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Semenikhina M, Fedoriuk M, Stefanenko M, Klemens CA, Cherezova A, Marshall B, Hall G, Levchenko V, Solanki AK, Lipschutz JH, Ilatovskaya DV, Staruschenko A, Palygin O. β-Arrestin pathway activation by selective ATR1 agonism promotes calcium influx in podocytes, leading to glomerular damage. Clin Sci (Lond) 2023; 137:1789-1804. [PMID: 38051199 DOI: 10.1042/cs20230313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 10/24/2023] [Accepted: 12/05/2023] [Indexed: 12/07/2023]
Abstract
Angiotensin receptor blockers (ARBs) are the first-line treatment for hypertension; they act by inhibiting signaling through the angiotensin 1 receptor (AT1R). Recently, a novel biased AT1R agonist, TRV120027 (TRV), which selectively activates the β-arrestin cascade and blocks the G-protein-coupled receptor pathway has been proposed as a potential blood pressure medication. Here, we explored the effects of TRV and associated β-arrestin signaling in podocytes, essential cells of the kidney filter. We used human podocyte cell lines to determine β-arrestin's involvement in calcium signaling and cytoskeletal reorganization and Dahl SS rats to investigate the chronic effects of TRV administration on glomerular health. Our experiments indicate that the TRV-activated β-arrestin pathway promotes the rapid elevation of intracellular Ca2+ in a dose-dependent manner. Interestingly, the amplitude of β-arrestin-mediated Ca2+ influx was significantly higher than the response to similar Ang II concentrations. Single-channel analyses show rapid activation of transient receptor potential canonical (TRPC) channels following acute TRV application. Furthermore, the pharmacological blockade of TRPC6 significantly attenuated the β-arrestin-mediated Ca2+ influx. Additionally, prolonged activation of the β-arrestin pathway in podocytes resulted in pathological actin cytoskeleton rearrangements, higher apoptotic cell markers, and augmented glomerular damage. TRV-activated β-arrestin signaling in podocytes may promote TRPC6 channel-mediated Ca2+ influx, foot process effacement, and apoptosis, possibly leading to severe defects in glomerular filtration barrier integrity and kidney health. Under these circumstances, the potential therapeutic application of TRV for hypertension treatment requires further investigation to assess the balance of the benefits versus possible deleterious effects and off-target damage.
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Affiliation(s)
- Marharyta Semenikhina
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, U.S.A
| | - Mykhailo Fedoriuk
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, U.S.A
| | - Mariia Stefanenko
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, U.S.A
| | - Christine A Klemens
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL, U.S.A
- Hypertension and Kidney Research Center, University of South Florida, Tampa, FL, U.S.A
| | - Alena Cherezova
- Department of Physiology, Medical College of Georgia, Augusta University, GA, U.S.A
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, GA, U.S.A
| | - Gentzon Hall
- Division of Nephrology, Department of Internal Medicine, Duke University School of Medicine, Durham, NC, U.S.A
- Duke Molecular Physiology Institute, Duke University, Durham, NC, U.S.A
| | - Vladislav Levchenko
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL, U.S.A
| | - Ashish K Solanki
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, U.S.A
| | - Joshua H Lipschutz
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, U.S.A
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC, U.S.A
| | - Daria V Ilatovskaya
- Department of Physiology, Medical College of Georgia, Augusta University, GA, U.S.A
| | - Alexander Staruschenko
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL, U.S.A
- Hypertension and Kidney Research Center, University of South Florida, Tampa, FL, U.S.A
- James A. Haley Veterans' Hospital, Tampa, FL, U.S.A
| | - Oleg Palygin
- Department of Medicine, Division of Nephrology, Medical University of South Carolina, Charleston, SC, U.S.A
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC, U.S.A
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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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McLarnon SR, Johnson C, Sun J, Wei Q, Csanyi G, O'Herron P, Marshall B, Giddens P, Sullivan JC, Barrett A, O'Connor PM. Extravasation of Blood and Blood Toxicity Drives Tubular Injury from RBC Trapping in Ischemic AKI. Function (Oxf) 2023; 4:zqad050. [PMID: 37753180 PMCID: PMC10519276 DOI: 10.1093/function/zqad050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/04/2023] [Accepted: 08/24/2023] [Indexed: 09/28/2023] Open
Abstract
Red blood cell (RBC) trapping is common in ischemic acute kidney injury (AKI) and presents as densely packed RBCs that accumulate within and engorge the kidney medullary circulation. In this study, we tested the hypothesis that "RBC trapping directly promotes tubular injury independent of extending ischemia time." Studies were performed on rats. Red blood cell congestion and tubular injury were compared between renal arterial clamping, venous clamping, and venous clamping of blood-free kidneys. Vessels were occluded for either 15 or 45 min with and without reperfusion. We found that RBC trapping in the medullary capillaries occurred rapidly following reperfusion from renal arterial clamping and that this was associated with extravasation of blood from congested vessels, uptake of blood proteins by the tubules, and marked tubular injury. To determine if this injury was due to blood toxicity or an extension of ischemia time, we compared renal venous and arterial clamping without reperfusion. Venous clamping resulted in RBC trapping and marked tubular injury within 45 min of ischemia. Conversely, despite the same ischemia time, RBC trapping and tubular injury were minimal following arterial clamping without reperfusion. Confirming the role of blood toward tubular injury, injury was markedly reduced in blood-free kidneys with venous clamping. Our data demonstrate that RBC trapping results in the rapid extravasation and uptake of blood components by tubular cells, causing toxic tubular injury. Tubular toxicity from extravasation of blood following RBC trapping appears to be a major component of tubular injury in ischemic AKI, which has not previously been recognized.
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Affiliation(s)
- Sarah R McLarnon
- Department of Physiology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
- Department of Cell Biology and Physiology, School of Medicine, University of North Carolina, 27599, Chapel Hill, NC, USA
| | - Chloe Johnson
- Department of Physiology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Jingping Sun
- Department of Physiology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Qingqing Wei
- Department of Anatomy and Cell Biology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Gabor Csanyi
- Department of Pharmacology and Toxicology, Augusta University, 30912, Augusta, GA, USA
| | - Phillip O'Herron
- Department of Physiology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Brendan Marshall
- Department of Anatomy and Cell Biology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Priya Giddens
- Department of Physiology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Jennifer C Sullivan
- Department of Physiology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Amanda Barrett
- Department of Pathology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
| | - Paul M O'Connor
- Department of Physiology, Medical College of Georgia, Augusta University, 30912, Augusta, GA, USA
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Jarpe-Ratner E, Bloedel A, Little D, DiPaolo M, Belcher K, Mangiaracina M, Marshall B. Evaluation of a Mandatory Professional Development on Supporting Transgender, Nonbinary, and Gender-Nonconforming Students in Chicago Public Schools. Health Promot Pract 2023:15248399231182161. [PMID: 37366650 DOI: 10.1177/15248399231182161] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
To address the reality that LGBTQ+ (lesbian, gay, bisexual, transgender, queer, intersex, asexual, and others) students remain more likely to experience harm, harassment, and violence at school as well as miss school due to feeling unsafe and the fact that students identifying as transgender, nonbinary, and gender-nonconforming (TNBGNC) are at even greater risk of bullying, harassment, and significant mental health concerns, Chicago Public Schools' (CPS) Office of Student Health and Wellness (OSHW) created a novel professional development (PD) requirement in 2019, entitled "Supporting Transgender, Nonbinary, and Gender Nonconforming Students." The PD, a recorded webinar encouraging independent time for reflection and planning, takes an intersectional approach and is required of all CPS staff members across the entire district. A pre- and postevaluation of the PD, guided by the Kirkpatrick model, was completed by 19,503 staff members. The findings from this evaluation show that staff members significantly increased their knowledge, showed statistically significant gain in self-reported skills, and articulated key actions they could take toward sustaining an environment that fosters skill implementation and culture change more broadly. Findings reveal that a culture that supports staff members in learning from their mistakes can help to encourage staff members to employ gender-inclusive behaviors such as asking individuals for their pronouns and using gender-neutral pronouns. This districtwide mandatory PD approach shows value in influencing staff members' thinking and behaviors known to be supportive of TNBGNC students and may serve as a model for other school districts looking to build capacity to support TNBGNC students.
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Affiliation(s)
| | - A Bloedel
- Northwestern University, Chicago, IL, USA
| | - D Little
- Chicago Public Schools, Chicago, IL, USA
| | - M DiPaolo
- Chicago Public Schools, Chicago, IL, USA
| | - K Belcher
- University of Illinois at Chicago, Chicago, IL, USA
| | | | - B Marshall
- Chicago Public Schools, Chicago, IL, USA
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Barwick SR, Xiao H, Wolff D, Wang J, Perry E, Marshall B, Smith SB. Sigma 1 receptor activation improves retinal structure and function in the Rho P23H/+ mouse model of autosomal dominant retinitis pigmentosa. Exp Eye Res 2023; 230:109462. [PMID: 37003581 PMCID: PMC10155485 DOI: 10.1016/j.exer.2023.109462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/17/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
Retinitis pigmentosa (RP) is a group of devastating inherited retinal diseases that leads to visual impairment and oftentimes complete blindness. Currently no cure exists for RP thus research into prolonging vision is imperative. Sigma 1 receptor (Sig1R) is a promising small molecule target that has neuroprotective benefits in retinas of rapidly-degenerating mouse models. It is not clear whether Sig1R activation can provide similar neuroprotective benefits in more slowly-progressing RP models. Here, we examined Sig1R-mediated effects in the slowly-progressing RhoP23H/+ mouse, a model of autosomal dominant RP. We characterized the retinal degeneration of the RhoP23H/+ mouse over a 10 month period using three in vivo methods: Optomotor Response (OMR), Electroretinogram (ERG), and Spectral Domain-Optical Coherence Tomography (SD-OCT). A slow retinal degeneration was observed in both male and female RhoP23H/+ mice when compared to wild type. The OMR, which reflects visual acuity, showed a gradual decline through 10 months. Interestingly, female mice had more reduction in visual acuity than males. ERG assessment showed a gradual decline in scotopic and photopic responses in RhoP23H/+ mice. To investigate the neuroprotective benefits of Sig1R activation in the RhoP23H/+ mouse model, mutant mice were treated with a high-specificity Sig1R ligand (+)-pentazocine ((+)-PTZ) 3x/week at 0.5 mg/kg and examined using OMR, ERG, SD-OCT. A significant retention of visual function was observed in males and females at 10 months of age, with treated females retaining ∼50% greater visual acuity than non-treated mutant females. ERG revealed significant retention of scotopic and photopic b-wave amplitudes at 6 months in male and female RhoP23H/+ mice treated with (+)-PTZ. Further, in vivo analysis by SD-OCT revealed a significant retention of outer nuclear layer (ONL) thickness in male and female treated RhoP23H/+ mice. Histological studies showed significant retention of IS/OS length (∼50%), ONL thickness, and number of rows of photoreceptor cell nuclei at 6 months in (+)-PTZ-treated mutant mice. Interestingly, electron microscopy revealed preservation of OS discs in (+)-PTZ treated mutant mice compared to non-treated. Taken collectively, the in vivo and in vitro data provide the first evidence that targeting Sig1R can rescue visual function and structure in the RhoP23H/+ mouse. These results are promising and provide a framework for future studies to investigate Sig1R as a potential therapeutic target in retinal degenerative disease.
