Evidence map›Paper›PMID 26803847›Full record

ArticleToxicological sciences : an official journal of the Society of Toxicology2016

Nicotine Directly Induces Endoplasmic Reticulum Stress Response in Rat Placental Trophoblast Giant Cells.

Michael K Wong, Alison C Holloway, Daniel B Hardy

Open access · bronzeAbstract read
In one paragraph

Article in Toxicological sciences : an official journal of the Society of Toxicology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.2field-weighted citation impact, top 20% 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

16 citing papers in PubMed, 22 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

3 authors at 2 institutions in 1 country.

Michael K Wong*Department of Physiology and Pharmacology, Western University, London, Ontario, Canada N6A 5C1 daniel.hardy@schulich.uwo.ca.
Alison C HollowayDepartment of Obstetrics and Gynecology, McMaster University, Hamilton, Ontario, Canada L8S 4K1.
Daniel B Hardy*Department of Physiology and Pharmacology, Western University, London, Ontario, Canada N6A 5C1 Departments of Obstetrics and Gynecology, Children's Health Research Institute, Lawson, Health Research Institute, Western University, London, Ontario, Canada N6A 5C1 daniel.hardy@schulich.uwo.ca.
Western University · CAMcMaster University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Nicotine exposure during pregnancy leads to placental insufficiency impairing both fetal and neonatal development. Previous studies from our laboratory have demonstrated that in rats, nicotine augmented endoplasmic reticulum (ER) stress in association with placental insufficiency; however, the underlying mechanisms remain elusive. Therefore, we sought to investigate the possible direct effect of nicotine on ER stress in Rcho-1 rat placental trophoblast giant (TG) cells during differentiation. Protein and/or mRNA expression of markers involved in ER stress (eg, phosphorylated PERK, eIF2α, CHOP, and BiP/GRP78) and TG cell differentiation and function (eg, Pl-1, placental growth factor [Pgf], Hsd11b1, and Hsd11b2) were quantified via Western blot or real-time polymerase chain reaction. Nicotine treatment led to dose-dependent increases in the phosphorylation of PERK[Thr981] and eIF2α[Ser51], whereas pretreatment with a nicotinic acetylcholine receptor (nAChR) antagonist (mecamylamine hydrochloride) blocked the induction of PERK phosphorylation, verifying the direct involvement of nicotine and nAChR binding. We next investigated select target genes known to play essential roles in placental TG cell differentiation and function (Pl-1, Pgf, Hsd11b1, and Hsd11b2), and found that nicotine significantly augmented the mRNA levels of Hsd11b1 in a dose-dependent manner. Furthermore, using tauroursodeoxycholic acid, a safe bile acid known to improve protein chaperoning and folding, we were able to prevent nicotine-induced increases in both PERK phosphorylation and Hsd11b1 mRNA levels, revealing a potential novel therapeutic approach to reverse the deleterious effects of nicotine exposure in pregnancy. Collectively, these results implicate that nicotine, acting through its receptor, can directly augment ER stress and impair placental function.

Indexed as

11-beta-Hydroxysteroid Dehydrogenase Type 1AnimalsCell LineDose-Response Relationship, DrugeIF-2 KinaseEndoplasmic Reticulum StressFemaleGene Expression RegulationGiant CellsMecamylamineNicotineNicotinic AgonistsNicotinic AntagonistsPhosphorylationRatsReceptors, Nicotinic11-beta-Hydroxysteroid Dehydrogenase Type 1eIF-2 KinaseMecamylamineNicotineNicotinic AgonistsNicotinic AntagonistsReceptors, NicotinicRNA, MessengerTaurochenodeoxycholic Acidursodoxicoltaurineendoplasmic reticulum stressnicotineplacentaRcho-1tauroursodeoxycholic acidtrophoblast giant cell.

Identifiers

PMID26803847
PMCPMC4914791
OpenAlexW2317023143

What OpenQuestion holds

Textmetadata
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.