Long-Distance Control of Synapse Assembly by Target-Derived NGF.
Summary of "Long-Distance Control of Synapse Assembly by Target-Derived NGF."
We report a role for long-distance retrograde neurotrophin signaling in the establishment of synapses in the sympathetic nervous system. Target-derived NGF is both necessary and sufficient for formation of postsynaptic specializations on dendrites of sympathetic neurons. This, in turn, is a prerequisite for formation of presynaptic specializations, but not preganglionic axonal ingrowth from the spinal cord into sympathetic ganglia. We also find that NGF-TrkA signaling endosomes travel from distal axons to cell bodies and dendrites where they promote PSD clustering. Furthermore, the p75 neurotrophin receptor restricts PSD formation, suggesting an important role for antagonistic NGF-TrkA and p75 signaling pathways during retrograde control of synapse establishment. Thus, in addition to defining the appropriate number of sympathetic neurons that survive the period of developmental cell death, target-derived NGF also exerts control over the degree of connectivity between the spinal cord and sympathetic ganglia through retrograde control of synapse assembly. VIDEO
ABSTRACT:
Affiliation
The Solomon H. Snyder Department of Neuroscience and Howard Hughes Medical Institute, The Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Journal Details
This article was published in the following journal.
Name: Neuron
ISSN: 1097-4199
Pages: 422-434
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20696380
- DOI: http://dx.doi.org/10.1016/j.neuron.2010.07.018
Medical and Biotech [MESH] Definitions
Distance Perception
The act of knowing or the recognition of a distance by recollective thought, or by means of a sensory process which is under the influence of set and of prior experience.
Complement Membrane Attack Complex
A product of COMPLEMENT ACTIVATION cascade, regardless of the pathways, that forms transmembrane channels causing disruption of the target CELL MEMBRANE and cell lysis. It is formed by the sequential assembly of terminal complement components (COMPLEMENT C5B; COMPLEMENT C6; COMPLEMENT C7; COMPLEMENT C8; and COMPLEMENT C9) into the target membrane. The resultant C5b-8-poly-C9 is the "membrane attack complex" or MAC.
Remote Sensing Technology
Observation and aquisition of physical data from a distance by viewing and making measurements from a distance or receiving transmitted data from observations made at distant location.
Rats, Long-evans
An outbred strain of rats developed in 1915 by crossing several Wistar Institute white females with a wild gray male. Inbred strains have been derived from this original outbred strain, including Long-Evans cinnamon rats (RATS, INBRED LEC) and Otsuka-Long-Evans-Tokushima Fatty rats (RATS, INBRED OLETF), which are models for Wilson's disease and non-insulin dependent diabetes mellitus, respectively.
Transcription Factor Tfiib
An RNA POLYMERASE II specific transcription factor. It plays a role in assembly of the pol II transcriptional preinitiation complex and has been implicated as a target of gene-specific transcriptional activators.
PubMed Articles
Signaling Endosomes Trigger Synapse Assembly.
In this issue of Neuron, Sharma et al. report that target-derived NGF exerts long-distance control of postsynaptic assembly. A major advance is the discovery that TrkA signaling endosomes are retrogra...
The assembly and maturation of neural circuits require a delicate balance between synapse formation and elimination. The cellular and molecular mechanisms that coordinate synaptogenesis and synapse el...
Understanding the Structure and Function of the Immunological Synapse.
The immunological synapse has been an area of very active scientific interest over the last decade. Surprisingly, much about the synapse remains unknown or is controversial. Here we review some of t...
Neuron-glia signaling: Implications for astrocyte differentiation and synapse formation.
Glial cells are currently viewed as active partners of neurons in synapse formation. The close proximity of astrocytes to the synaptic cleft implicates that they strongly influence synapse function as...
Numerical distance effects in visual search.
We present three experiments in which observers searched for a target digit among distractor digits in displays in which the mean numerical target-distractor distance was varied. Search speed and accu...
Clinical Trials
The Mechanism of Melanocyte Self-Assembly on Biomaterials and the Functional Analysis
The aim of this study is to survey melanocytes in the ability of self-assembly on biomaterials and functional analysis in vitro. Also, this study may provide a better way for treatment of...
Helium-Hyperoxia and 6MWT Distance in COPD
We assessed the effect of altering inspired gas on the 6MWT distance in COPD. We hypothesized that HeO2 would improve walking distance and reduce shortness of breath compared to both RA...
The present study aims to evaluate safety, tolerability and immunogenicity of three lots of Chiron’s cell-derived subunit influenza vaccine in healthy adult subjects as compared to a con...
Effect of the Antiandrogen DDE on Anthropometric Measures at Birth
Experimental studies have documented the p'p-DDT, p'p-DDE (a metabolite of DDT) and other organochlorine (OC) compounds have estrogenic and/or antiandrogenic activities capable of altering...
Evaluating a Distance Learning Asthma Education Program for Pediatricians (The DALI Study)
The National Heart, Lung, and Blood Institute (NHLBI) has established guidelines for treating people with asthma. This study will evaluate the effectiveness of a distance learning program...