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Affiliation(s)
- Shannon R Barwick
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA; James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA.
| | - Haiyan Xiao
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA; James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA
| | - David Wolff
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Jing Wang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA; James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA
| | - Elizabeth Perry
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Sylvia B Smith
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA; James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA; Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, GA, USA
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Teng PY, Choi J, Yadav S, Marshall B, Castro FLS, Ferrel J, Kim WK. Evaluation of a dacitic (rhyolitic) tuff breccia use on performance, inflammatory, and antioxidant responses in broilers mildly challenged with Eimeria spp. Poult Sci 2023; 102:102697. [PMID: 37141812 DOI: 10.1016/j.psj.2023.102697] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 05/06/2023] Open
Abstract
The objective of the study was to investigate the effects of a dacitic tuff breccia (DTB) on Eimeria-infected broilers. A total of 600 one-day-old Cobb 500 male chickens were randomly assigned to 5 treatments with 10 replicates of 12 birds. Treatments were: an unchallenged control (UC), a challenged (CC) control (0% DTB), and 3 challenged groups with 0.125, 0.25, or 0.5% DTB. At d 14, birds in the CC and DTB groups were orally gavaged with mixed Eimeria spp., while the UC received water. Growth performance was evaluated during prechallenge, challenge, and postchallenge periods (0-14 d; 14-20 d; and 20-26 d, respectively). Gastrointestinal permeability was measured at 5 days postinfection (dpi). Intestinal histology and nutrient digestibility of dry matter (DM), crude protein (CP), and ileal digestible energy (IDE) were measured at 6 dpi. Liver activity of glutathione peroxidase (GSH-Px) was determined at 6 dpi, and concentrations of reduced (GSH) and oxidized glutathione (GSSG) were analyzed at 6 and 12 dpi. Data were analyzed using a linear mixed model analysis and Tukey's test (P ≤ 0.05). From 0 to 14 d, similar average daily gain (ADG) and average daily feed intake (ADFI, P > 0.05) were observed. Gain:feed ratio (GF) was higher in 0.125, 0.25, and 0.5% of DTB than the CC and UC (P < 0.001). From 14 to 20 d, the UC had the highest ADG, ADFI, and GF (P < 0.001). At 5 dpi, intestinal permeability was higher in the challenged groups than the UC. Additionally, the UC showed the highest apparent ileal digestibility of CP, whereas 0.125% DTB had higher CP digestibility than the CC and 0.5% DTB (P < 0.001). At 6 dpi, 0.125% DTB increased GSH-Px activity compared to the CC, 0.5% DTB, and UC (P < 0.001). At 12 dpi, 0.125% DTB showed increased GSH concentration compared to the CC, 0.25% DTB, and 0.5% DTB (P < 0.01). The mild coccidia infection negatively impacted growth performance, apparent ileal nutrient digestibility, intestinal histology, and gastrointestinal integrity in broilers. The use of 0.125% DTB exhibited potential in improving antioxidant responses, apparent ileal digestibility of CP, and growth performance.
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Affiliation(s)
- P-Y Teng
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - J Choi
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - S Yadav
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - B Marshall
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA
| | - F L S Castro
- AZOMITE Mineral Products Inc., Nephi, UT 84648, USA
| | - J Ferrel
- AZOMITE Mineral Products Inc., Nephi, UT 84648, USA
| | - W K Kim
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA.
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Freedman A, Elhelf I, Wu H, Bowers H, Marshall B, White J, Sharkawi M, Arora V. Abstract No. 66 Pulmonary Embolus: Light and Electron Microscopy May Change Treatment Algorithms. J Vasc Interv Radiol 2023. [DOI: 10.1016/j.jvir.2022.12.111] [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: 02/26/2023] Open
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8
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Zhang X, Xu J, Marshall B, Dong Z, Liu Y, Espinosa-Heidmann DG, Zhang M. Transcriptome Analysis of Retinal and Choroidal Pathologies in Aged BALB/c Mice Following Systemic Neonatal Murine Cytomegalovirus Infection. Int J Mol Sci 2023; 24:4322. [PMID: 36901754 PMCID: PMC10001583 DOI: 10.3390/ijms24054322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 02/24/2023] Open
Abstract
Our previous studies have shown that systemic neonatal murine cytomegalovirus (MCMV) infection of BALB/c mice spread to the eye with subsequent establishment of latency in choroid/RPE. In this study, RNA sequencing (RNA-Seq) analysis was used to determine the molecular genetic changes and pathways affected by ocular MCMV latency. MCMV (50 pfu per mouse) or medium as control were injected intra-peritoneally (i.p.) into BALB/c mice at <3 days after birth. At 18 months post injection, the mice were euthanized, and the eyes were collected and prepared for RNA-Seq. Compared to three uninfected control eyes, we identified 321 differentially expressed genes (DEGs) in six infected eyes. Using the QIAGEN Ingenuity Pathway Analysis (QIAGEN IPA), we identified 17 affected canonical pathways, 10 of which function in neuroretinal signaling, with the majority of DEGs being downregulated, while 7 pathways function in upregulated immune/inflammatory responses. Retinal and epithelial cell death pathways involving both apoptosis and necroptosis were also activated. MCMV ocular latency is associated with upregulation of immune and inflammatory responses and downregulation of multiple neuroretinal signaling pathways. Cell death signaling pathways are also activated and contribute to the degeneration of photoreceptors, RPE, and choroidal capillaries.
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Affiliation(s)
- Xinyan Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Jinxian Xu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Zheng Dong
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Charlie Norwood VA Medical Center, Augusta, GA 30904, USA
| | - Yutao Liu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Diego G. Espinosa-Heidmann
- James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- Department of Ophthamology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Ming Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
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Ostrenga J, Cromwell E, Todd J, Faro A, Brown W, Marshall B, Willis A, Dieni O. 361 Distribution and cost of common cystic fibrosis prescription drugs using claims data. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)01051-7] [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: 11/05/2022]
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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, Allsop L, Almeida P, Altmann D, Alvarez Corral M, Amoils S, Anderson D, Antoniades C, Arbane G, Arias A, Armour C, Armstrong L, Armstrong N, Arnold D, Arnold H, Ashish A, Ashworth A, Ashworth M, Aslani S, Assefa-Kebede H, Atkin C, Atkin P, Aung H, Austin L, Avram C, Ayoub A, Babores M, Baggott R, Bagshaw J, Baguley D, Bailey L, Baillie JK, Bain S, Bakali M, Bakau M, Baldry E, Baldwin D, Ballard C, Banerjee A, Bang B, Barker RE, Barman L, Barratt S, Barrett F, Basire D, Basu N, Bates M, Bates A, Batterham R, Baxendale H, Bayes H, Beadsworth M, Beckett P, Beggs M, Begum M, Bell D, Bell R, Bennett K, Beranova E, Bermperi A, Berridge A, Berry C, Betts S, Bevan E, Bhui K, Bingham M, Birchall K, Bishop L, Bisnauthsing K, Blaikely J, Bloss A, Bolger A, Bonnington J, Botkai A, Bourne C, Bourne M, Bramham K, Brear L, Breen G, Breeze J, Bright E, Brill S, Brindle K, Broad L, Broadley A, Brookes C, Broome M, Brown A, Brown A, Brown J, Brown J, Brown M, Brown M, Brown V, Brugha T, Brunskill N, Buch M, Buckley P, Bularga A, Bullmore E, Burden L, Burdett T, Burn D, Burns G, Burns A, Busby J, Butcher R, Butt A, Byrne S, Cairns P, Calder PC, Calvelo E, Carborn H, Card B, Carr C, Carr L, Carson G, Carter P, Casey A, Cassar M, Cavanagh J, Chablani M, Chambers RC, Chan F, Channon KM, Chapman K, Charalambou A, Chaudhuri N, Checkley A, Chen J, Cheng Y, Chetham L, Childs C, Chilvers ER, Chinoy H, Chiribiri A, Chong-James K, Choudhury N, Chowienczyk P, Christie C, Chrystal M, Clark D, Clark C, Clarke J, Clohisey S, Coakley G, Coburn Z, Coetzee S, Cole J, Coleman C, Conneh F, Connell D, Connolly B, Connor L, Cook A, Cooper B, Cooper J, Cooper S, Copeland D, Cosier T, Coulding M, Coupland C, Cox E, Craig T, Crisp P, Cristiano D, Crooks MG, Cross A, Cruz I, Cullinan P, Cuthbertson D, Daines L, Dalton M, Daly P, Daniels A, Dark P, Dasgin J, David A, David C, Davies E, Davies F, Davies G, Davies GA, Davies K, Dawson J, Daynes E, Deakin B, Deans A, Deas C, Deery J, Defres S, Dell A, Dempsey 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, Griffiths L, Guerdette AM, Guillen Guio B, Gummadi M, Gupta A, Gurram S, Guthrie E, Guy Z, H Henson H, Hadley K, Haggar A, Hainey K, Hairsine B, Haldar P, Hall I, Hall L, Halling-Brown M, Hamil R, Hancock A, Hancock K, Hanley NA, Haq S, Hardwick HE, Hardy E, Hardy T, Hargadon B, Harrington K, Harris E, Harrison P, Harvey A, Harvey M, Harvie M, Haslam L, Havinden-Williams M, Hawkes J, Hawkings N, Haworth J, Hayday A, Haynes M, Hazeldine J, Hazelton T, Heeley C, Heeney JL, Heightman M, Henderson M, Hesselden L, Hewitt M, Highett V, Hillman T, Hiwot T, Hoare A, Hoare M, Hockridge J, Hogarth P, Holbourn A, Holden S, Holdsworth L, Holgate D, Holland M, Holloway L, Holmes K, Holmes M, Holroyd-Hind B, Holt L, Hormis A, Hosseini A, Hotopf M, Howard K, Howell A, Hufton E, Hughes AD, Hughes J, Hughes R, Humphries A, Huneke N, Hurditch E, Husain M, Hussell T, Hutchinson J, Ibrahim W, Ilyas F, Ingham J, Ingram L, Ionita D, Isaacs K, Ismail K, Jackson T, James WY, Jarman C, Jarrold I, Jarvis H, Jastrub R, Jayaraman B, Jezzard P, Jiwa K, Johnson C, Johnson S, Johnston D, Jolley CJ, Jones D, Jones G, Jones H, Jones H, Jones I, Jones L, Jones S, Jose S, Kabir T, Kaltsakas G, Kamwa V, Kanellakis N, Kaprowska S, Kausar Z, Keenan N, Kelly S, Kemp G, Kerslake H, Key AL, Khan F, Khunti K, Kilroy S, King B, King C, Kingham L, Kirk J, Kitterick P, Klenerman P, Knibbs L, Knight S, Knighton A, Kon O, Kon S, Kon SS, Koprowska S, Korszun A, Koychev I, Kurasz C, Kurupati P, Laing C, Lamlum H, Landers G, Langenberg C, Lasserson D, Lavelle-Langham L, Lawrie A, Lawson C, Lawson C, Layton A, Lea A, Lee D, Lee JH, Lee E, Leitch K, Lenagh R, Lewis D, Lewis J, Lewis V, Lewis-Burke N, Li X, Light T, Lightstone L, Lilaonitkul W, Lim L, Linford S, Lingford-Hughes A, Lipman M, Liyanage K, Lloyd A, Logan S, Lomas D, Loosley R, Lota H, Lovegrove W, Lucey A, Lukaschuk E, Lye A, Lynch C, MacDonald S, MacGowan G, Macharia I, Mackie J, Macliver L, Madathil S, Madzamba G, Magee N, Magtoto MM, Mairs N, Majeed N, Major E, Malein F, Malim M, Mallison G, Mandal S, Mangion K, Manisty C, Manley R, March K, Marciniak S, Marino P, Mariveles M, Marouzet E, Marsh S, Marshall B, Marshall M, Martin J, Martineau A, Martinez LM, Maskell N, Matila D, Matimba-Mupaya W, Matthews L, Mbuyisa A, McAdoo S, Weir McCall J, McAllister-Williams H, McArdle A, McArdle P, McAulay D, McCormick J, McCormick W, McCourt P, McGarvey L, McGee C, Mcgee K, McGinness J, McGlynn K, McGovern A, McGuinness H, McInnes IB, McIntosh J, McIvor E, McIvor K, McLeavey L, McMahon A, McMahon MJ, McMorrow L, Mcnally T, McNarry M, McNeill J, McQueen A, McShane H, Mears C, Megson C, Megson S, Mehta P, Meiring J, Melling L, Mencias M, Menzies D, Merida Morillas M, Michael A, Milligan L, Miller C, Mills C, Mills NL, Milner L, Misra S, Mitchell J, Mohamed A, Mohamed N, Mohammed S, Molyneaux PL, Monteiro W, Moriera S, Morley A, Morrison L, Morriss R, Morrow A, Moss AJ, Moss P, Motohashi K, Msimanga N, Mukaetova-Ladinska E, Munawar U, Murira J, Nanda U, Nassa H, Nasseri M, Neal A, Needham R, Neill P, Newell H, Newman T, Newton-Cox A, Nicholson T, Nicoll D, Nolan CM, Noonan MJ, Norman C, Novotny P, Nunag J, Nwafor L, Nwanguma U, Nyaboko J, O'Donnell K, O'Brien C, O'Brien L, O'Regan D, Odell N, Ogg G, Olaosebikan O, Oliver C, Omar Z, Orriss-Dib L, Osborne L, Osbourne R, Ostermann M, Overton C, Owen J, Oxton J, Pack J, Pacpaco E, Paddick S, Painter S, Pakzad A, Palmer S, Papineni P, Paques K, Paradowski K, Pareek M, Parfrey H, Pariante C, Parker S, Parkes M, Parmar J, Patale S, Patel B, Patel M, Patel S, Pattenadk D, Pavlides M, Payne S, Pearce L, Pearl JE, Peckham D, Pendlebury J, Peng Y, Pennington C, Peralta I, Perkins E, Peterkin Z, Peto T, Petousi N, Petrie J, Phipps J, Pimm J, Piper Hanley K, Pius R, Plant H, Plein S, Plekhanova T, Plowright M, Polgar O, Poll L, Porter J, Portukhay S, Powell N, Prabhu A, Pratt J, Price A, Price C, Price C, Price D, Price L, Price L, Prickett A, Propescu J, Pugmire S, Quaid S, Quigley J, 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 K, Smith A, Smith D, Smith S, Smith J, Smith L, Soares M, Solano TS, Solly R, Solstice AR, Soulsby T, Southern D, Sowter D, Spears M, Spencer LG, Speranza F, Stadon L, Stanel S, Steele N, Steiner M, Stensel D, Stephens G, Stephenson L, Stern M, Stewart I, Stimpson R, Stockdale S, Stockley J, Stoker W, Stone R, Storrar W, Storrie A, Storton K, Stringer E, Strong-Sheldrake S, Stroud N, Subbe C, Sudlow CL, Suleiman Z, Summers C, Summersgill C, Sutherland D, Sykes DL, Sykes R, Talbot N, Tan AL, Tarusan L, Tavoukjian V, Taylor A, Taylor C, Taylor J, Te A, Tedd H, Tee CJ, Teixeira J, Tench H, Terry S, Thackray-Nocera S, Thaivalappil F, Thamu B, Thickett D, Thomas C, Thomas S, Thomas AK, Thomas-Woods T, Thompson T, Thompson AAR, Thornton T, Tilley J, Tinker N, Tiongson GF, Tobin M, Tomlinson J, Tong C, Touyz R, Tripp KA, Tunnicliffe E, Turnbull A, Turner E, Turner S, Turner V, Turner K, Turney S, Turtle L, Turton H, Ugoji J, Ugwuoke R, Upthegrove R, Valabhji J, Ventura M, Vere J, Vickers C, 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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Parker E, Mendhe B, Ruan L, Marshall B, Zhi W, Liu Y, Fulzele S, Tang Y, McGee-Lawrence M, Lee TJ, Sharma A, Johnson M, Chen J, Hamrick M. MicroRNA cargo of extracellular vesicles from skeletal muscle fibro-adipogenic progenitor cells is altered with disuse atrophy and IL-1β deficiency. Physiol Genomics 2022; 54:296-304. [PMID: 35759450 PMCID: PMC9342138 DOI: 10.1152/physiolgenomics.00177.2021] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Fibro-adipogenic progenitor cells (FAPs) are a population of stem cells in skeletal muscle that play multiple roles in muscle repair and regeneration through their complex secretome; however, it is not well understood how the FAP secretome is altered with muscle disuse atrophy. Previous work suggests that the inflammatory cytokine IL-1β is increased in FAPs with disuse and denervation. Inflammasome activation and IL-1β secretion are also known to stimulate the release of extracellular vesicles (EVs). Here we examined the microRNA (miRNA) cargo of FAP-derived, PDGFRα+ EVs from hindlimb muscles of wild-type and IL-1β KO mice after 14 days of single-hindlimb immobilization. Hindlimb muscles were isolated from mice following the immobilization period and PDGFRα+ extracellular vesicles isolated using size-exclusion chromatography and immunoprecipitation. Microarrays were performed to detect changes in miRNAs with unloading and IL-1β deficiency. Results indicate that the PDGFRα+, FAP-derived EVs show a significant increase in miRNAs such as miR-let-7c, -let-7b, miR-181a, and -124. These miRNAs have previously been demonstrated to play important roles in cellular senescence and muscle atrophy. Furthermore, expression of these same miRNAs was not significantly altered in FAP-derived EVs isolated from the immobilized IL-1β KO. These data suggest that disuse-related activation of IL-1β can mediate the miRNA cargo of FAP-derived EVs, contributing directly to the release of senescence- and atrophy-related miRNAs. Therapies targeting FAPs in settings associated with muscle disuse atrophy may therefore have potential to preserve muscle function and enhance muscle recovery.
