The Roles of Tissue-Resident Memory T Cells in Lung Diseases

Yuan, Rui; Yu, Jiang; Jiao, Ziqiao; Li, Jinfei; Wu, Fang; Yan, Rongkai; Huang, Xiaojie; Chen, Chen

doi:10.3389/fimmu.2021.710375

Cited by 21 publications

(27 citation statements)

References 105 publications

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“…CXCR6, as tissue residence marker, is likely a better marker to define resident memory T cells (Trm), and the proportion of CCR6+CD4+ T cell also increased in the graft, suggesting that there are more memory CD4+ T cells in liver transplantation. Trm maintain immunity in diverse sites, and play an essential role in orchestrating the adaptive immune system through crosstalk ( 32 ). Lung transplant recipients exhibiting higher frequencies of persisting donor Trm experienced fewer adverse clinical events compared with recipients with low donor Trm persistence ( 33 ).…”

Section: Discussionmentioning

confidence: 99%

Landscape of Immune Cells Heterogeneity in Liver Transplantation by Single-Cell RNA Sequencing Analysis

et al. 2022

Front. Immunol.

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Rejection is still a critical barrier to the long-term survival of graft after liver transplantation, requiring clinicians to unveil the underlying mechanism of liver transplant rejection. The cellular diversity and the interplay between immune cells in the liver graft microenvironment remain unclear. Herein, we performed single-cell RNA sequencing analysis to delineate the landscape of immune cells heterogeneity in liver transplantation. T cells, NK cells, B cells, and myeloid cell subsets in human liver and blood were enriched to characterize their tissue distribution, gene expression, and functional modules. The proportion of CCR6+CD4+ T cells increased within an allograft, suggesting that there are more memory CD4+ T cells after transplantation, in parallel with exhausted CTLA4+CD8+ T and actively proliferating MKI67+CD8+ T cells increased significantly, where they manifested heterogeneity, distinct function, and homeostatic proliferation. Remarkably, the changes of CD1c+ DC, CADM+ DC, MDSC, and FOLR3+ Kupffer cells increase significantly, but the proportion of CD163+ Kupffer, APOE+ Kupffer, and GZMA+ Kupffer decreased. Furthermore, we identified LDLR as a novel marker of activated MDSC to prevent liver transplant rejection. Intriguingly, a subset of CD4+CD8+FOXP3+ T cells included in CTLA4+CD8+ T cells was first detected in human liver transplantation. Furthermore, intercellular communication and gene regulatory analysis implicated the LDLR+ MDSC and CTLA4+CD8+ T cells interact through TIGIT-NECTIN2 signaling pathway. Taken together, these findings have gained novel mechanistic insights for understanding the immune landscape in liver transplantation, and it outlines the characteristics of immune cells and provides potential therapeutic targets in liver transplant rejection.

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Section: Discussionmentioning

confidence: 99%

Landscape of Immune Cells Heterogeneity in Liver Transplantation by Single-Cell RNA Sequencing Analysis

et al. 2022

Front. Immunol.

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“…First, we examined post-vaccination lung infiltration of experienced memory T cells. These T RM cells are characterized by CD69 expression as well as CD103 expression in the CD8 compartment 37 . The levels of lung-resident CD69 + CD4 + T cells were not significantly different between i.n.…”

Section: Resultsmentioning

confidence: 99%

Intranasal self-amplifying RNA SARS-CoV-2 vaccine produces protective respiratory and systemic immunity and prevents viral transmission

Jennewein

Beaver

Battisti

et al. 2022

Preprint

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While mRNA vaccines have been highly effective over the past 2 years in combating severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), waning of vaccine-induced antibody responses and lack of induction of respiratory tract immunity contribute to ongoing infection and transmission. However, intranasally (i.n.) administered vaccines may induce mucosal immunity at the site of respiratory virus infection and may thus boost protection. In this work, we present an i.n. administered SARS-CoV-2 self-amplifying RNA (saRNA) vaccine, delivered by a nanostructured lipid carrier (NLC), which induces both potent respiratory mucosal and systemic immune responses. Following prime-boost immunization in C57BL/6 mice, i.n. vaccination induces serum neutralizing antibody titers, bone marrow resident IgG-secreting cells, and robust systemic polyfunctional T cells, similar to intramuscular (i.m.) vaccination. The intranasal vaccine additionally induces key SARS-CoV-2-reactive lung-resident polyfunctional memory and lung-homing T cell populations. As a booster following i.m. administration, the i.n. vaccine also elicits robust mucosal and systemic immunity, exceeding an i.m. booster, durable for at least 4 months. The potent mucosal and systemic immunogenicity of this i.n. saRNA vaccine may be key for combating SARS-CoV-2 and other respiratory pathogens.

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“…Trm plays an immunomodulatory role in several organs( 40 ). Trm also serves in the coordination of the adaptive immune system through crosstalk( 41 ). By annotating the different immune cell types in liver transplantation, we assessed the relative importance of different immune checkpoint molecules in human liver transplantation.…”

Section: Discussionmentioning

confidence: 99%

Single-cell RNA-seq revealing the immune features of donor liver during liver transplantation

Sangbong

Qi²,

Zhang³

et al. 2023

Front. Immunol.

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Immune cells, including T and B cells, are key factors in the success of liver transplantation. And the repertoire of T cells and B cells plays an essential function in mechanism of the immune response associated with organ transplantation. An exploration of their expression and distribution in donor organs could contribute to a better understanding of the altered immune microenvironment in grafts. In this study, using single-cell 5’ RNA sequence and single-cell T cell receptor (TCR)/B cell receptor (BCR) repertoire sequence, we profiled immune cells and TCR/BCR repertoire in three pairs of donor livers pre- and post-transplantation. By annotating different immune cell types, we investigated the functional properties of monocytes/Kupffer cells, T cells and B cells in grafts. Bioinformatic characterization of differentially expressed genes (DEGs) between the transcriptomes of these cell subclusters were performed to explore the role of immune cells in inflammatory response or rejection. In addition, we also observed shifts in TCR/BCR repertoire after transplantation. In conclusion, we profiled the immune cell transcriptomics and TCR/BCR immune repertoire of liver grafts during transplantation, which may offer novel strategies for monitoring recipient immune function and treatment of rejection after liver transplantation.

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The Roles of Tissue-Resident Memory T Cells in Lung Diseases

Cited by 21 publications

References 105 publications

Landscape of Immune Cells Heterogeneity in Liver Transplantation by Single-Cell RNA Sequencing Analysis

Landscape of Immune Cells Heterogeneity in Liver Transplantation by Single-Cell RNA Sequencing Analysis

Intranasal self-amplifying RNA SARS-CoV-2 vaccine produces protective respiratory and systemic immunity and prevents viral transmission

Single-cell RNA-seq revealing the immune features of donor liver during liver transplantation

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