2,943 results match your criteria tissue-resident cells


Expanding the role of bacterial vaccines into life-course vaccination strategies and prevention of antimicrobial-resistant infections.

Authors:
Jan T Poolman

NPJ Vaccines 2020 Sep 11;5(1):84. Epub 2020 Sep 11.

Bacterial Vaccine Discovery & Early Development, Janssen, Leiden, Netherlands.

A crisis in bacterial infections looms as ageing populations, increasing rates of bacteraemia and healthcare-associated infections converge with increasing antimicrobial resistance and a paucity of new antimicrobial classes. New initiatives are needed to develop bacterial vaccines for older adults in whom immune senescence plays a critical role. Novel vaccines require an expanded repertoire to prevent mucosal diseases such as pneumonia, skin and soft tissue infections and urinary tract infections that are major causes of morbidity and mortality in the elderly, and key drivers of antimicrobial resistance. Read More

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September 2020

Tissue-resident memory T cells correlate with the inflammatory tumor microenvironment and improved prognosis in head and neck squamous cell carcinoma.

Oral Oncol 2021 Sep 8;122:105508. Epub 2021 Sep 8.

Department of Otolaryngology-Head and Neck Surgery, Gunma University Graduate School of Medicine, 3-39-22, Showa-machi, Maebashi, Gunma 371-8511, Japan.

Objectives: Tumor-infiltrating T cell (TIL) is a major cell type involved in tumor eradication in the tumor microenvironment (TME). Among TILs, tissue-resident memory T cells (Ts) have been recognized as a subset capable of continuous immunosurveillance to afford long-term immunity. In the present study, we comprehensively profiled T in patients with head and neck squamous cell carcinoma (HNSCC). Read More

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September 2021

Elevated Fibronectin Levels in Profibrotic CD14 Monocytes and CD14 Macrophages in Systemic Sclerosis.

Front Immunol 2021 24;12:642891. Epub 2021 Aug 24.

Department of Rheumatology, Center of Experimental Rheumatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland.

Background: Systemic sclerosis (SSc) is an autoimmune disease characterized by overproduction of extracellular matrix (ECM) and multiorgan fibrosis. Animal studies pointed to bone marrow-derived cells as a potential source of pathological ECM-producing cells in immunofibrotic disorders. So far, involvement of monocytes and macrophages in the fibrogenesis of SSc remains poorly understood. Read More

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Skin-Resident Memory T Cells: Pathogenesis and Implication for the Treatment of Psoriasis.

J Clin Med 2021 Aug 26;10(17). Epub 2021 Aug 26.

Department of Dermatology, Course of Integrated Medicine, Graduate School of Medicine/Faculty of Medicine, Osaka University, Osaka 565-0871, Japan.

Tissue-resident memory T cells (T) stay in the peripheral tissues for long periods of time, do not recirculate, and provide the first line of adaptive immune response in the residing tissues. Although T originate from circulating T cells, T are physiologically distinct from circulating T cells with the expression of tissue-residency markers, such as CD69 and CD103, and the characteristic profile of transcription factors. Besides defense against pathogens, the functional skew of skin T is indicated in chronic skin inflammatory diseases. Read More

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Group 2 innate lymphoid cells in bone marrow regulate osteoclastogenesis in a reciprocal manner via RANKL, GM-CSF and IL-13.

Int Immunol 2021 Sep 9. Epub 2021 Sep 9.

Laboratory for Innate Immune Systems, RIKEN Center for Integrative Medical Sciences (IMS), 1-7-22 Suehiro-cho Turumi-ku Yokohama-shi, Kanagawa 230-0045, Japan.

Group 2 innate lymphoid cells (ILC2s) are tissue-resident cells that play different roles in different organs by sensing surrounding environmental factors. Initially, it was thought that ILC2s in bone marrow (BM) are progenitors for systemic ILC2s, which migrate to other organs and acquire effector functions. However, accumulating evidence that ILC2s differentiate in peripheral tissues suggests that BM ILC2s may play a specific role in the BM as a unique effector per se. Read More

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September 2021

Skin Resident Memory T Cells May Play Critical Role in Delayed-Type Drug Hypersensitivity Reactions.

Front Immunol 2021 23;12:654190. Epub 2021 Aug 23.

Department of Dermatology, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, United States.

