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Ramasco F, Aguilar G, Aldecoa C, Bakker J, Carmona P, Dominguez D, Galiana M, Hernández G, Kattan E, Olea C, Ospina-Tascón G, Pérez A, Ramos K, Ramos S, Tamayo G, Tuero G. Towards the personalization of septic shock resuscitation: the fundamentals of ANDROMEDA-SHOCK-2 trial. Rev Esp Anestesiol Reanim (Engl Ed) 2024; 71:112-124. [PMID: 38244774 DOI: 10.1016/j.redare.2024.01.003] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 07/04/2023] [Indexed: 01/22/2024]
Abstract
Septic shock is a highly lethal and prevalent disease. Progressive circulatory dysfunction leads to tissue hypoperfusion and hypoxia, eventually evolving to multiorgan dysfunction and death. Prompt resuscitation may revert these pathogenic mechanisms, restoring oxygen delivery and organ function. High heterogeneity exists among the determinants of circulatory dysfunction in septic shock, and current algorithms provide a stepwise and standardized approach to conduct resuscitation. This review provides the pathophysiological and clinical rationale behind ANDROMEDA-SHOCK-2, an ongoing multicenter randomized controlled trial that aims to compare a personalized resuscitation strategy based on clinical phenotyping and peripheral perfusion assessment, versus standard of care, in early septic shock resuscitation.
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Affiliation(s)
- F Ramasco
- Hospital Universitario de La Princesa, Madrid, Spain.
| | - G Aguilar
- Hospital Clínico Universitario de Valencia, Spain
| | - C Aldecoa
- Hospital Universitario Río Hortega, Valladolid, Spain
| | - J Bakker
- Departamento de Medicina Intensiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Región Metropolitana, Chile; The Latin American Intensive Care Network (LIVEN); Department of Intensive Care, Erasmus MC University Medical Center, Rotterdam, Netherlands; Division of Pulmonary Critical Care, and Sleep Medicine, New York University and Columbia University, New York, USA
| | - P Carmona
- Hospital Universitari i Politècnic La Fe, Valencia, Spain
| | - D Dominguez
- Hospital Universitario Ntra. Sra. de Candelaria, Santa Cruz de Tenerife, Spain
| | - M Galiana
- Hospital General Universitario Doctor Balmis, Alicante, Spain
| | - G Hernández
- Departamento de Medicina Intensiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Región Metropolitana, Chile; The Latin American Intensive Care Network (LIVEN)
| | - E Kattan
- Departamento de Medicina Intensiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Región Metropolitana, Chile; The Latin American Intensive Care Network (LIVEN)
| | - C Olea
- Hospital Universitario 12 de Octubre, Madrid. Spain
| | - G Ospina-Tascón
- The Latin American Intensive Care Network (LIVEN); Department of Intensive Care, Fundación Valle del Lili, Cali, Colombia; Translational Research Laboratory in Critical Care Medicine (TransLab-CCM), Universidad Icesi, Cali, Colombia
| | - A Pérez
- Hospital General Universitario de Elche, Spain
| | - K Ramos
- Departamento de Medicina Intensiva, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Región Metropolitana, Chile; The Latin American Intensive Care Network (LIVEN)
| | - S Ramos
- Hospital General Universitario Gregorio Marañón, Madrid, Spain
| | - G Tamayo
- Hospital Universitario de Cruces, Baracaldo, Vizcaya, Spain
| | - G Tuero
- Hospital Can Misses, Ibiza, Spain
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Al-Riyami AZ, Burnouf T, Wood EM, Devine DV, Oreh A, Apelseth TO, Goel R, Bloch EM, van Den Berg K, Getshen M, Louw V, Ang AL, Lee CK, Rahimi-Levene N, Stramer SL, Vassallo R, Schulze TJ, Patidar GK, Pandey HC, Dubey R, Badawi M, Hindawi S, Meshi A, Matsushita T, Sorrentino E, Grubovic Rastvorceva RM, Bazin R, Vermeulen M, Nahirniak S, Tsang HC, Vrielink H, Triyono T, Addas-Carvalho M, Hećimović A, Torres OW, Mutindu SM, Bengtsson J, Dominguez D, Sayedahmed A, Hanisa Musa R, Gautam B, Herczenik E, So-Osman C. International Society of Blood Transfusion survey of experiences of blood banks and transfusion services during the COVID-19 pandemic. Vox Sang 2022; 117:822-830. [PMID: 35262978 PMCID: PMC9115426 DOI: 10.1111/vox.13256] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 01/23/2022] [Accepted: 01/24/2022] [Indexed: 10/31/2022]
