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Wang JJF, Dhir A, Hildebrand KJ, Turvey SE, Schellenberg R, Chen LYC, Pourshahnazari P, Biggs CM. Inborn errors of immunity in adulthood. Allergy Asthma Clin Immunol 2024; 20:6. [PMID: 38233962 DOI: 10.1186/s13223-023-00862-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 11/26/2023] [Indexed: 01/19/2024]
Abstract
Inborn errors of immunity (IEIs) are a group of conditions whereby parts of the immune system are missing or dysfunctional. Once thought to primarily be a pediatric disorder, it is now estimated that more than 50% of worldwide incident IEI cases are accounted for by adults. Delayed diagnosis, late symptom onset, and IEI phenocopies can all lead to adult-onset recognition of IEIs. Lack of awareness regarding the diversity of IEI manifestations in adults contributes to diagnostic and treatment delays. Prompt referral to immunology is critical so that patients can receive a precise molecular diagnosis and targeted therapy when available. This article serves as a primer on IEIs in adulthood, highlighting the pathophysiology, epidemiology and clinical features. We present clinical vignettes of three key IEIs to assist clinicians in building illness scripts on their presentations. We provide a framework for the laboratory evaluation of IEIs and their initial treatment, with the aim of improving recognition and management of these conditions.
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Affiliation(s)
- Joanne J F Wang
- Department of Medicine, University of British Columbia, Vancouver, Canada
| | - Arün Dhir
- Department of Medicine, University of British Columbia, Vancouver, Canada
| | - Kyla J Hildebrand
- Department of Pediatrics, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, Canada
| | - Stuart E Turvey
- Department of Pediatrics, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, Canada
| | | | - Luke Y C Chen
- Department of Medicine, University of British Columbia, Vancouver, Canada
| | | | - Catherine M Biggs
- Department of Medicine, University of British Columbia, Vancouver, Canada.
- Department of Pediatrics, BC Children's Hospital Research Institute, University of British Columbia, Vancouver, Canada.
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Bogdal C, Schellenberg R, Lory M, Bovens M, Höpli O. Recognition of gasoline in fire debris using machine learning: Part II, application of a neural network. Forensic Sci Int 2022; 332:111177. [PMID: 35065332 DOI: 10.1016/j.forsciint.2022.111177] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/22/2021] [Accepted: 01/04/2022] [Indexed: 11/23/2022]
Abstract
The recognition of ignitable liquid (IL) residues in fire debris is a resource intensive but key part of an arson investigation. Due to the highly diverse and heavily loaded chemical matrix of fire debris samples, combined with the broad chemical composition of IL, the interpretation of the laboratory analysis results is a very challenging task for the forensic examiner. Fire debris samples are commonly analyzed using gas chromatography coupled to mass spectrometry (GC-MS). This method delivers both the total ion chromatogram (TIC) with the individually separated compounds and the underlying mass spectrum of each of the separated compounds. In this study, a completely new approach for the recognition of gasoline in fire debris samples is presented. First, the GC-MS data, including retention time, signal intensity, and mass spectrum is converted into a bitmap image. Five different data-to-image conversion approaches are tested, and their advantages and limitations are discussed. Subsequently, a convolutional neural network (CNN) is utilized to allocate the generated images to the classes "with gasoline" or "without gasoline". The applied approaches to generate a digital image and the pattern recognition of the CNN perform very well in the classification of unknown test samples. Depending on the data-to-image generation approach used, the rate of correct sample classification in the test dataset is between 95% and 98%. The machine learning approach in this study, as well as the complementary method presented in an accompanying article, are not only useful for the recognition of gasoline in fire debris but are equally applicable to any additional areas in which the interpretation of complex chromatographic and mass spectrometric is required.
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Affiliation(s)
- C Bogdal
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland.
| | - R Schellenberg
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland
| | - M Lory
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland
| | - M Bovens
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland
| | - O Höpli
- Zurich Municipal Police, Zeughausstrasse 31, 8004 Zurich, Switzerland
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Bogdal C, Schellenberg R, Höpli O, Bovens M, Lory M. Recognition of gasoline in fire debris using machine learning: Part I, application of random forest, gradient boosting, support vector machine, and naïve bayes. Forensic Sci Int 2021; 331:111146. [PMID: 34968789 DOI: 10.1016/j.forsciint.2021.111146] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 11/01/2021] [Accepted: 12/07/2021] [Indexed: 11/29/2022]
Abstract
The detection and identification of ignitable liquid (IL) residues in fire debris are two very challenging tasks in a fire investigation. To this day, the recognition of IL in fire debris includes the chemical analysis of the fire debris composition, followed by the examination and interpretation of the analysis result by a trained forensic examiner. Throughout the last decade, chemometrics and artificial intelligence have become increasingly important. In the present study, machine learning algorithms capable of recognizing gasoline residues in fire debris based on GC-MS data have been developed. Four methods, including random forest, gradient boosting, support vector machine, and naïve bayes are applied and used to classify fire debris samples into the two categories "with gasoline" or "without gasoline". A fifth method (logistic regression) did not converge due to well separated classes. A database comprising 360 measurements, including fire debris samples of real cases as well as fire debris samples spiked with known amounts of weathered gasoline (up to 99.6%), was available to train the machine learning algorithms (using 85% of the data) and to subsequently test the performance of the methods when classifying unknown samples (using 15% of the data). In general, the methods perform very well, as three of it succeeded to classify all test samples correctly without any false positive or false negative allocations. One (naïve bayes) was not trained enough to classify other (non-gasoline) IL correctly as "no gasoline". Furthermore, the random forest method reveals which chemical compounds are most relevant for the algorithm to classify the samples. In general, the presented approach is highly promising and could easily be extended or adapted to other types of IL. Similar to the neural network presented in the accompanying paper, such methods have the potential to serve as a fast screening technique for fire debris samples, thus supporting the forensic examiner by providing an additional independent opinion. Nonetheless, the definite identification of IL residues in fire debris always has to be accomplished by a forensic examiner.
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Affiliation(s)
- C Bogdal
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland.
| | - R Schellenberg
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland
| | - O Höpli
- Zurich Municipal Police, Zeughausstrasse 31, 8004 Zurich, Switzerland
| | - M Bovens
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland
| | - M Lory
- Zurich Forensic Science Institute, Zeughausstrasse 11, 8004 Zurich, Switzerland
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Leitao Filho FS, Mattman A, Schellenberg R, Criner GJ, Woodruff P, Lazarus SC, Albert RK, Connett J, Han MK, Gay SE, Martinez FJ, Fuhlbrigge AL, Stoller JK, MacIntyre NR, Casaburi R, Diaz P, Panos RJ, Cooper JA, Bailey WC, LaFon DC, Sciurba FC, Kanner RE, Yusen RD, Au DH, Pike KC, Fan VS, Leung JM, Man SFP, Aaron SD, Reed RM, Sin DD. Serum IgG Levels and Risk of COPD Hospitalization: A Pooled Meta-analysis. Chest 2020; 158:1420-1430. [PMID: 32439504 DOI: 10.1016/j.chest.2020.04.058] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 04/01/2020] [Accepted: 04/10/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Hypogammaglobulinemia (serum IgG levels < 7.0 g/L) has been associated with increased risk of COPD exacerbations but has not yet been shown to predict hospitalizations. RESEARCH QUESTION To determine the relationship between hypogammaglobulinemia and the risk of hospitalization in patients with COPD. STUDY DESIGN AND METHODS Serum IgG levels were measured on baseline samples from four COPD cohorts (n = 2,259): Azithromycin for Prevention of AECOPD (MACRO, n = 976); Simvastatin in the Prevention of AECOPD (STATCOPE, n = 653), Long-Term Oxygen Treatment Trial (LOTT, n = 354), and COPD Activity: Serotonin Transporter, Cytokines and Depression (CASCADE, n = 276). IgG levels were determined by immunonephelometry (MACRO; STATCOPE) or mass spectrometry (LOTT; CASCADE). The effect of hypogammaglobulinemia on COPD hospitalization risk was evaluated using cumulative incidence functions for this outcome and deaths (competing risk). Fine-Gray models were performed to obtain adjusted subdistribution hazard ratios (SHR) related to IgG levels for each study and then combined using a meta-analysis. Rates of COPD hospitalizations per person-year were compared according to IgG status. RESULTS The overall frequency of hypogammaglobulinemia was 28.4%. Higher incidence estimates of COPD hospitalizations were observed among participants with low IgG levels compared with those with normal levels (Gray's test, P < .001); pooled SHR (meta-analysis) was 1.29 (95% CI, 1.06-1.56, P = .01). Among patients with prior COPD admissions (n = 757), the pooled SHR increased to 1.58 (95% CI, 1.20-2.07, P < .01). The risk of COPD admissions, however, was similar between IgG groups in patients with no prior hospitalizations: pooled SHR = 1.15 (95% CI, 0.86-1.52, P =.34). The hypogammaglobulinemia group also showed significantly higher rates of COPD hospitalizations per person-year: 0.48 ± 2.01 vs 0.29 ± 0.83, P < .001. INTERPRETATION Hypogammaglobulinemia is associated with a higher risk of COPD hospital admissions.
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Affiliation(s)
- Fernando Sergio Leitao Filho
- Centre for Heart Lung Innovation, St. Paul's Hospital & Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Andre Mattman
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Robert Schellenberg
- Centre for Heart Lung Innovation, St. Paul's Hospital & Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Gerard J Criner
- Department of Thoracic Medicine and Surgery, Lewis Katz School of Medicine at Temple University, Philadelphia, PA
| | - Prescott Woodruff
- Department of Medicine, University of California, San Francisco, San Francisco, CA
| | - Stephen C Lazarus
- Department of Medicine, University of California, San Francisco, San Francisco, CA
| | | | - John Connett
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN
| | - Meilan K Han
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI
| | - Steven E Gay
- Division of Pulmonary and Critical Care Medicine, University of Michigan, Ann Arbor, MI
| | - Fernando J Martinez
- Division of Pulmonary and Critical Care Medicine, Weill Cornell Medical College, New York, NY
| | - Anne L Fuhlbrigge
- Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado School of Medicine, Aurora, CO
| | | | - Neil R MacIntyre
- Department of Medicine, Duke University Medical Center, Durham, NC
| | - Richard Casaburi
- Division of Respiratory and Critical Care Physiology and Medicine, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA
| | - Philip Diaz
- Department of Internal Medicine, Ohio State University, Columbus, OH
| | - Ralph J Panos
- Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH
| | - J Allen Cooper
- Birmingham VA Medical Center, Birmingham, AL; Department of Medicine, University of Alabama Medical School, Birmingham, AL
| | - William C Bailey
- Department of Medicine, University of Alabama Medical School, Birmingham, AL
| | - David C LaFon
- Department of Medicine, University of Alabama Medical School, Birmingham, AL
| | - Frank C Sciurba
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA
| | - Richard E Kanner
- Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, UT
| | - Roger D Yusen
- Divisions of Pulmonary and Critical Care Medicine and General Medical Sciences, Washington University School of Medicine in Saint Louis, Saint Louis, MO
| | - David H Au
- Division of Pulmonary, Critical Care and Sleep Medicine and School of Nursing, University of Washington, Seattle, WA
| | - Kenneth C Pike
- Division of Pulmonary, Critical Care and Sleep Medicine and School of Nursing, University of Washington, Seattle, WA
| | - Vincent S Fan
- Division of Pulmonary, Critical Care and Sleep Medicine and School of Nursing, University of Washington, Seattle, WA; VA Puget Sound Health Care System, Seattle, WA
| | - Janice M Leung
- Centre for Heart Lung Innovation, St. Paul's Hospital & Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Shu-Fan Paul Man
- Centre for Heart Lung Innovation, St. Paul's Hospital & Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Shawn D Aaron
- Department of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Robert M Reed
- Department of Medicine, University of Maryland, Baltimore, MD
| | - Don D Sin
- Centre for Heart Lung Innovation, St. Paul's Hospital & Department of Medicine, University of British Columbia, Vancouver, BC, Canada.