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Affiliation(s)
- Emily Parker
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, United States
| | - Bharati Mendhe
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, United States
| | - Ling Ruan
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, United States
| | - Brendan Marshall
- EM/Histology Core Laboratory, Augusta University, Augusta, GA, United States
| | - Wenbo Zhi
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, United States
| | - Yutao Liu
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, United States
| | - Sadanand Fulzele
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, United States
| | - Yaoliang Tang
- Vascular Biology Center, Augusta University, Augusta, GA, United States
| | - Meghan McGee-Lawrence
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, United States
| | - Tae Jin Lee
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, United States
| | - Ashok Sharma
- Center for Biotechnology and Genomic Medicine, Augusta University, Augusta, GA, United States
| | - Maribeth Johnson
- Vascular Biology Center, Augusta University, Augusta, GA, United States
| | - Jie Chen
- Vascular Biology Center, Augusta University, Augusta, GA, United States
| | - Mark Hamrick
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, United States
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Lee BR, Lee TJ, Oh S, Li C, Song JHA, Marshall B, Zhi W, Kwon SH. Ascorbate peroxidase-mediated in situ labelling of proteins in secreted exosomes. J Extracell Vesicles 2022; 11:e12239. [PMID: 35716063 PMCID: PMC9206227 DOI: 10.1002/jev2.12239] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 04/27/2022] [Accepted: 06/07/2022] [Indexed: 11/12/2022] Open
Abstract
The extracellular vesicle exosome mediates intercellular communication by transporting macromolecules such as proteins and ribonucleic acids (RNAs). Determining cargo contents with high accuracy will help decipher the biological processes that exosomes mediate in various contexts. Existing methods for probing exosome cargo molecules rely on a prior exosome isolation procedure. Here we report an in situ labelling approach for exosome cargo identification, which bypasses the exosome isolation steps. In this methodology, a variant of the engineered ascorbate peroxidase APEX, fused to an exosome cargo protein such as CD63, is expressed specifically in exosome‐generating vesicles in live cells or in secreted exosomes in the conditioned medium, to induce biotinylation of the proteins in the vicinity of the APEX variant for a short period of time. Mass spectrometry analysis of the proteins biotinylated by this approach in exosomes secreted by kidney proximal tubule‐derived cells reveals that oxidative stress can cause ribosomal proteins to accumulate in an exosome subpopulation that contains the CD63‐fused APEX variant.
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Affiliation(s)
- Byung Rho Lee
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Tae Jin Lee
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Sekyung Oh
- Department of Medical Science, Catholic Kwandong University College of Medicine, Incheon, South Korea
| | - Chenglong Li
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Jin-Hyuk A Song
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Wenbo Zhi
- Center for Biotechnology and Genomic Medicine, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
| | - Sang-Ho Kwon
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, USA
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McLarnon SR, Wilson K, Patel B, Sun J, Sartain CL, Mejias CD, Musall JB, Sullivan JC, Wei Q, Chen JK, Hyndman KA, Marshall B, Yang H, Fogo AB, O’Connor PM. Lipopolysaccharide Pretreatment Prevents Medullary Vascular Congestion following Renal Ischemia by Limiting Early Reperfusion of the Medullary Circulation. J Am Soc Nephrol 2022; 33:769-785. [PMID: 35115326 PMCID: PMC8970460 DOI: 10.1681/asn.2021081089] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 01/16/2022] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Vascular congestion of the renal medulla-trapped red blood cells in the medullary microvasculature-is a hallmark finding at autopsy in patients with ischemic acute tubular necrosis. Despite this, the pathogenesis of vascular congestion is not well defined. METHODS In this study, to investigate the pathogenesis of vascular congestion and its role in promoting renal injury, we assessed renal vascular congestion and tubular injury after ischemia reperfusion in rats pretreated with low-dose LPS or saline (control). We used laser Doppler flowmetry to determine whether pretreatment with low-dose LPS prevented vascular congestion by altering renal hemodynamics during reperfusion. RESULTS We found that vascular congestion originated during the ischemic period in the renal venous circulation. In control animals, the return of blood flow was followed by the development of congestion in the capillary plexus of the outer medulla and severe tubular injury early in reperfusion. Laser Doppler flowmetry indicated that blood flow returned rapidly to the medulla, several minutes before recovery of full cortical perfusion. In contrast, LPS pretreatment prevented both the formation of medullary congestion and its associated tubular injury. Laser Doppler flowmetry in LPS-pretreated rats suggested that limiting early reperfusion of the medulla facilitated this protective effect, because it allowed cortical perfusion to recover and clear congestion from the large cortical veins, which also drain the medulla. CONCLUSIONS Blockage of the renal venous vessels and a mismatch in the timing of cortical and medullary reperfusion results in congestion of the outer medulla's capillary plexus and promotes early tubular injury after renal ischemia. These findings indicate that hemodynamics during reperfusion contribute to the renal medulla's susceptibility to ischemic injury.
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Affiliation(s)
- Sarah R. McLarnon
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Katie Wilson
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Bansari Patel
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Jingping Sun
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Christina L. Sartain
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Christopher D. Mejias
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Jacqueline B. Musall
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Jennifer C. Sullivan
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Qingqing Wei
- Department of Cell Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Jian-Kang Chen
- Department of Cell Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Kelly A. Hyndman
- Cardio-Renal Physiology and Medicine, Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Brendan Marshall
- Department of Cell Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, Georgia
| | - Haichun Yang
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Agnes B. Fogo
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Paul M. O’Connor
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
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Xu J, Liu X, Zhang X, Marshall B, Dong Z, Smith SB, Espinosa-Heidmann DG, Zhang M. Retinal and Choroidal Pathologies in Aged BALB/c Mice Following Systemic Neonatal Murine Cytomegalovirus Infection. Am J Pathol 2021; 191:1787-1804. [PMID: 34197777 PMCID: PMC8485058 DOI: 10.1016/j.ajpath.2021.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 06/04/2021] [Accepted: 06/14/2021] [Indexed: 11/30/2022]
Abstract
Although pathologies associated with acute virus infections have been extensively studied, the effects of long-term latent virus infections are less well understood. Human cytomegalovirus, which infects 50% to 80% of humans, is usually acquired during early life and persists in a latent state for the lifetime. The purpose of this study was to determine whether systemic murine cytomegalovirus (MCMV) infection acquired early in life disseminates to and becomes latent in the eye and if ocular MCMV can trigger in situ inflammation and occurrence of ocular pathology. This study found that neonatal infection of BALB/c mice with MCMV resulted in dissemination of virus to the eye, where it localized principally to choroidal endothelia and pericytes and less frequently to the retinal pigment epithelium (RPE) cells. MCMV underwent ocular latency, which was associated with expression of multiple virus genes and from which MCMV could be reactivated by immunosuppression. Latent ocular infection was associated with significant up-regulation of several inflammatory/angiogenic factors. Retinal and choroidal pathologies developed in a progressive manner, with deposits appearing at both basal and apical aspects of the RPE, RPE/choroidal atrophy, photoreceptor degeneration, and neovascularization. The pathologies induced by long-term ocular MCMV latency share features of previously described human ocular diseases, such as age-related macular degeneration.
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Affiliation(s)
- Jinxian Xu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia; James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Xinglou Liu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia; James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Xinyan Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia; James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Zheng Dong
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia; Charlie Norwood Veterans Affairs Medical Center, Augusta, Georgia
| | - Sylvia B Smith
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia; James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia; Department of Ophthamology, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Diego G Espinosa-Heidmann
- James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia; Department of Ophthamology, Medical College of Georgia, Augusta University, Augusta, Georgia
| | - Ming Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia; James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia.
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15
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Cho D, Jacka B, Marshall B, Beaudoin F. 239 Evaluating the Role of Recovery Capital on Willingness to Enter Treatment for Emergency Department Patients With Opioid Use Disorders. Ann Emerg Med 2021. [DOI: 10.1016/j.annemergmed.2021.09.251] [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: 11/28/2022]
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16
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Barwick SR, Siddiq MS, Wang J, Xiao H, Marshall B, Perry E, Smith SB. Sigma 1 Receptor Co-Localizes with NRF2 in Retinal Photoreceptor Cells. Antioxidants (Basel) 2021; 10:antiox10060981. [PMID: 34205384 PMCID: PMC8234060 DOI: 10.3390/antiox10060981] [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] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 06/10/2021] [Accepted: 06/18/2021] [Indexed: 12/25/2022] Open
Abstract
Sigma 1 receptor (Sig1R), a modulator of cell survival, has emerged as a novel target for retinal degenerative disease. Studies have shown that activation of Sig1R, using the high affinity ligand (+)-pentazocine ((+)-PTZ), improves cone function in a severe retinopathy model. The rescue is accompanied by normalization of levels of NRF2, a key transcription factor that regulates the antioxidant response. The interaction of Sig1R with a number of proteins has been investigated; whether it interacts with NRF2, however, is not known. We used co-immunoprecipitation (co-IP), proximity ligation assay (PLA), and electron microscopy (EM) immunodetection methods to investigate this question in the 661W cone photoreceptor cell line. For co-IP experiments, immune complexes were precipitated by protein A/G agarose beads and immunodetected using anti-NRF2 antibody. For PLA, cells were incubated with anti-Sig1R polyclonal and anti-NRF2 monoclonal antibodies, then subsequently with (−)-mouse and (+)-rabbit PLA probes. For EM analysis, immuno-EM gold labeling was performed using nanogold-enhanced labeling with anti-NRF2 and anti-Sig1R antibodies, and data were confirmed using colloidal gold labeling. The co-IP experiment suggested that NRF2 was bound in a complex with Sig1R. The PLA assays detected abundant orange fluorescence in cones, indicating that Sig1R and NRF2 were within 40 nm of each other. EM immunodetection confirmed co-localization of Sig1R with NRF2 in cells and in mouse retinal tissue. This study is the first to report co-localization of Sig1R-NRF2 and supports earlier studies implicating modulation of NRF2 as a mechanism by which Sig1R mediates retinal neuroprotection.
