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Effects of empagliflozin on progression of chronic kidney disease: a prespecified secondary analysis from the empa-kidney trial. Lancet Diabetes Endocrinol 2024; 12:39-50. [PMID: 38061371 PMCID: PMC7615591 DOI: 10.1016/s2213-8587(23)00321-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Sodium-glucose co-transporter-2 (SGLT2) inhibitors reduce progression of chronic kidney disease and the risk of cardiovascular morbidity and mortality in a wide range of patients. However, their effects on kidney disease progression in some patients with chronic kidney disease are unclear because few clinical kidney outcomes occurred among such patients in the completed trials. In particular, some guidelines stratify their level of recommendation about who should be treated with SGLT2 inhibitors based on diabetes status and albuminuria. We aimed to assess the effects of empagliflozin on progression of chronic kidney disease both overall and among specific types of participants in the EMPA-KIDNEY trial. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA), and included individuals aged 18 years or older with an estimated glomerular filtration rate (eGFR) of 20 to less than 45 mL/min per 1·73 m2, or with an eGFR of 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher. We explored the effects of 10 mg oral empagliflozin once daily versus placebo on the annualised rate of change in estimated glomerular filtration rate (eGFR slope), a tertiary outcome. We studied the acute slope (from randomisation to 2 months) and chronic slope (from 2 months onwards) separately, using shared parameter models to estimate the latter. Analyses were done in all randomly assigned participants by intention to treat. EMPA-KIDNEY is registered at ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and then followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroups of eGFR included 2282 (34·5%) participants with an eGFR of less than 30 mL/min per 1·73 m2, 2928 (44·3%) with an eGFR of 30 to less than 45 mL/min per 1·73 m2, and 1399 (21·2%) with an eGFR 45 mL/min per 1·73 m2 or higher. Prespecified subgroups of uACR included 1328 (20·1%) with a uACR of less than 30 mg/g, 1864 (28·2%) with a uACR of 30 to 300 mg/g, and 3417 (51·7%) with a uACR of more than 300 mg/g. Overall, allocation to empagliflozin caused an acute 2·12 mL/min per 1·73 m2 (95% CI 1·83-2·41) reduction in eGFR, equivalent to a 6% (5-6) dip in the first 2 months. After this, it halved the chronic slope from -2·75 to -1·37 mL/min per 1·73 m2 per year (relative difference 50%, 95% CI 42-58). The absolute and relative benefits of empagliflozin on the magnitude of the chronic slope varied significantly depending on diabetes status and baseline levels of eGFR and uACR. In particular, the absolute difference in chronic slopes was lower in patients with lower baseline uACR, but because this group progressed more slowly than those with higher uACR, this translated to a larger relative difference in chronic slopes in this group (86% [36-136] reduction in the chronic slope among those with baseline uACR <30 mg/g compared with a 29% [19-38] reduction for those with baseline uACR ≥2000 mg/g; ptrend<0·0001). INTERPRETATION Empagliflozin slowed the rate of progression of chronic kidney disease among all types of participant in the EMPA-KIDNEY trial, including those with little albuminuria. Albuminuria alone should not be used to determine whether to treat with an SGLT2 inhibitor. FUNDING Boehringer Ingelheim and Eli Lilly.
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Impact of primary kidney disease on the effects of empagliflozin in patients with chronic kidney disease: secondary analyses of the EMPA-KIDNEY trial. Lancet Diabetes Endocrinol 2024; 12:51-60. [PMID: 38061372 DOI: 10.1016/s2213-8587(23)00322-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND The EMPA-KIDNEY trial showed that empagliflozin reduced the risk of the primary composite outcome of kidney disease progression or cardiovascular death in patients with chronic kidney disease mainly through slowing progression. We aimed to assess how effects of empagliflozin might differ by primary kidney disease across its broad population. METHODS EMPA-KIDNEY, a randomised, controlled, phase 3 trial, was conducted at 241 centres in eight countries (Canada, China, Germany, Italy, Japan, Malaysia, the UK, and the USA). Patients were eligible if their estimated glomerular filtration rate (eGFR) was 20 to less than 45 mL/min per 1·73 m2, or 45 to less than 90 mL/min per 1·73 m2 with a urinary albumin-to-creatinine ratio (uACR) of 200 mg/g or higher at screening. They were randomly assigned (1:1) to 10 mg oral empagliflozin once daily or matching placebo. Effects on kidney disease progression (defined as a sustained ≥40% eGFR decline from randomisation, end-stage kidney disease, a sustained eGFR below 10 mL/min per 1·73 m2, or death from kidney failure) were assessed using prespecified Cox models, and eGFR slope analyses used shared parameter models. Subgroup comparisons were performed by including relevant interaction terms in models. EMPA-KIDNEY is registered with ClinicalTrials.gov, NCT03594110. FINDINGS Between May 15, 2019, and April 16, 2021, 6609 participants were randomly assigned and followed up for a median of 2·0 years (IQR 1·5-2·4). Prespecified subgroupings by primary kidney disease included 2057 (31·1%) participants with diabetic kidney disease, 1669 (25·3%) with glomerular disease, 1445 (21·9%) with hypertensive or renovascular disease, and 1438 (21·8%) with other or unknown causes. Kidney disease progression occurred in 384 (11·6%) of 3304 patients in the empagliflozin group and 504 (15·2%) of 3305 patients in the placebo group (hazard ratio 0·71 [95% CI 0·62-0·81]), with no evidence that the relative effect size varied significantly by primary kidney disease (pheterogeneity=0·62). The between-group difference in chronic eGFR slopes (ie, from 2 months to final follow-up) was 1·37 mL/min per 1·73 m2 per year (95% CI 1·16-1·59), representing a 50% (42-58) reduction in the rate of chronic eGFR decline. This relative effect of empagliflozin on chronic eGFR slope was similar in analyses by different primary kidney diseases, including in explorations by type of glomerular disease and diabetes (p values for heterogeneity all >0·1). INTERPRETATION In a broad range of patients with chronic kidney disease at risk of progression, including a wide range of non-diabetic causes of chronic kidney disease, empagliflozin reduced risk of kidney disease progression. Relative effect sizes were broadly similar irrespective of the cause of primary kidney disease, suggesting that SGLT2 inhibitors should be part of a standard of care to minimise risk of kidney failure in chronic kidney disease. FUNDING Boehringer Ingelheim, Eli Lilly, and UK Medical Research Council.
