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Elliott K, Veley KM, Jensen G, Gilbert KB, Norton J, Kambic L, Yoder M, Weil A, Motomura-Wages S, Bart RS. CRISPR/Cas9-generated mutations in a sugar transporter gene reduce cassava susceptibility to bacterial blight. Plant Physiol 2024:kiae243. [PMID: 38701041 DOI: 10.1093/plphys/kiae243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 04/02/2024] [Accepted: 04/02/2024] [Indexed: 05/05/2024]
Abstract
Bacteria from the genus Xanthomonas are prolific phytopathogens that elicit disease in over 400 plant species. Xanthomonads carry a repertoire of specialized proteins called transcription activator-like (TAL) effectors that promote disease and pathogen virulence by inducing expression of host susceptibility (S) genes. Xanthomonas phaseoli pv. manihotis (Xpm) causes bacterial blight on the staple food crop cassava (Manihot esculenta Crantz). The Xpm effector TAL20 induces ectopic expression of the S gene Manihot esculenta Sugars Will Eventually be Exported Transporter 10a (MeSWEET10a), which encodes a sugar transporter that contributes to cassava bacterial blight susceptibility. We used CRISPR/Cas9 to generate multiple cassava lines with edits to the MeSWEET10a TAL20 effector binding site and/or coding sequence. In several of the regenerated lines, MeSWEET10a expression was no longer induced by Xpm, and in these cases, we observed reduced cassava bacterial blight (CBB) disease symptoms post Xpm infection. Because MeSWEET10a is expressed in cassava flowers, we further characterized the reproductive capability of the MeSWEET10a promoter and coding sequence mutants. Lines were crossed to themselves and to wild-type plants. The results indicated that expression of MeSWEET10a in female, but not male, flowers, is critical to produce viable F1 seed. In the case of promoter mutations that left the coding sequence intact, viable F1 progeny were recovered. Taken together, these results demonstrate that blocking MeSWEET10a induction is a viable strategy for decreasing cassava susceptibility to CBB and that ideal lines will contain promoter mutations that block TAL effector binding while leaving endogenous expression of MeSWEET10a unaltered.
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Affiliation(s)
- Kiona Elliott
- Donald Danforth Plant Science Center; Saint Louis, MO 63132, USA
- Division of Biological and Biomedical Sciences, Washington University in Saint Louis, St. Louis, MO, 63110, USA
| | - Kira M Veley
- Donald Danforth Plant Science Center; Saint Louis, MO 63132, USA
| | - Greg Jensen
- Donald Danforth Plant Science Center; Saint Louis, MO 63132, USA
| | | | - Joanna Norton
- College of Tropical Agriculture & Human Resources, University of Hawaii at Manoa, Hilo, HI 96720, USA
| | - Lukas Kambic
- College of Tropical Agriculture & Human Resources, University of Hawaii at Manoa, Hilo, HI 96720, USA
| | - Marisa Yoder
- Donald Danforth Plant Science Center; Saint Louis, MO 63132, USA
| | - Alex Weil
- Donald Danforth Plant Science Center; Saint Louis, MO 63132, USA
| | - Sharon Motomura-Wages
- College of Tropical Agriculture & Human Resources, University of Hawaii at Manoa, Hilo, HI 96720, USA
| | - Rebecca S Bart
- Donald Danforth Plant Science Center; Saint Louis, MO 63132, USA
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Crooks R, Davidson L, Elliott K, O'Hara G, Gibson E, Kelly R, McAleese J, Masih I. Bedside physician led US-guided supra-clavicular lymph node biopsy and ROSE (rapid on-site evaluation): SVC obstruction swift management in lung cancer. Respir Med Case Rep 2024; 49:101978. [PMID: 38623376 PMCID: PMC11017039 DOI: 10.1016/j.rmcr.2024.101978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/21/2023] [Accepted: 01/05/2024] [Indexed: 04/17/2024] Open
Abstract
Superior vena cava obstruction (SVCO) is an oncological emergency and can often be linked to an underlying lung malignancy. Due to the potential life-threatening risks associated with SVCO, it necessitates urgent diagnosis and management. In this report, we discuss 3 case studies where the use of ultrasound-guided supraclavicular lymph node biopsy was used to obtain a biopsy from patients with SVCO, followed by rapid on-site evaluation (ROSE). The benefits of this technique ensure a more rapid histological diagnosis, while also involving a less invasive procedure for the patient. The histological diagnosis is essential in improving patient outcomes when treating those with SVCO as the recommended treatments vary depending on the underlying type of lung malignancy. Having this information can help the clinician swiftly employ the optimal treatment pathway for the patient.
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Affiliation(s)
- R. Crooks
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
| | - L. Davidson
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
| | - K. Elliott
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
| | - G. O'Hara
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
| | - Eddie Gibson
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
| | - R. Kelly
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
| | - J. McAleese
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
| | - I. Masih
- Departments of Respiratory, Radiology and Histology, Antrim Hospital, Ireland
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Christian RJ, Baccon J, Knollmann-Ritschel B, Elliott K, Laposata M, Conran RM. The Need for Laboratory Medicine in the Undergraduate Medical Education Curriculum: A White Paper from the Association of Pathology Chairs. Med Sci Educ 2024; 34:193-200. [PMID: 38510385 PMCID: PMC10948729 DOI: 10.1007/s40670-023-01895-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/21/2023] [Indexed: 03/22/2024]
Abstract
Considering laboratory results are used to make medical decisions, a fundamental understanding of laboratory medicine is paramount to enhance patient care, optimize health care cost containment, and prevent legal repercussions. With increasing laboratory testing complexity, this education is needed now more than ever. This article is a call to action to have medical schools adequately incorporate practical laboratory medicine content into their undergraduate medical education (UME) curricula. The authors discuss the definition of laboratory medicine, what it encompasses, who uses it and why it matters, and propose that a core laboratory medicine curriculum is a necessary part of UME.
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Affiliation(s)
- R. J. Christian
- Department of Pathology and Laboratory Medicine, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, L-113 Portland, OR USA
| | - J. Baccon
- Department of Pathology and Laboratory Medicine, Akron Children’s Hospital, Akron, OH USA
- Department of Pathology, Northeast Ohio Medical University, Rootstown, OH USA
| | - B. Knollmann-Ritschel
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD USA
| | - K. Elliott
- Department of Pathology and Laboratory Medicine, University of Vermont Medical Center, Burlington, VT USA
| | - M. Laposata
- Department of Pathology, University of Texas Medical Branch, Galveston, TX USA
| | - R. M. Conran
- Department of Pathology and Anatomy, Eastern Virginia Medical School, Norfolk, VA USA
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Raman B, McCracken C, Cassar MP, Moss AJ, Finnigan L, Samat AHA, Ogbole G, Tunnicliffe EM, Alfaro-Almagro F, Menke R, Xie C, Gleeson F, Lukaschuk E, Lamlum H, McGlynn K, Popescu IA, Sanders ZB, Saunders LC, Piechnik SK, Ferreira VM, Nikolaidou C, Rahman NM, Ho LP, Harris VC, Shikotra A, Singapuri A, Pfeffer P, Manisty C, Kon OM, Beggs M, O'Regan DP, Fuld J, Weir-McCall JR, Parekh D, Steeds R, Poinasamy K, Cuthbertson DJ, Kemp GJ, Semple MG, Horsley A, Miller CA, O'Brien C, Shah AM, Chiribiri A, Leavy OC, Richardson M, Elneima O, McAuley HJC, Sereno M, Saunders RM, Houchen-Wolloff L, Greening NJ, Bolton CE, Brown JS, Choudhury G, Diar Bakerly N, Easom N, Echevarria C, Marks M, Hurst JR, Jones MG, Wootton DG, Chalder T, Davies MJ, De Soyza A, Geddes JR, Greenhalf W, Howard LS, Jacob J, Man WDC, Openshaw PJM, Porter JC, Rowland MJ, Scott JT, Singh SJ, Thomas DC, Toshner M, Lewis KE, Heaney LG, Harrison EM, Kerr S, Docherty AB, Lone NI, Quint J, Sheikh A, Zheng B, Jenkins RG, Cox E, Francis S, Halling-Brown M, Chalmers JD, Greenwood JP, Plein S, Hughes PJC, Thompson AAR, Rowland-Jones SL, Wild JM, Kelly M, Treibel TA, Bandula S, Aul R, Miller K, Jezzard P, Smith S, Nichols TE, McCann GP, Evans RA, Wain LV, Brightling CE, Neubauer S, Baillie JK, Shaw A, Hairsine B, Kurasz C, Henson H, Armstrong L, Shenton L, Dobson H, Dell A, Lucey A, Price A, Storrie A, Pennington C, Price C, Mallison G, Willis G, Nassa H, Haworth J, Hoare M, Hawkings N, Fairbairn S, Young S, Walker S, Jarrold I, Sanderson A, David C, Chong-James K, Zongo O, James WY, Martineau A, King B, Armour C, McAulay D, Major E, McGinness J, McGarvey L, Magee N, Stone R, Drain S, Craig T, Bolger A, Haggar A, Lloyd A, Subbe C, Menzies D, Southern D, McIvor E, Roberts K, Manley R, Whitehead V, Saxon W, Bularga A, Mills NL, El-Taweel H, Dawson J, Robinson L, Saralaya D, Regan K, Storton K, Brear L, Amoils S, Bermperi A, Elmer A, Ribeiro C, Cruz I, Taylor J, Worsley J, Dempsey K, Watson L, Jose S, Marciniak S, Parkes M, McQueen A, Oliver C, Williams J, Paradowski K, Broad L, Knibbs L, Haynes M, Sabit R, Milligan L, Sampson C, Hancock A, Evenden C, Lynch C, Hancock K, Roche L, Rees M, Stroud N, Thomas-Woods T, Heller S, Robertson E, Young B, Wassall H, Babores M, Holland M, Keenan N, Shashaa S, Price C, Beranova E, Ramos H, Weston H, Deery J, Austin L, Solly R, Turney S, Cosier T, Hazelton T, Ralser M, Wilson A, Pearce L, Pugmire S, Stoker W, McCormick W, Dewar A, Arbane G, Kaltsakas G, Kerslake H, Rossdale J, Bisnauthsing K, Aguilar Jimenez LA, Martinez LM, Ostermann M, Magtoto MM, Hart N, Marino P, Betts S, Solano TS, Arias AM, Prabhu A, Reed A, Wrey Brown C, Griffin D, Bevan E, Martin J, Owen J, Alvarez Corral M, Williams N, Payne S, Storrar W, Layton A, Lawson C, Mills C, Featherstone J, Stephenson L, Burdett T, Ellis Y, Richards A, Wright C, Sykes DL, Brindle K, Drury K, Holdsworth L, Crooks MG, Atkin P, Flockton R, Thackray-Nocera S, Mohamed A, Taylor A, Perkins E, Ross G, McGuinness H, Tench H, Phipps J, Loosley R, Wolf-Roberts R, Coetzee S, Omar Z, Ross A, Card B, Carr C, King C, Wood C, Copeland D, Calvelo E, Chilvers ER, Russell E, Gordon H, Nunag JL, Schronce J, March K, Samuel K, Burden L, Evison L, McLeavey L, Orriss-Dib L, Tarusan L, Mariveles M, Roy M, Mohamed N, Simpson N, Yasmin N, Cullinan P, Daly P, Haq S, Moriera S, Fayzan T, Munawar U, Nwanguma U, Lingford-Hughes A, Altmann D, Johnston D, Mitchell J, Valabhji J, Price L, Molyneaux PL, Thwaites RS, Walsh S, Frankel A, Lightstone L, Wilkins M, Willicombe M, McAdoo S, Touyz R, Guerdette AM, Warwick K, Hewitt M, Reddy R, White S, McMahon A, Hoare A, Knighton A, Ramos A, Te A, Jolley CJ, Speranza F, Assefa-Kebede H, Peralta I, Breeze J, Shevket K, Powell N, Adeyemi O, Dulawan P, Adrego R, Byrne S, Patale S, Hayday A, Malim M, Pariante C, Sharpe C, Whitney J, Bramham K, Ismail K, Wessely S, Nicholson T, Ashworth A, Humphries A, Tan AL, Whittam B, Coupland C, Favager C, Peckham D, Wade