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Genschmer KR, Russell DW, Lal C, Szul T, Bratcher PE, Noerager BD, Abdul Roda M, Xu X, Rezonzew G, Viera L, Dobosh BS, Margaroli C, Abdalla TH, King RW, McNicholas CM, Wells JM, Dransfield MT, Tirouvanziam R, Gaggar A, Blalock JE. Activated PMN Exosomes: Pathogenic Entities Causing Matrix Destruction and Disease in the Lung. Cell 2019; 176:113-126.e15. [PMID: 30633902 DOI: 10.1016/j.cell.2018.12.002] [Citation(s) in RCA: 249] [Impact Index Per Article: 49.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 05/15/2018] [Accepted: 11/30/2018] [Indexed: 01/19/2023]
Abstract
Here, we describe a novel pathogenic entity, the activated PMN (polymorphonuclear leukocyte, i.e., neutrophil)-derived exosome. These CD63+/CD66b+ nanovesicles acquire surface-bound neutrophil elastase (NE) during PMN degranulation, NE being oriented in a configuration resistant to α1-antitrypsin (α1AT). These exosomes bind and degrade extracellular matrix (ECM) via the integrin Mac-1 and NE, respectively, causing the hallmarks of chronic obstructive pulmonary disease (COPD). Due to both ECM targeting and α1AT resistance, exosomal NE is far more potent than free NE. Importantly, such PMN-derived exosomes exist in clinical specimens from subjects with COPD but not healthy controls and are capable of transferring a COPD-like phenotype from humans to mice in an NE-driven manner. Similar findings were observed for another neutrophil-driven disease of ECM remodeling (bronchopulmonary dysplasia [BPD]). These findings reveal an unappreciated role for exosomes in the pathogenesis of disorders of ECM homeostasis such as COPD and BPD, providing a critical mechanism for proteolytic damage.
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Affiliation(s)
- Kristopher R Genschmer
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Derek W Russell
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Charitharth Lal
- Department of Pediatrics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Translational Research in Disordered and Normal Development Program, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Tomasz Szul
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Preston E Bratcher
- Department of Pediatrics, National Jewish Medical Center, Denver, CO 80206, USA
| | | | - Mojtaba Abdul Roda
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Xin Xu
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Gabriel Rezonzew
- Department of Pediatrics, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Translational Research in Disordered and Normal Development Program, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Liliana Viera
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Brian S Dobosh
- Department of Pediatrics, Center of CF and Airways Disease Research, and Program in Immunology and Molecular Pathogenesis, Emory University, Atlanta, GA, USA
| | - Camilla Margaroli
- Department of Pediatrics, Center of CF and Airways Disease Research, and Program in Immunology and Molecular Pathogenesis, Emory University, Atlanta, GA, USA
| | - Tarek H Abdalla
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Robert W King
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Carmel M McNicholas
- Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Department of Cell, Developmental, and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - J Michael Wells