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M, Sukumar S, Tan TSE, Chohan K, Dhuna S, Haq T, Kirby S, Lacy-Colson J, Logan P, Malik Q, McCann J, Mughal Z, Sadiq S, Sharif I, Shingles C, Simon A, Burnage S, Chan SSN, Craig ARJ, Duffield J, Dutta A, Eastwood M, Iqbal F, Mahmood F, Mahmood W, Patel C, Qadeer A, Robinson A, Rotundo A, Schade A, Slade RD, De Freitas M, Kinnersley H, McDowell E, Moens-Lecumberri S, Ramsden J, Rockall T, Wiffen L, Wright S, Bruce C, Francois V, Hamdan K, Limb C, Lunt AJ, Manley L, Marks M, Phillips CFE, Agnew CJF, Barr CJ, Benons N, Hart SJ, Kandage D, Krysztopik R, Mahalingam P, Mock J, Rajendran S, Stoddart MT, Clements B, Gillespie H, Lee S, McDougall R, Murray C, O'Loane R, Periketi S, Tan S, Amoah R, Bhudia R, Dudley B, Gilbert A, Griffiths B, Khan H, McKigney N, Roberts B, Samuel R, Seelarbokus A, Stubbing-Moore A, Thompson G, Williams P, Ahmed N, Akhtar R, Chandler E, Chappelow I, Gil H, Gower T, Kale A, Lingam G, Rutler L, Sellahewa C, Sheikh A, Stringer H, Taylor R, Aglan H, Ashraf MR, Choo S, Das E, Epstein J, Gentry R, Mills D, Poolovadoo Y, Ward N, Bull K, Cole A, Hack J, Khawari S, Lake C, Mandishona T, Perry R, Sleight S, Sultan S, Thornton T, Williams S, Arif T, Castle A, Chauhan P, Chesner R, Eilon T, Kamarajah S, Kambasha C, Lock L, Loka T, Mohammad F, Motahariasl S, Roper L, Sadhra SS, Sheikh A, Toma T, Wadood Q, Yip J, Ainger E, Busti S, Cunliffe L, Flamini T, Gaffing S, Moorcroft C, Peter M, Simpson L, Stokes E, Stott G, Wilson J, York J, Yousaf A, Borakati A, Brown M, Goaman A, Hodgson B, Ijeomah A, Iroegbu U, Kaur G, Lowe C, Mahmood S, Sattar Z, Sen P, Szuman A, Abbas N, Al-Ausi M, Anto N, Bhome R, Eccles L, Elliott J, Hughes EJ, Jones A, Karunatilleke AS, Knight JS, Manson CCF, Mekhail I, Michaels L, Noton TM, Okenyi E, Reeves T, Yasin IH, Banfield DA, Harris R, Lim D, Mason-Apps C, Roe T, Sandhu J, Shafiq N, Stickler E, Tam JP, Williams LM, Ainsworth P, Boualbanat Y, Doull C, Egan E, Evans L, Hassanin K, Ninkovic-Hall G, Odunlami W, Shergill M, Traish M, Cummings D, Kershaw S, Ong J, Reid F, Toellner H, Alwandi A, Amer M, George D, Haynes K, Hughes K, Peakall L, Premakumar Y, Punjabi N, Ramwell A, Sawkins H, Ashwood J, Baker A, Baron C, Bhide I, Blake E, De Cates C, Esmail R, Hosamuddin H, Kapp J, Nguru N, Raja M, Thomson F, Ahmed H, Aishwarya G, Al-Huneidi R, Ali S, Aziz R, Burke D, Clarke B, Kausar A, Maskill D, Mecia L, Myers L, Smith ACD, Walker G, Wroe N, Donohoe C, Gibbons D, Jordan P, Keogh C, Kiely A, Lalor P, McCrohan M, Powell C, Foley MP, Reynolds J, Silke E, Thorpe O, Kong JTH, White C, Ali Q, Dalrymple J, Ge Y, Khan H, Luo RS, Paine H, Paraskeva B, Parker L, Pillai K, Salciccioli J, Selvadurai S, Sonagara V, Springford LR, Tan L, Appleton S, Leadholm N, Zhang Y, Ahern D, Cotter M, Cremen S, Durrigan T, Flack V, Hrvacic N, Jones H, Jong B, Keane K, O'Connell PR, O'sullivan J, Pek G, Shirazi S, Barker C, Brown A, Carr W, Chen Y, Guillotte C, Harte J, Kokayi A, Lau K, McFarlane S, Morrison S, Broad J, Kenefick N, Makanji D, Printz V, Saito R, Thomas O, Breen H, Kirk S, Kong CH, O'Kane A, Eddama M, Engledow A, Freeman SK, Frost A, Goh C, Lee G, Poonawala R, Suri A, Taribagil P, Brown H, Christie S, Dean S, Gravell R, Haywood E, Holt F, Pilsworth E, Rabiu R, Roscoe HW, Shergill S, Sriram A, Sureshkumar A, Tan LC, Tanna A, Vakharia A, Bhullar S, Brannick S, Dunne E, Frere M, Kerin M, Kumar KM, Pratumsuwan T, Quek R, Salman M, Van Den Berg N, Wong C, Ahluwalia J, Bagga R, Borg CM, Calabria C, Draper A, Farwana M, Joyce H, Khan A, Mazza M, Pankin G, Sait MS, Sandhu N, Virani N, Wong J, Woodhams K, Croghan N, Ghag S, Hogg G, Ismail O, John N, Nadeem K, Naqi M, Noe SM, Sharma A, Tan S, Begum F, Best R, Collishaw A, Glasbey J, Golding D, Gwilym B, Harrison P, Jackman T, Lewis N, Luk YL, Porter T, Potluri S, Stechman M, Tate S, Thomas D, Walford B, Auld F, Bleakley A, Johnston S, Jones C, Khaw J, Milne S, O'Neill S, Singh KKR, Smith R, Swan A, Thorley N, Yalamarthi S, Yin ZD, Ali A, Balian V, Bana R, Clark K, Livesey C, McLachlan G, Mohammad M, Pranesh N, Richards C, Ross F, Sajid M, Brooke M, Francombe J, Gresly J, Hutchinson S, Kerrigan K, Matthews E, Nur S, Parsons L, Sandhu A, Vyas M, White F, Zulkifli A, Zuzarte L, Al-Mousawi A, Arya J, Azam S, Yahaya AA, Gill K, Hallan R, Hathaway C, Leptidis I, McDonagh L, Mitrasinovic S, Mushtaq N, Pang N, Peiris GB, Rinkoff S, Chan L, Christopher E, Farhan-Alanie MMH, Gonzalez-Ciscar A, Graham CJ, Lim H, McLean KA, Paterson HM, Rogers A, Roy C, Rutherford D, Smith F, Zubikarai G, Al-Khudairi R, Bamford M, Chang M, Cheng J, Hedley C, Joseph R, Mitchell B, Perera S, Rothwell L, Siddiqui A, Smith J, Taylor K, Wright OW, Baryan HK, Boyd G, Conchie H, Cox L, Davies J, Gardner S, Hill N, Krishna K, Lakin F, Scotcher S, Alberts J, Asad M, Barraclough J, Campbell A, Marshall D, Wakeford W, Cronbach P, D'Souza F, Gammeri E, Houlton J, Hall M, Kethees A, Patel R, Perera M, Prowle J, Shaid M, Webb E, Beattie S, Chadwick M, El-Taji O, Haddad S, Mann M, Patel M, Popat K, Rimmer L, Riyat H, Smith H, Anandarajah C, Cipparrone M, Desai K, Gao C, Goh ET, Howlader M, Jeffreys N, Karmarkar A, Mathew G, Mukhtar H, Ozcan E, Renukanthan A, Sarens N, Sinha C, Woolley A, Bogle R, Komolafe O, Loo F, Waugh D, Zeng R, Crewe A, Mathias J, Mills A, Owen A, Prior A, Saunders I, Baker A, Crilly L, McKeon J, Ubhi HK, Adeogun A, Carr R, Davison C, Devalia S, Hayat A, Karsan RB, Osborne C, Scott K, Weegenaar C, Wijeyaratne M, Babatunde F, Barnor-Ahiaku E, Beattie G, Chitsabesan P, Dixon O, Hall N, Ilenkovan N, Mackrell T, Nithianandasivam N, Orr J, Palazzo F, Saad M, Sandland-Taylor L, Sherlock J, Ashdown T, Chandler S, Garsaa T, Lloyd J, Loh SY, Ng S, Perkins C, Powell-Chandler A, Smith F, Underhill R. Perioperative intravenous contrast administration and the incidence of acute kidney injury after major gastrointestinal surgery: prospective, multicentre cohort study. Br J Surg 2020; 107:1023-1032. [PMID: 32026470 DOI: 10.1002/bjs.11453] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 09/21/2019] [Accepted: 11/08/2019] [Indexed: 01/14/2023]
Abstract
BACKGROUND This study aimed to determine the impact of preoperative exposure to intravenous contrast for CT and the risk of developing postoperative acute kidney injury (AKI) in patients undergoing major gastrointestinal surgery. METHODS This prospective, multicentre cohort study included adults undergoing gastrointestinal resection, stoma reversal or liver resection. Both elective and emergency procedures were included. Preoperative exposure to intravenous contrast was defined as exposure to contrast administered for the purposes of CT up to 7 days before surgery. The primary endpoint was the rate of AKI within 7 days. Propensity score-matched models were adjusted for patient, disease and operative variables. In a sensitivity analysis, a propensity score-matched model explored the association between preoperative exposure to contrast and AKI in the first 48 h after surgery. RESULTS A total of 5378 patients were included across 173 centres. Overall, 1249 patients (23·2 per cent) received intravenous contrast. The overall rate of AKI within 7 days of surgery was 13·4 per cent (718 of 5378). In the propensity score-matched model, preoperative exposure to contrast was not associated with AKI within 7 days (odds ratio (OR) 0·95, 95 per cent c.i. 0·73 to 1·21; P = 0·669). The sensitivity analysis showed no association between preoperative contrast administration and AKI within 48 h after operation (OR 1·09, 0·84 to 1·41; P = 0·498). CONCLUSION There was no association between preoperative intravenous contrast administered for CT up to 7 days before surgery and postoperative AKI. Risk of contrast-induced nephropathy should not be used as a reason to avoid contrast-enhanced CT.