E, Saalmink G, Clarke J, Glossop J, Murira J, Rangeley J, Woods J, Hall L, Dalton M, Window N, Beirne P, Hardy T, Coakley G, Turtle L, Berridge A, Cross A, Key AL, Rowe A, Allt AM, Mears C, Malein F, Madzamba G, Hardwick HE, Earley J, Hawkes J, Pratt J, Wyles J, Tripp KA, Hainey K, Allerton L, Lavelle-Langham L, Melling L, Wajero LO, Poll L, Noonan MJ, French N, Lewis-Burke N, Williams-Howard SA, Cooper S, Kaprowska S, Dobson SL, Marsh S, Highett V, Shaw V, Beadsworth M, Defres S, Watson E, Tiongson GF, Papineni P, Gurram S, Diwanji SN, Quaid S, Briggs A, Hastie C, Rogers N, Stensel D, Bishop L, McIvor K, Rivera-Ortega P, Al-Sheklly B, Avram C, Faluyi D, Blaikely J, Piper Hanley K, Radhakrishnan K, Buch M, Hanley NA, Odell N, Osbourne R, Stockdale S, Felton T, Gorsuch T, Hussell T, Kausar Z, Kabir T, McAllister-Williams H, Paddick S, Burn D, Ayoub A, Greenhalgh A, Sayer A, Young A, Price D, Burns G, MacGowan G, Fisher H, Tedd H, Simpson J, Jiwa K, Witham M, Hogarth P, West S, Wright S, McMahon MJ, Neill P, Dougherty A, Morrow A, Anderson D, Grieve D, Bayes H, Fallon K, Mangion K, Gilmour L, Basu N, Sykes R, Berry C, McInnes IB, Donaldson A, Sage EK, Barrett F, Welsh B, Bell M, Quigley J, Leitch K, Macliver L, Patel M, Hamil R, Deans A, Furniss J, Clohisey S, Elliott A, Solstice AR, Deas C, Tee C, Connell D, Sutherland D, George J, Mohammed S, Bunker J, Holmes K, Dipper A, Morley A, Arnold D, Adamali H, Welch H, Morrison L, Stadon L, Maskell N, Barratt S, Dunn S, Waterson S, Jayaraman B, Light T, Selby N, Hosseini A, Shaw K, Almeida P, Needham R, Thomas AK, Matthews L, Gupta A, Nikolaidis A, Dupont C, Bonnington J, Chrystal M, Greenhaff PL, Linford S, Prosper S, Jang W, Alamoudi A, Bloss A, Megson C, Nicoll D, Fraser E, Pacpaco E, Conneh F, Ogg G, McShane H, Koychev I, Chen J, Pimm J, Ainsworth M, Pavlides M, Sharpe M, Havinden-Williams M, Petousi N, Talbot N, Carter P, Kurupati P, Dong T, Peng Y, Burns A, Kanellakis N, Korszun A, Connolly B, Busby J, Peto T, Patel B, Nolan CM, Cristiano D, Walsh JA, Liyanage K, Gummadi M, Dormand N, Polgar O, George P, Barker RE, Patel S, Price L, Gibbons M, Matila D, Jarvis H, Lim L, Olaosebikan O, Ahmad S, Brill S, Mandal S, Laing C, Michael A, Reddy A, Johnson C, Baxendale H, Parfrey H, Mackie J, Newman J, Pack J, Parmar J, Paques K, Garner L, Harvey A, Summersgill C, Holgate D, Hardy E, Oxton J, Pendlebury J, McMorrow L, Mairs N, Majeed N, Dark P, Ugwuoke R, Knight S, Whittaker S, Strong-Sheldrake S, Matimba-Mupaya W, Chowienczyk P, Pattenadk D, Hurditch E, Chan F, Carborn H, Foot H, Bagshaw J, Hockridge J, Sidebottom J, Lee JH, Birchall K, Turner K, Haslam L, Holt L, Milner L, Begum M, Marshall M, Steele N, Tinker N, Ravencroft P, Butcher R, Misra S, Walker S, Coburn Z, Fairman A, Ford A, Holbourn A, Howell A, Lawrie A, Lye A, Mbuyisa A, Zawia A, Holroyd-Hind B, Thamu B, Clark C, Jarman C, Norman C, Roddis C, Foote D, Lee E, Ilyas F, Stephens G, Newell H, Turton H, Macharia I, Wilson I, Cole J, McNeill J, Meiring J, Rodger J, Watson J, Chapman K, Harrington K, Chetham L, Hesselden L, Nwafor L, Dixon M, Plowright M, Wade P, Gregory R, Lenagh R, Stimpson R, Megson S, Newman T, Cheng Y, Goodwin C, Heeley C, Sissons D, Sowter D, Gregory H, Wynter I, Hutchinson J, Kirk J, Bennett K, Slack K, Allsop L, Holloway L, Flynn M, Gill M, Greatorex M, Holmes M, Buckley P, Shelton S, Turner S, Sewell TA, Whitworth V, Lovegrove W, Tomlinson J, Warburton L, Painter S, Vickers C, Redwood D, Tilley J, Palmer S, Wainwright T, Breen G, Hotopf M, Dunleavy A, Teixeira J, Ali M, Mencias M, Msimanga N, Siddique S, Samakomva T, Tavoukjian V, Forton D, Ahmed R, Cook A, Thaivalappil F, Connor L, Rees T, McNarry M, Williams N, McCormick J, McIntosh J, Vere J, Coulding M, Kilroy S, Turner V, Butt AT, Savill H, Fraile E, Ugoji J, Landers G, Lota H, Portukhay S, Nasseri M, Daniels A, Hormis A, Ingham J, Zeidan L, Osborne L, Chablani M, Banerjee A, David A, Pakzad A, Rangelov B, Williams B, Denneny E, Willoughby J, Xu M, Mehta P, Batterham R, Bell R, Aslani S, Lilaonitkul W, Checkley A, Bang D, Basire D, Lomas D, Wall E, Plant H, Roy K, Heightman M, Lipman M, Merida Morillas M, Ahwireng N, Chambers RC, Jastrub R, Logan S, Hillman T, Botkai A, Casey A, Neal A, Newton-Cox A, Cooper B, Atkin C, McGee C, Welch C, Wilson D, Sapey E, Qureshi H, Hazeldine J, Lord JM, Nyaboko J, Short J, Stockley J, Dasgin J, Draxlbauer K, Isaacs K, Mcgee K, Yip KP, Ratcliffe L, Bates M, Ventura M, Ahmad Haider N, Gautam N, Baggott R, Holden S, Madathil S, Walder S, Yasmin S, Hiwot T, Jackson T, Soulsby T, Kamwa V, Peterkin Z, Suleiman Z, Chaudhuri N, Wheeler H, Djukanovic R, Samuel R, Sass T, Wallis T, Marshall B, Childs C, Marouzet E, Harvey M, Fletcher S, Dickens C, Beckett P, Nanda U, Daynes E, Charalambou A, Yousuf AJ, Lea A, Prickett A, Gooptu B, Hargadon B, Bourne C, Christie C, Edwardson C, Lee D, Baldry E, Stringer E, Woodhead F, Mills G, Arnold H, Aung H, Qureshi IN, Finch J, Skeemer J, Hadley K, Khunti K, Carr L, Ingram L, Aljaroof M, Bakali M, Bakau M, Baldwin M, Bourne M, Pareek M, Soares M, Tobin M, Armstrong N, Brunskill N, Goodman N, Cairns P, Haldar P, McCourt P, Dowling R, Russell R, Diver S, Edwards S, Glover S, Parker S, Siddiqui S, Ward TJC, Mcnally T, Thornton T, Yates T, Ibrahim W, Monteiro W, Thickett D, Wilkinson D, Broome M, McArdle P, Upthegrove R, Wraith D, Langenberg C, Summers C, Bullmore E, Heeney JL, Schwaeble W, Sudlow CL, Adeloye D, Newby DE, Rudan I, Shankar-Hari M, Thorpe M, Pius R, Walmsley S, McGovern A, Ballard C, Allan L, Dennis J, Cavanagh J, Petrie J, O'Donnell K, Spears M, Sattar N, MacDonald S, Guthrie E, Henderson M, Guillen Guio B, Zhao B, Lawson C, Overton C, Taylor C, Tong C, Mukaetova-Ladinska E, Turner E, Pearl JE, Sargant J, Wormleighton J, Bingham M, Sharma M, Steiner M, Samani N, Novotny P, Free R, Allen RJ, Finney S, Terry S, Brugha T, Plekhanova T, McArdle A, Vinson B, Spencer LG, Reynolds W, Ashworth M, Deakin B, Chinoy H, Abel K, Harvie M, Stanel S, Rostron A, Coleman C, Baguley D, Hufton E, Khan F, Hall I, Stewart I, Fabbri L, Wright L, Kitterick P, Morriss R, Johnson S, Bates A, Antoniades C, Clark D, Bhui K, Channon KM, Motohashi K, Sigfrid L, Husain M, Webster M, Fu X, Li X, Kingham L, Klenerman P, Miiler K, Carson G, Simons G, Huneke N, Calder PC, Baldwin D, Bain S, Lasserson D, Daines L, Bright E, Stern M, Crisp P, Dharmagunawardena R, Reddington A, Wight A, Bailey L, Ashish A, Robinson E, Cooper J, Broadley A, Turnbull A, Brookes C, Sarginson C, Ionita D, Redfearn H, Elliott K, Barman L, Griffiths L, Guy Z, Gill R, Nathu R, Harris E, Moss P, Finnigan J, Saunders K, Saunders P, Kon S, Kon SS, O'Brien L, Shah K, Shah P, Richardson E, Brown V, Brown M, Brown J, Brown J, Brown A, Brown A, Brown M, Choudhury N, Jones S, Jones H, Jones L, Jones I, Jones G, Jones H, Jones D, Davies F, Davies E, Davies K, Davies G, Davies GA, Howard K, Porter J, Rowland J, Rowland A, Scott K, Singh S, Singh C, Thomas S, Thomas C, Lewis V, Lewis J, Lewis D, Harrison P, Francis C, Francis R, Hughes RA, Hughes J, Hughes AD, Thompson T, Kelly S, Smith D, Smith N, Smith A, Smith J, Smith L, Smith S, Evans T, Evans RI, Evans D, Evans R, Evans H, Evans J. Multiorgan MRI findings after hospitalisation with COVID-19 in the UK (C-MORE): a prospective, multicentre, observational cohort study. Lancet Respir Med 2023; 11:1003-1019. [PMID: 37748493 PMCID: PMC7615263 DOI: 10.1016/s2213-2600(23)00262-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 06/16/2023] [Accepted: 06/30/2023] [Indexed: 09/27/2023]
Abstract
INTRODUCTION The multiorgan impact of moderate to severe coronavirus infections in the post-acute phase is still poorly understood. We aimed to evaluate the excess burden of multiorgan abnormalities after hospitalisation with COVID-19, evaluate their determinants, and explore associations with patient-related outcome measures. METHODS In a prospective, UK-wide, multicentre MRI follow-up study (C-MORE), adults (aged ≥18 years) discharged from hospital following COVID-19 who were included in Tier 2 of the Post-hospitalisation COVID-19 study (PHOSP-COVID) and contemporary controls with no evidence of previous COVID-19 (SARS-CoV-2 nucleocapsid antibody negative) underwent multiorgan MRI (lungs, heart, brain, liver, and kidneys) with quantitative and qualitative assessment of images and clinical adjudication when relevant. Individuals with end-stage renal failure or contraindications to MRI were excluded. Participants also underwent detailed recording of symptoms, and physiological and biochemical tests. The primary outcome was the excess burden of multiorgan abnormalities (two or more organs) relative to controls, with further adjustments for potential confounders. The C-MORE study is ongoing and is registered with ClinicalTrials.gov, NCT04510025. FINDINGS Of 2710 participants in Tier 2 of PHOSP-COVID, 531 were recruited across 13 UK-wide C-MORE sites. After exclusions, 259 C-MORE patients (mean age 57 years [SD 12]; 158 [61%] male and 101 [39%] female) who were discharged from hospital with PCR-confirmed or clinically diagnosed COVID-19 between March 1, 2020, and Nov 1, 2021, and 52 non-COVID-19 controls from the community (mean age 49 years [SD 14]; 30 [58%] male and 22 [42%] female) were included in the analysis. Patients were assessed at a median of 5·0 months (IQR 4·2-6·3) after hospital discharge. Compared with non-COVID-19 controls, patients were older, living with more obesity, and had more comorbidities. Multiorgan abnormalities on MRI were more frequent in patients than in controls (157 [61%] of 259 vs 14 [27%] of 52; p<0·0001) and independently associated with COVID-19 status (odds ratio [OR] 2·9 [95% CI 1·5-5·8]; padjusted=0·0023) after adjusting for relevant confounders. Compared with controls, patients were more likely to have MRI evidence of lung abnormalities (p=0·0001; parenchymal abnormalities), brain abnormalities (p<0·0001; more white matter hyperintensities and regional brain volume reduction), and kidney abnormalities (p=0·014; lower medullary T1 and loss of corticomedullary differentiation), whereas cardiac and liver MRI abnormalities were similar between patients and controls. Patients with multiorgan abnormalities were older (difference in mean age 7 years [95% CI 4-10]; mean age of 59·8 years [SD 11·7] with multiorgan abnormalities vs mean age of 52·8 years [11·9] without multiorgan abnormalities; p<0·0001), more likely to have three or more comorbidities (OR 2·47 [1·32-4·82]; padjusted=0·0059), and more likely to have a more severe acute infection (acute CRP >5mg/L, OR 3·55 [1·23-11·88]; padjusted=0·025) than those without multiorgan abnormalities. Presence of lung MRI abnormalities was associated with a two-fold higher risk of chest tightness, and multiorgan MRI abnormalities were associated with severe and very severe persistent physical and mental health impairment (PHOSP-COVID symptom clusters) after hospitalisation. INTERPRETATION After hospitalisation for COVID-19, people are at risk of multiorgan abnormalities in the medium term. Our findings emphasise the need for proactive multidisciplinary care pathways, with the potential for imaging to guide surveillance frequency and therapeutic stratification. FUNDING UK Research and Innovation and National Institute for Health Research.
