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Specialty: Allergy & Immunology
Nutrition: Calcium

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Total 17 results found since Jan 2013.

Activation of ryanodine-sensitive calcium store drives pseudo-allergic dermatitis via Mas-related G protein-coupled receptor X2 in mast cells
Mast cell (MC) activation is implicated in the pathogenesis of multiple immunodysregulatory skin disorders. Activation of an IgE-independent pseudo-allergic route has been recently found to be mainly mediated via Mas-Related G protein-coupled receptor X2 (MRGPRX2). Ryanodine receptor (RYR) regulates intracellular calcium liberation. Calcium mobilization is critical in the regulation of MC functional programs. However, the role of RYR in MRGPRX2-mediated pseudo-allergic skin reaction has not been fully addressed. To study the role of RYR in vivo, we established a murine skin pseudo-allergic reaction model. RYR inhibitor att...
Source: Frontiers in Immunology - June 19, 2023 Category: Allergy & Immunology Source Type: research

Hesperetin ameliorates spinal cord injury by inhibiting NLRP3 inflammasome activation and pyroptosis through enhancing Nrf2 signaling
Int Immunopharmacol. 2023 Mar 28;118:110103. doi: 10.1016/j.intimp.2023.110103. Online ahead of print.ABSTRACTNeuroinflammation is a prominent feature of traumatic spinal cord injuries (SCIs). Hesperetin exhibits anti-inflammatory effects in neurological disorders; however, the potential neuroprotective effects of hesperetin in cases of SCI remain unclear. Sprague-Dawley rats with C5 hemi-contusion injuries were used as an SCI model. Hesperetin was administered to the experimental rats in order to investigate its neuroprotective effects after SCI, and BV2 cells were pretreated with hesperetin or silencing of nuclear factor...
Source: International Immunopharmacology - March 31, 2023 Category: Allergy & Immunology Authors: Zhongyuan Liu Kewu Tu Peiqian Zou Congrui Liao Ruoting Ding Zucheng Huang Zhiping Huang Xinqiang Yao Jianting Chen Zhongmin Zhang Source Type: research

Anti-inflammatory role of extracellular l-arginine through calcium sensing receptor in human renal proximal tubular epithelial (HK-2) cells
Int Immunopharmacol. 2023 Feb 22;117:109853. doi: 10.1016/j.intimp.2023.109853. Online ahead of print.ABSTRACTRenal tubular epithelial cells are capable of synthesizing interleukins (IL) in response to a variety of proinflammatory cytokines. Moreover, elevated urinary levels of IL have been shown in patients with various forms of nephritic diseases. However, the underlying intracellular signaling mechanism is unclear. Here we show the immunological signaling role of l-Arginine (l-Arg) through Ca2+-sensing receptor (CaSR) in human kidney 2 (HK-2) renal proximal tubular epithelial cells, using Ca2+ imaging and patch clamp te...
Source: International Immunopharmacology - February 24, 2023 Category: Allergy & Immunology Authors: Samuel Shin Eugenia Awuah Boadi Saloni Shah Madison Ezell Peijun Li Bidhan C Bandyopadhyay Source Type: research

Inhibition of Dyrk1A Attenuates LPS-Induced Neuroinflammation via the TLR4/NF- κB P65 Signaling Pathway
This study investigated the role of Dyrk1A in regulating neuroinflammation, another critical factor that contributes to AD. In the present study, we used an immortalized murine BV2 microglia cell line induced by lipopolysaccharide (LPS) to study neuroinflammation. The expression and activity of Dyrk1A kinase were both increased by inflammation. Dyrk1A inhibition using harmine or siRNA silencing significantly reduced the production of proinflammatory factors in LPS-stimulated BV2 cells. Reactive oxygen species (ROS), tumor necrosis factor-α (TNF-α), and nitric oxide (NO), as well as the expression of the inflammatory prot...
Source: Inflammation - August 2, 2022 Category: Allergy & Immunology Source Type: research

CXCR4 inhibition attenuates calcium oxalate crystal deposition-induced renal fibrosis
Int Immunopharmacol. 2022 Mar 4;107:108677. doi: 10.1016/j.intimp.2022.108677. Online ahead of print.ABSTRACTNephrolithiasis is a highly prevalent urological disease and results in a correspondingly heavy socioeconomic and healthcare burden. Calcium oxalate (CaOx) stones are among the most common types of kidney stones. They are associated with renal tubular damage, interstitial fibrosis and chronic kidney disease (CKD). However, the molecular mechanisms in CaOx crystal deposition-induced renal fibrosis remain unclear. Chemokines and their receptors act a crucial role in the progression of renal fibrosis through inflammato...
Source: International Immunopharmacology - March 7, 2022 Category: Allergy & Immunology Authors: Zehua Ye Yuqi Xia Xiangjun Zhou Bojun Li Weimin Yu Yuan Ruan Haoyong Li JinZhuo Ning Lijia Chen Ting Rao Fan Cheng Source Type: research

CRAC Channel Controls the Differentiation of Pathogenic B Cells in Lupus Nephritis
This study provides insights into the pathogenic mechanisms of LN and that CRAC channel could serve as a potential therapeutic target for LN.
Source: Frontiers in Immunology - October 22, 2021 Category: Allergy & Immunology Source Type: research

