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Specialty: Allergy & Immunology
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Total 121118 results found since Jan 2013.
Patients With Rheumatism Have Premature Immune System Aging Patients With Rheumatism Have Premature Immune System Aging
Researchers have studied how the T-cell aging process translates into metabolic reprogramming of the T-cells in patients with rheumatoid arthritis.Medscape Medical News
Source: Medscape Allergy Headlines - September 22, 2023 Category: Allergy & Immunology Tags: Rheumatology News Source Type: news
NLRP2 in health and disease
Immunology. 2023 Sep 22. doi: 10.1111/imm.13699. Online ahead of print.ABSTRACTNLR family pyrin domain containing 2 (NLRP2) is a novel member of the Nod-like receptor (NLR) family. However, our understanding of NLRP2 has long been ambiguous. NLRP2 may have a role in the innate immune response, but its 'specific' functions remain controversial. Although NLRP2 can initiate inflammasome and promote inflammation, it can also downregulate inflammatory signals. Additionally, NLRP2 has been reported to function in the reproductive system and shows high expression in the placenta. However, the exact role of NLRP2 in the reproducti...
Source: Immunology - September 22, 2023 Category: Allergy & Immunology Authors: Tongtong Zhang Fei Xing Mingcui Qu Zhihu Yang Yafei Liu Yongchao Yao Na Xing Source Type: research
Depletion of mTOR ameliorates CD < sub > 4 < /sub > < sup > + < /sup > T cell pyroptosis by promoting autophagy activity in septic mice
In this study, a septic mouse model was developed using cecal ligation and puncture (CLP) to explore the degree of pyroptosis and autophagy of CD4+ T cells. T-cell-specific mTOR/TSC1-knockout mice were used to investigate the role of mTOR pathway in the regulation of CD4+ T cell pyroptosis. Bafilomycin, a specific autophagy inhibitor, was used to verify the regulatory effect of autophagy on pyroptosis in septic mice. We observed aggravated pyroptosis in CD4+ T cells in CLP mice accompanied by impaired autophagy activity and an overactivated mTOR signaling pathway. Depletion of mTOR relieved autophagy deficiency and reduced...
Source: International Immunopharmacology - September 22, 2023 Category: Allergy & Immunology Authors: Ran Guo Guoyu Zhao Guangxu Bai Jianwei Chen Wen Han Na Cui Hao Wang Source Type: research
The Lysosomal Calcium Channel TRPML1 Maintains Mitochondrial Fitness in NK Cells through Interorganelle Cross-Talk
In this study, we examined the role of TRPML1 (TRP cation channel, mucolipin subfamily, member 1) in regulating the homeostasis of secretory lysosomes and their cross-talk with mitochondria in human NK cells. We found that genetic deletion of TRPML1, which localizes to lysosomes in NK cells, led to mitochondrial fragmentation with evidence of collapsed mitochondrial cristae. Consequently, TRPML1-/- NK92 (NK92ML1-/-) displayed loss of mitochondrial membrane potential, increased reactive oxygen species stress, reduced ATP production, and compromised respiratory capacity. Using sensitive organelle-specific probes, we observed...
Source: Journal of Immunology - September 22, 2023 Category: Allergy & Immunology Authors: Dennis Clement Edina K Szabo Silje Zandstra Krokeide Merete Thune Wiiger Marianna Vincenti Daniel Palacios Young-Tae Chang Christian Grimm Sandip Patel Harald Stenmark Andreas Brech Rakesh Kumar Majhi Karl-Johan Malmberg Source Type: research
Mass Spectrometric Profiling of HLA-B44 Peptidomes Provides Evidence for Tapasin-Mediated Tryptophan Editing
J Immunol. 2023 Sep 22:ji2300232. doi: 10.4049/jimmunol.2300232. Online ahead of print.ABSTRACTThe extreme polymorphisms of HLA class I proteins result in structural variations in their peptide binding sites to achieve diversity in Ag presentation. External factors could independently constrict or alter HLA class I peptide repertoires. Such effects of the assembly factor tapasin were assessed for HLA-B*44:05 (Y116) and a close variant, HLA-B*44:02 (D116), which have low and high tapasin dependence, respectively, for their cell surface expression. Analyses of the HLA-B*44:05 peptidomes in the presence and absence of tapasin...
