Evidence map›Paper›PMID 12235209›Full record

ArticleThe Journal of experimental medicine2002

A crucial role for the p110delta subunit of phosphatidylinositol 3-kinase in B cell development and activation.

Elizabeth Clayton, Giuseppe Bardi, Sarah E Bell, David Chantry, C Peter Downes, Alexander Gray, Lisa A Humphries, David Rawlings, Helen Reynolds, Elena Vigorito and 1 more

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of experimental medicine, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 194 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
194citing papers in PubMed, 2 pooled it
6.6field-weighted citation impact, top 2% 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

194 citing papers in PubMed, 2 syntheses or guidelines pooled it, 438 citations in OpenAlex.

  1. Pooled it
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  6. Activated PIK3CD drives marginal zone B cell development from early transitional progenitors by enhancing ADAM10 expression.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2026
    Article
  7. From the gene to the clinic: Key milestones in the PI3Kδ journey.Journal of immunology (Baltimore, Md. : 1950) · 2026
    Review
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134 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 5 institutions in 2 countries.

Elizabeth ClaytonLaboratory of Lymphocyte Signaling and Development, Molecular Immunology Programme, The Babraham Institute, Babraham, Cambridge CB2 4AT, United Kingdom.
Giuseppe Bardi
Sarah E Bell
David Chantry
C Peter Downes
Alexander Gray
Lisa A Humphries
David Rawlings
Helen Reynolds
Elena Vigorito
Martin Turner
Babraham Institute · GBUniversity of Dundee · GBUniversity of Washington · USEKOS Corporation · USUniversity of California, Los Angeles · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mice lacking the p110delta catalytic subunit of phosphatidylinositol 3-kinase have reduced numbers of B1 and marginal zone B cells, reduced levels of serum immunoglobulins, respond poorly to immunization with type II thymus-independent antigen, and are defective in their primary and secondary responses to thymus-dependent antigen. p110delta(-/-) B cells proliferate poorly in response to B cell receptor (BCR) or CD40 signals in vitro, fail to activate protein kinase B, and are prone to apoptosis. p110delta function is required for BCR-mediated calcium flux, activation of phosphlipaseCgamma2, and Bruton's tyrosine kinase. Thus, p110delta plays a critical role in B cell homeostasis and function.

Indexed as

Lymphocyte ActivationProtein Serine-Threonine KinasesAgammaglobulinaemia Tyrosine KinaseAnimalsAntibody FormationB-LymphocytesCalciumIsoenzymesMaleMiceMice, KnockoutPhosphatidylinositol 3-KinasesPhosphatidylinositol PhosphatesPhospholipase C gammaProtein SubunitsProtein-Tyrosine KinasesAgammaglobulinaemia Tyrosine KinaseBtk protein, mouseCalciumIsoenzymesphosphatidylinositol 3,4,5-triphosphatePhosphatidylinositol 3-KinasesPhosphatidylinositol PhosphatesPhospholipase C gammaProtein Serine-Threonine KinasesProtein SubunitsProtein-Tyrosine KinasesProto-Oncogene ProteinsProto-Oncogene Proteins c-aktReceptors, Antigen, B-CellType C Phospholipases

Identifiers

PMID12235209
PMCPMC2194055
OpenAlexW2123666692

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-SA
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.