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1. Rapid and synchronous response of outlet glaciers to ocean warming on the Barents Sea coast, Novaya Zemlya

Author

Rachel Carr, Zoe Murphy, Peter Nienow, Livia Jakob, and Noel Gourmelen

Subjects
Arctic glaciology, atmosphere/ice/ocean interactions, climate change, ice cap, remote sensing, Environmental sciences, GE1-350, Meteorology. Climatology, QC851-999
Abstract

The Arctic is a hotspot for climate warming, making it crucial to quantify the sea level rise contribution from its ice masses. Novaya Zemlya's ice caps are the largest glacier complex in Europe and are a major contributor to contemporary sea level rise. Here we show that Novaya Zemlya outlet glaciers on the Barents Sea coast respond rapidly and consistently to oceanic forcing at annual timescales, likely due to their exposure to Atlantic Water variability. Glaciers on the Kara Sea show more variable response, likely reflecting their reduced exposure to Atlantic Water. Data demonstrate that the pause in glacier retreat previously observed on Novaya Zemlya between 2013 and 2015 has not persisted and that these changes correspond to ocean temperature variability on the Barents Sea coast. We document a marked shift to warmer air and ocean temperatures, and reduced sea ice concentrations from 2005 onwards. Although we identify ocean warming as the primary trigger for glacier retreat, we suggest that multi-year thinning, driven by the shift towards warmer air temperatures since 2005, pre-conditioned Novaya Zemlya's glaciers to retreat. Despite commonality in the timing of outlet glacier retreat, the magnitude is highly variable during rapid retreat phases, which we attribute to glacier-specific factors.

Published
2024
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2. Testicular degeneration in Huntington disease

Author

Jeremy M. Van Raamsdonk, Zoe Murphy, David M. Selva, Reza Hamidizadeh, Jacqueline Pearson, Ǻsa Petersén, Maria Björkqvist, Cameron Muir, Ian R. Mackenzie, Geoffrey L. Hammond, A. Wayne Vogl, Michael R. Hayden, and Blair R. Leavitt

Subjects
Huntington disease, Huntingtin, Testis, Hypothalamic–pituitary–gonadal axis, Testosterone, YAC128 mouse model, Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571
Abstract

Huntington disease (HD) is an adult onset, neurodegenerative disorder that results from CAG expansion in the HD gene. Recent work has demonstrated testicular degeneration in mouse models of HD and alterations in the hypothalamic–pituitary–gonadal (HPG) axis in HD patients. Here, we show that HD patients have specific testicular pathology with reduced numbers of germ cells and abnormal seminiferous tubule morphology. In the YAC128 mouse model, testicular degeneration develops prior to 12 months of age, but at 12 months, there is no evidence for decreased testosterone levels or loss of GnRH neurons in the hypothalamus. This suggests that testicular pathology results from a direct toxic effect of mutant huntingtin in the testis and is supported by the fact that huntingtin is highly expressed in the affected cell populations in the testis. Understanding the pathogenesis of HD in the testis may reveal common critical pathways which lead to degeneration in both the brain and testis.

Published
2007
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4. Huntingtin expression influences spontaneous seizure disorder susceptibility in FVN/B mice

Author

Jeremy M. Van Raamsdonk, Hilal Al-Shekeli, Laura Wagner, Tim W Bredy, Laura Chan, Jacqueline Pearson, Claudia Schwab, Zoe Murphy, Rebecca S. Devon, Ge Lu, Michael S. Kobor, Michael R. Hayden, and Blair R. Leavitt

Abstract

Huntington disease (HD) is an adult-onset neurodegenerative disorder that is caused by a trinucleotide CAG repeat expansion in the HTT gene that codes for the protein huntingtin (HTT or Htt in mice). HTT is a multi-functional, ubiquitously expressed protein that is essential for embryonic survival, normal neurodevelopment, and adult brain function. The ability of wild-type HTT to protect neurons against various forms of death raises the possibility that loss of normal HTT function may worsen disease progression in HD. Huntingtin-lowering therapeutics are being evaluated in clinical trials for HD, but concerns have been raised that decreasing wild-type HTT levels may have adverse effects. Here we show that Htt levels modulate the occurrence of an idiopathic seizure disorder that spontaneously occurs in FVB/N mice. These abnormal FVB/N mice demonstrate various cardinal features of mouse models of epilepsy including spontaneous seizures, astrocytosis, neuronal hypertrophy, upregulation of brain-derived neurotrophic factor (BDNF), and sudden seizure-related death. Interestingly, decreasing wild-type Htt levels increased the frequency of this disorder, while over-expression of HTT completely prevented it. Examination of the mechanism underlying huntingtin’s ability to modulate the frequency of this seizure disorder indicated that over-expression of full length HTT can promote neuronal survival following seizures. Overall, our results demonstrate a protective role for huntingtin in this form of epilepsy and provide a plausible explanation for the observation of seizures in the juvenile form of HD, Lopes-Maciel-Rodan syndrome, and Wolf-Hirschhorn syndrome. Adverse effects caused by altering huntingtin levels has ramifications related to Huntingtin-lowering therapies in development to treat HD.

Published
2022
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5. Intraoperative positive end-expiratory pressure and postoperative pulmonary complications: a patient-level meta-analysis of three randomised clinical trials