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Alsayegh MA, Alshamali H, Khadada M, Ciccolini A, Ellis AK, Quint D, Powley W, Lee L, Fiteih Y, Baksh S, Vliagoftis H, Gerega SK, Millson B, Charland K, Barakat S, Sun X, Jimenez R, Waserman S, FitzGerald MJ, Hébert J, Cognet-Sicé J, Renahan KE, Huq S, Chooniedass R, Sawyer S, Pasterkamp H, Becker A, Smith SG, Zhang S, Jayasundara K, Tacon C, Simidchiev A, Nadeau G, Gunsoy N, Mullerova H, Albers F, Kim YW, Shannon CP, Singh A, Neighbour H, Larché M, Tebbutt SJ, Klopp A, Vehling L, Becker AB, Subbarao P, Mandhane PJ, Turvey SE, Sears MR, Azad MB, Loewen K, Monchka B, Mahmud SM, Jong G‘, Longo C, Bartlett G, Ducharme FM, Schuster T, MacGibbon B, Barnett T, North ML, Brook J, Lee E, Omana V, Thiele J, Steacy LM, Evans G, Diamond M, Sussman GL, Amistani Y, Abiteboul K, Tenn MW, Yang C, Carlsten C, Conway EM, Mack D, Othman Y, Barber CM, Kalicinsky C, Burke AE, Messieh M, Nair P, Che CT, Douglas L, Liem J, Duan L, Miller C, Dupuis P, Connors LA, Fein MN, Shuster J, Hadi H, Polk B, Raje N, Labrosse R, Bégin P, Paradis L, Roches AD, Lacombe-Barrios J, Mishra S, Lacuesta G, Chiasson M, Haroon B, Robertson K, Issekutz T, Leddin D, Couban S, Connors L, Roos A, Kanani A, Chan ES, Schellenberg R, Rosenfield L, Cvetkovic A, Woodward K, Quirt J, Watson WTA, Castilho E, Sullivan JA, Temple B, Martin D, Cook VE, Mills C, Portales-Casamar E, Fu LW, Ho A, Zaltzman J, Chen L, Vadas P, Gabrielli S, Clarke A, Eisman H, Morris J, Joseph L, LaVieille S, Ben-Shoshan M, Graham F, Barnes C, Portnoy J, Stagg V, Simons E, Lefebvre D, Dai D, Mandhane P, Sears M, Tam H, Simons FER, Alotaibi D, Dawod B, Tunis MC, Marshall J, Desjardins M, Béland M, Lejtenyi D, Drolet JP, Lemire M, Tsoukas C, Noya FJ, Alizadehfar R, McCusker CT, Mazer BD, Maestre-Batlle D, Gunawan E, Rider CF, Bølling AK, Pena OM, Suez D, Melamed I, Hussain I, Stein M, Gupta S, Paris K, Fritsch S, Bourgeois C, Leibl H, McCoy B, Noel M, Yel L, Scott O, Reid B, Atkinson A, Kim VHD, Roifman CM, Grunebaum E, AlSelahi E, Aleman F, Oberle A, Trus M, Sussman G, Kanani AS, Chambenoi O, Chiva-Razavi S, Grodecki S, Joshi N, Menikefs P, Holt D, Pun T, Tworek D, Hanna R, Heroux D, Rosenberg E, Stiemsma L, Turvey S, Denburg J, Mill C, Teoh T, Zimmer P, Avinashi V, Paina M, Darwish Hassan AA, Oliveria JP, Olesovsky C, Gauvreau G, Pedder L, Keith PK, Plunkett G, Bolner M, Pourshahnazari P, Stark D, Vostretsova K, Moses A, Wakeman A, Singer A, Gerstner T, Abrams E, Johnson SF, Woodgate RL. Canadian Society of Allergy and Clinical Immunology annual scientific meeting 2016. Allergy Asthma Clin Immunol 2017. [PMCID: PMC5390240 DOI: 10.1186/s13223-017-0192-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Betschel SD, Warrington RJ, Schellenberg R. Clinical Experience with Octagam® 10 %, a solvent detergent virus inactivated intravenous immunoglobulin: a Canadian retrospective review of utilization. Allergy Asthma Clin Immunol 2016; 12:32. [PMID: 27468299 PMCID: PMC4962395 DOI: 10.1186/s13223-016-0138-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Accepted: 07/06/2016] [Indexed: 11/10/2022] Open
Abstract
In Canada, intravenous immune globulin (IVIg) products are licensed for six disease indications, however it has been demonstrated that patients with a number of other conditions also benefit from IVIg. Here we report the routine clinical use of Octagam® 10 % across three Canadian institutions. A total of 135 patients were treated with Octagam®, for conditions represented by five distinct indication groups. The results of this review indicate that Octagam® has been well adopted and is prescribed to Canadian patients similar to other IVIg products. In alignment with current practices, 85 % of Octagam’s utilization was classified as appropriate based on Canadian IVIg guidelines.
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Affiliation(s)
- Stephen D Betschel
- St Michael's Hospital and the University of Toronto, 30 Bond St, Toronto, ON M5B 1W8 Canada
| | - Richard J Warrington
- Head, Section of Allergy & Immunology, Department of Internal Medicine, University of Manitoba, Winnipeg Health Science Center, GC319 820 Sherbrook St, Winnipeg, MB R3A 1R9 Canada
| | - Robert Schellenberg
- St Paul's Hospital and the University of British Columbia, 1081 Burrard St, Vancouver, BC V6C 1Y6 Canada
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Côté MÈ, Boulay MÈ, Plante S, Chakir J, Boulet LP, Ahmed H, Ospina MB, Sideri K, Vliagoftis H, Johnson SF, Woodgate RL, Cros G, Teira P, Cellot S, Bittencourt H, Decaluwe H, Vachon MF, Duval M, Haddad E, Kim VHD, Pham-Huy A, Grunebaum E, Oliveria JP, Phan S, Tenn MW, Tworek D, Smith SG, Baatjes AJ, Obminski CD, Munoz CE, Scime TX, Sehmi R, Gauvreau GM, Salter BM, Smith SG, Obminski CD, Munoz CE, Schlatman A, Scime TX, Watson R, Sherkat R, Khoshnevisan R, Sheikhbahaei S, Betschel S, Warrington R, Schellenberg R, Fein MN, Pelletier JP, Kan M, Labrosse R, Mak R, Loh J, Kanani A, Nowak DA, Keith PK, Pannozzo D, Lima HC, Pham D, Pham H, Alvarez GG, Bencze IT, Sharma KB, Smith M, Aaron S, Block J, Keays T, Leech J, Schneidermen D, Cameron J, Forgie J, Ring A, O’Quinn JW, Santucci S, Yang WH, Gaudet E, Aaron S, Voisin MR, Borici-Mazi R, Vostretsova K, Stark DF, Yeboah E, Martin-Rhee M, Gula C, Cheng C, Paltser G, Dery A, Clarke A, Nadeau K, Harada L, Weatherall K, Greenwood C, Daley D, Asai Y, Ben-Shoshan M, Ling L, Ospina MB, Protudjer JLP, Vetander M, van Hage M, Olén O, Wickman M, Bergström A, Teoh T, Mill C, Wong T, Baerg I, Alexander A, Hildebrand KJ, Dean J, Kuzeljevic B, Chan ES, Argeny J, Gona-Hoepler M, Fucik P, Nachbaur E, Gruber S, Crameri R, Glaser A, Szépfalusi Z, Rhyner C, Eiwegger T, Plunkett G, Mire B, Yazicioglu M, Can C, Ciplak G, Cook VE, Portales-Casamar E, Nashi EP, Gabrielli S, Primeau MN, Lejtenyi C, Netchiporouk E, Dery A, Shand G, Hoe E, Liem J, Ko JK, Huang DJT, Mazza JA, McHenry M, Otley A, Watson W, Kraft JN, Paina M, Darwish Hassan AA, Heroux D, Crawford L, Gauvreau G, Denburg J, Pedder L, Chad Z, Sussman G, Hébert J, Frankish C, Olynych T, Cheema A, Del Carpio J, Harrison R, Torabi B, Medoff E, Mill J, Quirt JA, Wen X, Kim J, Herrero AJ, Kim HL, Grzyb MJ, Primeau MN, Azad MB, Lu Z, Becker AB, Subbarao P, Mandhane PJ, Turvey SE, Sears MR, Boucher-Lafleur AM, Gagné-Ouellet V, Jacques É, Laprise C, Chen M, McGovern T, Adner M, Martin JG, Cosic N, Ntanda H, Giesbrecht G, Kozyrskyj A, Letourneau N, Dawod B, Marshall J, De Schryver S, Halbrich M, La Vieille S, Eisman H, Alizadehfar R, Joseph L, Morris J, Feldman LY, Thacher JD, Kull I, Melén E, Pershagen G, Protudjer JLP, Hosseini A, Hackett TL, Hirota J, McNagny K, Wilson S, Carlsten C, Huq S, Chooniedass R, Gerwing B, Huang H, Lefebvre D, Becker A, Khamis MM, Awad H, Allen K, Adamko DJ, El-Aneed A, Kim YW, Gliddon DR, Shannon CP, Singh A, Hickey PLC, Ellis AK, Neighbour H, Larche M, Tebbutt SJ, Ladouceur E, Stewart M, Evans J, Masuda J, To T, King M, Larouche M, Liang L, Legere SA, Haidl ID, Legaré JF, Marshall JS, Sears M, Moraes TJ, Ratjen F, Gustafsson P, Lou W, North ML, Lee E, Omana V, Thiele J, Brook J, Rahman T, Lejtenyi D, Fiter R, Piccirillo C, Mazer B, Simons E, Hildebrand K, Turvey S, DeMarco M, Le Cao KA, Gauvreau GM, Mark FitzGerald J, O’Byrne PM, Stiemsma LT, Arrieta MC, Cheng J, Dimitriu PA, Thorson L, Yurist S, Lefebvre DL, Mandhane P, McNagny KM, Kollmann T, Mohn WW, Brett Finlay B, Tran MM, Lefebvre DL, Ramasundarahettige CF, Dai WH, Mandhane PJ, Tworek D, O’Byrne SN, O’Byrne PM, Denburg JA, Walsh L, Soliman M, Steacy LM, Adams DE, Warner L, Mauro MA, Mamonluk R, Yang C, Conway EM. Proceedings of the Canadian society of allergy and clinical immunology annual scientific meeting 2015. Allergy Asthma Clin Immunol 2016. [PMCID: PMC5009563 DOI: 10.1186/s13223-016-0118-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
