Evidence map›Paper›PMID 26919392›Full record

ReviewClinical and experimental immunology2016

Cut to the chase: a review of CD26/dipeptidyl peptidase-4's (DPP4) entanglement in the immune system.

C Klemann, L Wagner, M Stephan, S von Hörsten

Abstract readReview
In one paragraph

Review in Clinical and experimental immunology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 241 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
241citing papers in PubMed, 4 pooled it
–field-weighted citation impact
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

241 citing papers in PubMed, 4 syntheses or guidelines pooled it.

  1. Pooled it
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  4. Diabetes and COVID-19: A systematic review on the current evidences.Diabetes research and clinical practice · 2020
    Pooled it
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  17. AI-Guided Binding Mechanisms and Molecular Dynamics for MERS-CoV.International journal of molecular sciences · 2026
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  19. Article
  20. Review

181 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

4 authors.

C KlemannCenter of Pediatric Surgery, Hannover Medical School, Hannover.
L WagnerDeutschsprachige Selbsthilfegruppe für Alkaptonurie (DSAKU) e.V.
M StephanClinic for Psychosomatics and Psychotherapy, Hannover Medical School, Hannover.
S von HörstenDepartment for Experimental Therapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

CD26/DPP4 (dipeptidyl peptidase 4/DP4/DPPIV) is a surface T cell activation antigen and has been shown to have DPP4 enzymatic activity, cleaving-off amino-terminal dipeptides with either L-proline or L-alanine at the penultimate position. It plays a major role in glucose metabolism by N-terminal truncation and inactivation of the incretins glucagon-like peptide-1 (GLP) and gastric inhibitory protein (GIP). In 2006, DPP4 inhibitors have been introduced to clinics and have been demonstrated to efficiently enhance the endogenous insulin secretion via prolongation of the half-life of GLP-1 and GIP in patients. However, a large number of studies demonstrate clearly that CD26/DPP4 also plays an integral role in the immune system, particularly in T cell activation. Therefore, inhibition of DPP4 might represent a double-edged sword. Apart from the metabolic benefit, the associated immunological effects of long term DPP4 inhibition on regulatory processes such as T cell homeostasis, maturation and activation are not understood fully at this stage. The current data point to an important role for CD26/DPP4 in maintaining lymphocyte composition and function, T cell activation and co-stimulation, memory T cell generation and thymic emigration patterns during immune-senescence. In rodents, critical immune changes occur at baseline levels as well as after in-vitro and in-vivo challenge. In patients receiving DPP4 inhibitors, evidence of immunological side effects also became apparent. The scope of this review is to recapitulate the role of CD26/DPP4 in the immune system regarding its pharmacological inhibition and T cell-dependent immune regulation.

Indexed as

Immunity, InnateAnimalsCell MovementChemokinesCytokinesDiabetes Mellitus, Type 2Dipeptidyl Peptidase 4Dipeptidyl-Peptidase IV InhibitorsGene Expression RegulationGlucagon-Like Peptide 1GlucoseHumansImmunologic MemoryInsulinLymphocyte ActivationT-LymphocytesChemokinesCytokinesDipeptidyl Peptidase 4Dipeptidyl-Peptidase IV InhibitorsDPP4 protein, humanGlucagon-Like Peptide 1Glucosegranulocyte inhibitory protein, humanInsulinautoimmunityB cellcell activationchemokinesT cells

Identifiers

PMID26919392
PMCPMC4908298

What OpenQuestion holds

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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.