Evidence map›Paper›PMID 19940191›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2009

Cleavage of proBDNF to BDNF by a tolloid-like metalloproteinase is required for acquisition of in vitro eyeblink classical conditioning.

Joyce Keifer, Boris E Sabirzhanov, Zhaoqing Zheng, Wei Li, Timothy G Clark

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
1.4field-weighted citation impact, top 24% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 38 citations in OpenAlex.

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  9. Long-term Administration of Salicylate-induced Changes in BDNF Expression and CREB Phosphorylation in the Auditory Cortex of Rats.Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology · 2018
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Joyce KeiferNeuroscience Group, Division of Basic Biomedical Sciences, University of South Dakota School of Medicine, Vermillion, South Dakota 57069, USA. jkeifer@usd.edu
Boris E Sabirzhanov
Zhaoqing Zheng
Wei Li
Timothy G Clark
University of South Dakota · US

Funding

VIRAL-MEDIATED RNA INTERFERENCE IN THE ADULT RAT BRAINP20RR015567 · NCRR · UNIVERSITY OF SOUTH DAKOTA · PI KOST, CURTIS K · 2000 to 2009
$16.3M
NEURONAL PATHWAYS UNDERLYING IN VITRO MOTOR LEARNINGR01NS051187 · NINDS · UNIVERSITY OF SOUTH DAKOTA · PI KEIFER, JOYCE · 2005 to 2013
$2.7M
NCRR NIH HHS P20 RR015567NINDS NIH HHS NS051187NINDS NIH HHS R01 NS051187
6 · The paper itself

Abstract

The tolloid/bone morphogenetic protein-1 family of metalloproteinases have an important role in the regulation of embryonic pattern formation and tissue morphogenesis. Studies suggest that they participate in mechanisms of synaptic plasticity in adults, but very little is known about their function. Recently, we isolated a reptilian ortholog of the tolloid gene family designated turtle tolloid-like gene (tTll). Here, we examined the role of tTLL in an in vitro model of eyeblink classical conditioning using an isolated brainstem preparation to assess its role in synaptic plasticity during conditioning. Analysis by real-time reverse transcription-PCR shows that an extracellularly secreted form of tTLL, tTLLs, is transiently expressed in the early stages of conditioning during conditioned response acquisition, whereas a cytosolic form, tTLLc, is not. Short interfering RNA (siRNA)-directed gene knockdown and rescue of tTLL expression demonstrate that it is required for conditioning. Significantly, we show that tTLLs cleaves the precursor proBDNF into mature BDNF in cleavage assay studies, and application of recombinant tTLLs protein alone to preparations results in induction of mature BDNF expression. The mature form of BDNF is minimally expressed in preparations treated with anti-tTLL siRNA, and the synaptic incorporation of both GluR1- and GluR4-containing AMPA receptors is significantly reduced, resulting in suppression of conditioning. This is the first study to demonstrate that expression of an extracellularly secreted tolloid-like metalloproteinase is regulated in the early stages of classical conditioning and functions in the conversion of proBDNF to mature BDNF. The mature form of BDNF is required for synaptic delivery of AMPA receptors and acquisition of conditioned responses.

Indexed as

AnimalsBrain-Derived Neurotrophic FactorBrain StemChlorocebus aethiopsConditioning, EyelidCOS CellsCytosolExtracellular FluidGlutamic AcidMiceNeuronal PlasticityNIH 3T3 CellsOrgan Culture TechniquesReceptors, AMPARecombinant Fusion ProteinsRNA, Small InterferingBrain-Derived Neurotrophic FactorGlutamic AcidReceptors, AMPARecombinant Fusion ProteinsRNA, Small InterferingTolloid-Like Metalloproteinases

Identifiers

PMID19940191
PMCPMC2825740
OpenAlexW2001079770

What OpenQuestion holds

Textmetadata
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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.