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Nadarajah R, Ludman P, Appelman Y, Brugaletta S, Budaj A, Bueno H, Huber K, Kunadian V, Leonardi S, Lettino M, Milasinovic D, Gale CP, Budaj A, Dagres N, Danchin N, Delgado V, Emberson J, Friberg O, Gale CP, Heyndrickx G, Iung B, James S, Kappetein AP, Maggioni AP, Maniadakis N, Nagy KV, Parati G, Petronio AS, Pietila M, Prescott E, Ruschitzka F, Van de Werf F, Weidinger F, Zeymer U, Gale CP, Beleslin B, Budaj A, Chioncel O, Dagres N, Danchin N, Emberson J, Erlinge D, Glikson M, Gray A, Kayikcioglu M, Maggioni AP, Nagy KV, Nedoshivin A, Petronio AP, Roos-Hesselink JW, Wallentin L, Zeymer U, Popescu BA, Adlam D, Caforio ALP, Capodanno D, Dweck M, Erlinge D, Glikson M, Hausleiter J, Iung B, Kayikcioglu M, Ludman P, Lund L, Maggioni AP, Matskeplishvili S, Meder B, Nagy KV, Nedoshivin A, Neglia D, Pasquet AA, Roos-Hesselink JW, Rossello FJ, Shaheen SM, Torbica A, Gale CP, Ludman PF, Lettino M, Bueno H, Huber K, Leonardi S, Budaj A, Milasinovic (Serbia) D, Brugaletta S, Appelman Y, Kunadian 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Potpara T, Marinkovic M, Mihajlovic M, Mujovic N, Kocijancic A, Mijatovic Z, Radovanovic M, Matic D, Milosevic A, Savic L, Subotic I, Uscumlic A, Zlatic N, Antonijevic J, Vesic O, Vucic R, Martinovic SS, Kostic T, Atanaskovic V, Mitic V, Stanojevic D, Petrovic M. Cohort profile: the ESC EURObservational Research Programme Non-ST-segment elevation myocardial infraction (NSTEMI) Registry. Eur Heart J Qual Care Clin Outcomes 2022; 9:8-15. [PMID: 36259751 DOI: 10.1093/ehjqcco/qcac067] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 11/12/2022]
Abstract
AIMS The European Society of Cardiology (ESC) EURObservational Research Programme (EORP) Non-ST-segment elevation myocardial infarction (NSTEMI) Registry aims to identify international patterns in NSTEMI management in clinical practice and outcomes against the 2015 ESC Guidelines for the management of acute coronary syndromes in patients presenting without ST-segment-elevation. METHODS AND RESULTS Consecutively hospitalised adult NSTEMI patients (n = 3620) were enrolled between 11 March 2019 and 6 March 2021, and individual patient data prospectively collected at 287 centres in 59 participating countries during a two-week enrolment period per centre. The registry collected data relating to baseline characteristics, major outcomes (in-hospital death, acute heart failure, cardiogenic shock, bleeding, stroke/transient ischaemic attack, and 30-day mortality) and guideline-recommended NSTEMI care interventions: electrocardiogram pre- or in-hospital, pre-hospitalization receipt of aspirin, echocardiography, coronary angiography, referral to cardiac rehabilitation, smoking cessation advice, dietary advice, and prescription on discharge of aspirin, P2Y12 inhibition, angiotensin converting enzyme inhibitor (ACEi)/angiotensin receptor blocker (ARB), beta-blocker, and statin. CONCLUSION The EORP NSTEMI Registry is an international, prospective registry of care and outcomes of patients treated for NSTEMI, which will provide unique insights into the contemporary management of hospitalised NSTEMI patients, compliance with ESC 2015 NSTEMI Guidelines, and identify potential barriers to optimal management of this common clinical presentation associated with significant morbidity and mortality.
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Affiliation(s)
- Ramesh Nadarajah
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, LS2 9JT Leeds, UK.,Leeds Institute of Data Analytics, University of Leeds, LS2 9JT Leeds, UK.,Department of Cardiology, Leeds Teaching Hospitals NHS Trust, LS1 3EX Leeds, UK
| | - Peter Ludman
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
| | - Yolande Appelman
- Department of Cardiology, Amsterdam UMC-Vrije Universiteit, Amsterdam Cardiovascular Sciences, Amsterdam, Netherlands
| | - Salvatore Brugaletta
- Hospital Clinic de Barcelona, Barcelona, Spain.,Institut d'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
| | - Andrzej Budaj
- Department of Cardiology, Center of Postgraduate Medical Education, Grochowski Hospital, Warsaw, Poland
| | - Hector Bueno
- Cardiology Department, Hospital Universitario 12 de Octubre and Instituto de Investigación Sanitaria Hospital 12 de Octubre (imas12), Madrid, Spain.,Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,Facultad de Medicina, Universidad Complutense de Madrid, Madrid, Spain
| | - Kurt Huber
- 3rd Medical Department, Cardiology and Intensive Care Medicine, Clinic Ottakring (Wilhelminenhospital), Vienna, Austria.,Medical Faculty, Sigmund Freud University, Vienna, Austria
| | - Vijay Kunadian
- Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK.,Cardiothoracic Centre, Freeman Hospital, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Sergio Leonardi
- University of Pavia, Pavia, Italy.,Fondazione IRCCS Policlinico S.Matteo, Pavia, Italy
| | - Maddalena Lettino
- Cardio-Thoracic and Vascular Department, San Gerardo Hospital, ASST-Monza, Monza, Italy
| | - Dejan Milasinovic
- Department of Cardiology, University Clinical Center of Serbia and Faculty of Medicine, University of Belgrade, Belgrade, Serbia
| | - Chris P Gale
- Leeds Institute for Cardiovascular and Metabolic Medicine, University of Leeds, LS2 9JT Leeds, UK.,Leeds Institute of Data Analytics, University of Leeds, LS2 9JT Leeds, UK.,Department of Cardiology, Leeds Teaching Hospitals NHS Trust, LS1 3EX Leeds, UK
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Evans RA, Leavy OC, Richardson M, Elneima O, McAuley HJC, Shikotra A, Singapuri A, Sereno M, Saunders RM, Harris VC, Houchen-Wolloff L, Aul R, Beirne P, Bolton CE, Brown JS, Choudhury G, Diar-Bakerly N, Easom N, Echevarria C, Fuld J, Hart N, Hurst J, Jones MG, Parekh D, Pfeffer P, Rahman NM, Rowland-Jones SL, Shah AM, Wootton DG, Chalder T, Davies MJ, De Soyza A, Geddes JR, Greenhalf W, Greening NJ, Heaney LG, Heller S, Howard LS, Jacob J, Jenkins RG, Lord JM, Man WDC, McCann GP, Neubauer S, Openshaw PJM, Porter JC, Rowland MJ, Scott JT, Semple MG, Singh SJ, Thomas DC, Toshner M, Lewis KE, Thwaites RS, Briggs A, Docherty AB, Kerr S, Lone NI, Quint J, Sheikh A, Thorpe M, Zheng B, Chalmers JD, Ho LP, Horsley A, Marks M, Poinasamy K, Raman B, Harrison EM, Wain LV, Brightling CE, Abel K, Adamali H, Adeloye D, Adeyemi O, Adrego R, Aguilar Jimenez LA, Ahmad S, Ahmad Haider N, Ahmed R, Ahwireng N, Ainsworth M, Al-Sheklly B, Alamoudi A, Ali M, Aljaroof M, All AM, Allan L, Allen RJ, Allerton L, 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K, Denneny E, Dennis J, Dewar A, Dharmagunawardena R, Dickens C, Dipper A, Diver S, Diwanji SN, Dixon M, Djukanovic R, Dobson H, Dobson SL, Donaldson A, Dong T, Dormand N, Dougherty A, Dowling R, Drain S, Draxlbauer K, Drury K, Dulawan P, Dunleavy A, Dunn S, Earley J, Edwards S, Edwardson C, El-Taweel H, Elliott A, Elliott K, Ellis Y, Elmer A, Evans D, Evans H, Evans J, Evans R, Evans RI, Evans T, Evenden C, Evison L, Fabbri L, Fairbairn S, Fairman A, Fallon K, Faluyi D, Favager C, Fayzan T, Featherstone J, Felton T, Finch J, Finney S, Finnigan J, Finnigan L, Fisher H, Fletcher S, Flockton R, Flynn M, Foot H, Foote D, Ford A, Forton D, Fraile E, Francis C, Francis R, Francis S, Frankel A, Fraser E, Free R, French N, Fu X, Furniss J, Garner L, Gautam N, George J, George P, Gibbons M, Gill M, Gilmour L, Gleeson F, Glossop J, Glover S, Goodman N, Goodwin C, Gooptu B, Gordon H, Gorsuch T, Greatorex M, Greenhaff PL, Greenhalgh A, Greenwood J, Gregory H, Gregory R, Grieve D, Griffin D, 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Qureshi H, Qureshi IN, Radhakrishnan K, Ralser M, Ramos A, Ramos H, Rangeley J, Rangelov B, Ratcliffe L, Ravencroft P, Reddington A, Reddy R, Redfearn H, Redwood D, Reed A, Rees M, Rees T, Regan K, Reynolds W, Ribeiro C, Richards A, Richardson E, Rivera-Ortega P, Roberts K, Robertson E, Robinson E, Robinson L, Roche L, Roddis C, Rodger J, Ross A, Ross G, Rossdale J, Rostron A, Rowe A, Rowland A, Rowland J, Roy K, Roy M, Rudan I, Russell R, Russell E, Saalmink G, Sabit R, Sage EK, Samakomva T, Samani N, Sampson C, Samuel K, Samuel R, Sanderson A, Sapey E, Saralaya D, Sargant J, Sarginson C, Sass T, Sattar N, Saunders K, Saunders P, Saunders LC, Savill H, Saxon W, Sayer A, Schronce J, Schwaeble W, Scott K, Selby N, Sewell TA, Shah K, Shah P, Shankar-Hari M, Sharma M, Sharpe C, Sharpe M, Shashaa S, Shaw A, Shaw K, Shaw V, Shelton S, Shenton L, Shevket K, Short J, Siddique S, Siddiqui S, Sidebottom J, Sigfrid L, Simons G, Simpson J, Simpson N, Singh C, Singh S, Sissons D, Skeemer J, Slack 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Vinson B, Wade E, Wade P, Wainwright T, Wajero LO, Walder S, Walker S, Walker S, Wall E, Wallis T, Walmsley S, Walsh JA, Walsh S, Warburton L, Ward TJC, Warwick K, Wassall H, Waterson S, Watson E, Watson L, Watson J, Welch C, Welch H, Welsh B, Wessely S, West S, Weston H, Wheeler H, White S, Whitehead V, Whitney J, Whittaker S, Whittam B, Whitworth V, Wight A, Wild J, Wilkins M, Wilkinson D, Williams N, Williams N, Williams J, Williams-Howard SA, Willicombe M, Willis G, Willoughby J, Wilson A, Wilson D, Wilson I, Window N, Witham M, Wolf-Roberts R, Wood C, Woodhead F, Woods J, Wormleighton J, Worsley J, Wraith D, Wrey Brown C, Wright C, Wright L, Wright S, Wyles J, Wynter I, Xu M, Yasmin N, Yasmin S, Yates T, Yip KP, Young B, Young S, Young A, Yousuf AJ, Zawia A, Zeidan L, Zhao B, Zongo O. Clinical characteristics with inflammation profiling of long COVID and association with 1-year recovery following hospitalisation in the UK: a prospective observational study. Lancet Respir Med 2022; 10:761-775. [PMID: 35472304 PMCID: PMC9034855 DOI: 10.1016/s2213-2600(22)00127-8] [Citation(s) in RCA: 144] [Impact Index Per Article: 72.