Evidence map›Paper›PMID 21720558›Full record

ArticlePloS one2011

Systemic BCG immunization induces persistent lung mucosal multifunctional CD4 T(EM) cells which expand following virulent mycobacterial challenge.

Daryan A Kaveh, Véronique S Bachy, R Glyn Hewinson, Philip J Hogarth

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
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

44 citing papers in PubMed, 71 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

4 authors at 1 institution in 1 country.

Daryan A KavehTB Research Group, Animal Health and Veterinary Laboratories Agency (AHVLA), Addlestone, Surrey, United Kingdom.
Véronique S Bachy
R Glyn Hewinson
Philip J Hogarth
Animal and Plant Health Agency · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

To more closely understand the mechanisms of how BCG vaccination confers immunity would help to rationally design improved tuberculosis vaccines that are urgently required. Given the established central role of CD4 T cells in BCG induced immunity, we sought to characterise the generation of memory CD4 T cell responses to BCG vaccination and M. bovis infection in a murine challenge model. We demonstrate that a single systemic BCG vaccination induces distinct systemic and mucosal populations of T effector memory (T(EM)) cells in vaccinated mice. These CD4+CD44(hi)CD62L(lo)CD27⁻ T cells concomitantly produce IFN-γ and TNF-α, or IFN-γ, IL-2 and TNF-α and have a higher cytokine median fluorescence intensity MFI or 'quality of response' than single cytokine producing cells. These cells are maintained for long periods (>16 months) in BCG protected mice, maintaining a vaccine-specific functionality. Following virulent mycobacterial challenge, these cells underwent significant expansion in the lungs and are, therefore, strongly associated with protection against M. bovis challenge. Our data demonstrate that a persistent mucosal population of T(EM) cells can be induced by parenteral immunization, a feature only previously associated with mucosal immunization routes; and that these multifunctional T(EM) cells are strongly associated with protection. We propose that these cells mediate protective immunity, and that vaccines designed to increase the number of relevant antigen-specific T(EM) in the lung may represent a new generation of TB vaccines.

Indexed as

ImmunizationAdministration, IntranasalAnimalsAntigens, CDCD4-Positive T-LymphocytesCell ProliferationFemaleHumansImmunologic MemoryInterferon-gammaInterleukin-2LungMiceMice, Inbred BALB CMucous MembraneMycobacterium bovisAntigens, CDInterferon-gammaInterleukin-2Tumor Necrosis Factor-alpha

Identifiers

PMID21720558
PMCPMC3123368
OpenAlexW2071738812

What OpenQuestion holds

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LicenceCC BY
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.