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https://www.readbyqxmd.com/read/29225210/inhibitory-role-of-munc13-1-in-antigen-induced-mast-cell-degranulation
#1
Hironori Higashio, Yoh-Ichi Satoh, Tomoyuki Saino
Secretory granules (SGs) of mast cells are lysosome-related organelles that contain various inflammatory molecules such as histamine, which are stored in the cytoplasm. Mast cell degranulation is the regulated exocytosis of SGs in response to external stimuli, such as the antigen-mediated cross-linking of the high-affinity IgE receptor, FcεRI. Upon stimulation, SGs undergo priming to become fusion-competent prior to fusing with the plasma membrane, which is mediated by Munc13-4, one of the five members of the vesicle-priming Munc13 protein family...
2017: Biomedical Research
https://www.readbyqxmd.com/read/29200667/davallia-mariesii-moore-improves-fc%C3%AE%C2%B5ri-mediated-allergic-responses-in-the-rat-basophilic-leukemia-mast-cell-line-rbl-2h3-and-passive-cutaneous-anaphylaxis-in-mice
#2
Hyun Ju Do, Tae Woo Oh, Ju Hye Yang, Kwang Il Park, Jin Yeul Ma
Davallia mariesii Moore (Drynaria rhizome extract (DRE)) is widely known for its efficacy in treating inflammation, arteriosclerosis, and bone injuries. This study evaluated whether treatment with DRE inhibited FcɛRI-mediated allergic responses in the RBL-2H3 mast cells and investigated the early- and late-phase mechanisms by which DRE exerts its antiallergic effects. IgE anti-DNP/DNP-HSA-sensitized RBL-2H3 mast cells were tested for cytotoxicity to DRE, followed by the assessment of β-hexosaminidase release...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29181775/notch-ligand-delta-like1-enhances-degranulation-and-cytokine-production-through-a-novel-notch-dok-1-mapks-pathway-in-vitro
#3
Songsong Jiang, Yifan Da, Shiwen Han, Yahong He, Huilian Che
Food allergy includes sensitization phase and effect phase, and effect cells degranulate and secrete cytokines in the effect phase, causing allergic clinical symptoms. We have demonstrated that Notch signaling plays an important role in the sensitization phase, but its role in effect phases still remains unclear. In this study, we investigated the role of Notch signaling in degranulation and cytokine production of the effect phase response. A RBL-2H3 cell model was used and Notch signaling was induced by priming with Notch ligands...
November 28, 2017: Immunologic Research
https://www.readbyqxmd.com/read/29174973/a-novel-screen-printed-mast-cell-based-electrochemical-sensor-for-detecting-spoilage-bacterial-quorum-signaling-molecules-n-acyl-homoserine-lactones-in-freshwater-fish
#4
Donglei Jiang, Yan Liu, Hui Jiang, Shengqi Rao, Wu Fang, Mangang Wu, Limin Yuan, Weiming Fang
A novel screen-printed cell-based electrochemical sensor was developed to assess bacterial quorum signaling molecules, N-acylhomoserine lactones (AHLs). Screen-printed carbon electrode (SPCE), which possesses excellent properties such as low-cost, disposable and energy-efficient, was modified with multi-walled carbon nanotubes (MWNTs) to improve electrochemical signals and enhance the sensitivity. Rat basophilic leukemia (RBL-2H3) mast cells encapsulated in alginate/graphene oxide (NaAgl/GO) hydrogel were immobilized on the MWNTs/SPCE to serve as recognition element...
November 11, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29172064/propofol-attenuates-myocardial-ischemia-reperfusion-injury-partly-through-inhibition-of-resident-cardiac-mast-cell-activation
#5
Xiaoqian Yu, Xiaotong Sun, Meng Zhao, Yonghao Hou, Jingxin Li, Jingui Yu, Yuedong Hou
Cardiac mast cell activation is involved in the process of myocardial ischemia reperfusion (I/R) injury and exacerbates myocardial infarction. Propofol, an anesthetic with antioxidant property, can reduce myocardial infarct size in I/R injury. The present study was designed to investigate whether propofol can attenuate myocardial I/R injury by inhibiting resident cardiac mast cell activation by a Langendorff model. Thirty rats were randomly assigned to 5 groups (n=6 per group): control group and four test groups (I/R, I/R+compound 48/80, I/R+propofol, I/R+compound 48/80+propofol)...
