Evidence map›Paper›PMID 15788405›Full record

ArticleThe Journal of biological chemistry2005

Collagen alpha1(I) gene (COL1A1) is repressed by RFX family.

Pritam Sengupta, Yong Xu, Lin Wang, Russell Widom, Barbara D Smith

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
1.6field-weighted citation impact, top 18% 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

36 citing papers in PubMed, 62 citations in OpenAlex.

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  11. Biotechnology reports (Amsterdam, Netherlands) · 2019
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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 2 institutions in 1 country.

Pritam SenguptaDepartment of Biochemistry, Boston University School of Medicine, Boston, Massachusetts 02118, USA.
Yong Xu
Lin Wang
Russell Widom
Barbara D Smith
Boston University · USVA Boston Healthcare System · US

Funding

TISSUE CULTURE FACILITY (MAMMALS) --COREP01HL013262 · NHLBI · BOSTON UNIVERSITY MEDICAL CAMPUS · PI SMITH, BARBARA A · 1985 to 2007
$12.5M
Collagen Transcription and Lung FibrosisR01HL068094 · NHLBI · BOSTON UNIVERSITY MEDICAL CAMPUS · PI SMITH, BARBARA DAVIS · 2001 to 2009
$3.3M
NHLBI NIH HHS P01 HL013262NHLBI NIH HHS R01 HL068094
6 · The paper itself

Abstract

Collagen type I is composed of three polypeptide chains transcribed from two separate genes (COL1A1 and COL1A2) with different promoters requiring coordinate regulation. Our recent publications, centering on COL1A2 regulation, demonstrate that methylation in the first exon of COL1A2 at a regulatory factor for X box (RFX) site (at -1 to +20) occurs in human cancer cells and correlates with increased RFX1 binding and decreased collagen transcription (Sengupta, P. K., Erhlich, M., and Smith, B. D. (1999) J. Biol. Chem. 274, 36649-36655; Sengupta, S., Smith, E. M., Kim, K., Murnane, M. J., and Smith, B. D. (2003) Cancer Res. 63, 1789-1797). In normal cells, RFX5 complex along with major histocompatibility class II transactivator (CIITA) is induced by interferon-gamma to occupy this site and repress collagen transcription (Xu, Y., Wang, L., Buttice, G., Sengupta, P. K., and Smith, B. D. (2004) J. Biol. Chem. 279, 41319-41332). In this paper, we demonstrate that COL1A1 has an RFX consensus binding site surrounding the transcription start site (-11 to +10) that contains three methylation sites rather than one in the COL1A2 gene RFX binding site. RFX1 interacts weakly with the unmethylated COL1A1 site, and binds with higher affinity to the methylated site. RFX1 represses the unmethylated COL1A1 less efficiently than COL1A2. COL1A1 promoter activity is sensitive to DNA methylation and the COL1A1 gene is methylated in human cancer cells with coordinately decreased collagen expression. The DNA methylation inhibitor, 5-aza-2'-deoxycytidine (aza-dC) increases collagen gene expression with time in human cancer cells. On the other hand, RFX5 interacts with both collagen type I genes with a similar binding affinity and represses both promoters equally in transient transfections. Two dominant negative forms of RFX5 activate both collagen genes coordinately. Finally, CIITA RNA interference experiments indicate that CIITA induction is required for interferon gamma-mediated repression of both collagen type I genes.

Indexed as

AnimalsAzacitidineBase SequenceBinding SitesBlotting, WesternCell Line, TumorCell NucleusCollagenCollagen Type ICollagen Type I, alpha 1 ChainDNA-Binding ProteinsDNA MethylationDose-Response Relationship, DrugExonsFibrosarcomaGenes, DominantAzacitidineCollagenCollagen Type ICollagen Type I, alpha 1 ChainDNA-Binding ProteinsInterferon-gammaMHC class II transactivator proteinNuclear ProteinsPeptidesRegulatory Factor X1Regulatory Factor X Transcription FactorsRFX1 protein, humanRfx1 protein, ratRFX5 protein, humanSulfitesTrans-ActivatorsTranscription Factors

Identifiers

PMID15788405
PMCPMC1382295
OpenAlexW2046762506

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.