Identification and functional characterization of CD8+ T regulatory cells in type 1 diabetes patients.


Journal

PloS one
ISSN: 1932-6203
Titre abrégé: PLoS One
Pays: United States
ID NLM: 101285081

Informations de publication

Date de publication:
2019
Historique:
received: 29 10 2018
accepted: 02 01 2019
entrez: 17 1 2019
pubmed: 17 1 2019
medline: 23 10 2019
Statut: epublish

Résumé

Type 1 diabetes is an autoimmune disease where autoreactive T lymphocytes destroy pancreatic beta cells. We previously reported a defect in CD4+ Tregs cell proliferation and reduced CD4+ Tregs PD-1 expression in patients. Another 'memory-like' regulatory subset, CD8+ Tregs, evaluated as CD8+CD25+FOXP3+, has recently raised interest for their effective suppressive activity. Different CD8+ T cell populations, their proliferation capacity and expression of PD-1 molecule were evaluated by flow-cytometer analysis in newly diagnosed, long-term Type 1 diabetes patients compared to healthy normal donors. Under basal conditions, CD8+ Tregs and CD8+ Teffs were seemingly represented among study groups while there was evidence of diminished expression of PD-1 in Teff subsets of long-term patients. After 3 days of PMA/ionomycin stimulation, patients CD8+ Tregs showed decreased percentage in respect to control group. CD8+ Teffs were instead increased in long-term diabetics versus controls. PD-1+CD8+ Tregs were represented at a much lower percentage in long-term diabetic patients, in respect to controls. Importantly, patients CD8+ Tregs and CD8+ Teffs presented a significant proliferation defect in respect to the control group. In conclusion, our study indicates that a defect of CD8+ Tregs is observed in diabetics. This subset could thus represent a novel target of immunotherapy in patients.

Identifiants

pubmed: 30650147
doi: 10.1371/journal.pone.0210839
pii: PONE-D-18-31176
pmc: PMC6334945
doi:

Substances chimiques

Biomarkers 0
Glycated Hemoglobin A 0
PDCD1 protein, human 0
Programmed Cell Death 1 Receptor 0
hemoglobin A1c protein, human 0
Ionomycin 56092-81-0
Tetradecanoylphorbol Acetate NI40JAQ945

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

e0210839

Déclaration de conflit d'intérêts

The authors have declared that no competing interests exist.

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Auteurs

Marsha Pellegrino (M)

Infectivology and Clinical Trials Research Division, Bambino Gesù Children's Hospital, Rome, Italy.

Antonino Crinò (A)

Endocrinology Department, Bambino Gesù Children's Hospital, Rome, Italy.

Manuela M Rosado (MM)

Bambino Gesù Children's Hospital, Research Laboratories, Rome, Italy.

Alessandra Fierabracci (A)

Infectivology and Clinical Trials Research Division, Bambino Gesù Children's Hospital, Rome, Italy.

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