Evidence map›Paper›PMID 19211644›Full record

ArticleHaematologica2009

CD20 mutations involving the rituximab epitope are rare in diffuse large B-cell lymphomas and are not a significant cause of R-CHOP failure.

Nathalie A Johnson, Stephen Leach, Bruce Woolcock, Ronald J deLeeuw, Ali Bashashati, Laurie H Sehn, Joseph M Connors, Mukesh Chhanabhai, Angela Brooks-Wilson, Randy D Gascoyne

Open access · goldAbstract read
In one paragraph

Article in Haematologica, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
3.5field-weighted citation impact, top 8% 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

31 citing papers in PubMed, 68 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Article
  4. Article
  5. Targeting CD20 for B-cell Depletion in Autoimmune Kidney Disease: Next Generation.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2025
    Review
  6. Review
  7. Review
  8. Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Review
  17. Article
  18. Article
  19. Review
  20. Article
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

10 authors at 3 institutions in 2 countries.

Nathalie A JohnsonClinical Professor of Pathology, Department of Pathology, British Columbia Cancer Agency, 600 W 10 Avenue, Vancouver, BC, V5Z 4E6, Canada.
Stephen Leach
Bruce Woolcock
Ronald J deLeeuw
Ali Bashashati
Laurie H Sehn
Joseph M Connors
Mukesh Chhanabhai
Angela Brooks-Wilson
Randy D Gascoyne
BC Cancer Agency · CACanada's Michael Smith Genome Sciences Centre · CACancer Research Center · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Rituximab binds an epitope on the CD20 antigen, encompassed in exon 5 of the MS4A1 gene. We sequenced this region and correlated the presence of mutations with CD20 protein expression and response to R-CHOP in patients with diffuse large B-cell lymphoma: 264 diagnostic biopsies and 15 biopsies taken at the time of relapse were successfully sequenced. CD20 mutations involving the rituximab epitope were detected in only 1/264 (0.4%) and 1/15 (6%) of the biopsies taken at diagnosis and relapse, respectively. No polymorphic sequence variants were detected in this region. Three patients had malignant cells that were CD20 protein-positive at diagnosis but CD20-negative at relapse. Thus, CD20 mutations involving the rituximab epitope are rare in both de novo and relapsed diffuse large B-cell lymphoma, and do not represent a significant cause of R-CHOP resistance. CD20 protein-negative relapses occur after R-CHOP therapy but their clinical relevance is unknown.

Indexed as

MutationAmino Acid SequenceAntibodies, MonoclonalAntibodies, Monoclonal, Murine-DerivedAntigens, CD20Antineoplastic Combined Chemotherapy ProtocolsBinding Sites, AntibodyCyclophosphamideDNA Mutational AnalysisDoxorubicinDrug Resistance, NeoplasmEpitopesFemaleHumansImmunohistochemistryLymphoma, Large B-Cell, DiffuseAntibodies, MonoclonalAntibodies, Monoclonal, Murine-DerivedAntigens, CD20CyclophosphamideDoxorubicinEpitopesPrednisoneRituximabVincristine

Identifiers

PMID19211644
PMCPMC2649361
OpenAlexW2067685415

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.