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https://www.readbyqxmd.com/read/28074390/anti-allergic-triterpenes-isolated-from-olive-milled-waste
#1
Asuka Kishikawa, Yhiya Amen, Kuniyoshi Shimizu
The degranulation of basophils stimulated by antigen is one of the allergic mechanisms of immediate hypersensitivity reactions. In a previous study, the β-hexosaminidase release of rat basophilic leukemia (RBL-2H3) cells stimulated by IgE cross-linking was specifically inhibited by ethanol extract of olive milled waste (OMW). OMW is a potential source of triterpenes, which show several biological activities. However, little is known about the effect of triterpenes in OMW on β-hexosaminidase release. Here we investigated anti-allergic triterpenes from the ethanol extract of OMW, and we discuss the structure-activity relationship...
January 10, 2017: Cytotechnology
https://www.readbyqxmd.com/read/28036032/inhibitory-effects-of-viscum-coloratum-extract-on-ige-antigen-activated-mast-cells-and-mast-cell-derived-inflammatory-mediator-activated-chondrocytes
#2
Jae-Myung Yoo, Ju-Hye Yang, Young Soo Kim, Hye Jin Yang, Won-Kyung Cho, Jin Yeul Ma
The accumulation and infiltration of mast cells are found in osteoarthritic lesions in humans and rodents. Nonetheless, the roles of mast cells in osteoarthritis are almost unknown. Although Viscum coloratum has various beneficial actions, its effect on allergic and osteoarthritic responses is unknown. In this study, we established an in vitro model of mast cell-mediated osteoarthritis and investigated the effect of the ethanol extract of Viscum coloratum (VEE) on IgE/antigen (IgE/Ag)-activated mast cells and mast cell-derived inflammatory mediator (MDIM)-stimulated chondrocytes...
December 28, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28005305/5-nm-silver-nanoparticles-amplify-clinical-features-of-atopic-dermatitis-in-mice-by-activating-mast-cells
#3
HanGoo Kang, Seungjae Kim, Kwang Hoon Lee, Shan Jin, Seo Hyeong Kim, Kangtaek Lee, Hyungjoon Jeon, Young-Geon Song, Sang-Won Lee, Jinwon Seo, Soomin Park, In-Hong Choi
The triggering effect of silver nanoparticles (NPs) on the induction of allergic reactions is evaluated, by studying the activation of mast cells and the clinical features of atopic dermatitis in a mouse model. Granule release is induced in RBL-2H3 mast cells by 5 nm, but not 100 nm silver NPs. Increases in the levels of reactive oxygen species (hydrogen peroxide and mitochondrial superoxide) and intracellular Ca(++) in mast cells are induced by 5 nm silver NPs. In a mouse model of atopic dermatitis induced by a mite allergen, the skin lesions are more severe and appear earlier in mice treated simultaneously with 5 nm silver NPs and allergen compared with mice treated with allergen alone or 100 nm silver NPs and allergen...
December 22, 2016: Small
https://www.readbyqxmd.com/read/28004830/fluid-flow-facilitates-inward-rectifier-k-current-by-convectively-restoring-k-at-the-cell-membrane-surface
#4
Jae Gon Kim, Sang Woong Park, Doyoung Byun, Wahn Soo Choi, Dong Jun Sung, Kyung Chul Shin, Hyun-Ji Kim, Young-Eun Leem, Jong-Sun Kang, Hana Cho, Bokyung Kim, Sung I Cho, Young Min Bae
The inward rectifier Kir2.1 current (IKir2.1) was reported to be facilitated by fluid flow. However, the mechanism underlying this facilitation remains uncertain. We hypothesized that during K(+) influx or efflux, [K(+)] adjacent to the outer mouth of the Kir2.1 channel might decrease or increase, respectively, compared with the average [K(+)] of the bulk extracellular solution, and that fluid flow could restore the original [K(+)] and result in the apparent facilitation of IKir2.1. We recorded the IKir2.1 in RBL-2H3 cells and HEK293T cells that were ectopically over-expressed with Kir2...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27998689/plasma-membrane-organization-and-dynamics-is-probe-and-cell-line-dependent
#5
Shuangru Huang, Shi Ying Lim, Anjali Gupta, Nirmalya Bag, Thorsten Wohland
The action and interaction of membrane receptor proteins take place within the plasma membrane. The plasma membrane, however, is not a passive matrix. It rather takes an active role and regulates receptor distribution and function by its composition and the interaction of its lipid components with embedded and surrounding proteins. Furthermore, it is not a homogenous fluid but contains lipid and protein domains of various sizes and characteristic lifetimes which are important in regulating receptor function and signaling...