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/23/2022] [Accepted: 03/31/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND No effective pharmacological or non-pharmacological interventions exist for patients with long COVID. We aimed to describe recovery 1 year after hospital discharge for COVID-19, identify factors associated with patient-perceived recovery, and identify potential therapeutic targets by describing the underlying inflammatory profiles of the previously described recovery clusters at 5 months after hospital discharge. METHODS The Post-hospitalisation COVID-19 study (PHOSP-COVID) is a prospective, longitudinal cohort study recruiting adults (aged ≥18 years) discharged from hospital with COVID-19 across the UK. Recovery was assessed using patient-reported outcome measures, physical performance, and organ function at 5 months and 1 year after hospital discharge, and stratified by both patient-perceived recovery and recovery cluster. Hierarchical logistic regression modelling was performed for patient-perceived recovery at 1 year. Cluster analysis was done using the clustering large applications k-medoids approach using clinical outcomes at 5 months. Inflammatory protein profiling was analysed from plasma at the 5-month visit. This study is registered on the ISRCTN Registry, ISRCTN10980107, and recruitment is ongoing. FINDINGS 2320 participants discharged from hospital between March 7, 2020, and April 18, 2021, were assessed at 5 months after discharge and 807 (32·7%) participants completed both the 5-month and 1-year visits. 279 (35·6%) of these 807 patients were women and 505 (64·4%) were men, with a mean age of 58·7 (SD 12·5) years, and 224 (27·8%) had received invasive mechanical ventilation (WHO class 7-9). The proportion of patients reporting full recovery was unchanged between 5 months (501 [25·5%] of 1965) and 1 year (232 [28·9%] of 804). Factors associated with being less likely to report full recovery at 1 year were female sex (odds ratio 0·68 [95% CI 0·46-0·99]), obesity (0·50 [0·34-0·74]) and invasive mechanical ventilation (0·42 [0·23-0·76]). Cluster analysis (n=1636) corroborated the previously reported four clusters: very severe, severe, moderate with cognitive impairment, and mild, relating to the severity of physical health, mental health, and cognitive impairment at 5 months. We found increased inflammatory mediators of tissue damage and repair in both the very severe and the moderate with cognitive impairment clusters compared with the mild cluster, including IL-6 concentration, which was increased in both comparisons (n=626 participants). We found a substantial deficit in median EQ-5D-5L utility index from before COVID-19 (retrospective assessment; 0·88 [IQR 0·74-1·00]), at 5 months (0·74 [0·64-0·88]) to 1 year (0·75 [0·62-0·88]), with minimal improvements across all outcome measures at 1 year after discharge in the whole cohort and within each of the four clusters. INTERPRETATION The sequelae of a hospital admission with COVID-19 were substantial 1 year after discharge across a range of health domains, with the minority in our cohort feeling fully recovered. Patient-perceived health-related quality of life was reduced at 1 year compared with before hospital admission. Systematic inflammation and obesity are potential treatable traits that warrant further investigation in clinical trials. FUNDING UK Research and Innovation and National Institute for Health Research.
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Elliott K, Berry JC, Kim H, Bart RS. A comparison of ImageJ and machine learning based image analysis methods to measure cassava bacterial blight disease severity. Plant Methods 2022; 18:86. [PMID: 35729628 PMCID: PMC9210806 DOI: 10.1186/s13007-022-00906-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 05/16/2022] [Indexed: 05/13/2023]
Abstract
BACKGROUND Methods to accurately quantify disease severity are fundamental to plant pathogen interaction studies. Commonly used methods include visual scoring of disease symptoms, tracking pathogen growth in planta over time, and various assays that detect plant defense responses. Several image-based methods for phenotyping of plant disease symptoms have also been developed. Each of these methods has different advantages and limitations which should be carefully considered when choosing an approach and interpreting the results. RESULTS In this paper, we developed two image analysis methods and tested their ability to quantify different aspects of disease lesions in the cassava-Xanthomonas pathosystem. The first method uses ImageJ, an open-source platform widely used in the biological sciences. The second method is a few-shot support vector machine learning tool that uses a classifier file trained with five representative infected leaf images for lesion recognition. Cassava leaves were syringe infiltrated with wildtype Xanthomonas, a Xanthomonas mutant with decreased virulence, and mock treatments. Digital images of infected leaves were captured overtime using a Raspberry Pi camera. The image analysis methods were analyzed and compared for the ability to segment the lesion from the background and accurately capture and measure differences between the treatment types. CONCLUSIONS Both image analysis methods presented in this paper allow for accurate segmentation of disease lesions from the non-infected plant. Specifically, at 4-, 6-, and 9-days post inoculation (DPI), both methods provided quantitative differences in disease symptoms between different treatment types. Thus, either method could be applied to extract information about disease severity. Strengths and weaknesses of each approach are discussed.
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Affiliation(s)
- Kiona Elliott
- Donald Danforth Plant Science Center, Saint Louis, MO, 63132, USA
- Division of Biological and Biomedical Sciences, Washington University in Saint Louis, St. Louis, MO, 63110, USA
| | - Jeffrey C Berry
- Donald Danforth Plant Science Center, Saint Louis, MO, 63132, USA
| | - Hobin Kim
- Army and Navy Academy, Carlsbad, CA, 92008, USA
| | - Rebecca S Bart
- Donald Danforth Plant Science Center, Saint Louis, MO, 63132, USA.
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Kim S, Buss N, Qiao C, Patel H, Yang L, Elliott K, Qian R, Ye L, Fiscella M, Danos O. DMD – ANIMAL MODELS. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Friesner J, Colón‐Carmona A, Schnoes AM, Stepanova A, Mason GA, Macintosh GC, Ullah H, Baxter I, Callis J, Sierra‐Cajas K, Elliott K, Haswell ES, Zavala ME, Wildermuth M, Williams M, Ayalew M, Henkhaus N, Prunet N, Lemaux PG, Yadegari R, Amasino R, Hangarter R, Innes R, Brady S, Long T, Woodford‐Thomas T, May V, Sun Y, Dinneny JR. Broadening the impact of plant science through innovative, integrative, and inclusive outreach. Plant Direct 2021; 5:e00316. [PMID: 33870032 PMCID: PMC8045900 DOI: 10.1002/pld3.316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/26/2021] [Accepted: 02/28/2021] [Indexed: 05/04/2023]
Abstract
Population growth and climate change will impact food security and potentially exacerbate the environmental toll that agriculture has taken on our planet. These existential concerns demand that a passionate, interdisciplinary, and diverse community of plant science professionals is trained during the 21st century. Furthermore, societal trends that question the importance of science and expert knowledge highlight the need to better communicate the value of rigorous fundamental scientific exploration. Engaging students and the general public in the wonder of plants, and science in general, requires renewed efforts that take advantage of advances in technology and new models of funding and knowledge dissemination. In November 2018, funded by the National Science Foundation through the Arabidopsis Research and Training for the 21st century (ART 21) research coordination network, a symposium and workshop were held that included a diverse panel of students, scientists, educators, and administrators from across the US. The purpose of the workshop was to re-envision how outreach programs are funded, evaluated, acknowledged, and shared within the plant science community. One key objective was to generate a roadmap for future efforts. We hope that this document will serve as such, by providing a comprehensive resource for students and young faculty interested in developing effective outreach programs. We also anticipate that this document will guide the formation of community partnerships to scale up currently successful outreach programs, and lead to the design of future programs that effectively engage with a more diverse student body and citizenry.
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Affiliation(s)
- Joanna Friesner
- UC Davis & North American Arabidopsis Steering CommitteeAtlantaGAUSA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Mary Williams
- American Society of Plant BiologistsGlasgowUnited Kingdom
| | | | | | | | | | | | | | | | | | | | - Terri Long
- North Carolina State UniversityDavisCAUSA
| | | | - Victoria May
- University of Washington in St LouisSt LouisMOUSA
| | - Ying Sun
- Stanford UniversityLas VegasNVUSA
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Harkess A, McLoughlin F, Bilkey N, Elliott K, Emenecker R, Mattoon E, Miller K, Czymmek K, Vierstra RD, Meyers BC, Michael TP. Improved Spirodela polyrhiza genome and proteomic analyses reveal a conserved chromosomal structure with high abundance of chloroplastic proteins favoring energy production. J Exp Bot 2021; 72:2491-2500. [PMID: 33454741 DOI: 10.1093/jxb/erab006] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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: 06/08/2020] [Accepted: 01/13/2021] [Indexed: 05/11/2023]
Abstract
Duckweeds are a monophyletic group of rapidly reproducing aquatic monocots in the Lemnaceae family. Given their clonal, exponentially fast reproduction, a key question is whether genome structure is conserved across the species in the absence of meiotic recombination. Here, we studied the genome and proteome of Spirodela polyrhiza, or greater duckweed, which has the largest body plan yet the smallest genome size in the family (1C=150 Mb). Using Oxford Nanopore sequencing combined with Hi-C scaffolding, we generated a highly contiguous, chromosome-scale assembly of S. polyrhiza line Sp7498 (Sp7498_HiC). Both the Sp7498_HiC and Sp9509 genome assemblies reveal large chromosomal misorientations relative to a recent PacBio assembly of Sp7498, highlighting the need for orthogonal long-range scaffolding techniques such as Hi-C and BioNano optical mapping. Shotgun proteomics of Sp7498 verified the expression of ~2250 proteins and revealed a high abundance of proteins involved in photosynthesis and carbohydrate metabolism among other functions. In addition, a strong increase in chloroplast proteins was observed that correlated to chloroplast density. This Sp7498_HiC genome was generated cheaply and quickly with a single Oxford Nanopore MinION flow cell and one Hi-C library in a classroom setting. Combining these data with a mass spectrometry-generated proteome illustrates the utility of duckweed as a model for genomics- and proteomics-based education.