RNA-activated protein kinase differentially modulates innate immune response mediated by supraphysiological concentrations of thyroid hormone.
Abstract Nuclear hormone receptor ligands are known to modulate innate immunity by dampening the immune response induced by pathogens. Here, we report that unlike other ligands, 3,3',5-triiodo-l-thyronine (T3) induced the type 1 IFN response and expression of IFN-stimulated genes (ISGs). T3 action was found to be significantly amplified at supraphysiological concentrations (SPC) and in combination with double-stranded RNA mimic polyinosinic-polycytidylic acid. Induction by T3 was due to non-genomic mechanisms involving integrin binding, calcium mobilization, and phosphatidyl-inositol 3-kinase-AKT pathways, but was...
Source: Innate Immunity - September 12, 2020 Category: Allergy & Immunology Authors: Ishaq M, Natarajan V Tags: Innate Immun Source Type: research

TRPM2 channel regulates cytokines production in astrocytes and aggravates brain disorder during lipopolysaccharide-induced endotoxin sepsis.
Abstract Sepsis is one of the most significant challenges in intensive care units, which is associated with increased morbidity and mortality. Sepsis-associated encephalopathy (SAE) is a severe complication which can cause death and serious disabilities. Calcium signaling in astrocyte is essential for cellular activation and the potential resolution of infection or inflammation in SAE patients. The transient receptor potential melastatin 2 (TRPM2) channel has been identified as a unique fusion of a Ca2+-permeable nonselective cation channel, which plays an important role in inflammation and immune response. Becaus...
Source: International Immunopharmacology - August 21, 2019 Category: Allergy & Immunology Authors: Zhu T, Zhao Y, Hu H, Zheng Q, Luo X, Ling Y, Ying Y, Shen Z, Jiang P, Shu Q Tags: Int Immunopharmacol Source Type: research

Melatonin Attenuates LPS-Induced Acute Depressive-Like Behaviors and Microglial NLRP3 Inflammasome Activation Through the SIRT1/Nrf2 Pathway
Inflammation is a crucial component of various stress-induced responses that contributes to the pathogenesis of major depressive disorder (MDD). Depressive-like behavior (DLB) is characterized by decreased mobility and depressive behavior that occurs in systemic infection induced by Lipopolysaccharide (LPS) in experimental animals and is considered as a model of exacerbation of MDD. We assessed the effects of melatonin on behavioral changes and inflammatory cytokine expression in hippocampus of mice in LPS-induced DLB, as well as its effects on NLR Family Pyrin Domain Containing 3 (NLRP3) inflammasome activation, oxidative...
Source: Frontiers in Immunology - July 1, 2019 Category: Allergy & Immunology Source Type: research

Naringenin Produces Neuroprotection Against LPS-Induced Dopamine Neurotoxicity via the Inhibition of Microglial NLRP3 Inflammasome Activation
Conclusions: This study demonstrated that NAR targeted microglial NLRP3 inflammasome to protect DA neurons against LPS-induced neurotoxicity. These findings suggest NAR might hold a promising therapeutic potential for PD. Background Parkinson's disease (PD) is the second most prevalent central nervous system (CNS) degenerative disease. It is characterized by slow and progressive loss of dopamine (DA) neurons in the midbrain substantia nigra (SN) with the accumulation of α-synuclein in Lewy bodies and neuritis (1). Although the etiology of PD remains unclear, amounts of studies have suggested that ne...
Source: Frontiers in Immunology - April 30, 2019 Category: Allergy & Immunology Source Type: research

IFIT5 Participates in the Antiviral Mechanisms of Rainbow Trout Red Blood Cells
We described a new defense mechanism based on IFIT5 antiviral activity in nucleated RBCs that appeared to contribute to halting the VHSV infection. This finding sheds light into novel antiviral therapeutics to mitigate the economic losses and social impact caused by viral infections in the aquaculture industry. This work broadens the knowledge of fish nucleated RBCs functions and their role in the immune response to viral infections. Ethics Statement Experimental protocols and methods relating to experimental animals were reviewed and approved by the Animal Welfare Body and the Research Ethics Committee at the University...
Source: Frontiers in Immunology - April 15, 2019 Category: Allergy & Immunology Source Type: research

Oligomeric S100A4 Is Associated With Monocyte Innate Immune Memory and Bypass of Tolerance to Subsequent Stimulation With Lipopolysaccharides
Conclusion: Bypass of tolerance by DAMPs might be a phenomenon as important as TI, since it could explain how chronic inflammation can be maintained in spite of an environment with multiple TLR2/TLR4-ligands. In RA monocytes, a PRDM8-dependent TI mechanism could be responsible for sustained chemokine/cytokines levels. Introduction Monocytes and macrophages play a central role in the pathophysiology of inflammation. For instance, in rheumatoid arthritis (RA), activated monocytes massively infiltrate synovial tissues and produce tumor necrosis factor-α (TNFα) (1–3). Accordingly, therapies aime...
Source: Frontiers in Immunology - April 14, 2019 Category: Allergy & Immunology Source Type: research