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Abstract
Excess adiposity is a risk factor for several cancer types. This is likely due to complex mechanisms including alterations in the lipid milieu that plays a pivotal role in multiple aspects of carcinogenesis. Here we consider the direct role of lipids in regulating well-known hallmarks of cancer. Furthermore, we suggest that obesity-associated remodelling of membranes and organelles drives cancer cell proliferation and invasion. Identification of cancer-related lipid-mediated mechanisms amongst the broad metabolic disturbances due to excess adiposity is central to the identification of novel and more efficacious prevention and intervention strategies.
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Affiliation(s)
- J Molendijk
- QIMR Berghofer Medical Research Institute, Herston, Brisbane, 4006, Australia.
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Gilmore JS, Russell GJ, Robinson H, Prael RE. Fertile-to-Fissile and Fission Measurements for Depleted Uranium and Thorium Bombarded by 800-MeV Protons. NUCL SCI ENG 2017. [DOI: 10.13182/nse88-a23544] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- J. S. Gilmore
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - G. J. Russell
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - H. Robinson
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - R. E. Prael
- Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
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Walker NJ, van Woerden HC, Kiparoglou V, Yang Y, Robinson H, Croghan E. Erratum to: Gender difference and effect of pharmacotherapy: findings from a smoking cessation service. BMC Public Health 2017; 17:294. [PMID: 28376840 PMCID: PMC5379586 DOI: 10.1186/s12889-017-4205-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 03/29/2017] [Indexed: 11/10/2022] Open
Affiliation(s)
- N J Walker
- Oxford Biomedical Research Centre, Churchill Hospital, Oxford, England.
| | - H C van Woerden
- Institute of Primary Care & Public Health, Cardiff University, Cardiff, Wales.,Centre for Health Sciences, University of the Highlands and Islands, Inverness, Scotland
| | - V Kiparoglou
- Oxford Biomedical Research Centre, Churchill Hospital, Oxford, England
| | - Y Yang
- Nuffield Department of Primary Care Health Science, University of Oxford, Oxford, England
| | - H Robinson
- Quit 51 Stop Smoking Service, Burton-on-, Trent, England
| | - E Croghan
- Quit 51 Stop Smoking Service, Burton-on-, Trent, England
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Robinson H, Lam P, Walton J, Murrell G. The effect of rotator cuff retear on early overhead shoulder function: A study in 1600 consecutive rotator cuff repairs. J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.01.071] [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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Rawlinson G, Milston A, Clayton S, Fisher S, Roddam H, Nuttall D, Gurbutt D, Robinson H, Gaskins N, Poala D. Embedding Public Health (PH) in physiotherapy practice: outcomes of a region-wide, Allied Health Professional (AHP) training programme. Physiotherapy 2016. [DOI: 10.1016/j.physio.2016.10.193] [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]
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Ofir-Rosenfeld Y, Arnaudo N, Enjalbert F, Harrigan J, Woodrow M, Jones A, Kemp M, Robinson H, Jacq X. Development of a drug discovery platform focused on SENPs as therapeutic targets for oncology. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61438-7] [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: 10/21/2022]
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Holloway C, Robinson H, Rees D, McDowell J, Andrews S, Joshi A, Jolliffe V, Trickey J, Peall A. AB1114-HPR Biologic Dose Tapering Improves Patient Care and Advances The Rheumatology Service. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.2169] [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: 11/04/2022]
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Trickey J, Holloway C, Robinson H, McDowell J, Andrews S, Jolliffe V, Joshi A, Rees D, Peall A. AB0351 Biologic Tapering in Rheumatoid Arthritis: Initial Experiences in An English District General Hospital. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.5551] [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: 11/03/2022]
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Bhatia N, Sarwal S, Robinson H, Geduld J, Huneault F, Schreiner H, Collins S, Hickey R. Federal public health strategies to minimize the importation of communicable diseases into Canada. Can Commun Dis Rep 2015; 41:3-8. [PMID: 29769971 PMCID: PMC5868714 DOI: 10.14745/ccdr.v41is6a01] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND The global spread of communicable diseases is a growing concern largely as a result of increased international travel. In Canada, although most public health management of communicable diseases occurs at the front line, the federal government also takes actions to prevent and mitigate their importation. OBJECTIVE To describe the role of the Public Health Agency of Canada (PHAC) in minimizing the importation of communicable diseases through preventive measures taken before travellers leave Canada and through early detection and prompt containment measures taken when travellers arrive in the country with a potential communicable disease. INTERVENTIONS PHAC works to minimize the importation of communicable diseases into Canada by developing evidence-based travel health advice and targeted outreach activities geared to the public and to health care professionals. On the basis of the Quarantine Act and the International Health Regulations (2005), PHAC also conducts inspections of conveyances such as aircraft and boats and works with partners to conduct border screening to assess ill travellers entering the country. CONCLUSION PHAC plays an important role in preventing and minimizing the importation of communicable diseases into Canada in conjunction with clinicians, public health authorities at all levels of government and other federal government departments.