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Affiliation(s)
- Shannon R. Barwick
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (S.R.B.); (M.S.S.); (J.W.); (H.X.); (B.M.); (E.P.)
- James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA 30912, USA
| | - Mevish S. Siddiq
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (S.R.B.); (M.S.S.); (J.W.); (H.X.); (B.M.); (E.P.)
| | - Jing Wang
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (S.R.B.); (M.S.S.); (J.W.); (H.X.); (B.M.); (E.P.)
- James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA 30912, USA
| | - Haiyan Xiao
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (S.R.B.); (M.S.S.); (J.W.); (H.X.); (B.M.); (E.P.)
- James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA 30912, USA
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (S.R.B.); (M.S.S.); (J.W.); (H.X.); (B.M.); (E.P.)
| | - Elizabeth Perry
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (S.R.B.); (M.S.S.); (J.W.); (H.X.); (B.M.); (E.P.)
| | - Sylvia B. Smith
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA; (S.R.B.); (M.S.S.); (J.W.); (H.X.); (B.M.); (E.P.)
- James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA 30912, USA
- Department of Ophthalmology, Medical College of Georgia at Augusta University, Augusta, GA 30912, USA
- Correspondence: ; Tel.: +1-706-721-7392; Fax: +1-706-721-6120
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Ahn W, Singla B, Marshall B, Csányi G. Visualizing Membrane Ruffle Formation using Scanning Electron Microscopy. J Vis Exp 2021. [PMID: 34125102 DOI: 10.3791/62658] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Membrane ruffling is the formation of motile plasma membrane protrusions containing a meshwork of newly polymerized actin filaments. Membrane ruffles may form spontaneously or in response to growth factors, inflammatory cytokines, and phorbol esters. Some of the membrane protrusions may reorganize into circular membrane ruffles that fuse at their distal margins and form cups that close and separate into the cytoplasm as large, heterogeneous vacuoles called macropinosomes. During the process, ruffles trap extracellular fluid and solutes that internalize within macropinosomes. High-resolution scanning electron microscopy (SEM) is a commonly used imaging technique to visualize and quantify membrane ruffle formation, circular protrusions, and closed macropinocytic cups on the cell surface. The following protocol describes the cell culture conditions, stimulation of the membrane ruffle formation in vitro, and how to fix, dehydrate, and prepare cells for imaging using SEM. Quantification of membrane ruffling, data normalization, and stimulators and inhibitors of membrane ruffle formation are also described. This method can help answer key questions about the role of macropinocytosis in physiological and pathological processes, investigate new targets that regulate membrane ruffle formation, and identify yet uncharacterized physiological stimulators as well as novel pharmacological inhibitors of macropinocytosis.
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Affiliation(s)
- WonMo Ahn
- Vascular Biology Center, Medical College of Georgia at Augusta University
| | - Bhupesh Singla
- Vascular Biology Center, Medical College of Georgia at Augusta University
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia at Augusta University
| | - Gábor Csányi
- Vascular Biology Center, Medical College of Georgia at Augusta University; Department of Pharmacology and Toxicology, Medical College of Georgia at Augusta University;
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Bose HS, Whittal RM, Marshall B, Rajapaksha M, Wang NP, Bose M, Perry EW, Zhao ZQ, Miller WL. A Novel Mitochondrial Complex of Aldosterone Synthase, Steroidogenic Acute Regulatory Protein, and Tom22 Synthesizes Aldosterone in the Rat Heart. J Pharmacol Exp Ther 2021; 377:108-120. [PMID: 33526603 DOI: 10.1124/jpet.120.000365] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 01/25/2021] [Indexed: 12/14/2022] Open
Abstract
Aldosterone, which regulates renal salt retention, is synthesized in adrenocortical mitochondria in response to angiotensin II. Excess aldosterone causes myocardial injury and heart failure, but potential intracardiac aldosterone synthesis has been controversial. We hypothesized that the stressed heart might produce aldosterone. We used blue native gel electrophoresis, immunoblotting, protein crosslinking, coimmunoprecipitations, and mass spectrometry to assess rat cardiac aldosterone synthesis. Chronic infusion of angiotensin II increased circulating corticosterone levels 350-fold and induced cardiac fibrosis. Angiotensin II doubled and telmisartan inhibited aldosterone synthesis by heart mitochondria and cardiac production of aldosterone synthase (P450c11AS). Heart aldosterone synthesis required P450c11AS, Tom22 (a mitochondrial translocase receptor), and the intramitochondrial form of the steroidogenic acute regulatory protein (StAR); protein crosslinking and coimmunoprecipitation studies showed that these three proteins form a 110-kDa complex. In steroidogenic cells, extramitochondrial (37-kDa) StAR promotes cholesterol movement from the outer to inner mitochondrial membrane where cholesterol side-chain cleavage enzyme (P450scc) converts cholesterol to pregnenolone, thus initiating steroidogenesis, but no function has previously been ascribed to intramitochondrial (30-kDa) StAR; our data indicate that intramitochondrial 30-kDa StAR is required for aldosterone synthesis in the heart, forming a trimolecular complex with Tom22 and P450c11AS. This is the first activity ascribed to intramitochondrial StAR, but how this promotes P450c11AS activity is unclear. The stressed heart did not express P450scc, suggesting that circulating corticosterone (rather than intracellular cholesterol) is the substrate for cardiac aldosterone synthesis. Thus, the stressed heart produced aldosterone using a previously undescribed intramitochondrial mechanism that involves P450c11AS, Tom22, and 30-kDa StAR. SIGNIFICANCE STATEMENT: Prior studies of potential cardiac aldosterone synthesis have been inconsistent. This study shows that the stressed rat heart produces aldosterone by a novel mechanism involving aldosterone synthase, Tom22, and intramitochondrial steroidogenic acute regulatory protein (StAR) apparently using circulating corticosterone as substrate. This study establishes that the stressed rat heart produces aldosterone and for the first time identifies a biological role for intramitochondrial 30-kDa StAR.
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Affiliation(s)
- Himangshu S Bose
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Randy M Whittal
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Brendan Marshall
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Maheshinie Rajapaksha
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Ning Ping Wang
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Madhuchanda Bose
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Elizabeth W Perry
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Zhi-Qing Zhao
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
| | - Walter L Miller
- Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia (H.S.B., M.R., N.P.W., Z.-Q.Z.); Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada (R.M.W.); Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Georgia (B.M., E.W.P.); Curtiss Healthcare, University of Florida Innovate Sid Martin Biotechbology Incubator, Gainesville, Florida (M.B.); Anderson Cancer Institute, Savannah, Georgia (H.S.B.); and Department of Pediatrics and Center for Reproductive Sciences, University of California San Francisco, San Francisco, California (W.L.M.)
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19
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Gunn H, Stevens KN, Creanor S, Andrade J, Paul L, Miller L, Green C, Ewings P, Barton A, Berrow M, Vickery J, Marshall B, Zajicek J, Freeman JA. Balance Right in Multiple Sclerosis (BRiMS): a feasibility randomised controlled trial of a falls prevention programme. Pilot Feasibility Stud 2021; 7:2. [PMID: 33390184 PMCID: PMC7780657 DOI: 10.1186/s40814-020-00732-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 11/23/2020] [Indexed: 11/24/2022] Open
Abstract
Background Balance, mobility impairments and falls are problematic for people with multiple sclerosis (MS). The “Balance Right in MS (BRiMS)” intervention, a 13-week home and group-based exercise and education programme, aims to improve balance and minimise falls. This study aimed to evaluate the feasibility of undertaking a multi-centre randomised controlled trial and to collect the necessary data to design a definitive trial. Methods This randomised controlled feasibility study recruited from four United Kingdom NHS clinical neurology services. Patients ≥ 18 years with secondary progressive MS (Expanded Disability Status Scale 4 to 7) reporting more than two falls in the preceding 6 months were recruited. Participants were block-randomised to either a manualised 13-week education and exercise programme (BRiMS) plus usual care, or usual care alone. Feasibility assessment evaluated recruitment and retention rates, adherence to group assignment and data completeness. Proposed outcomes for the definitive trial (including impact of MS, mobility, quality of life and falls) and economic data were collected at baseline, 13 and 27 weeks, and participants completed daily paper falls diaries. Results Fifty-six participants (mean age 59.7 years, 66% female, median EDSS 6.0) were recruited in 5 months; 30 randomised to the intervention group. Ten (18%) participants withdrew, 7 from the intervention group. Two additional participants were lost to follow up at the final assessment point. Completion rates were > 98% for all outcomes apart from the falls diary (return rate 62%). After adjusting for baseline score, mean intervention—usual care between-group differences for the potential primary outcomes at week 27 were MS Walking Scale-12v2: − 7.7 (95% confidence interval [CI] − 17.2 to 1.8) and MS Impact Scale-29v2: physical 0.6 (CI − 7.8 to 9), psychological − 0.4 (CI − 9.9 to 9). In total, 715 falls were reported, rate ratio (intervention:usual care) for falls 0.81 (0.41 to 2.26) and injurious falls 0.44 (0.41 to 2.23). Conclusions Procedures were practical, and retention, programme engagement and outcome completion rates satisfied a priori progression criteria. Challenges were experienced in completion and return of daily falls diaries. Refinement of methods for reporting falls is therefore required, but we consider a full trial to be feasible. Trial registration ISRCTN13587999 Date of registration: 29 September 2016
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Affiliation(s)
- H Gunn
- Faculty of Health, School of Health Professions, Peninsula Allied Health Centre, University of Plymouth, Derriford Road, Plymouth, PL6 8BH, England.
| | - K N Stevens
- Faculty of Health, Medical Statistics Group, Room N15, Plymouth Science Park, Plymouth, PL6 8BX, England.,Peninsula Clinical Trials Unit, University of Plymouth, Room N16, Plymouth Science Park, Plymouth, PL6 8BX, England
| | - S Creanor
- Faculty of Health, Medical Statistics Group, Room N15, Plymouth Science Park, Plymouth, PL6 8BX, England.,University of Exeter Medical School, College of Medicine & Health, University of Exeter, Exeter, England
| | - J Andrade
- Faculty of Health, School of Psychology, University of Plymouth, Portland Square Building, Drake Circus Campus, Plymouth, PL4 8AA, England
| | - L Paul
- School of Health & Life Sciences, Glasgow Caledonian University, Cowcaddens Road, Glasgow, G4 0BA, Scotland
| | - L Miller
- Douglas Grant Rehabilitation Unit, Ayrshire Central Hospital, Kilwinning Road, Irvine, KA12 8SS, Scotland
| | - C Green
- University of Exeter Medical School, Health Economics Group, University of Exeter, St. Luke's Campus, Exeter, EX1 2LU, England
| | - P Ewings
- NIHR Research Design Service (South West), Musgrove Park Hospital, Taunton, TA1 5DA, England
| | - A Barton
- Faculty of Medicine and Dentistry, NIHR Research Design Service South West, ITTC Building, Plymouth Science Park, Plymouth, PL6 8BX, England
| | - M Berrow
- Faculty of Health, Medical Statistics Group, Room N15, Plymouth Science Park, Plymouth, PL6 8BX, England
| | - J Vickery
- Faculty of Health, Medical Statistics Group, Room N15, Plymouth Science Park, Plymouth, PL6 8BX, England
| | - B Marshall
- Faculty of Health, School of Health Professions, Peninsula Allied Health Centre, University of Plymouth, Derriford Road, Plymouth, PL6 8BH, England
| | - J Zajicek
- School of Medicine, Medical and Biological Sciences, University of St. Andrews, North Haugh, St. Andrews, KY16 9TF, Scotland
| | - J A Freeman
- Faculty of Health, School of Health Professions, Peninsula Allied Health Centre, University of Plymouth, Derriford Road, Plymouth, PL6 8BH, England
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20
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West N, Goss C, Heltshe S, Skalland M, Sanders D, Jain R, Barto T, Fogarty B, Marshall B, VanDevanter D, Flume. P. WS09.6 A randomised clinical trial of antimicrobial duration for treatment of cystic fibrosis pulmonary exacerbations (STOP2). J Cyst Fibros 2021. [DOI: 10.1016/s1569-1993(21)00968-1] [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: 12/01/2022]
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21
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Bose HS, Marshall B, Debnath DK, Perry EW, Whittal RM. Electron Transport Chain Complex II Regulates Steroid Metabolism. iScience 2020; 23:101295. [PMID: 32623340 PMCID: PMC7334606 DOI: 10.1016/j.isci.2020.101295] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 04/23/2020] [Accepted: 06/15/2020] [Indexed: 11/15/2022] Open
Abstract
The first steroidogenic enzyme, cytochrome P450-side-chain-cleavage (SCC), requires electron transport chain (ETC) complexes III and IV to initiate steroid metabolic processes for mammalian survival. ETC complex II, containing succinate dehydrogenase (quinone), acts with the TCA cycle and has no proton pumping capacity. We show that complex II is required for SCC activation through the proton pump, generating an intermediate state for addition of phosphate by succinate. Phosphate anions in the presence of succinate form a stable mitochondrial complex with higher enthalpy (-ΔH) and enhanced activity. Inhibition of succinate action prevents SCC processing at the intermediate state and ablates activity and mitochondrial protein network. This is the first report directly showing that a protein intermediate state is activated by succinate, facilitating the ETC complex II to interact with complexes III and IV for continued mitochondrial metabolic process, suggesting complex II is essential for steroid metabolism regulation. P450 SCC synthesizes first steroid with the electrons from ETC complex III to IV Succinate from complex II activates complex III for the metabolic activity Absence of succinate ablates mitochondrial processing of SCC and metabolic activity Succinate anion stabilizes ETC complex II for the activation of steroid metabolism
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Affiliation(s)
- Himangshu S Bose
- Biomedical Sciences, Mercer U School of Medicine, Memorial University Medical Center, 1250 East 66th Street, Savannah, GA 31404, USA; Anderson Cancer Institute, Savannah, GA, USA.
