1,721,044 research outputs found
The relationship between pesticide metabolites and asthma outcomes among women farm workers
No full textIncludes bibliographical references.Various studies have demonstrated an association between exposure to pesticides and adverse respiratory health outcomes including non-specific respiratory symptoms, rhinitis and asthma. Few studies have investigated the relationship between pesticide metabolites and asthma outcomes and only a limited number have explored mechanisms for allergic and non-allergic airway inflammation in individuals exposed to pesticides. A previous sub-study of this group reported an association between allergic airway inflammation as determined by fractional exhaled nitric oxide (FeNO) and low levels of whole blood cholinesterase among women farm workers. The main objective of this study was to investigate the relationship between exposure to different pesticides (ascertained through pesticide metabolites concentrations in urine) and asthma phenotypes (based on respiratory symptoms, cytokine patterns and exhaled nitric oxide profiles) among rural women in the Western Cape Province
Inhibitory effect of quercetin on tryptase and interleukin-6 release, and histidine decarboxylase mRNA transcription by human mast cell-1 cell line
No full textMast cells are involved in inflammatory processes and in allergic reactions where immunologic stimulation leads to degranulation and generation of numerous cytokines and inflammatory mediators. Mast cells have been proposed as an immune gate to the brain, as well as sensors of environmental and emotional stress, and are likely involved in neuropathologic processes such as multiple sclerosis. Among mast cell products, the protease tryptase could be associated with neurodegenerative processes through the activation of specific receptors (PARs) expressed in the brain, while interleukin (IL)-6 likely causes neurodegeneration and exacerbates dysfunction induced by other cytokines; or it could have a protective effect against demyelinisation. In this report we show that quercetin, a natural compound able to act as an inhibitor of mast cell secretion, causes a decrease in the release of tryptase and IL-6 and the down-regulation of histidine decarboxylase (HDC) mRNA from human mast cell (HMC)-1 cells. As quercetin dramatically inhibits mast cell tryptase and IL-6 release and HDC mRNA transcription by HMC-1 cell line, these results nominate quercetin as a therapeutical compound in association with other therapeutical molecules for neurological diseases mediated by mast cell degranulation
Inhibitory effect of quercetin on tryptase and MCP-1 chemokine release, and histidine decarboxylase mRNA transcription by human mast cell-1 cell line
No full textMast cells are important in reactions of allergic disease and are also involved in a variety of neuroinflammatory diseases. Mast cells can be immunologically activated by IgE through their Fc receptors, as well as by neuropeptides and cytokines to secrete mediators. Here we used a human mast cell-1 (HMC-1) cell line cultured and treated with a physiological activator, anti-IgE, and a nonphysiological activator, calcium ionophore A23187, for tryptase and MCP-1 generation and transcription of histidine decarboxylase. We used quercetin, a potent antioxidant, cytoprotective and anti-inflammatory compound capable of inhibiting histamine and some cytokines released from several cell types, as an inhibitor of immunological and nonimmunological stimulus for mast cells. In this study quercetin inhibits, in a dose-response manner, tryptase and MCP-1. Moreover, using RT-PCR quercetin inhibited the transcription of histidine decarboxylase, the rate-limiting enzyme responsible for the generation of histamine from histidine, and MCP-1. Our data suggest that quercetin is an important and good candidate for reducing the release of pro-inflammatory mast cell mediators activated by physiological and nonphysiological stimulato
High levels of intrauterine corticotrophin-releasing hormone, urocortin, tryptase, and interleukin-8 in spontaneous abortions.
No full textRANTES is a pro-inflammatory chemokine and chemoattracts basophil cells to extravascular sites.
No full textMast cell recruitment after subcutaneous injection of RANTES in the sole of the rat paw.
