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Martí-Garrido J, Corominas M, Castillo-Fernández M, Belmonte J, Pineda F, Lleonart R. Allergy to Ailanthus altissima Pollen: A Local Allergen to Consider. J Investig Allergol Clin Immunol 2021; 30:452-454. [PMID: 32376523 DOI: 10.18176/jiaci.0577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- J Martí-Garrido
- Allergology Service, Hospital Universitari de Bellvitge-IDIBELL L'Hospitalet de Llobregat, Barcelona, Spain
| | - M Corominas
- Allergology Service, Hospital Universitari de Bellvitge-IDIBELL L'Hospitalet de Llobregat, Barcelona, Spain
| | | | - J Belmonte
- Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain.,Department of Animal Biology, Plant Biology and Ecology, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
| | - F Pineda
- DIATER Laboratories, Madrid, Spain
| | - R Lleonart
- Allergology Service, Hospital Universitari de Bellvitge-IDIBELL L'Hospitalet de Llobregat, Barcelona, Spain
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Valero S, Bosch R, Corominas M, Barrau V, Ramos-Quiroga JA, Casas M. Remittance or persistence of attention deficit-hyperactivity disorder (ADHD) and its impact on recidivism in risky driving behaviors. Traffic Inj Prev 2018; 19:701-707. [PMID: 30485128 DOI: 10.1080/15389588.2018.1505043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/22/2018] [Accepted: 07/22/2018] [Indexed: 06/09/2023]
Abstract
OBJECTIVE Recent data regarding the persistence or remittance of attention deficit-hyperactivity disorder (ADHD) diagnosis into adulthood raise the question of its possible role in crucial public health issues, including road safety, especially when neurocognitive capacities are challenged. METHODS The study included 611 participants with serious traffic violations. The Spanish version of the Mini International Neuropsychiatric Interview (M.I.N.I.) was used to assess psychopathology. They were grouped into 3 diagnostic conditions: non-ADHD, persistent ADHD (ADHD-P), and remittent ADHD (ADHD-R). Several risky driving behaviors were analyzed. RESULTS Although participants with ADHD have more driving violations relative to non-ADHD, ADHD-R, and ADHD-P drivers have similar profiles. ADHD-R and ADHD-P drivers are more prone to perform risky and recidivistic behaviors relative to non-ADHD counterparts (P = .044 and P = .047, respectively); ADHD-R and ADHD-P participants are statistically comparable in this proneness (P = .772). CONCLUSION These results suggest that the underlying core deficits of ADHD-attention and other executive disabilities-persist despite the fact that some people no longer reach the threshold for clinical diagnosis.
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Affiliation(s)
- S Valero
- a Group of Psychiatry, Mental Health and Addiction , Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
- b Department of Psychiatry , Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
- c Biomedical Network Research Center on Mental Health (CIBERSAM) , Madrid , Spain
- d Instituto para el Desarrollo de Estudios y Terapias Avanzadas en Neurociencias (IDETAN)
| | - R Bosch
- b Department of Psychiatry , Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
- d Instituto para el Desarrollo de Estudios y Terapias Avanzadas en Neurociencias (IDETAN)
- e Department of Psychiatry and Legal Medicine , Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
| | - M Corominas
- a Group of Psychiatry, Mental Health and Addiction , Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
- b Department of Psychiatry , Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
- c Biomedical Network Research Center on Mental Health (CIBERSAM) , Madrid , Spain
- d Instituto para el Desarrollo de Estudios y Terapias Avanzadas en Neurociencias (IDETAN)
| | - V Barrau
- b Department of Psychiatry , Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
| | - J A Ramos-Quiroga
- b Department of Psychiatry , Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
- c Biomedical Network Research Center on Mental Health (CIBERSAM) , Madrid , Spain
- e Department of Psychiatry and Legal Medicine , Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
| | - M Casas
- b Department of Psychiatry , Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
- c Biomedical Network Research Center on Mental Health (CIBERSAM) , Madrid , Spain
- d Instituto para el Desarrollo de Estudios y Terapias Avanzadas en Neurociencias (IDETAN)
- e Department of Psychiatry and Legal Medicine , Universitat Autònoma de Barcelona , Barcelona , Catalonia , Spain
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Laguna JJ, Archilla J, Doña I, Corominas M, Gastaminza G, Mayorga C, Berjes-Gimeno P, Tornero P, Martin S, Planas A, Moreno E, Torres MJ. Practical Guidelines for Perioperative Hypersensitivity Reactions. J Investig Allergol Clin Immunol 2018; 28:216-232. [DOI: 10.18176/jiaci.0236] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Valero S, Bosch R, Corominas M, Giannoni A, Barrau V, Ramos-Quiroga JA, Casas M. Psychopathology and traffic violations in subjects who have lost their driving license. Compr Psychiatry 2017; 76:45-55. [PMID: 28411408 DOI: 10.1016/j.comppsych.2017.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 03/05/2017] [Accepted: 03/24/2017] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The persistence of risky behaviors while driving and traffic accidents despite campaigns to increase awareness suggest that there may be underlying causes that maintain proneness to traffic violations. The aim of the current study was to assess: a) the prevalence of psychopathology in a sample of people who have lost their driving license due to former traffic violations and b) the discriminatory capacity of each psychopathological disorder to differentiate among people with high and low proneness to perform risky behaviors while driving. METHODS 383 participants in a course to recover their driving license after its loss due to previous traffic violations were included. The International Neuropsychiatric Interview (M.I.N.I.) according to DSM-IV was used to assess psychopathology. RESULTS Between 67% and 76.2% of the participants had been affected by a lifetime psychopathological disorder until the moment of assessment. The most prevalent diagnoses were substance abuse including alcohol (52.5-62.7%), ADHD (19.7-28.5%), depression (7.9-14.4%) and anxiety (3.6-12.4%). Substance abuse and ADHD also showed the strongest set of associations with specific risk behaviors, but ADHD emerged as the most discriminant disorder to distinguish between those people at high and low risk of while driving. CONCLUSIONS The results of the current study suggest that addressing psychopathology explicitly to prevent risky behaviors and recidivism while driving would provide benefits in this area.
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Affiliation(s)
- S Valero
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain; Biomedical Network Research Center on Mental Health (CIBERSAM), Madrid, Spain.