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - Dilip K Debnath
- Biomedical Sciences, Mercer U School of Medicine, Memorial University Medical Center, 1250 East 66th Street, Savannah, GA 31404, USA
| | - Elizabeth W Perry
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA, USA
| | - Randy M Whittal
- Department of Chemistry, University of Alberta, Edmonton, Canada
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22
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Miller R, Ward C, Marshall B, Cross P, Davey E, Mitchell W, Chan R, Fielding M, Gordon S, Atmore C, Blattner K. Postcards from the edge. J Prim Health Care 2020; 12:107-112. [PMID: 32594975 DOI: 10.1071/hc15953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Rory Miller
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand; and Corresponding author.
| | - Clare Ward
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | - Brendan Marshall
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | - Philippa Cross
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | - Emma Davey
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | | | - Robin Chan
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | - Margaret Fielding
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | - Sara Gordon
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | - Carol Atmore
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
| | - Katharina Blattner
- Leaning on Fenceposts: Rural Health News and Research from the Rural Section, Department of General Practice and Rural Health, New Zealand
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23
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Hong G, Moss R, Marshall B, Quon B, Eschenhagen P, Schwarz C. P107 ECFS/CFF global survey on diagnosis and treatment of Aspergillus fumigatus-related conditions. J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30442-2] [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: 11/25/2022]
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24
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Xu J, Liu X, Zhang X, Marshall B, Dong Z, Liu Y, Espinosa-Heidmann DG, Zhang M. Ocular cytomegalovirus latency exacerbates the development of choroidal neovascularization. J Pathol 2020; 251:200-212. [PMID: 32243583 DOI: 10.1002/path.5447] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 02/28/2020] [Accepted: 03/27/2020] [Indexed: 12/12/2022]
Abstract
Age-related macular degeneration (AMD) is a complex, multifactorial, progressive disease which represents a leading cause of irreversible visual impairment and blindness in older individuals. Human cytomegalovirus (HCMV), which infects 50-80% of humans, is usually acquired during early life and persists in a latent state for the life of the individual. In view of its previously described pro-angiogenic properties, we hypothesized that cytomegalovirus might be a novel risk factor for progression to an advanced form, neovascular AMD, which is characterized by choroidal neovascularization (CNV). The purpose of this study was to investigate if latent ocular murine cytomegalovirus (MCMV) infection exacerbated the development of CNV in vascular endothelial growth factor (VEGF)-overexpressing VEGF-Ahyper mice. Here we show that neonatal infection with MCMV resulted in dissemination of virus to various organs throughout the body including the eye, where it localized principally to the choroid in both VEGF-overexpressingVEGF-Ahyper and wild-type(WT) 129 mice. By 6 months post-infection, no replicating virus was detected in eyes and extraocular tissues, although virus DNA was still present in all eyes and extraocular tissues of both VEGF-Ahyper and WT mice. Expression of MCMV immediate early (IE) 1 mRNA was detected only in latently infected eyes of VEGF-Ahyper mice, but not in eyes of WT mice. Significantly increased CNV was observed in eyes of MCMV-infected VEGF-Ahyper mice compared to eyes of uninfected VEGF-Ahyper mice, while no CNV lesions were observed in eyes of either infected or uninfected WT mice. Protein levels of several inflammatory/angiogenic factors, particularly VEGF and IL-6, were significantly higher in eyes of MCMV-infected VEGF-Ahyper mice, compared to uninfected controls. Initial studies of ocular tissue from human cadavers revealed that HCMV DNA was present in four choroid/retinal pigment epithelium samples from 24 cadavers. Taken together, our data suggest that ocular HCMV latency could be a significant risk factor for the development of AMD. © 2020 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Jinxian Xu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,The James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA
| | - Xinglou Liu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,The James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA.,Department of Pediatrics, Tongji Hospital, Huazhong University of Science and Technology, Wuhan, PR China
| | - Xinyan Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,The James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Zheng Dong
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,Charlie Norwood VA Medical Center, Augusta, GA, USA
| | - Yutao Liu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,The James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA.,Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Diego G Espinosa-Heidmann
- The James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA.,Department of Ophthalmology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Ming Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA, USA.,The James and Jean Culver Vision Discovery Institute, Augusta University, Augusta, GA, USA
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25
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Bose HS, Marshall B, Debnath D, Perry EW, Whittal RM. SUN-219 Electron Transport Chain Complex 2 in Mitochondrial Pregnenolone Synthesis. J Endocr Soc 2020. [PMCID: PMC7208151 DOI: 10.1210/jendso/bvaa046.602] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The mitochondrial P450 family of enzymes (SCC), which require the electron transport chain (ETC) complexes III, IV and V, initiate steroidogenesis by cleaving the sidechain of cholesterol to synthesize steroid hormones, an essential component for mammalian survival. SCC is required for full-term gestation, and aberrant expression may cause pseudohermaphroditism, breast cancer or polycystic ovary syndrome. Complex II or succinate dehydrogenase (quinone) is shared with the TCA cycle and has no proton pumping capacity and no known role in steroid synthesis. We now show that succinate is an intermediate metabolite in the TCA cycle and plays a central role physiologically. Specifically, complex II is required for SCC activation, where the proton pump facilitates an active intermediate state conformation at the matrix, so that in the presence of succinate, ATP can add phosphate. A longer intermediate equilibrium state generates a transient stabilization to enhance the binding of phosphate anions in the presence of succinate anions, resulting in higher enthalpy and activity. An inhibition of the processing at the intermediate state stops phosphate addition and activity. We further describe that phosphate circulation brings the molten globule, an intermediate, to an active folded state. This is the first report showing that an intermediate state activated by succinate facilitates ETC complex II interaction with complexes III and IV for metabolism.
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Affiliation(s)
| | | | - Dilip Debnath
- Mercer University School of Medicine, Savannah, GA, USA
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26
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Bose HS, Whittal RM, Rajapaksha M, Marshall B, Wang NP, Perry EW, Zhao ZQ, Miller WL. SAT-562 Angiotensin II Induces Aldosterone Synthesis in the Rat Heart Stressed by Angiotensin II. J Endocr Soc 2020. [PMCID: PMC7209277 DOI: 10.1210/jendso/bvaa046.595] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Aldosterone (Aldo) causes myocardial injury and fibrosis. While most Aldo is made by the adrenal zona glomerulosa; there have been controversial reports that Aldo is also synthesized in the heart; such myocardial synthesis of Aldo might contribute to myocardial injury. We induced cardiac fibrosis in rats by infusing angiotensin II (AngII) @ 500 ng/kg/min via subcutaneous pumps. After 4 weeks, circulating corticosterone increased about 400-fold from ~29 nM to ~11 μM. Aldo synthesis in isolated mitochondria (mito) was assessed by conversion of tritiated deoxycorticosterone to Aldo; AngII infusion doubled Aldo synthesis, and this augmented synthesis was inhibited in mito from rats receiving AngII + telmisartan, which inhibits the binding of AngII to the AT1 receptor. Western blotting showed P450c11AS (Aldo synthase) was also stimulated by AngII and inhibited by telmisartan in both rat heart and H9c2 myocardial cells. 2-dimentional native PAGE and mass spectrometry showed that a 290-kDa complex on the inner mitochondrial membrane (IMM) contained P450c11AS, Tom22 (a translocase associated with the outer mitochondrial membrane, OMM), and StAR (the steroidogenic acute regulatory protein). Immunocytochemistry and transmission electron microscopy monitoring of immune-gold particles confirmed that P450c11AS, Tom22, and StAR were associated with the mito, that P450c11AS and StAR were associated with the IMM and that P450c11AS and StAR, but not Tom22, were increased by AngII. Cardiac Aldo synthesis required myocardial expression of P450c11AS, but expression of P450scc, the initial steroidogenic enzyme that converts cholesterol to pregnenolone, was undetectable, indicating the heart cannot make Aldo de novo from cholesterol. The only known action of StAR is to promote the movement of cholesterol from the OMM to IMM; nevertheless, we found that intramitochondrial StAR is required for Aldo synthesis; protein crosslinking with BS3 showed that Tom22 forms a bridge between StAR and P450c11AS. This is the first activity ascribed to intramitochondrial StAR, but the manner by which StAR promotes P450c11AS activity is unclear. As P450scc was undetectable, and circulating concentrations of corticosterone approached the Km (~28 μM) for the use of corticosterone as a substrate for P450c11AS, we suggest that cardiac P450c11AS uses circulating steroids for substrate. Thus the stressed heart produces aldosterone using a previously undescribed intramitochondrial mechanism that involves P450c11AS, Tom22 and StAR
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Affiliation(s)
| | | | | | | | | | | | - Zhi-qing Zhao
- Mercer University School of Medicine, Savannah, GA, USA
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27
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Marshall B, Aileone L. COVID-19 pandemic and rural generalism: the West Coast's rural workforce solution. N Z Med J 2020; 133:90-92. [PMID: 32379747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
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28
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Marshall B, Wright DJ, Holmes PS, Williams J, Wood G. Combined action observation and motor imagery facilitates visuomotor adaptation in children with developmental coordination disorder. Res Dev Disabil 2020; 98:103570. [PMID: 31918039 DOI: 10.1016/j.ridd.2019.103570] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 11/28/2019] [Accepted: 12/30/2019] [Indexed: 06/10/2023]
Abstract
The internal modelling deficit (IMD) hypothesis suggests that motor control issues associated with Developmental Coordination Disorder (DCD) are the result of impaired predictive motor control. In this study, we examined the benefits of a combined action observation and motor imagery (AO + MI) intervention designed to alleviate deficits in internal modelling and improve eye-hand coordination during a visuomotor rotation task. Twenty children with DCD were randomly assigned to either an AO + MI group (who watched a video of a performer completing the task whilst simultaneously imagining the kinaesthetic sensations associated with action execution) or a control group (who watched unrelated videos involving no motor content). Each group then attempted to learn a 90° visuomotor rotation while measurements of completion time, eye-movement behaviour and movement kinematics were recorded. As predicted, after training, the AO + MI group exhibited quicker completion times, more target-focused eye-movement behaviour and smoother movement kinematics compared to the control group. No significant after-effects were present. These results offer further support for the IMD hypothesis and suggest that AO + MI interventions may help to alleviate such deficits and improve motor performance in children with DCD.
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Affiliation(s)
- B Marshall
- Research Centre for Musculoskeletal Science and Sports Medicine, Department of Sport and Exercise Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - D J Wright
- Research Centre for Musculoskeletal Science and Sports Medicine, Department of Psychology, Faculty of Health, Psychology and Social Care, Manchester Metropolitan University, Manchester, UK
| | - P S Holmes
- Research Centre for Musculoskeletal Science and Sports Medicine, Department of Psychology, Faculty of Health, Psychology and Social Care, Manchester Metropolitan University, Manchester, UK
| | - J Williams
- Institute for Sport and Health, College of Sport and Exercise Science, Victoria University, Melbourne, Australia
| | - G Wood
- Research Centre for Musculoskeletal Science and Sports Medicine, Department of Sport and Exercise Sciences, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK.