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Affiliation(s)
- N Bhatia
- Schulich School of Family Medicine and Dentistry, University of Western Ontario, London, ON
| | - S Sarwal
- Health Security Infrastructure Branch, Public Health Agency of Canada, Ottawa, ON
| | - H Robinson
- Health Security Infrastructure Branch, Public Health Agency of Canada, Ottawa, ON
| | - J Geduld
- Health Security Infrastructure Branch, Public Health Agency of Canada, Ottawa, ON
| | - F Huneault
- Health Security Infrastructure Branch, Public Health Agency of Canada, Ottawa, ON
| | - H Schreiner
- Health Security Infrastructure Branch, Public Health Agency of Canada, Ottawa, ON
| | - S Collins
- Health Security Infrastructure Branch, Public Health Agency of Canada, Ottawa, ON
| | - R Hickey
- Health Security Infrastructure Branch, Public Health Agency of Canada, Ottawa, ON
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Brown A, Barrett JES, Robinson H, Potgieter-Vermaak S. Risk assessment of exposure to particulate output of a demolition site. Environ Geochem Health 2015; 37:675-687. [PMID: 26173774 DOI: 10.1007/s10653-015-9747-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 07/08/2015] [Indexed: 06/04/2023]
Abstract
Whilst vehicular and industrial contributions to the airborne particulate budget are well explored, the input due to building demolition is relatively unknown. Air quality is of importance to human health, and it is well known that composition of airborne particles can have a significant influence on both chronic and acute health effects. Road dust (RD) was collected before and after the demolition of a large building to elucidate changes in elemental profile. Rainfall and PM10 mass concentration data aided interpretation of the elemental data. Quantification of Al, As, Ba, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, Pb, Rh, S, Si, Sn, Ti, V and Zn was carried out. It was found that only Al, K, Mg, Si and S increased in concentration across all size fractions after the building demolition. Risk assessment was then carried out on elements with applicable reference dose values to assess the potential health risks due to the demolition. Significant risk to children was observed for chromium and aluminium exposure. PM10, monitored 40 metres from the demolition site, indicated no abnormal concentrations during the demolition; however, rainfall data were shown to affect the concentration of PM10. The elemental data observed in this study could possibly indicate the role of increased sulphur concentrations (in this case as a result of the demolition) on the buffer capacity of RD, hence leaching metals into rainwater.
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Affiliation(s)
- A Brown
- Division of Chemistry and Environmental Science, Manchester Metropolitan University, Manchester, M1 5GD, UK,
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Mylrea Lowndes B, Mercer M, Robinson H. Abandoning the National Early Warning Score in our district general hospital. Crit Care 2014. [PMCID: PMC4068227 DOI: 10.1186/cc13251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Palmer S, Ruospo M, Pellgrini F, Strippoli GFM, Palmer S, Ruospo M, Natale P, Saglimbene V, Pellegrini F, Craig JC, Hegbrant J, Strippoli GFM, Ferraresi M, Pereno A, Castelluccia N, Clari R, Moro I, Colombi N, Di Giorgio G, Barbero S, Piccoli GB, Krishnan M, Bond TC, Brunelli S, Nissenson A, Kara B, Palmer S, Wong G, Craig JC, Strippoli GFM, Hanafusa N, Wakai K, Iseki K, Tsubakihara Y, Ogata S, Bikbov B, Tomilina N, Suleymanlar G, Altiparmak MR, Seyahi N, Trabulus S, Serdengecti K, Huang ST, Shu KH, Kao CH, Palmer S, Ruospo M, Natale P, Johnson DW, Craig JC, Gargano L, Saglimbene V, Pellegrini F, Strippoli GFM, Bernasconi AR, Waisman R, Lapidus A, Montoya P, Heguilen R, Suzuki A, Shoji T, Tsubakihara Y, Hayashi T, Tomida K, Guinsburg A, Thijssen S, Usvyat L, Xiao Q, van der Sande F, Marelli C, Etter M, Marcelli D, Levin N, Wang Y, Kotanko P, Kooman J, Schiller A, Schiller O, Andrei C, Mihaescu A, Olariu N, Anton C, Ivacson Z, Roman V, Berca S, Bansal V, Hwang SJ, Lee JJ, Lin MY, Chang JS, Okamura K, Kishi T, Miyazono M, Ikeda Y, Fukumitsu T, Sanai T, Reyes-Bahamonde J, Raimann J, Usvyat LA, Thijssen S, Van der Sande F, Kooman J, Levin N, Kotanko P, Allehbi AM, Bunani AD, Noor A, Laplante S, Rutherford P, Kulcsar I, Szegedi J, Ladanyi E, Torok M, Reusz G, Kiss I, Sparacino V, Agnello V, Di Gaetano P, Guaiana V, Almasio P, Rainone F, Merlino L, Ritchie JP, Marcatti M, Kalra PA, Toprak O, Quintaliani G, Ranocchia D, Germini F, Notargiacomo A, Ariete ML, Palmer S, Ruospo M, Pellegrini F, Strippoli GFM, Bunani AD, Bunani ED, Herrero Berron JC, Mon C, Ortiz M, Hinostroza J, Cobo G, Gallar P, Ortega O, Rodriguez Villarreal I, Oliet A, Digiogia C, Vigil A, Trigka K, Douzdampanis P, Aggelakou-Vaitsi M, Vaitsis N, Fourtounas K, Vigotti FN, Apostu AL, Boscolo M, Chegui LK, Ferrero S, Gallicchio M, Garassino G, Ionescu A, Portonero I, Tarea CA, Valentino E, Piccoli GB, Sikole A, Trajceska L, Gelev S, Dzekova P, Selim G, Amitov V, Borg Cauchi A, Buhagiar L, Calleja N, Demarco D, Nikitidou O, Liakopoulos V, Michalaki A, Demirtzi P, Christidou F, Papagianni A, Daskalopoulou E, Nikolaidis P, Dombros N, Vassallo DM, Chinnadurai R, Robinson H, Middleton R, Donne R, Saralegui I, Garcia O, Robledo C, Gabilondo E, Ortalda VVO, Tomei PPT, Yabarek TTY, Spatola LLS, Dalla Gassa AADG, Lupo AAL, Barril G, Quiroga JA, Arenas D, Cigarran S, Garcia N, Glez Parra E, Martin A, Bartolome J, Castillo I, Carreno V, Baamonde E, Bosch E, Perez G, Ramirez I, Checa MD, Palmer S, Ruospo M, Pellegrini F, Strippoli GFM, Shifris I, Dudar I, Rudenko A, Gonchar I, Mademtzoglou S, Tsikliras NC, Balaskas EV, Montalto G, Lupica R, Fazio MR, Aloisi C, Donato V, Lucisano S, Buemi M, Trimboli D, Cernaro V, Donia A, Denewar A, Khil M, Dudar I, Khil V, Shifris I. Epidemiology CKD 5D - A. