GA结合蛋白GABPβ1是神经干/祖细胞增殖所必需的

GA结合蛋白(GABP)是一种广泛表达的转录因子，调节多种细胞类型的发育，包括成骨细胞、造血干细胞、B细胞和T细胞。然而，目前对其在中枢神经系统发育中的生物学功能知之甚少。在本研究中，我们发现GABP在神经干/祖细胞(NSPCs)中高表达，在神经元中低表达，并且GABPβ1对NSPCs的正常增殖是必需的。敲低GABPα导致GABPβ1表达水平升高，下调GABPβ1可显著降低NSPCs的增殖，而敲低GABPβ2对NSPCs的增殖无影响。我们观察到，与野生型细胞相比，GABPβ1L KO NSPCs的GABPβ1S mRNA水平增加了近21倍，并且在GABPβ1L KO NSPCs中敲低GABPβ1S可以进一步降低其增殖潜能。我们还发现敲低GABPβ1可促进NSPCs向神经元和星形胶质细胞分化。最后，我们鉴定了数十个与细胞增殖和分化密切相关的GABPβ1下游靶基因。综上所述，我们的结果表明GABPβ1L和GABPβ1S在调节NSPCs的正常增殖和分化中起重要作用。

GA-binding protein (GABP) is a widely expressed transcription factor that regulates the development of multiple cell types, including osteoblasts, hematopoietic stem cells, B cells, and T cells. However, its biological functions in central nervous system (CNS) development remain largely unclear. In this study, we found that GABP is highly expressed in neural stem/progenitor cells (NSPCs) and lowly expressed in neurons, and that GABPβ1 is essential for the normal proliferation of NSPCs. Knockdown of GABPα resulted in elevated expression of GABPβ1, while downregulation of GABPβ1 significantly reduced the proliferation of NSPCs; by contrast, knockdown of GABPβ2 had no effect on NSPC proliferation. We observed that compared with wild-type cells, the level of GABPβ1S mRNA in GABPβ1L knockout (KO) NSPCs was increased by nearly 21-fold, and that knockdown of GABPβ1S in GABPβ1L KO NSPCs further reduced their proliferation potential. We also found that knockdown of GABPβ1 promoted the differentiation of NSPCs into neurons and astrocytes. Finally, we identified dozens of downstream target genes of GABPβ1 that are closely associated with cell proliferation and differentiation. Collectively, our results demonstrate that GABPβ1L and GABPβ1S play critical roles in regulating the normal proliferation and differentiation of NSPCs.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于GA结合蛋白GABPβ1在神经干/祖细胞（NSPCs）增殖中的关键作用，通过敲低实验揭示GABPβ1对细胞增殖的必需性。数据集包含4个测序样本和16个图像样本，涉及小鼠胚胎期和成年期的实验数据，使用Illumina HiSeq测序和ZEISS 710成像技术，总大小为11.88 GB。数据发布于2023年，公开可访问，支持中枢神经系统发育研究。