Delayed-type drug hypersensitivity reactions (dtDHR) are immune-mediated reactions with skin and visceral manifestations ranging from mild to severe. Clinical care is negatively impacted by a limited understanding of disease pathogenesis. Though T cells are believed to orchestrate disease, the type of T cell and the location and mechanism of T cell activation remain unknown. Read More

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Single-cell RNA sequencing reveals the heterogeneity of infiltrating immune cell profiles in the hepatic cystic echinococcosis microenvironment.

Infect Immun 2021 Sep 7:IAI0029721. Epub 2021 Sep 7.

State Key Laboratory of Pathogenesis, Prevention and Management of High Incidence Diseases in Central Asia, The First Affiliated Hospital of Xinjiang Medical University, 830054 Urumqi, Xinjiang, China.

Human cystic echinococcosis, caused by the larval stage of , has been reported a near-cosmopolitan zoonotic disease. Various infiltrating immune cells gather around the lesion and produce lesion microenvironment, however cellular composition and heterogeneity in hepatic cystic echinococcosis lesion microenvironment are incompletely understood. Here, 81,865 immune cells isolated from peripheral blood, peri-lesion liver tissue, and adjacent normal liver tissue from four cystic echinococcosis patients were profiled using single-cell RNA sequencing. Read More

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September 2021

Perspectives on the dynamic implications of cellular senescence and immunosenescence on macrophage aging biology.

Authors:
Rohit Sharma

Biogerontology 2021 Sep 6. Epub 2021 Sep 6.

Faculty of Applied Sciences & Biotechnology, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, India.

An intricate relationship between impaired immune functions and the age-related accumulation of tissue senescent cells is rapidly emerging. The immune system is unique as it undergoes mutually inclusive and deleterious processes of immunosenescence and cellular senescence with advancing age. While factors inducing immunosenescence and cellular senescence may be shared, however, both these processes are fundamentally different which holistically influence the aging immune system. Read More

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September 2021

Tissue Tregs and Maintenance of Tissue Homeostasis.

Front Cell Dev Biol 2021 18;9:717903. Epub 2021 Aug 18.

Hepatobiliary Center, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.

Regulatory T cells (Tregs) specifically expressing Forkhead box P3 (Foxp3) play roles in suppressing the immune response and maintaining immune homeostasis. After maturation in the thymus, Tregs leave the thymus and migrate to lymphoid tissues or non-lymphoid tissues. Increasing evidence indicates that Tregs with unique characteristics also have significant effects on non-lymphoid peripheral tissues. Read More

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The Role of Distinct Subsets of Macrophages in the Pathogenesis of MS and the Impact of Different Therapeutic Agents on These Populations.

Front Immunol 2021 20;12:667705. Epub 2021 Aug 20.

Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.

Multiple sclerosis (MS) is a demyelinating inflammatory disorder of the central nervous system (CNS). Besides the vital role of T cells, other immune cells, including B cells, innate immune cells, and macrophages (MФs), also play a critical role in MS pathogenesis. Tissue-resident MФs in the brain's parenchyma, known as microglia and monocyte-derived MФs, enter into the CNS following alterations in CNS homeostasis that induce inflammatory responses in MS. Read More

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Functional Heterogeneity of Reelin in the Oral Squamous Cell Carcinoma Microenvironment.

Front Oncol 2021 17;11:692390. Epub 2021 Aug 17.

Central Laboratory of Stomatology, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing, China.

Background: Reelin, an extracellular glycoprotein, is expressed on neuronal cells and participates in neuronal migration during brain development. Recently, Reelin also has a vital role in carcinogenesis. However, its role in oral squamous cell carcinoma (OSCC) remains to be explored. Read More

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Vaginal Delivery of Vaccines.

Adv Drug Deliv Rev 2021 Sep 1:113956. Epub 2021 Sep 1.

Department of Bioengineering, University of Washington, Seattle, WA 98105, United States of America. Electronic address:

Recent estimates suggest that one in two sexually active individuals will acquire a sexually transmitted infection by age 25, an alarming statistic that amounts to over 1 million new infections per day worldwide. Vaccination against STIs is highly desirable for alleviating this global burden of disease. Vaginal immunization is a promising strategy to combat transmission via the vaginal mucosa. Read More

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September 2021

The precursors of CD8 tissue resident memory T cells: from lymphoid organs to infected tissues.

Nat Rev Immunol 2021 Sep 3. Epub 2021 Sep 3.

Division of Molecular Oncology & Immunology, Oncode Institute, The Netherlands Cancer Institute, Amsterdam, The Netherlands.

