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Molecular allergen

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https://www.readbyqxmd.com/read/29157262/immunoproteomic-analysis-of-the-excretory-secretory-products-of-trichinella-pseudospiralis-adult-worms-and-newborn-larvae
#1
Yang Wang, Xue Bai, Haichao Zhu, Xuelin Wang, Haining Shi, Bin Tang, Pascal Boireau, Xuepeng Cai, Xuenong Luo, Mingyuan Liu, Xiaolei Liu
BACKGROUND: The nematode Trichinella pseudospiralis is an intracellular parasite of mammalian skeletal muscle cells and exists in a non-encapsulated form. Previous studies demonstrated that T. pseudospiralis could induce a lower host inflammatory response. Excretory-secretory (ES) proteins as the most important products of host-parasite interaction may play the main functional role in alleviating host inflammation. However, the ES products of T. pseudospiralis early stage are still unknown...
November 21, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29156294/phospholipase-a1-based-cross-reactivity-among-venoms-of-clinically-relevant-hymenoptera-from-neotropical-and-temperate-regions
#2
Amilcar Perez-Riverol, Luís Gustavo Romani Fernandes, Alexis Musacchio Lasa, José Roberto Aparecido Dos Santos-Pinto, Débora Moitinho Abram, Gabriel Hideki Izuka Moraes, Frederic Jabs, Michaela Miehe, Henning Seismman, Mario Sergio Palma, Ricardo de Lima Zollner, Edzard Spillner, Márcia Regina Brochetto-Braga
Molecular cross-reactivity caused by allergen homology or cross-reactive carbohydrate determinants (CCDs) is a major challenge for diagnosis and immunotherapy of insect venom allergy. Venom phospholipases A1 (PLA1s) are classical, mostly non-glycosylated wasp and ant allergens that provide diagnostic benefit for differentiation of genuine sensitizations from cross-reactivity. As CCD-free molecules, venom PLA1s are not causative for CCD-based cross-reactivity. Little is known however about the protein-based cross-reactivity of PLA1 within vespid species...
November 17, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29155102/targeting-of-rac1-prevents-bronchoconstriction-and-airway-hyperresponsiveness
#3
Gwennan André-Grégoire, Florian Dilasser, Julie Chesné, Faouzi Braza, Antoine Magnan, Gervaise Loirand, Vincent Sauzeau
BACKGROUND: The molecular mechanisms responsible for airway smooth muscle cells (aSMC) contraction and proliferation in airway hyperresponsiveness (AHR) associated with asthma are still largely unknown. The small GTPases of the Rho family (RhoA, Rac1 and Cdc42) play a central role in SMC functions including migration, proliferation and contraction. OBJECTIVE: The objective of this study is to identify the role of Rac1 in aSMC contraction and to investigate its involvement in AHR associated with allergic asthma...
November 15, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29153274/-classical-and-molecular-methods-for-identification-and-quantification-of-domestic-moulds
#4
REVIEW
E Fréalle, V Bex, G Reboux, S Roussel, S Bretagne
INTRODUCTION: To study the impact of the constant and inevitable inhalation of moulds, it is necessary to sample, identify and count the spores. BACKGROUND: Environmental sampling methods can be separated into three categories: surface sampling is easy to perform but non quantitative, air sampling is easy to calibrate but provides time limited information, and dust sampling which is more representative of long term exposure to moulds. The sampling strategy depends on the objectives (evaluation of the risk of exposure for individuals; quantification of the household contamination; evaluation of the efficacy of remediation)...
November 15, 2017: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/29125533/sequencing-and-de-novo-assembly-of-the-toxicodendron-radicans-poison-ivy-transcriptome
#5
Alexandra J Weisberg, Gunjune Kim, James H Westwood, John G Jelesko
Contact with poison ivy plants is widely dreaded because they produce a natural product called urushiol that is responsible for allergenic contact delayed-dermatitis symptoms lasting for weeks. For this reason, the catchphrase most associated with poison ivy is "leaves of three, let it be", which serves the purpose of both identification and an appeal for avoidance. Ironically, despite this notoriety, there is a dearth of specific knowledge about nearly all other aspects of poison ivy physiology and ecology...
