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https://www.readbyqxmd.com/read/29665659/suppressive-effect-of-4-hydroxy-2-4-hydroxyphenethyl-isoindoline-1-3-dione-on-ovalbumin-induced-allergic-asthma
#1
Jin Huang, Mingzhi Su, Bo-Kyung Lee, Mee-Jeong Kim, Jee H Jung, Dong-Soon Im
4-Hydroxy-2-(4-hydroxyphenethyl)isoindoline-1,3-dione (PD1) is a synthetic phthalimide derivative of a marine compound. PD1 has peroxisome proliferator-activated receptor (PPAR) γ agonistic and anti-inflammatory effects. This study aimed to investigate the effect of PD1 on allergic asthma using rat basophilic leukemia (RBL)-2H3 mast cells and an ovalbumin (OVA)-induced asthma mouse model. In vitro , PD1 suppressed β-hexosaminidase activity in RBL-2H3 cells. In the OVA-induced allergic asthma mouse model, increased inflammatory cells and elevated Th2 and Th1 cytokine levels were observed in bronchoalveolar lavage fluid (BALF) and lung tissue...
April 18, 2018: Biomolecules & Therapeutics
https://www.readbyqxmd.com/read/29660465/jageum-jung-improves-2-4-dinitrochlorobenzene-induced-atopic-dermatitis-like-skin-lesions-in-mice-and-suppresses-pro-inflammatory-chemokine-production-by-inhibiting-tnf-%C3%AE-ifn-%C3%AE-induced-stat-1-and-nf%C3%AE%C2%BAb-signaling-in-hacat-cells
#2
Ju-Hye Yang, Hyun Ju Do, Esther Lee, Nam-Hui Yim, Won-Kyung Cho, Kwang-Il Park, Jin Yeul Ma
ETHNOPHARMACOLOGICAL RELEVANCE: Jageum-Jung (JGJ) is an oriental herbal formula comprising five herbs (Melaphis chinensis Bell, Cremastra variabilis Nakai, Knoxia valerianoides Thorel, Euphorbia lathyris L., and Moschus moschiferus L.). It has been used for detoxification and treating cancer and inflammatory diseases in China, Japan, and Korea. However, the mechanism of action of JGJ on keratinocyte inflammatory response is poorly understood. AIM OF THE STUDY: In the present study, we investigated the anti-inflammatory mechanism of JGJ and studied the effects of JGJ on atopic dermatitis-like skin lesions in mice...
April 13, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29653408/a-new-flavonoid-from-stellera-chamaejasme-l-stechamone-alleviated-2-4-dinitrochlorobenzene-induced-atopic-dermatitis-like-skin-lesions-in-a-murine-model
#3
Beom-Geun Jo, No-June Park, Jonghwan Jegal, Sangho Choi, Sang Woo Lee, Hang Jin, Su-Nam Kim, Min Hye Yang
Stellera chamaejasme L. (family Thymelaeaceae), also known as 'Langdu', has been traditionally used to treat of skin-related diseases, such as, psoriasis and skin ulcers. The aim of this study was to identify the biologically active component of S. chamaejasme and evaluate its preventive effects on IL-4 and mast cell degranulation in RBL-2H3 cells and on the development of atopic dermatitis (AD) in 2,4-dinitrochlorobenzene (DNCB)-treated SKH-1 hairless mice. A novel flavonoid, genkwanin 5-O-xylosyl(1 → 2)glucoside (named stechamone), and three known compounds (umbelliferone, luteolin, and luteolin-7-O-glucoside) were isolated from the aerial parts of S...
