Evidence map›Paper›PMID 20682464›Full record

ArticleGene2010

Multiple retinoic acid response elements cooperate to enhance the inducibility of CYP26A1 gene expression in liver.

Yao Zhang, Reza Zolfaghari, A Catharine Ross

Abstract read
In one paragraph

Article in Gene, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
2.4field-weighted citation impact, top 12% 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

37 citing papers in PubMed, 54 citations in OpenAlex.

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  14. Undifferentiated spermatogonia regulateFASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2019
    Article
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  20. Input overload: Contributions of retinoic acid signaling feedback mechanisms to heart development and teratogenesis.Developmental dynamics : an official publication of the American Association of Anatomists · 2015
    Review
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 1 institution in 1 country.

Yao ZhangDepartment of Nutritional Sciences, The Pennsylvania State University, University Park, PA 16802, USA. Yxz152@psu.edu
Reza Zolfaghari
A Catharine Ross
Pennsylvania State University · US

Funding

Molecular Regulation of LRAT and CYP26 in Lung and LiverR01CA090214 · NCI · PENNSYLVANIA STATE UNIVERSITY-UNIV PARK · PI ROSS, A. CATHARINE · 2001 to 2012
$2.6M
NCI NIH HHS R01 CA090214NCI NIH HHS R01 CA-90214
6 · The paper itself

Abstract

CYP26A1, which catalyzes the oxidation of all-trans (at)-retinoic acid (RA), is induced moderately by RA in numerous tissues, but is highly responsive in liver. To understand this difference, we have examined the CYP26A1 gene sequence, identified multiple RA response elements (RAREs) and tested them functionally in HepG2 cells as model hepatocytes, and in the liver of vitamin A (VA)-adequate and -deficient rats. Analysis of a 2.2 kbp 5'-flanking region upstream of the CYP26A1 transcription start site (TSS) identified 3 conserved hexameric direct repeat-5 elements, RARE1, -2 and -3, and a half site, RARE4. The full-length promoter containing all 4 elements was sufficient and necessary to increase promoter activity similar to levels of endogenous CYP26A1 mRNA produced in HepG2 cells treated with at-RA. In DNA binding and chromatin immunoprecipitation assays, the binding of RARs to the proximal RARE1 and distal RARE2, -3, and -4 regions of the CYP26A1 promoter was increased in RA-treated HepG2 cells, and greater in VA-sufficient than VA-deficient liver. Moreover, RA increased the binding of RNA polymerase-II in the distal as well as the proximal region, indicating that the distal region may be looped to become positioned close to the TSS, a process favored by retinoic acid receptors. The results support a cooperative model in which the functioning of multiple RAREs may account for the strong inducibility of CYP26A1 in liver, which, in turn, may be important physiologically for restoring retinoid homeostasis when the concentration of RA rises.

Indexed as

AnimalsBase SequenceCell LineChromatinConserved SequenceCytochrome P-450 Enzyme SystemEnzyme InductionHep G2 CellsHumansKidneyLiverMaleProtein BindingRatsRats, Sprague-DawleyReceptors, Retinoic AcidChromatinCytochrome P-450 Enzyme SystemReceptors, Retinoic AcidRetinoic Acid 4-HydroxylaseRNA Polymerase IITretinoin

Identifiers

PMID20682464
PMCPMC2916872
OpenAlexW1967222733

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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.