November 10, 2017: Genes
https://www.readbyqxmd.com/read/29120476/linking-iron-deficiency-with-allergy-role-of-molecular-allergens-and-the-microbiome
#6
REVIEW
Franziska Roth-Walter, Luis F Pacios, Rodolfo Bianchini, Erika Jensen-Jarolim
Atopic individuals tend to develop a Th2 dominant immune response, resulting in hyperresponsiveness to harmless antigens, termed allergens. In the last decade, epidemiological studies have emerged that connected allergy with a deficient iron-status. Immune activation under iron-deficient conditions results in the expansion of Th2-, but not Th1 cells, can induce class-switching in B-cells and hampers the proper activation of M2, but not M1 macrophages. Moreover, many allergens, in particular with the lipocalin and lipocalin-like folds, seem to be capable of binding iron indirectly via siderophores harboring catechol moieties...
November 9, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29118971/local-allergic-rhinitis-evolution-of-concepts
#7
EDITORIAL
Cristoforo Incorvaia, Nicola Fuiano, Irene Martignago, Bruna L Gritti, Erminia Ridolo
The discovery of an exclusive local production of IgE antibodies dates back to the 1970s, but only recently the pathophysiology of such phenomenon was deeply investigated, leading to the concept of local allergic rhinitis (LAR). Currently, LAR is defined by the occurrence, in patients with symptoms clearly suggesting allergic rhinitis but with negative results to common allergy testing, of allergen specific IgE in the nasal mucosa. Most studies investigating LAR were based on the development of rhinitis symptoms following nasal provocation test (NPT) with the suspected allergens, but such test may be performed by a number of options, none of them being as yet acknowledged and recommended in consensus document...
2017: Clinical and Translational Allergy
https://www.readbyqxmd.com/read/29118674/high-frequency-of-ige-sensitization-towards-kiwi-seed-storage-proteins-among-peanut-allergic-individuals-also-reporting-allergy-to-kiwi
#8
Jenny van Odijk, Sigrid Sjölander, Peter Brostedt, Magnus P Borres, Hillevi Englund
Background: IgE sensitization to storage proteins from nuts and seed is often related to severe allergic symptoms. There is a risk of immunological IgE cross-reactivity between storage proteins from different species. The potential clinical implication of such cross-reactivity is that allergens other than the known sensitizer can cause allergic symptoms. Previous studies have suggested that kiwi seed storage proteins may constitute hidden food allergens causing cross-reactive IgE-binding with peanut and other tree nut homologs, thereby mediating a potential risk of causing allergy symptoms among peanut ant tree nut allergic individuals...
2017: Clinical and Molecular Allergy: CMA
https://www.readbyqxmd.com/read/29109963/cytokine-profile-of-patients-with-allergic-rhinitis-caused-by-pollen-mite-and-microbial-allergen-sensitization
#9
Yury A Tyurin, Svetlana A Lissovskaya, Rustem S Fassahov, Ilshat G Mustafin, Anton F Shamsutdinov, Marina A Shilova, Albert A Rizvanov
Allergic rhinitis (AR) is especially prevalent among the population of large cities. Immunologically, the airway epithelium is a region where the population of allergen-presenting cells concentrates. These cells actively express a group of receptors of the innate immune system. A specific cytokine profile is its representation. The study was aimed at evaluating the cytokine profile in patients with seasonal and perennial allergic rhinitis. The cytokine profile of nasal secretion and blood serum of 44 patients with AR was studied...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/29106961/immunological-analysis-of-food-proteins-using-high-performance-thin-layer-chromatography-immunostaining
#10
Lena Morschheuser, Kathrin Mink, Ramona Horst, Constanze Kallinich, Sascha Rohn
The chromatographic analysis of intact proteins is still challenging, especially when biological functions as antigenicity of proteins or peptides are in the focus. Traditional immunoassays provide information about the entirety of antigenic proteins/peptides, e.g., in ELISA assays. On the other hand, when focusing on the investigation of (cross) reactivity of antibodies, Western blot following gel-electrophoresis represents the method of choice. However, gel-electrophoresis is limited by the molecular weight and therefore, not suitable for peptides ≤3kDa or proteins ≥250kDa...