December 18, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27998003/vitamin-d-contributes-to-mast-cell-stabilization
#6
Zhi-Qiang Liu, Xiao-Xi Li, Shu-Qi Qiu, Yong Yu, Mao-Gang Li, Li-Tao Yang, Lin-Jing Li, Shuai Wang, Peng-Yuan Zheng, Zhi-Gang Liu, Ping-Chang Yang
BACKGROUND AND AIMS: Mast cells are the major effector cells in allergic disorders and many other informatory disorders. The mechanism of mast cell stabilization is not fully understood. Cumulative reports indicate that vitamin D (VitD) contributes to the homeostasis in the body. This study tests a hypothesis that VitD is required in the maintenance of the stability of mast cells. METHODS: The stability of mast cell lines, HMC1 cells, RBL-2H3 cells, p815 cells and mouse bone marrow-derived mast cells (BMMC) was tested in the presence or absence of VitD3...
December 20, 2016: Allergy
https://www.readbyqxmd.com/read/27986566/a-flavanone-derivative-from-the-asian-medicinal-herb-perilla-frutescens-potently-suppresses-ige-mediated-immediate-hypersensitivity-reactions
#7
Rikiya Kamei, Takashi Fujimura, Miki Matsuda, Kotaro Kakihara, Noriko Hirakawa, Kenji Baba, Kazuhisa Ono, Kenji Arakawa, Seiji Kawamoto
Perilla frutescens is a dietary leafy herb consumed as a traditional Japanese condiment as well as used for Chinese medicine with anti-inflammatory activity. Here we report a hitherto-unrecognized P. frutescens phytochemical that potently suppresses IgE-mediated type I hypersensitivity reactions. Structural analysis reveals that the purified anti-allergic compound (Perilla-derived methoxyflavanone, PDMF) is identified as 8-hydroxy-5,7-dimethoxyflavanone. PDMF significantly inhibits IgE-mediated histamine release from RBL-2H3 rat basophilic leukemia cells as compared with those seen in known P...
December 13, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27984711/evaluation-of-anaphylactoid-constituents-in-vitro-and-in-vivo
#8
Yubin Xu, Chunyan Liu, Deqiang Dou, Qiuhong Wang
Natural medicine injections have been widely used in clinics, while adverse reaction reports also have increased rapidly in recent years. To examine the anaphylactoid constituents of natural medicine injections, RBL-2H3 cell degranulation and human serum complement activation models were used to screen the anaphylactoid constituents, and the BN rat model was used to explore the anaphylactoid mechanism of these constituents. The result of an in vitro study showed that the individual compounds of natural medicine injections (chlorogenic acid, hyodeoxycholic acid, cholalic acid, ginkgolic acid, phillyrin, schisandrin B, schisandrin A, puerarin, and tanshinone IIA) and polysaccharide could not induce RBL-2H3 to release histamine and β-hexosaminidase, while proteins Tween-80 and tannic acid were the main anaphylactoid constituents in the natural medicine injections...
