Evidence map›Paper›PMID 19461124›Full record

ArticleInternational immunology2009

IL-6 produced by immune complex-activated follicular dendritic cells promotes germinal center reactions, IgG responses and somatic hypermutation.

Yongzhong Wu, Mohey Eldin M El Shikh, Rania M El Sayed, Al M Best, Andras K Szakal, John G Tew

Open access · bronzeAbstract read
In one paragraph

Article in International immunology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 49 papers.

0numbers the graph read from it
0cells of the map it votes in
49citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

49 citing papers in PubMed, 88 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Unique and redundant roles of mouse BCMA, TACI, BAFF, APRIL, and IL-6 in supporting antibody-producing cells in different tissues.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Review
  14. Article
  15. Review
  16. Article
  17. Article
  18. Identification of a new subset of lymph node stromal cells involved in regulating plasma cell homeostasis.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  19. Article
  20. Review
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

6 authors at 3 institutions in 2 countries.

Yongzhong WuDepartment of Microbiology and Immunology, Virginia Commonwealth University, Richmond, VA 23298, USA.
Mohey Eldin M El Shikh
Rania M El Sayed
Al M Best
Andras K Szakal
John G Tew
Bipar · FRVirginia Commonwealth University · USCancer Research And Biostatistics · US

Funding

VCU Neuroscience Center Core GrantP30NS047463 · NINDS · VIRGINIA COMMONWEALTH UNIVERSITY · PI POVLISHOCK, JOHN T · 2003 to 2013
$5.0M
NINDS NIH HHS 5P30 NS 047463NINDS NIH HHS P30 NS047463
6 · The paper itself

Abstract

Reports that follicular dendritic cells (FDCs) produce IL-6 prompted the hypotheses that immune complexes (ICs) induce FDCs to produce IL-6 and that FDC-IL-6 promotes germinal center (GC) reactions, somatic hypermutation (SHM) and IgG production. FDCs were activated in vitro by addition of ICs and FDC-IL-6 production was determined. Wild-type (WT) and IL-6 knockout (KO) mice, as well as chimeras with WT and IL-6 KO cells, were immunized with (4-hydroxy-3-nitrophenyl)-acetyl (NP)-chicken gamma globulin (CGG) and used to study anti-(4-hydroxy-3-iodo-5-nitrophenyl) acetyl (NIP) responses, GC formation and SHM in the VH186.2 gene segment in Ig-gamma. FDC-IL-6 increased when FDCs encountered ICs. At low immunogen dose, 1 microg NP-CGG per mouse, the IgG anti-NIP response in IL-6 KO mice was low and immunohistochemistry revealed a reduction in both the number and size of GCs. The physiological relevance of FDC-IL-6 was apparent in the chimeric mice where total splenocytes from WT mice were unable to provide the IL-6 needed for normal IgG and GC responses in IL-6 KO animals with IL-6-defective FDCs. Moreover, the rate of mutation decreased from 18 to 8.9 mutations per 1000 bases (P < 0.001) in WT versus IL-6 KO mice. Addition of anti-IL-6 to GC reactions in vitro reduced antibody levels and SHM from 3.5 to 0.65 mutations per 1000 bases (P < 0.02). Thus, the absence of FDC-IL-6 correlated with a reduction in SHM that coincided with the reduction in GCs and specific anti-NIP. This is the first study to document that ICs induce FDC-IL-6 and that FDC-derived IL-6 is physiologically relevant in generating optimal GC reactions, SHM and IgG levels.

Indexed as

AnimalsAntigen-Antibody ComplexAntigensB-LymphocytesCell CommunicationCell DifferentiationDendritic Cells, FollicularFemaleGerminal CenterImmunizationImmunoglobulin GInterleukin-6MiceMice, Inbred C57BLMice, KnockoutSomatic Hypermutation, ImmunoglobulinAntigen-Antibody ComplexAntigensImmunoglobulin GInterleukin-6

Identifiers

PMID19461124
PMCPMC2686616
OpenAlexW2097105111

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.