Abstract
BACKGROUND AND OBJECTIVES The coronavirus disease 2019 (COVID-19) pandemic has impacted blood systems worldwide. Challenges included maintaining blood supplies and initiating the collection and use of COVID-19 convalescent plasma (CCP). Sharing information on the challenges can help improve blood collection and utilization. MATERIALS AND METHODS A survey questionnaire was distributed to International Society of Blood Transfusion members in 95 countries. We recorded respondents' demographic information, impacts on the blood supply, CCP collection and use, transfusion demands and operational challenges. RESULTS Eighty-two responses from 42 countries, including 24 low- and middle-income countries, were analysed. Participants worked in national (26.8%) and regional (26.8%) blood establishments and hospital-based (42.7%) institutions. CCP collection and transfusion were reported by 63% and 36.6% of respondents, respectively. Decreases in blood donations occurred in 70.6% of collecting facilities. Despite safety measures and recruitment strategies, donor fear and refusal of institutions to host blood drives were major contributing factors. Almost half of respondents working at transfusion medicine services were from large hospitals with over 10,000 red cell transfusions per year, and 76.8% of those hospitals experienced blood shortages. Practices varied in accepting donors for blood or CCP donations after a history of COVID-19 infection, CCP transfusion, or vaccination. Operational challenges included loss of staff, increased workloads and delays in reagent supplies. Almost half of the institutions modified their disaster plans during the pandemic. CONCLUSION The challenges faced by blood systems during the COVID-19 pandemic highlight the need for guidance, harmonization, and strengthening of the preparedness and the capacity of blood systems against future infectious threats.
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Affiliation(s)
- Arwa Z Al-Riyami
- Department of Haematology, Sultan Qaboos University Hospital, Muscat, Sultanate of Oman
| | - Thierry Burnouf
- Graduate Institute of Biomedical Materials and Tissue Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan.,International PhD Programme in Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei, Taiwan
| | - Erica M Wood
- Transfusion Research Unit, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Dana V Devine
- Centre for Innovation, Canadian Blood Services, Vancouver, British Columbia, Canada.,Centre for Blood Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Adaeze Oreh
- National Blood Service Commission, Federal Ministry of Health, Abuja, Nigeria
| | - Torunn Oveland Apelseth
- Department of Immunology and Transfusion Medicine, Haukeland University Hospital, Bergen, Norway
| | - Ruchikha Goel
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.,Division of Hematology/Oncology, Simmons Cancer Institute at SIU School of Medicine and Mississippi Valley Regional Blood Center, Springfield, Illinois, USA
| | - Evan M Bloch
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Karin van Den Berg
- Transfusion Medicine and Technical Services Division, South African National Blood Service, Roodepoort, South Africa.,Division of Clinical Haematology, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Mahrukh Getshen
- National Blood Bank, Department of Pathology and Laboratory Medicine, Jigme Dorji Wangchuck National Referral Hospital, Thimphu, Bhutan
| | - Vernon Louw
- Division of Clinical Haematology, Department of Medicine, University of Cape Town and Groote Schuur Hospital, Cape Town, South Africa
| | - Ai Leen Ang
- Blood Services Group, Health Sciences Authority, Singapore, Singapore
| | - Cheuk Kwong Lee
- Hong Kong Red Cross Blood Transfusion Service, Hong Kong SAR
| | | | - Susan L Stramer
- Scientific Affairs, American Red Cross, Gaithersburg, Maryland, USA
| | | | | | - Gopal Kumar Patidar
- Department of Transfusion Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Hem Chandra Pandey
- Department of Transfusion Medicine, All India Institute of Medical Sciences, New Delhi, India
| | - Rounak Dubey
