Evidence map›Paper›PMID 25385646›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2014

mTOR kinase inhibitors promote antibody class switching via mTORC2 inhibition.

Jose J Limon, Lomon So, Stefan Jellbauer, Honyin Chiu, Juana Corado, Stephen M Sykes, Manuela Raffatellu, David A Fruman

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 1 pooled it
4.0field-weighted citation impact, top 6% 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

51 citing papers in PubMed, 1 synthesis or guideline pooled it, 74 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

8 authors at 3 institutions in 2 countries.

Jose J LimonDepartment of Molecular Biology & Biochemistry, Institute for Immunology, and.
Lomon SoDepartment of Molecular Biology & Biochemistry, Institute for Immunology, and.
Stefan JellbauerInstitute for Immunology, and Department of Microbiology & Molecular Genetics, University of California, Irvine, CA 92697; and.
Honyin ChiuDepartment of Molecular Biology & Biochemistry, Institute for Immunology, and.
Juana CoradoDepartment of Molecular Biology & Biochemistry.
Stephen M SykesFox Chase Cancer Center, Philadelphia, PA 19111.
Manuela RaffatelluInstitute for Immunology, and Department of Microbiology & Molecular Genetics, University of California, Irvine, CA 92697; and.
David A FrumanDepartment of Molecular Biology & Biochemistry, Institute for Immunology, and dfruman@uci.edu.
Institute of Immunology · HRUniversity of California, Irvine · USFox Chase Cancer Center · US

Funding

Univ.of Calif., Irvine Cancer Center Support GrantP30CA062203 · NCI · UNIVERSITY OF CALIFORNIA-IRVINE · PI Joel E Milam · 1994 to 2026
$57.9M
Immunology Research Training ProgramT32AI060573 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI PEARLMAN, ERIC · 2005 to 2020
$1.9M
Mucosal barrier function during Salmonella infectionR01AI083663 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI RAFFATELLU, MANUELA · 2010 to 2014
$1.9M
Foxo transcription factors are required for maintenance of acute myeloid leukemiaR00CA158461 · NCI · RESEARCH INST OF FOX CHASE CAN CTR · PI SYKES, STEPHEN MATTHEW · 2012 to 2014
$641k
Solving the elusive mechanism of rapamycin action in lymphocytesR21AI099656 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI FRUMAN, DAVID ALEXANDER · 2012 to 2013
$409k
Immunoregulatory effects of novel mTOR inhibitorsR03AI085462 · NIAID · UNIVERSITY OF CALIFORNIA-IRVINE · PI FRUMAN, DAVID ALEXANDER · 2010 to 2011
$143k
NCI NIH HHS P30 CA062203NCI NIH HHS P30-CA62203NCI NIH HHS R00 CA158461NCI NIH HHS R00-CA158461NIAID NIH HHS R01 AI083663NIAID NIH HHS R01-AI083663NIAID NIH HHS R03 AI085462NIAID NIH HHS R03-AI085462NIAID NIH HHS R21 AI099656NIAID NIH HHS R21-AI099656NIAID NIH HHS T32 AI060573NIAID NIH HHS T32-AI060573
6 · The paper itself

Abstract

The mammalian target of rapamycin (mTOR) is a kinase that functions in two distinct complexes, mTORC1 and mTORC2. In peripheral B cells, complete deletion of mTOR suppresses germinal center B-cell responses, including class switching and somatic hypermutation. The allosteric mTORC1 inhibitor rapamycin blocks proliferation and differentiation, but lower doses can promote protective IgM responses. To elucidate the complexity of mTOR signaling in B cells further, we used ATP-competitive mTOR kinase inhibitors (TOR-KIs), which inhibit both mTORC1 and mTORC2. Although TOR-KIs are in clinical development for cancer, their effects on mature lymphocytes are largely unknown. We show that high concentrations of TOR-KIs suppress B-cell proliferation and differentiation, yet lower concentrations that preserve proliferation increase the fraction of B cells undergoing class switching in vitro. Transient treatment of mice with the TOR-KI compound AZD8055 increased titers of class-switched high-affinity antibodies to a hapten-protein conjugate. Mechanistic investigation identified opposing roles for mTORC1 and mTORC2 in B-cell differentiation and showed that TOR-KIs enhance class switching in a manner dependent on forkhead box, subgroup O (FoxO) transcription factors. These observations emphasize the distinct actions of TOR-KIs compared with rapamycin and suggest that TOR-KIs might be useful to enhance production of class-switched antibodies following vaccination.

Indexed as

Allosteric RegulationAnimalsImmunoglobulin Class SwitchingImmunoglobulin GMechanistic Target of Rapamycin Complex 2MiceMice, Inbred C57BLMultiprotein ComplexesProtein Kinase InhibitorsSirolimusTOR Serine-Threonine KinasesImmunoglobulin GMechanistic Target of Rapamycin Complex 2Multiprotein ComplexesProtein Kinase InhibitorsSirolimusTOR Serine-Threonine KinasesB lymphocyteclass switchingdifferentiationkinaserapamycin

Identifiers

PMID25385646
PMCPMC4250172
OpenAlexW2002368085

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.