| | - R Bosch
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain; Biomedical Network Research Center on Mental Health (CIBERSAM), Madrid, Spain
| | - M Corominas
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain; Biomedical Network Research Center on Mental Health (CIBERSAM), Madrid, Spain
| | - A Giannoni
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - V Barrau
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - J A Ramos-Quiroga
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain; Biomedical Network Research Center on Mental Health (CIBERSAM), Madrid, Spain; Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
| | - M Casas
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain; Biomedical Network Research Center on Mental Health (CIBERSAM), Madrid, Spain; Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Catalonia, Spain
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Gastaminza G, Ruiz-Canela M, Baiardini I, Andrés-López B, Corominas M. Psychometric Validation of the Spanish Version of the DHRQoL Questionnaire. J Investig Allergol Clin Immunol 2016; 26:322-323. [DOI: 10.18176/jiaci.0079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Pagerols M, Richarte V, Sánchez-Mora C, Garcia-Martínez I, Corrales M, Corominas M, Cormand B, Casas M, Ribasés M, Ramos-Quiroga JA. Pharmacogenetics of methylphenidate response and tolerability in attention-deficit/hyperactivity disorder. Pharmacogenomics J 2016; 17:98-104. [DOI: 10.1038/tpj.2015.89] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 09/15/2015] [Accepted: 11/02/2015] [Indexed: 01/06/2023]
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Corominas M, Palomar G, Ramos J, Casas M. EPA-1236 – Evaluation of stress response in adults with ADHD. Eur Psychiatry 2014. [DOI: 10.1016/s0924-9338(14)78478-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Corominas M, Gastaminza G, Lobera T. Hypersensitivity reactions to biological drugs. J Investig Allergol Clin Immunol 2014; 24:212-225. [PMID: 25219103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
Strictly speaking, biological drugs are defined as drugs obtained using biotechnology that act on the immune system. They encompass monoclonal antibodies, fusion proteins, and cytokines. Although they are restricted to specific diseases, they have been increasingly used in recent years, with the consequent reporting of adverse reactions, many of which occur during the postmarketing phase. Because of the characteristics of adverse reactions, a new classification has been proposed. Hypersensitivity reactions are beta-type reactions and include infusion reactions and injection site reactions. In some cases, an immune mechanism mediated by IgE, IgG, or T cells is involved. Clinical symptoms vary widely, from skin reactions to anaphylaxis. Diagnostic studies are based on skin tests and in vitro tests (specific IgE, basophil activation test). Most are not standardized and are conducted in small groups of patients, thus making it impossible to obtain sensitivity and specificity values. With some biological drugs, desensitization protocols have proven successful. In this review, we discuss hypersensitivity reactions to biological drugs and the diagnostic tests used to assess these reactions.
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Gastaminza G, Herdman M, Baiardini I, Braido F, Corominas M. Cross-cultural adaptation and linguistic validation of the Spanish version of the drug hypersensitivity quality of life questionnaire. J Investig Allergol Clin Immunol 2013; 23:508-510. [PMID: 24654317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
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Palomar G, Paris J, Corominas M, Ramos-Quiroga J, Ferrer R, Catalan R, Real A, Ramirez C, Casas M. 1092 – Cortisol awakening response (CAR) and gender differences in adults with attention deficit hyperactivity disorder (ADHD). Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76200-x] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Corominas M, Ramos-Quiroga JA, Ferrer M, Sáez-Francàs N, Palomar G, Bosch R, Casas M. Cortisol responses in children and adults with attention deficit hyperactivity disorder (ADHD): a possible marker of inhibition deficits. ACTA ACUST UNITED AC 2012; 4:63-75. [PMID: 22576746 DOI: 10.1007/s12402-012-0075-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 04/24/2012] [Indexed: 11/28/2022]
Abstract
Attention deficit hyperactivity disorder (ADHD) is a heterogeneous disease whose neurobiological background is not completely understood. It has been proposed that deficits of the inhibitory function with an underactive behavioral inhibition system (BIS) may be in the core of ADHD. In this regard, this review summarizes all studies that examine the involvement of cortisol in ADHD. Differences in cortisol responses from different ADHD subtypes, hyperactive/impulsive, inattentive, and combined, are analyzed. In addition, we examine the role of comorbidities as confounding factors in the study of cortisol in ADHD, including comorbid disruptive behavioral disorder (DBD), as well as anxiety and depressive disorders. Because ADHD is a neurodevelopmental condition and approximately half of the children enter adulthood with the disorder, we review cortisol studies in adults and children separately. Two diverse patterns of cortisol have been reported both in children and adults with ADHD. Blunted cortisol responses to stress are associated with comorbid DBD, whereas high cortisol responses are associated to comorbid anxiety disorders. Nevertheless, the inhibitory deficits in ADHD do not appear to be related directly to cortisol deficits in either children or adults. This review increases our understanding of the heterogeneity of ADHD and could help in determining new strategies for the treatment of these patients. Future studies including gender and a more systematic methodology to study the cortisol response are needed.
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Affiliation(s)
- M Corominas
- Department of Psychiatry, Hospital Universitari Vall d'Hebron (UAB), Escola d'Infermeria building 5th floor, Pg. Vall d'Hebron, 119-129, 08035 Barcelona, Catalonia, Spain.
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Corominas M, Lleonart R, Muñoz E. Bronchospasm induced selectively by paracetamol. J Investig Allergol Clin Immunol 2012; 22:70-71. [PMID: 22448460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Affiliation(s)
- M Corominas
- Allergy Unit, Hospital Universitari de Bellvitge, IDIBELL, L'Hospitalet de Llobregat, Spain.
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Roncero C, López-Ortíz C, Rodríguez-Pascual M, Corominas M, Castells X, Grau-López L, Daigre C, Gómez-Baeza S, Castillo E, Valero S, Casas M. PW01-243 - The apomorphine test as a biological marker for relapse in cocaine dependent-patients. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)71650-3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Corominas M, Lleonart R, Bonete J, Mestre M. Role of Tropomyosin in D pteronyssinus Allergic Patients. J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.873] [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: 10/21/2022]
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Corominas M, Roncero C, Ribases M, Castells X, Casas M. Brain-derived neurotrophic factor and its intracellular signaling pathways in cocaine addiction. Neuropsychobiology 2007; 55:2-13. [PMID: 17556847 DOI: 10.1159/000103570] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [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] [Received: 05/29/2006] [Accepted: 12/17/2006] [Indexed: 12/19/2022]
Abstract
Cocaine addiction is one of the severest health problems faced by western countries, where there is an increasing prevalence of lifelong abuse. The most challenging aspects in the treatment of cocaine addiction are craving and relapse, especially in view of the fact that, at present, there is a lack of effective pharmacological treatment for the disorder. What is required are new pharmacological approaches based on our current understanding of the neurobiological bases of drug addiction. Within the context of the behavioral and neurochemical actions of cocaine, this paper considers the contribution of brain-derived neurotrophic factor (BDNF) and its main intracellular signaling mechanisms, including mitogen-activated protein kinase/extracellular signal-regulated protein kinase (MAPK/ERK) and phosphatidylinositol 3-kinase (PI3K), in psychostimulant addiction. Repeated cocaine administration leads to an increase in BDNF levels and enhanced activity in the intracellular pathways (PI3K and MAPK/ERK) in the reward-related brain areas, which applies especially several days following withdrawal. It has been hypothesized that these neurochemical changes contribute to the enduring synaptic plasticity that underlies sensitized responses to psychostimulants and drug-conditioned memories leading to compulsive drug use and frequent relapse after withdrawal. Nevertheless, increased BDNF levels could also have a role as a protection factor in addiction. The inhibition of the intracellular pathways, ERK and PI3K, leads to a disruption in sensitized responses and conditioned memories associated with cocaine addiction and suggests new, potential therapeutic strategies to explore in the dependence on psychostimulants.
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Affiliation(s)
- M Corominas
- Psychiatry Service, Vall d'Hebron Hospital, Psychiatry Department of the Universitat Autònoma de Barcelona, Barcelona, Spain.
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Lleonart R, Corominas M. Occupational Latex Allergy in Non-Health Care Workers with Rubber Glove Exposure. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.296] [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: 10/23/2022]
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Affiliation(s)
- R Lleonart
- Allergy Unit, Hospital Universitari Bellvitge Feixa Llarga sn l'Hospitalet, Barcelona, Spain.