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Mehta P, Holder S, Fisher B, Vincent T, Nadesalingam K, Maciver H, Shingler W, Bakshi J, Hassan S, D'Cruz D, Chan A, Litwic AE, McCrae F, Seth R, McCrae F, Nandagudi A, Jury E, Isenberg D, Karjigi U, Paul A, Rees F, O'Dowd E, Kinnear W, Johnson S, Lanyon P, Bakshi J, Stevens R, Narayan N, Marguerie C, Robinson H, Ffolkes L, Worsnop F, Ostlere L, Kiely P, Dharmapalaiah C, Hassan N, Nandagudi A, Bharadwaj A, Skibinska M, Gendi N, Davies EJ, Akil M, Kilding R, Ramachandran Nair J, Walsh M, Farrar W, Thompson RN, Borukhson L, McFadyen C, Singh D, Rajagopal V, Chan AML, Wearn Koh L, Christie JD, Croot L, Gayed M, Disney B, Singhal S, Grindulis K, Reynolds TD, Conway K, Williams D, Quin J, Dean G, Churchill D, Walker-Bone KE, Goff I, Reynolds G, Grove M, Patel P, Lazarus MN, Roncaroli F, Gabriel C, Kinderlerer AR, Nikiphorou E, Hall FC, Bruce E, Gray L, Krutikov M, Wig S, Bruce I, D'Agostino MA, Wakefield R, Berner Hammer H, Vittecoq O, Galeazzi M, Balint P, Filippucci E, Moller I, Iagnocco A, Naredo E, Ostergaard M, Gaillez C, Kerselaers W, Van Holder K, Le Bars M, Stone MA, Williams F, Wolber L, Karppinen J, Maatta J, Thompson B, Atchia I, Lorenzi A, Raftery G, Platt P, Platt PN, Pratt A, Turmezei TD, Treece GM, Gee AH, Poole KE, Chandratre PN, Roddy E, Clarson L, Richardson J, Hider S, Mallen C, Lieberman A, Prouse PJ, Mahendran P, Samarawickrama A, Churchill D, Walker-Bone KE, Ottery FD, Yood R, Wolfson M, Ang A, Riches P, Thomson J, Nuki G, Humphreys J, Verstappen SM, Chipping J, Hyrich K, Marshall T, Symmons DP, Roy M, Kirwan JR, Marshall RW, Matcham F, Scott IC, Rayner L, Hotopf M, Kingsley GH, Scott DL, Steer S, Ma MH, Dahanayake C, Scott IC, Kingsley G, Cope A, Scott DL, Dahanayake C, Ma MH, Scott IC, Kingsley GH, Cope A, Scott DL, Wernham A, Ward L, Carruthers D, Deeming A, Buckley C, Raza K, De Pablo P, Nikiphorou E, Carpenter L, Jayakumar K, Solymossy C, Dixey J, Young A, Singh A, Penn H, Ellerby N, Mattey DL, Packham J, Dawes P, Hider SL, Ng N, Humby F, Bombardieri M, Kelly S, Di Cicco M, Dadoun S, Hands R, Rocher V, Kidd B, Pyne D, Pitzalis C, Poore S, Hutchinson D, Low A, Lunt M, Mercer L, Galloway J, Davies R, Watson K, Dixon W, Symmons D, Hyrich K, Mercer L, Lunt M, Low A, Galloway J, Watson KD, Dixon WG, Symmons D, Hyrich KL, Low A, Lunt M, Mercer L, Bruce E, Dixon W, Hyrich K, Symmons D, Malik SP, Kelly C, Hamilton J, Heycock C, Saravanan V, Rynne M, Harris HE, Tweedie F, Skaparis Y, White M, Scott N, Samson K, Mercieca C, Clarke S, Warner AJ, Humphreys J, Lunt M, Marshall T, Symmons D, Verstappen S, Chan E, Kelly C, Woodhead FA, Nisar M, Arthanari S, Dawson J, Sathi N, Ahmad Y, Koduri G, Young A, Kelly C, Chan E, Ahmad Y, Woodhead FA, Nisar M, Arthanari S, Dawson J, Sathi N, Koduri G, Young A, Cumming J, Stannett P, Hull R, Metsios G, Stavropoulos Kalinoglou A, Veldhuijzen van Zanten JJ, Nightingale P, Koutedakis Y, Kitas GD, Nikiphorou E, Dixey J, Williams P, Kiely P, Walsh D, Carpenter L, Young A, Perry E, Kelly C, de-Soyza A, Moullaali T, Eggleton P, Hutchinson D, Veldhuijzen van Zanten JJ, Metsios G, Stavropoulos-Kalinoglou A, Sandoo A, Kitas GD, de Pablo P, Maggs F, Carruthers D, Faizal A, Pugh M, Jobanputra P, Kehoe O, Cartwright A, Askari A, El Haj A, Middleton J, Aynsley S, Hardy J, Veale D, Fearon U, Wilson G, Muthana M, Fossati G, Healy L, Nesbitt A, Becerra E, Leandro MJ, De La Torre I, Cambridge G, Nelson PN, Roden D, Shaw M, Davari Ejtehadi H, Nevill A, Freimanis G, Hooley P, Bowman S, Alavi A, Axford J, Veitch AM, Tugnet N, Rylance PB, Hawtree S, Muthana M, Aynsley S, Mark Wilkinson J, Wilson AG, Woon Kam N, Filter A, Buckley C, Pitzalis C, Bombardieri M, Croft AP, Naylor A, Zimmermann B, Hardie D, Desanti G, Jaurez M, Muller-Ladner U, Filer A, Neumann E, Buckley C, Movahedi M, Lunt M, Ray DW, Dixon WG, Burmester GR, Matucci-Cerinic M, Navarro-Blasco F, Kary S, Unnebrink K, Kupper H, Mukherjee S, Cornell P, Richards S, Rahmeh F, Thompson PW, Westlake SL, Javaid MK, Batra R, Chana J, Round G, Judge A, Taylor P, Patel S, Cooper C, Ravindran V, Bingham CO, Weinblatt ME, Mendelsohn A, Kim L, Mack M, Lu J, Baker D, Westhovens R, Hewitt J, Han C, Keystone EC, Fleischmann R, Smolen J, Emery P, Genovese M, Doyle M, Hsia EC, Hart JC, Lazarus MN, Kinderlerer AR, Harland D, Gibbons C, Pang H, Huertas C, Diamantopoulos A, Dejonckheere F, Clowse M, Wolf D, Stach C, Kosutic G, Williams S, Terpstra I, Mahadevan U, Smolen J, Emery P, Ferraccioli G, Samborski W, Berenbaum F, Davies O, Koetse W, Bennett B, Burkhardt H, Weinblatt ME, Fleischmann R, Davies O, Luijtens K, van der Heijde D, Mariette X, van Vollenhoven RF, Bykerk V, de Longueville M, Arendt C, Luijtens K, Cush J, Khan A, Maclaren Z, Dubash S, Chalam VC, Sheeran T, Price T, Baskar S, Mulherin D, Molloy C, Keay F, Heritage C, Douglas B, Fleischmann R, Weinblatt ME, Schiff MH, Khanna D, Furst DE, Maldonado MA, Li W, Sasso EH, Emerling D, Cavet G, Ford K, Mackenzie-Green B, Collins D, Price E, Williamson L, Golla J, Vagadia V, Morrison E, Tierney A, Wilson H, Hunter J, Ma MH, Scott DL, Reddy V, Moore S, Ehrenstein M, Benson C, Wray M, Cairns A, Wright G, Pendleton A, McHenry M, Taggart A, Bell A, Bosworth A, Cox M, Johnston G, Shah P, O'Brien A, Jones P, Sargeant I, Bukhari M, Nusslein H, Alten R, Galeazzi M, Lorenz HM, Boumpas D, Nurmohamed MT, Bensen W, Burmester GR, Peter HH, Rainer F, Pavelka K, Chartier M, Poncet C, Rauch C, Le Bars M, Lempp H, Hofmann D, Adu A, Congreve C, Dobson J, Rose