Cited by 194Psoriasis: Treatment and PathogenesisT-cell and B-cell ImmunologyIL-33, ST2, and ILC Pathways

Heterogeneity of human effector CD4+ T cells

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Annunziato, Francesco, Romagnani, Sergio·2009·Arthritis Research & Therapy

Abstract

For many years the heterogeneity of CD4+ T-helper (Th) cells has been limited to Th1 and Th2 cells, which have been considered not only to be responsible for different types of protective responses, but also for the pathogenesis of many disorders. Th1 cells are indeed protective against intracellular microbes and they are thought to play a pathogenic role in organ-specific autoimmune and other chronic inflammatory disorders. Th2 cells provide protection against helminths, but are also responsible for the pathogenesis of allergic diseases. The identification and cloning of new cytokines has allowed one to enlarge the series of functional subsets of CD4+ Th effector cells. In particular, CD4+ Th cells producing IL-17 and IL-22, named Th17, have been initially implicated in the pathogenesis of many chronic inflammatory disorders instead of Th1 cells. However, the more recent studies in both humans and mice suggest that Th17 cells exhibit a high plasticity toward Th1 cells and that both Th17 and Th1 cells may be pathogenic. More recently, another two subsets of effector CD4+ Th cells, named Th9 and Th22 cells, have been described, even if their pathophysiological meaning is still unclear. Despite the heterogeneity of CD4+ effector Th cells being higher than previously thought and some of their subsets exhibiting high plasticity, the Th1/Th2 paradigm still maintains a strong validity.

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  • Differences in the proportions of CD4+ effector memory T-cells producing combinations of TNF-a, IL-2 and IFN-g after TGN1412 stimulation may reflect the heterogeneous nature of this population, which contains multiple functional subsets with different cytokine repertoires.

    “Differences in the proportions of CD4 + effector memory T-cells producing TNF-a, IL-2 and IFN-g combinations following TGN1412 stimulation may reflect the heterogeneous nature of this population which contains multiple functional subsets with different cytokine repertoires (e.g.Th1, Th2, Th9, Th17 and Th22) (Annunziato and Romagnani, 2009;Sallusto and Lanzavecchia, 2009).”

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Authors
Annunziato, F., & Romagnani, S.
Affiliations
University of Florence (IT)
Corresponding author
Romagnani, Sergio
Venue
Arthritis Research & Therapy
Published
2009
Volume
11
Issue
6
Pages
257
ISSN
1478-6354 (ISSN-L)
OpenAlex
W2008783725
Cited by
194
References
12
Citations by year
2026: 2 · 2025: 4 · 2024: 2 · 2023: 4 · 2022: 9 · 2021: 10 · 2020: 9 · 2019: 14 · 2018: 11 · 2017: 9 · 2016: 11 · 2015: 10 · 2014: 28 · 2013: 17 · 2012: 27
FWCI
1.41
Type
journal article
Language
en
Open access
Locations
  • Arthritis Research & Therapy (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion, other-oa)
Funders
  • European Commission (LSHB-CT-2005-518167)
  • Associazione Italiana per la Ricerca sul Cancro
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Psoriasis: Treatment and Pathogenesis
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › IL-33, ST2, and ILC Pathways
Keywords
CD4+ T cells, Th1 cells, Th2 cells, Th17 cells, Th9 cells, Th22 cells, IL-17, IL-22, T cell plasticity, chronic inflammatory diseases, autoimmune disease, allergic diseases, Th1/Th2 paradigm
MeSH terms
Animals, Humans, CD4-Positive T-Lymphocytes, T-Lymphocyte Subsets, Mice

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