Evidence map›Paper›PMID 19826413›Full record

ArticleOncogene2009

TLR4 signaling induced by lipopolysaccharide or paclitaxel regulates tumor survival and chemoresistance in ovarian cancer.

M Szajnik, M J Szczepanski, M Czystowska, E Elishaev, M Mandapathil, E Nowak-Markwitz, M Spaczynski, T L Whiteside

Open access · greenAbstract read
In one paragraph

Article in Oncogene, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 129 papers.

0numbers the graph read from it
0cells of the map it votes in
129citing papers in PubMed
4.2field-weighted citation impact, top 5% 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

129 citing papers in PubMed, 227 citations in OpenAlex.

  1. Review
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  7. Cancers · 2025
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69 more citing papers are in PubMed but not listed here.

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 3 institutions in 2 countries.

M SzajnikUniversity of Pittsburgh Cancer Institute, Pittsburgh, PA, USA.
M J Szczepanski
M Czystowska
E Elishaev
M Mandapathil
E Nowak-Markwitz
M Spaczynski
T L Whiteside
UPMC Hillman Cancer Center · USPoznan University of Medical Sciences · PLUniversity of Pittsburgh · US

Funding

Tissue Procurement / ImmunohistologyP01CA109688 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI SCHLESSELMAN, JAMES J · 2006 to 2010
$5.9M
NCI NIH HHS P01 CA109688NHLBI NIH HHS N01 HB037165
6 · The paper itself

Abstract

Toll-like receptors (TLRs) expressed on immune cells trigger inflammatory responses. TLRs are also expressed on ovarian cancer (OvCa) cells, but the consequences of signaling by the TLR4/MyD88 pathway in these cells are unclear. Here, TLR4 and MyD88 expression in OvCa tissues (n=20) and cell lines (OVCAR3, SKOV3, AD10, A2780 and CP70) was evaluated by reverse transcriptase-PCR, western blots and immunohistochemistry. Cell growth, apoptosis, nuclear factor-kappaB (NF-kappaB) translocation, IRAK4 and TRIF expression and cJun phosphorylation were measured following tumor cell exposure to the TLR4 ligands, lipopolysaccharide (LPS) or paclitaxel (PTX). Culture supernatants were tested for cytokine levels. TLR4 was expressed in all tumors, tumor cell lines and normal epithelium. MyD88 was detectable in tumor tissues and in 3/5 OvCa lines but not in normal cells. In MyD88(+) SCOV3 cells, LPS or PTX binding to TLR4 induced IRAK4 activation and cJun phosphorylation, activated the NF-kappaB pathway and promoted interleukin (IL)-8, IL-6, vascular endothelial growth factor and monocyte chemotactic protein-1 production and resistance to drug-induced apoptosis. Silencing of TLR4 in SCOV3 cells with small interference RNA resulted in phosphorylated-cJun (p-cJun) downregulation and a loss of PTX resistance. In PTX-sensitive, MyD88(neg) A2780 cells, TLR4 stimulation upregulated TRIF, and TLR4 silencing eliminated this effect. Thus, TLR4/MyD88 signaling supports OvCa progression and chemoresistance, promoting immune escape.

Indexed as

CarcinomaCell ProliferationCell SurvivalCytokinesDrug Resistance, NeoplasmFemaleGene Expression Regulation, NeoplasticHumansLipopolysaccharidesMyeloid Differentiation Factor 88NF-kappa BOvarian NeoplasmsPaclitaxelSignal TransductionToll-Like Receptor 4Tumor Cells, CulturedCytokinesLipopolysaccharidesMYD88 protein, humanMyeloid Differentiation Factor 88NF-kappa BPaclitaxelTLR4 protein, humanToll-Like Receptor 4

Identifiers

PMID19826413
PMCPMC2794996
OpenAlexW2048214675

What OpenQuestion holds

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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.