- Department of Transfusion Medicine, NRI Academy of Medical Sciences, Andhra Pradesh, India
| | - Maha Badawi
- Haematology Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Salwa Hindawi
- Haematology Department, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdullah Meshi
- Department of Blood Bank, King Fahd Central Hospital, Jazan, Saudi Arabia
| | | | | | - Rada M Grubovic Rastvorceva
- Institute for Transfusion Medicine of RNM, Skopje, North Macedonia.,Faculty of Medical Sciences, University Goce Delcev, Štip, North Macedonia
| | - Renée Bazin
- Medical Affairs and Innovation, Héma-Québec, Québec, Canada
| | - Marion Vermeulen
- Transfusion Medicine and Technical Services Division, South African National Blood Service, Roodepoort, South Africa
| | - Susan Nahirniak
- Transfusion and Transplantation Medicine, Alberta Precision Laboratories, Calgary, Alberta, Canada
| | | | - Hans Vrielink
- Unit Transfusion Medicine, Sanquin Blood Supply Foundation, Amsterdam, the Netherlands
| | - Teguh Triyono
- Faculty of Medicine, Universitas Gadjah Mada/Dr Sardjito Hospital, Yogyakarta, Indonesia
| | | | - Ana Hećimović
- Croatian Institute of Transfusion Medicine, Zagreb, Croatia
| | - Oscar W Torres
- Transfusion Medicine Service, Hospital Churruca, Buenos Aires, Argentina
| | - Samclide M Mutindu
- Unit of Transfusion Medicine, Centre Hospitalier Monkole, Kinshasa, Democratic Republic of Congo
| | - Jesper Bengtsson
- Department of Clinical Immunology and Transfusion Medicine, University and Regional Laboratories, Lund, Sweden
| | - Diego Dominguez
- Centro Regional de Hemoterapia, Hospital Zonal Caleta Olivia, Caleta Olivia, Argentina
| | - Ahmed Sayedahmed
- Omdurman Islamic University/National Central Laboratory, Khartoum, Sudan
| | - Rozi Hanisa Musa
- Clinical Transfusion, National Immunohematology Reference Laboratory, National Blood Centre, Kuala Lumpur, Malaysia
| | | | | | - Cynthia So-Osman
- Unit Transfusion Medicine, Sanquin Blood Supply Foundation, Amsterdam, the Netherlands.,Department of Haematology, Erasmus Medical Centre, Rotterdam, the Netherlands
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Triolo J, Buchs N, Tessitore E, Hannouche D, Dominguez D, Kalbermatten D, Oranges C. VP3: Pelvic Reconstruction After Large Sacral Chordoma Resection Using Acellular Dermal Matrix and Double Pedicled Gracilis Muscle Flap Combined with Gluteal Fasciocutaneous Rotation Flap. Plast Reconstr Surg Glob Open 2022. [PMCID: PMC8729200 DOI: 10.1097/01.gox.0000817688.18343.a0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dominguez D, Levin S, Cheng T, Kalish J, Eslami M, Siracuse J. Selective Non-Operative and Delayed Management of Severe Asymptomatic Carotid Artery Stenosis. J Vasc Surg 2021. [DOI: 10.1016/j.jvs.2021.01.005] [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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Ramírez S, Dominguez D, Villalobos G, Ortega J, Salmerón J. Alimentación de ovinos con heno de avena cosechado en dos etapas de madurez en el noroeste de Chihuahua, México. ARCH ZOOTEC 2018. [DOI: 10.21071/az.v67i259.3785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Manipular la variedad y la etapa de madurez al corte del heno de avena (Avena sativa L.), puede mejorar el valor nutricional del forraje y por tanto la respuesta productiva de los animales. Se evaluó el efecto de la alimentación de corderas con heno de tres variedades de avena, cosechadas en dos etapas de madurez. El estudio se llevó a cabo en el noroeste del estado de Chihuahua, México. La hipótesis fue que la avena cosechada en madurez fisiológica presenta mayor proporción de grano lo que mejora el valor nutritivo del forraje y la ganancia de peso en las corderas. Las variedades de avena evaluadas fueron Cuauhtémoc, Menonita y Bachíniva. Las avenas fueron cosechadas para heno en las etapas de grano lechoso-masoso (L-Masoso) y madurez fiológica (M-Fisiológica). Se usaron 72 corderas (21,2 ± 3,7 kg), que fueron agrupadas por peso y alimentadas ad libitum durante 63 d, con una ración compuesta de 65 % heno de avena y 35 % concentrado. El diseño fue en bloques completos al azar con arreglo factorial 3 x 2 entre variedad y etapas de madurez. La composición química de los forrajes fue similar entre las variedades de avena. No se observó efecto de variedad ni etapa de madurez sobre el comportamiento productivo de las corderas. El consumo de materia seca, la ganancia diaria de peso y la conversión alimenticia en L-Masoso y M-Fisiologica fueron 1,03 y 1,01 kg, 119 y 130 g, y 9,6 y 8,9 kg a-1 d-1, respectivamente. La falta de respuesta en los animales se atribuyó a la composición química similar que presentaron los forrajes. Aunque la avena cosechada en L-Masoso mejoró (P
