Environmental and cellular cues pattern dendritic growth and direct dendrites to their targets. However, little is known about the signals regulating interactions with the surrounding substrate. Dong et al. and Salzberg et al. now identify a tripartite ligand-receptor complex that conveys cues from the substrate necessary for the patterning of complex dendrites in C. elegans.
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http://dx.doi.org/10.1016/j.cell.2013.09.029 | DOI Listing |
Dev Cell
January 2019
Department of Genetics, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA. Electronic address:
The mechanisms that pattern and maintain dendritic arbors are key to understanding the principles that govern nervous system assembly. The activity of presynaptic axons has long been known to shape dendrites, but activity-independent functions of axons in this process have remained elusive. Here, we show that in Caenorhabditis elegans, the axons of the ALA neuron control guidance and extension of the 1° dendrites of PVD somatosensory neurons independently of ALA activity.
View Article and Find Full Text PDFCurr Biol
September 2016
Department of Genetics, Albert Einstein College of Medicine, Bronx, NY, 10461, USA; Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY, 10461, USA. Electronic address:
Sensory dendrite arbors are patterned through cell-autonomously and non-cell-autonomously functioning factors [1-3]. Yet, only a few non-cell-autonomously acting proteins have been identified, including semaphorins [4, 5], brain-derived neurotrophic factors (BDNFs) [6], UNC-6/Netrin [7], and the conserved MNR-1/Menorin-SAX-7/L1CAM cell adhesion complex [8, 9]. This complex acts from the skin to pattern the stereotypic dendritic arbors of PVD and FLP somatosensory neurons in Caenorhabditis elegans through the leucine-rich transmembrane receptor DMA-1/LRR-TM expressed on PVD neurons [8, 9].
View Article and Find Full Text PDFPLoS Genet
September 2014
Department of Genetics, Albert Einstein College of Medicine of Yeshiva University, Bronx, New York, United States of America; Dominick P. Purpura Department of Neuroscience, Albert Einstein College of Medicine of Yeshiva University, Bronx, New York, United States of America.
Animals sample their environment through sensory neurons with often elaborately branched endings named dendritic arbors. In a genetic screen for genes involved in the development of the highly arborized somatosensory PVD neuron in C. elegans, we have identified mutations in kpc-1, which encodes the homolog of the proprotein convertase furin.
View Article and Find Full Text PDFCell
October 2013
Department of Genetics, Albert Einstein College of Medicine of Yeshiva University, Bronx, NY 10461, USA.
Sensory dendrites depend on cues from their environment to pattern their growth and direct them toward their correct target tissues. Yet, little is known about dendrite-substrate interactions during dendrite morphogenesis. Here, we describe MNR-1/menorin, which is part of the conserved Fam151 family of proteins and is expressed in the skin to control the elaboration of "menorah"-like dendrites of mechanosensory neurons in Caenorhabditis elegans.
View Article and Find Full Text PDFCell
October 2013
Department of Physiology and Cellular Biophysics, Columbia University Medical Center, 630 West 168th Street, P&S 12-403, New York, NY 10032, USA.
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