Cited by 346Ion Channels and ReceptorsIon channel regulation and functionCalcium signaling and nucleotide metabolism

Activation of a TRPC3-Dependent Cation Current through the Neurotrophin BDNF

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Li, Hong-Sheng, Xu, Xian-Zhong Shawn, Montell, Craig·1999·Neuron

Abstract

Nonvoltage-gated cation currents, which are activated following stimulation of phospholipase C (PLC), appear to be major modes for Ca2+ and Na+ entry in mammalian cells. The TRPC channels may mediate some of these conductances since their expression in vitro leads to PLC-dependent cation influx. We found that the TRPC3 protein was highly enriched in neurons of the central nervous system (CNS). The temporal and spatial distribution of TRPC3 paralleled that of the neurotrophin receptor TrkB. Activation of TrkB by brain-derived nerve growth factor (BDNF) led to production of a PLC-dependent, nonselective cation conductance in pontine neurons. Evidence is provided that TRPC3 contributes to this current in vivo. Thus, activation of TrkB and PLC leads to a TRPC3-dependent cation influx in CNS neurons.

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Crossref · 10.1016/s0896-6273(00)80838-7

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  • Bath application of a low concentration (20 ng/ml) of BDNF did not by itself induce spine-head enlargement (n=30).

    “Bath application of a low concentration (20 ng/ ml) of BDNF did not by itself induce spine-head enlargement (n = 30) (Fig. 4A) or inward currents (0.5 ± 1.2 pA, n = 5) (Fig. 4B) (19, 20).”

    From Protein synthesis and neurotrophin-dependent structural plasticity of single dendritic spines (2008) · cites this paper as [20]

    The Figure 4 caption reports that 100 ng/ml BDNF induced an inward current in isolated pontine neurons; it does not report spine-head measurements. Searches for spine-head enlargement and 20 ng/ml BDNF found no passage addressing whether that dose enlarged spine heads in 30 samples. (LLM, conf=0.76)

    Experimental — accuracy not yet measured
  • Bath application of 20 ng/ml BDNF did not by itself induce inward currents (0.5 ± 1.2 pA, n=5).

    “Bath application of a low concentration (20 ng/ ml) of BDNF did not by itself induce spine-head enlargement (n = 30) (Fig. 4A) or inward currents (0.5 ± 1.2 pA, n = 5) (Fig. 4B) (19, 20).”

    From Protein synthesis and neurotrophin-dependent structural plasticity of single dendritic spines (2008) · cites this paper as [20]

    The Figure 4 caption and the section on BDNF-activated conductance report an inward current after 100 ng/ml BDNF in isolated pontine neurons. Searches for 20 ng/ml BDNF and the reported 0.5 ± 1.2 pA (n=5) result found no passage addressing that lower-dose experiment. A response at 100 ng/ml does not establish what happens at 20 ng/ml. (LLM, conf=0.73)

    Experimental — accuracy not yet measured

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Authors
Li, H.-S., Xu, X.-Z. S., & Montell, C.
Affiliations
Johns Hopkins University (US)
Corresponding author
Montell, Craig
Venue
Neuron
Publisher
Elsevier BV
Published
1999-09
Volume
24
Issue
1
Pages
261-273
ISSN
0896-6273 (ISSN-L)
OpenAlex
W1968399538
Cited by
345
References
55
Citations by year
2026: 6 · 2025: 3 · 2024: 9 · 2023: 9 · 2022: 11 · 2021: 5 · 2020: 6 · 2019: 6 · 2018: 10 · 2017: 11 · 2016: 10 · 2015: 11 · 2014: 11 · 2013: 12 · 2012: 18
FWCI
7.03
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
National Eye Institute (EY10852)
Topics
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
TRPC3, TRPC channels, brain-derived neurotrophic factor, TrkB receptor, neurotrophin signaling, phospholipase C, calcium influx, sodium influx, pontine neurons, central nervous system neurons, cation conductance
MeSH terms
Animals, Cations, Cell Line, Cerebral Cortex, Electric Conductivity, Humans, Ion Channels, Neurons, Type C Phospholipases, Pons, Tissue Distribution, Transfection, Brain-Derived Neurotrophic Factor, Receptor, trkB, TRPC Cation Channels, Rats

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