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Affiliation(s)
- Alex Harkess
- Donald Danforth Plant Science Center, St Louis, MO, USA
| | | | - Natasha Bilkey
- Department of Biology, Washington University, St Louis, MO, USA
| | - Kiona Elliott
- Department of Biology, Washington University, St Louis, MO, USA
| | - Ryan Emenecker
- Department of Biology, Washington University, St Louis, MO, USA
| | - Erin Mattoon
- Department of Biology, Washington University, St Louis, MO, USA
| | - Kari Miller
- Department of Biology, Washington University, St Louis, MO, USA
| | - Kirk Czymmek
- Donald Danforth Plant Science Center, St Louis, MO, USA
| | | | - Blake C Meyers
- Donald Danforth Plant Science Center, St Louis, MO, USA
- Division of Plant Sciences, University of Missouri, Columbia, MO, USA
| | - Todd P Michael
- Department of Informatics, J. Craig Venter Institute (JCVI), San Diego, CA, USA
- The Plant Molecular and Cellular Biology Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, USA
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11
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Cole A, Abubakar-Waziri H, Purse S, Donsworth P, Macarthur E, Valerio C, Elliott K, Moonsie I, Callan-Kalthoff S, Bello C, Mangera Z. Introduction of Lung Cancer Patient Navigator at North Middlesex University Hospital (NMUH): how does it influence performance in meeting National Optimal Lung Cancer Pathway Times? Lung Cancer 2020. [DOI: 10.1016/s0169-5002(20)30205-1] [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: 10/25/2022]
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12
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Elliott K. Over-confidence in cardiac devices can create a barrier in engaging patients in advance care planning and discussions around device deactivation. Evid Based Nurs 2019; 23:16. [PMID: 31138562 DOI: 10.1136/ebnurs-2019-103102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2019] [Indexed: 11/04/2022]
Affiliation(s)
- K Elliott
- Department of Cardiology, Dorset County Hospital NHS Foundation Trust, Dorchester, UK
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Cosset É, Ilmjärv S, Dutoit V, Elliott K, von Schalscha T, Reiss A, Camargo M, Moroishi T, Seguin L, Gomez G, Moo J, Preynat-Seauve O, Krause K, Chneiweiss H, Guan K, Dietrich P, Weis S, Mischel P, Cheresh D. Glut3 addiction is a druggable vulnerability for a molecularly defined subpopulation of glioblastoma. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Bao Z, Clancy MA, Carvalho RF, Elliott K, Folta KM. Identification of Novel Growth Regulators in Plant Populations Expressing Random Peptides. Plant Physiol 2017; 175:619-627. [PMID: 28807931 PMCID: PMC5619883 DOI: 10.1104/pp.17.00577] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 08/09/2017] [Indexed: 05/08/2023]
Abstract
The use of chemical genomics approaches allows the identification of small molecules that integrate into biological systems, thereby changing discrete processes that influence growth, development, or metabolism. Libraries of chemicals are applied to living systems, and changes in phenotype are observed, potentially leading to the identification of new growth regulators. This work describes an approach that is the nexus of chemical genomics and synthetic biology. Here, each plant in an extensive population synthesizes a unique small peptide arising from a transgene composed of a randomized nucleic acid sequence core flanked by translational start, stop, and cysteine-encoding (for disulfide cyclization) sequences. Ten and 16 amino acid sequences, bearing a core of six and 12 random amino acids, have been synthesized in Arabidopsis (Arabidopsis thaliana) plants. Populations were screened for phenotypes from the seedling stage through senescence. Dozens of phenotypes were observed in over 2,000 plants analyzed. Ten conspicuous phenotypes were verified through separate transformation and analysis of multiple independent lines. The results indicate that these populations contain sequences that often influence discrete aspects of plant biology. Novel peptides that affect photosynthesis, flowering, and red light response are described. The challenge now is to identify the mechanistic integrations of these peptides into biochemical processes. These populations serve as a new tool to identify small molecules that modulate discrete plant functions that could be produced later in transgenic plants or potentially applied exogenously to impart their effects. These findings could usher in a new generation of agricultural growth regulators, herbicides, or defense compounds.
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Affiliation(s)
- Zhilong Bao
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Maureen A Clancy
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Raquel F Carvalho
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Kiona Elliott
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
| | - Kevin M Folta
- Horticultural Sciences Department, University of Florida, Gainesville, Florida 32611
- Graduate Program in Plant Molecular and Cellular Biology, University of Florida, Gainesville, Florida 32611
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Robinson A, Lea E, Elliott K, Annear M, Eccleston C, Doherty K. INTERDISCIPLINARY INNOVATION IN AGED CARE: THE WICKING TEACHING AGED CARE FACILITY PROGRAM. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A.L. Robinson
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - E. Lea
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - K. Elliott
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - M. Annear
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - C. Eccleston
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - K.V. Doherty
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
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Doherty K, Walters E, Tierney L, Elliott K, Annear M, Robinson A. TOWARD EFFECTIVE MANAGEMENT OF CHRONIC RESPIRATORY CONDITIONS IN RESIDENTIAL AGED CARE. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- K.V. Doherty
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - E.H. Walters
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - L. Tierney
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - K. Elliott
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - M. Annear
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - A.L. Robinson
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
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Goldberg L, Canty A, King A, Price A, Carr A, Ziebell J, Westbury J, Elliott K. CAN MATURE-AGE NONTRADITIONAL STUDENTS SUCCEED IN AN ONLINE BACHELOR OF DEMENTIA CARE PROGRAM? Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- L. Goldberg
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - A. Canty
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - A. King
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - A. Price
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - A. Carr
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - J. Ziebell
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - J. Westbury
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
| | - K. Elliott
- Wicking Dementia Research and Education Centre, University of Tasmania, Hobart, Tasmania, Australia
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Orpana H, Vachon J, Pearson C, Elliott K, Smith M, Branchard B. Correlates of well-being among Canadians with mood and/or anxiety disorders. Health Promot Chronic Dis Prev Can 2016; 36:302-313. [PMID: 27977085 PMCID: PMC5387797 DOI: 10.24095/hpcdp.36.12.04] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
INTRODUCTION Our objective was to examine variables associated with well-being as measured by high self-rated mental health (SRMH) and life satisfaction (LS), among Canadian adults (aged 18+) living with a mood and/or an anxiety disorder. METHODS We used nationally representative data from the 2014 Survey on Living with Chronic Diseases in Canada-Mood and Anxiety Disorders Component (SLCDC-MA) to describe the association between well-being and self-management behaviours (physical activity, sleep and meditation) as well as perceived stress, coping and social support. We used multivariate logistic regression to model the relationship between these factors and measures of well-being. RESULTS Approximately one in three individuals with mood and/or anxiety disorders reported high SRMH. The logistic regression models demonstrated that several characteristics such as being older, and reporting higher self-rated general health, fewer functional limitations, lower levels of perceived life stress, higher levels of perceived coping and higher levels of perceived social support were associated with higher levels of wellbeing. Self-management behaviours (including starting physical activity, meditation, adopting good sleep habits and attaining a certain number of hours of nightly sleep) were not significantly associated with measures of well-being in our multivariate model. CONCLUSION Canadian adults with mood and/or anxiety disorders who reported lower levels of perceived stress and higher levels of social support and coping were more likely to report high levels of well-being. This study contributes evidence from a representative population-based sample indicating well-being is achievable, even in the presence of a mood and/or an anxiety disorder.
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Affiliation(s)
- H Orpana
- Public Health Agency of Canada, Ottawa, Ontario, Canada
- School of Psychology, University of Ottawa, Ottawa, Ontario, Canada
| | - J Vachon
- Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - C Pearson
- Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - K Elliott
- School of Psychology, University of Ottawa, Ottawa, Ontario, Canada
| | - M Smith
- Manitoba Centre for Health Policy, Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - B Branchard
- Public Health Agency of Canada, Ottawa, Ontario, Canada
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Elliott K, Hamilton P, Maxwell P. Fluorescence (FISH) and chromogenic (CISH) in situ hybridisation in prostate carcinoma cell lines: comparison and use of virtual microscopy. Br J Biomed Sci 2016; 65:167-71. [DOI: 10.1080/09674845.2008.11732823] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- K. Elliott
- Department of Pathology, Belfast Health & Social Care Trust, Belfast
| | - P.W. Hamilton
- Centre for Cancer Research and Cell Biology, Queen’s University, Belfast
| | - P. Maxwell
- Department of Pathology, Belfast Health & Social Care Trust, Belfast
- Centre for Cancer Research and Cell Biology, Queen’s University, Belfast
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Duffner U, Abdel-Mageed A, Younge J, Tornga C, Scott K, Staddon J, Elliott K, Stumph J, Kidd P. The possible perils of targeted therapy. Leukemia 2016; 30:1619-21. [DOI: 10.1038/leu.2016.18] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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21
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Taghian AG, Skolny MN, O'Toole J, Miller CL, Jammallo LS, Horick N, Elliott K, Specht MC. Abstract OT2-5-01: The PREDICT study (prospective, randomized early detection and intervention after breast cancer - Treatment, for women at risk of lymphedema). Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-ot2-5-01] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction: It is well-documented that lymphedema is one of the most feared long-term side effects of breast cancer (BC) treatment. However, to date, a standardized approach for the quantification and treatment of breast cancer-related lymphedema (BCRL) has yet to be established.
Aims: We propose a screening and intervention trial to assess the efficacy of early detection and intervention with various treatment strategies for BCRL. Intervention comprises the use of compression garments for mild lymphedema and compression garments +/- nighttime bandaging for moderate lymphedema. Other factors to be evaluated include: symptom clusters, treatment adherence, fear avoidance behavior, quality of life (QOL), upper extremity function, and risk factors for BCRL.
Eligibility Criteria: Women 18 years + with a confirmed BC diagnosis, no history of BC, no known metastatic or locally advanced disease, no history of primary lymphedema, sentinel lymph node biopsy or axillary lymph node dissection as part of definitive breast surgery.
Study Design: A two-stage study which includes a Screening and an Intervention trial. The screening trial will evaluate arm volume change during and after BC treatment with target accrual of 8000. Currently, 1286 participants have been enrolled among three sites including MGH, MD Anderson and Brigham and Women's Hospital. Patients will undergo perometer measurements and complete the MGH Lymphedema Evaluation Following Treatment for Breast Cancer (LEFT-BC) survey at each screening assessment to evaluate changes in functionality, upper extremity utilization, fear avoidance behaviors, and QOL. Screening visits will occur pre- and post-operatively, at the conclusion of chemotherapy and/or radiation therapy and every 3-8 months thereafter. Patients will become eligible for intervention trial enrollment if, during the course of screening, unilaterally affected patients develop a relative arm volume change (RVC) of ≥ 5% or bilaterally affected patients develop a weight adjusted change (WAC) of ≥ 5% which persists at a verification measurement within 4-8 weeks. Eligible subjects will be enrolled into one of two groups based on verification RVC/WAC: Group I – Mild Lymphedema (5-10% RVC/WAC) or Group II – Moderate Lymphedema (11-20% RVC/WAC). Subjects are then randomized within each group. Group I subjects are randomized to one of two arms: I-A – Observation, I-B – Compression, and Group II subjects are randomized to one of two arms: II-A – Compression, II-B – Compression + Night Compression Bandaging. Target accrual for the intervention trial is 336 subjects (Group I: 208, Group II: 128).
Clinical Relevance: The results of this study will yield Level I evidence on the effectiveness of early detection and intervention for BCRL. Findings may shape clinical practice in diagnosis and treatment, as well as provide insight regarding the risk factors, symptoms, upper extremity function, and QOL associated with BCRL.*Funding by award #s R01CA139118 &3P5OCA089393, AGT.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr OT2-5-01.
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Affiliation(s)
- AG Taghian
- Massachusetts General Hospital, Boston, MA
| | - MN Skolny
- Massachusetts General Hospital, Boston, MA
| | - J O'Toole
- Massachusetts General Hospital, Boston, MA
| | - CL Miller
- Massachusetts General Hospital, Boston, MA
| | | | - N Horick
- Massachusetts General Hospital, Boston, MA
| | - K Elliott
- Massachusetts General Hospital, Boston, MA
| | - MC Specht
- Massachusetts General Hospital, Boston, MA
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22
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Shalhoub J, Elliott K, Tran T. A 'homemade' snare for endovascular procedures. Ann R Coll Surg Engl 2012. [PMID: 22943245 PMCID: PMC3954392 DOI: 10.1308/003588412x13373405385214l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- J Shalhoub
- North West London Hospitals NHS Trust, UK.
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Shalhoub J, Elliott K, Tran T. A ‘homemade’ snare for endovascular procedures. Ann R Coll Surg Engl 2012; 94:366-7. [DOI: 10.1308/rcsann.2012.94.5.366a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- J Shalhoub
- North West London Hospitals NHS Trust,UK
| | - K Elliott
- North West London Hospitals NHS Trust,UK
| | - T Tran
- North West London Hospitals NHS Trust,UK
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Mehta V, Griem KL, Haile KL, Stevens R, Syzek L, Elliott K. Six month follow up on a series of patients treated with an electronic brachytherapy technique for intracavitary accelerated partial breast irradiation. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-5149] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #5149
Purpose: Phase IV prospective post market study to evaluate the safety and device performance of electronic brachytherapy treatment using the Xoft Axxent System as adjuvant therapy for early stage breast cancer.
 Methods and Materials: 44 patients were enrolled between April 2007 and March 2008, and 13 patients have completed 6 months of follow up to date. Patients were eligible if they were older than 50 years, had completely resected DCIS (<2.0cm) or invasive ductal carcinoma (<2.0cm), and microscopic surgical margins of at least 1mm. The balloon applicator was placed in a closed cavity and a balloon surface to skin distance of at least 7mm was required for treatment. The radiation treatment (RT) consisted of delivering 3.4 Gy/fraction twice a day for 10 total fractions. The primary endpoint was the successful delivery of the prescribed RT. Secondary endpoint was adverse device related events.