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Corominas M, Lleonart R. Predictors of Clinical Food Allergy in Patients with Pollen Rhinitis. J Allergy Clin Immunol 2006. [DOI: 10.1016/j.jaci.2005.12.130] [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: 10/24/2022]
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Corominas M, Cardona V, Gonzalez L, Caylà JA, Rufi G, Mestre M, Buendia E. B-lymphocytes and co-stimulatory molecules in Mycobacterium tuberculosis infection. Int J Tuberc Lung Dis 2004; 8:98-105. [PMID: 14974752] [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: 04/29/2023] Open
Abstract
SETTING The immunological mechanisms that lead to the control of Mycobacterium tuberculosis infection are not well known. OBJECTIVE To study the role of lymphocyte subsets and co-stimulatory molecules in M. tuberculosis infection. DESIGN In 35 patients with pulmonary tuberculosis (PTB) and their contacts, 29 persons with tuberculin skin test conversion (TSTC) and 20 healthy individuals with negative tuberculin skin test (NTST), we studied T-lymphocyte subsets (CD3, CD4, CD8, alphabetaTCR and gammadeltaTCR), B-cells, monocytes and co-stimulatory molecules CD28 and CD86 in peripheral blood. The results were analysed at univariate and multivariate level through discriminant analysis. RESULTS At univariate level, compared with TSTC and NTST, PTB patients presented a decrease in CD4+ T-cells (P = 0.002), and B-cells (P = 0.02 and 0.001, respectively). With regard to NTST subjects, PTB patients also showed a decrease in the percentage of CD86+ monocytes (P = 0.02) and an increase in the percentage of CD86+ B-lymphocytes (P = 0.02). At multivariate level, CD4+ T-lymphocytes showed statistical differences between PTB and TSTC subjects (P = 0.001). B-lymphocytes were discriminant between PTB and NTST (P < 0.001) and between TSTC and NTST individuals (P = 0.01). CONCLUSION The number of total CD4+ T-cells is the best discriminant parameter for distinguishing between disease and infection, whereas the B-cell count is the best between healthy and infected individuals.
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Affiliation(s)
- M Corominas
- Department of Immunology-Allergy, Ciutat Sanitària i Universitària de Bellvitge, L'Hospitalet de Llobregat, Catalonia, Spain.
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Affiliation(s)
- P García-Ortega
- Allergy Unit, Hospital Universitari de Bellvitge, Avda Gran Via km 2,7, 08907 L'Hospitalet de Llobregat, Spain.
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Morey M, Serras F, Baguñà J, Hafen E, Corominas M. Modulation of the Ras/MAPK signalling pathway by the redox function of selenoproteins in Drosophila melanogaster. Dev Biol 2001; 238:145-56. [PMID: 11784000 DOI: 10.1006/dbio.2001.0389] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [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: 11/22/2022]
Abstract
Modulation of reactive oxygen species (ROS) plays a key role in signal transduction pathways. Selenoproteins act controlling the redox balance of the cell. We have studied how the alteration of the redox balance caused by patufet (selD(ptuf)), a null mutation in the Drosophila melanogaster selenophosphate synthetase 1 (sps1) gene, which codes for the SelD enzyme of the selenoprotein biosynthesis, affects the Ras/MAPK signalling pathway. The selD(ptuf) mutation dominantly suppresses the phenotypes in the eye and the wing caused by hyperactivation of the Ras/MAPK cassette and the activated forms of the Drosophila EGF receptor (DER) and Sevenless (Sev) receptor tyrosine kinases (RTKs), which signal in the eye and wing, respectively. No dominant interaction is observed with sensitized conditions in the Wnt, Notch, Insulin-Pi3K, and DPP signalling pathways. Our current hypothesis is that selenoproteins selectively modulate the Ras/MAPK signalling pathway through their antioxidant function. This is further supported by the fact that a selenoprotein-independent increase in ROS caused by the catalase amorphic Cat(n1) allele also reduces Ras/MAPK signalling. Here, we present the first evidence for the role of intracellular redox environment in signalling pathways in Drosophila as a whole organism.
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Affiliation(s)
- M Morey
- Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, Diagonal 645, Barcelona, 08028, Spain
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Castellano S, Morozova N, Morey M, Berry MJ, Serras F, Corominas M, Guigó R. In silico identification of novel selenoproteins in the Drosophila melanogaster genome. EMBO Rep 2001; 2:697-702. [PMID: 11493597 PMCID: PMC1083988 DOI: 10.1093/embo-reports/kve151] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.3] [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: 11/12/2022] Open
Abstract
In selenoproteins, incorporation of the amino acid selenocysteine is specified by the UGA codon, usually a stop signal. The alternative decoding of UGA is conferred by an mRNA structure, the SECIS element, located in the 3'-untranslated region of the selenoprotein mRNA. Because of the non-standard use of the UGA codon, current computational gene prediction methods are unable to identify selenoproteins in the sequence of the eukaryotic genomes. Here we describe a method to predict selenoproteins in genomic sequences, which relies on the prediction of SECIS elements in coordination with the prediction of genes in which the strong codon bias characteristic of protein coding regions extends beyond a TGA codon interrupting the open reading frame. We applied the method to the Drosophila melanogaster genome, and predicted four potential selenoprotein genes. One of them belongs to a known family of selenoproteins, and we have tested experimentally two other predictions with positive results. Finally, we have characterized the expression pattern of these two novel selenoprotein genes.
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Affiliation(s)
- S Castellano
- Grup de Recerca en Informàtica Biomèdica, Institut Municipal d'Investigació Mèdica, Universitat Pompeu Fabra, Dr. Aiguader 80, 08003 Barcelona, Spain
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Abstract
To study the function of selenoproteins in development and growth we have used a lethal mutation (selD(ptuf)) of the Drosophila homologous selenophosphate synthetase (selD) gene. This enzyme is involved in the selenoprotein biosynthesis. The selD(ptuf) loss-of-function mutation causes aberrant cell proliferation and differentiation patterns in the brain and imaginal discs, as deduced from genetic mosaics, patterns of gene expression and analysis of cell cycle markers. In addition to that, selenium metabolism is also necessary for the ras/MAPKinase signal tansduction pathway. Therefore, the use of Drosophila imaginal discs and brain and in particular the selD(ptuf) mutation, provide an excellent model to investigate the role of selenoproteins in the regulation of cell proliferation, growth and differentiation.
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Affiliation(s)
- F Serras
- Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, 08028 Barcelona, Spain.
