scholarly journals Viridicatol Isolated from Deep-Sea Penicillium Griseofulvum Alleviates Anaphylaxis and Repairs the Intestinal Barrier in Mice by Suppressing Mast Cell Activation

Marine Drugs ◽  
2020 ◽  
Vol 18 (10) ◽  
pp. 517
Author(s):  
Zhendan Shu ◽  
Qingmei Liu ◽  
Cuiping Xing ◽  
Yafen Zhang ◽  
Yu Zhou ◽  
...  
Keyword(s):  
Mast Cell ◽  
Mouse Model ◽  
Deep Sea ◽  
Cell Activation ◽  
Immunoglobulin E ◽  
Cell Model ◽  
Intestinal Barrier ◽  
Interleukin 10 ◽  
Mast Cell Activation ◽  
Penicillium Griseofulvum

Viridicatol is a quinoline alkaloid isolated from the deep-sea-derived fungus Penicillium griseofulvum. The structure of viridicatol was unambiguously established by X-ray diffraction analysis. In this study, a mouse model of ovalbumin-induced food allergy and the rat basophil leukemia (RBL)-2H3 cell model were established to explore the anti-allergic properties of viridicatol. On the basis of the mouse model, we found viridicatol to alleviate the allergy symptoms; decrease the levels of specific immunoglobulin E, mast cell protease-1, histamine, and tumor necrosis factor-α; and promote the production of interleukin-10 in the serum. The treatment of viridicatol also downregulated the population of B cells and mast cells (MCs), as well as upregulated the population of regulatory T cells in the spleen. Moreover, viridicatol alleviated intestinal villi injury and inhibited the degranulation of intestinal MCs to promote intestinal barrier repair in mice. Furthermore, the accumulation of Ca2+ in RBL-2H3 cells was significantly suppressed by viridicatol, which could block the activation of MCs. Taken together, these data indicated that deep-sea viridicatol may represent a novel therapeutic for allergic diseases.

scholarly journals Anti-Allergic Potential of Cinnamaldehyde via the Inhibitory Effect of Histidine Decarboxylase (HDC) Producing Klebsiella pneumonia

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5580
Author(s):  
Lorina I. Badger-Emeka ◽  
Promise Madu Emeka ◽  
Krishnaraj Thirugnanasambantham ◽  
Hairul Islam M. Ibrahim
Keyword(s):  
Mast Cell ◽  
Cell Activation ◽  
Histidine Decarboxylase ◽  
Cell Model ◽  
In Vitro Study ◽  
Inhibitory Effect ◽  
Mast Cell Activation ◽  
Klebsiella Pneumonia ◽  
Immunological Disorder

Allergy is an immunological disorder that develops in response to exposure to an allergen, and histamines mediate these effects via histidine decarboxylase (HDC) activity at the intracellular level. In the present study, we developed a 3D model of Klebsiella pneumoniae histidine decarboxylase (HDC) and analyzed the HDC inhibitory potential of cinnamaldehyde (CA) and subsequent anti-allergic potential using a bacterial and mammalian mast cell model. A computational and in vitro study using K. pneumonia revealed that CA binds to HDC nearby the pyridoxal-5′-phosphate (PLP) binding site and inhibited histamine synthesis in a bacterial model. Further study using a mammalian mast cell model also showed that CA decreased the levels of histamine in the stimulated RBL-2H3 cell line and attenuated the release of β-hexoseaminidase and cell degranulation. In addition, CA treatment also significantly suppressed the levels of pro-inflammatory cytokines TNF-α and IL-6 and the nitric oxide (NO) level in the stimulated mast cells. A gene expression and Western blotting study revealed that CA significantly downregulated the expressions of MAPKp38/ERK and its downstream pro-allergic mediators that are involved in the signaling pathway in mast cell cytokine synthesis. This study further confirms that CA has the potential to attenuate mast cell activation by inhibiting HDC and modifying the process of allergic disorders.