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Medical Service, Birmingham VA Medical Center Birmingham, AL 35294, USA
| | - Mark T Dransfield
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Medical Service, Birmingham VA Medical Center Birmingham, AL 35294, USA
| | - Rabindra Tirouvanziam
- Department of Pediatrics, Center of CF and Airways Disease Research, and Program in Immunology and Molecular Pathogenesis, Emory University, Atlanta, GA, USA
| | - Amit Gaggar
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Department of Cell, Developmental, and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Medical Service, Birmingham VA Medical Center Birmingham, AL 35294, USA
| | - J Edwin Blalock
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Lung Health Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Program in Protease and Matrix Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Gregory Fleming James Cystic Fibrosis Research Center, The University of Alabama at Birmingham, Birmingham, AL 35294, USA; Department of Cell, Developmental, and Integrative Biology, The University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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Aamodt K, Abel N, Abeysekara U, Abrahantes Quintana A, Abramyan A, Adamová D, Aggarwal MM, Aglieri Rinella G, Agocs AG, Aguilar Salazar S, Ahammed Z, Ahmad A, Ahmad N, Ahn SU, Akimoto R, Akindinov A, Aleksandrov D, Alessandro B, Alfaro Molina R, Alici A, Almaráz Aviña E, Alme J, Alt T, Altini V, Altinpinar S, Andrei C, Andronic A, Anelli G, Angelov V, Anson C, Anticić T, Antinori F, Antinori S, Antipin K, Antończyk D, Antonioli P, Anzo A, Aphecetche L, Appelshäuser H, Arcelli S, Arceo R, Arend A, Armesto N, Arnaldi R, Aronsson T, Arsene IC, Asryan A, Augustinus A, Averbeck R, Awes TC, Aystö J, Azmi MD, Bablok S, Bach M, Badalà A, Baek YW, Bagnasco S, Bailhache R, Bala R, Baldisseri A, Baldit A, Bán J, Barbera R, Barnaföldi GG, Barnby LS, Barret V, Bartke J, Barile F, Basile M, Basmanov V, Bastid N, Bathen B, Batigne G, Batyunya B, Baumann C, Bearden IG, Becker B, Belikov I, Bellwied R, Belmont-Moreno E, Belogianni A, Benhabib L, Beole S, Berceanu I, Bercuci A, Berdermann E, Berdnikov Y, Betev L, Bhasin A, Bhati AK, Bianchi L, Bianchi N, Bianchin C, Bielcík J, Bielcíková J, Bilandzic A, Bimbot L, Biolcati E, Blanc A, Blanco F, Blanco F, Blau D, Blume C, Boccioli M, Bock N, Bogdanov A, Bøggild H, Bogolyubsky M, Bohm J, Boldizsár L, Bombara M, Bombonati C, Bondila M, Borel H, Borisov A, Bortolin C, Bose S, Bosisio L, Bossú F, Botje M, Böttger S, Bourdaud G, Boyer B, Braun M, Braun-Munzinger P, Bravina L, Bregant M, Breitner T, Bruckner G, Brun R, Bruna E, Bruno GE, Budnikov D, Buesching H, Buncic P, Busch O, Buthelezi Z, Caffarri D, Cai X, Caines H, Calvo E, Camacho E, Camerini P, Campbell M, Canoa Roman V, Capitani GP, Cara Romeo G, Carena F, Carena W, Carminati F, Casanova Díaz A, Caselle M, Castillo Castellanos J, Castillo Hernandez JF, Catanescu V, Cattaruzza E, Cavicchioli C, Cerello P, Chambert V, Chang B, Chapeland S, Charpy A, Charvet JL, Chattopadhyay S, Chattopadhyay S, Cherney M, Cheshkov C, Cheynis B, Chiavassa E, Chibante Barroso V, Chinellato DD, Chochula P, Choi K, Chojnacki M, Christakoglou P, Christensen CH, Christiansen P, Chujo T, Chuman F, Cicalo C, Cifarelli L, Cindolo F, Cleymans J, Cobanoglu O, Coffin