Evidence map›Paper›PMID 26571493›Full record

ArticlePloS one2015

Vorinostat Enhances Cytotoxicity of SN-38 and Temozolomide in Ewing Sarcoma Cells and Activates STAT3/AKT/MAPK Pathways.

Valerie B Sampson, Nancy S Vetter, Davida F Kamara, Anderson B Collier, Renee C Gresh, E Anders Kolb

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
2.0field-weighted citation impact, top 14% 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

24 citing papers in PubMed, 42 citations in OpenAlex.

  1. Trial
  2. Targeted and molecular therapies in Ewing sarcoma: a comprehensive review of preclinical and clinical advances.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2026
    Review
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  12. Review
  13. Precision medicine in Ewing sarcoma: a translational point of view.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2020
    Review
  14. 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

6 authors at 2 institutions in 1 country.

Valerie B SampsonNemours Center for Cancer and Blood Disorders, Nemours/A.I. duPont Hospital for Children, Wilmington, Delaware, United States of America.
Nancy S VetterNemours Center for Cancer and Blood Disorders, Nemours/A.I. duPont Hospital for Children, Wilmington, Delaware, United States of America.
Davida F KamaraNemours Center for Cancer and Blood Disorders, Nemours/A.I. duPont Hospital for Children, Wilmington, Delaware, United States of America.
Anderson B CollierDepartment of Pediatrics, Division of Hematology and Oncology, Children's Healthcare of Mississippi, University of Mississippi Medical Center, Jackson, MS, United States of America.
Renee C GreshNemours Center for Cancer and Blood Disorders, Nemours/A.I. duPont Hospital for Children, Wilmington, Delaware, United States of America.
E Anders KolbNemours Center for Cancer and Blood Disorders, Nemours/A.I. duPont Hospital for Children, Wilmington, Delaware, United States of America.
Center for Cancer and Blood Disorders · USUniversity of Mississippi Medical Center · US

Funding

Center for Pediatric ResearchP20GM103464 · NIGMS · NEMOURS CHILDREN'S HOSPITAL, DELAWARE · PI SHAFFER, THOMAS H · 2012 to 2014
$5.6M
Center for Pediatric Research Pilot ProgramP30GM114736 · NIGMS · NEMOURS CHILDREN'S HOSPITAL, DELAWARE · PI SHAFFER, THOMAS H · 2015 to 2019
$5.1M
NIGMS NIH HHS P20 GM103464NIGMS NIH HHS P20GM103464NIGMS NIH HHS P30 GM114736NIGMS NIH HHS P30GM114736
6 · The paper itself

Abstract

Histone deacetylase inhibitors (HDACi) have been evaluated in patients with Ewing sarcoma (EWS) but demonstrated limited activity. To better understand the potential for HDACi in EWS, we evaluated the combination of the HDACi vorinostat, with DNA damaging agents SN-38 (the active metabolite of irinotecan and topoisomerase 1 inhibitor) plus the alkylating agent temozolomide (ST). Drugs were evaluated in sequential and simultaneous combinations in two EWS cell lines. Results demonstrate that cell viability, DNA damage and reactive oxygen species (ROS) production are dependent on the sequence of drug administration. Enhanced cytotoxicity is exhibited in vitro in EWS cell lines treated with ST administered before vorinostat, which was modestly higher than concomitant treatment and superior to vorinostat administered before ST. Drug combinations downregulate cyclin D1 to induce G0/G1 arrest and promote apoptosis by cleavage of caspase-3 and PARP. When ST is administered before or concomitantly with vorinostat there is activation of STAT3, MAPK and the p53 pathway. In contrast, when vorinostat is administered before ST, there is DNA repair, increased AKT phosphorylation and reduced H2B acetylation. Inhibition of AKT using the small molecule inhibitor MK-2206 did not restore H2B acetylation. Combining ST with the dual ALK and IGF-1R inhibitor, AZD3463 simultaneously inhibited STAT3 and AKT to enhance the cytotoxic effects of ST and further reduce cell growth suggesting that STAT3 and AKT activation were in part mediated by ALK and IGF-1R signaling. In summary, potent antiproliferative and proapoptotic activity were demonstrated for ST induced DNA damage before or simultaneous with HDAC inhibition and cell death was mediated through the p53 pathway. These observations may aid in designing new protocols for treating pediatric patients with high-risk EWS.

Indexed as

AcetylationAntineoplastic AgentsApoptosisCamptothecinCaspase 3Cell Line, TumorCell ProliferationCell SurvivalDacarbazineDNA DamageG1 Phase Cell Cycle CheckpointsHeterocyclic Compounds, 3-RingHistone Deacetylase InhibitorsHumansHydroxamic AcidsIrinotecanAntineoplastic AgentsCamptothecinCaspase 3DacarbazineHeterocyclic Compounds, 3-RingHistone Deacetylase InhibitorsHydroxamic AcidsIrinotecanMitogen-Activated Protein KinasesMK 2206Proto-Oncogene Proteins c-aktReactive Oxygen SpeciesSTAT3 Transcription FactorTemozolomideTumor Suppressor Protein p53Vorinostat

Identifiers

PMID26571493
PMCPMC4646493
OpenAlexW2172592582

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.