A1 Role of fibrocytes in allergic rhinitis Marie-Ève Côté, Marie-Ève Boulay, Sophie Plante, Jamila Chakir, Louis-Philippe Boulet A2 Patterns of aeroallergens sensitization in Northern Alberta Hanan Ahmed, Maria-Beatriz Ospina, Kyriaki Sideri, Harissios Vliagoftis A3 Addressing acceptable risk for adolescents with Food-Induced Anaphylaxis (FIA) Sara F. Johnson, Roberta L. Woodgate A4 Outcomes of matched related and unrelated bone marrow transplantation after reduced-toxicity conditioning for children suffering from Chronic Granulomatous Disease Guilhem Cros, Pierre Teira, Sonia Cellot, Henrique Bittencourt, Helene Decaluwe, Marie France Vachon, Michel Duval, Elie Haddad A5 Outcomes of patients with severe combined immunodeficiency (SCID) prior to and after initiation of newborn screening for SCID in Ontario Vy H.D. Kim, Anne Pham-Huy, Eyal Grunebaum A6 Detection of regulatory B cells in the airways of subjects with asthma John-Paul Oliveria, Stephanie Phan, Mark W. Tenn, Damian Tworek, Steven G. Smith, Adrian J. Baatjes, Caitlin D. Obminski, Caroline E. Munoz, Tara X. Scime, Roma Sehmi, Gail M Gauvreau A7 Characterization of IgE-expressing B cells in the airways and peripheral blood of allergic asthmatic subjects John-Paul Oliveria, Stephanie Phan, Mark W. Tenn, Brittany M Salter, Steven G Smith, Caitlin D Obminski, Caroline E Munoz, Abbey Schlatman, Tara X Scime, Rick Watson, Roma Sehmi, Gail M Gauvreau A8 Pregnancy: could it be a risk factor for primary immunodeficient patients Roya Sherkat, Razieh Khoshnevisan, Saba Sheikhbahaei A9 Clinical experience with Octagam: a Canadian retrospective chart review Stephen Betschel, Richard Warrington, Robert Schellenberg A10 Kounis syndrome secondary to contrast media with inferior ST elevations and bilateral ischemic stroke Michael N Fein, Jean-Philippe Pelletier A11 Honey bee venom immunotherapy ineffective in bumble bee-induced anaphylaxis: case report and review of literature Manstein Kan, Robert Schellenberg A12 Delayed immune reconstitution occurring after multiple immune complications of hematological stem cell transplantation for a leaky SCID Roxane Labrosse, Guilhem Cros, Pierre Teira, Henrique Bittencourt, Helene Decaluwe, Michel Duval, Elie Haddad A13 Comparison of Three Case Reports of Acquired Angioedema: presentation, management and outcome Raymond Mak, James Loh, Amin Kanani A14 Sitagliptin-associated angioedema not related to concurrent use of ARB or ACE inhibitor Dominik A. Nowak, Paul K. Keith A15 Sneddon-Wilkinson subcorneal pustular dermatosis associated with an IgA monoclonal gammopathy Daniel Pannozzo, Dominik A. Nowak, Hermenio C. Lima A16 Omalizumab can be effective in patients with allergic bronchopulmonary aspergillosis Diana Pham, Hoang Pham, Gonzalo G. Alvarez, Istvan T. Bencze, Krishna B. Sharma, Mark Smith, Shawn Aaron, Jennifer Block, Tara Keays, Judith Leech, David Schneidermen, Jodi Cameron, Jennifer Forgie, Alicia Ring, John W. O’Quinn, Stephanie Santucci, William H. Yang A17 Efficacious use of omalizumab in the treatment of cystic fibrosis Diana Pham, Hoang Pham, Ena Gaudet, Shawn Aaron, Stephanie Santucci, William H. Yang A18 HAE with normal C1-INH with inconsistent response to C1 esterase inhibitor infusion but reliably responsive to icatibant Hoang Pham, Stephanie Santucci, William H. Yang A19 Anaphylaxis reaction to lactase enzyme Mathew R. Voisin, Rozita Borici-Mazi A20 Risk of solid tumor malignancies in patients with primary immune deficiency Kateryna Vostretsova, Donald F. Stark A21 Is it time to adopt the chromogenic assay for measuring C1 esterase inhibitor function in patients with HAE Type 2? Elizabeth Yeboah, Paul K. Keith A22 Emergency department visits for anaphylaxis and allergic reactions Michelle Martin-Rhee, Cheryl Gula, Clare Cheng, Geoff Paltser A23 START: Susceptibility To food Allergies in a Registry of Twins Alizée Dery, Ann Clarke, Kari Nadeau, Laurie Harada, Kimberley Weatherall, Celia Greenwood, Denise Daley, Yuka Asai, Moshe Ben-Shoshan A24 Qualifying the diagnostic approach employed by allergists when managing patients with self-diagnosed non-celiac gluten sensitivity (NCGS) Lee Horgan, Teresa Pun A25 Retrospective analysis on the agreement between skin prick test and serum food specific IgE antibody in adults with suspected food allergy Ling Ling, Maria B. Ospina, Kyriaki Sideri, Harissios Vliagoftis A26 Staple food hypersensitivity from infancy to adolescence: a report from the BAMSE cohort Jennifer L.P. Protudjer, Mirja Vetander, Marianne van Hage, Ola Olén, Magnus Wickman, Anna Bergström A27 Evaluating the impact of supervised epinephrine autoinjector administration during food challenges on perceived parent confidence Timothy Teoh, Christopher Mill, Tiffany Wong, Ingrid Baerg, Angela Alexander, Kyla J. Hildebrand, John Dean, Boris Kuzeljevic, Edmond S. Chan A28 Local immunoglobulin production to Aspergillus fumigatus cystic fibrosis Jonathan Argeny, Mia Gona-Hoepler, Petra Fucik, Edith Nachbaur, Saskia Gruber, Reto Crameri, Andreas Glaser, Zsolt Szépfalusi, Claudio Rhyner, Thomas Eiwegger A29 Extract consumption with skin prick test (SPT) devices Greg. Plunkett, Brad Mire A30 Evaluation of our cases with nonsteroidal anti-inflammatory drug reactions Mehtap Yazicioglu, Ceren Can, Gokce Ciplak A31 Reasons for referral and final diagnoses in a tertiary care pediatric allergy clinic Victoria E. Cook, Kyla J. Hildebrand, Elodie Portales-Casamar, Christopher Mill, Edmond S. Chan A32 Internist referral practices for inpatients with self-reported penicillin allergies at a tertiary care teaching hospital Michael N Fein, Emil P Nashi A33 Assessing the risk of reactions in children with a negative oral challenge after a subsequent use of amoxicillin Sofianne Gabrielli, Christopher Mill, Marie-Noel Primeau, Christine Lejtenyi, Elena Netchiporouk, Alizee Dery, Greg Shand, Moshe Ben-Shoshan A34 Validity of self-reported penicillin allergies Erica Hoe, Joel Liem A35 Effectiveness of allergy-test directed elimination diets in eosinophilic esophagitis Jason K. Ko, David J.T. Huang, Jorge A. Mazza A36 Allergy testing and dietary management in pediatric eosinophilic esophagitis (EoE): A retrospective review of a tertiary Canadian centre’s experience Mary McHenry, Anthony Otley,Wade Watson A37 Visualizing the impact of atopic and allergic skin disease Dominik A. Nowak, John N. Kraft A38 Cystic fibrosis with and without nasal polyposis in pediatric patients: a cross-sectional comparative study Mihaela Paina, Ahmed A. Darwish Hassan, Delia Heroux, Lynn Crawford, Gail Gauvreau, Judah Denburg, Linda Pedder, Paul K. Keith A39 Evaluation of macrolide antibiotic hypersensitivity: the role of oral challenges in children Bahar Torabi, Marie-Noel Primeau, Christine Lejtenyi, Elaine Medoff, Jennifer Mill, Moshe Ben-Shoshan A40 Venom allergy testing: is a graded approach necessary? Jaclyn A. Quirt, Xia Wen, Jonathan Kim, Angel Jimenez Herrero, Harold L. Kim A41 The role of oral challenges in evaluating cephalosporin hypersensitivity reactions in children Magdalena J. Grzyb, Marie-Noël Primeau, Christine Lejtenyi, Elaine Medoff, Jennifer Mill, Moshe Ben-Shoshan A42 Breastfeeding and infant wheeze, atopy and atopic dermatitis: findings from the Canadian Healthy Infant Longitudinal Development Study Meghan B. Azad, Zihang Lu, Allan B. Becker, Padmaja Subbarao, Piushkumar J. Mandhane, Stuart E. Turvey, Malcolm R. Sears, the CHILD Study Investigators A43 IL33 DNA methylation in bronchial epithelial cells is associated to asthma Anne-Marie Boucher-Lafleur, Valérie Gagné-Ouellet, Éric Jacques, Sophie Plante, Jamila Chakir, Catherine Laprise A44 NRF2 mediates the antioxidant response to organic dust-induced oxidative stress in bronchial epithelial cells Michael Chen, Toby McGovern, Mikael Adner, James G. Martin A45 The effects of perinatal distress, immune biomarkers and mother-infant interaction quality on childhood atopic dermatitis (rash) at 18 months Nela Cosic, Henry Ntanda, Gerald Giesbrecht, Anita Kozyrskyj, Nicole Letourneau A46 Examining the immunological mechanisms associated with cow’s milk allergy Bassel Dawod, Jean Marshall A47 Tryptase levels in children presenting with anaphylaxis to the Montréal Children’s Hospital Sarah De Schryver, Michelle Halbrich, Ann Clarke, Sebastian La Vieille, Harley Eisman, Reza Alizadehfar, Lawrence Joseph, Judy Morris, Moshe Ben-Shoshan A48 Secondhand tobacco smoke exposure in infancy and the development of food hypersensitivity from childhood to adolescence Laura Y. Feldman, Jesse D. Thacher, Inger Kull, Erik Melén, Göran Pershagen, Magnus Wickman, Jennifer L. P. Protudjer, Anna Bergström A49 Combined exposure to diesel exhaust and allergen enhances allergic inflammation in the bronchial submucosa of atopic subjects Ali Hosseini, Tillie L. Hackett, Jeremy Hirota, Kelly McNagny, Susan Wilson, Chris Carlsten A50 Comparison of skin-prick test measurements by an automated system against the manual method Saiful Huq, Rishma Chooniedass, Brenda Gerwing, Henry Huang, Diana Lefebvre, Allan Becker A51 The accurate identification and quantification of urinary biomarkers of asthma and COPD through the use of novel DIL- LC-MS/MS methods Mona M. Khamis, Hanan Awad, Kevin Allen, Darryl J. Adamko, Anas El-Aneed A52 Systemic immune pathways associated with the mechanism of Cat-Synthetic Peptide Immuno-Regulatory Epitopes, a novel immunotherapy, in whole blood of cat-allergic people Young Woong Kim, Daniel R. Gliddon, Casey P. Shannon, Amrit Singh, Pascal L. C. Hickey, Anne K. Ellis, Helen Neighbour, Mark Larche, Scott J. Tebbutt A53 Reducing the health disparities: online support for children with asthma and allergies from low-income families Erika Ladouceur, Miriam Stewart, Josh Evans, Jeff Masuda, Nicole Letourneau, Teresa To, Malcolm King A54 Epigenetic association of PSORS1C1 and asthma in the Saguenay-Lac-Saint-Jean asthma study Miriam Larouche, Liming Liang, Catherine Laprise A55 IL-33 induces cytokine and chemokine production in human mast cells Stephanie A. Legere, Ian D. Haidl, Jean-Francois Legaré, Jean S. Marshall A56 Reference ranges for lung clearance index from infancy to adolescence for Canadian population Zihang Lu, Malcolm Sears, Theo J. Moraes, Felix Ratjen, Per Gustafsson, Wendy Lou, Padmaja Subbarao A57 Kingston Allergy Birth Cohort: cohort profile and mother/child characteristics to age 2 Michelle L. North, Elizabeth Lee, Vanessa Omana, Jenny Thiele, Jeff Brook, Anne K. Ellis A58 Cow’s milk protein specific IgE, IgA and IgG4 as a predictor of