Evidence map›Paper›PMID 26839574›Full record

ArticleImmunity & ageing : I & A2016

Efforts of the human immune system to maintain the peripheral CD8+ T cell compartment after childhood thymectomy.

Manuela Zlamy, Giovanni Almanzar, Walther Parson, Christian Schmidt, Johannes Leierer, Birgit Weinberger, Verena Jeller, Karin Unsinn, Matthias Eyrich, Reinhard Würzner and 1 more

Open access · goldAbstract read
In one paragraph

Article in Immunity & ageing : I & A, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
1.4field-weighted citation impact, top 20% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

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  16. Myasthenia gravis and infectious disease.Journal of neurology · 2018
    Review
  17. The significance of neonatal thymectomy for shaping the immune system in children with congenital heart defects.Kardiochirurgia i torakochirurgia polska = Polish journal of cardio-thoracic surgery · 2017
    Review
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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

11 authors at 4 institutions in 2 countries.

Manuela ZlamyDepartment of Pediatrics, Medical University Innsbruck, Innsbruck, Austria.
Giovanni AlmanzarDepartment of Pediatrics, University Hospital Wuerzburg, University of Wuerzburg, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany.
Walther ParsonInstitute of Legal Medicine, Medical University Innsbruck, Innsbruck, Austria ; Penn State Eberly College of Science, University Park, PA USA.
Christian SchmidtDepartment of Haematology and Oncology, University of Greifswald, Greifswald, Germany.
Johannes LeiererDepartment of Internal Medicine, Medical University Innsbruck, Innsbruck, Austria.
Birgit WeinbergerInstitute for Biomedical Aging Research, University of Innsbruck, Innsbruck, Austria.
Verena JellerDepartment of Pediatrics, Medical University Innsbruck, Innsbruck, Austria.
Karin UnsinnDepartment of Radiology, Medical University Innsbruck, Innsbruck, Austria.
Matthias EyrichDepartment of Pediatrics, University Hospital Wuerzburg, University of Wuerzburg, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany.
Reinhard WürznerDepartment of Hygiene and Medical Microbiology, Medical University Innsbruck, Innsbruck, Austria.
Martina PrelogDepartment of Pediatrics, University Hospital Wuerzburg, University of Wuerzburg, Josef-Schneider-Str. 2, 97080 Wuerzburg, Germany.
Innsbruck Medical University · ATUniversitätsklinikum Würzburg · DEUniversität Greifswald · DEUniversität Innsbruck · AT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHomeostatic mechanisms to maintain the T cell compartment diversity indicate an ongoing process of thymic activity and peripheral T cell renewal during human life. These processes are expected to be accelerated after childhood thymectomy and by the influence of cytomegalovirus (CMV) inducing a prematurely aged immune system. The study aimed to investigate proportional changes and replicative history of CD8+ T cells, of recent thymic emigrants (RTEs) and CD103+ T cells (mostly gut-experienced) and the role of Interleukin-(IL)-7 and IL-7 receptor (CD127)-expressing T cells in thymectomized patients compared to young and old healthy controls.

resultsDecreased proportions of naive and CD31 + CD8+ T cells were demonstrated after thymectomy, with higher proliferative activity of CD127-expressing T cells and significantly shorter relative telomere lengths (RTLs) and lower T cell receptor excision circles (TRECs). Increased circulating CD103+ T cells and a skewed T cell receptor (TCR) repertoire were found after thymectomy similar to elderly persons. Naive T cells were influenced by age at thymectomy and further decreased by CMV.

conclusionsAfter childhood thymectomy, the immune system demonstrated constant efforts of the peripheral CD8+ T cell compartment to maintain homeostasis. Supposedly it tries to fill the void of RTEs by peripheral T cell proliferation, by at least partly IL-7-mediated mechanisms and by proportional increase of circulating CD103+ T cells, reminiscent of immune aging in elderly. Although other findings were less significant compared to healthy elderly, early thymectomy demonstrated immunological alterations of CD8+ T cells which mimic features of premature immunosenescence in humans.

Indexed as

CD8CMVNaive T cellsTCR diversityTelomeresThymectomyTRECs

Identifiers

PMID26839574
PMCPMC4736487
OpenAlexW2290328465

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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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.