Author

Niklas S. Campos, Thomas Bluth, Sabrine N.T. Hemmes, Julian Librero, Natividad Pozo, Carlos Ferrando, Lorenzo Ball, Guido Mazzinari, Paolo Pelosi, Marcelo Gama de Abreu, Marcus J. Schultz, A. Serpa Neto, Sabrine NT. Hemmes, Paolo Severgnini, Markus W. Hollmann, Jan M. Binnekade, Hermann Wrigge, Jaume Canet, Michael Hiesmayr, Werner Schmid, Edda Tschernko, Samir Jaber, Göran Hedenstierna, Christian Putensen, Agnes Marti, Alessandro Bacuzzi, Alexander Brodhun, Alexandre Molin, Alfred Merten, Ana Parera, Andrea Brunelli, Andrea Cortegiani, Andreas Güldner, Andreas W. Reske, Angelo Gratarola, Antonino Giarratano, Bea Bastin, Bjorn Heyse, Branka Mazul-Sunko, Bruno Amantea, Bruno Barberis, Christopher Uhlig, Conrado Minguez Marín, Cristian Celentano, Daniela La Bella, David D’Antini, David Velghe, Demet Sulemanji, Edoardo De Robertis, Eric Hartmann, Francesca Montalto, Francesco Tropea, Gary H. Mills, Gilda Cinnella, Giorgio Della Rocca, Girolamo Caggianelli, Giulia Pellerano, Giuseppina Mollica, Guillermo Bugedo, Jan-Paul Mulier, Jeroen Vandenbrande, Johann Geib, Jonathan Yaqub, Jorge Florez, Juan F. Mayoral, Juraj Sprung, Jurgen Van Limmen, Lieuwe DJ. Bos, Luc de Baerdemaeker, Luc Jamaer, Luigi Spagnolo, Lydia Strys, Manuel Granell Gil, Marcos F. Vidal Melo, Maria Carmen Unzueta, Maria Victoria Moral, Marion Ferner, Martin Weiss, Massimo Vanoni, Maximilian S. Schaefer, Mercè Prieto, Michele Grio, Peter Markus Spieth, Philipp Simon, Phoebe Bodger, Pilar Sierra, Rita Laufenberg-Feldmann, Roberta Rusca, Rodolfo Proietti, Santi Maurizio Raineri, Santo Caroleo, Sergi Sabaté, Stefan De Hert, Stefano Pezzato, Tanja A. Treschan, Tatjana Goranovic, Thea Koch, Thomas Kiss, Valter Perilli, Virginia Cegarra, Javier Belda, Marina Soro, Carmen Unzueta, Fernando Suarez-Sipmann, Julián Librero, Alicia Llombart, Lucas Rovira, Manuel Granell, César Aldecoa, Oscar Diaz-Cambronero, Jaume Balust, Ignacio Garutti, Rafael Gonzalez, Lucia Gallego, Santiago Garcia del Valle, Javier Redondo, David Pestaña, Aurelio Rodríguez, Javier García, Manuel de la Matta, Maite Ibáñez, Francisco Barrios, Samuel Hernández, Vicente Torres, Salvador Peiró, Abigail Villena, Albert Carramiñana, Alberto Gallego-Casilda, Alejandro Duca, Amalia Alcón, Amanda Miñana, Ana Asensio, Ana Colás, Ana Isabel Galve, Ana Izquierdo, Ana Jurado, Ana María Pérez, Ana Mugarra, Andrea Gutierrez, Ángeles De Miguel, Angels Lozano, Antonio Katime, Antonio Romero, Beatriz Garrigues, Begoña Ayas, Blanca Arocas, Carlos Delgado, Carmen Fernández, Carolina Romero, Clara Gallego, Cristina Garcés, Cristina Lisbona, Cristina Parrilla, Daniel López-Herrera, Domingo González, Eduardo Llamazares, Elena Del Rio, Elena Lozano, Ernesto Pastor, Estefanía Chamorro, Estefanía Gracia, Ester Sánchez, Esther Romero, Fernando Díez, Ferran Serralta, Francisco Daviu, Francisco Sandín, Gerardo Aguilar, Gerardo Tusman, Gonzalo Azparren, Graciela Martínez-Pallí, Inmaculada Benítez, Inmaculada Hernandéz, Inmaculada India, Irene León, Isabel Fuentes, Isabel Ruiz, Jaume Puig, Javie Ignacio Román, Jesús Acosta, Jesús Rico-Feijoo, Jonathan Olmedo, Jose A. Carbonell, Jose M. Alonso, Jose María Pérez, Jose Miguel Marcos, Jose Navarro, Jose Valdivia, Juan Carrizo, Laura Piqueras, Laura Soriano, Laura Vaquero, Lisset Miguel, Lorena Muñoz, Lucia Valencia, Luis Olmedilla, Mᵃ Justina Etulain, Manuel Tisner, María Barrio, María Dolores Alonso, María García, María J. Hernández, María José Alberola, María Parra, María Pilar Argente, María Vila, Mario De Fez, Marta Agilaga, Marta Gine, Mercedes Ayuso, Mercedes García, Natalia Bejarano, Natalia Peña, Nazario Ojeda, Nilda Martínez, Nuria García, Oto Padrón, Pablo García, Paola Valls, Patricia Cruz, Patricia Piñeiro, Pedro Charco, Rafael Anaya, Ramiro López, Rayco Rodríguez, Rocío Martínez, Roger Pujol, Rosa Dosdá, Rosa Lardies, Ruben Díaz, Rubén Villazala, Sara Zapatero, Sergio Cabrera, Sergio Sánchez, Silvia Martin, Suzana Diaz, Tania Franco, Tania Moreno, Tania Socorro, Vicente Gilabert, Victor Balandrón, Victoria Moral, Virgina Cegarra, Viviana Varón, Fernando Abelha, Sühayla Abitağaoğlu, Marc Achilles, Afeez Adebesin, Ine Adriaensens, Charles Ahene, Fatima Akbar, Mohammed Al Harbi, Rita Al Khoury al Kallab, Xavier Albanel, Florence Aldenkortt, Rawan Abdullah Saleh Alfouzan, Reef Alruqaie, Fernando Altermatt, Bruno Luís de Castro Araujo, Genaro Arbesú, Hanna Artsi, Caterina Aurilio, Omer Hilmi Ayanoglu, Harris Baig, Yolanda Baird, Konstantin Balonov, Samantha Banks, Xiaodong Bao, Mélanie Baumgartner, Isabel Belda Tortosa, Alice Bergamaschi, Lars Bergmann, Luca Bigatello, Elena Biosca Pérez, Katja Birr, Elird Bojaxhi, Chiara Bonenti, Iwona Bonney, Elke M.E. Bos, Sara Bowman, Leandro Gobbo Braz, Elisa Brugnoni, Sorin J. Brull, Iole Brunetti, Andrea Bruni, Shonie L. Buenvenida, Cornelius Johannes Busch, Giovanni Camerini, Beatrice Capatti, Javiera Carmona, Jaime Carungcong, Marta Carvalho, Anat Cattan, Carla Cavaleiro, Davide Chiumello, Stefano Ciardo, Mark Coburn, Umberto Colella, Victor Contreras, Pelin Corman Dincer, Elizabeth Cotter, Marcia Crovetto, William Darrah, Simon Davies, Enrique Del Cojo Peces, Ellise Delphin, John Diaper, Paulo do Nascimento Junior, Valerio Donatiello, Jing Dong, Maria do Socorro Dourado, Alexander Dullenkopf, Felix Ebner, Hamed Elgendy, Christoph Ellenberger, Dilek Erdoğan Arı, Thomas Ermert, Fadi Farah, Ana Fernandez-Bustamante, Cristina Ferreira, Marco Fiore, Ana Fonte, Christina Fortià Palahí, Andrea Galimberti, Najia Garofano, Luca Gregorio Giaccari, Fernando Gilsanz, Felix Girrbach, Luca Gobbi, Marc Bernard Godfried, Nicolai Goettel, Peter A. Goldstein, Or Goren, Andrew Gorlin, Juan Graterol, Pierre Guyon, Kevin Haire, Philippe Harou, Antonia Helf, Gunther Hempel, María José Hernández Cádiz, Björn Heyse, Ivan Huercio, Jasmina Ilievska, Lien Jakus, Vijay Jeganath, Yvonne Jelting, Minoa Jung, Barbara Kabon, Aalok Kacha, Maja Karaman Ilić, Arunthevaraja Karuppiah, Ayse Duygu Kavas, Gleicy Keli Barcelos, Todd A. Kellogg, Johann Kemper, Romain Kerbrat, Suraya Khodr, Peter Kienbaum, Bunyamin Kir, Selin Kivrak, Vlasta Klarić, Ceren Köksal, Ana Kowark, Peter Kranke, Bahar Kuvaki, Biljana Kuzmanovska, John Laffey, Mirko Lange, Marília Freitas de Lemos, Marc-Joseph Licker, Manuel López-Baamonde, Antonio López-Hernández, Mercedes Lopez-Martinez, Stéphane Luise, Mark MacGregor, Danielle Magalhães, Julien Maillard, Patrizia Malerbi, Natesan Manimekalai, Michael Margarson, Klaus Markstaller, Archer K. Martin, David P. Martin, Yvette N. Martin, Julia Martínez-Ocon, Ignacio Martin-Loeches, Emilio Maseda, Idit Matot, Niamh McAuliffe, Travis J. McKenzie, Paulina Medina, Melanie Meersch, Angelika Menzen, Els Mertens, Bernd Meurer, Tanja Meyer-Treschan, Changhong Miao, Camilla Micalizzi, Morena Milić, Norma Sueli Pinheiro Módolo, Pierre Moine, Patrick Mölders, Ana Montero-Feijoo, Enrique Moret, Markus K. Muller, Zoe Murphy, Pramod Nalwaya, Filip Naumovski, Paolo Navalesi, Lais Helena Navarro e Lima, Višnja Nesek Adam, Claudia Neumann, Christopher Newell, Zoulfira Nisnevitch, Junaid Nizamuddin, Cecilia Novazzi, Michael O'Connor, Günther Oprea, Mukadder Orhan Sungur, Şule Özbilgin, Maria Caterina Pace, Marcos Pacheco, Balaji Packianathaswamy, Estefania Palma Gonzalez, Fotios Papaspyros, Sebastián Paredes, Maria Beatrice Passavanti, Juan Cristobal Pedemonte, Sanja Peremin, Christoph Philipsenburg, Daniela Pinho, Silvia Pinho, Linda M. Posthuma, Vincenzo Pota, Benedikt Preckel, Paolo Priani, Mohamed Aymen Rached, Aleksandar Radoeshki, Riccardo Ragazzi, Tamilselvan Rajamanickam, Arthi Rajamohan, Harish Ramakrishna, Desikan Rangarajan, Christian Reiterer, J. Ross Renew, Thomas Reynaud, Rhidian Rhys, Eva Rivas, Luisa Robitzky, Rolf Rossaint, Francesca Rubulotta, Humberto S. Machado, Catarina S. Nunes, Giovanni Sabbatini, Jon D. Samuels, Josep Martí Sanahuja, Pasquale Sansone, Alice Santos, Mohamed Sayedalahl, Martin Scharffenberg, Eduardo Schiffer, Nadja Schliewe, Raoul Schorer, Roman Schumann, Gabriele Selmo, Mar Sendra, Mert Senturk, Kate Shaw, Mirjana Shosholcheva, Abdulrazak Sibai, Francesca Simonassi, Claudia Sinno, Nukhet Sivrikoz, Vasiliki Skandalou, Neil Smith, Maria Soares, Tania Socorro Artiles, Diogo Sousa Castro, Miguel Sousa, Savino Spadaro, Emmanouil Stamatakis, Luzius A. Steiner, Andrea Stevenazzi, Alejandro Suarez-de-la-Rica, Mélanie Suppan, Robert Teichmann, José Maria Tena Guerrero, Bram Thiel, Raquel Tolós, Gulbin Tore Altun, Michelle Tucci, Zachary A. Turnbull, Žana Turudić, Matthias Unterberg, Yves Van Nieuwenhove, Julia Van Waesberghe, Marcos Francisco Vidal Melo, Bibiana Vitković, Luigi Vivona, Marcela Vizcaychipi, Carlo Alberto Volta, Anne Weber, Toby N. Weingarten, Jakob Wittenstein, Piet Wyffels, Julio Yagüe, David Yates, Ayşen Yavru, Lilach Zac, Jing Zhong, Anesthesiology, Intensive Care Medicine, ACS - Pulmonary hypertension & thrombosis, ACS - Diabetes & metabolism, ACS - Microcirculation, Campos, Niklas S, Bluth, Thoma, Hemmes, Sabrine N T, Librero, Julian, Pozo, Natividad, Ferrando, Carlo, Ball, Lorenzo, Mazzinari, Guido, Pelosi, Paolo, Gama de Abreu, Marcelo, Schultz, Marcus J, Serpa Neto, A, investigators for the PROVHILO study including, Cortegiani, Andrea, Raineri, Santi Maurizio, and Giarratano, Antonino