scholarly journals The Role Played by Mitochondria in FcεRI-Dependent Mast Cell Activation

2020 ◽  
Vol 11 ◽  
Author(s):  
Maria A. Chelombitko ◽  
Boris V. Chernyak ◽  
Artem V. Fedorov ◽  
Roman A. Zinovkin ◽  
Ehud Razin ◽  
...  
Keyword(s):  
Mast Cell ◽  
Transcription Factors ◽  
Mast Cells ◽  
Cell Activation ◽  
Immunoglobulin E ◽  
Mitochondrial Dynamics ◽  
Allergic Diseases ◽  
Mast Cell Activation ◽  
Basic Knowledge ◽  
Mitochondrial Activity

Mast cells play a key role in the regulation of innate and adaptive immunity and are involved in pathogenesis of many inflammatory and allergic diseases. The most studied mechanism of mast cell activation is mediated by the interaction of antigens with immunoglobulin E (IgE) and a subsequent binding with the high-affinity receptor Fc epsilon RI (FcεRI). Increasing evidences indicated that mitochondria are actively involved in the FcεRI-dependent activation of this type of cells. Here, we discuss changes in energy metabolism and mitochondrial dynamics during IgE-antigen stimulation of mast cells. We reviewed the recent data with regards to the role played by mitochondrial membrane potential, mitochondrial calcium ions (Ca2+) influx and reactive oxygen species (ROS) in mast cell FcεRI-dependent activation. Additionally, in the present review we have discussed the crucial role played by the pyruvate dehydrogenase (PDH) complex, transcription factors signal transducer and activator of transcription 3 (STAT3) and microphthalmia-associated transcription factor (MITF) in the development and function of mast cells. These two transcription factors besides their nuclear localization were also found to translocate in to the mitochondria and functions as direct modulators of mitochondrial activity. Studying the role played by mast cell mitochondria following their activation is essential for expanding our basic knowledge about mast cell physiological functions and would help to design mitochondria-targeted anti-allergic and anti-inflammatory drugs.

Intestinal CRF Receptor Subtypes Mediate Distinct Intestinal Barrier Function Responses Through Intestinal Mast Cell Activation

2011 ◽  
Vol 140 (5) ◽  
pp. S-649
Author(s):  
Elizabeth L. Overman ◽  
Jean E. Rivier ◽  
Adam J. Moeser
Keyword(s):  
Mast Cell ◽  
Barrier Function ◽  
Cell Activation ◽  
Intestinal Barrier ◽  
Mast Cell Activation ◽  
Intestinal Barrier Function ◽  
Receptor Subtypes

scholarly journals Ethanol Extract of Sesamum indicum Linn. Inhibits FcεRI-Mediated Allergic Reaction via Regulation of Lyn/Syk and Fyn Signaling Pathways in Rat Basophilic Leukemic RBL-2H3 Mast Cells

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Hyun Ju Do ◽  
Tae Woo Oh ◽  
Kwang-Il Park
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Signaling Pathways ◽  
Inflammatory Mediators ◽  
Cell Activation ◽  
Immunoglobulin E ◽  
Sesamum Indicum ◽  
Mast Cell Activation ◽  
Allergic Reactions ◽  
Potent Effect

