Evidence map›Paper›PMID 20733009›Full record

ArticleCardiovascular research2011

Foetal nicotine exposure causes PKCε gene repression by promoter methylation in rat hearts.

Jennifer Lawrence, Man Chen, Fuxia Xiong, Daliao Xiao, Haitao Zhang, John N Buchholz, Lubo Zhang

Open access · bronzeAbstract read
In one paragraph

Article in Cardiovascular research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 1 pooled it
8.5field-weighted citation impact, top 3% 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

44 citing papers in PubMed, 1 synthesis or guideline pooled it, 56 citations in OpenAlex.

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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

7 authors at 1 institution in 1 country.

Jennifer LawrenceDepartment of Physiology and Pharmacology, Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA.
Man Chen
Fuxia Xiong
Daliao Xiao
Haitao Zhang
John N Buchholz
Lubo Zhang
Loma Linda University · US

Funding

Hypoxia and Aberrant Uterine Vascular Adaptation in PregnancyR01HL110125 · NHLBI · LOMA LINDA UNIVERSITY · PI ZHANG, LUBO · 2011 to 2015
$1.8M
Maternal Hypoxia and Programming of Fetal HeartR01HL083966 · NHLBI · LOMA LINDA UNIVERSITY · PI ZHANG, LUBO · 2007 to 2011
$1.8M
Steroid Hormones and Uterine Vascular Adaptation to PregnancyR01HL089012 · NHLBI · LOMA LINDA UNIVERSITY · PI ZHANG, LUBO · 2008 to 2012
$1.8M
Prenatal Cocaine Exposure and Cardiac ProgrammingR01HL082779 · NHLBI · LOMA LINDA UNIVERSITY · PI ZHANG, LUBO · 2006 to 2009
$1.6M
NHLBI NIH HHS HL82779NHLBI NIH HHS HL83966NHLBI NIH HHS R01 HL082779NHLBI NIH HHS R01 HL083966NHLBI NIH HHS R01 HL089012NHLBI NIH HHS R01 HL110125
6 · The paper itself

Abstract

aimsfoetal nicotine exposure results in decreased protein kinase C epsilon (PKCε) expression and increased cardiac vulnerability to ischaemia and reperfusion injury in adult rat offspring. The present study tested the hypothesis that maternal nicotine administration causes increased promoter methylation of the PKCε gene resulting in PKCε repression in the heart. METHODS AND

resultsnicotine treatment of pregnant rats starting at day 4 of gestation increased the methylation of the Egr-1 binding site at the PKCε gene promoter and decreased PKCε protein and mRNA abundance in near-term foetal hearts. Methylation of the Egr-1 binding site reduced Egr-1 binding to the PKCε promoter in the heart. Site-specific deletion of the Egr-1 binding site significantly decreased PKCε promoter activity. The effects of nicotine were sustained in the heart of adult offspring. Ex vivo studies found no direct effect of nicotine on PKCε gene expression. However, maternal nicotine administration increased norepinephrine content in the foetal heart. Treatment of isolated foetal hearts with norepinephrine resulted in the same effects of increased methylation of the Egr-1 binding site and PKCε gene repression in the heart. 5-Aza-2'-deoxycytidine inhibited the norepinephrine-induced increase in methylation of the Egr-1 binding site and restored Egr-1 binding and PKCε gene expression to the control levels.

conclusionthis study demonstrates that prolonged nicotine exposure increases the sympathetic neurotransmitter release in the foetal heart and causes programming of PKCε gene repression through promoter methylation, linking maternal smoking to pathophysiological consequences in the offspring heart.

Indexed as

AnimalsBase SequenceBinding SitesCell LineDNA MethylationDNA PrimersEarly Growth Response Protein 1FemaleGene ExpressionHeartIn Vitro TechniquesMyocardiumNicotineNorepinephrinePregnancyPrenatal Exposure Delayed EffectsDNA PrimersEarly Growth Response Protein 1Egr1 protein, ratNicotineNorepinephrineProtein Kinase C-epsilonRNA, Messenger

Identifiers

PMID20733009
PMCPMC3002869
OpenAlexW2100596096

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Registered trials

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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.