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Abstract
OBJECTIVE This study aimed to compare choroidal thickness between patients with systemic lupus erythematosus (SLE) and lupus nephritis (LN) in complete renal remission to that of patients with SLE without LN. METHODS This was a retrospective case-control study of 23 SLE patients meeting either the American College of Rheumatology or Systemic Lupus International Collaborating Clinics classification criteria and followed at Washington University School of Medicine Rheumatology or Nephrology, and Ophthalmology outpatient clinics. The diagnosis of LN was based on renal pathology, and complete renal remission was defined as proteinuria <500 mg/daily and serum creatinine at baseline. Extra-renal flare status was determined using modified Fortin criteria. Choroidal thickness was measured using spectral-domain optical coherence tomography and read by blinded reviewers. RESULTS In SLE patients without extra-renal flare, choroidal thickness of LN patients was 281 ± 78 µm compared to 288 ± 70 µm in non-LN SLE patients (p = 0.766) at the fovea. CONCLUSION Choroidal thickness was not different in patients with LN in remission compared to non-LN SLE patients in remission. Additional studies are needed to examine choroidal thickness in patients with SLE with active LN.
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Affiliation(s)
- I Lee
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, USA
| | - B Marshall
- Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, USA
| | - P Ranganathan
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, USA
| | - S Eisen
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, USA
| | - R Rajagopal
- Department of Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, USA
| | - A H J Kim
- Division of Rheumatology, Department of Medicine, Washington University School of Medicine, St. Louis, USA
| | - T Li
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, USA
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Bose HS, Rice AM, Marshall B, Gebrail F, Kupshik D, Perry EW. Deficient pregnenolone synthesis associated with congenital adrenal hyperplasia and organelle dysfunction. Endocrinol Diabetes Metab Case Rep 2019; 2019:EDM190009. [PMID: 31051467 PMCID: PMC6499912 DOI: 10.1530/edm-19-0009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 04/11/2019] [Indexed: 12/01/2022] Open
Abstract
Steroid hormones are essential for the survival of all mammals. In adrenal glands and gonads, cytochrome P450 side chain cleavage enzyme (SCC or CYP11A1), catalyzes conversion of cholesterol to pregnenolone. We studied a patient with ambiguous genitalia by the absence of Müllerian ducts and the presence of an incompletely formed vagina, who had extremely high adrenocorticotropic hormone (ACTH) and reduced pregnenolone levels with enlarged adrenal glands. The testes revealed seminiferous tubules, stroma, rete testis with interstitial fibrosis and reduced number of germ cells. Electron microscopy showed that the patient's testicular mitochondrial size was small with little SCC expression within the mitochondria. The mitochondria were not close to the mitochondria-associated ER membrane (MAM), and cells were filled with the microfilaments. Our result revealed that absence of pregnenolone is associated with organelle stress, leading to altered protein organization that likely created steric hindrance in testicular cells. Learning points: Testes revealed seminiferous tubules, stroma, rete testis with interstitial fibrosis and reduced number of germ cells; Testicular mitochondrial size was small with little SCC expression within the mitochondria; Absence of pregnenolone is associated with organelle stress.
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Affiliation(s)
- Himangshu S Bose
- Laboratory of Biochemistry, Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia, USA
- Memorial University Medical Center, Savannah, Georgia, USA
| | - Alan M Rice
- Laboratory of Biochemistry, Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia, USA
- Pediatric Endocrinology and Diabetes Center, Kalispell Regional Medical Center, Kalispell, Montana, USA
| | - Brendan Marshall
- Anatomy and Pathology, Augusta State University, Augusta, Georgia, USA
| | - Fadi Gebrail
- Laboratory of Biochemistry, Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia, USA
- Laboratory of Pathology, Memorial University Medical Center, Savannah, Georgia, USA
| | - David Kupshik
- Laboratory of Biochemistry, Biomedical Sciences, Mercer University School of Medicine, Savannah, Georgia, USA
| | - Elizabeth W Perry
- Anatomy and Pathology, Augusta State University, Augusta, Georgia, USA
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Bose H, Marshall B, Perry E, Whittal R. SUN-191 Stress Opens Tim23 Complex Resulting Faster Steroid Metabolism. J Endocr Soc 2019. [PMCID: PMC6553424 DOI: 10.1210/js.2019-sun-191] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Himangshu Bose
- Mercer University School of Medicine, Savannah, GA, United States
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Bose H, Gebrail F, Marshall B, Perru E, Whittal R. SAT-347 Unfolding Generates an Active CYP11A1 for Mitochondrial Integration and Activity. J Endocr Soc 2019. [PMCID: PMC6551962 DOI: 10.1210/js.2019-sat-347] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Mitochondrial protein import and sorting are mediated by translocases. Precursor proteins with amino-terminal presequences transition from the translocase of the outer membrane (TOM) complex to the translocase of the inner membrane (TIM) complex. In adrenal and gonadal cells, the molecular mechanism of mitochondrial complex formation and electron transport to initiate and maintain steroid metabolic activity has remained unclear. On the mitochondrial surface, Tom22 or Tom20 directs precursor import through the pore-forming subunit, Tom40. After emerging from the Tom40 channel, presequence-containing precursors engage with the presequence translocase of the inner membrane or reach the matrix directly as a permanent resident or are integrated into the membrane. Thus, the activity of the inner membrane translocase is tightly regulated by targeting signals in a yet undefined manner. For the first time, we show that testicular as well as adrenal mitochondrial metabolic activity is dependent on more than one protein, where Tim50 and SCC are equally important, and depends on the specific unfolding conformation necessary for SCC. Following mitochondrial import of SCC, the N-terminus is first cleaved rapidly and then slowly cleaved a second time. The unfolded protein is transported to the IMS, where the C-terminus is inserted into the TIM23 complex, resulting in a significantly unfolded protein to interact and associate with Tim50 for metabolic activity. Therefore, Tim50 is possibly playing a role of a key factor for SCC metabolic activity in addition to the co-factors ferrodoxin and ferrodoxin reductase.
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Affiliation(s)
- Himangshu Bose
- Mercer University School of Medicine, Savannah, GA, United States
| | - Fadi Gebrail
- Memorial University Medical Center, Savannah, GA, United States
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Bose HS, Marshall B, Perry EW, Whittal RM. Inner mitochondrial translocase Tim50 is central in steroid metabolism in steroidogenic tissues. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.660.3] [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: 11/11/2022]
Affiliation(s)
- Himangshu S Bose
- Biomedical SciencesMercer University School of MedicineSavannahGA
| | - Brendan Marshall
- Cell Biology and AnatomyAugusta State UniversityAugustaGA
- Cell Biology and AntomyAugusta State UniversityAugustaGA
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Xu J, Mo J, Liu X, Marshall B, Atherton SS, Dong Z, Smith S, Zhang M. Depletion of the Receptor-Interacting Protein Kinase 3 (RIP3) Decreases Photoreceptor Cell Death During the Early Stages of Ocular Murine Cytomegalovirus Infection. Invest Ophthalmol Vis Sci 2019; 59:2445-2458. [PMID: 29847649 PMCID: PMC5957522 DOI: 10.1167/iovs.18-24086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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] [Indexed: 12/17/2022] Open
Abstract
Purpose The purpose of this study was to determine if the receptor-interacting protein kinase 3 (RIP3) plays a significant role in innate immune responses and death of bystander retinal neurons during murine cytomegalovirus (MCMV) retinal infection, by comparing the innate immune response and cell death in RIP3-depleted mice (Rip3−/−) and Rip3+/+ control mice. Methods Rip3−/− and Rip3+/+ mice were immunosuppressed (IS) and inoculated with MCMV via the supraciliary route. Virus-injected and mock-injected control eyes were removed at days 4, 7, and 10 post infection (p.i.) and markers of innate immunity and cell death were analyzed. Results Compared to Rip3+/+ mice, significantly more MCMV was recovered and more MCMV-infected RPE cells were observed in injected eyes of Rip3−/− mice at days 4 and 7 p.i. In contrast, fewer TUNEL-stained photoreceptors were observed in Rip3−/− eyes than in Rip3+/+ eyes at these times. Electron microscopy showed that significantly more apoptotic photoreceptor cells were present in Rip3+/+ mice than in Rip3−/− mice. Immunohistochemistry showed that the majority of TUNEL-stained photoreceptors died via mitochondrial flavoprotein apoptosis-inducing factor (AIF)-mediated, caspase 3–independent apoptosis. The majority of RIP3-expressing cells in infected eyes were RPE cells, microglia/macrophages, and glia, whereas retinal neurons contained much lower amounts of RIP3. Western blots showed significantly higher levels of activated nuclear factor–κB and caspase 1 were present in Rip3+/+ eyes compared to Rip3−/− eyes. Conclusions Our results suggest that RIP3 enhances innate immune responses against ocular MCMV infection via activation of the inflammasome and nuclear factor–κB, which also leads to inflammation and death of bystander cells by multiple pathways including apoptosis and necroptosis.
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Affiliation(s)
- Jinxian Xu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Juan Mo
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Xinglou Liu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Sally S Atherton
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Zheng Dong
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Sylvia Smith
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
| | - Ming Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, Georgia, United States.,James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, Georgia, United States
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Gunn H, Andrade J, Paul L, Miller L, Stevens K, Creanor S, Green C, Ewings P, Barton A, Berrow M, Vickery J, Marshall B, Marsden J, Freeman J. Balance Right in Multiple Sclerosis (BRiMS): Preliminary results of a randomised controlled feasibility trial. Physiotherapy 2019. [DOI: 10.1016/j.physio.2018.11.281] [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: 10/27/2022]
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Youngs J, Marshall B, Farragher M, Whitney L, Glass S, Pope C, Planche T, Riley P, Carrington D. Implementation of influenza point-of-care testing and patient cohorting during a high-incidence season: a retrospective analysis of impact on infection prevention and control and clinical outcomes. J Hosp Infect 2018; 101:276-284. [PMID: 30471317 DOI: 10.1016/j.jhin.2018.11.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 11/12/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND During high-incidence influenza seasons, a robust infection prevention and control policy is imperative to reduce nosocomial transmission of influenza. AIM To assess the impact of influenza point-of-care testing (POCT) in an emergency department (ED) and patient cohorting on an influenza ward on infection prevention and control and clinical outcomes. METHODS Influenza POCT was operational in the study ED from 21st January 2018 and patient cohorting was operational on an influenza ward from 25th January 2018. A retrospective 'before-after' analysis was performed with pre-intervention defined as 1st November 2017 to 20th January 2018 and post-intervention defined as 21st January 2018 to 30th April 2018. The primary outcome was the rate of hospital-acquired influenza. Secondary outcomes included antiviral prescription and length of stay. The length of time that inpatients remained influenza-positive was estimated by polymerase chain reaction (PCR). FINDINGS There were 654 inpatients with confirmed influenza during the 2017/18 influenza season: 223 pre- and 431 post-intervention. Post-intervention, there were fewer cases of hospital-acquired influenza per day (0.66 vs 0.95, P < 0.0001), median length of stay was shorter (5.5 vs 7.5 days, P = 0.005) and antiviral prescription was more frequent (80% vs 64.1%, P < 0.0001). Cohorting released 779 single rooms for use elsewhere in the trust. The fixed probability of being PCR-negative by the next day (P) was 0.14 [95% confidence interval (CI) 0.12-0.16] for immunocompetent patients. This implies that half of immunocompetent patients are PCR-negative by five days post-diagnosis (95% CI 5-6). CONCLUSION Influenza POCT in an ED and patient cohorting on an influenza ward were associated with reduced nosocomial transmission of influenza and improved patient flow. A policy of retesting immunocompetent patients five days post-diagnosis could allow half of these patients to come out of respiratory isolation earlier.