CD8 tissue resident memory T cells (T cells) are essential for immune defence against pathogens and malignancies, and the molecular processes that lead to T cell formation are therefore of substantial biomedical interest. Prior work has demonstrated that signals present in the inflamed tissue micro-environment can promote the differentiation of memory precursor cells into mature T cells, and it was therefore long assumed that T cell formation adheres to a 'local divergence' model, in which T cell lineage decisions are exclusively made within the tissue. However, a growing body of work provides evidence for a 'systemic divergence' model, in which circulating T cells already become preconditioned to preferentially give rise to the T cell lineage, resulting in the generation of a pool of T cell-poised T cells within the lymphoid compartment. Read More

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September 2021

Elucidating the Motif for CpG Oligonucleotide Binding to the Dendritic Cell Receptor DEC-205 Leads to Improved Adjuvants for Liver-Resident Memory.

J Immunol 2021 Sep 3. Epub 2021 Sep 3.

Infection and Immunity Program, Monash Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia;

DEC-205 is a cell-surface receptor that transports bound ligands into the endocytic pathway for degradation or release within lysosomal endosomes. This receptor has been reported to bind a number of ligands, including keratin, and some classes of CpG oligodeoxynucleotides (ODN). In this study, we explore in detail the requirements for binding ODNs, revealing that DEC-205 efficiently binds single-stranded, phosphorothioated ODN of ≥14 bases, with preference for the DNA base thymidine, but with no requirement for a CpG motif. Read More

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September 2021

Severity of Sepsis Determines the Degree of Impairment Observed in Circulatory and Tissue-Resident Memory CD8 T Cell Populations.

J Immunol 2021 Sep 3. Epub 2021 Sep 3.

Department of Pathology, University of Iowa, Iowa City, IA;

Sepsis reduces the number and function of memory CD8 T cells within the host, contributing to the long-lasting state of immunoparalysis. Interestingly, the relative susceptibility of memory CD8 T cell subsets to quantitative/qualitative changes differ after cecal ligation and puncture (CLP)-induced sepsis. Compared with circulatory memory CD8 T cells (T), moderate sepsis (0-10% mortality) does not result in numerical decline of CD8 tissue-resident memory T cells (T), which retain their "sensing and alarm" IFN-γ-mediated effector function. Read More

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September 2021

Single-cell RNA-seq reveals functionally distinct biomaterial degradation-related macrophage populations.

Biomaterials 2021 Aug 30;277:121116. Epub 2021 Aug 30.

Department of Orthopedic Surgery (Sports Medicine) of the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China; Dr. Li Dak Sum & Yip Yio Chin Center for Stem Cells and Regenerative Medicine, Zhejiang University School of Medicine, Hangzhou, China; Key Laboratory of Tissue Engineering and Regenerative Medicine of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou, China; Department of Sports Medicine, Zhejiang University School of Medicine, Hangzhou, China; Institute of Sports Medicine, Zhejiang University, Hangzhou, China; China Orthopedic Regenerative Medicine Group (CORMed), Hangzhou, China. Electronic address:

Macrophages play crucial roles in host tissue reaction to biomaterials upon implantation in vivo. However, the complexity of biomaterial degradation-related macrophage subpopulations that accumulate around the implanted biomaterials in situ is not fully understood. Here, using single cell RNA-seq, we analyze the transcriptome profiles of the various cell types around the scaffold to map the scaffold-induced reaction, in an unbiased approach. Read More

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IL-33 causes thermogenic failure in aging by expanding dysfunctional adipose ILC2.

Cell Metab 2021 Aug 26. Epub 2021 Aug 26.

Department of Comparative Medicine, Yale School of Medicine, New Haven, CT, USA; Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA; Yale Center for Research on Aging, Yale University, New Haven, CT, USA. Electronic address:

Aging impairs the integrated immunometabolic responses, which have evolved to maintain core body temperature in homeotherms to survive cold stress, infections, and dietary restriction. Adipose tissue inflammation regulates the thermogenic stress response, but how adipose tissue-resident cells instigate thermogenic failure in the aged are unknown. Here, we define alterations in the adipose-resident immune system and identify that type 2 innate lymphoid cells (ILC2s) are lost in aging. Read More

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Tissue environment, not ontogeny, defines murine intestinal intraepithelial T lymphocytes.

Elife 2021 Sep 2;10. Epub 2021 Sep 2.

Cell Signalling and Immunology, University of Dundee, Dundee, United Kingdom.