outcome in oral immunotherapy Tanvir Rahman, Duncan Lejtenyi, Sarah De Schryver, Ryan Fiter, Ciriaco Piccirillo, Moshe Ben-Shoshan, Bruce Mazer A59 Age of peanut introduction and development of reactions and sensitization to peanut Elinor Simons, Allan B. Becker, Rishma Chooniedass, Kyla Hildebrand, Edmond S. Chan, Stuart Turvey, Padmaja Subbarao, Malcolm Sears A60 Multi-omic blood biomarker signatures of the late phase asthmatic response Amrit Singh, Casey P. Shannon, Young Woong Kim, Mari DeMarco, Kim-Anh Le Cao, Gail M. Gauvreau, J. Mark FitzGerald, Louis-Philippe Boulet, Paul M. O’Byrne, Scott J. Tebbutt A61 Early life gut microbial alterations in children diagnosed with asthma by three years of age Leah T. Stiemsma, Marie-Claire Arrieta, Jasmine Cheng, Pedro A. Dimitriu, Lisa Thorson, Sophie Yurist, Boris Kuzeljevic, Diana L. Lefebvre, Padmaja Subbarao, Piush Mandhane, Allan Becker, Malcolm R. Sears, Kelly M. McNagny, Tobias Kollmann, the CHILD Study Investigators, William W. Mohn, B. Brett Finlay, Stuart E. Turvey A62 The relationship between food sensitization and atopic dermatitis at age 1 year in a Canadian birth cohort Maxwell M. Tran, Diana L. Lefebvre, Chinthanie F. Ramasundarahettige, Allan B. Becker, Wei Hao Dai, Padmaja Subbarao, Piush J. Mandhane, Stuart E. Turvey, Malcolm R. Sears A63 Allergen inhalation enhances Toll-like receptor-induced thymic stromal lymphopoietin receptor expression by hematopoietic progenitor cells in mild asthmatics Damian Tworek, Delia Heroux, Seamus N. O’Byrne, Paul M. O’Byrne, Judah A. Denburg A64 The Allergic Rhinitis Clinical Investigator Collaborative – replicated eosinophilia on repeated cumulative allergen challenges in nasal lavage samples Laura Walsh, Mena Soliman, Jenny Thiele, Lisa M. Steacy, Daniel E. Adams, Anne K. Ellis A65 The CHILD Study: optimizing subject retention in pediatric longitudinal cohort research Linda Warner, Mary Ann Mauro, Robby Mamonluk, Stuart E. Turvey A66 Differential expression of C3a and C5a in allergic asthma ChenXi Yang, Amrit Singh, Casey P. Shannon, Young Woong Kim, Ed M. Conway, Scott J. Tebbutt
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Martin A, Lavoie L, Goetghebeur M, Schellenberg R. Economic benefits of subcutaneous rapid push versus intravenous immunoglobulin infusion therapy in adult patients with primary immune deficiency. Transfus Med 2012; 23:55-60. [PMID: 23167310 PMCID: PMC3580879 DOI: 10.1111/j.1365-3148.2012.01201.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 08/27/2012] [Accepted: 09/27/2012] [Indexed: 11/29/2022]
Abstract
Objective The objective of this study is to evaluate the economic benefits of immunoglobulin replacement therapy achieved subcutaneously (subcutaneous immunoglobulin, SCIG) by the rapid push method compared to intravenous infusion therapy (intravenous immunoglobulin, IVIG) in primary immune deficiency (PID) patients from the healthcare system perspective in the context of the adult SCIG home infusion program based at St Paul's Hospital, Vancouver, Canada. Materials and methods SCIG and IVIG options were compared in cost-minimisation and budget impact models (BIMs) over 3 years. Sensitivity analyses were performed for both models to evaluate the impact of varying modality of IVIG treatments and proportion of patients switching from IVIG to SCIG. Results The cost-minimisation model estimated that SCIG treatment reduced cost to the healthcare system per patient of $5736 over 3 years, principally because of less use of hospital personnel. This figure varied between $5035 and $8739 depending on modality of IVIG therapy. Assuming 50% of patients receiving IVIG switched to SCIG, the BIM estimated cost savings for the first 3 years at $1·308 million or 37% of the personnel and supply budget. These figures varied between $1·148 million and $2·454 million (36 and 42%) with varying modalities of IVIG therapy. If 75% of patients switched to SCIG, the reduced costs reached $1·962 million or 56% of total budget. Conclusion This study demonstrated that from the health system perspective, rapid push home-based SCIG was less costly than hospital-based IVIG for immunoglobulin replacement therapy in adult PID patients in the Canadian context.
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Affiliation(s)
- A Martin
- St Paul's Hospital, Vancouver, BC, Canada.
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Martin A, Schellenberg R. Evaluation of safety and efficacy of a 20% Subcutaneous Immunoglobulin (Hizentra™), after a dose equivalent switch from intravenous or subcutaneous replacement therapy in a cohort of primary immunodeficient patients. Allergy Asthma Clin Immunol 2012. [PMCID: PMC3487820 DOI: 10.1186/1710-1492-8-s1-a19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Martin A, Lavoie L, Goetghebeur M, Schellenberg R. Economic benefit of subcutaneous rapid push versus intravenous immunoglobulin infusion therapy in adult patients with primary immune deficiency. Allergy Asthma Clin Immunol 2012. [PMCID: PMC3487819 DOI: 10.1186/1710-1492-8-s1-a20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
Urticaria (hives) is a common disorder that often presents with angioedema (swelling that occurs beneath the skin). It is generally classified as acute, chronic or physical. Second-generation, non-sedating H1-receptor antihistamines represent the mainstay of therapy for both acute and chronic urticaria. Angioedema can occur in the absence of urticaria, with angiotensin-converting enzyme (ACE) inhibitor-induced angioedema and idiopathic angioedema being the more common causes. Rarer causes are hereditary angioedema (HAE) or acquired angioedema (AAE). Although the angioedema associated with these disorders is often self-limited, laryngeal involvement can lead to fatal asphyxiation in some cases. The management of HAE and AAE involves both prophylactic strategies to prevent attacks of angioedema (i.e., trigger avoidance, attenuated androgens, tranexamic acid, and plasma-derived C1 inhibitor replacement therapy) as well as pharmacological interventions for the treatment of acute attacks (i.e., C1 inhibitor replacement therapy, ecallantide and icatibant). In this article, the authors review the causes, diagnosis and management of urticaria (with or without angioedema) as well as the work-up and management of isolated angioedema, which vary considerably from that of angioedema that occurs in the presence of urticaria.
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Affiliation(s)
- Amin Kanani
- Division of Allergy and Immunology, Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
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Bowen T, Cicardi M, Farkas H, Bork K, Longhurst HJ, Zuraw B, Aygoeren-Pürsün E, Craig T, Binkley K, Hebert J, Ritchie B, Bouillet L, Betschel S, Cogar D, Dean J, Devaraj R, Hamed A, Kamra P, Keith PK, Lacuesta G, Leith E, Lyons H, Mace S, Mako B, Neurath D, Poon MC, Rivard GE, Schellenberg R, Rowan D, Rowe A, Stark D, Sur S, Tsai E, Warrington R, Waserman S, Ameratunga R, Bernstein J, Björkander J, Brosz K, Brosz J, Bygum A, Caballero T, Frank M, Fust G, Harmat G, Kanani A, Kreuz W, Levi M, Li H, Martinez-Saguer I, Moldovan D, Nagy I, Nielsen EW, Nordenfelt P, Reshef A, Rusicke E, Smith-Foltz S, Späth P, Varga L, Xiang ZY. 2010 International consensus algorithm for the diagnosis, therapy and management of hereditary angioedema. Allergy Asthma Clin Immunol 2010; 6:24. [PMID: 20667127 PMCID: PMC2921362 DOI: 10.1186/1710-1492-6-24] [Citation(s) in RCA: 326] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Accepted: 07/28/2010] [Indexed: 01/13/2023]
Abstract
BACKGROUND We published the Canadian 2003 International Consensus Algorithm for the Diagnosis, Therapy, and Management of Hereditary Angioedema (HAE; C1 inhibitor [C1-INH] deficiency) and updated this as Hereditary angioedema: a current state-of-the-art review: Canadian Hungarian 2007 International Consensus Algorithm for the Diagnosis, Therapy, and Management of Hereditary Angioedema. OBJECTIVE To update the International Consensus Algorithm for the Diagnosis, Therapy and Management of Hereditary Angioedema (circa 2010). METHODS The Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH) http://www.haecanada.com and cosponsors University of Calgary and the Canadian Society of Allergy and Clinical Immunology (with an unrestricted educational grant from CSL Behring) held our third Conference May 15th to 16th, 2010 in Toronto Canada to update our consensus approach. The Consensus document was reviewed at the meeting and then circulated for review. RESULTS This manuscript is the 2010 International Consensus Algorithm for the Diagnosis, Therapy and Management of Hereditary Angioedema that resulted from that conference. CONCLUSIONS Consensus approach is only an interim guide to a complex disorder such as HAE and should be replaced as soon as possible with large phase III and IV clinical trials, meta analyses, and using data base registry validation of approaches including quality of life and cost benefit analyses, followed by large head-to-head clinical trials and then evidence-based guidelines and standards for HAE disease management.
