Cited by 142Cytokine Signaling Pathways and InteractionsT-cell and B-cell ImmunologyPsoriasis: Treatment and Pathogenesis

Expanding diversity in molecular structures and functions of the IL-6/IL-12 heterodimeric cytokine family

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Hasegawa, Hideaki, Mizoguchi, Izuru, Chiba, Yukino, Ohashi, Mio, Xu, Mingli, Yoshimoto, Takayuki·2016·Frontiers in Immunology

Abstract

The interleukin (IL)-6/IL-12 family cytokines have pleiotropic functions and play critical roles in multiple immune responses. This cytokine family has very unique characteristics in that they are composed of two distinct subunits forming a heterodimer and each cytokine and receptor subunit shares with each other. The members of this cytokine family are increasing; currently, there are more than 6 cytokines, including the tentatively named cytokines IL-Y (p28/p40), IL-12 (p35/p40), IL-23 (p19/p40), IL-27 [p28/Epstein-Barr virus-induced protein 3 (EBI3)], IL-35 (p35/EBI3), and IL-39 (p19/EBI3). This family of cytokines covers a very broad range of immune responses, including pro-inflammatory responses such as helper T (Th)1, Th2, and Th17 to anti-inflammatory responses such as regulatory T (Treg) cells and IL-10-producing Treg cells. IL-12 is the first member of this family, and IL-12, IL-23, and IL-27 are mainly produced by activated antigen-presenting cells such as dendritic cells and macrophages. IL-12 plays a critical role in the promotion of Th1 immune responses by inducing interferon-γ production to combat pathogens and malignant tumors. IL-23 induces IL-17 production and is necessary to maintain pathogenic Th17 cells that cause inflammatory and autoimmune diseases. IL-27 was initially reported to play a critical role in promotion of Th1 differentiation; however, subsequent studies revealed that IL-27 has broader stimulatory and inhibitory roles by inducing IL-10-producing Treg cells. IL-35 is produced by forkhead box P3+ Treg cells and activated B cells and has immunosuppressive functions to maintain immune tolerance. The most recently identified cytokine, IL-39, is produced by activated B cells and has pro-inflammatory functions. The cytokine tentatively named IL-Y seems to have anti-inflammatory functions by inhibiting Th1 and Th17 differentiation. In addition, individual cytokine subunits were also shown to have self-standing activities. Thus, promiscuity within the IL-6/IL-12 family cytokines complicates structural and functional clarification and assignment of individual cytokines. A better understanding of the recent advances and expanding diversity in molecular structures and functions of the IL-6/IL-12 family cytokines could allow the creation of novel therapeutic strategies by using them as tools and targeted molecules.

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  • IL-6 is a pleiotropic cytokine involved in immune responses, inflammation, hematopoiesis, bone metabolism, embryonic development and other fundamental processes.

    “IL-6, which was discovered in 1986 (27), is a pleiotropic cytokine involved not only in immune responses but also in inflammation, hematopoiesis, bone metabolism, embryonic development and other fundamental processes (1, 21, 28–32).”

    From IL-6 in inflammation, autoimmunity and cancer (2021) · cites this paper as [32]

    The Introduction describes IL-6 as an important inflammatory cytokine, and the Abstract describes pleiotropic immune functions of the IL-6/IL-12 family. The copy does not establish the claimed roles of IL-6 specifically in hematopoiesis, bone metabolism, or embryonic development; its hematopoiesis discussion concerns IL-27. (LLM, conf=0.86)

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Authors
Hasegawa, H., Mizoguchi, I., Chiba, Y., Ohashi, M., Xu, M., & Yoshimoto, T.
Affiliations
Tokyo Medical University (JP)
Corresponding author
Yoshimoto, Takayuki
Venue
Frontiers in Immunology
Published
2016-11-04
Volume
7
Pages
479-479
ISSN
1664-3224 (ISSN-L)
OpenAlex
W2548333195
Cited by
142
References
79
Citations by year
2026: 6 · 2025: 13 · 2024: 16 · 2023: 14 · 2022: 13 · 2021: 16 · 2020: 16 · 2019: 17 · 2018: 22 · 2017: 9
FWCI
1.61
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Immunology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Japan Society for the Promotion of Science (16J04160, 15K07947, 15K08433)
Topics
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Psoriasis: Treatment and Pathogenesis
Keywords
heterodimeric cytokine, IL-12, IL-23, IL-27, IL-35, IL-39, p40 subunit, EBI3, Th1 cells, Th17 cells, regulatory T cells, IL-10, interferon-gamma, IL-17, dendritic cells, macrophages

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