 Results: Thirteen of the forty-four patients that were enrolled and treated on this study have been followed a minimum of 6 months. The three month follow-up included cosmesis evaluation using the Harvard Cosmesis Scale, and adverse events. The three month cosmesis evaluated by physicians' showed 100% of the patients rated with excellent to good cosmesis. Related adverse events reported through three months included a total of fifteen CTC v3 Grade One AEs. Events included erythema, itching, induration, skin firmness, rash/ desquamation, fatigue. Of these events 90% were resolved. The six month cosmesis physician evaluations showed 82% of the patients had excellent to good cosmesis. Twelve of the 13 patients rated the appearance of their breast, in addition to the physician assessment, and 12 out of 12 rated their appearance good to excellent, one patient did not select any rating. Adverse events reported at six months were a total of three new CTC v3 Grade One. These AEs included occurrences of induration, skin firmness, and hyperpigmentation. A patient satisfaction survey at 6 months follow-up was completed by the patients. Certain survey questions required an answer using a scale of 0-6 for the ratings, where six was the best score. The patients' mean overall rating of satisfaction with the study participation was 5.55 out of 6 (min 3, max 6), satisfied with the radiation treatment was rated 5.54 out of 6 (min 3, max 6). All 13 patients, 100%, stated they would recommend this treatment to a friend.
 Conclusion: This report provides an early look at the experience of using electronic brachytherapy as a means for intracavitary partial breast radiotherapy. The first cohort has reached a minimum of 6 months of follow up and the results appear promising. Additional patient follow up will be presented at the meeting.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 5149.
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Affiliation(s)
- V Mehta
- 1 Radiation Oncology, Swedish Cancer Institute, Seattle, WA
| | | | - KL Haile
- 3 Wellstar Health System, Marietta, GA
| | - R Stevens
- 4 Dickstein Cancer Center, White Plains, NY
| | - L Syzek
- 5 University of Oklahoma Health Sciences Center, Oklahoma City, OK
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25
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Fitzpatrick E, Johnson MP, Dyer TD, Forrest S, Elliott K, Blangero J, Brennecke SP, Moses EK. Genetic association of the activin A receptor gene (ACVR2A) and pre-eclampsia. Mol Hum Reprod 2009; 15:195-204. [PMID: 19126782 DOI: 10.1093/molehr/gap001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Pre-eclampsia is a common serious disorder of human pregnancy, which is associated with significant maternal and perinatal morbidity and mortality. The suspected aetiology of pre-eclampsia is complex, with susceptibility being attributable to multiple environmental factors and a large genetic component. Recently, we reported significant linkage to chromosome 2q22 in 34 Australian/New Zealand (Aust/NZ) pre-eclampsia/eclampsia families, and activin A receptor type IIA (ACVR2A) was identified as a strong positional candidate gene at this locus. In an attempt to identify the putative risk variants, we have now comprehensively re-sequenced the entire coding region of the ACVR2A gene and the conserved non-coding sequences in a subset of 16 individuals from these families. We identified 45 single nucleotide polymorphisms (SNPs), with 9 being novel. These SNPs were genotyped in our total family sample of 480 individuals from 74 Aust/NZ pre-eclampsia families (including the original 34 genome-scanned families). Our best associations between ACVR2A polymorphisms and pre-eclampsia were for rs10497025 (P = 0.025), rs13430086 (P = 0.010) and three novel SNPs: LF004, LF013 and LF020 (all with P = 0.018). After correction for multiple hypothesis testing, none of these associations reached significance (P > 0.05). Based on these data, it remains unclear what role, if any, ACVR2A polymorphisms play in pre-eclampsia risk, at least in these Australian families. However, it would be premature to rule out this gene as significant associations between ACVR2A SNPs and pre-eclampsia have recently been reported in a large Norwegian (HUNT) population sample.
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Affiliation(s)
- E Fitzpatrick
- Department of Perinatal Medicine and University of Melbourne Department of Obstetrics and Gynaecology, The Royal Women's Hospital, Parkville, Australia
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Maung K, Storey S, McKay J, Bigley A, Heathcote D, Elliott K, Valentin JP, Hammond T, Redfern W. Validation of an OptoMotry system for measurement of visual acuity in Han Wistar rats. J Pharmacol Toxicol Methods 2008. [DOI: 10.1016/j.vascn.2008.05.029] [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: 10/21/2022]
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Moses EK, Fitzpatrick E, Freed KA, Dyer TD, Forrest S, Elliott K, Johnson MP, Blangero J, Brennecke SP. Objective prioritization of positional candidate genes at a quantitative trait locus for pre-eclampsia on 2q22. Mol Hum Reprod 2006; 12:505-12. [PMID: 16809377 DOI: 10.1093/molehr/gal056] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Pre-eclampsia/eclampsia (PE/E) is a common, serious medical disorder of human pregnancy. Familial association of PE/E has been recognized for decades, but the genetics are complex and poorly understood. In an attempt to identify PE/E susceptibility genes, we embarked on a positional cloning strategy using 34 Australian and New Zealand PE/E pedigrees. An initial 10-cM resolution genome scan revealed a putative susceptibility locus spanning a broad region on chromosome 2 that overlaps an independently determined linkage signal seen in Icelandic PE pedigrees. Subsequent fine mapping using 25 additional short tandem repeat (STR) markers in this region and non-parametric multipoint linkage analysis did not change the overall position. Under a strict diagnosis of PE, we obtained significant evidence of linkage on 2q with a peak log-of-odds ratio score (LOD) of 3.43 near marker D2S151 at 155 cM. To prioritize positional candidate genes at the 2q locus for detailed analysis, we applied an objective prioritization strategy that integrates quantitative bioinformatics, assessment of differential gene expression and association analysis of single-nucleotide polymorphisms (SNPs). Highest priority was assigned to the activin receptor gene ACVR2. This gene also showed >10-fold differential gene expression in human decidual tissue from normotensive and PE individuals. We genotyped five known SNPs in this gene in our pedigrees and performed tests for association and linkage disequilibrium. One SNP (rs1424954) showed strong preliminary evidence of association with PE (P = 0.007), whereas two others (rs1364658 and rs1895694) exhibited nominal evidence (P < 0.05). Haplotype analysis revealed no additional association information. There was evidence of weak linkage disequilibrium among these SNPs. The highest observed LD occurred between the two strongest associated SNPs, suggesting that the observed signals may be the signature of an observed functional variant.
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Affiliation(s)
- E K Moses
- Department of Genetics, Southwest Foundation for Biomedical Research, San Antonio, TX 78227-5301, USA.
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Murray C, McAlister C, Elliott K. Use of fluorescence in situ hybridisation and laser microdissection to isolate male non-sperm cells in cases of sexual assault. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.ics.2005.09.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Walder K, Kerr-Bayles L, Civitarese A, Jowett J, Curran J, Elliott K, Trevaskis J, Bishara N, Zimmet P, Mandarino L, Ravussin E, Blangero J, Kissebah A, Collier GR. The mitochondrial rhomboid protease PSARL is a new candidate gene for type 2 diabetes. Diabetologia 2005; 48:459-68. [PMID: 15729572 DOI: 10.1007/s00125-005-1675-9] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2004] [Accepted: 10/04/2004] [Indexed: 01/06/2023]
Abstract
AIMS/HYPOTHESIS This study aimed to identify genes that are expressed in skeletal muscle, encode proteins with functional significance in mitochondria, and are associated with type 2 diabetes. METHODS We screened for differentially expressed genes in skeletal muscle of Psammomys obesus (Israeli sand rats), and prioritised these on the basis of genomic localisation and bioinformatics analysis for proteins with likely mitochondrial functions. RESULTS We identified a mitochondrial intramembrane protease, known as presenilins-associated rhomboid-like protein (PSARL) that is associated with insulin resistance and type 2 diabetes. Expression of PSARL was reduced in skeletal muscle of diabetic Psammomys obesus, and restored after exercise training to successfully treat the diabetes. PSARL gene expression in human skeletal muscle was correlated with insulin sensitivity as assessed by glucose disposal during a hyperinsulinaemic-euglycaemic clamp. In 1,031 human subjects, an amino acid substitution (Leu262Val) in PSARL was associated with increased plasma insulin concentration, a key risk factor for diabetes. Furthermore, this variant interacted strongly with age to affect insulin levels, accounting for 5% of the variation in plasma insulin in elderly subjects. CONCLUSIONS/INTERPRETATION Variation in PSARL sequence and/or expression may be an important new risk factor for type 2 diabetes and other components of the metabolic syndrome.
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Affiliation(s)
- K Walder
- Metabolic Research Unit, School of Health Sciences, Deakin University, Pigdons Road, Waurn Ponds, 3217, Australia
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30
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de Silva MG, Elliott K, Dahl HH, Fitzpatrick E, Wilcox S, Delatycki M, Williamson R, Efron D, Lynch M, Forrest S. Disruption of a novel member of a sodium/hydrogen exchanger family and DOCK3 is associated with an attention deficit hyperactivity disorder-like phenotype. J Med Genet 2003; 40:733-40. [PMID: 14569117 PMCID: PMC1735283 DOI: 10.1136/jmg.40.10.733] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.6] [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: 11/03/2022]
Abstract
BACKGROUND Attention deficit hyperactivity disorder (ADHD) is a complex condition with high heritability. However, both biochemical investigations and association and linkage studies have failed to define fully the underlying genetic factors associated with ADHD. We have identified a family co-segregating an early onset behavioural/developmental condition, with features of ADHD and intellectual disability, with a pericentric inversion of chromosome 3, 46N inv(3)(p14:q21). METHODS We hypothesised that the inversion breakpoints affect a gene or genes that cause the observed phenotype. Large genomic clones (P1 derived/yeast/bacterial artificial chromosomes) were assembled into contigs across the two inversion breakpoints using molecular and bioinformatic technologies. Restriction fragments crossing the junctions were identified by Southern analysis and these fragments were amplified using inverse PCR. RESULTS The amplification products were subsequently sequenced to reveal that the breakpoints lay within an intron of the dedicator of cytokinesis 3 (DOCK3) gene at the p arm breakpoint, and an intron of a novel member of the solute carrier family 9 (sodium/hydrogen exchanger) isoform 9 (SLC9A9) at the q arm. Both genes are expressed in the brain, but neither of the genes has previously been implicated in developmental or behavioural disorders. CONCLUSION These two disrupted genes are candidates for involvement in the pathway leading to the neuropsychological condition in this family.
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Affiliation(s)
- M G de Silva
- Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, Victoria, Australia.
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31
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Elliott K, Hill DS, Lambert C, Burroughes TR, Gill P. Use of laser microdissection greatly improves the recovery of DNA from sperm on microscope slides. Forensic Sci Int 2003; 137:28-36. [PMID: 14550610 DOI: 10.1016/s0379-0738(03)00267-6] [Citation(s) in RCA: 108] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traditionally, sperms are isolated from vaginal cell mixtures by preferential extraction methods. Although these methods work well when there is a reasonable amount of DNA present, they are problematic when there are limited amounts (ca. 250 pg). In particular, the analysis of sperm from microscope slides has proven difficult. Here, we describe the use of laser capture microdissection (LM) for the isolation of spermatozoa from microscope slides containing sperms and vaginal cells. Such slides are frequently an important source of evidential material during the forensic investigation of rape and other sexual assaults. Low copy number (LCN) PCR was used to compare profiles of sperm DNA prepared using LM and preferential lysis. LM was found to outperform preferential lysis in 15 out of 16 samples. The application of LM to the processing of actual casework slides, and in particular the potential use of LM for the analysis of old cases, is discussed. Finally, 77 post-coital slides were processed in order to accurately assess the robustness of the technique. There was a significant association between the quality of the male profile recovered and time since intercourse that was independent of the number of sperms analysed, suggesting that the DNA was degraded even though the spermhead was intact.
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Affiliation(s)
- K Elliott
- Research and Development, The Forensic Science Service, Trident Court, Solihull Parkway, Birmingham Business Park, SolihullB37 7YN, UK.
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32
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Hanfrey C, Franceschetti M, Mayer MJ, Illingworth C, Elliott K, Collier M, Thompson B, Perry B, Michael AJ. Translational regulation of the plant S-adenosylmethionine decarboxylase. Biochem Soc Trans 2003; 31:424-7. [PMID: 12653652 DOI: 10.1042/bst0310424] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [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: 11/17/2022]
Abstract
It is becoming apparent that control of protein synthesis by metabolites is more common than previously thought. Much of that control is exerted at the level of initiation of mRNA translation, orchestrated by upstream open reading frames (uORFs) and RNA secondary structure. S-Adenosylmethionine decarboxylase (AdoMetDC) is a key enzyme in polyamine biosynthesis and both mammalian and plant AdoMetDCs are translationally regulated by uORFs in response to polyamine levels by distinct mechanisms.