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Thomson TM, Lozano JJ, Loukili N, Carrió R, Serras F, Cormand B, Valeri M, Díaz VM, Abril J, Burset M, Merino J, Macaya A, Corominas M, Guigó R. Fusion of the human gene for the polyubiquitination coeffector UEV1 with Kua, a newly identified gene. Genome Res 2000; 10:1743-56. [PMID: 11076860 PMCID: PMC310942 DOI: 10.1101/gr.gr-1405r] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.3] [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: 11/24/2022]
Abstract
UEV proteins are enzymatically inactive variants of the E2 ubiquitin-conjugating enzymes that regulate noncanonical elongation of ubiquitin chains. In Saccharomyces cerevisiae, UEV is part of the RAD6-mediated error-free DNA repair pathway. In mammalian cells, UEV proteins can modulate c-FOS transcription and the G2-M transition of the cell cycle. Here we show that the UEV genes from phylogenetically distant organisms present a remarkable conservation in their exon-intron structure. We also show that the human UEV1 gene is fused with the previously unknown gene Kua. In Caenorhabditis elegans and Drosophila melanogaster, Kua and UEV are in separated loci, and are expressed as independent transcripts and proteins. In humans, Kua and UEV1 are adjacent genes, expressed either as separate transcripts encoding independent Kua and UEV1 proteins, or as a hybrid Kua-UEV transcript, encoding a two-domain protein. Kua proteins represent a novel class of conserved proteins with juxtamembrane histidine-rich motifs. Experiments with epitope-tagged proteins show that UEV1A is a nuclear protein, whereas both Kua and Kua-UEV localize to cytoplasmic structures, indicating that the Kua domain determines the cytoplasmic localization of Kua-UEV. Therefore, the addition of a Kua domain to UEV in the fused Kua-UEV protein confers new biological properties to this regulator of variant polyubiquitination.
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Affiliation(s)
- T M Thomson
- Institut de Biologia Molecular, Consejo Superior de Investigaciones Cientificas, Barcelona, Spain.
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Abstract
A novel gene glaikit (gkt) has been identified which is expressed in the delaminating neuroblasts of the D. melanogaster embryonic central nervous system. At the earliest stages of embryonic development the expression of glaikit was ubiquitous, but by the time the neuroblasts are delaminating gkt expression became restricted to neuroblasts and a few ganglion mother cells. The gkt gene has no characterized homologues and encodes no previously described protein motifs. There are, however, evolutionary conserved predicted genes present in S. pombe, S. cerevisiae and C. elegans. Ectopic neuroblasts induced in either Notch or Delta mutant backgrounds also showed expression of glaikit.
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Affiliation(s)
- J Dunlop
- Department de Genetica, Facultat de Biologia, Universitat de Barcelona, Diagonal 645, 08071, Barcelona, Spain
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27
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Abstract
BACKGROUND Some studies have reported an increase of atopy in HIV-infected (HIV+) patients, but the cause still remains unclear. OBJECTIVE To determine the prevalence of atopy in HIV+ patients and to investigate its predictors. METHODS Seventy-four HIV+ hospitalized patients (46 of them with AIDS) were studied prospectively for the presence of atopy, based on immediate hypersensitivity to common allergens by prick test. Serum immunoglobulins, specific IgE, lymphocyte subsets, and the expression of low affinity IgE receptor (CD23) on B cells were determined. RESULTS Thirty-one percent of patients presented IgE values greater than 150 ku/L (39% of patients without AIDS and 26% of AIDS patients; P = .23) and 47% showed an increase (> or = 2%) in the percentage of CD23+ B cells. Non-AIDS patients had higher IgE values than AIDS patients (346 +/- 605 versus 175 +/- 276; P = .16). Atopy prevalence was higher in non-AIDS than in AIDS patients (28% versus 11%; P = .06). Specific IgE agreed with positive prick test in 58% of cases. Multivariate analysis showed that a personal history suggestive of allergic disease and IgE > 150 ku/L were predictors of atopy, while gender, risk group, CD4+ T cells, CD23 expression on B cells, and AIDS were not associated. CONCLUSIONS HIV+ patients present a higher prevalence of atopy in early stages of HIV infection than general population. Since allergic reactions could accelerate HIV-infection by increasing type 2 cytokines, it is important to evaluate the atopic state in HIV+ patients with IgE > 150 ku/L or with suggestive allergic history in order to prevent it.
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Affiliation(s)
- M Corominas
- Immunology Service, Ciutat Sanitària i Universitària de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain
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28
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Alsina B, Serras F, Baguñà J, Corominas M. Characterisation of a selenophosphate synthetase from a collection of P-lacW insertion mutants in Drosophila. Int J Dev Biol 2000; Suppl 1:85S. [PMID: 9087708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- B Alsina
- Departament de Genètica, Universitat de Barcelona, Spain
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29
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Alsina B, Corominas M, Berry MJ, Baguñà J, Serras F. Disruption of selenoprotein biosynthesis affects cell proliferation in the imaginal discs and brain of Drosophila melanogaster. J Cell Sci 1999; 112 ( Pt 17):2875-84. [PMID: 10444382 DOI: 10.1242/jcs.112.17.2875] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [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: 11/20/2022] Open
Abstract
The patufet gene encodes the Drosophila melanogaster homologue of selenophosphate synthetase, an enzyme required for selenoprotein synthesis, and appears to have a role in cell proliferation. In this paper we analyse the expression pattern of patufet during the development of imaginal discs and brain as well as the function of this gene in relation to cell proliferation. Wild-type organisms showed a highly dynamic pattern of ptuf mRNA expression during larval and pupal development. Co-localization analysis of ptuf mRNA expression and BrdU incorporation showed high levels of ptuf mRNA in dividing cells and low or undetectable levels in non-dividing cells. In addition, [(75)Se] incorporation revealed a major selenoprotein band of 42 kDa. Mutant organisms showed no selenoprotein synthesis, lower levels of cell proliferation, a higher proportion of cells arrested in G(2) as seen by cyclin B labeling and increased levels of reactive oxygen species (ROS). Because most selenoproteins identified so far are antioxidants, the role of ptuf in cell proliferation through the control of the cellular redox balance is discussed.
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Affiliation(s)
- B Alsina
- Departament de Genètica, Facultat de Biologia, Universitat de Barcelona, Diagonal 645, Spain
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30
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Abstract
HYPOTHESIS Rhinosinusitis is common during HIV infection; its prevalence is uncertain and could probably be related to clinical features, immunoallergological status, and diagnostic criteria METHODS Seventy-four patients hospitalized with HIV infection were prospectively evaluated for the presence of rhinosinusitis based on clinical findings, nasal endoscopy, or paranasal sinus computed tomography (CT). Immune status, nasal smear, features of atopy (based on the prick test), and its contribution to sinusal inflammatory pathology were also evaluated. RESULTS Most patients were severely immunosuppressed: CD4+ 155+/-201 cells/mL and 12+/-11% (mean +/- SD). Thirty-five percent of the patients presented at least two criteria of rhinosinusitis (clinical findings, nasal endoscopy, and CT: 35%; clinical findings and CT: 50%; nasal endoscopy and CT: 15%). CT scan showed multiple sinus involvement, opacification over 25% of the total volume of the maxillary sinus in 50% of patients, and opacification of the sphenoidal sinus in 40% of cases. Atopy was present in 18% of patients, a figure which reflects the expected prevalence in our geographic area. Two independent predictors were associated with a higher probability of rhinosinusitis: bilateral absence of maxillary infundibular patency (odds ratio, 7.5; 95% CI = 2.03-27.9) and low total count (odds ratio, 0.99; 95% CI = 0.99-1.00) or percentage of CD4+ (odds ratio, 0.93; 95% CI = 0.88-1.00). CONCLUSIONS There is a high prevalence of rhinosinusitis in HIV-infected individuals. This finding is related to a decreased cellular immunity, but it does not appear to be related to IgE-related immediate hypersensitivity. Nasal endoscopy should be the first-step diagnostic test. However, when clinical suspicion exists and endoscopy fails to explain symptoms, CT scan is a valuable adjunct to establish this diagnosis.