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Affiliation(s)
- Tom Bowen
- Departments of Medicine and Paediatrics, University of Calgary, Calgary, Alberta, Canada
| | - Marco Cicardi
- Department of Internal Medicine, Universita degli Studi di Milano, Ospedale L. Sacco, Milan, Italy
| | - Henriette Farkas
- 3rd Department of Internal Medicine, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Konrad Bork
- Department of Dermatology, University Hospital of the Johannes Gutenberg-University of Mainz, Mainz, Germany
| | - Hilary J Longhurst
- Department of Immunology, Barts and the London NHS Trust, London, England, UK
| | - Bruce Zuraw
- University of California, San Diego, San Diego, California, USA
| | | | - Timothy Craig
- Departments of Medicine and Pediatrics, Penn State University, Hershey, Pennsylvania, USA
| | - Karen Binkley
- Department of Medicine, University of Toronto, Toronto, Canada
| | - Jacques Hebert
- Department of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Bruce Ritchie
- Departments of Medicine and Medical Oncology, University of Alberta, Edmonton, Alberta, Canada
| | | | | | - Della Cogar
- Member, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH). 705 South Tower, 3031 Hospital Dr. NW, Calgary, Alberta, Canada
- Portage La Prairie, Manitoba, Canada
| | - John Dean
- Department of Pediatrics, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Azza Hamed
- Memorial University and Janeway Child Health Centre, St. John's, Newfoundland, Canada
| | - Palinder Kamra
- Memorial University and Janeway Child Health Centre, St. John's, Newfoundland, Canada
| | - Paul K Keith
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Gina Lacuesta
- Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Eric Leith
- Department of Medicine, University of Toronto, Oakville, Ontario, Canada
| | - Harriet Lyons
- Member, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH). 705 South Tower, 3031 Hospital Dr. NW, Calgary, Alberta, Canada
- Ancaster, Ontario, Canada
| | - Sean Mace
- Department of Medicine, University of Toronto, Toronto, Canada
| | - Barbara Mako
- Member, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH). 705 South Tower, 3031 Hospital Dr. NW, Calgary, Alberta, Canada
- St. Catharines, Ontario, Canada; Member and Chair, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH
| | - Doris Neurath
- Transfusion Medicine, Ottawa Hospital, Ottawa, Ontario, Canada
| | - Man-Chiu Poon
- Department of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Georges-Etienne Rivard
- Department of Pediatrics, CHU Sainte-Justine, University of Montreal, Montreal, Quebec, Canada
| | - Robert Schellenberg
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Dereth Rowan
- Member, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH). 705 South Tower, 3031 Hospital Dr. NW, Calgary, Alberta, Canada
- Ancaster, Ontario, Canada
| | - Anne Rowe
- Member, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH). 705 South Tower, 3031 Hospital Dr. NW, Calgary, Alberta, Canada
- Halifax, Nova Scotia, Canada
| | - Donald Stark
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Ellie Tsai
- Queen's University, Kingston, Ontario, Canada
| | - Richard Warrington
- Department of Medicine, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Susan Waserman
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | | | - Jonathan Bernstein
- Department of Internal Medicine, University of Cincinnati, Cincinnati, Ohio, USA
| | - Janne Björkander
- Department of Clinical and Experimental Medicine, County Hospital Ryhov, Jönköping, Sweden
| | - Kristylea Brosz
- Member, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH). 705 South Tower, 3031 Hospital Dr. NW, Calgary, Alberta, Canada
- Calgary, Alberta, Canada
| | - John Brosz
- Member, Patient Advisory Committee, Canadian Hereditary Angioedema Network (CHAEN)/Réseau Canadien d'angioédème héréditaire (RCAH). 705 South Tower, 3031 Hospital Dr. NW, Calgary, Alberta, Canada
- Calgary, Alberta, Canada
| | - Anette Bygum
- Department of Dermatology and Allergy Centre, Odense University Hospital, Denmark
| | | | - Mike Frank
- Duke University Medical Center, Durham, North Carolina, USA
| | - George Fust
- 3rd Department of Internal Medicine, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | | | - Amin Kanani
- Department of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Wolfhart Kreuz
- Johann Wolfgang Goethe University, Frankfurt/Main, Germany
| | - Marcel Levi
- Dept of Medicine, Academic Medical Center, Amsterdam Area, Netherlands
| | - Henry Li
- Institute for Asthma & Allergy, Wheaton and Chevy Chase, Maryland, USA
| | | | - Dumitru Moldovan
- 4th Medical Clinic, University of Medicine and Pharmacy, Tirgu Mures, Romania
| | - Istvan Nagy
- Hungarian Association of Angioedema Patients, Budapest, Hungary
| | | | | | - Avner Reshef
- Tel Hashomer, and Sackler Faculty of Medicine, Tel Aviv University, Ramat Aviv, Israel
| | - Eva Rusicke
- Johann Wolfgang Goethe University, Frankfurt/Main, Germany
| | - Sarah Smith-Foltz
- Asociación Española de Angioedema Familiar por Deficiencia del inhibidor de C1 (AEDAF), Madrid, Spain
| | - Peter Späth
- Institute of Pharmacology, University of Bern, Switzerland
| | - Lilian Varga
- 3rd Department of Internal Medicine, Faculty of Medicine, Semmelweis University, Budapest, Hungary
| | - Zhi Yu Xiang
- Peking Union Medical College Hospital, Beijing, China
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Bowen T, Cicardi M, Bork K, Zuraw B, Frank M, Ritchie B, Farkas H, Varga L, Zingale LC, Binkley K, Wagner E, Adomaitis P, Brosz K, Burnham J, Warrington R, Kalicinsky C, Mace S, McCusker C, Schellenberg R, Celeste L, Hebert J, Valentine K, Poon MC, Serushago B, Neurath D, Yang W, Lacuesta G, Issekutz A, Hamed A, Kamra P, Dean J, Kanani A, Stark D, Rivard GE, Leith E, Tsai E, Waserman S, Keith PK, Page D, Marchesin S, Longhurst HJ, Kreuz W, Rusicke E, Martinez-Saguer I, Aygören-Pürsün E, Harmat G, Füst G, Li H, Bouillet L, Caballero T, Moldovan D, Späth PJ, Smith-Foltz S, Nagy I, Nielsen EW, Bucher C, Nordenfelt P, Xiang ZY. Hereditary angiodema: a current state-of-the-art review, VII: Canadian Hungarian 2007 International Consensus Algorithm for the Diagnosis, Therapy, and Management of Hereditary Angioedema. Ann Allergy Asthma Immunol 2008; 100:S30-40. [PMID: 18220150 DOI: 10.1016/s1081-1206(10)60584-4] [Citation(s) in RCA: 152] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND We published the Canadian 2003 International Consensus Algorithm for the Diagnosis, Therapy, and Management of Hereditary Angioedema (HAE; C1 inhibitor [C1-INH] deficiency) in 2004. OBJECTIVE To ensure that this consensus remains current. METHODS In collaboration with the Canadian Network of Rare Blood Disorder Organizations, we held the second Canadian Consensus discussion with our international colleagues in Toronto, Ontario, on February 3, 2006, and reviewed its content at the Fifth C1 Inhibitor Deficiency Workshop in Budapest on June 2, 2007. Papers were presented by international investigators, and this consensus algorithm approach resulted. RESULTS This consensus algorithm outlines the approach recommended for the diagnosis, therapy, and management of HAE, which was agreed on by the authors of this report. This document is only a consensus algorithm approach and continues to require validation. As such, participants agreed to make this a living 2007 algorithm, a work in progress, and to review its content at future international HAE meetings. CONCLUSIONS There is a paucity of double-blind, placebo-controlled trials on the treatment of HAE, making levels of evidence to support the algorithm less than optimal. Controlled trials currently under way will provide further insight into the management of HAE. As with our Canadian 2003 Consensus, this 2007 International Consensus Algorithm for the Diagnosis, Therapy, and Management of HAE was formed through the meeting and agreement of patient care professionals along with patient group representatives and individual patients.
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Affiliation(s)
- Tom Bowen
- Department of Medicine and Paediatrics, University of Calgary, Alberta, Canada.
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Mansouri D, Adimi P, Mirsaedi M, Mansouri N, Tabarsi P, Amiri M, Jamaati HR, Motavasseli M, Baghaii N, Cheraghvandi A, Rouhi R, Roozbahany NA, Zahirifard S, Mohammadi F, Masjedi MR, Velayati AA, Casanova JL, Speert DP, Elwood RK, Schellenberg R, Turvey SE. Primary immune deficiencies presenting in adults: seven years of experience from Iran. J Clin Immunol 2007; 25:385-91. [PMID: 16133995 DOI: 10.1007/s10875-005-4124-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/10/2005] [Indexed: 10/25/2022]
Abstract
Primary immunodeficiencies (PIDs) are not solely diseases of childhood. We describe the clinical presentation and outcome for 55 adult patients with previously unrecognized PIDs. This series provides unique data regarding PIDs presenting in adulthood, and serves as a timely reminder that physicians must consider the diagnosis of PIDs in their adult patients. Using the experience gained from these patients, we outline key "warning signs" suggestive of an underlying PID. Only through increased physician awareness will patients with PIDs receive timely diagnosis and optimal management.
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Affiliation(s)
- Davood Mansouri
- National Research Institute for Tuberculosis and Lung Diseases, Masih Daneshvary Hospital, Shahid Beheshti University of Medical Sciences, Darabad, Tehran, Iran.
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Schellenberg R, Keith P, Desrosiers M, Waserman S. Physicians' Perspectives of Allergic Rhinitis (AR) in Canada. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Altman AD, McLaughlin J, Schellenberg R, Penner C, Arbour L, Tsang P, Ballem P, Lim KI. Hereditary Angioedema Managed with Low-Dose Danazol and C1 Esterase Inhibitor Concentrate: A Case Report. Journal of Obstetrics and Gynaecology Canada 2006; 28:27-31. [PMID: 16533452 DOI: 10.1016/s1701-2163(16)32048-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Hereditary angioedema (HAE) is a rare life-threatening disease that can occur in pregnancy. CASE A nulliparous woman was diagnosed as having HAE at 22 weeks of gestation after a series of symptomatic episodes. Following an initial course of C1 esterase inhibitor (C1EI) therapy for an acute episode of HAE, she was treated with danazol for prophylaxis. Danazol did not prevent recurrence of symptoms, its use was discontinued after six weeks. Thereafter, the patient was treated exclusively with C1EI at weekly intervals for exacerbations of her HAE. At 37 weeks' gestation, she delivered healthy 3050 g female neonate. At the time of discharge the female neonate had no signs of virilization or congenital anomalies. CONCLUSION Low dose danazol was ineffective in treating this woman's HAE in pregnancy. The use of C1EI in pregnancy is associated with good outcomes.
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Affiliation(s)
- Alon D Altman
- Department of Obstetrics and Gynaecology, Dalhousie University, Halifax NS
| | | | - Robert Schellenberg
- Division of Allergy and Immunology, Department of Medicine, University of British Columbia, Vancouver BC
| | - Charles Penner
- Department of Internal Medicine, St. Joseph's General Hospital Comox BC
| | - Laura Arbour
- Department of Medical Genetics, University of British Columbia Vancouver BC
| | - Peter Tsang
- Division of Hematology, Department of Medicine, University of British Columbia, Vancouver BC
| | - Penny Ballem
- Division of Hematology, Department of Medicine, University of British Columbia, Vancouver BC
| | - Kenneth I Lim
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver BC
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Lam S, leRiche JC, McWilliams A, Macaulay C, Dyachkova Y, Szabo E, Mayo J, Schellenberg R, Coldman A, Hawk E, Gazdar A. A randomized phase IIb trial of pulmicort turbuhaler (budesonide) in people with dysplasia of the bronchial epithelium. Clin Cancer Res 2005; 10:6502-11. [PMID: 15475437 DOI: 10.1158/1078-0432.ccr-04-0686] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Preclinical studies suggest that inhaled budesonide may be an effective chemopreventive agent for lung cancer. We conducted a phase IIb study to determine the effects of inhaled budesonide in smokers with bronchial dysplasia. EXPERIMENTAL DESIGN A total of 112 smokers with more than or equal to one site of bronchial dysplasia > 1.2 mm in size identified by autofluorescence bronchoscopy-directed biopsy was randomly assigned to receive placebo or budesonide (Pulmicort Turbuhaler) 800 microg twice daily inhalation for 6 months. The primary end point was change in the histopathologic grade on repeat biopsy of the same sites at the end of 6 months. RESULTS There were no significant differences in the regression or progression rates of bronchial dysplasia between the two groups. There was a statistically significant but modest decrease in p53 and BclII expression in the bronchial biopsies after 6 months of Pulmicort Turbuhaler versus placebo (P = 0.01 and P = 0.001, respectively). There was a small but statistically significant decrease in the proportion of computed tomography-detected lung nodules after Pulmicort Turbuhaler compared with placebo (P = 0.024). CONCLUSIONS Our results suggest that in smokers, inhaled budesonide in the dose of 1600 microg daily for 6 months had no effect in regression of bronchial dysplastic lesions or prevention of new lesions. Budesonide treatment resulted in a modest decrease in p53 and BclII protein expression in bronchial biopsies and a slightly higher rate of resolution of computed tomography-detected lung nodules. Whether budesonide truly has an effect in preneoplastic lesions in the peripheral airways and alveoli requires additional investigation.