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Affiliation(s)
- C Hanfrey
- Division of Food Safety Science, Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, U.K
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Elliott K, Fitzpatrick E, Hill D, Brown J, Adams S, Chee P, Stewart G, Fulcher D, Tang M, Kemp A, King E, Varigos G, Bahlo M, Forrest S. The -590C/T and -34C/T interleukin-4 promoter polymorphisms are not associated with atopic eczema in childhood. J Allergy Clin Immunol 2001; 108:285-7. [PMID: 11496248 DOI: 10.1067/mai.2001.117180] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Susceptibility to the development of asthma and other atopic diseases is known to have a genetic component. To date, several studies have linked chromosome 5q31 to asthma and atopy in human beings. This region harbors a cluster of cytokine and growth factor genes, IL-4 presenting as a prime atopy candidate gene, inasmuch as it plays a pivotal role in the atopy pathway. Our approach was to identify polymorphisms within the promoter regions of IL-4 and test their association with atopic eczema. Polymorphisms were typed in a cohort of 76 small nuclear families and 25 triads with childhood atopic eczema. The genotypes were used to test for linkage in the presence of association with atopic eczema. A new polymorphism, -34C/T, was identified and studied with a known polymorphism, -590C/T. On its own, each polymorphism showed no association with atopic eczema. The 2 polymorphisms were used to generate haplotypes, and a significant result was found for the -590C/-34C haplotype. However, after Bonferroni correction for multiple testing, the association became nonsignificant. Neither polymorphism predisposes to early-onset atopic eczema by itself, but suggestive linkage was found for the -590C/-34C haplotype in this study.
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Affiliation(s)
- K Elliott
- Murdoch Childrens Research Institute, Parkville, Victoria, Australia
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Abstract
Histamine shifts TH1/TH2 cytokine balance from TH1 to TH2 cytokines. The phosphorylation of STAT factors and their translocation to nucleus are important steps in the regulation of TH1/TH2 cytokine balance. This study was designed to investigate the effects of histamine on Janus kinases-signal transducers and activators of transcription (JAK-STAT) pathway. The splenocytes were treated with histamine in the presence or absence of JAK-STAT inhibitor, tyrphostin, activated with IFNgamma for 30 min, and phosphorylated STAT1 was detected by immunoblotting. We found that histamine up-regulated the phosphorylation of STATI and tyrphostin prevented this phosphorylation. We then studied the effects of tyrphostin on histamine-mediated inhibition of IFNgamma production and histamine-mediated stimulation of IL-5 and IL-10 production. Tyrphostin dose-dependently reversed the effects of histamine on IFNgamma, IL-5 and IL-10 production, as evident by ELISA. These observations suggest that histamine regulated JAK-STAT signal transduction, which is involved in cytokine secretion.
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Affiliation(s)
- N Osna
- Department of Pharmaceutical and Administrative Sciences, Creighton University, Omaha, NE 68178, USA
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Parra S, Laurent F, Subra G, Deleuze-Masquefa C, Benezech V, Fabreguettes J, Vidal J, Pocock T, Elliott K, Small R, Escale R, Michel A, Chapat J, Bonnet P. Imidazo[1,2-a]quinoxalines: synthesis and cyclic nucleotide phosphodiesterase inhibitory activity. Eur J Med Chem 2001; 36:255-64. [PMID: 11337104 DOI: 10.1016/s0223-5234(01)01213-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 10/27/2022]
Abstract
A group of imidazo[1,2-a]quinoxalines have been synthesised from quinoxaline by condensation of an appropriate haloester or intramolecular cyclisation of a keto moiety on an intracyclic nitrogen atom. The reactivity of the heterocycle was explored through diverse reactions such as electrophilic substitution, lithiation and halogen-metal exchange to give access to a new series of derivatives. Confirmation of their structure was mainly performed by NMR, after careful assignment of the signals in comparison to previous attributions made on the parent imidazo[1,2-a]quinoxaline and discussion of available data in the literature. The cyclic nucleotide phosphodiesterase inhibitor activity of some of these derivatives has been assessed on isoenzymes type III and type lV. Compound 15, 4-(methylamino)imidazo[1,2-a]quinoxaline-2-carbonitrile, exhibited potent relaxant activity on smooth muscle, with a potency similar to the one measured with SCA 40, its structural analogue in the imidazo[1,2-a]pyrazine series.
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Affiliation(s)
- S Parra
- Pharmacochimie & Biomolécules, EA 2414, Laboratoire de Chimie Organique, Faculté de Pharmacie, 15 Avenue Charles Flahault, 34060 Cedex 2, Montpellier, France
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Elliott K. Implementing nursing clinical indicators. Prof Nurse 2001; 16:1158-61. [PMID: 12029963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Clinical indicators state desirable patient outcomes using evidence-based targets. Locally based indicators give professional staff ownership of the process of audit, and the programme can be adapted to the local circumstances.
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Affiliation(s)
- K Elliott
- Barnsley District General Hospital NHS Trust, Barnsley
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Abstract
Histamine regulates the immune response by enhancing TH2 cytokine production and by inhibiting TH1 cytokine production. We assessed the mechanisms of histamine's action on helper T cell subsets by evaluating the role of protein kinase A (PKA) in the histamine-mediated effects on IFN gamma production. The splenocytes and TH1 murine cloned cells (pGL10) were pretreated with histamine at a concentration range of 10(-8)-10(-5) M for 1 h and then were activated with anti-CD3, PHA, PMA + ionomycin, or ionomycin for 24 h. The levels of IFN gamma were measured in the supernatants by ELISA. The inhibitory effects of histamine were the most prominent in anti-CD3-stimulated splenocytes (61%). The effects of histamine on IFN gamma production from TH1 cells depended on the mode of cell activation. The activation of cells with anti-CD3 resulted in 27% inhibition of IFN gamma production whereas the activation with ionomycin produced 70% suppression. The inhibitory effects of histamine were completely reversed by cimetidine in a dose-dependent manner in both TH1 cells and in splenocytes. PKA played a role in the inhibition of IFN gamma by histamine when the cells were activated via TCR, and the PKA inhibitors Rp-cAMPS (10(-5) M) and H8 (10(-5) M) reversed the inhibitory effects of histamine on IFN gamma production. However, when the cells were stimulated with ionomycin, the PKA inhibitors did not affect histamine-mediated suppression of IFN gamma production.
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Affiliation(s)
- N Osna
- Department of Pharmaceutical and Administrative Sciences, Creighton University, Omaha, NE, 68178, USA
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Abstract
Interleukin-10 is a potent suppressive factor that down-regulates cellular immune response via inhibition of the production of TH1 cytokines. Histamine shifts the TH1/TH2 balance from TH1 to TH2 cytokines making the effects of histamine on IL-10 secretion an important factor in this switch. This study was designed to assess the role of histamine in the regulation of IL-10 production and the involvement of PKA and STAT factors in this process. TH2 cells (D10.G4.1) and AKR/j splenocytes were pretreated with histamine at a concentration range of 10(-8)-10(-5) M for 1 h and then activated with PMA + ionomycin or anti-CD3 for 24 h. The supernatants were collected and tested for IL-10 content by ELISA. Histamine stimulated IL-10 production in TH2 cells in a dose-dependent manner that was reversed by both H1- and H2-receptor antagonists and by PKA inhibitors H8 and Rp-cAMPS. Tyrphostin also reversed the stimulation of IL-10 secretion by histamine, indicating that STAT factors were involved in this process. The up-regulation of IL-10 production by histamine in splenocytes was accompanied by inhibitory effects of histamine on IFN gamma production. The pretreatment of splenocytes with histamine in the presence of anti-IL-10 abrogated histamine-mediated inhibition of IFN gamma production suggesting that the effects of histamine on IFN gamma secretion were regulated by IL-10 in multi-cell system.
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Affiliation(s)
- N Osna
- Department of Pharmaceutical and Administrative Sciences, Creighton University, Omaha, NE 68178, USA
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Elliott K. Are U.S. women interested in long-acting methods? Fam Plann Perspect 2000; 32:306. [PMID: 11138869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Abstract
Cell death processes are progressively inactivated during malignant development, in part by loss of tumor suppressors that can promote cell death. The Bin1 gene encodes a nucleocytosolic adaptor protein with tumor suppressor properties, initially identified through its ability to interact with and inhibit malignant transformation by c-Myc and other oncogenes. Bin1 is frequently missing or functionally inactivated in breast and prostate cancers and in melanoma. In this study, we show that Bin1 engages a caspase-independent cell death process similar to type II apoptosis, characterized by cell shrinkage, substratum detachment, vacuolated cytoplasm, and DNA degradation. Cell death induction was relieved by mutation of the BAR domain, a putative effector domain, or by a missplicing event that occurs in melanoma and inactivates suppressor activity. Cells in all phases of the cell cycle were susceptible to death and p53 and Rb were dispensable. Notably, Bin1 did not activate caspases and the broad spectrum caspase inhibitor ZVAD.fmk did not block cell death. Consistent with the lack of caspase involvement, dying cells lacked nucleosomal DNA cleavage and nuclear lamina degradation. Moreover, neither Bcl-2 or dominant inhibition of the Fas pathway had any effect. In previous work, we showed that Bin1 could not suppress cell transformation by SV40 large T antigen. Consistent with this finding, we observed that T antigen suppressed the death program engaged by Bin1. This observation was interesting in light of emerging evidence that T antigen has roles in cell immortalization and human cell transformation beyond Rb and p53 inactivation. In support of a link to c-Myc-induced death processes, AEBSF, a serine protease inhibitor that inhibits apoptosis by c-Myc, potently suppressed DNA degradation by Bin1. Our findings suggest that the tumor suppressor activity of Bin1 reflects engagement of a unique cell death program. We propose that loss of Bin1 may promote malignancy by blunting death penalties associated with oncogene activation.
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Affiliation(s)
- K Elliott
- The Wistar Institute, Philadelphia, PA, USA
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41
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Abstract
Cardiac troponin I (cTnI) is the inhibitory component of the troponin complex and is involved in the calcium control of heart muscle contraction. Recently, specific missense mutations of the cTnI gene (TNNI3) have been shown to cause familial hypertrophic cardiomyopathy (HCM). We have analyzed the functional effects of two HCM mutations (R145G and R162W) using purified recombinant cTnI. Both mutations gave reduced inhibition of actin-tropomyosin-activated myosin ATPase, both in experiments using cTnI alone and in those using reconstituted human cardiac troponin under relaxing conditions. Both mutant troponin complexes also conferred increased calcium sensitivity of ATPase regulation. Studies on wild type/R145G mutant mixtures showed that the wild type phenotype was dominant in that the inhibition and the calcium sensitivity conferred by a 50:50 mixture was more similar to wild type than expected. Surface plasmon resonance-based assays showed that R162W mutant had an increased affinity for troponin C in the presence of calcium. This observation may contribute to the increased calcium sensitivity found with this mutant and also corroborates recent structural data. The observed decreased inhibition and increased calcium sensitivity suggest that these mutations may cause HCM via impaired relaxation rather than the impaired contraction seen with some other classes of HCM mutants.
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Affiliation(s)
- K Elliott
- Department of Cardiovascular Medicine, University of Oxford, John Radcliffe Hospital, Oxford OX3 9DU, United Kingdom
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Redwood C, Lohmann K, Bing W, Esposito GM, Elliott K, Abdulrazzak H, Knott A, Purcell I, Marston S, Watkins H. Investigation of a truncated cardiac troponin T that causes familial hypertrophic cardiomyopathy: Ca(2+) regulatory properties of reconstituted thin filaments depend on the ratio of mutant to wild-type protein. Circ Res 2000; 86:1146-52. [PMID: 10850966 DOI: 10.1161/01.res.86.11.1146] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Familial hypertrophic cardiomyopathy (HCM) is caused by mutations in at least 8 contractile protein genes, most commonly beta myosin heavy chain, myosin binding protein C, and cardiac troponin T. Affected individuals are heterozygous for a particular mutation, and most evidence suggests that the mutant protein acts in a dominant-negative fashion. To investigate the functional properties of a truncated troponin T shown to cause HCM, both wild-type and mutant human cardiac troponin T were overexpressed in Escherichia coli, purified, and combined with human cardiac troponins I and C to reconstitute human cardiac troponin. Significant differences were found between the regulatory properties of wild-type and mutant troponin in vitro, as follows. (1) In actin-tropomyosin-activated myosin ATPase assays at pCa 9, wild-type troponin caused 80% inhibition of ATPase, whereas the mutant complex gave negligible inhibition. (2) Similarly, in the in vitro motility assay, mutant troponin failed to decrease both the proportion of actin-tropomyosin filaments motile and the velocity of motile filaments at pCa 9. (3) At pCa 5, the addition of mutant complex caused a greater increase (21.7%) in velocity of actin-tropomyosin filaments than wild-type troponin (12.3%). These data suggest that the truncated troponin T prevents switching off of the thin filament at low Ca(2+). However, the study of thin filaments containing varying ratios of wild-type and mutant troponin T at low Ca(2+) indicated an opposite effect of mutant troponin, causing enhancement of the inhibitory effect of wild-type complex, when it is present in a low ratio (10% to 50%). These multiple effects need to be taken into account to explain the physiological consequences of this mutation in HCM. Further, these findings underscore the importance of studying mixed mutant:wild-type preparations to faithfully model this autosomal-dominant disease.