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Affiliation(s)
- J F García-Rodríguez
- Department of Otolaryngology, Ciutat Sanitària i Universitària de Bellvitge, University of Barcelona, Spain.
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31
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Corominas M. Mechanisms implicated in adverse reactions to non-steroidal anti-inflammatory drugs. Clin Exp Allergy 1998; 28 Suppl 4:41-5. [PMID: 9761030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- M Corominas
- Immunology Service, Hospital Duran i Reynals, Ciutat Sanitària i Universitària de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain
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32
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Bas J, Mestre M, Grinyó JM, Massip E, Alsina J, Castelao AM, Corominas M, Buendia E. Peripheral blood lymphoid subsets and long-term clinical course of kidney recipients: a longitudinal study. Cytometry 1998. [PMID: 9579608 DOI: 10.1002/(sici)1097-0320(19980415)34:2<103::aid-cyto7>3.0.co;2-j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A longitudinal study of peripheral blood lymphocyte subsets was performed in 23 renal allograft recipients treated with prophylactic antilymphocyte antibodies, CsA, and steroids. At day 0 samples were obtained before transplantation (Tx), and afterwards at months +1, +3, +6, +9, +12, +24, +36, and +48. In all patients, after the depletion of lymphoid subsets during antilymphocyte antibody treatment, CD8+ lymphocytes recovered and reached higher values than those observed prior to Tx. This was mainly due to an increase in CD8+CD45RA+ lymphocytes; in contrast, the levels of "memory" CD4+ T cells and the CD4+CD62L+ subset remained low during all the follow-up period. In patients with preserved graft function (n=14) (with creatinine levels below 200 micromol/mL), the initial, relative decrease in CD4+ T cells was never reversed and the recovery of CD8+ lymphocytes started early. They also presented a peak of HLA-DR antigen expression at 1 month, not observed in those patients displaying a suboptimal graft function. At 1 month, the patients with suboptimal graft function (n=9) (with creatinine levels above 200 micromol/mL) showed higher number of CD4+ T cells, delayed recovery of CD8+ lymphocytes, and higher percentage of activated lymphocytes from month +3 on than well-functioning kidney recipients. Both CD8+ lymphocytes and HLA-DR+ T cells, found at month + 1 post-Tx, were negatively correlated with the concentration of creatinine along the follow-up. Interestingly, the mean percentage of CD4+CD25+ T cells found 36 and 48 months after Tx were positively correlated with creatinine concentration at these times. These findings indicate that variations in the distribution of lymphocyte subsets are related with a long-term graft outcome. Within the first month after Tx, a rapid recovery of CD8+ lymphocytes, but not of CD4+ T cells, and a peak of HLA-DR expression, are associated with a good graft function. In contrast, long-term expression of activation markers is related with renal dysfunction.
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Affiliation(s)
- J Bas
- Immunology Services, Ciutat Sanitària Universitària de Bellvitge, Barcelona, Catalonia, Spain
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33
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Corominas M, Mestre M, Bas J, Buendia E. Distinct modulation by interferon-gamma (IFN-gamma) of CD23 expression on B and T lymphocytes of atopic subjects. Clin Exp Immunol 1998; 112:276-80. [PMID: 9649191 PMCID: PMC1904970 DOI: 10.1046/j.1365-2249.1998.00570.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The low-affinity IgE receptor (FcepsilonRII/CD23) plays a role in IgE production. Cytokines participating in IgE synthesis also modulate CD23 expression on lymphocytes, but whether this modulation is different in atopic subjects remains unclear. We studied CD23 expression on B and T lymphocytes in 10 asthmatic patients with Dermatophagoides pteronyssinus hypersensitivity and 10 healthy non-atopic subjects. Studies were performed by flow cytometry, in phytohaemagglutinin (PHA) or IL-4-stimulated mononuclear cell cultures, alone or in the presence of IFN-gamma. Soluble CD23 (sCD23) released in the culture supernatants was measured by enzyme-linked immunoassay. Both PHA and IL-4 induced the expression of CD23 on lymphocytes of atopic and non-atopic subjects. Whereas PHA increased both the percentage and mean fluorescence intensity of CD23+ B and T cells, IL-4 alone did not increase the percentage of CD23+ T cells. The effects of IFN-gamma were different in both groups, since it was able to reduce the percentage of PHA-stimulated CD23+ T cells only in non-atopic individuals. In non-atopic subjects more than atopic, levels of sCD23 were increased in the supernatants of PHA and IL-4 cultures. These results show that the modulation of CD23 expression is different on B and T cells, and that IFN-gamma acts differently in atopic and non-atopic individuals.
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Affiliation(s)
- M Corominas
- Immunology Service, Ciutat Sanitària i Universitària de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Spain
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34
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Bas J, Mestre M, Grinyó JM, Massip E, Alsina J, Castelao AM, Corominas M, Buendia E. Peripheral blood lymphoid subsets and long-term clinical course of kidney recipients: a longitudinal study. Cytometry 1998; 34:103-12. [PMID: 9579608 DOI: 10.1002/(sici)1097-0320(19980415)34:2<103::aid-cyto7>3.0.co;2-j] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A longitudinal study of peripheral blood lymphocyte subsets was performed in 23 renal allograft recipients treated with prophylactic antilymphocyte antibodies, CsA, and steroids. At day 0 samples were obtained before transplantation (Tx), and afterwards at months +1, +3, +6, +9, +12, +24, +36, and +48. In all patients, after the depletion of lymphoid subsets during antilymphocyte antibody treatment, CD8+ lymphocytes recovered and reached higher values than those observed prior to Tx. This was mainly due to an increase in CD8+CD45RA+ lymphocytes; in contrast, the levels of "memory" CD4+ T cells and the CD4+CD62L+ subset remained low during all the follow-up period. In patients with preserved graft function (n=14) (with creatinine levels below 200 micromol/mL), the initial, relative decrease in CD4+ T cells was never reversed and the recovery of CD8+ lymphocytes started early. They also presented a peak of HLA-DR antigen expression at 1 month, not observed in those patients displaying a suboptimal graft function. At 1 month, the patients with suboptimal graft function (n=9) (with creatinine levels above 200 micromol/mL) showed higher number of CD4+ T cells, delayed recovery of CD8+ lymphocytes, and higher percentage of activated lymphocytes from month +3 on than well-functioning kidney recipients. Both CD8+ lymphocytes and HLA-DR+ T cells, found at month + 1 post-Tx, were negatively correlated with the concentration of creatinine along the follow-up. Interestingly, the mean percentage of CD4+CD25+ T cells found 36 and 48 months after Tx were positively correlated with creatinine concentration at these times. These findings indicate that variations in the distribution of lymphocyte subsets are related with a long-term graft outcome. Within the first month after Tx, a rapid recovery of CD8+ lymphocytes, but not of CD4+ T cells, and a peak of HLA-DR expression, are associated with a good graft function. In contrast, long-term expression of activation markers is related with renal dysfunction.