Tissue-resident intestinal intraepithelial T lymphocytes (T-IEL) patrol the gut and have important roles in regulating intestinal homeostasis. T-IEL include both induced T-IEL, derived from systemic antigen-experienced lymphocytes, and natural IEL, which are developmentally targeted to the intestine. While the processes driving T-IEL development have been elucidated, the precise roles of the different subsets and the processes driving activation and regulation of these cells remain unclear. Read More

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September 2021

Single-cell transcriptomic landscape reveals tumor specific innate lymphoid cells associated with colorectal cancer progression.

Cell Rep Med 2021 Aug 27;2(8):100353. Epub 2021 Jul 27.

Shanghai Institute of Immunology, Department of Immunology and Microbiology, and the Ministry of Education Key Laboratory of Cell Death and Differentiation, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.

Innate lymphoid cells (ILCs) are tissue-resident lymphocytes differing from conventional T lymphocytes in having no antigen-specific receptors. ILCs include natural killer (NK) cells, helper-like ILC1s, ILC2s, and ILC3s, and lymphoid tissue-inducer (LTi) cells. Tumor ILCs are frequently found in various cancers, but their roles in cancer immunity and immunotherapy remain largely unclear. Read More

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Exploiting dynamic enhancer landscapes to decode macrophage and microglia phenotypes in health and disease.

Mol Cell 2021 Aug 25. Epub 2021 Aug 25.

Department of Medicine, University of California, San Diego, San Diego, CA, USA; Department of Cellular and Molecular Medicine, University of California, San Diego, San Diego, CA, USA. Electronic address:

The development and functional potential of metazoan cells is dependent on combinatorial roles of transcriptional enhancers and promoters. Macrophages provide exceptionally powerful model systems for investigation of mechanisms underlying the activation of cell-specific enhancers that drive transitions in cell fate and cell state. Here, we review recent advances that have expanded appreciation of the diversity of macrophage phenotypes in health and disease, emphasizing studies of liver, adipose tissue, and brain macrophages as paradigms for other tissue macrophages and cell types. Read More

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Deep immune profiling of the maternal-fetal interface with mild SARS-CoV-2 infection.

bioRxiv 2021 Aug 23. Epub 2021 Aug 23.

Pregnant women are an at-risk group for severe COVID-19, though the majority experience mild/asymptomatic disease. Although severe COVID-19 has been shown to be associated with immune activation at the maternal-fetal interface even in the absence of active viral replication, the immune response to asymptomatic/mild COVID-19 remains unknown. Here, we assessed immunological adaptations in both blood and term decidua from 9 SARS-exposed pregnant women with asymptomatic/mild disease and 15 pregnant SARS-naive women. Read More

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An integrated pipeline for comprehensive analysis of immune cells in human brain tumor clinical samples.

Nat Protoc 2021 Aug 30. Epub 2021 Aug 30.

Department of Oncology, University of Lausanne, Lausanne, Switzerland.

Human tissue samples represent an invaluable source of information for the analysis of disease-specific cellular alterations and their variation between different pathologies. In cancer research, advancing a comprehensive understanding of the unique characteristics of individual tumor types and their microenvironment is of considerable importance for clinical translation. However, investigating human brain tumor tissue is challenging due to the often-limited availability of surgical specimens. Read More

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HepaticIschemia/Reperfusion Injuryinvolves functional tryptase/PAR-2 signaling in liver sinusoidal endothelial cell population.

Int Immunopharmacol 2021 Aug 25;100:108052. Epub 2021 Aug 25.

Geriatric Cancer Center, Huadong Hospital, Fudan University, West 221 Yan-an Road, Shanghai 200040, China. Electronic address:

Mast cells (MCs) are tissue-resident effector cells that could be the earliest responder to release a unique, stimulus-specific set of mediators in hepatic ischemia-reperfusion (IR) injury However, how MCs function in the hepatic IR has remained a formidable challenge due to the substantial redundancy and functional diverse of these mediators. Tryptase is the main protease for degranulation of MCs and its receptor-protease-activated receptor 2 (PAR-2) is widely expressed in endothelial cells. It is unclear whether and how tryptase/PAR-2 axis participates in hepatic IR. Read More

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Cytomegalovirus Infection Impairs the Mobilization of Tissue-Resident Innate Lymphoid Cells into the Peripheral Blood Compartment in Response to Acute Exercise.

Viruses 2021 Aug 3;13(8). Epub 2021 Aug 3.