Subjects
Adult, Lung Diseases, PEEP, postoperative pulmonary complications, mechanical ventilation, Positive-Pressure Respiration, surgery, Anesthesiology and Pain Medicine, Postoperative Complications, Tidal Volume, Humans, Postoperative Period, Lung, Randomized Controlled Trials as Topic
Abstract

BACKGROUND: High intraoperative PEEP with recruitment manoeuvres may improve perioperative outcomes. We re-examined this question by conducting a patient-level meta-analysis of three clinical trials in adult patients at increased risk for postoperative pulmonary complications who underwent non-cardiothoracic and non-neurological surgery. METHODS: The three trials enrolled patients at 128 hospitals in 24 countries from February 2011 to February 2018. All patients received volume-controlled ventilation with low tidal volume. Analyses were performed using one-stage, two-level, mixed modelling (site as a random effect; trial as a fixed effect). The primary outcome was a composite of postoperative pulmonary complications within the first week, analysed using mixed-effect logistic regression. Pre-specified subgroup analyses of nine patient characteristics and seven procedure and care-delivery characteristics were also performed. RESULTS: Complete datasets were available for 1913 participants ventilated with high PEEP and recruitment manoeuvres, compared with 1924 participants who received low PEEP. The primary outcome occurred in 562/1913 (29.4%) participants randomised to high PEEP, compared with 620/1924 (32.2%) participants randomised to low PEEP (unadjusted odds ratio [OR]=0.87; 95% confidence interval [95% CI], 0.75-1.01; P=0.06). Higher PEEP resulted in 87/1913 (4.5%) participants requiring interventions for desaturation, compared with 216/1924 (11.2%) participants randomised to low PEEP (OR=0.34; 95% CI, 0.26-0.45). Intraoperative hypotension was associated more frequently (784/1913 [41.0%]) with high PEEP, compared with low PEEP (579/1924 [30.1%]; OR=1.87; 95% CI, 1.60-2.17). CONCLUSIONS: High PEEP combined with recruitment manoeuvres during low tidal volume ventilation in patients undergoing major surgery did not reduce postoperative pulmonary complications. CLINICAL TRIAL REGISTRATION: NCT03937375 (Clinicaltrials.gov).

Published
2022

6. Testicular degeneration in Huntington disease

Author

A. Wayne Vogl, Jeremy M. Van Raamsdonk, Maria Björkqvist, Cameron Muir, Blair R. Leavitt, David M. Selva, Reza Hamidizadeh, Zoe Murphy, Geoffrey L. Hammond, Michael R. Hayden, Åsa Petersén, Jacqueline Pearson, and Ian R. A. Mackenzie

Subjects
Adult, Male, medicine.medical_specialty, Hypothalamo-Hypophyseal System, endocrine system, Huntingtin, Hypothalamic–pituitary–gonadal axis, Mice, Transgenic, Nerve Tissue Proteins, YAC128 mouse model, Degeneration (medical), Biology, Testicular Diseases, lcsh:RC321-571, Pathogenesis, Gonadotropin-Releasing Hormone, Mice, Internal medicine, Testis, Huntingtin Protein, medicine, Animals, Humans, Testosterone, lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry, Aged, Neurons, Nuclear Proteins, Middle Aged, Seminiferous Tubules, Huntington disease, Disease Models, Animal, Seminiferous tubule, medicine.anatomical_structure, Endocrinology, Germ Cells, Neurology, Hypothalamus
Abstract

Huntington disease (HD) is an adult onset, neurodegenerative disorder that results from CAG expansion in the HD gene. Recent work has demonstrated testicular degeneration in mouse models of HD and alterations in the hypothalamic-pituitary-gonadal (HPG) axis in HD patients. Here, we show that HD patients have specific testicular pathology with reduced numbers of germ cells and abnormal seminiferous tubule morphology. In the YAC128 mouse model, testicular degeneration develops prior to 12 months of age, but at 12 months, there is no evidence for decreased testosterone levels or loss of GnRH neurons in the hypothalamus. This suggests that testicular pathology results from a direct toxic effect of mutant huntingtin in the testis and is supported by the fact that huntingtin is highly expressed in the affected cell populations in the testis. Understanding the pathogenesis of HD in the testis may reveal common critical pathways which lead to degeneration in both the brain and testis.

Published
2007

7. Cleavage at the Caspase-6 Site Is Required for Neuronal Dysfunction and Degeneration Due to Mutant Huntingtin

Author

Zoe Murphy, Elizabeth J. Slow, Lisa Bertram, Blair R. Leavitt, Nagat Bissada, Lynn A. Raymond, Ge Lu, Simon C. Warby, Brendan Haigh, Michael R. Hayden, Rona K. Graham, Donald W. Nicholson, Yu Deng, Jacqueline Pearson, Cheryl L. Wellington, Jacqueline Shehadeh, Sophie Roy, and Crystal N. Doty

Subjects
Huntingtin, animal diseases, Excitotoxicity, medicine.disease_cause, Mice, chemistry.chemical_compound, 0302 clinical medicine, Staurosporine, Caspase, Neurons, Huntingtin Protein, 0303 health sciences, Caspase 6, biology, Hydrolysis, Neurodegeneration, Brain, Nuclear Proteins, Cell biology, Huntington Disease, Biochemistry, Caspases, medicine.drug, congenital, hereditary, and neonatal diseases and abnormalities, N-Methylaspartate, Active Transport, Cell Nucleus, Mice, Transgenic, Nerve Tissue Proteins, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, mental disorders, medicine, Animals, Humans, 030304 developmental biology, Cell Nucleus, Biochemistry, Genetics and Molecular Biology(all), Quinolinic Acid, medicine.disease, nervous system diseases, nervous system, chemistry, Mutation, Nerve Degeneration, biology.protein, 030217 neurology & neurosurgery, Quinolinic acid
Abstract

SummaryCleavage of huntingtin (htt) has been characterized in vitro, and accumulation of caspase cleavage fragments represents an early pathological change in brains of Huntington's disease (HD) patients. However, the relationship between htt proteolysis and the pathogenesis of HD is unknown. To determine whether caspase cleavage of htt is a key event in the neuronal dysfunction and selective neurodegeneration in HD, we generated YAC mice expressing caspase-3- and caspase-6-resistant mutant htt. Mice expressing mutant htt, resistant to cleavage by caspase-6 but not caspase-3, maintain normal neuronal function and do not develop striatal neurodegeneration. Furthermore, caspase-6-resistant mutant htt mice are protected against neurotoxicity induced by multiple stressors including NMDA, quinolinic acid (QA), and staurosporine. These results are consistent with proteolysis of htt at the caspase-6 cleavage site being an important event in mediating neuronal dysfunction and neurodegeneration and highlight the significant role of htt proteolysis and excitotoxicity in HD.