This study is aimed at determining whether Sesamum indicum Linn. beneficially influences FcεRI-mediated allergic reactions in RBL-2H3 mast cells; it is also aimed at further investigating Lyn/Fyn and Syk signaling pathways. To examine the antiallergic effect of Sesamum indicum Linn. extract (SIE), we treated antigen/immunoglobulin E- (IgE-) sensitized mast cells with extracts of various concentrations. We examined the degranulation release and concentrations of inflammatory mediators. Additionally, the expressions of genes involved in the FcεRI and arachidonate signaling pathways were examined. SIE inhibited the degranulation and secretion of inflammatory mediators in antigen/IgE-sensitized mast cells. SIE reduced the expressions of FcεRI signaling-related genes, such as Syk, Lyn, and Fyn, and the phosphorylation of extracellular signal-regulated kinase in antigen/IgE-sensitized mast cells. Additionally, in late allergic responses, SIE reduced PGD2 release and COX-2 and cPLA2 phosphorylation expression in FcεRI-mediated mast cell activation. Lastly, 250–500 mg/kg SIE significantly attenuated the Ag/IgE-induced passive cutaneous anaphylaxis (PCA) reaction in mice. The potent effect of SIE on RBL-2H3 mast cell activation indicates that the extract could potentially be used as a novel inhibitor against allergic reactions.

scholarly journals IgE Enhances Mouse Mast Cell FcεRI Expression In Vitro and In Vivo: Evidence for a Novel Amplification Mechanism in IgE-dependent Reactions

1997 ◽  
Vol 185 (4) ◽  
pp. 663-672 ◽  
Author(s):  
Masao Yamaguchi ◽  
Chris S. Lantz ◽  
Hans C. Oettgen ◽  
Ildy M. Katona ◽  
Tony Fleming ◽  
...  
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Cell Activation ◽  
Immunoglobulin E ◽  
Specific Antigen ◽  
Mast Cell Activation ◽  
Proinflammatory Mediators ◽  
Mouse Mast Cell

The binding of immunoglobulin E (IgE) to high affinity IgE receptors (FcεRI) expressed on the surface of mast cells primes these cells to secrete, upon subsequent exposure to specific antigen, a panel of proinflammatory mediators, which includes cytokines that can also have immunoregulatory activities. This IgE- and antigen-specific mast cell activation and mediator production is thought to be critical to the pathogenesis of allergic disorders, such as anaphylaxis and asthma, and also contributes to host defense against parasites. We now report that exposure to IgE results in a striking (up to 32-fold) upregulation of surface expression of FcεRI on mouse mast cells in vitro or in vivo. Moreover, baseline levels of FcεRI expression on peritoneal mast cells from genetically IgE-deficient (IgE −/−) mice are dramatically reduced (by ∼83%) compared with those on cells from the corresponding normal mice. In vitro studies indicate that the IgE-dependent upregulation of mouse mast cell FcεRI expression has two components: an early cycloheximide-insensitive phase, followed by a later and more sustained component that is highly sensitive to inhibition by cycloheximide. In turn, IgE-dependent upregulation of FcεRI expression significantly enhances the ability of mouse mast cells to release serotonin, interleukin-6 (IL-6), and IL-4 in response to challenge with IgE and specific antigen. The demonstration that IgE-dependent enhancement of mast cell FcεRI expression permits mast cells to respond to antigen challenge with increased production of proinflammatory and immunoregulatory mediators provides new insights into both the pathogenesis of allergic diseases and the regulation of protective host responses to parasites.

IgE alone-induced actin assembly modifies calcium signaling and degranulation in RBL-2H3 mast cells

2004 ◽  
Vol 286 (2) ◽  
pp. C256-C263 ◽  
Author(s):  
Tatsuya Oka ◽  
Masatoshi Hori ◽  
Akane Tanaka ◽  
Hiroshi Matsuda ◽  
Hideaki Karaki ◽  
...  
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Cell Activation ◽  
De Novo ◽  
Immunoglobulin E ◽  
Cytochalasin D ◽  
Mast Cell Activation ◽  
Actin Dynamics ◽  
Actin Assembly ◽  
Filamentous Actin