April 10, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29615494/small-molecules-that-inhibit-the-late-stage-of-munc13-4-dependent-secretory-granule-exocytosis-in-mast-cells
#4
Stephen Bruinsma, Declan J James, Melanie Quintana Serrano, Joseph Esquibel, Sang Su Woo, Elle Kielar-Grevstad, Ellen Crummy, Rehan Quraishi, Judy A Kowalchyk, Thomas F J Martin
Ca2+ -dependent secretory granule fusion with the plasma membrane is the final step for the exocytic release of inflammatory mediators, neuropeptides, and peptide hormones. Secretory cells use a similar protein machinery at late steps in the regulated secretory pathway employing protein isoforms from Rab, Sec1/Munc18, Munc13/CAPS, SNARE, and synaptotagmin protein families. However, no small molecule inhibitors of secretory granule exocytosis that target these proteins are currently available, but could have clinical utility...
April 3, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29607997/-anti-inflammatory-effect-of-sacran-on-atopic-dermatitis
#5
Hidetoshi Arima, Keiichi Motoyama, Taishi Higashi, Satoshi Fukushima, Hironobu Ihn
 Atopic dermatitis (AD) is a chronic skin disease characterized by inflammation, pruritus, and eczematous lesions. Recently, sacran, a new polysaccharide isolated from cyanobacterium Aphanothece sacrum (Sur.) OKADA discovered by Suringar in the 19th century, has received considerable attention as a novel biomaterial. Previously, it was reported that sacran exhibits potent anti-inflammatory effects for skin diseases produced by various stimulants with optimum effective concentrations at 0.01% (w/v) and 0.05% (w/v) in rats and mice...
2018: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/29574480/author-correction-pkc-dependent-phosphorylation-of-munc18a-at-ser313-in-activated-rbl-2h3-cells
#6
Pratikshya Adhikari, Hao Xu
Acknowledgements This work was supported by the University of Southern Mississippi Development Grant DE01475, the National Institute of Allergy and Infectious Diseases Grant 1R15AI133430-01, and by the Mississippi INBRE, which was funded by an Institutional Development Award (IDeA) from NIGMS under Grant no. P20GM103476.
March 24, 2018: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/29572144/locust-bean-gum-galactomannan-hydrolyzed-by-thermostable-%C3%AE-d-mannanase-may-reduce-the-secretion-of-pro-inflammatory-factors-and-the-release-of-granule-constituents
#7
Wei-Lin Chen, Huan-Ling Chen, Gui-Wen Guo, Yu-Chun Huang, Cheng-Yu Chen, Yu Tsai, Keh-Feng Huang, Chao-Hsun Yang
Locust bean gum (LBG) galactomannan has been claimed to have applications in the biopharmaceutical field. However, the effects of LBG galactomannan on immunomodulatory aspects are not yet clear. The purpose of this study was to over-express thermostable β-d-mannanase from the thermophilic actinomycete Thermobifida fusca BCRC 19214 using a Pichia pastoris expression system. The maximum intracellular β-d-mannanase activity obtained from the cell-free extract was approximately 40.0 U/mL after 72 h of cultivating a P...
March 20, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29518474/anti-allergy-activities-of-kuji-amber-extract-and-kujigamberol
#8
Miku Maruyama, Miki Kobayashi, Takeshi Uchida, Eisaku Shimizu, Hironori Higashio, Misa Ohno, Shota Uesugi, Ken-Ichi Kimura
Amber is fossilized tree resin and several biologically active compounds were isolated from ambers using the growth-restoring activity of the mutant yeast [Saccharomyces cerevisiae (zds1∆ erg3∆ pdr1∆ pdr3∆)] involving Ca2+ -signal transduction. The aim of this study is to investigate the anti-allergic effect of both the methanol extract of Kuji amber (MEKA) and its main biologically active constituent, kujigamberol (15,20-dinor-5,7,9-labdatrien-18-ol) having activity against the mutant yeast. Both MEKA and kujigamberol inhibited the degranulation of RBL-2H3 cells by stimulation of thapsigargin (Tg) (IC50  = 15...