October 20, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29105783/clinical-implications-of-mast-cell-involvement-in-allergic-conjunctivitis
#11
REVIEW
D Elieh Ali Komi, T Rambasek, L Bielory
The conjunctiva is a common site for the allergic inflammatory response due to it being highly vascularized, having constant exposure to environmental pollutants and allergenic pollens and having a unique conjunctival associated lymphoid tissue. The primary morbidity of anterior surface conjunctival disorders that include allergic conjunctivitis and tear film disorders is associated with its high frequency of involvement rather than its severity, although the more chronic forms can involve the cornea and lead to sight-threatening conditions...
November 6, 2017: Allergy
https://www.readbyqxmd.com/read/29102311/environmental-and-molecular-study-of-fungal-flora-in-asthmatic-patients
#12
H Trablesi, I Hadrich, S Neji, N Fendri, D Ghorbel, F Makni, H Ayadi, S Kammoun, A Ayadi
The aim of the present study was to investigate the epidemiological and fungal environmental profile in asthmatic patients. We conducted a prospective study involving 49 patients with allergic asthma. One hundred and forty-five clinical samples and 289 environmental samples were performed. Only 30 patients accepted to participate to the environmental study at their home. For specific IgE antibodies, ELISA assay was conducted for 21 patients. Molecular ITS sequencing was performed for 37 isolates. The frequency of attacks was significantly associated with the seasonality, which was closely related to climate (P=0...
October 25, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/29101472/a-kudoa-septempunctata-antigen-induces-production-of-ige-in-balb-c-mice
#13
Takahiro Ohnishi, Aya Kubo, Tomoya Yoshinari, Maiko Watanabe
Kudoa septempunctata, a myxosporean parasite, is the causative agent of a foodborne illness associated with consumption of raw Paralichthys olivaceus (olive flounder). Because the lag phase of this illness is short (from 1 to 12 h), it is possible that an allergic response is relevant to this illness. To test whether a K. septempunctata antigen is the possible allergen, we injected a myxospore extract into BALB/c mice and measured IgE levels in serum. When the mice were injected with the myxospore extract, the total serum IgE concentration increased significantly after the second immunization as compared to the negative control...
November 3, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29096167/crystal-structure-determination-and-analysis-of-11s-coconut-allergen-cocosin
#14
S Vajravijayan, N Nandhagopal, K Gunasekaran
Allergy is an abnormal immune response against an innocuous target. Food allergy is an adverse reaction caused by common foods most well-known being those involving peanuts. Apart from mono sensitized food allergy, cross-reactivity with other food allergens is also commonly observed. To understand the phenomenon of cross-reactivity related to immune response, three dimensional structures of the allergens and their antigenic epitopes has to be analysed in detail. The X-ray crystal structure of Cocosin, a common 11S food allergen from coconut, has been determined at 2...
October 27, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29089846/production-of-hypoallergenic-antibacterial-peptides-from-defatted-soybean-meal-in-membrane-bioreactor-a-bioprocess-engineering-study-with-comprehensive-product-characterization
#15
Arijit Nath, Gábor Szécsi, Barbara Csehi, Zsuzsa Mednyánszky, Gabriella Kiskó, Éva Bányai, Mihály Dernovics, András Koris
Hypoallergenic antibacterial low-molecular-mass peptides were produced from defatted soybean meal in a membrane bioreactor. In the first step, soybean meal proteins were digested with trypsin in the bioreactor, operated in batch mode. For the tryptic digestion of soybean meal protein, optimum initial soybean meal concentration of 75 g/L, temperature of 40 °C and pH=9.0 were determined. After enzymatic digestion, low-molecular-mass peptides were purified with cross-flow flat sheet membrane (pore size 100 µm) and then with tubular ceramic ultrafiltration membrane (molecular mass cut-off 5 kDa)...
