Approxmately 97% of all transcriptional output of the human being is noncoding RNA(ncRNA),which has been found to play roles in a great variety of processes,and is becoming more andmore *** review is a general intrudu...
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Approxmately 97% of all transcriptional output of the human being is noncoding RNA(ncRNA),which has been found to play roles in a great variety of processes,and is becoming more andmore *** review is a general intruduction to the concept,classification and functions ofncRNA.
目的 应用内源性硫化氢(hydrogen sukfide,H2S)生成酶胱硫醚-γ-裂解酶(cystathionineγlyase,CSE)的抑制剂炔丙基甘氨酸(propargylglycine,PPG),探讨H2S在大鼠高肺血流性肺动脉高压形成中的作用.方法 雄性SD大鼠25只,体重120～140 g,随机分为分流组(n=9)、分流+PPG组(n=8)和假手术组(n=8).分流组及分流+PPG组大鼠经腹主动脉-下腔静脉穿刺术建立高肺血流动物模型,分流+PPG组大鼠腹腔内注射PPG 37.5 mg/(kg·d),分流组与假手术组大鼠每日给予等量生理盐水.分流术后4周,采用右心导管法测量各组大鼠肺动脉平均压(mean pulmonary pressure,MPAP),用敏感硫电极法测量大鼠血浆和肺组织H2S含量,分别计算大鼠心脏组织右心室/左心室+室间隔(right ventricle/left ventricle+septum,RV/LV+SP)和心脏重量/体重(heart weight/base weight,HW/BW)的值.结果 分流术后4周,分流组大鼠MPAP与假手术组比较差别无显著性;分流+PPG组大鼠MPAP较分流组及假手术组分别升高了17.70%和21.79%(P＜0.05);分流组血浆H2S含量比假手术组明显升高(50.12±6.13 vs 45.16±5.56,P＜0.05);分流+PPG组大鼠血浆H2S含量明显低于分流组和假手术组(38.56±4.98 vs 50.12±6.13、38.56±4.98 vs 45.16±5.56,P均＜0.05);分流+PPG组大鼠RV/LV+SP和HW/BW明显高于分流组和假手术组(0.33±0.03 vs 0.30±0.03、0.33±0.03 vs 0.29±0.02,P＜0.05).结论 内源性H2S在高肺血流性肺动脉高压形成过程中发挥保护性调节作用.
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