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Affiliation(s)
- J Bas
- Immunology Services, Ciutat Sanitària Universitària de Bellvitge, Barcelona, Catalonia, Spain
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35
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Roch F, Serras F, Cifuentes FJ, Corominas M, Alsina B, Amorós M, López-Varea A, Hernández R, Guerra D, Cavicchi S, Baguñá J, García-Bellido A. Screening of larval/pupal P-element induced lethals on the second chromosome in Drosophila melanogaster: clonal analysis and morphology of imaginal discs. Mol Gen Genet 1998; 257:103-12. [PMID: 9491068 DOI: 10.1007/pl00008620] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We have carried out screens for lethal mutations on the second chromosome of Drosophila melanogaster that are associated with abnormal imaginal disc morphologies, particularly in the wing disc. From a collection of 164 P element-induced mutations with a late larva/pupa lethal phase we have identified 56 new loci whose gene products are required for normal wing disc development and for normal morphology of other larval organs. Genetic mosaics of these 56 mutant lines show clonal mutant phenotypes for 23 cell-viable mutations. These phenotypes result from altered cell parameters. Causal relationships between disc and clonal phenotypes are discussed.
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Affiliation(s)
- F Roch
- Centro de Biología Molecular Severo Ochoa, Madrid, Spain
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36
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Alsina B, Serras F, Baguñá J, Corominas M. patufet, the gene encoding the Drosophila melanogaster homologue of selenophosphate synthetase, is involved in imaginal disc morphogenesis. Mol Gen Genet 1998; 257:113-23. [PMID: 9491069 DOI: 10.1007/s004380050630] [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: 02/06/2023]
Abstract
Proliferation in imaginal discs requires cell growth and is linked to patterning processes controlled by secreted cell-signalling molecules. To identify new genes involved in the control of cell proliferation we have screened a collection of P-lacW insertion mutants that result in lethality in the larval/pupal stages, and characterized a novel gene, patufet (ptuf). Inactivation of ptuf by a P element insertion in the 5' untranslated region leads to aberrant imaginal disc morphology characterized by a reduction in mass of discs and disorganization of disc cells where no folding or patterning can be detected. Moreover, apoptotic cells can be observed in these small and abnormal mutant discs. To examine the role of ptuf we have studied its clonal behaviour in genetic mosaics generated by mitotic recombination. The mutation causes reduced cell viability, smaller cell size and stops vein differentiation. Non-autonomous effects, such as abnormal differentiation of wild-type cells surrounding the clones, are also observed. We have cloned the ptuf gene of Drosophila melanogaster and found that it encodes a selenophosphate synthetase, which is the first identified in insects. Mutant flies transformed with the full-length cDNA show complete reversion of lethality and disc phenotype. Northern blot analysis and in situ hybridization indicate that the ptuf gene is expressed in imaginal discs as well as at different stages of development. The synthesis of selenoproteins by the selenophosphate synthetase, the role of selenoproteins in the maintenance of the oxidant/antioxidant balance of the cell and its possible implications in imaginal disc morphogenesis are discussed.
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MESH Headings
- Amino Acid Sequence
- Animals
- Apoptosis
- Bacteria/genetics
- Bacterial Proteins/biosynthesis
- Bacterial Proteins/genetics
- Brain/abnormalities
- Brain/growth & development
- DNA Transposable Elements
- Drosophila Proteins
- Drosophila melanogaster/genetics
- Drosophila melanogaster/growth & development
- Evolution, Molecular
- Gene Expression Regulation, Developmental
- Genes, Insect
- Genes, Lethal
- Humans
- Insect Proteins/biosynthesis
- Insect Proteins/genetics
- Larva
- Molecular Sequence Data
- Morphogenesis/genetics
- Mutagenesis, Insertional
- Phosphotransferases/biosynthesis
- Phosphotransferases/genetics
- Pupa
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Selenium/metabolism
- Sequence Alignment
- Sequence Homology, Amino Acid
- Species Specificity
- Wings, Animal/abnormalities
- Wings, Animal/growth & development
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Affiliation(s)
- B Alsina
- Departament de Genética, Universitat de Barcelona, Spain
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37
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Cadaveira F, Corominas M, Rodríguez Holguín S, Sánchez-Turet M, Grau C. Reversibility of brain-stem evoked potential abnormalities in abstinent chronic alcoholics: one year follow-up. Electroencephalogr Clin Neurophysiol 1994; 90:450-5. [PMID: 7515788 DOI: 10.1016/0013-4694(94)90136-8] [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] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Brain-stem auditory evoked potentials (BAEPs) were studied in 34 chronic alcoholics who had been abstinent for 1 year, and in age- and sex-matched control subjects. The patients were examined 3 times, at 1 month, 5 months and 1 year after the start of the abstinence treatment. At 1 month of abstinence the alcoholics showed differences with respect to controls in the peak V latency (P < 0.01), and in the III-V (P < 0.01) and I-V (P < 0.01) intervals. After 1 year of abstinence a significant improvement in the V (P < 0.01), III-V (P < 0.01) and I-V (P < 0.01) parameters was recorded. The most notable development was in the 5-12 month period, with shortening in V latency (P < 0.01) and in the I-V interval (P < 0.01); in the first 5 months there was only shortening in the III-V interval (P < 0.01). This improvement was also indicated by a decrease in the number of patients with BAEP parameter abnormalities. The recovery of the functions impaired by chronic alcohol consumption after 1 year of abstinence was incomplete, although the tendency was towards normalization.
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Affiliation(s)
- F Cadaveira
- Departamento de Psicoloxía Clínica e Psicobioloxía, Universidade de Santiago de Compostela, Spain
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38
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Verdaguer J, Corominas M, Bas J, Valls A, Mestre M, Romeu A, Gonzalez L, Massip E, Buendia E. IgE antibodies against bovine serum albumin in a case of eosinophilic gastroenteritis. Allergy 1993; 48:542-6. [PMID: 8238812 DOI: 10.1111/j.1398-9995.1993.tb01112.x] [Citation(s) in RCA: 15] [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: 01/29/2023]
Abstract
Eosinophilic gastroenteritis is a disease characterized histologically by an eosinophilic infiltration of the gut. The cause of this disease remains unclear, although both food allergy and food intolerance have been implicated in its pathogenesis. We report the case of a 22-year-old man in whom gastrointestinal symptoms first appeared in childhood, with involvement of mucosa and muscularis layers of stomach and bowel. He presented high IgE blood levels, and his prick test was positive to bovine, pig, and lamb sera. Immunoblots from calf, pig, and lamb sera, incubated with the patient's serum and revealed by autoradiography, demonstrated the presence of a 65-kDa protein band that was recognized by IgE antibodies but not by IgG. This band corresponded to bovine serum albumin, while IgE did not show reactivity with human albumin. These data suggest a possible role for IgE-mediated hypersensitivity mechanisms in the pathogenesis of eosinophilic gastroenteritis.
