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Abstract
Urticaria is a distressing dermatologic condition for many. Although the wheals of urticaria are characteristically evanescent, lasting less than 24 hours, patients tend to have recurrent episodes. Hives that last less than 6 weeks are considered acute urticaria. Acute urticaria does not routinely require supplementary work-up because the history often identifies a convincing, inciting allergen. Chronic urticaria is defined as episodes that occur for longer than 6 weeks, and there is often not an easily identifiable trigger. For both acute and chronic urticaria, patients frequently report food as a precipitating cause. For acute urticaria, the foods that are associated with true allergies, such as nuts and shellfish, are the most frequent offenders. The relationship between diet and chronic urticaria is not as firmly defined. Many patients unnecessarily restrict their diets, so it becomes the role of dermatologists to help patients identify if there is a reproducible link between their symptoms and their dietary exposures. The literature suggests that diets free from pseudoallergens and histamine-releasing foods may attenuate urticaria. Supplements such as fats, vitamin D, iron, and flavonoids have also been studied and may diminish symptoms.
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Affiliation(s)
- Kimberly Shao
- Department of Dermatology, University of Connecticut Health Center, Farmington, Connecticut, USA
| | - Hao Feng
- Department of Dermatology, University of Connecticut Health Center, Farmington, Connecticut, USA.
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Kajita N, Miyama S, Kinoshita K, Yoshida K, Narita M. Green tea-induced anaphylaxis: The first pediatric case report. Allergol Int 2021; 70:507-508. [PMID: 34183260 DOI: 10.1016/j.alit.2021.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/27/2021] [Accepted: 05/29/2021] [Indexed: 11/25/2022] Open
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Reddy V, Saharay M. Solubility of Caffeine in Supercritical CO 2: A Molecular Dynamics Simulation Study. J Phys Chem B 2019; 123:9685-9691. [PMID: 31617358 DOI: 10.1021/acs.jpcb.9b08351] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The extraction of caffeine from green tea leaves and cocoa beans is a common industrial process for the production of decaffeinated beverages and pharmaceuticals. The choice of the solvent critically determines the yield of this extraction process. Being an environmentally benign and recyclable solvent, supercritical carbon dioxide (scCO2) has emerged as the most desirable green solvent for caffeine extraction. The present study investigates the solvation properties of caffeine in scCO2 at two different temperatures (318 and 350 K) using molecular dynamics simulations. Unlike in water, the caffeine molecules in scCO2 do not aggregate to form clusters due to relatively stronger caffeine-CO2 interactions. A well-structured scCO2 solvent shell envelops each caffeine molecule as a result of strong electron-donor-acceptor (EDA) and hydrogen-bonding interactions between these two species. Upon heating, although marginal site-specific changes in the distribution of nearest CO2 around caffeine are observed, the overall distribution is retained. At a higher temperature, the caffeine-CO2 hydrogen-bonding interactions are weakened, while their EDA interactions become relatively stronger. The results underscore the importance of the interplay of these interactions in determining stable solvent structures and solubility of caffeine in scCO2.
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Affiliation(s)
- Vishwanath Reddy
- Department of Physics, University College of Science , Osmania University , Hyderabad 500007 , Telangana , India
| | - Moumita Saharay
- Department of Physics, University College of Science , Osmania University , Hyderabad 500007 , Telangana , India
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Bojar D, Scheller L, Hamri GCE, Xie M, Fussenegger M. Caffeine-inducible gene switches controlling experimental diabetes. Nat Commun 2018; 9:2318. [PMID: 29921872 PMCID: PMC6008335 DOI: 10.1038/s41467-018-04744-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 05/08/2018] [Indexed: 02/08/2023] Open
Abstract
Programming cellular behavior using trigger-inducible gene switches is integral to synthetic biology. Although significant progress has been achieved in trigger-induced transgene expression, side-effect-free remote control of transgenes continues to challenge cell-based therapies. Here, utilizing a caffeine-binding single-domain antibody we establish a caffeine-inducible protein dimerization system, enabling synthetic transcription factors and cell-surface receptors that enable transgene expression in response to physiologically relevant concentrations of caffeine generated by routine intake of beverages such as tea and coffee. Coffee containing different caffeine concentrations dose-dependently and reversibly controlled transgene expression by designer cells with this caffeine-stimulated advanced regulators (C-STAR) system. Type-2 diabetic mice implanted with microencapsulated, C-STAR-equipped cells for caffeine-sensitive expression of glucagon-like peptide 1 showed substantially improved glucose homeostasis after coffee consumption compared to untreated mice. Biopharmaceutical production control by caffeine, which is non-toxic, inexpensive and only present in specific beverages, is expected to improve patient compliance by integrating therapy with lifestyle.
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Affiliation(s)
- Daniel Bojar
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058, Basel, Switzerland
| | - Leo Scheller
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058, Basel, Switzerland
| | - Ghislaine Charpin-El Hamri
- IUT, Département Génie Biologique, Institut Universitaire de Technologie, F-69622, Villeurbanne Cedex, France
| | - Mingqi Xie
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058, Basel, Switzerland
| | - Martin Fussenegger
- Department of Biosystems Science and Engineering, ETH Zurich, Mattenstrasse 26, 4058, Basel, Switzerland. .,Faculty of Life Science, University of Basel, Mattenstrasse 26, CH-4058, Basel, Switzerland.