D, Simpson C, Wykes T, Cope A, Scott DL, Ibrahim F, Schiff M, Alten R, Weinblatt ME, Nash P, Fleischmann R, Durez P, Kaine J, Delaet I, Kelly S, Maldonado M, Patel S, Genovese M, Jones G, Sebba A, Lepley D, Devenport J, Bernasconi C, Smart D, Mpofu C, Gomez-Reino JJ, Verma I, Kaur J, Syngle A, Krishan P, Vohra K, Kaur L, Garg N, Chhabara M, Gibson K, Woodburn J, Telfer S, Buckley F, Finckh A, Huizinga TW, Dejonckheere F, Jansen JP, Genovese M, Sebba A, Rubbert-Roth A, Scali JJ, Alten R, Kremer JM, Pitts L, Vernon E, van Vollenhoven RF, Sharif MI, Das S, Emery P, Maciver H, Shingler W, Helliwell P, Sokoll K, Vital EM. Case Reports * 1. A Late Presentation of Loeys-Dietz Syndrome: Beware of TGF Receptor Mutations in Benign Joint Hypermobility. Rheumatology (Oxford) 2013. [DOI: 10.1093/rheumatology/ket197] [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: 11/12/2022] Open
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Robinson H, McCloskey P, Nair U, Ashcroft L, Bayman N, Burt P, Chittalia A, Coote J, Harris M, Lee L, Pemberton L, Sheikh H, Faivre-Finn C. 173 Assessing CT changes post stereotactic ablative body radiotherapy (SABR) using the criteria proposed by Senan et al. Lung Cancer 2013. [DOI: 10.1016/s0169-5002(13)70173-9] [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: 10/26/2022]
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Robinson H, Kannanganat S, Gangadhara S, Lai L, Yu T, Kozlowski P, Earl P, Moss B, Amara RR. GM-CSF co-expressing DNA/MVA vaccine, prevention of acquisition by two series of SIVE660 challenges followed by a series of SIV251 challenges. Retrovirology 2012. [PMCID: PMC3441798 DOI: 10.1186/1742-4690-9-s2-p25] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
| | | | | | - L Lai
- Emory University, Atlanta, GA, USA
| | - T Yu
- Emory University, Atlanta, GA, USA
| | - P Kozlowski
- Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - P Earl
- National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - B Moss
- National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - RR Amara
- Emory University, Atlanta, GA, USA
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Goepfert P, Elizaga M, Montefiori D, Hural J, DeRosa S, Tomaras G, Seaton K, Sato A, Ouedraogo L, Donastorg Y, Cardinali M, Lama J, Baden L, Keefer M, McElrath J, Kalams S, Robinson H. Phase 2a safety and immunogenicity testing of DNA and recombinant modified vaccinia ankara virus vaccines expressing virus-like particles. Retrovirology 2012. [PMCID: PMC3441271 DOI: 10.1186/1742-4690-9-s2-o56] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- P Goepfert
- University of Alabama at Birmignham, Birmingham, AL, USA
| | - M Elizaga
- Fred Hutchinson Cancer Research Institute, Seattle, WA, USA
| | | | - J Hural
- Fred Hutchinson Cancer Research Institute, Seattle, WA, USA
| | - S DeRosa
- Fred Hutchinson Cancer Research Institute, Seattle, WA, USA
| | | | - K Seaton
- Duke University, Durham, NC, USA
| | - A Sato
- Fred Hutchinson Cancer Research Institute, Seattle, WA, USA
| | - L Ouedraogo
- NIAID Vaccine Clinical Research Branch, Bethesda, MD, USA
| | - Y Donastorg
- Unidad de Vacunas IDCP-COIN-DIGECITSS, Santo Dominago, Dominican Republic
| | - M Cardinali
- NIAID Vaccine Clinical Research Branch, Bethesda, MD, USA
| | - J Lama
- Asociacion Civil IMPACTA Salud y Educacion, Barranco, Lima, Peru
| | - L Baden
- Brigham and Women's Hospital, Boston, MA, USA
| | - M Keefer
- University of Rochester, Rochester, NY, USA
| | - J McElrath
- Fred Hutchinson Cancer Research Instituted, Seattle, WA, USA
| | - S Kalams
- Vanderbilt University, Nashville, TN, USA
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Chung A, Dugast A, Robinson H, Chan Y, Ackerman ME, Cox J, Koff W, Barouch D, Rerks-Ngarm S, Michael N, Kim J, Alter G. Vector induced skewing of antibody Fc-effector functions. Retrovirology 2012. [PMCID: PMC3442037 DOI: 10.1186/1742-4690-9-s2-p361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Aldrich MB, Davies-Venn C, Angermiller B, Robinson H, Chan W, Kwon S, Sevick-Muraca EM. Concentration of indocyanine green does not significantly influence lymphatic function as assessed by near-infrared imaging. Lymphat Res Biol 2012; 10:20-4. [PMID: 22416911 DOI: 10.1089/lrb.2011.0003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Absorbance of near-infrared (600-800 nm) light by the tissue components water, melanin, and hemoglobin is minimal. This property allows the use of near-infrared-emitting fluorophores for noninvasive, in vivo, real-time imaging of tissue, without the interference of autofluorescence experienced with imaging in other wavelength ranges. Near-infrared (NIR) fluorescence imaging has been used to noninvasively image lymphatic architecture and pumping function in animals, as well as in humans. The effects of different doses of a NIR dye, indocyanine green (ICG), on lymphatic function have been questioned. This study aims to address these concerns in the context of a mouse inguinal-to-axillary lymphatic imaging model. METHODS AND RESULTS We measured lymph propulsive velocity and frequency using an imaging system composed of a laser diode for excitation of the dye, an image intensifier, and an intensified charge-coupled device (ICCD) camera to capture real-time images. At 0.32, 0.645, and 1.3 mM ICG, no significant differences in lymphatic propulsive velocity or frequency were observed. Additionally, the use of other NIR imaging agents did not result in significant differences. CONCLUSIONS The use of different concentrations of ICG and the use of other near-infrared fluorophores for optical imaging of lymphatics does not significantly affect lymphatic propulsive velocity or frequency.