School of Kinesiology, Louisiana State University, Baton Rouge, LA 70803, USA.

Circulating immune cell numbers and phenotypes are impacted by high-intensity acute bouts of exercise and infection history with the latent herpesviruses cytomegalovirus (CMV). In particular, CMV infection history impairs the exercise-induced mobilization of cytotoxic innate lymphoid cells 1 (ILC1) cells, also known as NK cells, in the blood. However, it remains unknown whether exercise and CMV infection modulate the mobilization of traditionally tissue-resident non-cytotoxic ILCs into the peripheral blood compartment. Read More

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Tissue-Resident Memory T Cells in Skin Diseases: A Systematic Review.

Int J Mol Sci 2021 Aug 20;22(16). Epub 2021 Aug 20.

Department of Dermatology, Aarhus University Hospital, DK-8200 Aarhus, Denmark.

In health, the non-recirculating nature and long-term persistence of tissue-resident memory T cells (TRMs) in tissues protects against invading pathogens. In disease, pathogenic TRMs contribute to the recurring traits of many skin diseases. We aimed to conduct a systematic literature review on the current understanding of the role of TRMs in skin diseases and identify gaps as well as future research paths. Read More

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Single-Cell Transcriptomics Reveals Core Regulatory Programs That Determine the Heterogeneity of Circulating and Tissue-Resident Memory CD8 T Cells.

Cells 2021 Aug 20;10(8). Epub 2021 Aug 20.

Versiti Blood Research Institute, Milwaukee, WI 53213, USA.

During acute infections, CD8 T cells form various memory subpopulations to provide long-lasting protection against reinfection. T central memory (TCM), T effector memory (TEM), and long-lived effector (LLE) cells are circulating memory populations with distinct plasticity, migration patterns, and effector functions. Tissue-resident memory (TRM) cells permanently reside in the frontline sites of pathogen entry and provide tissue-specific protection upon reinfection. Read More

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Tissue-Resident T Cells in Chronic Relapsing-Remitting Intestinal Disorders.

Cells 2021 Jul 25;10(8). Epub 2021 Jul 25.

Division of Experimental Pathology, Institute of Pathology, University of Bern, 3008 Bern, Switzerland.

Tissue-resident memory T (T) cells critically contribute to the rapid immunoprotection and efficient immunosurveillance against pathogens, particularly in barrier tissues, but also during anti-tumor responses. However, the involvement of T cells also in the induction and exacerbation of immunopathologies, notably in chronically relapsing auto-inflammatory disorders, is becoming increasingly recognized as a critical factor. Thus, T cells may also represent an attractive target in the management of chronic (auto-) inflammatory disorders, including multiple sclerosis, rheumatoid arthritis, celiac disease and inflammatory bowel diseases. Read More

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Macrophage as a Peripheral Pain Regulator.

Cells 2021 Jul 24;10(8). Epub 2021 Jul 24.

Laboratory of Pharmacology and Pathophysiology, Faculty of Pharmacy, Kindai University, Higashi-Osaka 577-8502, Japan.

A neuroimmune crosstalk is involved in somatic and visceral pathological pain including inflammatory and neuropathic components. Apart from microglia essential for spinal and supraspinal pain processing, the interaction of bone marrow-derived infiltrating macrophages and/or tissue-resident macrophages with the primary afferent neurons regulates pain signals in the peripheral tissue. Recent studies have uncovered previously unknown characteristics of tissue-resident macrophages, such as their origins and association with regulation of pain signals. Read More

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Alveolar macrophages rely on GM-CSF from alveolar epithelial type 2 cells before and after birth.

J Exp Med 2021 Oct 25;218(10). Epub 2021 Aug 25.

Institute of Physiology, University of Zurich, Zurich, Switzerland.

Programs defining tissue-resident macrophage identity depend on local environmental cues. For alveolar macrophages (AMs), these signals are provided by immune and nonimmune cells and include GM-CSF (CSF2). However, evidence to functionally link components of this intercellular cross talk remains scarce. Read More

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October 2021

A peptide derived from chaperonin 60.1, IRL201104, inhibits LPS-induced acute lung inflammation.

Am J Physiol Lung Cell Mol Physiol 2021 08 25. Epub 2021 Aug 25.

Sackler Institute of Pulmonary Pharmacology, Institute of Pharmaceutical Science, King's College London, London, United Kingdom.

Chaperonin 60.1 (Cpn60.1) is a protein derived from M. Read More

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