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Petkau G, Mitchell TJ, Evans MJ, Matheson L, Salerno F, Turner M. Zfp36l1 establishes the high-affinity CD8 T-cell response by directly linking TCR affinity to cytokine sensing. Eur J Immunol 2024; 54:e2350700. [PMID: 38039407 PMCID: PMC11146077 DOI: 10.1002/eji.202350700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/03/2023]
Abstract
How individual T cells compete for and respond to IL-2 at the molecular level, and, as a consequence, how this shapes population dynamics and the selection of high-affinity clones is still poorly understood. Here we describe how the RNA binding protein ZFP36L1, acts as a sensor of TCR affinity to promote clonal expansion of high-affinity CD8 T cells. As part of an incoherent feed-forward loop, ZFP36L1 has a nonredundant role in suppressing multiple negative regulators of cytokine signaling and mediating a selection mechanism based on competition for IL-2. We suggest that ZFP36L1 acts as a sensor of antigen affinity and establishes the dominance of high-affinity T cells by installing a hierarchical response to IL-2.
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Affiliation(s)
- Georg Petkau
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | - Twm J. Mitchell
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | | | - Louise Matheson
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | - Fiamma Salerno
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | - Martin Turner
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
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Zhang R, Liu X, Ma Y, Cheng L, Ren Y, Li R. Identification of Cell-Cell Communications by Single-Cell RNA Sequencing in End Stage Renal Disease Provides New Insights into Immune Cell Heterogeneity. J Inflamm Res 2023; 16:4977-5000. [PMID: 37927961 PMCID: PMC10625431 DOI: 10.2147/jir.s424911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 10/17/2023] [Indexed: 11/07/2023] Open
Abstract
Objective Impaired immune system characterized by low-grade inflammation is closely associated with kidney chronic kidney disease (CKD) progression. To reveal the alterations of the function, component, and intercellular communication of immune cells during the progression of CKD. Patients and Methods We conducted a case-control study enrolling regular hemodialysis patients and healthy controls. Clinical data, serum and peripheral blood mononuclear cell (PBMC) samples were collected. Flow cytometry and single-cell RNA sequencing were performed to quantitatively analyze the immune cell subsets and T-cell subsets of PBMCs. scRNA data of GSE140023 containing mouse unilateral ureteral obstruction (UUO) models were analyzed the heterogeneity of immune cells. Results Overall reduction in peripheral blood lymphocyte subsets in patients with end-stage renal disease (ESRD) was observed. A higher ratio of Th17/Treg, Th1/Treg, and b-cell/Treg in the ESRD group was associated with a decrease in eGFR, PTH, and ferritin. Among T cell subsets identified by scRNA analysis, Th17 cells were significantly increased in the ESRD and UU0 group. TFH, Th1, and Th2 cells are located at the final stage in the developmental tree, while Treg and memory CD8+ T cells are at the beginning site. Early developmental differentiation of Th17, Th1, and Tfh cells was observed in the ESRD and UUO group. Analysis of intercellular communication between t-cell subpopulations identified two major input and output signaling pathways: the CD40 and macrophage inhibitory factor (MIF) pathways. The MIF signaling pathway primarily mediates intercellular communication among th17 effects, CD8+ t-cell, and Th17-Treg in the ESRD group, the serum level of MIF showed significant upregulation, which was closely related to Th17/Treg cells. Conclusions A global immune imbalance was closely associated with the deterioration in renal function and complication development. The MIF signaling pathway mediates Th17/Treg communication and promotes the trans-differentiation of Treg cells to Th17 cells in CKD progression.