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Affiliation(s)
- J Youngs
- Infection Care Group, St George's University Hospitals NHS Foundation Trust, London, UK.
| | - B Marshall
- Analytical Services, Ministry of Justice, London, UK
| | - M Farragher
- Infection Prevention and Control Team, St George's University Hospitals NHS Foundation Trust, London, UK
| | - L Whitney
- Pharmacy Department, St George's University Hospitals NHS Foundation Trust, London, UK
| | - S Glass
- Department of Microbiology, East Kent Hospitals University NHS Foundation Trust, Ashford, UK
| | - C Pope
- Infection Care Group, St George's University Hospitals NHS Foundation Trust, London, UK; Institute of Infection and Immunity, St George's University of London, London, UK
| | - T Planche
- Infection Care Group, St George's University Hospitals NHS Foundation Trust, London, UK; Institute of Infection and Immunity, St George's University of London, London, UK
| | - P Riley
- Infection Care Group, St George's University Hospitals NHS Foundation Trust, London, UK; Institute of Infection and Immunity, St George's University of London, London, UK
| | - D Carrington
- Infection Care Group, St George's University Hospitals NHS Foundation Trust, London, UK; Institute of Infection and Immunity, St George's University of London, London, UK
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Volkova N, Evans J, Higgins M, Campbell D, Tian S, Simard C, Sewall A, Nyangoma S, Elbert A, Marshall B, Bilton D. IPD2.02 Real-world outcomes in patients with CF treated with ivacaftor: 2016 US and UK CF Registry analyses. J Cyst Fibros 2018. [DOI: 10.1016/s1569-1993(18)30286-8] [Citation(s) in RCA: 1] [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: 11/30/2022]
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Faro A, Elbert A, Fink A, Wu R, Marshall B. P196 Breastfeeding and higher SES lead to better outcomes in children with CF. J Cyst Fibros 2018. [DOI: 10.1016/s1569-1993(18)30491-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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Volkova N, Evans J, Higgins M, Campbell D, Tian S, Simard C, Sewall A, Nyangoma S, Elbert A, Marshall B, Bilton D. IPD2.01 Disease progression in patients with CF treated with ivacaftor: analyses of real-world data from the US and UK CF Registries. J Cyst Fibros 2018. [DOI: 10.1016/s1569-1993(18)30285-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Xu J, Liu X, Mo J, Marshall B, Perry L, Dong Z, Zhang M. Inflammation and outer blood-retina barrier (BRB) compromise following choroidal murine cytomegalovirus (MCMV) infections. Mol Vis 2018; 24:379-394. [PMID: 29853772 PMCID: PMC5957546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 05/16/2018] [Indexed: 11/25/2022] Open
Abstract
PURPOSE The purpose of this study was to determine whether the blood-retina barrier is compromised by choroidal murine cytomegalovirus (MCMV) infection, using electron microscopy. METHODS BALB/c mice were immunosuppressed with methylprednisolone and monoclonal antibodies to CD4 and CD8. At several time points post-MCMV intraperitoneal inoculation, the eyes were removed and analyzed with western blotting and immunoelectron microscopy for the presence of MCMV early antigen (EA) and the host protein RIP3. Posterior eyecups from RIP3-/- and RIP3+/+ mice were cultured and inoculated with MCMV. At days 4, 7, and 11 post-infection, cultures were collected and analyzed with plaque assay, immunohistochemical staining, and real-time PCR (RT-PCR). RESULTS MCMV EA was observed in the nuclei of vascular endothelial cells and pericytes in the choriocapillaris. Disruption of Bruch's membrane was observed, especially at sites adjacent to activated platelets, and a few RPE cells containing some enlarged vesicles were found directly beneath disrupted Bruch's membrane. Some virus particles were also observed in the enlarged vesicles of RPE cells. Levels of the RIP3 protein, which was observed mainly in the RPE cells and the basement membrane of the choriocapillaris, were greatly increased following MCMV infection, while depletion of RIP3 resulted in greatly decreased inflammasome formation, as well as expression of downstream inflammation factors. CONCLUSIONS The results suggest that systemic MCMV spreads to the choroid and replicates in vascular endothelia and pericytes of the choriocapillaris during immunosuppression. Choroidal MCMV infection is associated with in situ inflammation and subsequent disruption of Bruch's membrane and the outer blood-retina barrier.
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Affiliation(s)
- Jinxian Xu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA,James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA
| | - Xinglou Liu
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA,James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA
| | - Juan Mo
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA
| | - Libby Perry
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA
| | - Zheng Dong
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA,Charlie Norwood VA Medical Center, Augusta, GA
| | - Ming Zhang
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA,James and Jean Vision Discovery Institute, Medical College of Georgia, Augusta University, Augusta, GA
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Ray SC, Baban B, Tucker MA, Seaton AJ, Chang KC, Mannon EC, Sun J, Patel B, Wilson K, Musall JB, Ocasio H, Irsik D, Filosa JA, Sullivan JC, Marshall B, Harris RA, O'Connor PM. Oral NaHCO 3 Activates a Splenic Anti-Inflammatory Pathway: Evidence That Cholinergic Signals Are Transmitted via Mesothelial Cells. J Immunol 2018; 200:3568-3586. [PMID: 29661827 DOI: 10.4049/jimmunol.1701605] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 03/10/2018] [Indexed: 12/15/2022]
Abstract
We tested the hypothesis that oral NaHCO3 intake stimulates splenic anti-inflammatory pathways. Following oral NaHCO3 loading, macrophage polarization was shifted from predominantly M1 (inflammatory) to M2 (regulatory) phenotypes, and FOXP3+CD4+ T-lymphocytes increased in the spleen, blood, and kidneys of rats. Similar anti-inflammatory changes in macrophage polarization were observed in the blood of human subjects following NaHCO3 ingestion. Surprisingly, we found that gentle manipulation to visualize the spleen at midline during surgical laparotomy (sham splenectomy) was sufficient to abolish the response in rats and resulted in hypertrophy/hyperplasia of the capsular mesothelial cells. Thin collagenous connections lined by mesothelial cells were found to connect to the capsular mesothelium. Mesothelial cells in these connections stained positive for the pan-neuronal marker PGP9.5 and acetylcholine esterase and contained many ultrastructural elements, which visually resembled neuronal structures. Both disruption of the fragile mesothelial connections or transection of the vagal nerves resulted in the loss of capsular mesothelial acetylcholine esterase staining and reduced splenic mass. Our data indicate that oral NaHCO3 activates a splenic anti-inflammatory pathway and provides evidence that the signals that mediate this response are transmitted to the spleen via a novel neuronal-like function of mesothelial cells.
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Affiliation(s)
- Sarah C Ray
- Department of Physiology, Augusta University, Augusta, GA 30912
| | - Babak Baban
- Department of Oral Biology, Augusta University, Augusta, GA 30912
| | - Matthew A Tucker
- Georgia Prevention Institute, Augusta University, Augusta, GA 30912; and
| | - Alec J Seaton
- Department of Physiology, Augusta University, Augusta, GA 30912
| | - Kyu Chul Chang
- Department of Physiology, Augusta University, Augusta, GA 30912
| | - Elinor C Mannon
- Department of Physiology, Augusta University, Augusta, GA 30912
| | - Jingping Sun
- Department of Physiology, Augusta University, Augusta, GA 30912
| | - Bansari Patel
- Department of Physiology, Augusta University, Augusta, GA 30912
| | - Katie Wilson
- Department of Physiology, Augusta University, Augusta, GA 30912
| | | | - Hiram Ocasio
- Department of Physiology, Augusta University, Augusta, GA 30912
| | - Debra Irsik
- Department of Physiology, Augusta University, Augusta, GA 30912
| | | | | | - Brendan Marshall
- Department of Cell Biology and Anatomy, Augusta University, Augusta, GA 30912
| | - Ryan A Harris
- Georgia Prevention Institute, Augusta University, Augusta, GA 30912; and
| | - Paul M O'Connor
- Department of Physiology, Augusta University, Augusta, GA 30912;
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O'Connor PM, Marshall B, Baban B, Ocasio H, Wilson K, Sun J, Ray S. Oral NaHCO
3
activates the splenic anti‐inflammatory pathway; evidence vagal efferent signals are transmitted to the spleen via a neuronal like function of mesothelial cells. FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.885.1] [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: 11/11/2022]
Affiliation(s)
- Paul M. O'Connor
- PhysiologyAugsuta University/Medical College of GeorgiaAugustaGA
| | - Brendan Marshall
- Cell Biology and AnatomyAugsuta University/Medical College of GeorgiaAugustaGA
| | - Babak Baban
- PhysiologyAugsuta University/Medical College of GeorgiaAugustaGA
| | - Hiram Ocasio
- PhysiologyAugsuta University/Medical College of GeorgiaAugustaGA
| | - Katie Wilson
- PhysiologyAugsuta University/Medical College of GeorgiaAugustaGA
| | - Jingping Sun
- PhysiologyAugsuta University/Medical College of GeorgiaAugustaGA
| | - Sarah Ray
- PhysiologyAugsuta University/Medical College of GeorgiaAugustaGA
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Qin X, Hoda MN, Susin C, Wheeler JN, Marshall B, Perry L, Saad N, Yin L, Elsayed R, Elsalanty M, Abdelsayed R, Yu JC, Dhandapani KM, Akbari O, Mozaffari MS, Baban B. Increased Innate Lymphoid Cells in Periodontal Tissue of the Murine Model of Periodontitis: The Role of AMP-Activated Protein Kinase and Relevance for the Human Condition. Front Immunol 2017; 8:922. [PMID: 28861078 PMCID: PMC5559469 DOI: 10.3389/fimmu.2017.00922] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 07/20/2017] [Indexed: 12/21/2022] Open
Abstract
Innate lymphoid cells (ILCs) are master regulators of immune and inflammatory responses, but their own regulatory mechanisms and functional roles of their subtypes (i.e., ILC1s-ILC3s) remain largely unresolved. Interestingly, AMP-activated protein kinase (AMPK), influences inflammatory responses, but its role in modulation of ILCs is not known. Periodontitis is a prevalent disorder with impairment of immune and inflammatory responses contributing importantly to its pathogenesis; however, neither the role of ILCs nor AMPK has been explored in this condition. We tested the hypotheses that (a) periodontitis increases ILCs and expression of relevant cytokines thereby contributing to inflammation and (b) knockdown of AMPK worsens indices of periodontitis in association with further increases in subtypes of ILCs and cytokine expression. The studies utilized wild-type (WT) and AMPK knockout (KO) mice, subjected to ligature-induced periodontitis or sham operation, in association with the use of micro-CT for assessment of bone loss, immunogold electron microscopy to show presence of ILCs in periodontal tissues, flow cytometry for quantitative assessment of subtypes of ILCs and RT-polymerase chain reaction analyses to measure mRNA expression of several relevant cytokines. The results for the first time show (a) presence of each subtype of ILCs in periodontal tissues of sham control and periodontitis animals, (b) that periodontitis is associated with increased frequencies of ILC1s-ILC3s with the effect more marked for ILC2s and differential phenotypic marker expression for ILC3s, (c) that AMPK KO mice display exacerbation of indices of periodontitis in association with further increases in the frequency of subtypes of ILCs with persistence of ILC2s effect, and (d) that periodontitis increased mRNA for interleukin (IL)-33, but not IL-5 or IL-13, in WT mice but expression of these cytokines was markedly increased in AMPK KO mice with periodontitis. Subsequently, we showed that human periodontitis is associated with increases in each ILCs subtype with the effect more marked for ILC2s and that mRNA expressions for IL-33 and IL-5 are markedly greater for sites affected by periodontitis than healthy sites. Collectively, these novel observations indicate a pivotal role for ILCs in pathogenesis of periodontitis and that AMPK is a regulator of their phenotype expression in this condition.
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Affiliation(s)
- Xu Qin
- Huazhong University of Science and Technology, Wuhan, China.,Augusta University, Augusta, GA, United States
| | | | | | | | | | - Libby Perry
- Augusta University, Augusta, GA, United States
| | - Nancy Saad
- Augusta University, Augusta, GA, United States
| | - Lin Yin
- Augusta University, Augusta, GA, United States
| | | | | | | | - Jack C Yu
- Augusta University, Augusta, GA, United States
| | | | - Omid Akbari
- University of Southern California, Los Angeles, CA, United States
| | | | - Babak Baban
- Augusta University, Augusta, GA, United States
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Gunn H, Andrade J, Paul L, Miller L, Creanor S, Green C, Marsden J, Ewings P, Berrow M, Vickery J, Barton A, Marshall B, Zajicek J, Freeman JA. Balance Right in Multiple Sclerosis (BRiMS): a guided self-management programme to reduce falls and improve quality of life, balance and mobility in people with secondary progressive multiple sclerosis: a protocol for a feasibility randomised controlled trial. Pilot Feasibility Stud 2017; 4:26. [PMID: 28770099 PMCID: PMC5530568 DOI: 10.1186/s40814-017-0168-1] [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] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 07/03/2017] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Impaired mobility is a cardinal feature of multiple sclerosis (MS) and is rated by people with MS as their highest priority. By the secondary progressive phase, balance, mobility and physical activity levels are significantly compromised; an estimated 70% of people with secondary progressive MS fall regularly. Our ongoing research has systematically developed 'Balance Right in MS' (BRiMS), an innovative, manualised 13-week guided self-management programme tailored to the needs of people with MS, designed to improve safe mobility and minimise falls. Our eventual aim is to assess the clinical and cost effectiveness of BRiMS in people with secondary progressive MS by undertaking an appropriately statistically powered, multi-centre, assessor-blinded definitive, randomised controlled trial. This feasibility study will assess the acceptability of the intervention and test the achievability of running such a definitive trial. METHODS/DESIGN This is a pragmatic multi-centre feasibility randomised controlled trial with blinded outcome assessment. Sixty ambulant people with secondary progressive MS who self-report two or more falls in the previous 6 months will be randomly allocated (1:1) to either the BRiMS programme plus usual care or to usual care alone. All participants will be assessed at baseline and followed up at 15 weeks and 27 weeks post-randomisation. The outcomes of this feasibility trial include:Feasibility outcomes, including trial recruitment, retention and completionAssessment of the proposed outcome measures for the anticipated definitive trial (including measures of walking, quality of life, falls, balance and activity level)Measures of adherence to the BRiMS programmeData to inform the economic evaluation in a future trialProcess evaluation (assessment of treatment fidelity and qualitative evaluation of participant and treating therapist experience). DISCUSSION The BRiMS intervention aims to address a key concern for MS service users and providers. However, there are several uncertainties which need to be addressed prior to progressing to a full-scale trial, including acceptability of the BRiMS intervention and practicality of the trial procedures. This feasibility trial will provide important insights to resolve these uncertainties and will enable a protocol to be finalised for use in the definitive trial. TRIAL REGISTRATION ISRCTN13587999.