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Arce-Saldaña L, Espinoza-Mosso E, Castro-Rodríguez B, Portillo-López A, Muñoz-Muñoz F, Dominguez D, Farías M, Soto G. Plasma synthesis of carbon powder with embedded Fe3C nanoparticles for magnetic separation of biomolecules. ADV POWDER TECHNOL 2018. [DOI: 10.1016/j.apt.2018.01.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Valtueña J, Dominguez D, Til L, González-Gross M, Drobnic F. High prevalence of vitamin D insufficiency among elite Spanish athletes the importance of outdoor training adaptation. NUTR HOSP 2014; 30:124-31. [PMID: 25137271 DOI: 10.3305/nh.2014.30.1.7539] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
INTRODUCTION The discovery of vitamin D muscle receptors in the last few years suggested a significant role in muscle tissue, pointing out athletes as a special group. Specific data are scarce. AIM The main aim of the current paper was to provide, for the first time, comparable data about vitamin D status in elite Spanish athletes by sport, age, season and training environment. METHODS Four hundred and eight elite athletes with a mean age of 22.8 ± 8.4 years were recruited from the High-performance sport centre in Barcelona for this cross-sectional study. Athletes from 34 different sports modalities were analysed. Data were available for vitamin D status, training environment, seasonality and number of medical visits. All data were analysed using SPSS version 18.0. RESULTS Mean 25(OH)D of all athletes was 56.7 ± 23.4 nmol/L. Approximately 82% of the athletes were below the optimal levels, (< 75nmol/l), 45% had moderate deficient levels (< 50 nmol/L) and 6% had severe deficiency (< 27.5 nmol/L). We have observed a steady increase in 25(OH)D concentrations with increasing age (p < 0.01) Highest levels were observed in those subjects training outdoors compared with those training indoor (p.
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Affiliation(s)
- Jara Valtueña
- mFine Research Group. Department of Health and Human Performance. Faculty of Physical Activity and Sport Sciences (INEF). Universidad Politécnica de Madrid. Spain..
| | | | - L Til
- GIRSANE-CAR. Sant Cugat del Vallés. Spain. Centre Sanitari de Terrassa. Spain. Medical Services F. C. Barcelona. Barcelona. Spain
| | - M González-Gross
- mFine Research Group. Department of Health and Human Performance. Faculty of Physical Activity and Sport Sciences (INEF). Universidad Politécnica de Madrid. Spain
| | - F Drobnic
- GIRSANE-CAR. Sant Cugat del Vallés. Spain. Medical Services F. C. Barcelona. Barcelona. Spain
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9
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Varona M, Soriano A, Aguirre-Jaime A, Barrera M, Medina M, Bañon N, Mendez S, Lopez E, Portero J, Dominguez D, Gonzalez A. Statistical Quality Control Charts for Liver Transplant Process Indicators: Evaluation of a Single-Center Experience. Transplant Proc 2012; 44:1517-22. [DOI: 10.1016/j.transproceed.2012.05.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Darbellay P, Uçkay I, Dominguez D, Mugnai D, Filtri L, Lew D, Assal M. [Diabetic foot infection: a multidisciplinary approach]. Rev Med Suisse 2011; 7:894-897. [PMID: 21674892] [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: 05/30/2023]
Abstract
Diabetic foot infection is a frequent, multifactorial and multifacettal disease. Its management requires an interdisciplinary collaboration. Multiple medical and surgical specialties are enrolled for its prevention and treatment, for good reasons. Concomitant management by various specialists shows a significant reduction in amputation rates. We review the issues of this interdisciplinary collaboration.
