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https://www.readbyqxmd.com/read/28925645/vitamin-b12-deficiency-recognition-and-management
#1
Robert C Langan, Andrew J Goodbred
Vitamin B12 deficiency is a common cause of megaloblastic anemia, various neuropsychiatric symptoms, and other clinical manifestations. Screening average-risk adults for vitamin B12 deficiency is not recommended. Screening may be warranted in patients with one or more risk factors, such as gastric or small intestine resections, inflammatory bowel disease, use of metformin for more than four months, use of proton pump inhibitors or histamine H2 blockers for more than 12 months, vegans or strict vegetarians, and adults older than 75 years...
September 15, 2017: American Family Physician
https://www.readbyqxmd.com/read/28924007/multiple-signaling-pathways-coordinately-regulate-forgetting-of-olfactory-adaptation-through-control-of-sensory-responses-in-c-elegans
#2
Tomohiro Kitazono, Sayuri Hara-Kuge, Osamu Matsuda, Akitoshi Inoue, Manabi Fujiwara, Takeshi Ishihara
Forgetting memories is important for animals to properly respond to continuously changing environments. To elucidate the mechanisms of forgetting, we used one of the behavioral plasticities of C. elegans hermaphrodite, olfactory adaptation to an attractive odorant, diacetyl, as a simple model of learning. In C. elegans, the TIR-1/JNK-1 pathway accelerates forgetting of olfactory adaptation by facilitating neural secretion from AWC sensory neurons. In this study, to identify the downstream effectors of the TIR-1/JNK-1 pathway, we conducted a genetic screen for suppressors of the gain-of-function mutant of tir-1 (ok1052), which shows excessive forgetting...
September 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28923570/-three-cases-of-scombroid-poisoning
#3
Y Harmelin, T Hubiche, M Pharaon, P Del Giudice
INTRODUCTION: Scombroid poisoning is a poorly known type of food poisoning due to the presence of histamine in spoiled fish of the Scombridae family. We report 3 cases of scombroid poisoning seen at the Fréjus-Saint-Raphaël hospital in the Var region. OBSERVATIONS: Within around thirty minutes of eating a meal containing tuna, three patients presented varied symptoms: malaise, itchy rash, headache, and for two of them, nausea. The diagnosis of scombroid poisoning was based on the circumstances in which the clinical signs appeared and on the signs themselves...
September 15, 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28923468/immune-regulation-by-histamine-and-histamine-secreting-bacteria
#4
REVIEW
Weronika Barcik, Marcin Wawrzyniak, Cezmi A Akdis, Liam O'Mahony
Histamine is a biogenic amine with extensive effects on many immune cell types. Histamine and its four receptors (H1R-H4R) represent a complex system of immunoregulation with distinct effects dependent on receptor subtypes and their differential expression. In addition to mammalian cells, bacteria can also secrete histamine and the influence of microbiota-derived histamine on host immunological processes is only beginning to be described. However, it is clear that histamine-secreting microbes are present within the human gut microbiota and their levels are increased in asthma patients...
September 15, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28921918/proteomic-response-of-human-umbilical-vein-endothelial-cells-to-histamine-stimulation
#5
Pelin Esma Emirbayer, Ankit Sinha, Vladimir Ignatchenko, Stefanie Hoyer, Jan Dörrie, Niels Schaft, Monika Pischetsrieder, Thomas Kislinger
The histamine receptors (HRs) represent a subclass of G protein-coupled receptors (GPCRs) and comprise four subtypes. Due to their numerous physiological and pathological effects, HRs are popular drug targets for the treatment of allergic reactions or the regulation of gastric acid secretion. Hence, an understanding of the functional selectivity of HR ligands has gained importance. These ligands can bind to specific GPCRs and selectively activate defined pathways. Supporting the activation of a therapeutically necessary pathway without the activation of other signaling cascades can result in drugs with more specific activity and fewer side effects...