February 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/27973568/yessotoxin-a-marine-toxin-exhibits-anti-allergic-and-anti-tumoural-activities-inhibiting-melanoma-tumour-growth-in-a-preclinical-model
#9
Araceli Tobío, Amparo Alfonso, Iris Madera-Salcedo, Luis M Botana, Ulrich Blank
Yessotoxins (YTXs) are a group of marine toxins produced by the dinoflagellates Protoceratium reticulatum, Lingulodinium polyedrum and Gonyaulax spinifera. They may have medical interest due to their potential role as anti-allergic but also anti-cancer compounds. However, their biological activities remain poorly characterized. Here, we show that the small molecular compound YTX causes a slight but significant reduction of the ability of mast cells to degranulate. Strikingly, further examination revealed that YTX had a marked and selective cytotoxicity for the RBL-2H3 mast cell line inducing apoptosis, while primary bone marrow derived mast cells were highly resistant...
2016: PloS One
https://www.readbyqxmd.com/read/27930719/in-vitro-and-in-vivo-anti-allergic-and-anti-inflammatory-effects-of-ebv-a-newly-developed-derivative-of-bee-venom-through-modulation-of-irf3-signaling-pathway-in-a-carrageenan-induced-edema-model
#10
Hwa-Jin Chung, Jinho Lee, Joon-Shik Shin, Me-Riong Kim, Wonil Koh, Min-Jeong Kim, Jae-Woong Lee, Eun Jee Kim, In-Hee Lee, Won Kyung Kim, Yoon Jae Lee, Sang Kook Lee, In-Hyuk Ha
BACKGROUND: Bee venom (BV), a type of toxin extracted from honeybees (Apis mellifera), has been empirically and widely used to treat inflammatory diseases throughout Asia. Essential BV (eBV) was developed by removing phospholipase A2 (PLA2) and histamine to lower occurrence of allergic reaction. This study investigated the anti-allergic and anti-inflammatory activities of eBV in vitro and in vivo and its underlying mechanism of action. METHODS: The anti-inflammatory potential of eBV was assessed in vivo using a carrageenan-induced paw edema model...
2016: PloS One
https://www.readbyqxmd.com/read/27912872/anti-allergic-potential-of-typhonium-blumei-inhibition-of-degranulation-via-suppression-of-pi3k-plc%C3%AE-2-phosphorylation-and-calcium-influx
#11
Michal Korinek, Kuan-Ming Chen, Yu-Han Jiang, Mohamed El-Shazly, Joel Stocker, Chon-Kit Chou, Tsong-Long Hwang, Yang-Chang Wu, Bing-Hung Chen, Fang-Rong Chang
BACKGROUND: Typhonium blumei Nicolson & Sivadasan (Araceae) is a traditional Chinese medicinal herb possessing detumescent, detoxifying, and anti-inflammatory activities. It is used in Taiwan as a folk medicine to treat cancer and inflammatory diseases. Typhonium blumei is usually not distinguished from Typhonium roxburghii Schott and they are commonly used interchangeably. PURPOSE: To evaluate and compare the anti-allergic and anti-inflammatory properties of T...
December 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/27907088/silver-nanoparticle-directed-mast-cell-degranulation-is-mediated-through-calcium-and-pi3k-signaling-independent-of-the-high-affinity-ige-receptor
#12
Nasser B Alsaleh, Indushekhar Persaud, Jared M Brown
Engineered nanomaterial (ENM)-mediated toxicity often involves triggering immune responses. Mast cells can regulate both innate and adaptive immune responses and are key effectors in allergic diseases and inflammation. Silver nanoparticles (AgNPs) are one of the most prevalent nanomaterials used in consumer products due to their antimicrobial properties. We have previously shown that AgNPs induce mast cell degranulation that was dependent on nanoparticle physicochemical properties. Furthermore, we identified a role for scavenger receptor B1 (SR-B1) in AgNP-mediated mast cell degranulation...