March 5, 2018: Fitoterapia
https://www.readbyqxmd.com/read/29500751/inhibitory-effect-of-japanese-black-vinegar-on-ige-mediated-degranulation-of-rbl-2h3-cells-and-a-murine-model-of-japanese-cedar-pollinosis
#9
Seiji Awane, Kosuke Nishi, Momoko Ishida, Masanobu Nagano, Kazunori Hashiguchi, Akira Fujii, Takuya Sugahara
Japanese black vinegar (JBV) is a traditional vinegar manufactured with steamed unpolished rice. After screening, beneficial effects of JBV on IgE-mediated allergic responses were found. In this study, acetic acid-free JBV was used to evaluate its antiallergic effects. JBV suppressed degranulation of rat basophilic leukemia RBL-2H3 cells in a dose-dependent manner without cytotoxicity. The inhibitory effect of JBV on the degranulation seemed to be caused by the bioactive ingredients other than proteins, because the activity was not affected by heat treatment or protease digestion...
March 2, 2018: Cytotechnology
https://www.readbyqxmd.com/read/29495393/immunomodulatory-and-inhibitory-effect-of-immulina-%C3%A2-and-immunloges-%C3%A2-in-the-ig-e-mediated-activation-of-rbl-2h3-cells-a-new-role-in-allergic-inflammatory-responses
#10
Kurt Appel, Eduardo Munoz, Carmen Navarrete, Cristina Cruz-Teno, Andreas Biller, Eva Thiemann
Immulina® , a high-molecular-weight polysaccharide extract from the cyanobacterium Arthrospira platensis ( Spirulina ) is a potent activator of innate immune cells. On the other hand, it is well documented that Spirulina exerts anti-inflammatory effects and showed promising effects with respect to the relief of allergic rhinitis symptoms. Taking into account these findings, we decided to elucidate whether Immulina® , and immunLoges® (a commercial available multicomponent nutraceutical with Immulina® as a main ingredient) beyond immune-enhancing effects, might also exert inhibitory effects in the induced allergic inflammatory response and on histamine release from RBL-2H3 mast cells...
February 26, 2018: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29486699/mitochondria-targeted-antioxidant-skq1-10-6%C3%A2-plastoquinonyl-decyltriphenylphosphonium-bromide-inhibits-mast-cell-degranulation-in-vivo-and-in-vitro
#11
M A Chelombitko, O A Averina, T V Vasilyeva, O Yu Pletiushkina, E N Popova, A V Fedorov, B V Chernyak, V S Shishkina, O P Ilinskaya
The therapeutic effect of mitochondria-targeted antioxidant 10-(6´-plastoquinonyl)decyltriphenylphosphonium bromide (SkQ1) in experimental models of acute inflammation and wound repair has been shown earlier. It was suggested that the antiinflammatory activity of SkQ1 is related to its ability to suppress inflammatory activation of the vascular endothelium and neutrophil migration into tissues. Here, we demonstrated that SkQ1 inhibits activation of mast cells (MCs) followed by their degranulation and histamine release in vivo and in vitro...
December 2017: Biochemistry. Biokhimii︠a︡
https://www.readbyqxmd.com/read/29485121/blocking-dephosphorylation-at-serine-120-residue-in-t-snare-snap-23-leads-to-massive-inhibition-in-exocytosis-from-mast-cells
#12
Pieu Naskar, Nilofer Naqvi, Niti Puri
Mast cells (MCs) respond to allergen challenge by release of pre-stored inflammatory mediators from their secretory granules, on cross-linking of Fc(epsilon) receptor I (Fc(epsilon)RI) receptors. The target-SNARE (t-SNARE) SNAP-23 has been shown to play an important role in MC exocytosis and undergoes transient phosphorylation at Serine 95 (S95) and Serine 120 (S120), concomitant with mediator release. During current study we explored the importance of transient nature of phosphorylation at S120 in MC exocytosis...
