Evidence map›Paper›PMID 19029441›Full record

ArticleBlood2009

Diffuse large B-cell lymphoma: reduced CD20 expression is associated with an inferior survival.

Nathalie A Johnson, Merrill Boyle, Ali Bashashati, Stephen Leach, Angela Brooks-Wilson, Laurie H Sehn, Mukesh Chhanabhai, Ryan R Brinkman, Joseph M Connors, Andrew P Weng and 1 more

Open access · greenAbstract read
In one paragraph

Article in Blood, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
73citing papers in PubMed, 1 pooled it
6.7field-weighted citation impact, top 3% 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

73 citing papers in PubMed, 1 synthesis or guideline pooled it, 159 citations in OpenAlex.

  1. Guideline
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  13. Observational
  14. Review
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13 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

11 authors at 4 institutions in 2 countries.

Nathalie A JohnsonDepartment of Pathology and Laboratory Medicine, British Columbia Cancer Agency, Vancouver, Canada.
Merrill Boyle
Ali Bashashati
Stephen Leach
Angela Brooks-Wilson
Laurie H Sehn
Mukesh Chhanabhai
Ryan R Brinkman
Joseph M Connors
Andrew P Weng
Randy D Gascoyne
BC Cancer Agency · CACanada's Michael Smith Genome Sciences Centre · CACancer Research Center · USTerry Fox Research Institute · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

CD19 and CD20 are B cell-specific antigens whose expression is heterogeneous when analyzed by flow cytometry (FCM). We determined the association between CD20 expression and clinical outcome in patients with diffuse large B-cell lymphoma (DLBCL). The mean fluorescence intensity of CD20 and CD19 was determined by FCM, and the cytoplasmic expression of CD20 was determined by immunohistochemistry (IHC) on 272 diagnostic DLBCL samples. Exon 5 of the MS4A1 gene coding for the extracellular component of the CD20 antigen was sequenced in 15 samples. A total of 43 of 272 (16%) samples had reduced CD20 expression by FCM; of these, 35 (13%) had bright CD19 expression. The latter had a markedly inferior survival when treated with cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) or rituximab-CHOP (R-CHOP; median survival of 1.2 and 3.0 years vs not reached for the others, P < .001 and P = .001), independent of the International Prognostic Index. A total of 41 of 43 samples with reduced CD20 expression by FCM had strong staining for CD20 by IHC. There were no mutations in exon 5 of the MS4A1 gene to explain the discrepancy between FCM and IHC. CD20 and CD19 expression by FCM should be determined on all biopsies of patients with DLBCL because reduced CD20 expression cannot be reliably detected by IHC.

Indexed as

Gene Expression Regulation, NeoplasticAgedAntibodies, MonoclonalAntibodies, Monoclonal, Murine-DerivedAntigens, CD19Antigens, CD20Antineoplastic Combined Chemotherapy ProtocolsCyclophosphamideDisease-Free SurvivalDoxorubicinFemaleFlow CytometryHumansLymphoma, Large B-Cell, DiffuseMaleMiddle AgedAntibodies, MonoclonalAntibodies, Monoclonal, Murine-DerivedAntigens, CD19Antigens, CD20CyclophosphamideDoxorubicinNeoplasm ProteinsPrednisoneRituximabVincristine

Identifiers

PMID19029441
PMCPMC2943836
OpenAlexW2067578715

What OpenQuestion holds

Textmetadata
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.