Nagaraja Prashantha, Parashivamurthy Kavya, Sidnal Nandini, Mali Siddappa, Nagaraja Dakshyani, Reddy Sivarami
Department of Bioinformatics, Scientific Bio-Minds, Bangalore-560092.
Bioinformation. 2013 Aug 7;9(14):739-47. doi: 10.6026/97320630009739. eCollection 2013.
In order to define the undifferentiated transcriptional factors present in neurogenesis of pancreatic β-islet cells, we studied the effect of Pdx1 in embryonic stem cell derived endocrine lineage. There are undifferentiated transcriptional progenitors Pdx1+/Ptf1a+/Cpa1+ tracking the growth of acini, ducts, α and β-islet cells. The upregulated transcriptional factors Pdx1 and ngn3 specify consequences of cell cycle regulation in early gut endocrine cells. The undifferentiated transcriptional factors basic helix loop helix (bHLH) protein regulate Ptf1a+/Cpa1+ in acini, ducts and it also regulate ngn3 to decrease expression of insulin and other pancreas secretions. The Pdx1+ and other unknown gene mutations show abnormal growth of neurogenesis in endocrine lineages. Using microarray based gene expression analysis to determine undifferential gene ontology in tissue specific gene regulation and disease progression that common in both metabolic and biological signaling pathways. The data expression profiles of ngn3 of wild- type pancreatic islet and islet derived tumor stem cells provide information on endocrine specific ngn3 genes. Therefore, 3755 genes were significantly regulated by Ngn3 induced pancreatic islet cell development. Moreover 317 upregulated and 175 downregulated, 757 genes deemed as undifferential expressions in endocrine cell. Furthermore to predict signaling pathways that associates with diabetes is highlighted.
为了确定胰腺β胰岛细胞神经发生过程中存在的未分化转录因子,我们研究了Pdx1在胚胎干细胞衍生内分泌谱系中的作用。存在未分化的转录祖细胞Pdx1+/Ptf1a+/Cpa1+,它们追踪腺泡、导管、α和β胰岛细胞的生长。上调的转录因子Pdx1和ngn3决定了早期肠道内分泌细胞中细胞周期调控的结果。未分化的转录因子碱性螺旋环螺旋(bHLH)蛋白在腺泡和导管中调节Ptf1a+/Cpa1+,它还调节ngn3以降低胰岛素和其他胰腺分泌物的表达。Pdx1+和其他未知基因突变在内分泌谱系中显示出神经发生的异常生长。使用基于微阵列的基因表达分析来确定组织特异性基因调控和疾病进展中未分化的基因本体,这些在代谢和生物信号通路中都很常见。野生型胰岛和胰岛衍生肿瘤干细胞的ngn3数据表达谱提供了关于内分泌特异性ngn3基因的信息。因此,3755个基因受Ngn3诱导的胰岛细胞发育显著调控。此外,317个基因上调,175个基因下调,757个基因在内分泌细胞中被视为未分化表达。此外,还突出显示了与糖尿病相关的预测信号通路。