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Affiliation(s)
- M B Aldrich
- Center for Molecular Imaging, The Brown Foundation Institute for Molecular Medicine, University of Texas Health Science Center, Houston, TX 77030, USA.
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Robinson H, Shrimali R, Webster G, Koh P, Helbrow J, Bayman N, Burt P, Chittalia A, Harris M, Lander H, Coote J, Lee L, Pemberton L, Sheikh H, Ashcroft L, Faivre-Finn C. 146 One year on: early report of intensity modulated radiotherapy (IMRT) for locally advanced lung cancer at the Christie. Lung Cancer 2012. [DOI: 10.1016/s0169-5002(12)70147-2] [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: 11/16/2022]
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Heatley S, Sigsworth E, Braybrook J, Robinson H. Improving renal and palliative care services for patients - a staff exchange programme. BMJ Support Palliat Care 2011. [DOI: 10.1136/bmjspcare-2011-000105.14] [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: 11/03/2022]
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Schneider DK, Sweet RM, Sullivan M, Stoner-Ma D, Stojanoff V, Soares A, Shi W, Robinson H, Orville A, Liu Q, Lidestri J, Jakoncic J, Héroux A, Hendrickson WA, Chance M, Allaire M, Berman LE. Towards macromolecular crystallography beamlines at NSLS-II. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311093536] [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: 11/10/2022] Open
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Berman LE, Allaire M, Chance M, Hendrickson W, Héroux A, Jakoncic J, Liu Q, Orville A, Robinson H, Schneider D, Shi W, Soares A, Stojanoff V, Stoner-Ma D, Sullivan M, Sweet R. Pair of canted undulator MX beamlines proposed for NSLS-II. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311093615] [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: 11/10/2022] Open
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Wright E, Robinson H, Rossiter J. P1-62 The virtual committee: a practical process for maintaining high quality content of online learning resources for public health practice in Canada. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976c.55] [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: 11/03/2022]
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Duemling WW, Duncan GG, Feldman WH, Foster JW, Hervey A, Hinshaw HC, Johnson MJ, Kavanagh F, Kleinman A, Molitor H, Pulaski E, Rake G, Raper KB, Reynolds DM, Richardson AP, Robbins WJ, Robinson H, Schatz A, Waksman SA, Woodruff HB. VOLUME XLVIII, ART. 2. PAGES 31-218
SEPTEMBER 27, 1946
ANTIBIOTICS*. Ann N Y Acad Sci 2010. [DOI: 10.1111/j.1749-6632.2010.05862.x] [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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Kannanganat S, Nigam P, Velu V, Earl P, Lai L, Lawson B, Chennareddi L, Wilson R, Kozlowski P, Moss B, Robinson H, Amara R. OA07-03. Influence of preexisting vaccinia immunity on a DNA/MVA SIV vaccine, decreased cellular immunity but enhanced control of a pathogenic SIV challenge. Retrovirology 2009. [PMCID: PMC2767575 DOI: 10.1186/1742-4690-6-s3-o51] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Affiliation(s)
| | - H. Robinson
- a Physical Laboratory , University of Manchester
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Berman L, Allaire M, Chance M, Hendrickson W, Heroux A, Manjasetty B, Orville A, Robinson H, Saxena A, Schneider D, Shi W, Soares A, Stojanoff V, Sweet R. A proposed suite of macromolecular crystallography facilities for NSLS-II. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308094427] [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: 11/11/2022] Open
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Zhou Y, Millward-Sadler SJ, Lin H, Robinson H, Goldring M, Salter DM, Nuki G. Evidence for JNK-dependent up-regulation of proteoglycan synthesis and for activation of JNK1 following cyclical mechanical stimulation in a human chondrocyte culture model. Osteoarthritis Cartilage 2007; 15:884-93. [PMID: 17408985 DOI: 10.1016/j.joca.2007.02.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2005] [Accepted: 02/04/2007] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To examine the expression of mitogen-activated protein kinases (MAPKs) in human chondrocytes, to investigate whether selective activation of MAPKs is involved in up-regulation of proteoglycan (PG) synthesis following cyclical mechanical stimulation (MS), and to examine whether MS is associated with integrin-dependent or independent activation of MAPKs. METHODS The C-28/I2 and C-20/A4 human chondrocyte cell lines were mechanically stimulated in monolayer cell culture. PG synthesis was assessed by [(35)S]-sulphate incorporation in the presence and absence of the p38 inhibitor SB203580, and the extracellular-regulated kinase (ERK1/2) inhibitor PD98059. Kinase expression and activation were assessed by Western blotting using phosphorylation status-dependent and independent antibodies, and by kinase assays. The Jun N-terminal kinase (JNK) inhibitor SP600125 and the anti-beta(1) integrin (CD29) function-blocking antibody were used to assess JNK activation and integrin dependence, respectively. RESULTS Increased PG synthesis following 3 h of cyclic MS was abolished by pretreatment with 10 microM SB203580, but was not affected by 50 microM PD98059. The kinases p38, ERK1/ERK2 and JNKs were expressed in both stimulated and unstimulated cells. Phosphorylated p38 was detected at various time points following 0.5, 1, 2 and 3 h MS in C-28/I2, but not detected in C-20/A4 cell lines. Phosphorylation of ERK1 and ERK2 was not significantly affected by MS. Phosphorylation of the 54 and 46 kDa JNKs increased following 0.5, 1, 2 and 3 h of MS, and following CO(2) deprivation. MS-induced JNK phosphorylation was inhibited by SB203580 at concentrations > or =5 microM and activation of JNK1 following MS was blocked by SP600125 and partially inhibited by anti-CD29. CONCLUSIONS The data suggest JNK, rather than p38 or ERK dependent increases in PG synthesis, and selective, partially integrin-dependent, activation of JNK kinases in human chondrocyte cell lines following cyclical MS. JNK activation is also very sensitive to changes in CO(2)/pH in this chondrocyte culture model.
