scholarly journals Development of Neuronal Activity and Activity-dependent Expression of Brain-derived Neurotrophic Factor mRNA in Organotypic Cultures of Rat Visual Cortex

1999 ◽  
Vol 9 (8) ◽  
pp. 864-877 ◽  
Author(s):  
T. Gorba
2000 ◽  
Vol 150 (6) ◽  
pp. 1423-1434 ◽  
Author(s):  
Jing Du ◽  
Linyin Feng ◽  
Feng Yang ◽  
Bai Lu

Brain-derived neurotrophic factor (BDNF) has been shown to regulate neuronal survival and synaptic plasticity in the central nervous system (CNS) in an activity-dependent manner, but the underlying mechanisms remain unclear. Here we report that the number of BDNF receptor TrkB on the surface of hippocampal neurons can be enhanced by high frequency neuronal activity and synaptic transmission, and this effect is mediated by Ca2+ influx. Using membrane protein biotinylation as well as receptor binding assays, we show that field electric stimulation increased the number of TrkB on the surface of cultured hippocampal neurons. Immunofluorescence staining suggests that the electric stimulation facilitated the movement of TrkB from intracellular pool to the cell surface, particularly on neuronal processes. The number of surface TrkB was regulated only by high frequency tetanic stimulation, but not by low frequency stimulation. The activity dependent modulation appears to require Ca2+ influx, since treatment of the neurons with blockers of voltage-gated Ca2+ channels or NMDA receptors, or removal of extracellular Ca2+, severely attenuated the effect of electric stimulation. Moreover, inhibition of Ca2+/calmodulin-dependent kinase II (CaMKII) significantly reduced the effectiveness of the tetanic stimulation. These findings may help us to understand the role of neuronal activity in neurotrophin function and the mechanism for receptor tyrosine kinase signaling.


2021 ◽  
Vol 17 (7) ◽  
pp. 1371-1379
Author(s):  
Di Liu ◽  
Ying Li ◽  
Jiechen Liu ◽  
Zhiyuan Shen ◽  
Fengying Wang ◽  
...  

Occlusal trauma (OT), by causing periodontal tissue damage, can activate and enhance the activity of the peripheral and central nervous system (CNS) neuropeptides. The brain-derived neurotrophic factor (BDNF) gene is activity-dependent and exhibits marked alterations, characterized by protection against injury and repair. Our results show the possible molecular mechanism through which noxious environmental stimuli induce alterations in BDNF activity in the local periodontal tissue, the primary sensory neurons-Vc, and the hippocampus, suggesting systemic impairment. BDNF serves a more positive and enduring trauma protection and repair function in Vc compared to that in local dental tissue.


1997 ◽  
Vol 17 (12) ◽  
pp. 4527-4535 ◽  
Author(s):  
Lana C. Rutherford ◽  
Andrew DeWan ◽  
Holly M. Lauer ◽  
Gina G. Turrigiano

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