Evidence map›Paper›PMID 22297041›Full record

ArticleNeuroscience2012

Acute intermittent hypoxia-induced expression of brain-derived neurotrophic factor is disrupted in the brainstem of methyl-CpG-binding protein 2 null mice.

A Vermehren-Schmaedick, V K Jenkins, S J Knopp, A Balkowiec, J M Bissonnette

Open access · greenAbstract read
In one paragraph

Article in Neuroscience, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
1.2field-weighted citation impact, top 19% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

  1. Pooled it
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  5. Review
  6. Review
  7. Hypoxia Sensing and Responses in Parkinson's Disease.International journal of molecular sciences · 2024
    Review
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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.

A Vermehren-SchmaedickDepartment of Integrative Biosciences, Oregon Health and Science University, Portland, OR 97239, USA.
V K Jenkins
S J Knopp
A Balkowiec
J M Bissonnette
Oregon Health & Science University · US

Funding

Neurotrophins and Development of Baroreceptor Pathways.R01HL076113 · NHLBI · OREGON HEALTH & SCIENCE UNIVERSITY · PI BALKOWIEC, AGNIESZKA Z · 2005 to 2009
$1.5M
NHLBI NIH HHS HL076113NHLBI NIH HHS R01 HL076113
6 · The paper itself

Abstract

Rett syndrome is a neurodevelopmental disorder caused by loss-of-function mutations in the gene encoding the transcription factor methyl-CpG-binding protein 2 (MeCP2). One of its targets is the gene encoding brain-derived neurotrophic factor (bdnf). In vitro studies using cultured neurons have produced conflicting results with respect to the role of MeCP2 in BDNF expression. Acute intermittent hypoxia (AIH) induces plasticity in the respiratory system characterized by long-term facilitation of phrenic nerve amplitude. This paradigm induces an increase in BDNF protein. We hypothesized that AIH leads to augmentation of BDNF transcription in respiratory-related areas of the brainstem and that MeCP2 is necessary for this process. Wild-type and mecp2 null (mecp2(-/y)) mice were subjected to three 5-min episodes of exposure to 8% O(2)/4% CO(2)/88% N(2), delivered at 5-min intervals. Normoxia control wild-type and mecp2 null mice were exposed to room air for the total length of time, that is, 30 min. Following a recovery in room air, the pons and medulla were rapidly removed. Expression of BDNF protein and transcripts were determined by ELISA and quantitative PCR, respectively. AIH induced a significant increase in BDNF protein in the pons and medulla, and in mRNA transcript levels in the pons of wild-type animals. In contrast, there were no significant changes in either BDNF protein or transcripts in the pons or medulla of mice lacking MeCP2. The results indicate that MeCP2 is required for regulation of BDNF expression by acute intermittent hypoxia in vivo.

Indexed as

AnimalsBrain-Derived Neurotrophic FactorBrain StemEnzyme-Linked Immunosorbent AssayHypoxiaMethyl-CpG-Binding Protein 2MiceMice, KnockoutRett SyndromeReverse Transcriptase Polymerase Chain ReactionRNA, MessengerBrain-Derived Neurotrophic FactorMethyl-CpG-Binding Protein 2RNA, Messenger

Identifiers

PMID22297041
PMCPMC3293990
OpenAlexW2057299545

What OpenQuestion holds

Textmetadata
LicenceTDM
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.