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Affiliation(s)
- C Redwood
- Department of Cardiovascular Medicine, University of Oxford, John Radcliffe Hospital, Oxford, UK.
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Elliott K, Stephenson TJ, Messenger AG. Differences in hair follicle dermal papilla volume are due to extracellular matrix volume and cell number: implications for the control of hair follicle size and androgen responses. J Invest Dermatol 1999; 113:873-7. [PMID: 10594724 DOI: 10.1046/j.1523-1747.1999.00797.x] [Citation(s) in RCA: 157] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The size of a hair follicle is thought to be determined by the volume of its dermal papilla. The volume of the dermal papilla depends on the number of cells it contains and on the volume of the extracellular matrix. To establish which of these two variables is related to differences in hair follicle size we performed a stereologic study on 235 hair follicles from different sites, including male facial skin (beard), female facial skin, and scalp. In facial follicles there was a strong correlation between the area of the hair cortex and the volume of the dermal papilla. The area of the hair cortex also correlated with the number of cells in the dermal papilla and with the volume of dermal papilla per cell. In scalp hair follicles, where there was a smaller range of sizes, the correlations between these variables were weaker. In large male facial follicles the mean total dermal papilla volume was almost 40-fold higher than in vellus follicles from female facial skin. This difference was associated with a mean 17-fold greater number of cells in the dermal papilla and a 2.4-fold greater volume associated with each cell. Intermediate results were obtained in scalp follicles. In many regions of the skin hair follicles enlarge in response to androgens during adult life hair. Our results imply that the increase in the volume of the dermal papilla in these follicles is due to an increase in the number of cells, either through proliferation or through the migration of cells from the follicular dermal sheath, and to an increase in the amount of extracellular matrix per cell. As androgens are thought to act primarily on the dermal papilla, these changes may have a direct bearing on the mechanism of androgen-mediated alterations in hair follicle size.
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Affiliation(s)
- K Elliott
- Department of Dermatology, Royal Hallamshire Hospital, Sheffield, UK
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Forrest S, Dunn K, Elliott K, Fitzpatrick E, Fullerton J, McCarthy M, Brown J, Hill D, Williamson R. Identifying genes predisposing to atopic eczema. J Allergy Clin Immunol 1999; 104:1066-70. [PMID: 10550754 DOI: 10.1016/s0091-6749(99)70090-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.0] [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: 10/25/2022]
Abstract
BACKGROUND Genetic and environmental factors are known to play a role in the development of atopic diseases, such as asthma, eczema, and rhinitis. However, the atopy gene (or genes) has yet to be defined. Studies of familial asthma have identified several regions that may contain genes predisposing to atopy, but the data for candidate regions do not show agreement, which may be due to heterogeneity, ascertainment bias, or stochastic factors. Factors such as an early age of onset, a positive family history, and a clearly defined phenotype favor a genetic origin and improve the chance of identifying genes that predispose to atopy. OBJECTIVE We sought to define genes that predispose to the development of atopic eczema. METHODS We have studied nuclear families with multiple cases of early-onset atopic eczema for involvement of the candidate regions on chromosomes 5q31 (IL gene cluster), 11q13 (high-affinity FCepsilon receptor), 14q11.2 (mast cell chymase), and 16p12 (IL-4 receptor alpha-chain, IL4RA gene). RESULTS Using a recessive model, we find a maximum parametric log of the odds of linkage score of 2. 25 and nonparametric score of 2.54 (P =.006) for a region on chromosome 5q31, which we postulate contains a gene predisposing to atopic eczema, but lack of support for linkage to 11q13. Transmission disequilibrium tests do not support an association with candidate polymorphisms in the mast cell chymase and IL4RA genes. CONCLUSION We have identified a clinically homogeneous cohort of patients with atopic eczema to identify genetic factors predisposing to the development of atopy. We postulate that there are certain loci that predispose to atopy in general and other loci that determine which of the atopic phenotypes is expressed.
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MESH Headings
- Adolescent
- Child
- Child, Preschool
- Chromosomes, Human, Pair 11
- Chromosomes, Human, Pair 14
- Chromosomes, Human, Pair 5
- Cytokines/genetics
- Dermatitis, Atopic/genetics
- Female
- Genetic Linkage
- Genetic Predisposition to Disease/genetics
- Humans
- Infant
- Male
- Microsatellite Repeats
- Pedigree
- Receptors, IgE/genetics
- Receptors, Interleukin-4/genetics
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Affiliation(s)
- S Forrest
- Murdoch Institute for Research into Birth Defects, Parkville, Victoria, Australia
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Wright G, Elliott K, Wilkie C, Cuschieri RJ, Bittiner B, Hughes KB. A prospective audit of hospital-acquired deep vein thrombosis and pulmonary embolism. Int J Clin Pract 1999; 53:497-504. [PMID: 10692733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Abstract
The incidence of symptomatic deep vein thrombosis and pulmonary embolism acquired in hospital was studied, and the effectiveness of current thromboprophylaxis was assessed in an open study of 8648 admissions to the Doncaster Royal Infirmary between April and July 1994. On admission, all patients were assessed for their likely risk of thromboembolic problems according to THRIFT criteria. Treatment, prophylaxis, complications and outcome were recorded on discharge. A high risk sub-group was followed up for up to 42 days after discharge. The overall rate of clinically apparent hospital-acquired thromboembolic complications was 0.4% (n = 35). The rate of clinically apparent thromboembolic disease in the high risk group was 2.1% (n = 17). The incidence of thromboembolic problems appeared not to be reduce by prophylaxis apparently even when stratified by risk group. These findings suggest that thromboembolic complications may be less common than would be expected from published literature. Thromboprophylaxis as currently practised within our institution does not seem to affect the incidence of deep vein thrombosis or pulmonary embolism, and these results would appear to argue against a 'blanket' policy for pharmacological thromboprophylaxis.
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Affiliation(s)
- G Wright
- Doncaster Royal Infirmary, South Yorkshire, UK
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Duhadaway J, Rowe F, Elliott K, Mao NC, Prendergast GC. Bau, a splice form of Neurabin-I that interacts with the tumor suppressor Bin1, inhibits malignant cell transformation. Cell Adhes Commun 1999; 7:99-110. [PMID: 10427963 DOI: 10.3109/15419069909034394] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Bin1 is a nucleocytoplasmic adaptor protein and tumor suppressor. A novel protein termed Bau was identified through its ability to interact with a region of Bin1 required to inhibit malignant cell transformation by certain oncogenes. Bau is a splice form of Neurabin-I, one of two related F-actin-binding proteins that are proposed to link cadherin-based cell-cell adhesion sites with the growth regulatory kinase p70S6K. Bau lacks actin- and p70S6K-binding domains found in Neurabin-I but includes coiled-coil domains that are part of its central domain as well as additional sequences not found in Neurabin-I. Interaction with Bin1 requires the presence of the U3 region which is alternately spliced in muscle cells. Bau localizes to the nucleus and cytosol. Like Bin1, Bau can suppress oncogene-mediated transformation and inhibit tumor cell growth. We suggest that Bau may link Bin1 to the Neurabin-I/p70S6K system in muscle and other cells, perhaps providing a mechanism to influence adhesion-dependent signals which affect cell fate.
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Affiliation(s)
- J Duhadaway
- The Wistar Institute, Philadelphia, PA 19104-4268, USA
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Elliott K, Sakamuro D, Basu A, Du W, Wunner W, Staller P, Gaubatz S, Zhang H, Prochownik E, Eilers M, Prendergast GC. Bin1 functionally interacts with Myc and inhibits cell proliferation via multiple mechanisms. Oncogene 1999; 18:3564-73. [PMID: 10380878 DOI: 10.1038/sj.onc.1202670] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.6] [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: 11/08/2022]
Abstract
The tumor suppressor Bin1 was identified through its interaction with the N-terminal region of Myc which harbors its transcriptional activation domain. Here we show that Bin1 and Myc physically and functionally associate in cells and that Bin1 inhibits cell proliferation through both Myc-dependent and Myc-independent mechanisms. Bin1 specifically inhibited transactivation by Myc as assayed from artificial promoters or from the Myc target genes ornithine decarboxylase (ODC) and alpha prothymosin (pT). Inhibition of ODC but not pT required the presence of the Myc binding domain (MBD) of Bin1 suggesting two mechanisms of action. Consistent with this possibility, a non-MBD region of Bin1 was sufficient to recruit a repression function to DNA that was unrelated to histone deacetylase. Regions outside the MBD required for growth inhibition were mapped in Ras cotransformation or HepG2 hepatoma cell growth assays. Bin1 required the N-terminal BAR domain to suppress focus formation by Myc whereas the C-terminal U1 and SH3 domains were required to inhibit adenovirus E1A or mutant p53, respectively. All three domains contributed to Bin1 suppression of tumor cell growth but BAR-C was most crucial. These findings supported functional interaction between Myc and Bin1 in cells and indicated that Bin1 could inhibit malignant cell growth through multiple mechanisms.
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Affiliation(s)
- K Elliott
- The Wistar Institute, Philadelphia, Pennsylvania 19104, USA
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Inserra P, Zhang Z, Ardestani SK, Araghi-Niknam M, Liang B, Jiang S, Shaw D, Molitor M, Elliott K, Watson RR. Modulation of cytokine production by dehydroepiandrosterone (DHEA) plus melatonin (MLT) supplementation of old mice. Proc Soc Exp Biol Med 1998; 218:76-82. [PMID: 9572155 DOI: 10.3181/00379727-218-44270] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Tissue levels of the antioxidants melatonin (MLT) and dehydroepiandrosterone (DHEA) decline with age, and this decline is correlated with immune dysfunction. The aim of the current study is to determine whether hormone supplementation with MLT and DHEA together would synergize to reverse immune senescence. Old (16.5 months) female C57BL/6 mice were treated with DHEA, MLT, or DHEA + MLT. As expected, splenocytes were significantly (P < 0.05) higher in old mice as compared to young mice. DHEA, MLT, and DHEA + MLT significantly (P < 0.005) increased B cell proliferation in young mice. However, only MLT and DHEA + MLT significantly (P < 0.05) increased B cell proliferation in old mice. DHEA, MLT, and DHEA + MLT help to regulate immune function in aged female C57BL/6 mice by significantly (P < 0.05) increasing Th1 cytokines, IL-2, and IFN-gamma or significantly (P < 0.05) decreasing Th2 cytokines, IL-6, and IL-10, thus regulating cytokine production. DHEA and MLT effectively modulate suppressed Th1 cytokine and elevated Th2 cytokine production; however, their combined use produced only a limited additive effect.
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Affiliation(s)
- P Inserra
- Arizona Prevention Center, University of Arizona, Tucson 87524, USA
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Abstract
An association was investigated between changing infant feeding practices and a declining incidence of childhood coeliac disease and transient gluten intolerance (TGI) in West Somerset, England during 1971-92. Dietary histories of 18 patients with coeliac disease were compared with 23 controls during 1971-80 and eight patients with coeliac disease and 39 controls during 1981-92. Our findings showed that the declining incidence of coeliac disease and TGI were associated with changing infant feeding practices, characterised by the later introduction of dietary gluten, an increased use of baby rice and gluten free foods for weaning, and an increased incidence of initial breast feeding.
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Affiliation(s)
- D N Challacombe
- Somerset Children's Research Unit, Taunton and Somerset Hospital
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