November 21, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29158156/anti-allergic-effects-of-sesquiterpene-lactones-from-saussurea-costus-falc-lipsch-determined-using-in-vivo-and-in-vitro-experiments
#6
Bo-Kyung Lee, Soo-Jin Park, So-Yeon Nam, Saeromi Kang, Jin Hwang, Seung-Jin Lee, Dong-Soon Im
ETHNOPHARMACOLOGICAL RELEVANCE: Saussurea costus (Falc.) Lipsch. root has been used in Asian traditional medicine for the treatment of asthma, rheumatism, and other conditions. S. costus extracts were shown to alleviate house dust mite-induced atopic-like dermatitis in Nc/Nga mice; besides, sesquiterpene lactones were isolated from S. costus extracts. AIMS OF THE STUDY: We aimed to investigate the effects of sesquiterpene lactones (alantolactone, costunolide, and dehydrocostuslactone) in allergic asthma using female Balb/c mice and rat RBL-2H3 mast cells...
November 17, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29148756/inhibitory-activities-of-compounds-from-the-marine-actinomycete-williamsia-sp-mccc-1a11233-variant-on-ige-mediated-mast-cells-and-passive-cutaneous-anaphylaxis
#7
Yuanyuan Gao, Qingmei Liu, Bo Liu, Chun-Lan Xie, Min-Jie Cao, Xian-Wen Yang, Guang-Ming Liu
Compounds of the deep-sea-derived marine Williamsia sp. MCCC 1A11233 (CDMW), which are secondary metabolites of the actinomycetes, were isolated. In this study, seven kinds of CDMW were found to decrease degranulation and histamine release in immunoglobulin E (IgE)-mediated rat basophilic leukemia (RBL)-2H3 cells. The production of cytokines (tumor necrosis factor-α and interleukin-4) was inhibited by these CDMW in RBL-2H3 cells, and their chemical structures were established mainly based on detailed analysis of their NMR spectra...
November 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29126802/gamma-irradiated-black-ginseng-extract-inhibits-mast-cell-degranulation-and-suppresses-atopic-dermatitis-like-skin-lesions-in-mice
#8
Jung Ae Kang, Ha-Yeon Song, Eui-Hong Byun, Nam-Geun Ahn, Hye-Min Kim, You Ree Nam, Gyeong Hee Lee, Beom-Su Jang, Dae Seong Choi, Dong-Eun Lee, Eui-Baek Byun
Gamma irradiation is able to affect various structural modification and an increase of the biological properties of biomaterials. This study was conducted to investigate the anti-allergenic effect of γ-irradiated black ginseng extract (BGE) using in vitro and in vivo experiments. IgEantigen complex-induced degranulation was measured in RBL-2H3 mast cells. In addition, an anti-atopic dermatitis (AD) test was carried out by spreading γ-irradiated BGE on the dorsal skin of 2,4-dinitrochlorobenzene (DNCB)-induced BALB/c mice...
November 7, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29116752/nonoptical-detection-of-allergic-response-with-a-cell-coupled-gate-field-effect-transistor
#9
Haoyue Yang, Masatoshi Honda, Akiko Saito, Taira Kajisa, Yuhki Yanase, Toshiya Sakata
In this study, we report the label-free and reliable detection of allergic response using a cell-coupled gate field-effect transistor (cell-based FET). Rat basophilic leukemia (RBL-2H3) cells were cultured as a signal transduction interface to induce allergic reaction on the gate oxide surface of the FET, because IgE antibodies, which bind to Fcε receptors at the RBL-2H3 cell membrane, are specifically cross-linked by allergens, resulting in the allergic response of RBL-2H3 cells. In fact, the surface potential at the FET gate decreased owing to secretions such as histamine from the IgE-bound RBL-2H3 cells, which reacted with the allergen...
November 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29066795/a-new-eremophilane-sesquiterpene-from-the-fungus-xylaria-sp-v-27-and-inhibition-activity-against-degranulation-in-rbl-2h3-cells
#10
Abdou Tchoukoua, Takuma Suzuki, Nanang Rudianto Ariefta, Takuya Koseki, Yusuke Okawa, Ken-Ichi Kimura, Yoshihito Shiono
A new eremophilane sesquiterpene, 13,13-dimethoxyintegric acid (1), together with known compound integric acid (2) have been isolated from a fungus, Xylaria sp. V-27, obtained from a dead branch. The structure of 1 was established by means of spectroscopic analyses. 1 and 2 promoted growth restoring activity against the mutant yeast strain (Saccharomyces cerevisiae (zds1Δ erg3Δ pdr1Δ pdr3Δ)) and inhibited degranulation of rat basophilic leukemia RBL-2H3 cells stimulated by immnunoglobulin G + 2,4-dinitrophenylated-bovine serum albumin (IgE+DNP-BSA), thapsigargin and A23187...