Published
2006
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8. Selective degeneration and nuclear localization of mutant huntingtin in the YAC128 mouse model of Huntington disease

Author

Jeremy M. Van Raamsdonk, Blair R. Leavitt, Elizabeth J. Slow, Michael R. Hayden, and Zoe Murphy

Subjects
medicine.medical_specialty, Cerebellum, Huntingtin, Hippocampus, Mice, Transgenic, Nerve Tissue Proteins, Striatum, Biology, Mice, Huntington's disease, Internal medicine, Genetics, medicine, Huntingtin Protein, Animals, Humans, Promoter Regions, Genetic, Molecular Biology, Genetics (clinical), Cell Nucleus, Cerebral Cortex, Brain, Nuclear Proteins, General Medicine, Anatomy, medicine.disease, nervous system diseases, Disease Models, Animal, Huntington Disease, Endocrinology, medicine.anatomical_structure, Globus pallidus, Gene Expression Regulation, nervous system, Cerebral cortex, Mutation, Atrophy
Abstract

Huntington disease (HD) is an adult onset neurodegenerative disorder that predominantly affects the striatum and cortex despite ubiquitous expression of mutant huntingtin (htt). Here we demonstrate that this pattern of selective degeneration is present in the YAC128 mouse model of HD. At 12 months, YAC128 mice show significant atrophy in the striatum, globus pallidus and cortex with relative sparing of the hippocampus and cerebellum (striatum: -10.4%, P

Published
2005
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10. Wild-type huntingtin ameliorates striatal neuronal atrophy but does not prevent other abnormalities in the YAC128 mouse model of Huntington disease

Author

Zoe Murphy, Jacqueline Pearson, Blair R. Leavitt, Jeremy M. Van Raamsdonk, and Michael R. Hayden

Subjects
Dopamine and cAMP-Regulated Phosphoprotein 32, congenital, hereditary, and neonatal diseases and abnormalities, medicine.medical_specialty, Huntingtin, Transgene, Cell Count, Mice, Transgenic, Nerve Tissue Proteins, Biology, Neuroprotection, Rotarod performance test, lcsh:RC321-571, Mice, Mice, Neurologic Mutants, 03 medical and health sciences, Cellular and Molecular Neuroscience, 0302 clinical medicine, Atrophy, Internal medicine, mental disorders, medicine, Huntingtin Protein, Animals, Nuclear protein, lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry, Cell Size, 030304 developmental biology, Neurons, Analysis of Variance, 0303 health sciences, General Neuroscience, lcsh:QP351-495, Wild type, Nuclear Proteins, medicine.disease, nervous system diseases, Neostriatum, Disease Models, Animal, Huntington Disease, lcsh:Neurophysiology and neuropsychology, Endocrinology, nervous system, Motor Skills, Rotarod Performance Test, Neuroscience, 030217 neurology & neurosurgery, Research Article
Abstract

Background Huntington disease (HD) is an adult onset neurodegenerative disorder caused by a polyglutamine expansion in the huntingtin (htt) protein. Htt function is essential for embryonic survival as well as normal function during the postnatal period. In addition to having roles in transcription and transport, recent evidence demonstrates that wild-type htt is neuroprotective in vivo. To determine whether treatment with wild-type htt would be beneficial in HD, we crossed the YAC128 mouse model of HD with mice that over-express wild-type htt (YAC18 mice) to generate YAC128 mice that over-express wild-type htt (YAC18/128 mice). Results YAC18/128 mice were found to express mutant htt at the same level as YAC128 mice and wild-type htt at the same level as YAC18 mice. YAC18/128 mice show no significant behavioural improvement compared to YAC128 mice in the rotarod test of motor coordination or in an automated open field test. In the brain, YAC18/128 mice show no significant improvement in striatal volume, striatal neuronal numbers or striatal DARPP-32 expression compared to YAC128 mice. In contrast, striatal neuronal cross-sectional area showed significant improvement in YAC18/128 mice compared to YAC128 mice. Conclusion While the over-expression of wild-type htt results in a mild improvement in striatal neuropathology in YAC128 mice, our findings suggest that treatment with wild-type htt may not be sufficient to ameliorate the symptoms of HD in this model.

Published
2006
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11. Body weight is modulated by levels of full-length huntingtin

Author

Ge Lu, Michael R. Hayden, Jeremy M. Van Raamsdonk, Blair R. Leavitt, William T. Gibson, Jacqueline Pearson, and Zoe Murphy

Subjects
Male, congenital, hereditary, and neonatal diseases and abnormalities, medicine.medical_specialty, Huntingtin, Mutant, Spleen, Mice, Inbred Strains, Nerve Tissue Proteins, Biology, Kidney, Eating, Mice, Weight loss, Internal medicine, mental disorders, Genetics, medicine, Animals, Molecular Biology, Genetics (clinical), Huntingtin Protein, Body Weight, Nuclear Proteins, General Medicine, Organ Size, Polyglutamine tract, Phenotype, nervous system diseases, Disease Models, Animal, medicine.anatomical_structure, Endocrinology, nervous system, Biochemistry, Gene Expression Regulation, Mutation, Female, medicine.symptom, Weight gain
Abstract

Huntington disease is an adult-onset neurodegenerative disorder that is caused by the expansion of a polyglutamine tract within the Huntingtin (htt) protein. Wild-type htt has been shown to be involved in transcription, transport and cell survival. Here, we demonstrate that increased expression of full-length wild-type htt in mice is associated with a dose-dependent increase in body weight which results from an increase in both total fat mass and fat-free mass. Conversely, we show that a reduction in the levels of wild-type htt is associated with decreased body weight. Examination of individual organ weights revealed that the weight of the heart, liver, kidneys, lungs and spleen increased with the over-expression of wild-type htt, whereas the brain and testis were unaltered. On the basis of these initial findings, we examined mice that over-express full-length mutant htt to determine the effect of polyglutamine expansion on this novel function of wild-type htt. We found that over-expression of full-length mutant htt, but not an N-terminal fragment of mutant htt, also increased body weight and organ weight, except in the brain and testis where mutant htt appears to be toxic. In these mice, the majority of weight gain could be accounted for by increases in total fat mass. Further investigation of the weight gain phenotype revealed that the increases in weight were not accounted for by increased food consumption relative to body weight. Overall, we demonstrate that increased levels of both wild-type and mutant full-length htt are associated with increased body weight.

Published
2006

12. Wild-type huntingtin protects neurons from excitotoxicity

Author

Cheryl L. Wellington, Lynn A. Raymond, Jacqueline Shehadeh, Jeremy M. Van Raamsdonk, Herman B. Fernandes, Zoe Murphy, Blair R. Leavitt, Michael R. Hayden, and Rona K. Graham

Subjects
congenital, hereditary, and neonatal diseases and abnormalities, Huntingtin, N-Methylaspartate, Neurotoxins, Excitotoxicity, Apoptosis, Mice, Transgenic, Nerve Tissue Proteins, Biology, medicine.disease_cause, Biochemistry, Neuroprotection, Cellular and Molecular Neuroscience, chemistry.chemical_compound, Mice, Caffeine, mental disorders, medicine, Huntingtin Protein, Animals, Humans, Chromosomes, Artificial, Yeast, Neurons, Caspase 3, Neurodegeneration, Glutamate receptor, Nuclear Proteins, medicine.disease, Staurosporine, Recombinant Proteins, nervous system diseases, medicine.anatomical_structure, nervous system, chemistry, Caspases, Neuron, Neuroscience, Quinolinic acid
Abstract

Huntingtin is a caspase substrate, and loss of normal huntingtin function resulting from caspase-mediated proteolysis may play a role in the pathogenesis of Huntington disease. Here we tested the hypothesis that increasing huntingtin levels protect striatal neurons from NMDA receptor-mediated excitotoxicity. Cultured striatal neurons from yeast artificial chromosome (YAC)18 transgenic mice over-expressing full-length wild-type huntingtin were dramatically protected from apoptosis and caspase-3 activation compared with cultured striatal neurons from non-transgenic FVB/N littermates and YAC72 mice expressing mutant human huntingtin. NMDA receptor activation induced by intrastriatal injection of quinolinic acid initiated a form of apoptotic neurodegeneration within the striatum of mice that was associated with caspase-3 cleavage of huntingtin in neurons and astrocytes, decreased levels of full-length huntingtin, and the generation of a specific N-terminal caspase cleavage product of huntingtin. In vivo, over-expression of wild-type huntingtin in YAC18 transgenic mice conferred significant protection against NMDA receptor-mediated apoptotic neurodegeneration. These data provide in vitro and in vivo evidence that huntingtin may regulate the balance between neuronal survival and death following acute excitotoxic stress, and that the levels of huntingtin may modulate neuronal sensitivity to excitotoxic neurodegeneration. We suggest that further study of huntingtin's anti-apoptotic function will contribute to our understanding of the pathogenesis of Huntingdon's disease and provide insights into the selective vulnerability of striatal neurons to excitotoxic cell death.