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Affiliation(s)
- P Darbellay
- Service de médecine interne générale, HUG et Faculté de médecine, Université de Genève.
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Abstract
A wide range of networks, including those with small-world topology, can be modeled by the connectivity ratio and randomness of the links. Both learning and attractor abilities of a neural network can be measured by the mutual information (MI) as a function of the load and the overlap between patterns and retrieval states. In this letter, we use MI to search for the optimal topology with regard to the storage and attractor properties of the network in an Amari-Hopfield model. We find that while an optimal storage implies an extremely diluted topology, a large basin of attraction leads to moderate levels of connectivity. This optimal topology is related to the clustering and path length of the network. We also build a diagram for the dynamical phases with random or local initial overlap and show that very diluted networks lose their attractor ability.
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13
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Arranz J, Soriano A, Garcia I, García I, Concepción MT, Navarro J, Arteaga A, Filella X, Bravo P, Barrera M, Escribano S, Jiménez A, Moneva E, Fernandez J, Varona A, Herrero E, Dominguez D. Effect of proinflammatory cytokines (IL-6, TNF-alpha, IL-1beta) on hemodynamic performance during orthotopic liver transplantation. Transplant Proc 2003; 35:1884-7. [PMID: 12962834 DOI: 10.1016/s0041-1345(03)00603-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [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 Proinflammatory cytokines (IL-6, IL-1beta, TNF-alpha) released during liver transplantation may affect hemodynamic stability. The aim of the present study was to analyze the association between IL-6, TNF-alpha, and IL-1beta and systemic vascular resistance during the phases of liver transplantation. MATERIAL AND METHODS The proinflammatory cytokines IL-6, IL-1beta, and TNF-alpha were analyzed in the blood of 20 consecutive patients who underwent transplantation. Blood samples were drawn from the pulmonary artery at serial times during surgery. Hemodynamic parameters were determined using a cardiac output monitor. Correlations between parameters were analyzed using the Spearman's rho and Kendall's tau-b methods. RESULTS Both in the vena cava and the pulmonary artery, significant association was observed between basal values of IL-6 during hepatectomy and systemic vascular resistance during the phases of liver transplantation: hepatectomy phase (r=.76, P=.02), anhepatic phase (r=.78, P=.03) and reperfusion phase (r=.87, P=.005). CONCLUSIONS Basal values of IL-6 may be considered a prognostic factor for hemodynamic performance during the phases of liver transplantation.
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Affiliation(s)
- J Arranz
- Liver Transplant Unit, Research Unit, University Hospital Clinic (Barcelona), University Hospital NS de Candelaria, Tenerife, Spain.
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Dominguez D, Kislig E, Altmann M, Trachsel H. Structural and functional similarities between the central eukaryotic initiation factor (eIF)4A-binding domain of mammalian eIF4G and the eIF4A-binding domain of yeast eIF4G. Biochem J 2001; 355:223-30. [PMID: 11256967 PMCID: PMC1221730 DOI: 10.1042/0264-6021:3550223] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The translation eukaryotic initiation factor (eIF)4G of the yeast Saccharomyces cerevisiae interacts with the RNA helicase eIF4A (a member of the DEAD-box protein family; where DEAD corresponds to Asp-Glu-Ala-Asp) through a C-terminal domain in eIF4G (amino acids 542-883). Mammalian eIF4G has two interaction domains for eIF4A, a central domain and a domain close to the C-terminus. This raises the question of whether eIF4A binding to eIF4G is conserved between yeast and mammalian cells or whether it is different. We isolated eIF4G1 mutants defective in eIF4A binding and showed that these mutants are strongly impaired in translation and growth. Extracts from mutants displaying a temperature-sensitive phenotype for growth have low in vitro translation activity, which can be restored by addition of the purified eIF4G1-eIF4E complex, but not by eIF4E alone. Analysis of mutant eIF4G(542-883) proteins defective in eIF4A binding shows that the interaction of yeast eIF4A with eIF4G1 depends on amino acid motifs that are conserved between the yeast eIF4A-binding site and the central eIF4A-binding domain of mammalian eIF4G. We show that mammalian eIF4A binds tightly to yeast eIF4G1 and, furthermore, that mutant yeast eIF4G(542-883) proteins, which do not bind yeast eIF4A, do not interact with mammalian eIF4A. Despite the conservation of the eIF4A-binding site in eIF4G and the strong sequence conservation between yeast and mammalian eIF4A (66% identity; 82% similarity at the amino acid level) mammalian eIF4A does not substitute for the yeast factor in vivo and is not functional in a yeast in vitro translation system.