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Affiliation(s)
- J Verdaguer
- Immunology Service, Hospital Duran i Reynals, Barcelona, Spain
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39
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Corominas M, Mestre M, Bas J, Verdaguer J, Valls A, Romeu A, Buendia E. CD23 expression on B-lymphocytes and its modulation by cytokines in allergic patients. Clin Exp Allergy 1993; 23:612-7. [PMID: 8221262 DOI: 10.1111/j.1365-2222.1993.tb00902.x] [Citation(s) in RCA: 21] [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: 01/29/2023]
Abstract
The aim of this study was to assess the expression of CD23 on peripheral blood B-cells, and its in vitro modulation by recombinant human interferon-gamma (IFN-gamma) in phytohaemagglutinin-(PHA) or recombinant human interleukin-4 (IL-4)-stimulated cultures in atopic patients with Dermatophagoides pteronyssinus hypersensitivity and in healthy non-atopic subjects. Atopic patients with asthma not receiving allergen-specific immunotherapy (n = 21) were studied and further compared with a group of atopic subjects with asthma under allergen-specific immunotherapy (n = 21). They were age-(+/- 5 yr) and sex-matched. The results were also compared with those obtained in the non-atopic group (n = 11). CD23 expression on B-lymphocytes and its modulation were analyzed by flow cytometry using conjugated monoclonal antibodies with a double immunofluorescence method. Atopic patients had an increase in the percentage of B-cells expressing CD23 in peripheral blood. Phytohaemagglutinin and IL-4 induced a rise in the percentage of CD23-positive B-cells in both atopic groups and non-atopic subjects. Phytohaemagglutinin provoked an increase in the intensity of CD23 expression on B-cells from stimulated cultures in all groups, while IL-4 only produced a significant increase in atopic patients. The presence of IFN-gamma decreased the CD23 expression on B-cells in PHA-stimulated culture of atopic patients, whereas it caused an increase in CD23 expression in the non-atopic group. Furthermore, the presence of IFN-gamma in IL-4-stimulated cultures induced a decrease in CD23 expression on B-cells in all cases.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Corominas
- Immunology Service, Hospital Duran i Reynals, Ciutat Sanitària de Bellvitge, L'Hospitalet de Llobregat Barcelona, Spain
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40
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Romeu MA, Mestre M, González L, Valls A, Verdaguer J, Corominas M, Bas J, Massip E, Buendia E. Lymphocyte immunophenotyping by flow cytometry in normal adults. Comparison of fresh whole blood lysis technique, Ficoll-Paque separation and cryopreservation. J Immunol Methods 1992; 154:7-10. [PMID: 1401946 DOI: 10.1016/0022-1759(92)90206-9] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.3] [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: 12/26/2022]
Abstract
In the present report we have assessed the extent to which Ficoll-Paque separation and cryopreservation of mononuclear cells alter the measurement of lymphocyte subsets by flow cytometry. Standard Ficoll-Paque separation increased the percentage of CD4+, CD19+ and CD4+CD45RA+ cells, as well as decreasing that of CD8+, and CD4+CD29+ cells, compared to the fresh whole blood lysis technique. Moreover, cryopreservation caused a depletion of CD4+ p80+ cells, but normal whole blood values were restored following a short incubation.
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Affiliation(s)
- M A Romeu
- Servei d'Immunologia, Hospital Duran i Reynals, Barcelona, Catalunya, Spain
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41
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Barrios L, Miró R, Corominas M, Pellicer A, Egozcue J. A method to extract DNA for molecular studies from cells fixed in Carnoy. Cancer Genet Cytogenet 1992; 59:217-8. [PMID: 1581887 DOI: 10.1016/0165-4608(92)90219-x] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We describe a simple method for isolation of high-molecular-weight DNA from cells fixed in Carnoy's solution for cytogenetic studies. DNA samples were extracted from NIH3T3 cells, and no apparent degradation was noticed. This method should be useful for molecular analysis of cells fixed for cytogenetic studies.
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Affiliation(s)
- L Barrios
- Departament de Biologia Cellular i Fisiologia Universitat Autonoma de Barcelona, Spain
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Mestre M, González C, Griño JM, Valls A, Bonete J, Mané E, Corominas M, Bas J, Romeu A, Buendia E. Sequential monitoring of immunoregulatory T cell subsets in renal transplantation. Transplant Proc 1992; 24:73-5. [PMID: 1539351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- M Mestre
- Immunology Service, Hospital de Bellvitge, L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain
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Corominas M. Computerization of intraocular lens consignment. Hosp Mater Manage Q 1991; 13:15-7. [PMID: 10114440] [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: 02/11/2023]
Abstract
Consignments can save a tremendous amount of time and reduce ordering costs when they are managed effectively. To special order the over 5,000 lenses used by BPEI in a year would require a much greater expenditure of time and dollars. Although consignment is a widely used method for maintaining inventories of IOLs, many problems such as obsolescence, shortages, and billing discrepancies can occur if close attention is not given to them. Based on the volume and variety of lenses used in a particular organization, computerization of consignments may be of great value.
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44
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Corominas M, Perucho M, Newcomb EW, Pellicer A. Differential expression of the normal and mutated K-ras alleles in chemically induced thymic lymphomas. Cancer Res 1991; 51:5129-33. [PMID: 1717139] [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: 12/28/2022]
Abstract
The presence of point mutations in the K-ras gene was examined in murine thymic lymphomas induced by a single dose of N-methylnitrosourea by the RNase A mismatch cleavage method and by allelic-specific oligonucleotide hybridization of in vitro amplified DNA by polymerase chain reaction. The results show that the frequency of mutations is lower than that of tumors induced by multiple N-methylnitrosourea treatments. Four mutations identified were the aspartic acid at codon 12, a G:C to A:T transition in its second position. A G:C to T:A transversion in codon 146 was also found in one thymic lymphoma, changing the amino acid alanine to serine. The use of the RNase A assay allowed an estimation of the relative expression levels of both normal and mutant K-ras alleles. The results show that in approximately one half of the tumors the mutant allele is predominantly expressed, suggesting that the normal allele has been lost or that the mutant allele has been amplified relative to the normal. Altogether, these findings are consistent with ras mutations occurring in some instances during tumor development and with a ras effect being not strictly dominant but favoring selection for increasing levels of expression from the oncogenic allele.
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Affiliation(s)
- M Corominas
- Department of Pathology, New York University Medical Center, New York 10016
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Corominas M, Sloan SR, Leon J, Kamino H, Newcomb EW, Pellicer A. ras activation in human tumors and in animal model systems. Environ Health Perspect 1991; 93:19-25. [PMID: 1773791 PMCID: PMC1568045 DOI: 10.1289/ehp.919319] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Environmental agents such as radiation and chemicals are known to cause genetic damage. Alterations in a limited set of cellular genes called proto-oncogenes lead to unregulated proliferation and differentiation. We have studied the role of the ras gene family in carcinogenesis using two different animal models. In one case, thymic lymphomas were induced in mice by either gamma or neutron radiation, and in the other, keratoacanthomas were induced in rabbit skin with dimethylbezanthracene. Human keratoacanthomas similar to the ones induced in rabbits were also analyzed. We found that different types of radiation such as gamma rays and neutrons, induced different point mutations in ras genes. A novel K-ras mutation in codon 146 has been found in thymic lymphomas induced by neutrons. Keratoacanthomas induced in rabbit skin by dimethylbenzanthracene show a high frequency of H-ras-activated genes carrying a mutation in codon 61. The same is observed in human keratoacanthomas, although mutations are in both the 12th and the 61st codons of the H-ras gene. H-ras activation is less frequent in human squamous cell carcinomas than in keratoacanthomas, suggesting that ras genes could play a role in vivo in differentiation as well as in proliferation.