Published
2006

13. Postoperative continuous positive airway pressure to prevent pneumonia, re-intubation, and death after major abdominal surgery (PRISM): a multicentre, open-label, randomised, phase 3 trial

Author

Rupert Pearse, Marco Ranieri, Tom Abbott, Mari-Liis Pakats, Edoardo Piervincenzi, Akshaykumar Patel, Brennan Kahan, Andrew Rhodes, Priyanthi Dias, Russell Hewson, Ib Jammer, Michelle Chew, Cesar Aldecoa, Reitze Rodseth, Bruce Biccard, Tim Stephens, Sara Payne, David Hepworth, Soeren Pischke, Joerund Asvall, John Hausken, Shaman Jhanji, Martin Rooms, Neil Flint, Dawn Hales, Tamas Szakmany, Andrew Leitch, Savino Spadaro, Davide Chiumello, Paul Johnston, Joyce Yeung, Guglielmo Tellan, Tonny Veenith, Josep Macmillan, Pierpaolo Terragni, Caroline Sander, Vidya Kasipandian, Tahania Ahmad, Aaron Lee, Marcello Tammaro, Danny McAuley, Simon Skene, Ravinder Vohra, Matt Wilson, Mark Edwards, Ewen Griffiths, Naomi Pritchard, Claudia Filippini, Tor Aasmundstad, Einar Aksnes, Lise-Merete Alpers, Andreas Barratt-Due, Anita Dahl, Linda Feldt, Elisa Figari, Eva Flåten, Karen Granheim, Minna Hagring, Håkon Haugaa, Gisle Kjoesen, Inge Klaevahaugen, Harald Lenz, Marianne Myhre, Hilde Orrem, Emily Stitt, Tor Inge Toennessen, Samuel Al-Kadhimi, Robert Anker, Mihaela Balint, Lauren Barraclough, Ethel Black, Matt Clayton, Leonora Conneely, Zara Edwards, Alex Eeles, Matthew Evans, Michelle Gerstman, Nicole Greenshields, Eleanor Harvey, Aoife Hegarty, Natalie Hester, Jenna Hutchinson, Ramanathan Kasivisvanathan, Helen Lawrence, Veronica Marsh, Laura Matthews, Francesca Mazzola, Jamie McCanny, Ben Morrison, Michelle O'Mahony, Ching Ling Pang, David Parkinson, Katrina Pirie, Ravishankar Rao Baikady, Louisa Shovel, Lorna Smith, Kate Tatham, Peter Thomas, Sophie Uren, Susanna Walker, Alasdair Wills, Prematie Andreou, Alex Howson, Jasmin Kaur, Adam Lewszuk, Esther Molina, Nirmalabaye Ramsamy, Emma Roberts, Vanessa Amaral, Salma Begum, Soliana Bekele, Richard Cashmore, Carmen Correia, Steven Dunkley, Maria Fernandez, Alexander Fowler, Amaia Garcia, Maria Della Giovampaola, Kathryn Greaves, Bethan Griffiths, Ryan Haines, Richard Haslop, Ying Hu, Sarah Hui, Marta Januszewska, Vasi Manon, Tim Martin, Shaun May, Annamaria Minicozzi, Edyta Niebrzegowska, Monica Oliveira, Katherine Pates, Filipa Santos, Tasnin Shahid, Paolo Simili, Alastair Somerville, Emily Subhedar, Ruzena Uddin, Sophie Walker, Yize Wan, Jan Whalley, Parjam Zolfaghari, Una Gunter, Gemma Hodkinson, Gwenllian Howe, Valentina Baratozzi, Giulia Casotto, Giulia Darai, Erica Ferrari, Giovanni Mistraletti, Valentina Palmaverdi, Stefano Furlani, Paolo Priani, Riccardo Ragazzi, Marco Salmaso, Marco Verri, Carlo Volta, Chris Nutt, Emma McKay, Orla O'Neill, Jaimin Patel, Katie Atterbury, Sarah Ballinger, Natalie Carling, Kaytie Ellis, Jo Gresty, Teresa Melody, Jade Monk, Chloe Norman, Eleanor Reeves, Julia Sampson, Peter Sutton, Marie Thomas, Amy Bamford, Colin Bergin, Ronald Carrera, Lauren Cooper, Liesl Despy, Karen Ellis, Emma Fellows, Stephanie Goundry, Samantha Harkett, Peter Ip, Tracy Mason, Christopher McGhee, Aisling McLaughlin, Aoife Neal, Martin Pope, Stephanie Porter, Hazel Smith, Catherine Snelson, Elaine Spruce, Ylenia Vigo, Arlo Whitehouse, Tony Whitehouse, Maria Donatiello, Sergio Gazzanelli, Mario Mezzapesa, Martina Savino, Giacomo Settesoldi, Gudrun Kunst, Sian Birch, Louise Greig, Harriet Noble, Evita Pappa, Bethany Penhaligon, Andrea Cossu, Leda Floris, Davide Piredda, Alberto Racca, Olof Brattstrom, Bente Heggelund, Magnus Flodberg, Sandra Månsson, Mamoona Ahmed, Jonathan Allen, Paula Bell, Roman Genetu, Julia Glennon, Janice Hanley, Katy Jenner, Summayyah Jogi, Parisa Mahjoob, Clare McGovern, Anthony Murphy, Roonak Nazari, Jacki Routledge, Trishna Uttamlal, Sinead Ward, Giorgio Iotti, Raffaella Picchioni, Silvia Poma, Paolo Navalesi, Andrea Bruni, Brunella De Leonardis, Eugenio Garofalo, Panna Patel, Carol McArthur, Karen Burns, Steven Peters, Giuseppe Foti, Serena Calcinati, Alice Grassi, Silvia Villa, John Berridge, Muthuraj Kanakaraj, Hazel Cahill, Greg Forshaw, Andy Gibson, Lia Grainger, Kate Howard, Katherine James, Zoe Murphy, Helen Sweeting, Rebecca Tait, Danielle Wilcock, David Yates, Sean Cope, Ashley Allan, Rebecca Betts, Sarah Cornell, Julie Sheriff, Lindsey Woods, Giacomo Grasselli, Matteo Brioni, Luigi Castagna, Richard von Rahden, Zane Farina, Samantha Green, Simphiwe Gumede, Chantal Rajah, Arisha Ramkillawan, Susan Moug, David Alcorn, Carol Dalton, Natalie Dickinson, Jennifer Edwards, Steven Henderson, Erin McIlveen, Richard Ramsaran, Joanne Bell, Lorna Fleming, Kathleen Monks, Jane Parker, Sean Stamper, Jo Stokes-Denson, Elisa Elías, Yessica Guerra, Jesus Rico-Feijoo, Carlos Kidel, Helder Filipe, Gretchelle Asis, Yvonne Gleeson, Alice Harvey, Christine Jackson, Margaret McNeil, Sara Mingo, Glykeria Pakou, Manuel Pinto, Stephen Wright, Maite Babio-Galan, David Buckley, Verity Calder, Ahmad Chishti, Joseph Cosgrove, Katherine Cullen, Leigh Dunn, Matthew Faulds, Jonathan Fortune, Matthew Gardner, Abigail Harrison, Carole Hays, Gerry Jones, Caroline Macfie, Iain Mccullagh, Ian Nesbitt, Suzanne O'Neil, Catherine Phoenix, Girish Rangaswamy, Craig Samson, Carmen Scott, Tara Shrestha, Rita Singh, Graham Soulsby, Jon Walton, Kimberley Zwiggelaar, Ceri Lynch, Heidi Clarke, Bethan Deacon, Helen Ivatt, Leanne Jones, Ahmed Latif, Shaun Oram, Chris Perman, Lisa Roche, Rowan Duys, Margot Flint, Kamal Bhagwan, Ettienne Coetzee, Ivan Joubert, Felipe Montoya-Pelaez, Pradeep Navsaria, Guy Picken, Owen Porrill, Grant Strathie, Thembinkosi Zungu, Sireesha Aluri, Simon Chau, Deborah Cooper, Mishell Cunningham, Allison Daniels, Susan Hope, Alice Nicholson, Laura Walker, Antonino Giarratano, Giuseppe Accurso, Santi Raineri, Giuseppe Tricoli, Richard Innes, Patricia Doble, Joanne Hutter, Corinne Pawley, Moira Tait, Mark Hamilton, Edward Andrade, Veronica Barnes, Claire Dalton, Carlos Delgado, Sarah Farnell-Ward, Helen Farrah, Geraldine Gray, Luisa Howlett, Gipsy Joseph, Monika Krupa, Susannah Leaver, Joao Macedo, Karen Maher, Johannes Mellinghoff, Rachel Oguntimehin, Joel Pereira, Frances Robinson, Christine Ryan, Nirav Shah, Paula Shirley, Alexandra Torborg, Thuli Biyase, Leanne Drummond, Belinda Kusel, Mbalenhle Mbuyisa, Sivuyisiwe Solala, Jenna Taylor, Adanma Ezihe-Ejiofor, Maame Aduse-Poku, Gary Colville, Louise Davies, Soo Kang, Alex Phillips, Justin Kirk-Bayley, Leigh Kelliher, Paula Carvelli, Gokce Daysal, Matthew Dickinson, Nancileigh Doyle, Christina Hughes, Laura Montague, Elizabeth Potter, Armorel Salberg, Sheena Sibug, Sinduja Sivarajan, Milo