Evidence map›Paper›PMID 26817645›Full record

ArticleTargeted oncology2016

Preclinical Study of a Combination of Erlotinib and Bevacizumab in Early Stages of Unselected Non-Small Cell Lung Cancer Patient-Derived Xenografts.

J Rolff, M Becker, J Merk, J Hoffmann, I Fichtner

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Article in Targeted oncology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

6 citing papers in PubMed, 11 citations in OpenAlex.

  1. Trial
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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 1 institution in 1 country.

J RolffExperimental Pharmacology & Oncology Berlin-Buch GmbH, Robert-Roessle-Str. 10, 13125, Berlin-Buch, Germany. j.rolff@epo-berlin.com.
M BeckerExperimental Pharmacology & Oncology Berlin-Buch GmbH, Robert-Roessle-Str. 10, 13125, Berlin-Buch, Germany.
J MerkLabor Dr. Merk & Kollegen GmbH, Beim Braunland 1, 88416, Ochsenhausen, Germany.
J HoffmannExperimental Pharmacology & Oncology Berlin-Buch GmbH, Robert-Roessle-Str. 10, 13125, Berlin-Buch, Germany.
I FichtnerExperimental Pharmacology & Oncology Berlin-Buch GmbH, Robert-Roessle-Str. 10, 13125, Berlin-Buch, Germany.
Helios Hospital Berlin-Buch · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe differential outcomes of clinical studies of the targeted therapies for non-small cell lung cancer (NSCLC) indicate that better stratification of patients is required. This could be achieved with the help of patient-derived xenografts (PDX) of epidermal growth factor receptor (EGFR) wild-type patients resistant to erlotinib treatment.

objectiveTo explore the potential of patient-derived NSCLC xenografts to optimize therapy using 24 well-characterized early-stage NSCLC PDX.

methodPatient tumor tissue was transplanted subcutaneously into nude mice. After engraftment, tumors were expanded and the sensitivity was tested. Gene expression analysis was used to identify differentially expressed genes between erlotinib responder (n = 3) and non-responder (n = 21). Tumor tissue was analyzed with TaqMan PCR, immunohistochemistry and ELISA to examine the response of the models.

resultsGene expression analysis revealed vascular endothelial growth factor A (VEGFA) to be up-regulated in erlotinib non-responder. Because of that, the combination of erlotinib with bevacizumab was evaluated in one erlotinib-sensitive and four erlotinib-resistant PDX. Combination treatment was superior to monotherapy, leading to the highest and significant inhibition of tumor growth in all models investigated. A decline of VEGFA protein and an increase of VEGFA-mRNA were observed after bevacizumab treatment. Bevacizumab treatment resulted in a distinct decrease of blood vessel number.

conclusionThis study showed that with the help of preclinical PDX models, drug combinations for therapy improvement can be identified on a rational basis. It was observed that a dual blockage of EGFR and VEGFA was more effective than a monotherapy for the treatment of NSCLC in selected PDX models. PDX could be employed to optimize the treatment of cancer patients.

Indexed as

Angiogenesis InhibitorsAnimalsBevacizumabCarcinoma, Non-Small-Cell LungErlotinib HydrochlorideGene ExpressionHumansLung NeoplasmsMiceMice, NudeNeoplasm StagingXenograft Model Antitumor AssaysAngiogenesis InhibitorsBevacizumabErlotinib Hydrochloride

Identifiers

PMID26817645
OpenAlexW2297886689

What OpenQuestion holds

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Registered trials

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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.