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Affiliation(s)
- D Dominguez
- Institute for Biochemistry and Molecular Biology, University of Berne, Bühlstrasse 28, CH-3012 Bern, Switzerland
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Gonzalez LM, Lindsey AE, Hjelle B, Dominguez D, Brown J, Goade D, Jonsson CB. Prevalence of antibodies to Sin Nombre virus in humans living in rural areas of southern New Mexico and western Texas. Virus Res 2001; 74:177-9. [PMID: 11226584 DOI: 10.1016/s0168-1702(00)00227-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- L M Gonzalez
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003, USA
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Tan C, Costello P, Sanghera J, Dominguez D, Baulida J, de Herreros AG, Dedhar S. Inhibition of integrin linked kinase (ILK) suppresses beta-catenin-Lef/Tcf-dependent transcription and expression of the E-cadherin repressor, snail, in APC-/- human colon carcinoma cells. Oncogene 2001; 20:133-40. [PMID: 11244511 DOI: 10.1038/sj.onc.1204052] [Citation(s) in RCA: 206] [Impact Index Per Article: 9.0] [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: 11/09/2022]
Abstract
Loss of functional adenomatous polyposis coli (APC) protein results in the stabilization of cytosolic beta-catenin and activation of genes that are responsive to Lef/Tcf family transcription factors. We have recently shown that an independent cell adhesion and integrin linked kinase (ILK)-dependent pathway can also activate beta-catenin/LEF mediated gene transcription and downregulate E-cadherin expression. In addition, ILK activity and expression are elevated in adenomatous polyposis and colon carcinomas. To examine the role of this pathway in the background of APC mutations we inhibited ILK activity in APC-/- human colon carcinoma cell lines. In all cases, inhibition of ILK resulted in substantial inhibition of TCF mediated gene transcription and inhibition of transcription and expression of the TCF regulated gene, cyclin D1. Inhibition of ILK resulted in decreased nuclear beta-catenin expression, and in the inhibition of phosphorylation of GSK-3 and stimulation of its activity, leading to accelerated degradation of beta-catenin. In addition, inhibition of ILK suppressed cell growth in culture as well as growth of human colon carcinoma cells in SCID mice. Strikingly, inhibition of ILK also resulted in the transcriptional stimulation of E-cadherin expression and correlated with the inhibition of gene transcription of snail, a repressor of E-cadherin gene expression. Overexpression of ILK caused a stimulation of expression of snail, but snail expression was found not to be regulated by beta-catenin/Tcf. These data demonstrate that ILK can regulate beta-catenin/TCF and snail transcription factors by distinct pathways. We propose that inhibition of ILK may be a useful strategy in the control of progression of colon as well as other carcinomas. Oncogene (2001) 20, 133 - 140.