September 2017: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/29089616/exacerbation-of-ventilation-induced-lung-injury-and-inflammation-in-preterm-lambs-by-high-dose-nanoparticles
#16
Ishmael M Inocencio, Robert J Bischof, Sue D Xiang, Valerie A Zahra, Vy Nguyen, Tammy Lim, Domenic LaRosa, Jade Barbuto, Mary Tolcos, Magdalena Plebanski, Graeme R Polglase, Timothy J Moss
Mechanical ventilation of preterm neonates causes lung inflammation and injury, with potential life-long consequences. Inert 50-nm polystyrene nanoparticles (PS50G) reduce allergic inflammation in the lungs of adult mice. We aimed to confirm the anti-inflammatory effects of PS50G in a sheep asthma model, and investigate the effects of prophylactic administration of PS50G on ventilation-induced lung injury (VILI) in preterm lambs. We assessed lung inflammatory cell infiltration, with and without PS50G, after airway allergen challenge in ewes sensitised to house dust mite...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29069944/photosensitive-drugs-a-review-on-their-photoprotection-by-liposomes-and-cyclodextrins
#17
Giuseppina Ioele, Michele De Luca, Antonio Garofalo, Gaetano Ragno
Nowadays, an exciting challenge in the drug chemistry and technology research is represented by the development of methods aimed to protect molecular integrity and therapeutic activity of drugs from effects of light. The photostability characterization is ruled by ICH (The International Council for Harmonization of Technical Requirements for Pharmaceuticals for Human Use), which releases details throughout basic protocols of stability tests to be performed on new medicinal products for human use. The definition of suitable photoprotective systems is fundamental for pharmaceutical manufacturing and for human healthy as well, since light exposure may affect either drugs or drug formulations giving rise even to allergenic or mutagenic by-products...
December 2017: Drug Delivery
https://www.readbyqxmd.com/read/29068539/eosinophil-persistence-in-vivo-and-sustained-viability-ex-vivo-in-response-to-respiratory-challenge-with-fungal-allergens
#18
Wendy E Geslewitz, Caroline M Percopo, Helene F Rosenberg
BACKGROUND: Eosinophils are immunomodulatory leukocytes that contribute to the pathogenesis of Th2 driven asthma and allergic lung diseases. OBJECTIVE: Our goal was to identify unique properties of eosinophils recruited to the lungs and airways of mice in response to challenge with asthma-associated fungal allergens. METHODS: Mice were challenged intranasally on days 0, 3 and 6 with a filtrate of Alternaria alternata. Recruited eosinophils were enumerated in bronchoalveolar lavage fluid...
October 25, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29066321/macrophage-polarization-and-allergic-asthma
#19
REVIEW
Arjun Saradna, Danh C Do, Shruthi Kumar, Qing-Ling Fu, Peisong Gao
Allergic asthma is associated with airway inflammation and airway hyperresponsiveness. Macrophage polarization has been shown to have a profound impact on asthma pathogenesis. On exposure to local microenvironments, recruited macrophages can be polarized into either classically activated (or M1) or alternatively activated (or M2) phenotypes. Macrophage polarization has been heavily associated with development of asthma. The process of regulation of macrophage polarization involves an intricate interplay between various cytokines, chemokines, transcriptional factors, and immune-regulatory cells...
October 7, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29056697/respiratory-allergens-from-furred-mammals-environmental-and-occupational-exposure
#20
REVIEW
Eva Zahradnik, Monika Raulf
Furry mammals kept as pets, farm and laboratory animals are important allergen sources. The prevalence of sensitization to furred mammals appears to be increasing worldwide. Several mammalian allergens from diverse species are well characterized with regard to their molecular structure and immunogenicity, and some are already available for component-resolved allergy diagnostics. The distribution of various mammalian allergens has been extensively studied during the past few decades. Animal allergens were found to be ubiquitous in the human environment, even in places where no animals reside, with concentrations differing considerably between locations and geographical regions...
August 4, 2017: Veterinary Sciences
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