Evidence map›Paper›PMID 18632617›Full record

ArticleCancer research2008

SerpinB2 protection of retinoblastoma protein from calpain enhances tumor cell survival.

Laura Tonnetti, Sarah Netzel-Arnett, Grant A Darnell, Tamara Hayes, Marguerite S Buzza, Ian E Anglin, Andreas Suhrbier, Toni M Antalis

Open access · bronzeAbstract read
In one paragraph

Article in Cancer research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
2.8field-weighted citation impact, top 10% 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

38 citing papers in PubMed, 77 citations in OpenAlex.

  1. Article
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  7. ACYP2 contributes to malignant progression of glioma through promoting CaJournal of experimental & clinical cancer research : CR · 2020
    Article
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  12. Dual-specificity MAP kinase phosphatases in health and disease.Biochimica et biophysica acta. Molecular cell research · 2019
    Review
  13. Article
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  15. Article
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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

8 authors at 2 institutions in 2 countries.

Laura TonnettiCenter for Vascular and Inflammatory Diseases, Department of Physiology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA.
Sarah Netzel-Arnett
Grant A Darnell
Tamara Hayes
Marguerite S Buzza
Ian E Anglin
Andreas Suhrbier
Toni M Antalis
University of Maryland, Baltimore · USQIMR Berghofer Medical Research Institute · AU

Funding

UNIVERSITY OF MARYLAND GREENEBAUM CANCER CENTERSUPPORT GRANTP30CA134274 · NCI · UNIVERSITY OF MARYLAND BALTIMORE · PI FEYRUZ VIRGILIA RASSOOL · 2008 to 2026
$51.0M
New Function for the Serpin PAI-2 as a Regulator of pRbR01CA098369 · NCI · UNIVERSITY OF MARYLAND BALTIMORE · PI ANTALIS, TONI M. · 2003 to 2007
$1.5M
NCI NIH HHS P30 CA134274NCI NIH HHS R01 CA098369
6 · The paper itself

Abstract

The tumor suppressor retinoblastoma protein (Rb) plays a pivotal role in the regulation of cell proliferation and sensitivity to apoptosis through binding to E2F transcription factors. Loss of Rb in response to genotoxic stress or inflammatory cytokines can enhance cell death, in part, by eliminating Rb-mediated repression of proapoptotic gene transcription. Here we show that calpain cleavage of Rb facilitates Rb loss by proteasome degradation and that this may occur during tumor necrosis factor alpha-induced apoptosis. The cytoprotective, Rb-binding protein SerpinB2 (plasminogen activator inhibitor type 2) protects Rb from calpain cleavage, increasing Rb levels and enhancing cell survival. Chromatin immunoprecipitation assays show that the increased Rb levels selectively enhance Rb repression of proapoptotic gene transcription. This cytoprotective role of SerpinB2 is illustrated by reduced susceptibility of SerpinB2-deficient mice to multistage skin carcinogenesis, where Rb-dependent cell proliferation competes with apoptosis during initiation of papilloma development. These data identify SerpinB2 as a cell survival factor that modulates Rb repression of proapoptotic signal transduction and define a new posttranslational mechanism for selective regulation of the intracellular levels of Rb.

Indexed as

Cell SurvivalGene Expression Regulation, NeoplasticAnimalsApoptosisCalpainFibroblastsGenetic Predisposition to DiseaseHeLa CellsHumansJurkat CellsMicePlasminogen Activator Inhibitor 2Retinoblastoma ProteinSignal TransductionSkin NeoplasmsCalpainPlasminogen Activator Inhibitor 2Retinoblastoma Protein

Identifiers

PMID18632617
PMCPMC2561898
OpenAlexW2051614055

What OpenQuestion holds

Textmetadata
LicenceTDM
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.