JP, Coli S, Colla A, Conesa Balbastre G, Conesa Del Valle Z, Conner ES, Constantin P, Contin G, Contreras JG, Corrales Morales Y, Cormier TM, Cortese P, Cortés Maldonado I, Cosentino MR, Costa F, Cotallo ME, Crescio E, Crochet P, Cuautle E, Cunqueiro L, Cussonneau J, Dainese A, Dalsgaard HH, Danu A, Das I, Dash A, Dash S, de Barros GOV, De Caro A, de Cataldo G, de Cuveland J, De Falco A, De Gaspari M, de Groot J, De Gruttola D, De Marco N, De Pasquale S, De Remigis R, de Rooij R, de Vaux G, Delagrange H, Delgado Y, Dellacasa G, Deloff A, Demanov V, Dénes E, Deppman A, D'Erasmo G, Derkach D, Devaux A, Di Bari D, Di Giglio C, Di Liberto S, Di Mauro A, Di Nezza P, Dialinas M, Díaz L, Díaz R, Dietel T, Divià R, Djuvsland O, Dobretsov V, Dobrin A, Dobrowolski T, Dönigus B, Domínguez I, Don DMM, Dordic O, Dubey AK, Dubuisson J, Ducroux L, Dupieux P, Dutta Majumdar AK, Dutta Majumdar MR, Elia D, Emschermann D, Enokizono A, Espagnon B, Estienne M, Esumi S, Evans D, Evrard S, Eyyubova G, Fabjan CW, Fabris D, Faivre J, Falchieri D, Fantoni A, Fasel M, Fateev O, Fearick R, Fedunov A, Fehlker D, Fekete V, Felea D, Fenton-Olsen B, Feofilov G, Fernández Téllez A, Ferreiro EG, Ferretti A, Ferretti R, Figueredo MAS, Filchagin S, Fini R, Fionda FM, Fiore EM, Floris M, Fodor Z, Foertsch S, Foka P, Fokin S, Formenti F, Fragiacomo E, Fragkiadakis M, Frankenfeld U, Frolov A, Fuchs U, Furano F, Furget C, Fusco Girard M, Gaardhøje JJ, Gadrat S, Gagliardi M, Gago A, Gallio M, Ganoti P, Ganti MS, Garabatos C, García Trapaga C, Gebelein J, Gemme R, Germain M, Gheata A, Gheata M, Ghidini B, Ghosh P, Giraudo G, Giubellino P, Gladysz-Dziadus E, Glasow R, Glässel P, Glenn A, Gómez Jiménez R, González Santos H, González-Trueba LH, González-Zamora P, Gorbunov S, Gorbunov Y, Gotovac S, Gottschlag H, Grabski V, Grajcarek R, Grelli A, Grigoras A, Grigoras C, Grigoriev V, Grigoryan A, Grigoryan S, Grinyov B, Grion N, Gros P, Grosse-Oetringhaus JF, Grossiord JY, Grosso R, Guber F, Guernane R, Guerra C, Guerzoni B, Gulbrandsen K, Gulkanyan H, Gunji T, Gupta A, Gupta R, Gustafsson HA, Gutbrod H, Haaland O, Hadjidakis C, Haiduc M, Hamagaki H, Hamar G, Hamblen J, Han BH, Harris JW, Hartig M, Harutyunyan A, Hasch D, Hasegan D, Hatzifotiadou D, Hayrapetyan A, Heide M, Heinz M, Helstrup H, Herghelegiu A, Hernández C, Herrera Corral G, Herrmann N, Hetland KF, Hicks B, Hiei A, Hille PT, Hippolyte B, Horaguchi T, Hori Y, Hristov P, Hrivnácová I, Hu S, Huang M, Huber S, Humanic TJ, Hutter D, Hwang DS, Ichou R, Ilkaev R, Ilkiv I, Inaba M, Innocenti PG, Ippolitov M, Irfan M, Ivan C, Ivanov A, Ivanov M, Ivanov V, Iwasaki T, Jachołkowski A, Jacobs P, Jancurová L, Jangal S, Janik R, Jena C, Jena S, Jirden L, Jones GT, Jones PG, Jovanović P, Jung H, Jung W, Jusko A, Kaidalov AB, Kalcher S, Kalinák P, Kalisky M, Kalliokoski T, Kalweit A, Kamal A, Kamermans R, Kanaki K, Kang E, Kang JH, Kapitan J, Kaplin V, Kapusta S, Karavichev O, Karavicheva T, Karpechev E, Kazantsev A, Kebschull U, Keidel R, Khan MM, Khan SA, Khanzadeev A, Kharlov Y, Kikola D, Kileng B, Kim DJ, Kim DS, Kim DW, Kim HN, Kim J, Kim JH, Kim JS, Kim M, Kim M, Kim SH, Kim S, Kim Y, Kirsch S, Kisel I, Kiselev S, Kisiel A, Klay JL, Klein J, Klein-Bösing C, Kliemant M, Klovning A, Kluge A, Knichel ML, Kniege S, Koch K, Kolevatov R, Kolojvari A, Kondratiev V, Kondratyeva N, Konevskih A, Kornaś E, Kour R, Kowalski M, Kox S, Kozlov K, Kral