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Affiliation(s)
- Stephen Lam
- Department of Respiratory Medicine, British Columbia Cancer Agency and the University of British Columbia, Vancouver, British Columbia, Canada.
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Abstract
To investigate the hypothesis that early treatment of a migraine attack with sumatriptan, while pain is still mild, results in higher pain free rates in comparison to delayed treatment, when pain is at least moderate, we performed a prospective, controlled and open label study. Migraineurs with or without aura who fulfilled the diagnostic criteria recommended by the International Headache Society were enrolled in the study and randomly assigned to either 'early' or 'late' treatment with sumatriptan 100 mg tablets. In the early treatment group significantly more patients were pain free at all times measured during two hours after dosing than in the late treatment group. Furthermore, patients in the early treatment group became pain free significantly sooner after dosing than patients who delayed treatment. It is concluded that migraineurs, who are able to differentiate between a migraine attack and other forms of headache, benefit from early intervention with sumatriptan 100 mg tablets.
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Affiliation(s)
- J Scholpp
- Medical Department, GlaxoSmithKline, Muenchen, Germany.
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19
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Schellenberg R, Sauer S, Abourashed EA, Koetter U, Brattström A. The fixed combination of valerian and hops (Ze91019) acts via a central adenosine mechanism. Planta Med 2004; 70:594-597. [PMID: 15254851 DOI: 10.1055/s-2004-827180] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The aim of the study was to demonstrate competition between caffeine and a fixed valerian/hop extract combination (Ze91019) by the central adenosine mechanism. EEG was used to describe the action of caffeine on the central nervous system after oral administration (200 mg) in healthy volunteers. In addition to caffeine, the volunteers (16 in each group) received either placebo or verum (2 and 6 tablets containing the valerian/hop extract). The EEG responses were recorded every 30 min thereafter. The verum medication was capable of reducing (2 tablets) or inhibiting (6 tablets) the arousal induced by caffeine. This pharmacodynamic action was observed 60 minutes after oral administration, indicating not only competition between the antagonist caffeine and the partial agonist, i. e., the valerian/hop extract but also bio-availability of the compound(s) responsible for the agonistic action. In conclusion, the valerian/hop extract acts via a central adenosine mechanism which is possibly the reason for its sleep-inducing and -maintaining activity.
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Affiliation(s)
- R Schellenberg
- Institut für Ganzheitliche Medizin und Wissenschaft, Hüttenberg, Germany
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20
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Schellenberg R. President’s Message. Allergy Asthma Clin Immunol 2004. [DOI: 10.2310/7480.2005.00001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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21
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Abstract
OBJECTIVES To compare the efficacy and tolerability of agnus castus fruit (Vitex agnus castus L extract Ze 440) with placebo for women with the premenstrual syndrome. DESIGN Randomised, double blind, placebo controlled, parallel group comparison over three menstrual cycles. SETTING General medicine community clinics. PARTICIPANTS 178 women were screened and 170 were evaluated (active 86; placebo 84). Mean age was 36 years, mean cycle length was 28 days, mean duration of menses was 4.5 days. INTERVENTIONS Agnus castus (dry extract tablets) one tablet daily or matching placebo, given for three consecutive cycles. MAIN OUTCOME MEASURES Main efficacy variable: change from baseline to end point (end of third cycle) in women's self assessment of irritability, mood alteration, anger, headache, breast fullness, and other menstrual symptoms including bloating. Secondary efficacy variables: changes in clinical global impression (severity of condition, global improvement, and risk or benefit) and responder rate (50% reduction in symptoms). RESULTS Improvement in the main variable was greater in the active group compared with placebo group (P<0.001). Analysis of the secondary variables showed significant (P<0.001) superiority of active treatment in each of the three global impression items. Responder rates were 52% and 24% for active and placebo, respectively. Seven women reported mild adverse events (four active; three placebo), none of which caused discontinuation of treatment. CONCLUSIONS Dry extract of agnus castus fruit is an effective and well tolerated treatment for the relief of symptoms of the premenstrual syndrome.
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Affiliation(s)
- R Schellenberg
- Institute for Health Care and Science, 35625 Hüttenberg, Germany.
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Todorova A, Schellenberg R, Hofmann HC, Dimpfel W. Effect of the external nasal dilator Breathe Right on snoring. Eur J Med Res 1998; 3:367-79. [PMID: 9707518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
This clinical trial was designed to evaluate the efficacy of the external nasal dilator Breathe Right (nasal strip) on snoring. The assessment of snoring intensity and duration as well as the sleep quality without the Breathe Right nasal strip and after application was performed in 30 out-patients with primary habitual snoring. An all-night polysomnographic investigation including registration of a17-channel EEG, EMG, respiration parameters such as breathing efforts and nasal/oral air flow, snoring vibrations, ECG, oxygen saturation, etc. was conducted in the sleep laboratory of Pro Science Private Research Clinic GmbH. The drug-free strip Breathe Right was able to reduce the maximum snoring intensity (maximum snoring vibration) throughout the night (p = 0.02, sign test), especially during the superficial sleep (sleep stage 1 and 2). The snoring intensity remained almost unchanged during slow wave sleep (SWS) and REM. In comparison with the baseline the maximum snoring intensity was reduced during the second treatment night in 22 of the 30 investigated snorers. The differentiation between snorers with and without obstructive sleep apnea and between mild and heavy snorers allowed to state that especially the snorers without apnea and the time in bed, TIB) can achieve a reduction of the maximum snoring intensity using the strip. Moreover, the number of snores per hour TIB (snoring index, SI) was reduced after application of the nasal strip for the snores with an intensity greater than 20 dB (p = 0.02, sign test). The sleep architecture remained almost unchanged, although the nasal strip led subjectively (SF-A questionnaire) to an improvement of sleep quality. The overall estimation of the subjective efficacy rating revealed that 17 of 30 patients (second treatment night) needed a certain period of time to accustom to the nasal strip. After that they could breathe easily, slept well and felt recuperated in the following morning. No adverse events were observed after adhesion of the nasal strip, except for one patient, who had the sensation as if they needed to sneeze for a short time after the first application of the nasal strip. Consequently, Breathe Right is a safe and easily applied noninvasive method to reduce the maximum snoring intensity, especially in habitual mild snorers.
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Affiliation(s)
- A Todorova
- Pro Science Private Research Clinic GmbHmed. Forschung und Entwicklung, Kurt-Schumacher-Strasse 9, D-35440 Linden, Germany
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23
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Schellenberg R, Sauer S, Dimpfel W. Pharmacodynamic effects of two different hypericum extracts in healthy volunteers measured by quantitative EEG. Pharmacopsychiatry 1998; 31 Suppl 1:44-53. [PMID: 9684947 DOI: 10.1055/s-2007-979345] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A double-blind, randomized, placebo-controlled parallel-group trial (phase I) was performed to evaluate the central pharmacodynamic effects of two hypericum extracts with different contents of hyperforin (0.5% and 5.0%) but identical hypericin content. Three groups of 18 volunteers between 18 and 35 years of age participated in the trial. The volunteers receiving verum took 900 mg of the extract once a day for 8 consecutive days. The primary aim of this study was to observe the frequency bands, i.e., delta (1.25-4.5 Hz), theta (4.75-6.75 Hz), alpha-1 (7.0-9.5 Hz), alpha-2 (9.75-12.5 Hz), beta-1 (12.75-18.5 Hz), and beta-2 (18.75-35 Hz). This was the first study of its kind testing hypericum controlled on the basis of its hyperforin contents. A quantitative topographic EEG (qEEG) was performed on days 1 and 8 as an indicator of drug-induced pharmacological action. The volunteers' electrophysiological data were obtained prior to application and 2, 4, 6, 8, and 10 hours post administration. Plasma samples for evaluation of the pharmacokinetics of hyperforin were also obtained. The qEEG results of the placebo group on days 1 and 8 showed no significant changes with regard to their physiological daily rhythm. In both verum groups (0.5% and 5.0% hyperforin content), reproducible central pharmacodynamic effects were apparent in comparison to placebo, in particular with the extract containing 5.0% of hyperforin. A peak pharmacodynamic efficacy was observed between 4 and 8 hours post administration. These results were confirmed on day 8 of the trial. The extract containing 5.0% hyperforin showed a marked tendency to produce higher increases in qEEG baseline power performances than the one containing 0.5% hyperforin. These higher baseline outputs on day 8 were seen at the delta, theta, and alpha-1 frequency values. Compared to placebo there was a significant increase in qEEG power performance in the delta and beta-1 frequency values exclusively for the extract containing 5.0% hyperforin. The theta and alpha-1 frequency values showed a noticeable tendency more emphasized on day 8 than on day 1. Preclinical trials in rats have been observed with similar changes in the frequency bands mentioned above, especially in the cholinergic (delta), noradrenergic (theta) and serotonergic (alpha) neurotransmitter systems. These experimental findings suggest that hypericum extracts with a high hyperforin content have a shielding effect on the central nervous system.
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Affiliation(s)
- R Schellenberg
- Pro Science Private Research Clinic GmbH, Linden, Germany
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24
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Sauer S, Schellenberg R, Hofmann HC, Dimpfel W. Functional imaging of headache - first steps in an objective quantitative classification of migraine. Eur J Med Res 1997; 2:367-76. [PMID: 9300933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A highly sensitive quantitative-topographical EEG was used in order to define first steps in an objective classification of migraine. A 17-channel quantitative EEG was recorded in 30 patients suffering from migraine with or without aura during the painfree interval. These EEG s were compared to EEGs of age related healthy norm groups using a new statistical tool called the Aberration Index. A focal aberration in the area of pain was detected in 26 out of the 30 patients mostly due to an increase of alpha1 EEG power (23 patients). Alpha2 or theta power were also increased in several patients. Furthermore, a decrease in alpha power neighbouring the focus was found in 18 patients and a contralateral reduction of alpha power was seen in 16 patients. No difference was detected between migraine with aura and migraine without aura.
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Affiliation(s)
- S Sauer
- Pro Science Private Research Institute GmbH, med. Forschung und Entwicklung, Kurt-Schumacher-Str. 9, Linden D-35440, Germany
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25
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Schellenberg R, Todorova A, Wedekind W, Schober F, Dimpfel W. Pathophysiology and psychopharmacology of dementia--a new study design. 2. Cyclandelate treatment--a placebo-controlled double-blind clinical trial. Neuropsychobiology 1997; 35:132-42. [PMID: 9170118 DOI: 10.1159/000119334] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The aim of this randomized, double-blind, placebo-controlled 16-week study was to investigate the clinical efficacy of cyclandelate (Natil, 1,600 mg/day) in 139 adult outpatients with cognitive impairment (70 allocated to cyclandelate; 69 to placebo). Quantitative-topological EEG, event-related potentials (P300) and psychophysiological interview-based rating scales were used. The efficacy of cyclandelate was demonstrated in the confirmatory statistical sense using a global Hailperin-Rüger test on 10 predefined primary variables at global significance level of 0.05 relating to psychopathology, psychometry, neuropsychophysiology and behavior. At psychopathological and behavioral level the reduction of the total scores of the rating scales (Alzheimer Disease Assessment Scale, Sandoz Clinical Assessment Geriatric Scale, and Nürnberger Selbsteinschätzungs-Liste) following a 16-week therapy revealed also an individual significant cyclandelate-placebo distinction in the confirmatory statistical sense. A difference between verum and placebo was also observed by the increase of the number of correct answers during performance of the number symbol test (psychometrical level). The objective electrophysiological data (neuropsychophysiological level) support these findings. Of particular interest is that following cyclandelate treatment the absolute theta power remained almost unchanged and an increase of P300 amplitude was observed. At the same time placebo led to a distinct theta power increase and a decrease of P300 amplitude, which was interpreted as the reflection of an impairment of the initial clinical state. Summarizing, cyclandelate proved to be efficacious compared to placebo in patients with mild to moderate cognitive impairment.
