首页> 外文期刊>DNA and Cell Biology >LBP-1b, LBP-9, and LBP-32/MGR detected in syncytiotrophoblasts from first-trimester human placental tissue and their transcriptional regulation
【24h】

LBP-1b, LBP-9, and LBP-32/MGR detected in syncytiotrophoblasts from first-trimester human placental tissue and their transcriptional regulation

机译:早孕人类胎盘组织合体滋养细胞中检测到的LBP-1b,LBP-9和LBP-32 / MGR及其转录调控

获取原文
获取原文并翻译 | 示例
           

摘要

LBP-1b, LBP-9, and LBP-32/MGR (LBP proteins) are transcriptional factors that regulate the expression of the P450 side-chain cleavage enzyme (P450scc) in the human placenta. Placenta contains at least two types of trophoblasts: cytotrophoblasts and syncytiotrophoblasts. P450scc has been detected in syncytiotrophoblasts through all stages of pregnancy. The expression of LBP proteins in different placental stages is unknown. We isolated total RNA from cytotrophoblasts and syncytiotrophoblasts of both first-trimester and full-term human placenta. The mRNA expressions of LBP proteins were detected only in the syncytiotrophoblasts from both first-trimester and full-term placenta. To determine the regulation among LBP proteins, we isolated the 5'-flanking region of one of the LBP proteins (LBP-32/MGR). After determining the transcriptional initiation site by a primer extension assay, we isolated and tested the activity of different lengths of the LBP-32/MGR promoter. A core promoter region for LBP32/MGR extending from -639 to -184bp was used to determine the interaction among LBP proteins. We cotransfected LBP-1b and LBP-9 with the LBP-32/MGR promoter and found that both stimulated LBP-32/MGR promoter activity. Our data suggested that an interaction exists among these transcriptional factors at the transcriptional level and provided us with information in our basic understanding of P450scc regulation.
机译:LBP-1b,LBP-9和LBP-32 / MGR(LBP蛋白)是调节人胎盘中P450侧链裂解酶(P450scc)表达的转录因子。胎盘含有至少两种类型的滋养细胞:细胞滋养细胞和合胞体滋养细胞。在怀孕的所有阶段,在合体滋养细胞中都检测到了P450scc。 LBP蛋白在不同胎盘阶段的表达尚不清楚。我们从孕早期和足月人胎盘的滋养细胞和合体滋养细胞中分离了总RNA。 LBP蛋白的mRNA表达仅在早孕和足月胎盘的合体滋养细胞中检测到。为了确定LBP蛋白之间的调控,我们分离了一种LBP蛋白(LBP-32 / MGR)的5'侧翼区域。通过引物延伸分析确定转录起始位点后,我们分离并测试了不同长度的LBP-32 / MGR启动子的活性。 LBP32 / MGR的核心启动子区域从-639延伸至-184bp,用于确定LBP蛋白之间的相互作用。我们将LBP-1b和LBP-9与LBP-32 / MGR启动子共转染,发现两者均刺激LBP-32 / MGR启动子活性。我们的数据表明在转录水平上这些转录因子之间存在相互作用,并为我们提供了对P450scc调控的基本了解的信息。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号