Land Peter W, Monaghan A Paula
Department of Neurobiology, W1458 Biomedical Science Tower, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.
Brain Res Dev Brain Res. 2005 Aug 8;158(1-2):97-101. doi: 10.1016/j.devbrainres.2005.04.006.
Absence of the transcription factor tailless (tlx) leads to premature laminar development and thinning of neocortex. We used zinc autometallography to determine if tailless deletion alters the organization of cortical circuits. In tlx-/- mice, layer 4 barrels, which normally lack synaptic zinc, are densely innervated by zinc-containing terminals. Furthermore, barrels with zinc inputs are constructed, in part, from zinc-sequestering neurons, a phenotype not normally found in layer 4.
转录因子无尾(tlx)的缺失会导致新皮层的层状发育过早和变薄。我们使用锌自动放射自显影术来确定无尾缺失是否会改变皮质回路的组织。在tlx基因敲除小鼠中,通常缺乏突触锌的第4层桶状结构被含锌终末密集支配。此外,有锌输入的桶状结构部分由锌螯合神经元构成,这是第4层通常不会出现的一种表型。