September 18, 2017: Proteomics
https://www.readbyqxmd.com/read/28921744/cholinergic-basal-forebrain-structures-are-not-essential-for-mediation-of-the-arousing-action-of-glutamate
#6
Zoltán Lelkes, Shamsiiat Abdurakhmanova, Tarja Porkka-Heiskanen
The cholinergic basal forebrain contributes to cortical activation and receives rich innervations from the ascending activating system. It is involved in the mediation of the arousing actions of noradrenaline and histamine. Glutamatergic stimulation in the basal forebrain results in cortical acetylcholine release and suppression of sleep. However, it is not known to what extent the cholinergic versus non-cholinergic basal forebrain projection neurones contribute to the arousing action of glutamate. To clarify this question, we administered N-methyl-D-aspartate (NMDA), a glutamate agonist, into the basal forebrain in intact rats and after destruction of the cholinergic cells in the basal forebrain with 192 immunoglobulin (Ig)G-saporin...
September 18, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28921663/insect-bite-hypersensitivity-in-horses-is-associated-with-airway-hyperreactivity
#7
S Lanz, A Brunner, C Graubner, E Marti, V Gerber
BACKGROUND: Genetic and epidemiologic evidence suggests that in horses, as in other species, different manifestations of hypersensitivity may occur together. HYPOTHESIS: Horses affected with insect bite hypersensitivity (IBH) show airway hyperreactivity (AH) to inhaled histamine, even in the absence of overt clinical signs of equine asthma (EA). ANIMALS: Twenty-two healthy controls (group C), 24 horses suffering from IBH alone (group IBH), and 23 horses suffering from IBH and EA (group IBH/EA)...
September 18, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28919798/comparative-effects-of-the-%C3%AF-3-polyunsaturated-fatty-acid-derivatives-resolvins-e1-and-d1-and-protectin-dx-in-models-of-inflammation-and-pain
#8
Flávia Cs Fonseca, Ricardo M Orlando, Regina Mm Turchetti-Maia, Janetti Nogueira de Francischi
PURPOSE: Specialized pro-resolving lipid mediators (SPMs), also known as lipoxins, resolvins (Rvs), protectins and maresins, have been implicated in the resolution of the inflammatory process. However, a systematic comparison of their activity in the relief of inflammation and pain models is still lacking. MATERIALS AND METHODS: The effects of Rvs E1 and D1 and protectin DX (PDX) were assessed in rat paws inflamed by the standard proinflammatory stimulus carrageenan or by histamine, 5-hydroxytryptamine, substance P or prostaglandin E2...
2017: Journal of Inflammation Research
https://www.readbyqxmd.com/read/28919488/mast-cells-derived-from-human-induced-pluripotent-stem-cells-are-useful-for-allergen-tests
#9
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/28917668/gut-microbe-mediated-suppression-of-inflammation-associated-colon-carcinogenesis-by-luminal-histamine-production
#10
Chunxu Gao, Bhanu Priya Ganesh, Zhongcheng Shi, Rajesh Rasik Shah, Robert Fultz, Angela Major, Susan Venable, Monica Lugo, Kathleen Hoch, Xiaowei Chen, Anthony Haag, Timothy C Wang, James Versalovic
Microbiome-mediated suppression of carcinogenesis may open new avenues for identification of therapeutic targets and prevention strategies in oncology. Histidine decarboxylase (HDC) deficiency has been shown to promote inflammation-associated colorectal cancer by accumulation of CD11b(+)Gr-1(+) immature myeloid cells, indicating a potential antitumorigenic effect of histamine. Here, we demonstrate that administration of hdc(+)Lactobacillus reuteri in the gut resulted in luminal hdc gene expression and histamine production in the intestines of Hdc(-/-) mice...
September 6, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28916845/pharmacological-investigations-on-mast-cell-stabilizer-and-histamine-receptor-antagonists-in-vincristine-induced-neuropathic-pain
#11
Amteshwar Singh Jaggi, Gunjanpreet Kaur, Anjana Bali, Nirmal Singh
The present study was designed to investigate the role of mast cells and mast cell-derived histamine in vincristine-induced neuropathic pain. Neuropathic pain was induced by administration of vincristine (100 μg/kg, i.p.) over a period of 10 days, with a break of 2 days, and pain behavioural estimations including pin prick, hot plate and acetone spray tests were performed to assess mechanical and heat hyperalgesia and cold allodynia, respectively, on days 0, 14 and 28. Mast cell stabilizer, sodium cromoglycate, H1 receptor antagonist promethazine and H2 receptor antagonist ranitidine were administered over a period of 12 days...