October 25, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/29042288/mast-cell-degranulation-and-calcium-influx-are-inhibited-by-an-echinacea-purpurea-extract-and-the-alkylamide-dodeca-2e-4e-dienoic-acid-isobutylamide
#11
Travis V Gulledge, Nicholas M Collette, Emily Mackey, Stephanie E Johnstone, Yasamin Moazami, Daniel A Todd, Adam J Moeser, Joshua G Pierce, Nadja B Cech, Scott M Laster
ETHNOPHARMACOLOGICAL RELEVANCE: Native Americans used plants from the genus Echinacea to treat a variety of different inflammatory conditions including swollen gums, sore throats, skin inflammation, and gastrointestinal disorders. Today, various Echinacea spp. preparations are used primarily to treat upper respiratory infections. AIM OF THE STUDY: The goal of this study was to evaluate the effects of an ethanolic E. purpurea (L) Moench root extract and the alkylamide dodeca-2E,4E-dienoic acid isobutylamide (A15) on mast cells, which are important mediators of allergic and inflammatory responses...
October 14, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29038500/role-of-mast-cells-in-clearance-of-leishmania-through-extracellular-trap-formation
#12
Nilofer Naqvi, Kavita Ahuja, Angamuthu Selvapandiyan, Ranadhir Dey, Hira Nakhasi, Niti Puri
Mast Cells (MCs) are one of the first immune cells encountered by invading pathogens. Their presence in large numbers in the superficial dermis, where Leishmania is encountered, suggests that they may play a critical role in immune responses to Leishmania. In this study the interactions of Leishmania donovani, the causative agent of visceral Leishmaniasis, and Leishmania tropica, the causative agent of cutaneous Leishmaniasis with MCs were studied. Co-culture of Leishmania with Peritoneal Mast Cells (PMCs) from BALB/c mice and Rat Basophilic Leukaemia (RBL-2H3) MCs led to significant killing of L...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29029788/differential-ca-2-mobilization-and-mast-cell-degranulation-by-fc%C3%AE%C2%B5ri-and-gpcr-mediated-signaling
#13
Ying-Chi Chen, Yu-Chung Chang, Heng-Ai Chang, Yu-Shan Lin, Chiung-Wen Tsao, Meng-Ru Shen, Wen-Tai Chiu
Mast cells play a primary role in allergic diseases. During an allergic reaction, mast cell activation is initiated by cross-linking IgE-FcεRI complex by multivalent antigen resulting in degranulation. Additionally, G protein-coupled receptors also induce degranulation upon activation. However, the spatio-temporal relationship between Ca(2+) mobilization and mast cell degranulation is not well understood. We investigated the relationship between oscillations in Ca(2+) level and mast cell degranulation upon stimulation in rat RBL-2H3 cells...
November 2017: Cell Calcium
https://www.readbyqxmd.com/read/28983637/pkc-dependent-phosphorylation-of-munc18a-at-ser313-in-activated-rbl-2h3-cells
#14
Pratikshya Adhikari, Hao Xu
Protein Kinase C (PKC) regulates the release of pro-inflammatory compounds from IgE/antigen-activated mast cells by unknown mechanisms. In this study, we show for the first time that PKC inhibitor Ro-03-0432, which inhibits RBL-2H3 exocytosis/degranulation in a concentration-dependent fashion, prevents the phosphorylation of membrane fusion factor Munc18a at Ser 313. Our study provides fresh evidence that PKC-dependent protein phosphorylation may contribute to the intricate regulation of mast cell degranulation by directly targeting the fusion factors...
October 5, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/28959670/is-andrographis-paniculata-extract-and-andrographolide-anaphylactic
#15
Edwin Jothie Richard, Sasikumar Murugan, Bharathi Bethapudi, Ramanaiah Illuri, Deepak Mundkinajeddu, Chandrasekaran Chinampudur Velusami
Andrographis paniculata, "King of bitters" is a popularly known medicinal plant extensively used in many parts of the world for treatment of various diseases. Since recent past, anaphylactic/allergic type adverse events were reported upon A. paniculata usage, the study aimed to evaluate the anaphylactic and anaphylactoid potential of A. paniculata extract and andrographolide (a major phytoactive of A. paniculata). The anaphylactic potential was evaluated using active systemic anaphylaxis (ASA) assay in guinea pigs...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/28919488/mast-cells-derived-from-human-induced-pluripotent-stem-cells-are-useful-for-allergen-tests
#16
Akira Igarashi, Yasuhiro Ebihara, Tomoaki Kumagai, Hiroyuki Hirai, Kinya Nagata, Kohichiro Tsuji
BACKGROUND: Several methods have been developed to detect allergen-specific IgE in sera. The passive IgE sensitization assay using human IgE receptor-expressing rat cell line RBL-2H3 is a powerful tool to detect biologically active allergen-specific IgE in serum samples. However, one disadvantage is that RBL-2H3 cells are vulnerable to high concentrations of human sera. Only a few human cultured cell lines are easily applicable to the passive IgE sensitization assay. However, the use of human induced pluripotent stem cells (iPSCs) to generate human mast cells (MCs) has not yet been reported...
