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Title: c-Maf Is Required for the Development of Dorsal Horn Laminae III/IV Neurons and Mechanoreceptive DRG Axon Projections
Author: Hu, Jia ; Huang, Tianwen ; Li, Tingting ; Guo, Zhen ; null(程乐平)
Source: JOURNAL OF NEUROSCIENCE
Issued Date: 2012
Volume: 32, Issue:16, Pages:5362-5373
Keyword: VESICULAR GLUTAMATE TRANSPORTERS ; SPINAL-CORD ; SENSORY NEURONS ; TRANSMITTER PHENOTYPES ; TRANSCRIPTION FACTORS ; PROPER DEVELOPMENT ; ROOT GANGLIA ; CELL FATE ; EXPRESSION ; GENES
Subject: Neurosciences & Neurology
Corresponding Author: Cheng, LP (reprint author), Chinese Acad Sci, Inst Neurosci, 320 Yue Yang Rd, Shanghai 200031, Peoples R China,lpcheng@ion.ac.cn
English Abstract: Establishment of proper connectivity between peripheral sensory neurons and their central targets is required for an animal to sense and respond to various external stimuli. Dorsal root ganglion(DRG) neurons convey sensory signals of different modalities via their axon projections to distinct laminae in the dorsal horn of the spinal cord. In this study, we found that c-Maf was expressed predominantly in the interneurons of laminae III/IV, which primarily receive inputs from mechanoreceptive DRG neurons. In the DRG, c-Maf(+) neurons also coexpressed neurofilament-200, a marker for the medium-and large-diameter myelinated afferents that transmit non-noxious information. Furthermore, mouse embryos deficient in c-Maf displayed abnormal development of dorsal horn laminae III/IV neurons, as revealed by the marked reduction in the expression of several marker genes for these neurons, including those for transcription factors MafA and Rora, GABA(A) receptor subunit alpha 5, and neuropeptide cholecystokinin. In addition, among the four major subpopulations of DRG neurons marked by expression of TrkA, TrkB, TrkC, and MafA/GFR alpha 2/Ret, c-Maf was required selectively for the proper differentiation of MafA (+)/Ret (+)/GFR alpha 2 (+) low-threshold mechano-receptors (LTMs). Last, we found that the central and peripheral projections of mechanoreceptive DRG neurons were compromised in c-Maf deletion mice. Together, our results indicate that c-Maf is required for the proper development of MafA (+)/Ret (+)/GFR alpha 2 (+) LTMs in the DRG, their afferent projections in the dorsal horn and Pacinian corpuscles, as well as neurons in laminae III/IV of the spinal cord.
Indexed Type: sci
Language: 英语
Content Type: 期刊论文
URI: http://ir.sibs.ac.cn/handle/331001/1490
Appears in Collections:神经所(总)_期刊论文
神经发育及其调控机理研究组_期刊论文

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Hu, Jia; Huang, Tianwen; Li, Tingting; Guo, Zhen; Cheng, Leping.c-Maf Is Required for the Development of Dorsal Horn Laminae III/IV Neurons and Mechanoreceptive DRG Axon Projections,JOURNAL OF NEUROSCIENCE,2012,32(16):5362-5373
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