March 2018: Journal of Biosciences
https://www.readbyqxmd.com/read/29472360/immobilized-fibrinogen-activates-human-platelets-through-gpvi
#13
Pierre H Mangin, Marie-Blanche Onselaer, Nicolas Receveur, Nicolas Le Lay, Alexander T Hardy, Clare Wilson, Ximena Sanchez, Stephane Loyau, Arnaud Dupuis, Amir K Babar, Jeanette Lc Miller, Helen Philippou, Craig E Hughes, Andrew B Herr, Robert As Ariëns, Diego Mezzano, Martine Jandrot-Perrus, Christian Gachet, Steve P Watson
GPVI, a major platelet activation receptor for collagen and fibrin, is considered as a particularly promising safe antithrombotic target. In this study, we show that human GPVI signals upon platelet adhesion to fibrinogen. Full spreading of human platelets on fibrinogen is abolished in platelets from GPVI-deficient patients suggesting that fibrinogen activates platelets through GPVI. While mouse platelets fail to spread on fibrinogen, human-GPVI-transgenic mouse platelets show full spreading and increased Ca2+ signalling through the tyrosine kinase Syk...
February 22, 2018: Haematologica
https://www.readbyqxmd.com/read/29431208/rbl-cells-as-models-for-in-vitro-studies-of-mast-cells-and-basophils
#14
REVIEW
Franco H Falcone, Daniel Wan, Nafal Barwary, Ronit Sagi-Eisenberg
Since their establishment in 1981, RBL-2H3 cells have been widely used as a mast cell (MC) model. Their ability to be easily grown in culture in large amounts, their responsiveness to FcεRI-mediated triggers and the fact that they can be genetically manipulated, have provided advantages over primary MCs, in particular for molecular studies relying on genetic screening. Furthermore, the ability to generate clones that stably express proteins of interest, for example, a human receptor, have marked the RBL cells as an attractive MC model for drug screening...
March 2018: Immunological Reviews
https://www.readbyqxmd.com/read/29427351/allergenicity-of-acrolein-treated-shrimp-tropomyosin-evaluated-using-rbl-2h3-cell-and-mice-model
#15
Liangtao Lv, Lin Hong, Zhenxing Li, Ishfaq Ahmed, Guanzhi Chen
BACKGROUND: Food processing effects could modify the protein functional properties. However, protein was oxidized inevitably by lipid peroxidation during food processing. Acrolein, a primary by-product of lipid peroxidation, could modify the structural and functional properties of protein. The aim of the research is to analyze the effect of acrolein on allergenicity of TM, a major allergen in shrimp. RESULTS: The overall allergenic effects of acrolein treated TM were evaluated using female BALB/c mice and a mediator-releasing RBL-2H3 cell line...
February 10, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29414643/effect-of-peiminine-on-dncb-induced-atopic-dermatitis-by-inhibiting-inflammatory-cytokine-expression-in-vivo-and-in-vitro
#16
Jeong-Min Lim, Bina Lee, Ju-Hee Min, Eun-Young Kim, Jae-Hyun Kim, SooYeon Hong, Jwa-Jin Kim, Youngjoo Sohn, Hyuk-Sang Jung
Peiminine (PMN) is the main component derived from Fritillaria ussuriensis and is used in traditional medicine in East Asia. The aim of this study was to evaluate the effects of PMN on atopic dermatitis (AD) induced by a dinitrochlorobenzene (DNCB) in Balb/c mice. Inflammatory cytokine expression of PMN was investigated in vitro. Eosinophil infiltration and the thickness of DNCB-induced AD mouse skin were measured. The levels of IgE, IL-4, IL-6, IL-13, and TNF-α in the serum were measured by ELISA. The effects of PMN on the transcription level of MAPK and nuclear factor (NF)-κB were evaluated in mouse skin...