Thomson, Nichola Wakeford, Monica Rocco, Daniela Alampi, Daniel Conway, Richard Clark, Jashmin Maria, Fiona Pomeroy, Tanviha Quraishi, Abigail Williams, Srikanth Chukkambotla, Caroline Aherne, Donna Harrison-Briggs, Jill Fitchett, Stephen Duberley, Andrea Zanoni, Daniela Cardinale, Claudia Righi, Mark Blunt, Tracy Fuller, Ruth Hodgson, Melissa Rosbergen, Andrew Brennan, Louise Akeroyd, Victoria Boardman, Christopher Bull, Mike Carrick, Ian Chadderton, Sarah Cooper, Sarah Goellner, Laura Graham, Carl Ilyas, James King, Muhammad Laklouk, Tom Lawton, Christopher Macrow, Michael Munro, Adam Neep, Martin Northey, Victoria Peacock, Kate Pye, Lydia Radley, James Sira, Beth Smithson, Stuart Syddall, David Tooth, Thomas White, Sindre Hoel, Elin Aakre, Monica Bakke, Tone Hoivik, Arystarch Makowski, Harry Alcock, Sean Cardoso, Samantha Coetzee, Mary Everett, Mohamed Ibrahim, Christina Kouridaki, Vongayi Ogbeide, Elisabetta Bertellini, Valentina Bertolotti, Antonio Buono, Maria Fanigliulo, Ram Kumar, Nicole Richards, Alisha Allana, Samantha Bacciarelli, Helen Barker, Jessica De Bois, Isabel Bradley, Jennifer Crooks, Peter Daum, Alex Feben, Lizzie Gannon, Sarah Kipling, Andrew Peetamsingh, Charlotte Quamina, Sahiba Sethi, Harry Sivadhas, Kathryn Sollesta, Andrew Swain, Evalyn Tan, Joan Willis, Maggie Zou, Julius Cranshaw, Nina Barratt, Katie Bowman, Debbie Branney, Maria Letts, Sally Pitts, Christopher Day, Sarah Benyon, Sara Eddy, Adam Green, Anna Grice, Sinéad Kelly, Daisy Mackle, Victor Mariano, Linda Park, Pauline Sibley, William Spencer, Elena Bignami, Valentina Bellini, Francesco Forfori, Maria Curci, Alessandra Leo, Matthew Jackson, Jennifer Awolesi, Sheila Hodgkinson, Alissa Kent, Dee Leonard, Claire Stapleton, Clare Tibke, Farhad Alexander-Sefre, Lorraine Campey, Kathryn Hall, Jennifer Spimpolo, Malin Nilsson, Helen Didriksson, Emma Hamilton, Mandy Carnahan, Chris Mowatt, Jo Stickley, Antonio Corcione, Giuseppe Rossi, Hege Fladby, Nina Andersen, Gunhild Bjoernå, Mads Reite, Linda Roertveit, Philipp Seidel, Glenn Arnold, Melissa Benavente, Anjalee Chattersingh, Nyasha Chironga, Gillian Hornzee, Joyce Kibaru, Ihtisham Malik, Laura McLeavy, Byiravey Pathmanathan, Florence Prior, Rhea Strudwick, Marios Vezyrgiannis, Aneeta Sinha, Sheeba Babu, Bisanth Batuwitage, Zoe Daly, Katharine Ellinor, Elizabeth Hawes, Ann Holmes, Karen Hudson, Jeremy Nightingale, Alison Le Poidevin, Lindsey Roberts, Agnieszka Kubisz-Pudelko, Joanna Allison, Lucy Pippard, Vincent Hamlyn, Angie Organ, Thaventhran Prabhahar, Hayley Bridger, Lee Dvorkin, Vitul Manhas, Rachel Vincent, Shondipon Laha, Terri-Louise Cromie, Donna Doyle, Rachel Howarth, Mark Verlander, Ailsa Watt, Alexandra Williams, Massimo Antonelli, Salvatore Cutuli, Luca Montini, Juan Graterol, Benita Adams, Sarah Bean, Karen Burt, Fiona Hammonds, Suyogi Jigajinni, Laura Fulton, Stephen Kinghorn, Jost Mullenheim, Kirsty Baillie, Martyn Cain, Kerry Colling, Carol Hannaway, Ruggero Corso, Morena Calli, Carlos Ferrando, Esther Romero, Pablo Jorge-Monjas, María Soria-García, José Gómez-Herreras, Rita Rodríguez-Jiménez, Blanca De Prada-Martín, Pearse, Rupert, Ranieri, Marco, Abbott, Tom, Pakats, Mari-Lii, Piervincenzi, Edoardo, Patel, Akshaykumar, Kahan, Brennan, Rhodes, Andrew, Dias, Priyanthi, Hewson, Russell, Jammer, Ib, Chew, Michelle, Aldecoa, Cesar, Rodseth, Reitze, Biccard, Bruce, Stephens, Tim, Payne, Sara, Hepworth, David, Pischke, Soeren, Asvall, Joerund, Hausken, John, Jhanji, Shaman, Rooms, Martin, Flint, Neil, Hales, Dawn, Szakmany, Tama, Leitch, Andrew, Spadaro, Savino, Chiumello, Davide, Johnston, Paul, Yeung, Joyce, Tellan, Guglielmo, Veenith, Tonny, Macmillan, Josep, Terragni, Pierpaolo, Sander, Caroline, Kasipandian, Vidya, Ahmad, Tahania, Lee, Aaron, Tammaro, Marcello, McAuley, Danny, Skene, Simon, Vohra, Ravinder, Wilson, Matt, Edwards, Mark, Griffiths, Ewen, Pritchard, Naomi, Filippini, Claudia, Aasmundstad, Tor, Aksnes, Einar, Alpers, Lise-Merete, Barratt-Due, Andrea, Dahl, Anita, Feldt, Linda, Figari, Elisa, Flåten, Eva, Granheim, Karen, Hagring, Minna, Haugaa, Håkon, Kjoesen, Gisle, Klaevahaugen, Inge, Lenz, Harald, Myhre, Marianne, Orrem, Hilde, Stitt, Emily, Toennessen, Tor Inge, Al-Kadhimi, Samuel, Anker, Robert, Balint, Mihaela, Barraclough, Lauren, Black, Ethel, Clayton, Matt, Conneely, Leonora, Edwards, Zara, Eeles, Alex, Evans, Matthew, Gerstman, Michelle, Greenshields, Nicole, Harvey, Eleanor, Hegarty, Aoife, Hester, Natalie, Hutchinson, Jenna, Kasivisvanathan, Ramanathan, Lawrence, Helen, Marsh, Veronica, Matthews, Laura, Mazzola, Francesca, McCanny, Jamie, Morrison, Ben, O'Mahony, Michelle, Pang, Ching Ling, Parkinson, David, Pirie, Katrina, Rao Baikady, Ravishankar, Shovel, Louisa, Smith, Lorna, Tatham, Kate, Thomas, Peter, Uren, Sophie, Walker, Susanna, Wills, Alasdair, Andreou, Prematie, Howson, Alex, Kaur, Jasmin, Lewszuk, Adam, Molina, Esther, Ramsamy, Nirmalabaye, Roberts, Emma, Amaral, Vanessa, Begum, Salma, Bekele, Soliana, Cashmore, Richard, Correia, Carmen, Dunkley, Steven, Fernandez, Maria, Fowler, Alexander, Garcia, Amaia, Della Giovampaola, Maria, Greaves, Kathryn, Griffiths, Bethan, Haines, Ryan, Haslop, Richard, Hu, Ying, Hui, Sarah, Januszewska, Marta, Manon, Vasi, Martin, Tim, May, Shaun, Minicozzi, Annamaria, Niebrzegowska, Edyta, Oliveira, Monica, Pates, Katherine, Santos, Filipa, Shahid, Tasnin, Simili, Paolo, Somerville, Alastair, Subhedar, Emily, Uddin, Ruzena, Walker, Sophie, Wan, Yize, Whalley, Jan, Zolfaghari, Parjam, Gunter, Una, Hodkinson, Gemma, Howe, Gwenllian, Baratozzi, Valentina, Casotto, Giulia, Darai, Giulia, Ferrari, Erica, Mistraletti, Giovanni, Palmaverdi, Valentina, Furlani, Stefano, Priani, Paolo, Ragazzi, Riccardo, Salmaso, Marco, Verri, Marco, Volta, Carlo, Nutt, Chri, McKay, Emma, O'Neill, Orla, Patel, Jaimin, Atterbury, Katie, Ballinger, Sarah, Carling, Natalie, Ellis, Kaytie, Gresty, Jo, Melody, Teresa, Monk, Jade, Norman, Chloe, Reeves, Eleanor, Sampson, Julia, Sutton, Peter, Thomas, Marie, Bamford, Amy, Bergin, Colin, Carrera, Ronald, Cooper, Lauren, Despy, Liesl, Ellis, Karen, Fellows, Emma, Goundry, Stephanie, Harkett, Samantha, Ip, Peter, Mason, Tracy, McGhee, Christopher, McLaughlin, Aisling, Neal, Aoife, Pope, Martin, Porter, Stephanie, Smith, Hazel, Snelson, Catherine, Spruce, Elaine, Vigo, Ylenia, Whitehouse, Arlo, Whitehouse, Tony, Donatiello, Maria, Gazzanelli, Sergio, Mezzapesa, Mario, Savino, Martina, Settesoldi, Giacomo, Kunst, Gudrun, Birch, Sian, Greig, Louise, Noble, Harriet, Pappa, Evita, Penhaligon, Bethany, Cossu, Andrea, Floris, Leda, Piredda, Davide, Racca, Alberto, Brattstrom, Olof, Heggelund, Bente, Flodberg, Magnu, Månsson, Sandra, Ahmed, Mamoona, Allen, Jonathan, Bell, Paula, Genetu, Roman, Glennon, Julia, Hanley, Janice, Jenner, Katy, Jogi, Summayyah, Mahjoob, Parisa, McGovern, Clare, Murphy, Anthony, Nazari, Roonak, Routledge, Jacki, Uttamlal, Trishna, Ward, Sinead, Iotti, Giorgio, Picchioni, Raffaella, Poma, Silvia, Navalesi, Paolo, Bruni, Andrea, De