September 14, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28891650/asiaticoside-mitigates-the-allergic-inflammation-by-abrogating-the-degranulation-of-mast-cells
#17
Jing Zhi Jiang, Jing Ye, Guang Yu Jin, Hong Mei Piao, Hong Cui, Ming Yu Zheng, Jin Shi Yang, Nan Che, Yun Ho Choi, Liang Chang Li, Guang Hai Yan
The effects of asiaticoside (AS) on allergic responses mediated by mast cells were investigated. AS showed no obvious cytotoxicity on RPMCs (rat peritoneal mast cells). AS reduced the intracellular calcium in RPMCs and deprived the histamine release and degranulation. AS also decreased the generation of antigen-induced tumor necrosis factor α, interleukin (IL)-4, IL-8, and IL-1β in RBL-2H3 cells sensitized by IgE. The suppression of AS on pro-inflammatory cytokines was related with the activation of the intracellular FcεRI and the inhibition of the nuclear factor-κB signaling pathway...
September 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28876919/cirsium-maritimum-makino-inhibits-the-antigen-immunoglobulin-e-mediated-allergic-response-in-vitro-and-in-vivo
#18
Mamoru Tanaka, Masanobu Suzuki, Yuichiro Takei, Takeaki Okamoto, Hiroyuki Watanabe
We investigated whether Cirsium maritimum Makino can inhibit immunoglobulin-E-mediated allergic response in rat basophilic leukemia (RBL-2H3) cells and passive cutaneous anaphylaxis (PCA) in BALB/c mice. In vitro, the ethyl acetate extract of C. maritimum Makino (ECMM) significantly inhibited β-hexosaminidase release and decreased intracellular Ca(2+) levels in RBL-2H3 cells. Moreover, ECMM leaves more strongly suppressed the release of β-hexosaminidase than ECMM flowers. ECMM leaves also significantly suppressed the PCA reaction in the murine model...
September 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28864210/inhibition-of-the-mevalonate-pathway-by-simvastatin-interferes-with-mast-cell-degranulation-by-disrupting-the-interaction-between-rab27a-and-double-c2-alpha-proteins
#19
Muhammad Novrizal Abdi Sahid, Shuang Liu, Takeshi Kiyoi, Kazutaka Maeyama
Statins are well-known inhibitors of 3-hydroxy-3-methylglutaryl-coenzyme A (HMG-CoA) reductase, which block the mevalonate pathway. The activity of statins not only decreases cholesterol levels but also ameliorates inflammation and modulates the immune system. In this study, we investigated the effects of simvastatin on histamine release using rat basophilic leukaemia (RBL-2H3) cells, and examined its interaction with proteins involved in the exocytosis process. Treatment with simvastatin for 24h inhibited histamine release in RBL-2H3 cells in a concentration-dependent manner after stimulation with dinitrophenylated bovine serum albumin (DNP-BSA, as an antigen), ionomycin (a calcium ion [Ca(2+)] ionophore), and thapsigargin (an inhibitor of Ca(2+)-ATPase in the endoplasmic reticulum)...
November 5, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28827521/dysivillosins-a-d-unusual-anti-allergic-meroterpenoids-from-the-marine-sponge-dysidea-villosa
#20
Wei-Hua Jiao, Bao-Hui Cheng, Guo-Hua Shi, Guo-Dong Chen, Bin-Bin Gu, Yong-Jun Zhou, Li-Li Hong, Fan Yang, Zhi-Qiang Liu, Shu-Qi Qiu, Zhi-Gang Liu, Ping-Chang Yang, Hou-Wen Lin
Four unusual meroterpenoids, dysivillosins A-D (1-4), were isolated from an organic extract of the marine sponge Dysidea villosa collected from the South China Sea. Their planar structures were determined by 1D and 2D NMR and HRESIMS techniques, while the relative and absolute configurations were elucidated by NOESY experiments and comparison between the calculated and experimental ECD spectra. To the best of our knowledge, dysivillosins A-D are the first examples of terpene-polyketide-pyridine hybrid metabolites from the nature...
August 21, 2017: Scientific Reports
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