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Affiliation(s)
- R Schellenberg
- Pro Science Private Research Institute GmbH, Linden, Germany
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26
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Fanelsa A, Schellenberg R, Hillebrecht FU, Kisker E, Menchero JG, Kaduwela AP, Fadley CS. Magnetic dichroism in core-level x-ray photoemission with unpolarized excitation. Phys Rev B Condens Matter 1996; 54:17962-17965. [PMID: 9985931 DOI: 10.1103/physrevb.54.17962] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Dimpfel W, Hofmann HC, Prohaska A, Schober F, Schellenberg R. Source density analysis of functional topographical EEG: monitoring of cognitive drug action. Eur J Med Res 1996; 1:283-90. [PMID: 9367941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Electrical changes of the brain induced by mental work in the presence or absence of a drug formulation containing dimethylaminoethanolorotrate (DMAE), vitamins and minerals were analysed. Sixty elderly volunteers (30 females and 30 males; aged 40 - 65) who lacked concentration and efficiency during mental exercise according to their own opinions participated in a double-blind, placebo-controlled study. The EEG recordings were carried out before and after 12 weeks medication and were analysed according to the electrical charges at the scalp surface (Laplacian estimate) followed by Fast Fourier Transformation to obtain quantitative data. Whereas no change of electrical charge could be observed after 12 weeks of treatment in the placebo group, the verum group taking 1 capsule per day of an established drug containing a biogenic amine-vitamin combination revealed decreases in theta power during rest and increases in absolute theta power induced by mental demand within the area known to change its electrical activity during mental exercise. In the light of the current hypothesis that high theta resting power and low increases at frontotemporal brain areas during mental work indicate mental impairment, treatment with the drug under investigation was seen to successfully reverse these changes. This drug effect was localized in the frontotemporal cortex in a statistically significant manner during both the memory and the symbol recognition tests. The observed effect is fully consistent with a previous study using Fourier transformed data from conventional EEG voltage recordings. It can be concluded that an analysis of EEG data by means of the charge mode provides an excellent tool to quantify drug effects especially in cognitive research. A second perspective arises from the fact that it should be possible to recognize mental impairments at a very early stage by using this method, thus providing the possibility of an early treatment.
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Affiliation(s)
- W Dimpfel
- Pro Science Private Research Institute GmbH, Kurt-Schumacher-Str. 9, Linden D-35440, Germany
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28
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Gerber WD, Schellenberg R, Thom M, Haufe C, Bölsche F, Wedekind W, Niederberger U, Soyka D. Cyclandelate versus propranolol in the prophylaxis of migraine--a double-blind placebo-controlled study. Funct Neurol 1995; 10:27-35. [PMID: 7649498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The aim of the present study was to ascertain the comparative efficacy of cyclandelate, a migraine prophylactic with calcium overload blocking properties, versus propranolol, a non-selective beta-adrenergic blocker, and placebo. Based on different statistical analysis procedures (including time series analysis) a responder and nonresponder evaluation for cyclandelate and propranolol was performed. In addition, an attempt was made to identify the dose relationship of the various drugs on headache parameters. In a double-blind placebo-controlled study 84 patients were treated in a placebo run-in phase (4 weeks). The patients were then randomized by the statistical criterion of placebo responder and nonresponder to either the cyclandelate or the propranolol group. The total treatment period included a low-dosage phase (8 weeks) and high-dosage phase (8 weeks). All patients kept a headache diary before, during and after treatment. The data were assessed by time series analysis (ARIMA), as well as by analysis of variance and nonparametric statistics. Based on ARIMA statistics, 39.3% of the patients showed a significant improvement of migraine during treatment with cyclandelate compared with 29.4% placed on propranolol. Higher doses of cyclandelate and propranolol were more effective. Using the qualitative response-criterion of a 50% reduction in migraine symptoms, cyclandelate showed a response in 67.9% and propranolol in 41.2% of all cases. It can therefore be concluded that cyclandelate as well as propranolol are two comparable substances in the prophylactic treatment of migraine, with cyclandelate showing fewer side effects.
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Affiliation(s)
- W D Gerber
- Department of Medical Psychology, University of Kiel, Germany
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29
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Schellenberg R, Todorova A, Dimpfel W, Schober F. Pathophysiology and psychopharmacology of dementia--a new study design. I. Diagnosis comprising subjective and objective criteria. Neuropsychobiology 1995; 32:81-97. [PMID: 7477806 DOI: 10.1159/000119219] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In a double-blind placebo-controlled psychopharmacological study 263 patients with cognitive impairment were screened and 137 of them were selected (following defined inclusion and exclusion criteria) to participate in a clinical trial (for results of treatment phase see part II, in preparation). The pretreatment state was evaluated twice using quantitative-topological EEG (qEEG) and psychopathological rating scales. There is a significant correlation between total score values of nearly all dementia-specific neuropsychological rating scales and absolute spectral power in the lower frequency ranges (delta, theta, alpha 1) at rest. In order to increase the diagnostic power, qEEG was recorded simultaneously with the performance in four different psychometric tests. It was found that the worse the psychopathological rating of a patient, the higher the absolute theta power at rest and the smaller the test- and demand-dependent further increase in theta power. The percentage of task-induced power increase in delta and theta frequency range appeared to be an efficient indicator for a reliable discrimination between healthy elderly individuals and demented patients (rank correlation coefficient for theta in F7: r = +0.55), which will also serve for evaluation of treatment.
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Affiliation(s)
- R Schellenberg
- Pro Science Private Research Institute GmbH, Linden, Germany
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30
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Abstract
The aim of this study was to investigate the activation process of the central nervous system during mental demand in a complex psychophysiological situation. A 17-channel quantitative topographical EEG was recorded in 48 healthy volunteers (male and female, aged 49 +/- 6 years), using the CATEEM system, during four different psychometric tests (simple reaction time measurement, concentration performance, figure detection and word recall test). The mental load varied with each test, producing a graduated increase in spectral power density in delta and theta frequency range on the EEG in the fronto-temporal, parietal and occipital regions of the cortex and a generalized decrease in alpha power. During the rest periods after each test a graduated increase in alpha 1 power was seen as a possible expression of change in vigilance level. With this method we were able to differentiate two effects of psychometric tests on brain activity: the actual mental demand itself and the influence on the vigilance level.
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Affiliation(s)
- F Schober
- Pro Science Private Research Institute, Linden, Germany
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31
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Schober F, Schellenberg R, Dimpfel W. [A new method for assessment of mental performance during simultaneous, quantitative, topographical electroencephalometry and psychometry in pharmacology. Proof of the effect of a combination of biogenic amines, vitamins, minerals and trace elements]. Arzneimittelforschung 1994; 44:1285-95. [PMID: 7848346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Assessment of the Mental Performance during Simultaneous Quantitative Topographical Electroencephalometry and Psychometry in Pharmacology/Proof of influence of a biogenic amine-vitamin combination. The aim of this study was to verify the effect of a combination medicine (Vita-Gerin-Geistlich) on the human EEG pattern during psychometric (cognitive) tests given to 43 patients with poor concentration and thinking problems. A randomised, parallel, placebo-controlled double-blind study was performed. Applying 17-channel quantitative electroencephalometry and psychometric tests simultaneously this study revealed a test-dependent increase in absolute spectral EEG power in the delta and theta frequency bands, mainly observed in the frontotemporal cortex. After 8 weeks the increase in EEG power differed significantly with respect to taking placebo and verum (1 capsule/day). Verum caused a stronger rise in spectral delta and theta power, the psychometric test performance also improved. Both effects could be verified statistically. The novel EEG-controlled psychometric test set (enabling artefact-free EEG recording during psychometric tests) which was developed and used in this study represents a valid tool for future pharmacological research.
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Affiliation(s)
- F Schober
- Pro Science Private Research Institute GmbH, Linden
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32
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Abstract
Approximately one-third of schizophrenic patients receiving antipsychotic drugs obtain little or no benefit from them. In some reports, response has been linked with "prognostic" factors, including abnormal EEG and drug response (pharmaco-EEG). Measurements of topological EEG spectral power and Brief Psychiatric Rating Scale (BPRS) values were obtained in 15 schizophrenics over a period of 20 min immediately after the first application, and at weekly intervals after single intramuscular injection of 2 ml depot haloperidol (Haldol-Decanoate). A highly significant increase in the alpha-1 power density at almost all positions and an increase in theta power at parietotemporal regions can be described as electrophysiological parameters of the acute pharmaco-EEG. BPRS values decreased continuously within the first 2 weeks followed by an increase to the predrug level after the fourth week. Over the whole observation period there was a correlation between neurophysiological data (alpha-1 power) and clinical symptomatology (BPRS total score; r = -0.7). Therefore, it can be concluded that quantitative EEG recordings are able to serve as a tool for the optimization of the depot neuroleptic treatment in schizophrenics.
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Affiliation(s)
- R Schellenberg
- Pro Science Private Research Institute GmbH, Linden, Germany
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33
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Salari H, Bramley A, Langlands J, Howard S, Chan-Yeung M, Chan H, Schellenberg R. Effect of phospholipase C inhibitor U-73122 on antigen-induced airway smooth muscle contraction in guinea pigs. Am J Respir Cell Mol Biol 1993; 9:405-10. [PMID: 8398179 DOI: 10.1165/ajrcmb/9.4.405] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The importance of phospholipase C (PLC) in airway smooth muscle contraction was studied, using an inhibitor of PLC, 1-[6-[[17 beta-3-methoxyestra-1,3,5(10)-trien-17-yl] amino]hexyl]-1H-pyrrole-2,5-dione (U-73122). Tracheas from ovalbumin (OA)-sensitized guinea pigs contracted rapidly after exposure to low concentrations of antigen (OA). However, tracheas treated with U-73122 for 10 min prior to the addition of antigen, demonstrated a 3 log rightward shift in the OA dose-response curve with an IC50 of 7 microM. The analogue of U-73122, 1-[6[[17 beta-3-methoxyestra-1,3,5 trien-17-yl]amino]hexyl]-2,5-pyrrolidine-dione (U-73433), was approximately 5-fold less active in inhibiting smooth muscle contraction. In addition to the inhibition of antigen-induced smooth muscle contraction, U-73122 inhibited carbachol- and leukotriene D4-induced smooth muscle contraction. Furthermore, U-73122 inhibited in a dose-dependent manner antigen-induced histamine release from guinea pig tracheal tissue. The inhibition of smooth muscle contraction by U-73122 correlated well with the inhibition of polyphosphoinositide mediates smooth muscle contractile responses to muscarinic agonists and leukotrienes as well as antigenic-induced contraction.
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Affiliation(s)
- H Salari
- Department of Medicine, University of British Columbia, Vancouver, Canada
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34
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Abstract
1. Schizophrenic patients have been investigated electroencephalographically to describe disturbed information processing mechanisms. 2. 16-channel quantitative EEG and P300 were recorded at resting conditions before and during neuroleptic depot injection. 3. Reduced occipital alpha-power and alpha-power dependent P300-amplitudes were found in the schizophrenics. 4. Hippocampal structures are involved in the disturbed information processing mechanisms.