September 15, 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28915062/a-recombinant-fragment-of-human-surfactant-protein-d-suppresses-basophil-activation-th2-and-b-cell-responses-in-grass-pollen-induced-allergic-inflammation
#12
Asif S Qaseem, Iesha Singh, Ansar A Pathan, Janice A Layhadi, Rebecca Parkin, Fedina Alexandra, Stephen R Durham, Uday Kishore, Mohamed H Shamji
RATIONALE: rfhSP-D has been shown to suppress house dust mite and Aspergillus fumigatus-induced allergic inflammation in murine models. OBJECTIVES: We sought to elucidate the effect of rfhSP-D on FcεRI and CD23-mediated grass pollen induced allergic inflammatory responses. METHODS: rfhSP-D, containing homotrimeric neck and lectin domains, was expressed in Escherichia coli BL21 (λDE3) pLysS. PBMCs and sera were obtained from grass pollen allergic individuals (n=27)...
September 15, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28914203/phytomedicines-are-efficient-complementary-therapies-for-the-treatment-of-atopic-dermatitis-a-review-of-mechanistic-insight-and-recent-updates
#13
Mohamad Aidil Tumpang, Nor Amlizan Ramli, Zahid Hussain
BACKGROUND: Phytomedicines have been well-accepted alternative complementary therapies for the treatment of a wide range of acute and chronic skin inflammatory diseases including chronic herpes, prurigo, psoriasis, and atopic dermatitis (AD). Plethora of in vitro and in vivo studies have evidenced the therapeutic viability of phytomedicines, polyherbal formulations, plant-based materials and their decoctions for the treatment of mild-to-severe AD. OBJECTIVE: This review was aimed to summarize and critically discuss the convincing evidence for the therapeutic effectiveness of phytomedicines for the treatment of AD and explore their anti-AD efficacy...
September 13, 2017: Current Drug Targets
https://www.readbyqxmd.com/read/28913989/patterns-of-inhalant-allergen-sensitization-and-geographical-variation-in-korean-adults-a-multicenter-retrospective-study
#14
Min Gyu Kang, Mi Yeong Kim, Woo Jung Song, Sujeong Kim, Eun Jung Jo, Seung Eun Lee, Jae Woo Kwon, Sang Min Lee, Chan Sun Park, Hye Kyung Park, Heung Woo Park, Yoon Seok Chang, Jaechun Lee, Young Min Lee, Young Koo Jee, Jong Myung Lee, Inseon S Choi, Sang Heon Cho
PURPOSE: Inhalant allergen sensitization is one of the major factors involved in the pathogenesis of allergic respiratory diseases. However, the sensitization is determined by interactions between genetic and environmental factors. Thus, testing panels of inhalant allergens may differ among geographical areas. Here we aimed to determine 10 common inhalant allergens in Korean adult patients with suspected respiratory allergies and to examine the variation between different geographical locations...
November 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28912446/an-injectable-hydrogel-enhances-tissue-repair-after-spinal-cord-injury-by-promoting-extracellular-matrix-remodeling
#15
Le Thi Anh Hong, Young-Min Kim, Hee Hwan Park, Dong Hoon Hwang, Yuexian Cui, Eun Mi Lee, Stephanie Yahn, Jae K Lee, Soo-Chang Song, Byung Gon Kim
The cystic cavity that develops following injuries to brain or spinal cord is a major obstacle for tissue repair in central nervous system (CNS). Here we report that injection of imidazole-poly(organophosphazenes) (I-5), a hydrogel with thermosensitive sol-gel transition behavior, almost completely eliminates cystic cavities in a clinically relevant rat spinal cord injury model. Cystic cavities are bridged by fibronectin-rich extracellular matrix. The fibrotic extracellular matrix remodeling is mediated by matrix metalloproteinase-9 expressed in macrophages within the fibrotic extracellular matrix...
