Publication Date:
2008-03-08
Description:
We report that developmental competition between sympathetic neurons for survival is critically dependent on a sensitization process initiated by target innervation and mediated by a series of feedback loops. Target-derived nerve growth factor (NGF) promoted expression of its own receptor TrkA in mouse and rat neurons and prolonged TrkA-mediated signals. NGF also controlled expression of brain-derived neurotrophic factor and neurotrophin-4, which, through the receptor p75, can kill neighboring neurons with low retrograde NGF-TrkA signaling whereas neurons with high NGF-TrkA signaling are protected. Perturbation of any of these feedback loops disrupts the dynamics of competition. We suggest that three target-initiated events are essential for rapid and robust competition between neurons: sensitization, paracrine apoptotic signaling, and protection from such effects.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3612357/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3612357/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deppmann, Christopher D -- Mihalas, Stefan -- Sharma, Nikhil -- Lonze, Bonnie E -- Niebur, Ernst -- Ginty, David D -- EY016281/EY/NEI NIH HHS/ -- F32 NS053187/NS/NINDS NIH HHS/ -- NS053187/NS/NINDS NIH HHS/ -- NS34814/NS/NINDS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2008 Apr 18;320(5874):369-73. doi: 10.1126/science.1152677. Epub 2008 Mar 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Solomon Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18323418" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Animals, Newborn
;
Apoptosis
;
Brain-Derived Neurotrophic Factor/metabolism
;
Cell Survival
;
Cells, Cultured
;
Computer Simulation
;
Feedback, Physiological
;
Gene Expression Profiling
;
*Gene Expression Regulation, Developmental
;
Mathematics
;
Mice
;
*Models, Neurological
;
Nerve Growth Factor/*metabolism
;
Nerve Growth Factors/metabolism
;
Neurons/cytology/*physiology
;
Oligonucleotide Array Sequence Analysis
;
Rats
;
Receptor, trkA/genetics/*metabolism
;
Receptors, Nerve Growth Factor/genetics/metabolism
;
Signal Transduction
;
Superior Cervical Ganglion/*cytology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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