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Affiliation(s)
- H. Gunn
- Faculty of Health and Human Sciences, School of Health Professions, Plymouth University, Peninsula Allied Health Centre, Derriford Rd, Plymouth, PL6 8BH UK
| | - J. Andrade
- Faculty of Health and Human Sciences, School of Psychology, Portland Square Building, Drake Circus Campus, Plymouth, PL4 8AA UK
| | - L. Paul
- School of Health & Life Sciences, Glasgow Caledonian University, Cowcaddens Road, Glasgow, G4 0BA UK
| | - L. Miller
- School of Health & Life Sciences, Glasgow Caledonian University, Cowcaddens Road, Glasgow, G4 0BA UK
- Douglas Grant Rehabilitation Unit, Ayrshire Central Hospital, Kilwinning Road, Irvine, KA12 8SS UK
| | - S. Creanor
- Peninsula Schools of Medicine and Dentistry, Peninsula Clinical Trials Unit at Plymouth University (PenCTU), Room N16, Plymouth Science Park, Plymouth, PL6 8BX UK
- Medical Statistics, Peninsula Schools of Medicine and Dentistry, Room N15, Plymouth Science Park, Plymouth, PL6 8BX UK
| | - C. Green
- University of Exeter Medical School, Health Economics Group, University of Exeter, St Luke’s Campus, Exeter, EX1 2 LU UK
| | - J. Marsden
- Faculty of Health and Human Sciences, School of Health Professions, Plymouth University, Peninsula Allied Health Centre, Derriford Rd, Plymouth, PL6 8BH UK
| | - P. Ewings
- NIHR Research Design Service (South West), Musgrove Park Hospital, Taunton, TA1 5DA UK
| | - M. Berrow
- Peninsula Schools of Medicine and Dentistry, Peninsula Clinical Trials Unit at Plymouth University (PenCTU), Room N16, Plymouth Science Park, Plymouth, PL6 8BX UK
| | - J. Vickery
- Peninsula Schools of Medicine and Dentistry, Peninsula Clinical Trials Unit at Plymouth University (PenCTU), Room N16, Plymouth Science Park, Plymouth, PL6 8BX UK
| | - A. Barton
- NIHR Research Design Service, Peninsula Schools of Medicine and Dentistry, ITTC Building, Plymouth Science Park, Plymouth, PL6 8BX UK
| | | | - J. Zajicek
- School of Medicine, Medical and Biological Sciences, University of St Andrews, North Haugh, St Andrews, KY16 9TF UK
| | - J. A. Freeman
- Faculty of Health and Human Sciences, School of Health Professions, Plymouth University, Peninsula Allied Health Centre, Derriford Rd, Plymouth, PL6 8BH UK
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Katz S, Marshall B. TRACKED AND FIT: FITBITS, BRAIN GAMES, AND THE QUANTIFICATION OF THE AGING BODY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.3373] [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)
- S. Katz
- Sociology, Trent University, Toronto, Ontario, Canada,
- Centre for Aging and Society, Peterborough, Ontario, Canada
| | - B. Marshall
- Sociology, Trent University, Toronto, Ontario, Canada,
- Centre for Aging and Society, Peterborough, Ontario, Canada
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Wright D, Wood G, Franklin Z, Marshall B, Riach M, Holmes P. Directing gaze behaviour during action observation modulates corticospinal excitability. Brain Stimul 2017. [DOI: 10.1016/j.brs.2017.01.212] [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: 10/20/2022] Open
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Prasad M, Pawlak KJ, Burak WE, Perry EE, Marshall B, Whittal RM, Bose HS. Mitochondrial metabolic regulation by GRP78. Sci Adv 2017; 3:e1602038. [PMID: 28275724 PMCID: PMC5325540 DOI: 10.1126/sciadv.1602038] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 01/25/2017] [Indexed: 05/08/2023]
Abstract
Steroids, essential for mammalian survival, are initiated by cholesterol transport by steroidogenic acute regulatory protein (StAR). Appropriate protein folding is an essential requirement of activity. Endoplasmic reticulum (ER) chaperones assist in folding of cytoplasmic proteins, whereas mitochondrial chaperones fold only mitochondrial proteins. We show that glucose regulatory protein 78 (GRP78), a master ER chaperone, is also present at the mitochondria-associated ER membrane (MAM), where it folds StAR for delivery to the outer mitochondrial membrane. StAR expression and activity are drastically reduced following GRP78 knockdown. StAR folding starts at the MAM region; thus, its cholesterol fostering capacity is regulated by GRP78 long before StAR reaches the mitochondria. In summary, GRP78 is an acute regulator of steroidogenesis at the MAM, regulating the intermediate folding of StAR that is crucial for its activity.
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Affiliation(s)
- Manoj Prasad
- Laboratory of Biochemistry and Cell Biology, Department of Biomedical Sciences, Mercer University School of Medicine, Savannah, GA 31404, USA
| | - Kevin J. Pawlak
- Laboratory of Biochemistry and Cell Biology, Department of Biomedical Sciences, Mercer University School of Medicine, Savannah, GA 31404, USA
| | - William E. Burak
- Laboratory of Biochemistry and Cell Biology, Department of Biomedical Sciences, Mercer University School of Medicine, Savannah, GA 31404, USA
- Anderson Cancer Institute, Memorial University Medical Center, Savannah, GA 31404, USA
| | - Elizabeth E. Perry
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA
| | - Brendan Marshall
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA
| | - Randy M. Whittal
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Himangshu S. Bose
- Laboratory of Biochemistry and Cell Biology, Department of Biomedical Sciences, Mercer University School of Medicine, Savannah, GA 31404, USA
- Anderson Cancer Institute, Memorial University Medical Center, Savannah, GA 31404, USA
- Corresponding author.
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Dong J, Zhu J, Marshall B, Linde-Rosen M, Smolinski P, Fu F. A comparison of two superficial MCL reconstruction includiing single-bundle anterior cruciate ligament (ACL) reconstruction. Asia Pac J Sports Med Arthrosc Rehabil Technol 2016. [DOI: 10.1016/j.asmart.2016.07.056] [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: 10/20/2022] Open
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49
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Christidis T, Pintar KDM, Butler AJ, Nesbitt A, Thomas MK, Marshall B, Pollari F. Campylobacter spp. Prevalence and Levels in Raw Milk: A Systematic Review and Meta-Analysis. J Food Prot 2016; 79:1775-1783. [PMID: 28221843 DOI: 10.4315/0362-028x.jfp-15-480] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Campylobacteriosis is the leading bacterial gastrointestinal disease internationally, contributing significantly to the enteric illness burden. Cases have been associated with the consumption of raw milk, a behavior that has garnered attention recently. Estimates of the prevalence and levels of Campylobacter spp. in raw milk are lacking, which hinders risk assessment attempts. This article is a systematic review and meta-analysis of reported prevalence and levels of zoonotic Campylobacter spp. in the raw milk of cows, goats, and sheep in Canada, the United States, Europe, Australia, and New Zealand. The relevant literature was reviewed, and trained reviewers examined the results for inclusion of articles in the meta-analysis. Relevant data (prevalence and/or level of Campylobacter in raw milk, country of origin, animal species, sample source, Campylobacter species identified, etc.) were extracted, and a meta-analysis was performed in Stata v. 12 (Metaprop command). The weighted mean prevalence of Campylobacter spp. in raw milk samples was 1.18%. Subgroup analyses were conducted to examine how prevalence varied by study characteristics, with the highest prevalence values in studies from the United Kingdom (by country, 6.4%), about cows (by animal species, 1.3%), and including samples taken from inline filters (by sample source, 1.75%) and in studies that included species that are not pathogenic to humans (by Campylobacter species, 1.14%). Two articles each included a single Campylobacter level, 0.16 ± 0.3 and approximately 0.047 most probable number per ml. Despite a relatively low prevalence, consumption of raw milk is inherently risky because no treatment has been used to inactivate pathogens. This potential risk further supports maintaining regulations to limit the sales of raw milk.
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Affiliation(s)
- T Christidis
- Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Ottawa, Ontario, Canada K1A 0K9
| | - K D M Pintar
- Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Ottawa, Ontario, Canada K1A 0K9
| | - A J Butler
- Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Ottawa, Ontario, Canada K1A 0K9
| | - A Nesbitt
- Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Ottawa, Ontario, Canada K1A 0K9
| | - M K Thomas
- Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Ottawa, Ontario, Canada K1A 0K9
| | - B Marshall
- Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Ottawa, Ontario, Canada K1A 0K9
| | - F Pollari
- Centre for Food-borne, Environmental and Zoonotic Infectious Diseases, Public Health Agency of Canada, Ottawa, Ontario, Canada K1A 0K9
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Simmerman E, Qin X, Marshall B, Perry L, Cai L, Wang T, Yu J, Akbari O, Baban B. Innate lymphoid cells: a paradigm for low SSI in cleft lip repair. J Surg Res 2016; 205:312-317. [PMID: 27664878 DOI: 10.1016/j.jss.2016.06.081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 05/20/2016] [Accepted: 06/26/2016] [Indexed: 11/17/2022]
Abstract
BACKGROUND Cleft lip and palate reconstructions demonstrate significantly lower surgical site infection rates compared with clean-contaminated cases, prompting investigation into the pathophysiology causing this discrepancy. Recent studies have identified a new group of innate lymphocytes called innate lymphoid cells (ILCs), located in barrier surfaces of the skin, airways, and intestine. Our objectives were to explore for the first time the presence of ILCs in the vermillion of neonates and young children undergoing cleft lip reconstruction and characterize their composition by measuring the three classes of ILCs. MATERIALS AND METHODS Lip tissue samples were collected from 13 subjects undergoing vermillion resection during cleft lip reconstructive surgery. Preparative, transmission electron microscopy, and analytical flow cytometry were performed. The functionality of ILCs was tested in terms of their capacity to produce type 1 (IFN-γ/TNF-α), type 2 (IL-5/IL-13), and type 3 (IL-17/IL-22) cytokines. Data were analyzed using Student t test or the analysis of variance to establish significance (P < 0.05) among groups for all other data. RESULTS All three classes of ILCs were detected and visualized in the tissue samples. In all samples, the level of ILC2 subset was significantly higher than the other two ILC subsets (P < 0.01), followed by the ILC1 subset, which was present in significantly higher levels than the ILC3 subset (P < 0.05). CONCLUSIONS Our data place ILCs for the first time in the interface of oral mucosal immunity, tissue microenvironment, and homeostasis during and after tissue development, possibly explaining lower infection rates in cleft lip or palate reconstructions.
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Affiliation(s)
- Erika Simmerman
- Department of Oral Biology, Augusta University, Augusta, Georgia; Department of Surgery, Division of Plastic Surgery, Augusta University, Augusta, Georgia
| | - Xu Qin
- Department of Oral Biology, Augusta University, Augusta, Georgia
| | - Brendan Marshall
- Department of Cellular Biology/Electron Microscopy and Histology Core, Augusta University, Augusta, Georgia
| | - Libby Perry
- Department of Cellular Biology/Electron Microscopy and Histology Core, Augusta University, Augusta, Georgia
| | - Lei Cai
- Department of Oral Biology, Augusta University, Augusta, Georgia
| | - Tailing Wang
- Department of Oral Biology, Augusta University, Augusta, Georgia
| | - Jack Yu
- Department of Oral Biology, Augusta University, Augusta, Georgia; Department of Surgery, Division of Plastic Surgery, Augusta University, Augusta, Georgia
| | - Omid Akbari
- Department of Microbiology and Immunology, University of Southern California, Los Angeles, California
| | - Babak Baban
- Department of Oral Biology, Augusta University, Augusta, Georgia.
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