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Affiliation(s)
- Ruijing Zhang
- Department of Nephrology, The Fifth Hospital of Shanxi Medical University, Taiyuan, People’s Republic of China
- Department of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, People’s Republic of China
- Department of Nephrology, Shanxi Provincial People’s Hospital, Taiyuan, People’s Republic of China
| | - Xinyan Liu
- Department of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, People’s Republic of China
| | - Yuehong Ma
- Department of Nephrology, The Fifth Hospital of Shanxi Medical University, Taiyuan, People’s Republic of China
- Department of Nephrology, Shanxi Provincial People’s Hospital, Taiyuan, People’s Republic of China
| | - Lijuan Cheng
- Department of Nephrology, The Second Hospital of Shanxi Medical University, Taiyuan, People’s Republic of China
| | - Yi Ren
- Department of Nephrology, The Fifth Hospital of Shanxi Medical University, Taiyuan, People’s Republic of China
- Department of Nephrology, Shanxi Provincial People’s Hospital, Taiyuan, People’s Republic of China
| | - Rongshan Li
- Department of Nephrology, The Fifth Hospital of Shanxi Medical University, Taiyuan, People’s Republic of China
- Department of Nephrology, Shanxi Provincial People’s Hospital, Taiyuan, People’s Republic of China
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Kim E, Jang E, Jung W, Kim W, Lee J, Choi DH, Shin BS, Shin S, Kim TH. Establishment of an LC-MS/MS method for quantification of lifitegrast in rabbit plasma and ocular tissues and its application to pharmacokinetic study. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1229:123892. [PMID: 37788538 DOI: 10.1016/j.jchromb.2023.123892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 09/15/2023] [Accepted: 09/20/2023] [Indexed: 10/05/2023]
Abstract
Lifitegrast, a lymphocyte function-associated antigen 1 antagonist, was approved by the FDA for the treatment of dry eye disease. Cornea and conjunctiva have been reported to be the sites of action of lifitegrast. To investigate the pharmacokinetics of lifitegrast, a sensitive analytical method for the determination of lifitegrast in various biological matrices such as plasma and ocular tissues is required. However, only limited information about the analytical method for lifitegrast in biological samples is available. In the present study, we aimed to develop a new liquid chromatography-tandem mass spectrometry method for the determination of lifitegrast in rabbit plasma, cornea, conjunctiva, and sclera. Lifitegrast-d6 was used as an internal standard (IS). To prepare the biological samples, protein precipitation using acetonitrile was utilized. Analytes were separated from endogenous interferences on an Atlantis dC18 (5 µm, 2.1 × 150 mm), and a mixture of 0.1 % formic acid and acetonitrile was used as the mobile phase. The mass transition of precursor to product ion was monitored at 615.2 → 145.0 for lifitegrast and 621.2 → 145.1 for IS. The calibration curves were linear over the concentration range from 2 to 500 ng/mL for plasma and 5 to 500 ng/mL in ocular tissue homogenates. Intra- and inter-day accuracy ranged from 95.76 to 106.80 % in the plasma and 94.42 to 112.80 % in the ocular tissues. Precision was within 8.56 % in the plasma and 9.72 % in the ocular tissues. The short-term, long-term, auto-sampler, and freeze-thaw stabilities of lifitegrast were validated. The developed method was applied to a pharmacokinetic study of lifitegrast in rabbits. Following ophthalmic administration, only 3.26 % of administered lifitegrast was absorbed into the systemic circulation. Peak tissue concentrations were observed at 0.5 h after dosing, and topically administered lifitegrast was mainly distributed in the cornea and conjunctiva. The finding of this study is expected to be used in further pharmacokinetic studies and formulation development.
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Affiliation(s)
- Eunbin Kim
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, Korea
| | - Eunbee Jang
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, Korea
| | - Woohyung Jung
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, Korea
| | - Woojin Kim
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, Korea
| | - Jaewoong Lee
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, Korea
| | - Du Hyung Choi
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, Korea
| | - Beom Soo Shin
- School of Pharmacy, Sungkyunkwan University, Suwon, Gyeonggi, Korea
| | - Soyoung Shin
- College of Pharmacy, Wonkwang University, Iksan, Jeonbuk, Korea.
| | - Tae Hwan Kim
- College of Pharmacy, Daegu Catholic University, Gyeongsan, Gyeongbuk, Korea.
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Mazet JM, Mahale JN, Tong O, Watson RA, Lechuga-Vieco AV, Pirgova G, Lau VWC, Attar M, Koneva LA, Sansom SN, Fairfax BP, Gérard A. IFNγ signaling in cytotoxic T cells restricts anti-tumor responses by inhibiting the maintenance and diversity of intra-tumoral stem-like T cells. Nat Commun 2023; 14:321. [PMID: 36658158 PMCID: PMC9852295 DOI: 10.1038/s41467-023-35948-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 01/10/2023] [Indexed: 01/20/2023] Open
Abstract
IFNγ is an immune mediator with concomitant pro- and anti-tumor functions. Here, we provide evidence that IFNγ directly acts on intra-tumoral CD8 T cells to restrict anti-tumor responses. We report that expression of the IFNγ receptor β chain (IFNγR2) in CD8 T cells negatively correlates with clinical responsiveness to checkpoint blockade in metastatic melanoma patients, suggesting that the loss of sensitivity to IFNγ contributes to successful antitumor immunity. Indeed, specific deletion of IFNγR in CD8 T cells promotes tumor control in a mouse model of melanoma. Chronic IFNγ inhibits the maintenance, clonal diversity and proliferation of stem-like T cells. This leads to decreased generation of T cells with intermediate expression of exhaustion markers, previously associated with beneficial anti-tumor responses. This study provides evidence of a negative feedback loop whereby IFNγ depletes stem-like T cells to restrict anti-tumor immunity. Targeting this pathway might represent an alternative strategy to enhance T cell-based therapies.