September 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/28911614/hygienic-quality-adulteration-of-pork-and-histamine-production-by-raoultella-ornithinolytica-in-milkfish-dumpling
#16
Yi-Chen Lee, Yi-Fen Chen, Ya-Ling Huang, Hsien-Feng Kung, Tai-Yuan Chen, Yung-Hsiang Tsai
Ten milkfish dumpling products purchased from retail stores in southern Taiwan were collected to determine the occurrence of biogenic amines, histamine-forming bacteria, and adulteration of pork. This study showed the high contents of aerobic plate count (APC), total coliforms (TC) and Escherichia coli in tested milkfish dumpling samples, whereas the average content of various biogenic amines in all tested samples was < 1.6 mg/100 g (< 0.05 to 1.54 mg/100 g). Three histamine-producing bacterial strains (2 isolates of Raoultella ornithinolytica and 1 isolate of Enterobacter aerogenes) isolated from tested samples produced 276...
October 2016: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911343/validation-study-of-maxsignal-%C3%A2-histamine-enzymatic-assay-for-the-detection-of-histamine-in-fish-seafood
#17
Swapna Gone, Nicolas Kosa, Joseph Krebs
Bioo Scientific Corp. has developed a rapid enzymatic quantitative assay for the determination of histamine inseafood. Fresh/frozen tuna, canned tuna, pouched tuna, and frozen mahi mahi samples were used for the validation study under the specific guidelines of the AOAC Research Institute Performance Tested Methods(SM) program. Recoveries ranged from 82 to 107% at concentrations ranging from 6 to 72 ppm, with RSDr values between 0.8 and 6.5% (6–72 ppm). The linearity of the assay ranged from 0 to 108 ppm, with R² values exceeding 0...
September 15, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28910291/minimizing-nocebo-effects-by-conditioning-with-verbal-suggestion-a-randomized-clinical-trial-in-healthy-humans
#18
Danielle J P Bartels, Antoinette I M van Laarhoven, Michiel Stroo, Kim Hijne, Kaya J Peerdeman, A Rogier T Donders, Peter C M van de Kerkhof, Andrea W M Evers
Nocebo effects, i.e., adverse treatment effects which are induced by patients' expectations, are known to contribute to the experience of physical symptoms such as pain and itch. A better understanding of how to minimize nocebo responses might eventually contribute to enhanced treatment effects. However, little is known about how to reduce nocebo effects. In the current randomized controlled study, we tested whether nocebo effects can be minimized by positive expectation induction with respect to electrical and histaminic itch stimuli...
2017: PloS One
https://www.readbyqxmd.com/read/28905530/nonspecific-bronchoprovocation-test
#19
REVIEW
Myoung Kyu Lee, Hyoung Kyu Yoon, Sei Won Kim, Tae Hyung Kim, Seoung Ju Park, Young Min Lee
Bronchial asthma is a disease characterized by the condition of airway hyper-responsiveness, which serves to produce narrowing of the airway secondary to airway inflammation and/or various spasm-inducing stimulus. Nonspecific bronchoprovocation testing is an important method implemented for the purpose of diagnosing asthma; this test measures the actual degree of airway hyper-responsiveness and utilizes direct and indirect bronchoprovocation testing. Direct bronchoprovocation testing using methacholine or histamine may have superior sensitivity as these substances directly stimulate the airway smooth muscle cells...
September 1, 2017: Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28901381/anti%C3%A2-allergic-action-of-bacillus-calmette%C3%A2-guerin-extract-in-experimental-mast-cell%C3%A2-mediated-anaphylactic-models
#20
Mingli Sun, Yong Wang, Haishan Zhao, Weifan Yao, Xiaosong Yu
Allergy is an acquired hypersensitivity reaction of the immune system mediated by IgE‑induced mast cell degranulation. In China, bacillus Calmette‑Guerin extract (BCGE) has been shown to be clinically effective for regulating immunity, which enhances the resistance of the body to anaphylactic disease, infectious diseases and cancer. However, the mechanisms remain to be fully elucidated. The present study investigated the potential anti‑allergic effects of BCGE in animal models of mast cell‑dependent anaphylaxis and mechanisms of BCGE in mast cells...
August 29, 2017: Molecular Medicine Reports
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