊娠肝内胆汁淤积症(ICP)孕鼠肝脏、胎鼠脑组织结构变化;分析神经肽Y(NPY)在妊娠期肝内胆汁淤积症(ICP)胎鼠脑组织中的表达及意义。方法选择孕15 d SD大鼠,用孕酮及乙炔雌二醇建立孕鼠ICP模型,观察孕鼠肝脏和胎鼠脑组织的病理变化;应用免疫组织化学染色方法及图像分析检测ICP孕鼠(20例,实验组)及正常孕鼠(20例,对照组)脑组织中NPY的表达及定量。结果 ICP孕鼠血清丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、总胆酸(TBA)明显升高;光镜下见部分肝细胞有颗粒样变性和空泡变性。电镜下见肝组织中毛细胆管扩张、微绒毛肿胀,毛细胆管周围肝细胞内见电子致密物沉积。胎鼠脑组织疏松,空泡样变性明显,部分细胞溶解,甚至消失。实验组胎鼠脑组织NPY表达免疫阳性神经元主要位于海马区,免疫阳性细胞被染成棕黄色,免疫阳性颗粒主要分布在胞质和细胞膜表面。对照组海马区仅少部分细胞膜着色或无免疫着色。胎脑组织NPY的免疫组化结果用图像分析仪测定,结果显示:实验组NPY平均光密度值(1.0486±0.0182)明显高于对照组的(0.6297±0.0278),两者比较有显著性差异(P<0.05)。结论 ICP母鼠肝脏及胎鼠脑组织有明显病变,胎鼠脑组织中的NPY表达升高,可能与胎脑组织受损有关。
文摘Expression of opioid receptor-like receptor (ORL1)and its endogenous peptide agonist nociceptin/orphaninFo (N/OFQ) during mouse embryogenesis have been investigated. Transcripts of ORL1 and N/OFQ were detected by RT-PCR in mouse brain of day 8 embryo (E8)and the expression continued afterwards. Northern blotanalysis revealed abundant expression of ORL1 at postnatal day 1 (P1) and N/OFQ at E17 and P1 in the brain butnone was detected in other embryonic tissues. The presence of functional ORL1 in mouse embryonic brain wasalso confirmed by specific binding of [3H] N/OFQ (kd=1.3±0.5 nM and Bmax = 72±9 fmol/mg protein) as wellas by N/OFQ-stimulated G protein activation.