PMID- 32888774 OWN - NLM STAT- MEDLINE DCOM- 20220217 LR - 20220217 IS - 1096-0023 (Electronic) IS - 1043-4666 (Linking) VI - 147 DP - 2021 Nov TI - Cytokines in the generation and function of regulatory T cell subsets in leishmaniasis. PG - 155266 LID - S1043-4666(20)30282-9 [pii] LID - 10.1016/j.cyto.2020.155266 [doi] AB - CD4(+) T regulatory cells (Tregs) are a group of T lymphocytes that maintain self-tolerance and protect the host from inflammation-induced tissue damage. An interacting network of cytokines and transcription factors influence the origin, differentiation, and function of the Tregs in primary and secondary lymphoid organs. However, following antigenic stimulation, it can also be induced at the sites of infection. Immune cell resident microbial pathogens, such as Leishmania, employ varieties of mechanisms to promote the suppressive functions of Tregs for protective evasion from the host immune system. This establishes a state of immune unresponsiveness in the host, exacerbating the disease in Leishmania infection. Elimination of Leishmania pathogens is accomplished with a strong pro-inflammatory response accompanied by the release of host protective cytokines such as Interleukin-2 (IL-2), Interferon-gamma (IFN-gamma), and Tumor necrosis factor-alpha (TNF-alpha), which functions through suppression of Tregs or making the effector cells recalcitrant to Treg mediated suppression. Nevertheless, during chronic infection, the persistence of unwarranted pro-inflammatory cytokines can trigger self-tissue damage. Tregs limit the consequence of chronic inflammation to restrict self-harm suggesting its mutually opposing role in host protection. Furthermore, Tregs function to prevent complete parasite clearance to provide long-term immunity to re-infection. This review summarizes the roles of pro-inflammatory and anti-inflammatory cytokines involved in the homing, activation, differentiation, and suppression of Tregs in the course of Leishmania infection. We also suggest cytokines that can be modulated as potential therapeutic targets to treat Leishmania infection. CI - Copyright (c) 2020 Elsevier Ltd. All rights reserved. FAU - Ghosh, Sanhita AU - Ghosh S AD - Cellular Immunology and Experimental Therapeutics Laboratory, Department of Zoology, West Bengal State University, Barasat, 24 Parganas (North), West Bengal, India. FAU - Roy, Kamalika AU - Roy K AD - Cellular Immunology and Experimental Therapeutics Laboratory, Department of Zoology, West Bengal State University, Barasat, 24 Parganas (North), West Bengal, India. FAU - Rajalingam, Radhakrishnan AU - Rajalingam R AD - Immune Cell Engineering and Therapy Lab, Center for Stem Cell Research, Christian Medical College, Vellore, Tamil Nadu, India. FAU - Martin, Sunil AU - Martin S AD - Immune Cell Engineering and Therapy Lab, Center for Stem Cell Research, Christian Medical College, Vellore, Tamil Nadu, India. Electronic address: sunil.martin@cmcvellore.ac.in. FAU - Pal, Chiranjib AU - Pal C AD - Cellular Immunology and Experimental Therapeutics Laboratory, Department of Zoology, West Bengal State University, Barasat, 24 Parganas (North), West Bengal, India. Electronic address: chiranjibpal.zoology@wbsu.ac.in. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20200902 PL - England TA - Cytokine JT - Cytokine JID - 9005353 RN - 0 (Cytokines) SB - IM MH - Animals MH - Cytokines/*immunology MH - Humans MH - Leishmania/*immunology MH - Leishmaniasis/*immunology MH - T-Lymphocyte Subsets/*immunology MH - T-Lymphocytes, Regulatory/*immunology OTO - NOTNLM OT - Cytokines OT - FoxP3 OT - Leishmaniasis OT - Tr1 OT - iTregs OT - nTregs EDAT- 2020/09/06 06:00 MHDA- 2022/02/19 06:00 CRDT- 2020/09/05 12:18 PHST- 2020/05/20 00:00 [received] PHST- 2020/07/30 00:00 [revised] PHST- 2020/08/24 00:00 [accepted] PHST- 2020/09/06 06:00 [pubmed] PHST- 2022/02/19 06:00 [medline] PHST- 2020/09/05 12:18 [entrez] AID - S1043-4666(20)30282-9 [pii] AID - 10.1016/j.cyto.2020.155266 [doi] PST - ppublish SO - Cytokine. 2021 Nov;147:155266. doi: 10.1016/j.cyto.2020.155266. Epub 2020 Sep 2.