February 1, 2018: International Immunopharmacology
https://www.readbyqxmd.com/read/29359345/simultaneous-identification-of-the-anaphylactoid-components-from-traditional-chinese-medicine-injections-using-rat-basophilic-leukemia-2h3-and-laboratory-of-allergic-disease-2-dual-mixed-cell-membrane-chromatography-model
#17
Shengli Han, Yanni Lv, Liyun Kong, Yueming Sun, Jia Fu, Lingjun Li, Langchong He
Traditional Chinese medicine (TCM) has been used for prevention and treatment of various diseases for many decades. TCM injection is a new dosage form, with incidence of anaphylactoid reactions increasing every year. In this study, the rat basophilic leukemia 2H3 (RBL-2H3) and laboratory of allergic disease 2 (LAD2) dual-mixed/CMC was established and was coupled with an HPLC-ESI-IT-TOF-MS system to identify the potential allergenic components in Haqing injection. Cinobufagin, piperine, osthole, praeruptorin A, and schizandrin A were screened from Haqing injection via this coupled system...
January 22, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29355320/polyketides-from-the-deep-sea-derived-fungus-graphostroma-sp-mccc-3a00421-showed-potent-antifood-allergic-activities
#18
Siwen Niu, Qingmei Liu, Jin-Mei Xia, Chun-Lan Xie, Zhu-Hua Luo, Zongze Shao, Guangming Liu, Xian-Wen Yang
To discover antifood allergic components from deep-sea-derived microorganisms, we performed a systematic chemical investigation of the Atlantic hydrothermal fungus Graphostroma sp. MCCC 3A00421. Consequently, nine new (1-9) and 19 known (10-28) polyketides were isolated. The planar structures of the new compounds were elucidated mainly by detailed analysis of their nuclear magnetic resonance and high-resolution electrospray ionization mass spectrometry data, while the absolute configurations were established using the modified Mosher's method in association with electronic circular dichroism spectra...
February 14, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29349649/structure-activity-relationships-of-flavanones-flavanone-glycosides-and-flavones-in-anti-degranulation-activity-in-rat-basophilic-leukemia-rbl-2h3-cells
#19
Toshiro Noshita, Kaori Miura, Kaoru Ikeda, Hidekazu Ouchi, Takuya Matsumoto, Akihiro Tai
The incidence of type I allergies, which are associated with mast cell degranulation and local inflammation, is increasing, and new treatments are needed. To date, structure-activity relationships of flavonoids in their degranulation-inhibiting activity have not been systematically characterized. In the current study, the degranulation-inhibiting activity of a series of flavonoids was evaluated. The following three observations were made: (1) the activity disappears when a sugar moiety is introduced into the A ring of the flavanone; (2) the activity depends on the number of hydroxyl groups on the B ring; (3) the activity is markedly enhanced when a double bond is introduced into the C ring...
March 2018: Journal of Natural Medicines
https://www.readbyqxmd.com/read/29336005/degranulation-inhibitors-from-the-arils-of-myristica-fragrans-in-antigen-stimulated-rat-basophilic-leukemia-cells
#20
Toshio Morikawa, Ikuko Hachiman, Kiyofumi Ninomiya, Hiroki Hata, Kaoru Sugawara, Osamu Muraoka, Hisashi Matsuda
A methanol extract of mace, the aril of Myristica fragrans (Myristicaceae), was found to inhibit the release of β-hexosaminidase, a marker of antigen-IgE-stimulated degranulation in rat basophilic leukemia cells (RBL-2H3, IC50  = 45.7 μg/ml). From the extract, three new 8-O-4' type neolignans, maceneolignans I-K (1-3), were isolated, and the stereostructures of 1-3 were elucidated based on spectroscopic and chemical evidence. Among the isolates, maceneolignans A (5), D (6), and H (8), (-)-(8R)-∆8' -4-hydroxy-3,3',5'-trimethoxy-8-O-4'-neolignan (13), (-)-(8R)-∆8' -3,4,5,3',5'-pentamethoxy-8-O-4'-neolignan (14), (-)-erythro-(7R,8S)-∆8' -7-acetoxy-3,4-methylenedioxy-3',5'-dimethoxy-8-O-4'-neolignan (17), (+)-licarin A (20), nectandrin B (24), verrucosin (25), and malabaricone C (29) were investigated as possible degranulation inhibitors (IC50  = 20...
March 2018: Journal of Natural Medicines
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