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Affiliation(s)
- M Corominas
- Department of Pathology, New York University Medical Center, NY 10016
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46
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Corominas M, Leon J, Kamino H, Cruz-Alvarez M, Novick SC, Pellicer A. Oncogene involvement in tumor regression: H-ras activation in the rabbit keratoacanthoma model. Oncogene 1991; 6:645-51. [PMID: 1840681] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Activated H-ras genes are present in a number of skin tumors induced in animals by carcinogen treatment. The involvement of the ras oncogenes in tumorigenesis was investigated in keratoacanthomas, benign and self-regressing tumors, as well as malignant squamous cell carcinomas. Both tumors were induced in rabbit ears by repeated applications of 7,12 dimethylbenz(a)anthracene (DMBA). The rabbit H-ras gene was cloned and sequenced. PCR analysis revealed that approximately 82% of the keratoacanthoma DNAs contained an A:T to T:A transversion in codon 61. The relative levels of H-ras transcript were increased in keratoacanthomas compared to normal skin and the activated allele was expressed in tumors, even during the regressing phase. Although a G:C to A:T mutation in codon 12 of the H-ras and an activated N-ras gene were found in two squamous cell carcinomas, the frequency of H-ras activation in codon 61 was much lower (40%) in the malignant tumours induced by the same carcinogen treatment. Therefore, DMBA induced at least two types of genetic lesions in this system: H-ras activation, present in most regressing keratoacanthomas, and activation of other unidentified oncogenes which may result in the development of malignant tumors. Our observations indicate that expression of an activated H-ras gene, in this system, is neither sufficient to induce a malignant phenotype nor even capable of maintaining the growth of a benign tumor and suggest that it could be involved in tumor regression.
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MESH Headings
- 9,10-Dimethyl-1,2-benzanthracene
- Amino Acid Sequence
- Animals
- Base Sequence
- Carcinoma, Squamous Cell/chemically induced
- Carcinoma, Squamous Cell/genetics
- Cloning, Molecular
- DNA/analysis
- DNA/isolation & purification
- Gene Expression Regulation, Neoplastic
- Genes, ras/drug effects
- Keratoacanthoma/chemically induced
- Keratoacanthoma/genetics
- Molecular Sequence Data
- Mutation
- Neoplasm Regression, Spontaneous/genetics
- Polymerase Chain Reaction
- RNA, Messenger/biosynthesis
- Rabbits
- Sequence Homology, Nucleic Acid
- Skin Neoplasms/chemically induced
- Skin Neoplasms/genetics
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Affiliation(s)
- M Corominas
- Department of Pathology, New York University Medical Center, New York 10016
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Corominas M, Bas J, Romeu A, Valls A, Massip E, González L, Mestre M, Buendía E. Hypersensitivity reaction after orgotein (superoxide dismutase) administration. Allergol Immunopathol (Madr) 1990; 18:297-9. [PMID: 2151501] [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: 12/30/2022]
Abstract
Orgotein is being increasingly used in the treatment of some inflammatory disorders. Up to now no hypersensitivity reaction has been reported. We present the case of an allergic reaction demonstrated by both, "in vivo" and "in vitro" tests. This finding further supports the need for an adequate control during and after orgotein administration.
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Affiliation(s)
- M Corominas
- Allergy Unit, Hospital de Bellvitge Princeps d'Espanya, Barcelona, Spain
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48
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Newcomb EW, Corominas M, Bayona W, Pellicer A. Multistage carcinogenesis in murine thymocytes: involvement of oncogenes, chromosomal imbalances and T cell growth factor receptor. Anticancer Res 1989; 9:1407-15. [PMID: 2686536] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
An animal model of carcinogenesis has been exploited to analyze the various events involved in carcinogen-induced T cell lymphomagenesis. Two carcinogenic agents, the alkylating agent N-methylnitrosourea (NMU) and ionizing gamma-radiation, induce tumors in C57BL/6J mice that are phenotypically and histologically identical. Are the genetic events similar or different in the T cell tumors produced by these two carcinogenic agents? NMU treatment produced a different spectrum of activated oncogenes from gamma-irradiation. The K-ras oncogene was preferentially activated in all of the NMU-induced tumors, most frequently by a GGT to GAT transition in codon 12. Ionizing gamma-radiation produced two different transforming activities. Approximately half of the radiation-induced tumors contained activated N-ras genes and half contained a novel non-ras transforming activity. Analysis of NMU- and gamma-irradiated treated animals for chromosomal abnormalities showed anomalies early in the disease. Although both agents produce tumors containing trisomy of chromosome 15, the timing of this event appears to be different occurring early in NMU-induced tumors and later in gamma-radiation induced tumors. In addition, a unique marker chromosome consisting of a translocation between chromosomes one and five appears to be involved in the early stages of radiation-induced disease and may be associated with the novel transforming activity detected in these same tumors. Expression of receptors for the T cell growth factor (IL-2R) is similar in both NMU- and gamma-irradiation induced tumors. Changes in the expression of IL-2R on different T cell populations with disease progression may account for thymus dependent and thymus independent phases of malignant T cell growth.
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Affiliation(s)
- E W Newcomb
- Department of Pathology, New York University Medical Center, NY 10016
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Corominas M, Kamino H, Leon J, Pellicer A. Oncogene activation in human benign tumors of the skin (keratoacanthomas): is HRAS involved in differentiation as well as proliferation? Proc Natl Acad Sci U S A 1989; 86:6372-6. [PMID: 2668964 PMCID: PMC297841 DOI: 10.1073/pnas.86.16.6372] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.0] [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: 01/02/2023] Open
Abstract
In vitro DNA amplification followed by oligonucleotide mismatch hybridization was used to study the frequency of HRAS mutations in the benign self-regressing skin tumors keratoacanthomas and in squamous cell carcinomas. We used freshly obtained keratoacanthomas as well as Formalin-fixed paraffin-embedded tissues from both types of tumors. DNA from 50 samples of each tumor type was analyzed for activating mutations involving codons 12 and 61. A relatively high percentage (30%) of HRAS mutations was found in the keratoacanthomas compared with 13% in the squamous cell carcinomas. The most frequent mutation identified is the A-T-to-T.A transversion in the second position of codon 61. The present findings demonstrate the involvement of the HRAS oncogene in human benign tumors. Moreover, they indicate that an activated HRAS oncogene is not sufficient to maintain a neoplastic phenotype and argue against a role of HRAS in the progression of skin tumorigenesis.
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Affiliation(s)
- M Corominas
- Department of Pathology, New York University Medical Center, NY 10016
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50
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Newcomb EW, Diamond LE, Sloan SR, Corominas M, Guerrerro I, Pellicer A. Radiation and chemical activation of ras oncogenes in different mouse strains. Environ Health Perspect 1989; 81:33-7. [PMID: 2667982 PMCID: PMC1567548 DOI: 10.1289/ehp.898133] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
A survey of a large series of radiation- or chemically induced thymic lymphomas in (AKR X RF)F1, RF/J, 129/J, and C57BL/6J mouse strains for activated ras oncogenes showed that of the tumors containing transforming activity, in more than 75% of the cases this activity segregated with either K-ras or the N-ras gene. H-ras activity was never detected. The genetic background of the host influenced susceptibility to tumor induction and oncogene activation. The K-ras gene was preferentially activated over the N-ras gene (approximately 2:1) whether the inducing agent was radiation or the chemical N-nitrosomethylurea. The activating mutation for the K-ras gene was consistently identified as a GGT to GAT transition in codon 12. In contrast, several different mutations of the N-ras gene were identified and localized to codons 12, 13, or 61. Assessment of the allelic composition of the ras locus shows that some proportion of the tumors lost the normal ras allele.
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Affiliation(s)
- E W Newcomb
- Department of Pathology, New York University Medical Center, NY 10016
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