No full text-The effect of hrRANTES was studied after the injection in the sole of the rat paw, an area particularly rich in mast cells. Subcutaneous injections of RANTES 50 ng/10 microl produced an erythematous reaction which was inhibited by anti-RANTES antibody 50 microg/rat injected in the tail vein 30 min before hrRANTES 50 ng/10 microl was injected. In another set of experiments the animals were injected subcutaneously in the sole of the paw with PBS 10 microl (control), LPS (100 ng/10 microl) hrRANTES 50 ng/10 microl or anti-RANTES 50 microl/rat injected in the tail vein 30 min before hrRANTES 50 ng/10 microl was injected. The biopsies were analysed after 4 h and counted in an optic field. hrRANTES produced a strong recruitment of mast cells selectively coloured with 0.1% toluidine blue and inhibited by anti-RANTES antibody. In addition to the optical and electron microscope study, in some of the excised tissue Northern blot analysis for histidine decarboxylase (HDC) mRNA was performed to estimate the amount of histamine generation in the tissue of the injection sites. We found that subcutaneous injections of hrRANTES 50 ng/10 microl in the sole of the rat paw produced an accumulation of a great number of mast cells compared to PBS 10 microl (negative control) or LPS 100 ng/10 microl (positive control) after 4 h. The hrRANTES effect was inhibited by anti-RANTES antibody injected in the tail vein 30 min before hrRANTES exposure. Moreover, hrRANTES increased HDC mRNA and histamine generation
The dark side of mast cells and their role in metastasis
Full text linkKomarowska Marta Diana, Korakiewicz Gabriela, Pilaszewicz Agata, Hermanowicz Adam, Reszec Joanna, Debek Wojciech, Chyczewski Lech. The dark side of mast cells and their role in metastasis. Journal of Health Sciences. 2014;4(14):273-284. ISSN 1429-9623 / 2300-665X.
http://journal.rsw.edu.pl/index.php/JHS/article/view/2014%3B4%2814%29%3A273-284
https://pbn.nauka.gov.pl/works/513198
DOI: 10.5281/zenodo.13372
http://dx.doi.org/10.5281/zenodo.13372
The journal has had 5 points in Ministry of Science and Higher Education of Poland parametric evaluation. Part B item 1107. (17.12.2013).
© The Author (s) 2014;
This article is published with open access at Licensee Open Journal Systems of Radom University in Radom, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium,
provided the original author(s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License
(http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
This is an open access article licensed under the terms of the Creative Commons Attribution Non Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted, non commercial
use, distribution and reproduction in any medium, provided the work is properly cited.
Conflict of interest: None declared. Received: 15.11.2014. Revised 05.12.2014. Accepted: 10.12.2014.
The dark side of mast cells and their role in metastasis
Marta Diana Komarowska1, Gabriela Korakiewicz2, Agata Pilaszewicz2, Adam Hermanowicz1, Joanna Reszec2, Wojciech Debek1, Lech Chyczewski2
Department of Pediatric Surgery, Medical University of Bialystok
Waszyngtona 17
15-274 Bialystok
Department of Medical Pathomorphology, Medical University of Bialystok
Waszyngtona 13
15-269 Bialystok
Poland
Corresponding author
Adam Hermanowicz MD, PhD
Pediatric Surgery Department
Waszyngtona 17
15-274 Bialystok
Tel +48608612288
Email: [email protected]
We confirm that all authors have read and approved the submission of the manuscript, the manuscript has not been published and is not being considered for publication elsewhere, in whole or in part, in any language, except as an abstract. We also declare no financial relationships with any industry (through investments, employment, consultancies, stock ownership, honoraria). The authors declare no conflict of interests.
Word count 4886
Abstract:
Mast cells are one of the best and least understood components of the immune system. They play a crucial role in inflammatory diseases as well as in the promotion of progression of many types of neoplasms. This review covers the most important pathological conditions associated with mast cell activity focusing on inflammatory diseases, e.g. inflammatory bowel disease, chronic pancreatitis, asthma, and mostly on tumor growth and metastases.
Keywords: mast cells, inflammatory diseases, tumor growth, metastases.Komarowska Marta Diana, Korakiewicz Gabriela, Pilaszewicz Agata, Hermanowicz Adam, Reszec Joanna, Debek Wojciech, Chyczewski Lech. The dark side of mast cells and their role in metastasis. Journal of Health Sciences. 2014;4(14):273-284. ISSN 1429-9623 / 2300-665X.
http://journal.rsw.edu.pl/index.php/JHS/article/view/2014%3B4%2814%29%3A273-284
https://pbn.nauka.gov.pl/works/513198
DOI: 10.5281/zenodo.13372
http://dx.doi.org/10.5281/zenodo.1337
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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