Evidence map›Paper›PMID 16043492›Full record

ArticleGut2006

Vitamin A inhibits pancreatic stellate cell activation: implications for treatment of pancreatic fibrosis.

J A McCarroll, P A Phillips, N Santucci, R C Pirola, J S Wilson, M V Apte

Open access · bronzeAbstract read
In one paragraph

Article in Gut, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
5.4field-weighted citation impact, top 4% 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

81 citing papers in PubMed, 144 citations in OpenAlex.

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21 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

J A McCarrollPancreatic Research Group, Room 463, Level 4, Health Services Building, Liverpool Hospital, Campbell Street, Liverpool, NSW 2170, Australia.
P A Phillips
N Santucci
R C Pirola
J S Wilson
M V Apte
Liverpool Hospital · AUUNSW Sydney · AU

Funding

Wellcome Trust
6 · The paper itself

Abstract

BACKGROUND AND

aimsActivated pancreatic stellate cells (PSCs) are implicated in the production of alcohol induced pancreatic fibrosis. PSC activation is invariably associated with loss of cytoplasmic vitamin A (retinol) stores. Furthermore, retinol and ethanol are known to be metabolised by similar pathways. Our group and others have demonstrated that ethanol induced PSC activation is mediated by the mitogen activated protein kinase (MAPK) pathway but the specific role of retinol and its metabolites all-trans retinoic acid (ATRA) and 9-cis retinoic acid (9-RA) in PSC quiescence/activation, or its influence on ethanol induced PSC activation is not known. Therefore, the aims of this study were to (i) examine the effects of retinol, ATRA, and 9-RA on PSC activation; (ii) determine whether retinol, ATRA, and 9-RA influence MAPK signalling in PSCs; and (iii) assess the effect of retinol supplementation on PSCs activated by ethanol.

methodsCultured rat PSCs were incubated with retinol, ATRA, or 9-RA for varying time periods and assessed for: (i) proliferation; (ii) expression of alpha smooth muscle actin (alpha-SMA), collagen I, fibronectin, and laminin; and (iii) activation of MAPKs (extracellular regulated kinases 1 and 2, p38 kinase, and c-Jun N terminal kinase). The effect of retinol on PSCs treated with ethanol was also examined by incubating cells with ethanol in the presence or absence of retinol for five days, followed by assessment of alpha-SMA, collagen I, fibronectin, and laminin expression.

resultsRetinol, ATRA, and 9-RA significantly inhibited: (i) cell proliferation, (ii) expression of alpha-SMA, collagen I, fibronectin, and laminin, and (iii) activation of all three classes of MAPKs. Furthermore, retinol prevented ethanol induced PSC activation, as indicated by inhibition of the ethanol induced increase in alpha-SMA, collagen I, fibronectin, and laminin expression.

conclusionsRetinol and its metabolites ATRA and 9-RA induce quiescence in culture activated PSCs associated with a significant decrease in the activation of all three classes of MAPKs in PSCs. Ethanol induced PSC activation is prevented by retinol supplementation.

Indexed as

AlitretinoinAnimalsCell Cycle ProteinsCell ProliferationCells, CulturedDual Specificity Phosphatase 1Enzyme ActivationEnzyme InhibitorsEthanolExtracellular Matrix ProteinsFibrosisImmediate-Early ProteinsMitogen-Activated Protein KinasesPancreasPhosphoprotein PhosphatasesProtein Phosphatase 1AlitretinoinCell Cycle ProteinsDual Specificity Phosphatase 1Dusp1 protein, ratEnzyme InhibitorsEthanolExtracellular Matrix ProteinsImmediate-Early ProteinsMitogen-Activated Protein KinasesPhosphoprotein PhosphatasesProtein Phosphatase 1Protein Tyrosine PhosphatasesReceptors, Retinoic AcidRetinoid X ReceptorsTretinoinVanadatesVitamin A

Identifiers

PMID16043492
PMCPMC1856372
OpenAlexW1998544155

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.