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Affiliation(s)
- R Schellenberg
- Department of Pathophysiology, Medical Academy of Magdeburg, Germany
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35
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Miyata M, Schuster B, Schellenberg R. Sulfite-containing Canadian pharmaceutical products available in 1991. CMAJ 1992; 147:1333-8. [PMID: 1483237 PMCID: PMC1336441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE To compile an inclusive list of Canadian pharmaceutical products available in 1991 that contained sulfites. DATA SOURCES Written and oral responses from 94 pharmaceutical companies selected from the 1989 Compendium of Pharmaceuticals and Specialties. RESULTS A list of sulfite-containing pharmaceutical products was compiled from data supplied by the 90 responding companies. Companies whose products contained no sulfites were separately identified. CONCLUSIONS Sulfites are present in many pharmaceutical products and are one of many excipients and additives that have been reported to cause severe adverse reactions. The provided list should be a useful aid for health care practitioners when prescribing pharmaceutical products for sulfite-sensitive patients.
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Affiliation(s)
- M Miyata
- Department of Pharmacy, St. Paul's Hospital, Vancouver, BC
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36
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Abstract
In this study EEG-spectral parameters like mean alpha-power values and center frequency values are computed as maps and compared using significant probability mapping. The parameters are used to describe changes of the functional state of the brain after neuroleptic depot injection (Haldol-Decanoate) in schizophrenic patients. The absolute alpha-power increased significantly (p < 0.01), especially within the first week after injection mostly in the left hemispheric regions. The center frequency decreased most significantly (p < 0.02) between the first and second week after haldol depot injection at the right occipital regions. Both parameters are efficient to describe functional changes correlated with clinical symptomatology, even 3-5 days earlier. Thus, EEG power and center frequency mapping can be used very efficiently to estimate the optimal time between sequential neuroleptic depot injections.
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Affiliation(s)
- R Schellenberg
- Department of Pathophysiology, Medical Academy of Magdeburg, FRG
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37
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Boulay J, Schellenberg R, Brady PG. Role of ERCP and therapeutic biliary endoscopy in association with laparoscopic cholecystectomy. Am J Gastroenterol 1992; 87:837-42. [PMID: 1535478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Laparoscopic removal is rapidly becoming the preferred method of cholecystectomy; however, choledocholithiasis cannot usually be managed with a laparoscopic approach. Combined endoscopic sphincterotomy and laparoscopic cholecystectomy is a potential solution to this problem. To determine the feasibility of this combined procedure we studied 41 patients who had both endoscopic retrograde cholangiopancreatography (ERCP) and laparoscopic cholecystectomy. Indications for ERCP included jaundice, gallstone pancreatitis, dilated ducts on sonography, elevated liver enzymes, or stones seen on operative cholangiography. Twenty-eight patients had ERCP preoperatively. Nine patients had common duct stones; these were successfully removed from eight patients after sphincterotomy. Two patients had unexpected strictures requiring a change in surgical approach. Thirteen patients had ERCP postoperatively. Eight of those patients had common duct stones, and all were successfully removed following endoscopic sphincterotomy. Three patients had postoperative strictures, one of which was treated by endoscopic stent placement. No complications as a result of ERCP or sphincterotomy were encountered. ERCP and endoscopic sphincterotomy can be safely performed both preoperatively and as early as 1 day postoperatively. If indicators of choledocholithiasis are present, preoperative ERCP is preferred, because stone removal occasionally is unsuccessful, and cholangiographic findings may change the operative approach. Postoperative ERCP can define and, in some instances, treat biliary tract injuries resulting from laparoscopic cholecystectomy.
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Affiliation(s)
- J Boulay
- Department of Medicine, University of South Florida, College of Medicine, Tampa
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38
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Siewert B, Schellenberg R, Knorr W, Kropf S, Beyer H, Schindler M, Schwarz A. [Left hemispheric site of EEG findings in patients with schizophrenic psychoses]. Fortschr Neurol Psychiatr 1990; 58:455-9. [PMID: 2086430 DOI: 10.1055/s-2007-1001209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
It was the aim of our study to examine the interhemispherical and extrahemispherical integration that is possibly disturbed in patients suffering from schizophrenic psychoses, using an easy method of EEG performance spectral analysis. For this purpose, the EEG at rest and the functional EEG were determined in 69 schizophrenic patients (ICD) and 22 healthy subjects and the EEG reactivity was calculated. Differences especially in alpha-2 reactivity were seen both intrahemispherically and interhemispherically. This supports the concept of left hemispheric dysfunction in patients suffering from schizophrenic psychoses.
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Affiliation(s)
- B Siewert
- Medizinische Akademie Magdeburg, Arbeitsbereich Pathophysiologie des Institutes für Pathologische Biochemie
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39
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40
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Schellenberg R, Schwarz A, Knorr W, Schindler M. [EEG performance spectral mapping during drug therapy in a patient with schizophrenic psychosis]. Psychiatr Neurol Med Psychol (Leipz) 1990; 42:618-24. [PMID: 1981811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In a paranoid-hallucinatoric patient with chronic course and acute exacerbation a EEG mapping study during neuroleptic treatment was carried out. The typical changes of the alpha power spectra in schizophrenic psychoses as well the normalization after neuroleptic treatment could be found in the alpha map. The changes were in correlation to the clinical state.
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Affiliation(s)
- R Schellenberg
- Institut für Pathologische Biochemie, Medizinische Akademie Magdeburg,Arbeitsbereich Pathophysiologie
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41
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Abstract
The P300 waveform has been associated with cognitive activity during information processing, and the hippocampus has been discussed as a possible generator of this waveform. This being the case some would argue that it should be possible to record the P300 with a shorter latency and greater amplitude from an electrode placed as near the hippocampus as possible. Under local anaesthesia we inserted a specially constructed needle electrode through the left nostril in the recessus pharyngeus close to the hippocampus. The results did not support the hippocampal hypothesis. Nasopharyngeally recorded P300's were found to have significantly decreased amplitudes and extended latencies when compared to vertex recordings.
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Affiliation(s)
- R Schellenberg
- Department of Pathophysiology, Medical Academy of Magdeburg, G.D.R
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42
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Schellenberg R, Knorr W, Beyer H, Kropf S, Schindler M, Bölsche F, Belicke B, Kondratjuk G. Multivariate EEG power spectral analysis in acute schizophrenics. Int J Psychophysiol 1989; 8:85-91. [PMID: 2584086 DOI: 10.1016/0167-8760(89)90022-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The electroencephalogram (EEG) during information processing is influenced by specific changes in brain electrical activity. Based on the theory of disturbed information processing in schizophrenics, we analysed auditory stimulus induced EEG changes by Fast Fourier Transformation. The most important of the significant stimulation-dependent EEG power changes were measured in the 0.5-3.5 Hz and 10-13.5 Hz frequency bands in the left frontoparietal lead. In a multivariate analysis the separation of the subjects examined into acute schizophrenics and normals was incorrect in only 21% of the cases (resubstitution rate); using pi-method an error of 31% was estimated.
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Affiliation(s)
- R Schellenberg
- Department of Pathophysiology, Medical Academy of Magdeburg, G.D.R
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43
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Schellenberg R, Christoph B, Kluba J, Knorr W, Siewert B, Schindler M, Linsel A. Nasopharyngeal EEG recording in schizophrenic patients a preliminary remark. Int J Psychophysiol 1989. [DOI: 10.1016/0167-8760(89)90315-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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44
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Gruzelier J, Liddiard D, Dennis P, Schellenberg R. Validation of EEG topographical mapping with neuropsychological functional activation. Int J Psychophysiol 1989. [DOI: 10.1016/0167-8760(89)90165-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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45
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Schellenberg R, Zwiener U, Kühne GE. [Pathophysiologic aspects of schizophrenic psychoses--a review]. Psychiatr Neurol Med Psychol (Leipz) 1989; 41:193-9. [PMID: 2662232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The aim of research in the field of "Biological Psychiatry" is the phenomenological description of several aspects of psychiatric diseases and the exploration of their pathological mechanisms. The most used methods are biochemical, morphological, genetical, social psychiatric, neuro- and psychophysiological ones. From the pathophysiological view the most discussed hypothesis is that of a disturbed central information processing. In this paper a short introduction should be given on psychosocial influence on the development of psychotic symptomatology and on the periphere vegetative and electroencephalographic parameters in psychiatric patients.
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Affiliation(s)
- R Schellenberg
- Institutes für Pathologische Biochemie, Medizinischen Akademie Magdeburg
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46
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Schellenberg R, Knorr W, Beyer H, Kropf S, Schindler M, Bölsche F, Kondratjuk G. Repeated acoustic stimulation of acute schizophrenic patients and the habituation of EEG power changes. Int J Psychophysiol 1989; 7:55-63. [PMID: 2925465 DOI: 10.1016/0167-8760(89)90031-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Habituation in psychiatric patients to repeated stimuli has typically been described in connection with the measurement of the skin conductance orienting response. Here EEG power spectra of acute schizophrenic patients and normals to 4 trials of an acoustic stimulation were examined for evidence of habituation. In response to stimulation the alpha EEG reactivity was less distinct in schizophrenics than in normals. This is in agreement with the theory of hypovariability or hyperstability of the EEG in schizophrenics. Signs of habituation in acute schizophrenics were clearer in fast beta frequencies of the parietal leads.
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Affiliation(s)
- R Schellenberg
- Department of Pathophysiology, Medical Academy of Magdeburg, G.D.R
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47
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Schellenberg R, Knorr W, Beyer H, Kropf S, Schindler M, Bölsche F. [Multivariate discriminant analysis of EEG power spectra in acute schizophrenic patients and healthy probands]. Psychiatr Neurol Med Psychol (Leipz) 1988; 40:555-63. [PMID: 3237884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The electroencephalogram (EEG) during information processing is influenced by specific changes in brain electrical activity. Based on the theory of a disturbed information processing in schizophrenics we analysed auditory stimulus induced EEG changes by Fast Fourier Transformation. The most important of the significant stimulation dependent EEG power changes were measured in the 0.5-3.5 Hz and 10-13.5 Hz frequency bands in the left parietal lead. In a multivariate analysis the separation of the subjects examined into acute schizophrenics and normals was incorrect in only 21% of the cases (resubstitution rate): using the pi-method an error of 31% was estimated.
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Affiliation(s)
- R Schellenberg
- Instituts für Pathologische Biochemie Medizinischen Akademie Magdeburg
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48
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Schuart J, Blume M, Schellenberg R. [Studies on the extraction of biologically active vasopressin from plasma (author's transl)]. Pharmazie 1981; 36:353-5. [PMID: 7267684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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49
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Schellenberg R. Sicherheitstechnische Bauteilbegutachtung. VonK . H . Ringelstein,S. Dittmar,P. M??ller,P. Hofst�tter,B. Goritzke,H . Kerkhoff undD. Schlegel. Verlag T�V Rheinland GmbH, K�ln 1975. 1. Aufl., 122 S., zahlr. Abb. u. Tab., kart. DM 27,-. CHEM-ING-TECH 1976. [DOI: 10.1002/cite.330480521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Schellenberg R, Mielenz H. [Local treatment of bacterial infections in surgical ambulatory practice using Fucidine-gel]. Z Allgemeinmed 1975; 51:1608-9. [PMID: 1210369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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