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Affiliation(s)
- C Tan
- BC Cancer Agency and Jack Bell Research Centre, 2660 Oak Street, Vancouver, BC V6H 3Z6, Canada
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Hohn T, Corsten S, Dominguez D, Fütterer J, Kirk D, Hemmings-Mieszczak M, Pooggin M, Schärer-Hernandez N, Ryabova L. Shunting is a translation strategy used by plant pararetroviruses (Caulimoviridae). Micron 2001; 32:51-7. [PMID: 10900380 DOI: 10.1016/s0968-4328(00)00020-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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: 01/07/2023]
Abstract
In eukaryotes standard initiation of translation involved 40S ribosome scanning to bridge the distance from the cap to the initiation codon. Recently deviations from that rule had been described, including "internal initiation", "poly-A dependent translation", and "ribosome shunting". In ribosome shunting, ribosomes start scanning at the cap but large portions of the leader are skipped. Thereby the secondary structure of the shunted region is preserved. Scanning in plant caulimoviruses involve a small open reading frame properly spaced in front of a strong stem structure, and, in order to function, the small open reading frome has to be translated and the peptide released. This arrangement can be mimicked by artificial small open reading frames and stem structures. Shunting with viral and synthetic leaders occurs not only in plant-, but also in mammalian and yeast systems. Thus it responds to an intrinsic property of the eukaryotic translational machinery and probably acts in many cases where coding regions are preceded by complex leaders.
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Affiliation(s)
- T Hohn
- Friedrich Miescher Institute, P.O. Box 2543, CH-4002, Basel, Switzerland
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18
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Jiménez R, López L, Dominguez D, Fariñas H. Difference between observed and predicted length of stay as an indicator of inpatient care inefficiency. Int J Qual Health Care 1999; 11:375-84. [PMID: 10561028 DOI: 10.1093/intqhc/11.5.375] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES To evaluate the performance of the difference between observed and predicted length of stay (OLOS-PLOS) as an inefficiency of care indicator for inpatients. SETTING The Internal Medicine and the General Surgery departments of Hermanos Ameijeiras Hospital in Havana. DESIGN AND STUDY PARTICIPANTS Two sets of clinical histories were needed for each department: one for deriving the predictive equation and another to validate it. The equation was a linear multiple regression model which included variables recognized as affecting length of stay. The validation group of histories was thoroughly examined and separated into two groups: (i) adequate efficiency or mild problems and (ii) inefficiencies considered to be moderate or severe. This classification was the gold standard to obtain a receiver operating characteristic (ROC) curve for the indicator. RESULTS The function explained 41% of the total variation for Internal Medicine and 70% for General Surgery. The indicator's mean difference between the two validation groups of histories was around 10 days for both departments. The areas under the ROC curve were 0.80 for Internal Medicine and 0.88 for General Surgery. Sensitivity and specificity > 0.7 for detecting inefficiencies of care are achieved with a cut off point of 2 days for Internal Medicine and 1 day for General Surgery. CONCLUSIONS The use of predictive equations might be quite useful for detecting efficiency problems in inpatient health care.
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Affiliation(s)
- R Jiménez
- Research Section, Hermanos Ameijeiras Hospital, Havana City, Cuba.
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19
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Dominguez D, Altmann M, Benz J, Baumann U, Trachsel H. Interaction of translation initiation factor eIF4G with eIF4A in the yeast Saccharomyces cerevisiae. J Biol Chem 1999; 274:26720-6. [PMID: 10480875 DOI: 10.1074/jbc.274.38.26720] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [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: 11/06/2022] Open
Abstract
Eukaryotic initiation factor (eIF) 4A is an essential protein that, in conjunction with eIF4B, catalyzes the ATP-dependent melting of RNA secondary structure in the 5'-untranslated region of mRNA during translation initiation. In higher eukaryotes, eIF4A is assumed to be recruited to the mRNA through its interaction with eIF4G. However, the failure to detect this interaction in yeast brought into question the generality of this model. The work presented here demonstrates that yeast eIF4G interacts with eIF4A both in vivo and in vitro. The eIF4A-binding site was mapped to amino acids 542-883 of yeast eIF4G1. Expression in yeast cells of the eIF4G1 domain that binds eIF4A results in cell growth inhibition, and addition of this domain to an eIF4A-dependent in vitro system inhibits translation in a dose-dependent manner. Both in vitro translation and cell growth can be specifically restored by increasing the eIF4A concentration. These data demonstrate that yeast eIF4A and eIF4G interact and suggest that this interaction is required for translation and cell growth.
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Affiliation(s)
- D Dominguez
- Institute for Biochemistry and Molecular Biology, University of Bern, Bühlstrasse 28, 3012 Bern, Switzerland.
