Evidence map›Paper›PMID 34692726›Full record

ArticleFrontiers in medicine2021

Delta-Like Protein 3 Expression in Paired Chemonaive and Chemorelapsed Small Cell Lung Cancer Samples.

Christiane Kuempers, Tobias Jagomast, Rosemarie Krupar, Finn-Ole Paulsen, Carsten Heidel, Julika Ribbat-Idel, Christian Idel, Bruno Märkl, Martin Anlauf, Sabina Berezowska and 9 more

Open access · goldAbstract read
In one paragraph

Article in Frontiers in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.1field-weighted citation impact, top 19% 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

16 citing papers in PubMed, 23 citations in OpenAlex.

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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

19 authors at 7 institutions in 2 countries.

Christiane KuempersInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Tobias JagomastInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Rosemarie KruparPathology, Research Center Borstel-Leibniz Lung Center, Borstel, Germany.
Finn-Ole PaulsenInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Carsten HeidelInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Julika Ribbat-IdelInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Christian IdelDepartment of Otorhinolaryngology, Luebeck, University of Luebeck and University Hospital Schleswig-Holstein, Luebeck, Germany.
Bruno MärklMedical Faculty, General Pathology and Molecular Diagnostics, University Augsburg, Augsburg, Germany.
Martin AnlaufInstitute of Pathology, Cytology and Molecular Pathology Limburg, Limburg, Germany.
Sabina BerezowskaDepartment of Laboratory Medicine and Pathology, Institute of Pathology, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland.
Markus TiemannInstitute for Hematopathology, Hamburg, Germany.
Hans BösmüllerInstitute of Pathology and Neuropathology University Hospital Tuebingen, Tuebingen, Germany.
Falko FendInstitute of Pathology and Neuropathology University Hospital Tuebingen, Tuebingen, Germany.
Barbara KalsdorfMedical Clinic, Research Center Borstel-Leibniz Lung Center, Borstel, Germany.
Sabine BohnetDepartment of Pulmonology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Eva DreyerInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Verena SailerInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Jutta KirfelInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
Sven PernerInstitute of Pathology, Luebeck, University Hospital Schleswig-Holstein, Luebeck, Germany.
University of Lübeck · DEUniversity Hospital Schleswig-Holstein · DEResearch Center Borstel - Leibniz Lung Center · DEInstitut für Hämatopathologie Hamburg · DEUniversität Hamburg · DEUniversity of Augsburg · DEUniversity of Lausanne · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Rovalpituzumab tesirine (Rova-T), an antibody-drug conjugate directed against Delta-like protein 3 (DLL3), is under development for patients with small cell lung cancer (SCLC). DLL3 is expressed on the majority of SCLC samples. Because SCLC is rarely biopsied in the course of disease, data regarding DLL3 expression in relapses is not available. The aim of this study was to investigate the expression of DLL3 in chemorelapsed (but untreated with Rova-T) SCLC samples and compare the results with chemonaive counterparts. Two evaluation methods to assess DLL3 expression were explored. Additionally, we assessed if DLL3 expression of chemorelapsed and/or chemonaive samples has prognostic impact and if it correlates with other clinicopathological data. The study included 30 paired SCLC samples, which were stained with an anti DLL3 antibody. DLL3 expression was assessed using tumor proportion score (TPS) and H-score and was categorized as DLL3 low (TPS < 50%, H-score ≤ 150) and DLL3 high (TPS ≥ 50%, H-score > 150). Expression data were correlated with clinicopathological characteristics. Kaplan-Meier curves were used to illustrate overall survival (OS) depending on DLL3 expression in chemonaive and chemorelapsed samples, respectively, and depending on dynamics of expression during course of therapy. DLL3 was expressed in 86.6% chemonaive and 80% chemorelapsed SCLC samples without significant differences between the two groups. However, the extent of expression varied in a substantial proportion of pairs (36.6% with TPS, 43.3% with H-score), defined as a shift from low to high or high to low expression. TPS and H-score provided comparable results. There were no profound correlations with clinicopathological data. Survival analysis revealed a trend toward a more favorable OS in DLL low-expressing chemonaive SCLC (

Indexed as

chemonaivechemorelapseddelta-like protein 3pairedsmall cell lung cancer

Identifiers

PMID34692726
PMCPMC8531433
OpenAlexW3206709681

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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.