J, Králik I, Kramer F, Kraus I, Kravcáková A, Krawutschke T, Krivda M, Krumbhorn D, Krus M, Kryshen E, Krzewicki M, Kucheriaev Y, Kuhn C, Kuijer PG, Kumar L, Kumar N, Kupczak R, Kurashvili P, Kurepin A, Kurepin AN, Kuryakin A, Kushpil S, Kushpil V, Kutouski M, Kvaerno H, Kweon MJ, Kwon Y, La Rocca P, Lackner F, Ladrón de Guevara P, Lafage V, Lal C, Lara C, Larsen DT, Laurenti G, Lazzeroni C, Le Bornec Y, Le Bris N, Lee H, Lee KS, Lee SC, Lefèvre F, Lenhardt M, Leistam L, Lehnert J, Lenti V, León H, León Monzón I, León Vargas H, Lévai P, Li X, Li Y, Lietava R, Lindal S, Lindenstruth V, Lippmann C, Lisa MA, Liu L, Loginov V, Lohn S, Lopez X, López Noriega M, López-Ramírez R, López Torres E, Løvhøiden G, Lozea Feijo Soares A, Lu S, Lunardon M, Luparello G, Luquin L, Lutz JR, Ma K, Ma R, Madagodahettige-Don DM, Maevskaya A, Mager M, Mahapatra DP, Maire A, Makhlyueva I, Mal'kevich D, Malaev M, Malagalage KJ, Maldonado Cervantes I, Malek M, Malkiewicz T, Malzacher P, Mamonov A, Manceau L, Mangotra L, Manko V, Manso F, Manzari V, Mao Y, Mares J, Margagliotti GV, Margotti A, Marín A, Martashvili I, Martinengo P, Martínez Hernández MI, Martínez Davalos A, Martínez García G, Maruyama Y, Marzari Chiesa A, Masciocchi S, Masera M, Masetti M, Masoni A, Massacrier L, Mastromarco M, Mastroserio A, Matthews ZL, Matyja A, Mayani D, Mazza G, Mazzoni MA, Meddi F, Menchaca-Rocha A, Mendez Lorenzo P, Meoni M, Mercado Pérez 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Papikyan V, Pappalardo GS, Park WJ, Pastircák B, Pastore C, Paticchio V, Pavlinov A, Pawlak T, Peitzmann T, Pepato A, Pereira H, Peressounko D, Pérez C, Perini D, Perrino D, Peryt W, Peschek J, Pesci A, Peskov V, Pestov Y, Peters AJ, Petrácek V, Petridis A, Petris M, Petrov P, Petrovici M, Petta C, Peyré J, Piano S, Piccotti A, Pikna M, Pillot P, Pinazza O, Pinsky L, Pitz N, Piuz F, Platt R, Płoskoń M, Pluta J, Pocheptsov T, Pochybova S, Podesta Lerma PLM, Poggio F, Poghosyan MG, Polák K, Polichtchouk B, Polozov P, Polyakov V, Pommeresch B, Pop A, Posa F, Pospísil V, Potukuchi B, Pouthas J, Prasad SK, Preghenella R, Prino F, Pruneau CA, Pshenichnov I, Puddu G, Pujahari P, Pulvirenti A, Punin A, Punin V, Putis M, Putschke J, Quercigh E, Rachevski A, Rademakers A, Radomski S, Räihä TS, Rak J, Rakotozafindrabe A, Ramello L, Ramírez Reyes A, Rammler M, Raniwala R, Raniwala S, Räsänen SS, Rashevskaya I, Rath S, Read KF, Real JS, Redlich K, Renfordt R, Reolon AR, Reshetin A, Rettig F, Revol JP, Reygers K, Ricaud H, Riccati L, Ricci RA, Richter M, Riedler P, Riegler W, Riggi F, Rivetti A, Rodriguez Cahuantzi M, Røed K, Röhrich D, Román López S, Romita R, Ronchetti F, Rosinský P, Rosnet P, Rossegger S, Rossi A, Roukoutakis F, Rousseau S, Roy C, Roy P, Rubio-Montero AJ, Rui R, Rusanov I, Russo G, Ryabinkin E, Rybicki A, Sadovsky S, Safarík K, Sahoo R, Saini J, Saiz P, Sakata D, Salgado CA, Salgueiro Domingues da Silva R, Salur S, Samanta T, Sambyal S, Samsonov V, Sándor L, Sandoval A, Sano M, Sano S, Santo R, Santoro R, Sarkamo J, Saturnini P, Scapparone E, Scarlassara F, Scharenberg RP, Schiaua C, Schicker R, Schindler H, Schmidt C, Schmidt HR, Schossmaier K, Schreiner S, Schuchmann S, Schukraft J, Schutz Y, Schwarz K, Schweda K, Scioli G, Scomparin E, Scott PA, Segato G, Semenov D, Senyukov S, Seo J, Serci S, Serkin L, Serradilla E, Sevcenco A, Sgura I, Shabratova G, Shahoyan R, Sharkov G, Sharma N, Sharma