Evidence map›Paper›PMID 7684739›Full record

ArticleThe Journal of cell biology1993

Transfection of the CD20 cell surface molecule into ectopic cell types generates a Ca2+ conductance found constitutively in B lymphocytes.

J K Bubien, L J Zhou, P D Bell, R A Frizzell, T F Tedder

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of cell biology, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 101 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
101citing papers in PubMed, 1 pooled it
4.3field-weighted citation impact, top 5% 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

101 citing papers in PubMed, 1 synthesis or guideline pooled it, 351 citations in OpenAlex.

  1. Ocrelizumab for multiple sclerosis.The Cochrane database of systematic reviews · 2022
    Pooled it
  2. Rituximab-induced direct inhibition of T-cell activation.Cancer immunology, immunotherapy : CII · 2012
    Trial
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  16. A metatranscriptomic approach to explore longitudinal tissue specimens from non-healing diabetes related foot ulcers.APMIS : acta pathologica, microbiologica, et immunologica Scandinavica · 2022
    Article
  17. Review
  18. Article
  19. Article
  20. Article

41 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

5 authors at 1 institution in 1 country.

J K BubienDepartment of Medicine, University of Alabama, Birmingham 35294.
L J Zhou
P D Bell
R A Frizzell
T F Tedder
University of Alabama at Birmingham · US

Funding

THE BIOLOGY AND TREATMENT OF HUMAN LEUKEMIA AND LYMPHOMAP01CA034183 · NCI · DANA-FARBER CANCER INSTITUTE · PI SCHLOSSMAN, STUART F · 1985 to 1994
–
MOLECULAR ANALYSIS OF B LYMPHOCYTE-RESTRICTED PROTEINSR01AI026872 · NIAID · DUKE UNIVERSITY · PI TEDDER, THOMAS F · 1988 to 1998
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CHLORIDE SECRETION BY EPITHELIAL TISSUESR01DK031091 · NIDDK · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI FRIZZELL, RAYMOND A · 1986 to 1998
–
NCI NIH HHS CA-34183NIAID NIH HHS AI-26872NIDDK NIH HHS DK-31091
6 · The paper itself

Abstract

CD20 is a plasma membrane phosphoprotein expressed exclusively by B lymphocytes. mAb binding to CD20 alters cell cycle progression and differentiation, indicating that CD20 plays an essential role in B lymphocyte function. Whole-cell patch clamp and fluorescence microscopy measurements of plasma membrane ionic conductance and cytosolic-free Ca2+ activity, respectively, were used to directly examine CD20 function. Transfection of human T and mouse pre-B lymphoblastoid cell lines with CD20 cDNA and subsequent stable expression of CD20 specifically increased transmembrane Ca2+ conductance. Transfection of CD20 cDNA and subsequent expression of CD20 in nonlymphoid cells (human K562 erythroleukemia cells and mouse NIH-3T3 fibroblasts) also induced the expression of an identical transmembrane Ca2+ conductance. The binding of a CD20-specific mAb to CD20+ lymphoblastoid cells also enhanced the transmembrane Ca2+ conductance. The mAb-enhanced Ca2+ currents had the same conductance characteristics as the CD20-associated Ca2+ currents in CD20 cDNA-transfected cells. C20 is structurally similar to several ion channels; each CD20 monomer possesses four membrane spanning domains, and both the amino and carboxy termini reside within the cytoplasm. Biochemical cross-linking of cell-surface molecules with subsequent immunoprecipitation analysis of CD20 suggests that CD20 may be present as a multimeric oligomer within the membrane, as occurs with several known membrane channels. Taken together, these findings indicate that CD20 directly regulates transmembrane Ca2+ conductance in B lymphocytes, and suggest that multimeric complexes of CD20 may form Ca2+ conductive ion channels in the plasma membrane of B lymphoid cells.

Indexed as

Antibodies, MonoclonalAntigens, CDAntigens, CD20Antigens, Differentiation, B-LymphocyteB-LymphocytesCalciumCell CycleCytosolElectric ConductivityHumansIn Vitro TechniquesIon Channel GatingLymphocyte ActivationMacromolecular SubstancesPhosphorylationTetradecanoylphorbol AcetateAntibodies, MonoclonalAntigens, CDAntigens, CD20Antigens, Differentiation, B-LymphocyteCalciumMacromolecular SubstancesTetradecanoylphorbol Acetate

Identifiers

PMID7684739
PMCPMC2119683
OpenAlexW2096055205

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.