Determination of the connectivity of newborn neurons in mammalian olfactory circuits
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- 作者：Namasivayam Ravi ; Luis Sanchez-Guardado…
- 关键词：Development ; Synaptogenesis ; Cell fate ; Transcription factor ; Mouse
- 刊名：Cellular and Molecular Life Sciences
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：74
- 期：5
- 页码：849-867
- 全文大小：
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Cell Biology; Biomedicine, general; Life Sciences, general; Biochemistry, general;
- 出版者：Springer International Publishing
- ISSN：1420-9071
- 卷排序：74
文摘
The mammalian olfactory bulb is a forebrain structure just one synapse downstream from the olfactory sensory neurons and performs the complex computations of sensory inputs. The formation of this sensory circuit is shaped through activity-dependent and cell-intrinsic mechanisms. Recent studies have revealed that cell-type specific connectivity and the organization of synapses in dendritic compartments are determined through cell-intrinsic programs already preset in progenitor cells. These progenitor programs give rise to subpopulations within a neuron type that have distinct synaptic organizations. The intrinsically determined formation of distinct synaptic organizations requires factors from contacting cells that match the cell-intrinsic programs. While certain genes control wiring within the newly generated neurons, other regulatory genes provide intercellular signals and are only expressed in neurons that will form contacts with the newly generated cells. Here, the olfactory system has provided a useful model circuit to reveal the factors regulating assembly of the highly structured connectivity in mammals.