S, Shigaki K, Shimomura M, Shtejer K, Sibiriak Y, Siciliano M, Sicking E, Siddi E, Siemiarczuk T, Silenzi A, Silvermyr D, Simili E, Simonetti G, Singaraju R, Singh R, Singhal V, Sinha BC, Sinha T, Sitar B, Sitta M, Skaali TB, Skjerdal K, Smakal R, Smirnov N, Snellings R, Snow H, Søgaard C, Soloviev A, Soltveit HK, Soltz R, Sommer W, Son CW, Son H, Song M, Soos C, Soramel F, Soyk D, Spyropoulou-Stassinaki M, Srivastava BK, Stachel J, Staley F, Stan E, Stefanek G, Stefanini G, Steinbeck T, Stenlund E, Steyn G, Stocco D, Stock R, Stolpovsky P, Strmen P, Suaide AAP, Subieta Vásquez MA, Sugitate T, Suire C, Sumbera M, Susa T, Swoboda D, Symons J, Szanto de Toledo A, Szarka I, Szostak A, Szuba M, Tadel M, Tagridis C, Takahara A, Takahashi J, Tanabe R, Tapia Takaki JD, Taureg H, Tauro A, Tavlet M, Tejeda Muñoz G, Telesca A, Terrevoli C, Thäder J, Tieulent R, Tlusty D, Toia A, Tolyhy T, Torcato de Matos C, Torii H, Torralba G, Toscano L, Tosello F, Tournaire A, Traczyk T, Tribedy P, Tröger G, Truesdale D, Trzaska WH, Tsiledakis G, Tsilis E, Tsuji T, Tumkin A, Turrisi R, Turvey A, Tveter TS, Tydesjö H, Tywoniuk K, Ulery J, Ullaland K, Uras A, Urbán J, Urciuoli GM, Usai GL, Vacchi A, Vala M, Valencia Palomo L, Vallero S, van der Kolk N, Vande Vyvre P, van Leeuwen M, Vannucci L, Vargas A, Varma R, Vasiliev A, Vassiliev I, Vasileiou M, Vechernin V, Venaruzzo M, Vercellin E, Vergara S, Vernet R, Verweij M, Vetlitskiy I, Vickovic L, Viesti G, Vikhlyantsev O, Vilakazi Z, Villalobos Baillie O, Vinogradov A, Vinogradov L, Vinogradov Y, Virgili T, Viyogi YP, Vodopianov A, Voloshin K, Voloshin S, Volpe G, von Haller B, Vranic D, Vrláková J, Vulpescu B, Wagner B, Wagner V, Wallet L, Wan R, Wang D, Wang Y, Wang Y, Watanabe K, Wen Q, Wessels J, Westerhoff U, Wiechula J, Wikne J, Wilk A, Wilk G, Williams MCS, Willis N, Windelband B, Xu C, Yang C, Yang H, Yasnopolskiy S, Yermia F, Yi J, Yin Z, Yokoyama H, Yoo IK, Yuan X, Yurevich V, Yushmanov I, Zabrodin E, Zagreev B, Zalite A, Zampolli C, Zanevsky Y, Zaporozhets S, Zarochentsev A, Závada P, Zbroszczyk H, Zelnicek P, Zenin A, Zepeda A, Zgura I, Zhalov M, Zhang X, Zhou D, Zhou S, Zhu J, Zichichi A, Zinchenko A, Zinovjev G, Zoccarato Y, Zychácek V, Zynovyev M. Midrapidity antiproton-to-proton ratio in pp collisons at sqrt[s]=0.9 and 7 TeV measured by the ALICE experiment. Phys Rev Lett 2010; 105:072002. [PMID: 20868032 DOI: 10.1103/physrevlett.105.072002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Indexed: 05/29/2023]
Abstract
The ratio of the yields of antiprotons to protons in pp collisions has been measured by the ALICE experiment at sqrt[s]=0.9 and 7 TeV during the initial running periods of the Large Hadron Collider. The measurement covers the transverse momentum interval 0.45<p_{t}<1.05 GeV/c and rapidity |y|<0.5. The ratio is measured to be R_{|y|<0.5}=0.957±0.006(stat)±0.014(syst) at 0.9 TeV and R_{|y|<0.5}=0.991±0.005(stat)±0.014(syst) at 7 TeV and it is independent of both rapidity and transverse momentum. The results are consistent with the conventional model of baryon-number transport and set stringent limits on any additional contributions to baryon-number transfer over very large rapidity intervals in pp collisions.
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Affiliation(s)
- K Aamodt
- Department of Physics, University of Oslo, Oslo, Norway
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