2016: PloS One
https://www.readbyqxmd.com/read/27890918/2-hydroxy-3-methoxybenzoic-acid-attenuates-mast-cell-mediated-allergic-reaction-in-mice-via-modulation-of-the-fc%C3%AE%C2%B5ri-signaling-pathway
#13
Yeon-Yong Kim, In-Gyu Je, Min Jong Kim, Byeong-Cheol Kang, Young-Ae Choi, Moon-Chang Baek, Byungheon Lee, Jin Kyeong Choi, Hae Ran Park, Tae-Yong Shin, Soyoung Lee, Seung-Bin Yoon, Sang-Rae Lee, Dongwoo Khang, Sang-Hyun Kim
Mast cells are important effector cells in immunoglobulin (Ig) E-mediated allergic reactions such as asthma, atopic dermatitis and rhinitis. Vanillic acid, a natural product, has shown anti-oxidant and anti-inflammatory activities. In the present study, we investigated the anti-allergic inflammatory effects of ortho-vanillic acid (2-hydroxy-3-methoxybenzoic acid, o-VA) that was a derivative of vanillic acid isolated from Amomum xanthioides. In mouse anaphylaxis models, oral administration of o-VA (2, 10, 50 mg/kg) dose-dependently attenuated ovalbumin-induced active systemic anaphylaxis and IgE-mediated cutaneous allergic reactions such as hypothermia, histamine release, IgE production and vasodilation; administration of o-VA also suppressed the mast cell degranulator compound 48/80-induced anaphylaxis...
January 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/27825531/preliminary-study-on-an-innovative-simple-mast-cell-based-electrochemical-method-for-detecting-foodborne-pathogenic-bacterial-quorum-signaling-molecules-n-acyl-homoserine-lactones
#14
Donglei Jiang, Dongdong Feng, Hui Jiang, Limin Yuan, Yin Yongqi, Xin Xu, Weiming Fang
This paper reports the a novel and simple mast cell-based electrochemical method for detecting of bacterial quorum signaling molecules, N-acylhomoserine lactones (AHLs), which can be utilized to preliminarily evaluate the toxicity of food-borne pathogenic bacteria. Rat basophilic leukemia (RBL-2H3) mast cells encapsulated in alginate/graphene oxide hydrogel were immobilized on a gold electrode, while mast cells as recognition elements were cultured in a 3D cell culture system. Electrochemical impedance spectroscopy (EIS) was utilized to record the cell impedance signal as-influenced by Pseudomonas aeruginosa quorum-sensing molecule, N-3-oxododecanoyl homoserine lactone (3OC12-HSL)...
April 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/27803884/imidacloprid-inhibits-ige-mediated-rbl-2h3-cell-degranulation-and-passive-cutaneous-anaphylaxis
#15
Linbo Shi, Li Zou, Jinyan Gao, Huaing Xu, Xiaoyun Shi, Hongbing Chen
BACKGROUND: Imidacloprid has been commonly used as a pesticide for crop protection and acts as nicotinic acetylcholine receptor agonists. Little information about the relationship between imidacloprid and allergy is available. OBJECTIVE: This study aims to examine the effects of imidacoprid on IgE-mediated mast cell activation. METHODS: The rat basophilic leukemia cell line RBL-2H3 (RBL-2H3 cells) were treated with 10(-3) - 10(-12) mol/L imidacloprid, followed by measuring the mediator production, influx of Ca(2+) in IgE-activated RBL-2H3 cells, and the possible effects of imidacoprid on anti-dinitrophenyl IgE-induced passive cutaneous anaphylaxis (PCA)...
October 2016: Asia Pacific Allergy
https://www.readbyqxmd.com/read/27801804/human-lactobacillus-strains-from-the-intestine-can-suppress-ige-mediated-degranulation-of-rat-basophilic-leukaemia-rbl-2h3-cells
#16
Gaku Harata, Fang He, Kyoko Takahashi, Akira Hosono, Kenji Miyazawa, Kazutoyo Yoda, Masaru Hiramatsu, Shuichi Kaminogawa
Mast cells play a critical role in immunoglobulin E (IgE)-mediated allergic diseases, and the degranulation of mast cells is important in the pathogenesis of these diseases. A disturbance of the intestinal microflora, especially of endogenous lactic acid bacteria, might be a contributing factor for IgE-mediated allergic diseases. Additional knowledge regarding the interaction of human intestinal Lactobacilli with mast cells is still necessary. Twenty-three strains of Lactobacilli, including commercial and reference strains and strains from the human intestine, were tested for their ability to regulate degranulation of cells from rat basophilic leukemia RBL-2H3 cells (RBL-2H3) in vitro based on a β-hexosaminidase release assay...