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Affiliation(s)
- Julie M Mazet
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Jagdish N Mahale
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Orion Tong
- Department of Oncology, University of Oxford, Oxford, UK
| | | | | | - Gabriela Pirgova
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Vivian W C Lau
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Moustafa Attar
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Lada A Koneva
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | - Stephen N Sansom
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK
| | | | - Audrey Gérard
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK.
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Chiodetti AL, Gérard A. Spatiotemporal behavior of T cells in vaccination. Int J Biochem Cell Biol 2022; 147:106224. [PMID: 35537670 DOI: 10.1016/j.biocel.2022.106224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 04/25/2022] [Accepted: 05/04/2022] [Indexed: 10/18/2022]
Abstract
Vaccines are the most cost-effective resource to contain and eliminate infectious diseases. Despite decades of research in the field, several pathogens have eluded the effect of conventional vaccines mostly due their failure in inducing strong T cell responses. There is a need for new vaccine technologies that can surpass this problem. Recent advances in imaging techniques have allowed the study of T cell dynamics within their surrounding cellular niches. This information is invaluable to elucidate the main cellular mechanisms to target in order to optimize vaccine efficiency. In this review, we summarize the most recent key discoveries in T cell behavior in the context of vaccination and immunization.
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Affiliation(s)
- Ana Laura Chiodetti
- The Kennedy Institute of Rheumatology, University of Oxford, OX3 7FY Oxford, United Kingdom
| | - Audrey Gérard
- The Kennedy Institute of Rheumatology, University of Oxford, OX3 7FY Oxford, United Kingdom.
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Auguste M, Balbi T, Ciacci C, Canesi L. Conservation of Cell Communication Systems in Invertebrate Host-Defence Mechanisms: Possible Role in Immunity and Disease. BIOLOGY 2020; 9:E234. [PMID: 32824821 PMCID: PMC7464772 DOI: 10.3390/biology9080234] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/16/2020] [Accepted: 08/17/2020] [Indexed: 12/14/2022]
Abstract
Innate immunity is continuously revealing multiple and highly conserved host-defence mechanisms. Studies on mammalian immunocytes are showing different communication systems that may play a role in coordinating innate immune responses also in invertebrates. Extracellular traps (ETs) are an immune response by which cells release net-like material, including DNA, histones and proteins. ETs are thought to immobilise and kill microorganisms, but are also involved in inflammation and autoimmune disease. Immune cells are also known to communicate through extracellular vesicles secreted in the extracellular environment or exosomes, which can carry a variety of different signalling molecules. Tunnelling nanotubes (TNTs) represent a direct cell-to-cell communication over a long distance, that allow for bi- or uni-directional transfer of cellular components between cells. Their functional role in a number of physio-pathological processes, including immune responses and pathogen transfer, has been underlined. Although ETs, exosomes, and TNTs have been described in invertebrate species, their possible role in immune responses is not fully understood. In this work, available data on these communication systems are summarised, in an attempt to provide basic information for further studies on their relevance in invertebrate immunity and disease.
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Affiliation(s)
- Manon Auguste
- Department of Earth Environment and Life Sciences (DISTAV), University of Genoa, 16136 Genoa, Italy; (M.A.); (T.B.)
| | - Teresa Balbi
- Department of Earth Environment and Life Sciences (DISTAV), University of Genoa, 16136 Genoa, Italy; (M.A.); (T.B.)
| | - Caterina Ciacci
- Department of Biomolecular Sciences (DIBS), University “Carlo Bo” of Urbino, 61029 Urbino, Italy;
| | - Laura Canesi
- Department of Earth Environment and Life Sciences (DISTAV), University of Genoa, 16136 Genoa, Italy; (M.A.); (T.B.)
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