Source: Journal of Immunology - September 22, 2023 Category: Allergy & Immunology Authors: Amanpreet Kaur Avrokin Surnilla Anita J Zaitouna Michael B Mumphrey Venkatesha Basrur Irina Grigorova Marcin Cieslik Mary Carrington Alexey I Nesvizhskii Malini Raghavan Source Type: research
Methiothepin downregulates SNAP-23 and inhibits degranulation of rat basophilic leukemia cells and mouse bone marrow-derived mast cells
This article is protected by copyright. All rights reserved.PMID:37736882 | DOI:10.1002/eji.202250360
Source: European Journal of Immunology - September 22, 2023 Category: Allergy & Immunology Authors: Daisuke Kondo Ruriko Suzuki Ayako Matsumura Hitomi Meguri Masahiko Tanaka Makoto Itakura Naohide Hirashima Source Type: research
Loss of αβ but not γδ T cells in chickens causes a severe phenotype
This article is protected by copyright. All rights reserved.PMID:37735713 | DOI:10.1002/eji.202350503
Source: European Journal of Immunology - September 22, 2023 Category: Allergy & Immunology Authors: Theresa von Heyl Romina Klinger Dorothea Aumann Christian Zenner Mohanned Alhussien Antonina Schlickenrieder Kamila Lengyel Hanna-Kaisa Vikkula Teresa Mittermair Hicham Sid Benjamin Schusser Source Type: research
M2 macrophage inhibits the antitumor effects of Lenvatinib on intrahepatic cholangiocarcinoma
ConclusionCompared with M1, M2 macrophages can inhibit the anti-tumor effect of Lenvatinib on cholangiocarcinoma through immune regulation, which may be related to the tumor angiogenesis factor effect of M2 macrophage.
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
Flow cytometric analysis of innate lymphoid cells: challenges and solutions
DiscussionThe ILC population is heterogeneous and the strategies to identify ILCs have to be designed for each ILC population and tissue. Excluding T cells in all cases is crucial, and a combination of transcription factors GATA3, RORγt, T-bet, and Eomes should be used to identify ILCs. Using CD3ϵ/TCRs in a different fluorochrome not in Lin cocktail minimizes contamination of T cells specifically identify individual ILC populations in various tissues.
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
Impact of BRAFV600E mutation on aggressiveness and outcomes in adult clonal histiocytosis
Histiocytoses encompass a wide spectrum of diseases, all characterized by tissue infiltration by CD68+ histiocytes. Most adult histiocytoses are considered clonal diseases because they highlight recurrent somatic mutations in the MAP-kinase pathway gene, primarily BRAF. The presence of BRAF mutation is associated with widespread disease in children with Langerhans cell histiocytosis (LCH) or cardiovascular/neurological involvement in Erdheim–Chester disease (ECD). Nevertheless, few data are available on adult clonal histiocytosis. This is why we have conducted a retrospective study of all patients with clonal histiocytos...
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
Homologs of bacterial heat-labile enterotoxin subunit A contribute to development, stress response, and virulence in filamentous entomopathogenic fungus Beauveria bassiana
This study expands our understanding of the enterotoxin_A domain proteins in fungal physiology and deepens mechanisms involved in the lifestyle of fungal insect pathogens.
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
Antigen-driven T cell-macrophage interactions mediate the interface between innate and adaptive immunity in histidyl-tRNA synthetase-induced myositis
DiscussionOverall, HRS-induced myositis reflects the complex interplay between multiple cell types that collectively drive a TH1-predominant, pro-inflammatory tissue phenotype requiring antigen-mediated activation of both MyD88- and TCR-dependent T cell signaling pathways.
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
Attenuated IL-2 muteins leverage the TCR signal to enhance regulatory T cell homeostasis and response in vivo
Interleukin-2 (IL-2), along with T-cell receptor (TCR) signaling, are required to control regulatory T cell (Treg) homeostasis and function in vivo. Due to the heightened sensitivity to IL-2, Tregs retain the ability to respond to low-dose or attenuated forms of IL-2, as currently being developed for clinical use to treat inflammatory diseases. While attenuated IL-2 increases Treg selectivity, the question remains as to whether a weakened IL-2 signal sufficiently enhances Treg suppressive function(s) toward disease modification. To understand this question, we characterized the in vivo activity and transcriptomic profiles ...
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
Clinical features and mutational analysis of X-linked agammaglobulinemia patients in Malaysia
ConclusionThis report provides the first overview of demographic, clinical, immunological and genetic data of XLA in Malaysia. The combination of flow cytometric assessment and BTK genetic analysis provides a definitive diagnosis for XLA patients, especially with atypical clinical presentation. In addition, it may also allow carrier detection and assist in genetic counselling and prenatal diagnosis.
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
Epigenetic targeting to enhance acute myeloid leukemia-directed immunotherapy
AML is a malignant disease of hematopoietic progenitor cells with unsatisfactory treatment outcome, especially in patients that are ineligible for intensive chemotherapy. Immunotherapy, comprising checkpoint inhibition, T-cell engaging antibody constructs, and cellular therapies, has dramatically improved the outcome of patients with solid tumors and lymphatic neoplasms. In AML, these approaches have been far less successful. Discussed reasons are the relatively low mutational burden of AML blasts and the difficulty in defining AML-specific antigens not expressed on hematopoietic progenitor cells. On the other hand, epigen...
Source: Frontiers in Immunology - September 22, 2023 Category: Allergy & Immunology Source Type: research