October 27, 2016: Microorganisms
https://www.readbyqxmd.com/read/27780134/inhibitory-effects-of-norlignans-isolated-from-anemarrhena-asphodeloides-on-degranulation-of-rat-basophilic-leukemia-%C3%A2-2h3cells
#17
Jong Phil Bak, Young Mi Cho, Inhye Kim, Dae Won Park, Jung Eun Kwon, Yong Joon Jeong, Jong Hwan Kwak, Se Chan Kang
Anemarrhena asphodeloides is known to suppress inflammation and lower various fevers. To determine the active component of A. asphodeloides, ethanol (EtOH) extract of A. asphodeloides rhizomes was fractionized. The compounds isolated from the dichloromethane (CH2Cl2) soluble fraction were identified as 4'-O-methylnyasol (1), nyasol (2), 3″-methoxynyasol (3), 3″-hydroxy-4″-methoxy-4″-dehydroxynyasol (4), 4-hydroxybenzaldehyde (5), and 4-hydroxyacetophenone (6). The four norlignans (1-4) potently inhibited the release of β-hexosaminidase from immunoglobulin E (IgE)/dinitrophenol-conjugated bovine serum albumin (DNP-BSA)-treated rat basophilic leukemia (RBL)-2H3 and A23187 plus phorbol 12-myristate 13-acetate co-treated isolated rat primary mast cells, as markers of degranulation and histamine release...
December 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27761061/inhibitory-effect-of-loranthus-parasiticus-on-ige-mediated-allergic-responses-in-rbl-2h3-cells
#18
Jae-Myung Yoo, Ju-Hye Yang, Young Soo Kim, Won-Kyung Cho, Jin Yeul Ma
The mistletoe Loranthus parasiticus has been used as a compound for traditional medicine in Northeast Asia for a long time and is known to possess neuroprotective action. Nonetheless, the effect of Loranthus parasiticus on allergic responses remains unknown. In the present study, we evaluated whether the water extract of Loranthus parasiticus (LPE) could inhibit IgE-mediated allergic responses in RBL-2H3 cells. LPE inhibited the release of β-hexosaminidase (IC50, 184.5 μg/mL) and the formation of tumor necrosis factor-α (IC50, 84...
2016: Mediators of Inflammation
https://www.readbyqxmd.com/read/27759093/live-cell-imaging-of-er-pm-contact-architecture-by-a-novel-tirfm-approach-reveals-extension-of-junctions-in-response-to-store-operated-ca-2-entry
#19
Michael Poteser, Gerd Leitinger, Elisabeth Pritz, Dieter Platzer, Irene Frischauf, Christoph Romanin, Klaus Groschner
Nanometer-spaced appositions between endoplasmic reticulum and plasma membrane (ER-PM junctions) stabilized by membrane-joining protein complexes are critically involved in cellular Ca(2+)-handling and lipid trafficking. ER-PM junctional architecture and plasticity associated with inter-membrane communication are as yet barely understood. Here, we introduce a method to precisely characterize ER-PM junction morphology and dynamics with high temporal resolution and minimal disturbance of junctional intermembrane communication...
October 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27743673/the-anti-allergic-activity-of-lactobacillus-plantarum-l67-and-its-application-to-yogurt
#20
Sooyeon Song, Sei-Jung Lee, Dong-June Park, Sejong Oh, Kye-Taek Lim
Recently, interest in the beneficial role of probiotics in the protection and management of allergic diseases caused by immune disorders has been increasing. This study investigated the inhibitory effect of Lactobacillus plantarum L67 on induced allergic inflammatory response in bisphenol A-treated rat basophilic leukemia 2H3 (RBL-2H3) cells and mouse splenocytes. We also evaluated the applicability of L. plantarum L67 as a yogurt starter culture. We measured the ability of Lactobacillus strains to induce the production of IL-12 and IFN- γ in cultured splenocytes by ELISA...
October 13, 2016: Journal of Dairy Science
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