Leonardis, Brunella, Garofalo, Eugenio, Patel, Panna, McArthur, Carol, Burns, Karen, Peters, Steven, Foti, Giuseppe, Calcinati, Serena, Grassi, Alice, Villa, Silvia, Berridge, John, Kanakaraj, Muthuraj, Cahill, Hazel, Forshaw, Greg, Gibson, Andy, Grainger, Lia, Howard, Kate, James, Katherine, Murphy, Zoe, Sweeting, Helen, Tait, Rebecca, Wilcock, Danielle, Yates, David, Cope, Sean, Allan, Ashley, Betts, Rebecca, Cornell, Sarah, Sheriff, Julie, Woods, Lindsey, Grasselli, Giacomo, Brioni, Matteo, Castagna, Luigi, von Rahden, Richard, Farina, Zane, Green, Samantha, Gumede, Simphiwe, Rajah, Chantal, Ramkillawan, Arisha, Moug, Susan, Alcorn, David, Dalton, Carol, Dickinson, Natalie, Edwards, Jennifer, Henderson, Steven, McIlveen, Erin, Ramsaran, Richard, Bell, Joanne, Fleming, Lorna, Monks, Kathleen, Parker, Jane, Stamper, Sean, Stokes-Denson, Jo, Elías, Elisa, Guerra, Yessica, Rico-Feijoo, Jesu, Kidel, Carlo, Filipe, Helder, Asis, Gretchelle, Gleeson, Yvonne, Harvey, Alice, Jackson, Christine, McNeil, Margaret, Mingo, Sara, Pakou, Glykeria, Pinto, Manuel, Wright, Stephen, Babio-Galan, Maite, Buckley, David, Calder, Verity, Chishti, Ahmad, Cosgrove, Joseph, Cullen, Katherine, Dunn, Leigh, Faulds, Matthew, Fortune, Jonathan, Gardner, Matthew, Harrison, Abigail, Hays, Carole, Jones, Gerry, Macfie, Caroline, Mccullagh, Iain, Nesbitt, Ian, O'Neil, Suzanne, Phoenix, Catherine, Rangaswamy, Girish, Samson, Craig, Scott, Carmen, Shrestha, Tara, Singh, Rita, Soulsby, Graham, Walton, Jon, Zwiggelaar, Kimberley, Lynch, Ceri, Clarke, Heidi, Deacon, Bethan, Ivatt, Helen, Jones, Leanne, Latif, Ahmed, Oram, Shaun, Perman, Chri, Roche, Lisa, Duys, Rowan, Flint, Margot, Bhagwan, Kamal, Coetzee, Ettienne, Joubert, Ivan, Montoya-Pelaez, Felipe, Navsaria, Pradeep, Picken, Guy, Porrill, Owen, Strathie, Grant, Zungu, Thembinkosi, Aluri, Sireesha, Chau, Simon, Cooper, Deborah, Cunningham, Mishell, Daniels, Allison, Hope, Susan, Nicholson, Alice, Walker, Laura, Giarratano, Antonino, Accurso, Giuseppe, Raineri, Santi, Tricoli, Giuseppe, Innes, Richard, Doble, Patricia, Hutter, Joanne, Pawley, Corinne, Tait, Moira, Hamilton, Mark, Andrade, Edward, Barnes, Veronica, Dalton, Claire, Delgado, Carlo, Farnell-Ward, Sarah, Farrah, Helen, Gray, Geraldine, Howlett, Luisa, Joseph, Gipsy, Krupa, Monika, Leaver, Susannah, Macedo, Joao, Maher, Karen, Mellinghoff, Johanne, Oguntimehin, Rachel, Pereira, Joel, Robinson, France, Ryan, Christine, Shah, Nirav, Shirley, Paula, Torborg, Alexandra, Biyase, Thuli, Drummond, Leanne, Kusel, Belinda, Mbuyisa, Mbalenhle, Solala, Sivuyisiwe, Taylor, Jenna, Ezihe-Ejiofor, Adanma, Aduse-Poku, Maame, Colville, Gary, Davies, Louise, Kang, Soo, Phillips, Alex, Kirk-Bayley, Justin, Kelliher, Leigh, Carvelli, Paula, Daysal, Gokce, Dickinson, Matthew, Doyle, Nancileigh, Hughes, Christina, Montague, Laura, Potter, Elizabeth, Salberg, Armorel, Sibug, Sheena, Sivarajan, Sinduja, Thomson, Milo, Wakeford, Nichola, Rocco, Monica, Alampi, Daniela, Conway, Daniel, Clark, Richard, Maria, Jashmin, Pomeroy, Fiona, Quraishi, Tanviha, Williams, Abigail, Chukkambotla, Srikanth, Aherne, Caroline, Harrison-Briggs, Donna, Fitchett, Jill, Duberley, Stephen, Zanoni, Andrea, Cardinale, Daniela, Righi, Claudia, Blunt, Mark, Fuller, Tracy, Hodgson, Ruth, Rosbergen, Melissa, Brennan, Andrew, Akeroyd, Louise, Boardman, Victoria, Bull, Christopher, Carrick, Mike, Chadderton, Ian, Cooper, Sarah, Goellner, Sarah, Graham, Laura, Ilyas, Carl, King, Jame, Laklouk, Muhammad, Lawton, Tom, Macrow, Christopher, Munro, Michael, Neep, Adam, Northey, Martin, Peacock, Victoria, Pye, Kate, Radley, Lydia, Sira, Jame, Smithson, Beth, Syddall, Stuart, Tooth, David, White, Thoma, Hoel, Sindre, Aakre, Elin, Bakke, Monica, Hoivik, Tone, Makowski, Arystarch, Alcock, Harry, Cardoso, Sean, Coetzee, Samantha, Everett, Mary, Ibrahim, Mohamed, Kouridaki, Christina, Ogbeide, Vongayi, Bertellini, Elisabetta, Bertolotti, Valentina, Buono, Antonio, Fanigliulo, Maria, Kumar, Ram, Richards, Nicole, Allana, Alisha, Bacciarelli, Samantha, Barker, Helen, De Bois, Jessica, Bradley, Isabel, Crooks, Jennifer, Daum, Peter, Feben, Alex, Gannon, Lizzie, Kipling, Sarah, Peetamsingh, Andrew, Quamina, Charlotte, Sethi, Sahiba, Sivadhas, Harry, Sollesta, Kathryn, Swain, Andrew, Tan, Evalyn, Willis, Joan, Zou, Maggie, Cranshaw, Juliu, Barratt, Nina, Bowman, Katie, Branney, Debbie, Letts, Maria, Pitts, Sally, Day, Christopher, Benyon, Sarah, Eddy, Sara, Green, Adam, Grice, Anna, Kelly, Sinéad, Mackle, Daisy, Mariano, Victor, Park, Linda, Sibley, Pauline, Spencer, William, Bignami, Elena, Bellini, Valentina, Forfori, Francesco, Curci, Maria, Leo, Alessandra, Jackson, Matthew, Awolesi, Jennifer, Hodgkinson, Sheila, Kent, Alissa, Leonard, Dee, Stapleton, Claire, Tibke, Clare, Alexander-Sefre, Farhad, Campey, Lorraine, Hall, Kathryn, Spimpolo, Jennifer, Nilsson, Malin, Didriksson, Helen, Hamilton, Emma, Carnahan, Mandy, Mowatt, Chri, Stickley, Jo, Corcione, Antonio, Rossi, Giuseppe, Fladby, Hege, Andersen, Nina, Bjoernå, Gunhild, Reite, Mad, Roertveit, Linda, Seidel, Philipp, Arnold, Glenn, Benavente, Melissa, Chattersingh, Anjalee, Chironga, Nyasha, Hornzee, Gillian, Kibaru, Joyce, Malik, Ihtisham, McLeavy, Laura, Pathmanathan, Byiravey, Prior, Florence, Strudwick, Rhea, Vezyrgiannis, Mario, Sinha, Aneeta, Babu, Sheeba, Batuwitage, Bisanth, Daly, Zoe, Ellinor, Katharine, Hawes, Elizabeth, Holmes, Ann, Hudson, Karen, Nightingale, Jeremy, Le Poidevin, Alison, Roberts, Lindsey, Kubisz-Pudelko, Agnieszka, Allison, Joanna, Pippard, Lucy, Hamlyn, Vincent, Organ, Angie, Prabhahar, Thaventhran, Bridger, Hayley, Dvorkin, Lee, Manhas, Vitul, Vincent, Rachel, Laha, Shondipon, Cromie, Terri-Louise, Doyle, Donna, Howarth, Rachel, Verlander, Mark, Watt, Ailsa, Williams, Alexandra, Antonelli, Massimo, Cutuli, Salvatore, Montini, Luca, Graterol, Juan, Adams, Benita, Bean, Sarah, Burt, Karen, Hammonds, Fiona, Jigajinni, Suyogi, Fulton, Laura, Kinghorn, Stephen, Mullenheim, Jost, Baillie, Kirsty, Cain, Martyn, Colling, Kerry, Hannaway, Carol, Corso, Ruggero, Calli, Morena, Ferrando, Carlo, Romero, Esther, Jorge-Monjas, Pablo, Soria-García, María, Gómez-Herreras, José, Rodríguez-Jiménez, Rita, and De Prada-Martín, Blanca