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Sugiyama K, Cho T, Tatewaki M, Onishi S, Yokoyama T, Yoshida N, Fujimatsu T, Hirata H, Fukuda T, Fukushima Y. Anaphylaxis due to caffeine. Asia Pac Allergy 2015; 5:55-6. [PMID: 25653922 PMCID: PMC4313757 DOI: 10.5415/apallergy.2015.5.1.55] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 01/07/2015] [Indexed: 12/02/2022] Open
Abstract
We report a rare case of anaphylaxis due to caffeine intake. A 27-year-old woman suffered her first episode of anaphylaxis and a positive skin prick test suggested that the anaphylaxis was due to an IgE-mediated hypersensitivity reaction to caffeine. She was diagnosed with caffeine allergy and has not had an allergic reaction after avoiding foods and drinks containing caffeine. Although caffeine is known to have antiallergic effects, this case shows that caffeine can be an allergen and cause anaphylaxis.
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Affiliation(s)
- Kumiya Sugiyama
- Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | | | - Masamitsu Tatewaki
- Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Shogo Onishi
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Tatsuya Yokoyama
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Naruo Yoshida
- Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Takayoshi Fujimatsu
- Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Hirokuni Hirata
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Takeshi Fukuda
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
| | - Yasutsugu Fukushima
- Department of Respiratory Medicine, Dokkyo Medical University Koshigaya Hospital, Koshigaya 343-8555, Japan. ; Department of Pulmonary Medicine and Clinical Immunology, Dokkyo Medical University, Mibu 321-0293, Japan
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Abstract
We report the case of a young woman presenting with recurrent urticaria. The episodes occurred both in and out of the workplace. On three occasions it presented as urticaria-angioedema, requiring emergency care on one occassion. A thorough clinical history along with serological and allergological tests allowed a diagnosis of caffeine-induced urticaria-angioedema. We advised the patient to follow a caffeine-free diet and to avoid all caffeine or methylxanthine-containing drugs. After two years of caffeine abstinence, she had not experienced any further episodes of urticaria-angioedema. Only a few cases of caffeine-induced urticaria and/or anaphylaxis have been reported till date, with varying outcomes in allergologic investigations. Moreover, several cases are probably undiagnosed or misdiagnosed as idiopathic urticaria or as occupational allergy. We speculate that hypersensitivity to caffeine rather than autoimmine reaction may be the probable cause of urticaria. Caffeine should considered as a potential urticaria-inducing agent and should be included in the allergological test series.
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Affiliation(s)
- Linda Tognetti
- Department of Clinical Medicine and Immunologic Science, Dermatologic Sciences Unit, University of Siena, Siena, Italy
| | - Francesco Murdaca
- Department of Clinical Medicine and Immunologic Science, Dermatologic Sciences Unit, University of Siena, Siena, Italy
| | - Michele Fimiani
- Department of Clinical Medicine and Immunologic Science, Dermatologic Sciences Unit, University of Siena, Siena, Italy
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Koshino LL, Gomes CP, Silva LP, Eira MTS, Bloch C, Franco OL, Mehta A. Comparative proteomical analysis of zygotic embryo and endosperm from Coffea arabica seeds. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:10922-6. [PMID: 18959416 DOI: 10.1021/jf801734m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
During coffee seed development, proteins are predominantly deposited in cotyledons and in the endosperm. Reserve proteins of the 11S family are the most abundant globulins in coffee seeds, acting as a nitrogen source during roasting and guaranteeing flavor and aroma. The aim of the present study was to compare the protein profiles of endosperm and zygotic embryos of coffee seeds. Proteins were extracted from whole seed as well as from embryo and endosperm, separately. Total proteins were analyzed by two-dimensional electrophoresis (2-DE) followed by identification by mass spectrometry (MS). The most abundant spots observed in the gels of coffee seeds were excised, digested with trypsin, and identified by MS as subunits of the 11S globulin. Spots with identical pI and molecular masses were also observed in the protein profiles of coffee endosperm and embryo, indicating that 11S protein is also highly expressed in those tissues. Peptide sequence coverage of about 20% of the entire 11S globulin was obtained. Three other proteins were identified in the embryo and endosperm 2-DE profiles as a Cupin superfamily protein, an allergenic protein (Pru ar 1), exclusive to the endosperm 2D map, and a hypothetical protein, observed only in the zygotic embryo profile.
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Abstract
Urticaria has been called a vexing problem and remains so today. The most important part of the diagnostic evaluation remains a comprehensive and detailed history and physical examination, supplemented with limited laboratory testing. Although acute urticaria has been relatively well understood for some time, significant and important recent advances in under-standing the pathogenesis of chronic urticaria are beginning to provide insight in this challenging field, notably the identification of many of these patients with an autoimmune etiology. Antihistamines of various types continue to represent the keystone of symptomatic treatment, with adjunctive support from medications of other classes, such as antileukotrienes, adrenergics, and immunosuppressive and anti-inflammatory agents (including steroids and cyclosporine). Although some progress has been made at improving symptomatic control of urticaria, further research and discovery are necessary before there can yet be an effective impact on the underlying course and natural history of this condition.
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Affiliation(s)
- Donald A Dibbern
- Division of Allergy and Clinical Immunology, Oregon Health and Sciences University, Portland, OR 97239-3098, USA.
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Affiliation(s)
- I Gonzalez-Mahave
- Allergy Unit of Hospital San Millán-San Pedro, C/Las Terrazas no. 9 4A, CD: 26006 Logroño, La Rioja, Spain.
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Affiliation(s)
- S Infante
- Hospital General Universitario Gregorio , Marañón, Allergy DepartmentC/ Doctor Esquerdo, 4628007 Madrid, Spain.
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