In the mast cell signaling pathways, the binding of immunoglobulin E (IgE) to FcϵRI, its high-affinity receptor, is generally thought to be a passive step. In this study, we examined the effect of IgE alone, that is, without antigen stimulation, on the degranulation in mast cells. Monomeric IgE (500–5,000 ng/ml) alone increased cytosolic Ca2+ level ([Ca2+]i) and induced degranulation in rat basophilic leukemia (RBL)-2H3 mast cells. Monomeric IgE (5,000 ng/ml) alone also increased [Ca2+]i and induced degranulation in bone marrow-derived mast cells. Interestingly, monomeric IgE (5–50 ng/ml) alone, in concentrations too low to induce degranulation, increased filamentous actin content in RBL-2H3 mast cells. We next examined whether actin dynamics affect the IgE alone-induced RBL-2H3 mast cell activation pathways. Cytochalasin D inhibited the ability of IgE alone (50 ng/ml) to induce de novo actin assembly. In cytochalasin D-treated cells, IgE (50 ng/ml) alone increased [Ca2+]i and induced degranulation. We have summarized the current findings into two points. First, IgE alone increases [Ca2+]i and induces degranulation in mast cells. Second, IgE, at concentrations too low to increase either [Ca2+]i or degranulation, significantly induces actin assembly, which serves as a negative feedback control in the mast cell Ca2+ signaling and degranulation.

scholarly journals 20(S)-Protopanaxatriol inhibits release of inflammatory mediators in immunoglobulin E-mediated mast cell activation

2015 ◽  
Vol 39 (3) ◽  
pp. 189-198 ◽  
Author(s):  
Dae Yong Kim ◽  
Jai Youl Ro ◽  
Chang Ho Lee
Keyword(s):  
Mast Cell ◽  
Inflammatory Mediators ◽  
Cell Activation ◽  
Immunoglobulin E ◽  
Mast Cell Activation

scholarly journals Recent advances in mast cell activation and regulation

F1000Research ◽  
2020 ◽  
Vol 9 ◽  
pp. 196 ◽  
Author(s):  
Hwan Soo Kim ◽  
Yu Kawakami ◽  
Kazumi Kasakura ◽  
Toshiaki Kawakami
Keyword(s):  
Mast Cell ◽  
Mast Cells ◽  
Cell Activation ◽  
De Novo ◽  
Immunoglobulin E ◽  
Secretory Granules ◽  
Structural Features ◽  
Mast Cell Activation ◽  
Dependent Manner ◽  
Drug Induced

Mast cells are innate immune cells that intersect with the adaptive immunity and play a crucial role in the initiation of allergic reactions and the host defense against certain parasites and venoms. When activated in an allergen- and immunoglobulin E (IgE)-dependent manner, these cells secrete a large variety of allergenic mediators that are pre-stored in secretory granules or de novo–synthesized. Traditionally, studies have predominantly focused on understanding this mechanism of mast cell activation and regulation. Along this line of study, recent studies have shed light on what structural features are required for allergens and how IgE, particularly anaphylactic IgE, is produced. However, the last few years have seen a flurry of new studies on IgE-independent mast cell activation, particularly via Mrgprb2 (mouse) and MRGPRX2 (human). These studies have greatly advanced our understanding of how mast cells exert non-histaminergic itch, pain, and drug-induced pseudoallergy by interacting with sensory neurons. Recent studies have also characterized mast cell activation and regulation by interleukin-33 (IL-33) and other cytokines and by non-coding RNAs. These newly identified mechanisms for mast cell activation and regulation will further stimulate the allergy/immunology community to develop novel therapeutic strategies for treatment of allergic and non-allergic diseases.

scholarly journals Impairment of the Intestinal Barrier by Ethanol Involves Enteric Microflora and Mast Cell Activation in Rodents

2006 ◽  
Vol 168 (4) ◽  
pp. 1148-1154 ◽  
Author(s):  
Laurent Ferrier ◽  
Florian Bérard ◽  
Laurent Debrauwer ◽  
Chantal Chabo ◽  
Philippe Langella ◽  
...  
Keyword(s):  
Mast Cell ◽  
Cell Activation ◽  
Intestinal Barrier ◽  
Mast Cell Activation
Sign in / Sign up

Export Citation Format

Share Document