Subjects
Pulmonary and Respiratory Medicine, medicine.medical_treatment, Population, NO, 03 medical and health sciences, 0302 clinical medicine, CPAP, Abdomen, Settore MED/41 - ANESTESIOLOGIA, Intubation, Intratracheal, medicine, Humans, Intubation, 030212 general & internal medicine, Continuous positive airway pressure, Adverse effect, education, education.field_of_study, Continuous Positive Airway Pressure, business.industry, respiratory complications, continuous positive airway pressure, major abdominal surgery, Pneumonia, Middle Aged, medicine.disease, respiratory tract diseases, Intratracheal, Treatment Outcome, 030228 respiratory system, Respiratory failure, Anesthesia, Vomiting, medicine.symptom, Respiratory Insufficiency, business, Abdominal surgery
Abstract

BackgroundRespiratory complications are an important cause of postoperative morbidity. We aimed to investigate whether continuous positive airway pressure (CPAP) administered immediately after major abdominal surgery could prevent postoperative morbidity.MethodsPRISM was an open-label, randomised, phase 3 trial done at 70 hospitals across six countries. Patients aged 50 years or older who were undergoing elective major open abdominal surgery were randomly assigned (1:1) to receive CPAP within 4 h of the end of surgery or usual postoperative care. Patients were randomly assigned using a computer-generated minimisation algorithm with inbuilt concealment. The primary outcome was a composite of pneumonia, endotracheal re-intubation, or death within 30 days after randomisation, assessed in the intention-to-treat population. Safety was assessed in all patients who received CPAP. The trial is registered with the ISRCTN registry, ISRCTN56012545.FindingsBetween Feb 8, 2016, and Nov 11, 2019, 4806 patients were randomly assigned (2405 to the CPAP group and 2401 to the usual care group), of whom 4793 were included in the primary analysis (2396 in the CPAP group and 2397 in the usual care group). 195 (8·1%) of 2396 patients in the CPAP group and 197 (8·2%) of 2397 patients in the usual care group met the composite primary outcome (adjusted odds ratio 1·01 [95% CI 0·81-1·24]; p=0·95). 200 (8·9%) of 2241 patients in the CPAP group had adverse events. The most common adverse events were claustrophobia (78 [3·5%] of 2241 patients), oronasal dryness (43 [1·9%]), excessive air leak (36 [1·6%]), vomiting (26 [1·2%]), and pain (24 [1·1%]). There were two serious adverse events: one patient had significant hearing loss and one patient had obstruction of their venous catheter caused by a CPAP hood, which resulted in transient haemodynamic instability.InterpretationIn this large clinical effectiveness trial, CPAP did not reduce the incidence of pneumonia, endotracheal re-intubation, or death after major abdominal surgery. Although CPAP has an important role in the treatment of respiratory failure after surgery, routine use of prophylactic post-operative CPAP is not recommended.FundingNational Institute for Health Research, Barts Charity, Intersurgical, Association of Anaesthetists, and Sapienza Università di Roma.

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