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20
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Abstract
It has been proposed that cauliflower mosaic virus 35S RNA with its 600 nt long leader uses an unusual translation process (the translational shunt). A wheat germ in vitro translation assay was used to improve the study of this mechanism. Deletions, the introduction of stable stem-loop structures, and the inhibitory effect of antisense oligonucleotides on gene expression were used to determine the roles of various parts of the leader. It was found that the 5'- and 3'-ends of the leader are absolutely required for translation whereas the middle part is apparently dispensable. These results confirm the data already reported from transient expression experiments with protoplasts. However, the in vitro data suggest in contrast to protoplast experiments that only two relatively short regions at both ends, approximately 100 nt each, are required. The in vitro system provides tools for further studying the shunt model at the molecular level and for examining the involvement of proteins in this mechanism. Shunting was also found to occur with the rice tungro bacilliform virus leader. As wheat is neither a host plant of cauliflower mosaic virus nor rice tungro bacilliform virus, the shunt seems to be host independent, a finding that deviates from earlier studies in protoplasts.
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Affiliation(s)
- W Schmidt-Puchta
- Friedrich Miescher Institute, PO Box 2543, CH-4002 Basel, Switzerland
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21
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Abstract
Local health agencies in Iowa were surveyed to assess the performance of public health practices in their communities. Responses were received from 97 percent of counties. Less than 50 percent of counties were performing half of the indicators of the Assessment function. Policy Development functions also were frequently not performed. Performance was best in the Assurance function, with 86 percent of counties reporting that they inform and educate the public. However, the other three types of Assurance practices (Manage, Implement, and Evaluate) were performed less frequently. Comparison of the performance of Iowa's rural counties reveals a profile nearly identical to that reported elsewhere for a group of six other states.
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Affiliation(s)
- J E Rohrer
- Graduate Program, Hospital and Health Administration, University of Iowa, Iowa City, USA
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22
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Abstract
Unit mergers offer an opportunity for nurses to acquire additional skills. A model for unit mergers is presented. The authors describe how didactic and clinical competencies serve as a foundation upon which the nurse develops proficiency and expertise in a new subspecialty.
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23
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Dominguez E, Badia M, Castedo L, Dominguez D. Improved preparation of 5-hydroxyprotoberberine derivatives via 3-aryltetrahydroisoquinolines. Tetrahedron 1988. [DOI: 10.1016/s0040-4020(01)85107-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Guldner Y, Vieren JP, Voos M, Delahaye F, Dominguez D, Hirtz JP, Razeghi M. Quantum Hall effect in In0.53Ga0.47As-InP heterojunctions with two populated electric subbands. Phys Rev B Condens Matter 1986; 33:3990-3993. [PMID: 9938814 DOI: 10.1103/physrevb.33.3990] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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25
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Ruiz-Maldonado R, Trevizo L, Tamayo L, de los Rios MF, Skurovich M, Carrillo J, Dominguez D, del Castillo V. Progressive cardiomyopathic lentiginosis: report of six cases and one autopsy. Pediatr Dermatol 1983; 1:146-53. [PMID: 6680184 DOI: 10.1111/j.1525-1470.1983.tb01106.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Progressive cardiomyopathic lentiginosis (PCL) is a syndrome with progressive multisystem abnormalities. Lentigines, the cutaneous hallmark, are usually present from early age and are of utmost diagnostic value. Six children with PCL are reported. The most constant diagnostic features in this age group were multiple cutaneous lentigines, structural cardiac anomalies, and electrocardiographic alterations. Less constant findings were neurosensory deafness, short stature, and osseous, ocular, and genitourinary abnormalities.
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26
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Carnevale A, Blanco B, Castillo J, del Castillo V, Dominguez D. Ring chromosome 6 in a child with minimal abnormalities. Am J Med Genet 1979; 4:271-7. [PMID: 517581 DOI: 10.1002/ajmg.1320040310] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We describe a boy with a ring chromosome 6 and short stature, mild micrognathia, and bilateral transitional/simian creases. Five other patients with a ring 6 have been reported. The clinical and cytogenetic observations of all six patients are compared and discussed.
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