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Affiliation(s)
- Y Zhou
- University of Edinburgh, Osteoarticular Research Group, Queen's Medical Research Institute, Edinburgh, Scotland, UK
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Gibson J, Ellory C, Browning J, Robinson H. Oxygen dependence of membrane transport in normal and sickle human red blood cells. Comp Biochem Physiol A Mol Integr Physiol 2007. [DOI: 10.1016/j.cbpa.2007.01.332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mans J, Tiemessen CT, Robinson H, Balbo A, Schuck P, Natarajan K, Margulies DH. X-ray Crystallographic Structures of Murine Cytomegalovirus MHC-I-like Molecules Reveal Distinct Modes of Exploitation of the MHC-I Fold (93.18). The Journal of Immunology 2007. [DOI: 10.4049/jimmunol.178.supp.93.18] [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] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
The mouse cytomegalovirus (mCMV), a β-herpesvirus that encodes more than 170 open reading frames (ORFs), serves as a model for infection by the human CMV. Protein homology suggests that at least 10 of the mCMV ORFs might be related in structure to MHC-I molecules. Several of these putative viral MHC-I like molecules (MHC-Iv) have been shown to function as immunoevasins. To establish a structural basis for the function and evolution of MHC-Iv molecules, we have initiated a structural survey, and report here the X-ray crystallographic structures of two mCMV molecules, m144 and m153. m144 crystallized in complex with the light chain, β2-microglobulin (β-2m), and its structure was determined to 1.9 Å resolution by molecular replacement. m153 formed fragile crystals that diffracted to 2.4 Å and its structure was solved by the single anomalous dispersion method. Both molecules reveal readily identifiable α1 and α2 helices and Ig-like α3 domains. Neither molecule has any bound peptide or other small molecule ligand. m144 interacts with β2-m, while m153 lacks a light chain. m153, which purifies as a non-covalently associated dimer, reveals an extended amino terminus stabilized by a unique disulfide bond, and has a lengthy α2 helix that extends into the α3 domain. The m153 dimer is confirmed by sedimentation analysis. Comparison of m144 and m153 structures reveals conservation in the α3 domain, and shows unique features in both α1 and α2. These structures offer insight into the evolution of MHC-Iv molecules and illustrate the versatility of the MHC-I fold.
This research was supported in part by the Intramural Research Program of the NIH, NIAID.
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Affiliation(s)
- Janet Mans
- 1University of the Witwatersrand, 2131 Sandringham, Johannesburg, South Africa,
- 2LI/NIAID,
| | - C. T. Tiemessen
- 1University of the Witwatersrand, 2131 Sandringham, Johannesburg, South Africa,
| | | | - A. Balbo
- 3OD, NIH, 10 Center Dr., Bethesda, MD, 20892,
| | - P. Schuck
- 3OD, NIH, 10 Center Dr., Bethesda, MD, 20892,
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Gallagher DT, Monbouquette HG, Schröder I, Robinson H, Holden MJ, Smith NN. Structure of alanine dehydrogenase from Archaeoglobus: active site analysis and relation to bacterial cyclodeaminases and mammalian mu crystallin. J Mol Biol 2004; 342:119-30. [PMID: 15313611 DOI: 10.1016/j.jmb.2004.06.090] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2004] [Revised: 06/29/2004] [Accepted: 06/30/2004] [Indexed: 10/26/2022]
Abstract
The hyperthermophilic archaeon Archaeoglobus fulgidus contains an L-Ala dehydrogenase (AlaDH, EC 1.4.1.1) that is not homologous to known bacterial dehydrogenases and appears to represent a previously unrecognized archaeal group of NAD-dependent dehydrogenases. The gene (Genbank; TIGR AF1665) was annotated initially as an ornithine cyclodeaminase (OCD) on the basis of strong homology with the mu crystallin/OCD protein family. We report the structure of the NAD-bound AF1665 AlaDH (AF-AlaDH) at 2.3 A in a C2 crystal form with the 70 kDa dimer in the asymmetric unit, as the first structural representative of this family. Consistent with its lack of homology to bacterial AlaDH proteins, which are mostly hexameric, the archaeal dimer has a novel structure. Although both types of AlaDH enzyme include a Rossmann-type NAD-binding domain, the arrangement of strands in the C-terminal half of this domain is novel, and the other (catalytic) domain in the archaeal protein has a new fold. The active site presents a cluster of conserved Arg and Lys side-chains over the pro-R face of the cofactor. In addition, the best ordered of the 338 water molecules in the structure is positioned well for mechanistic interaction. The overall structure and active site are compared with other dehydrogenases, including the AlaDH from Phormidium lapideum. Implications for the catalytic mechanism and for the structures of homologs are considered. The archaeal AlaDH represents an ancient and previously undescribed subclass of Rossmann-fold proteins that includes bacterial ornithine and lysine cyclodeaminases, marsupial lens proteins and, in man, a thyroid hormone-binding protein that exhibits 30% sequence identity with AF1665.
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Affiliation(s)
- D T Gallagher
- Biotechnology Division of the National Institute of Standards and Technology, Gaithersburg, MD 20899-8312, USA.
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Boltryk P, Hill M, Keary A, Phillips B, Robinson H, White P. An ultrasonic transducer array for velocity measurement in underwater vehicles. Ultrasonics 2004; 42:473-478. [PMID: 15047331 DOI: 10.1016/j.ultras.2003.12.036] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A correlation velocity log (CVL) is an ultrasonic navigation aid for marine applications, in which velocity is estimated using an acoustic transmitter and a receiver array. CVLs offer advantages over Doppler velocity logs (DVLs) in many autonomous underwater vehicle (AUV) applications, since they can achieve high accuracy at low velocities even during hover manoeuvres. DVLs require narrow beam widths, whilst ideal CVL transmitters have wide beam widths. This gives CVLs the potential to use lower frequencies thus permitting operation in deeper water, reducing power requirements for the same depth, or allowing the use of smaller transducers. Moving patterns in the wavefronts across a 2D receiver array are detected by calculating correlation coefficients between bottom reflections from consecutive transmitted pulses, across all combinations of receiver pairings. The position of the peak correlation value, on a surface representing receiver-pairing separations, is proportional to the vessel's displacement between pulses. A CVL aimed primarily for AUVs has been developed. Its acoustical and signal processing design has been optimised through sea trials and computer modelling of the sound field. This computer model is also used to predict how the distribution of the correlation coefficients varies with distance from the peak position. Current work seeks to increase the resolution of the peak estimate using surface fitting methods. Numerical simulations suggest that peak estimation methods significantly improve system precision when compared with simply identifying the position of the maximum correlation coefficient in the dataset. The peak position may be estimated by fitting a quadratic model to the measured data using least squares or maximum likelihood estimation. Alternatively, radial basis functions and Gaussian processes successfully predict the peak position despite variation between individual correlation datasets. This paper summarises the CVL's main acoustical features and signal processing techniques and includes results of sea trials using the device.
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Affiliation(s)
- P Boltryk
- School of Engineering Sciences, Electromechanical Research Group, University of Southampton, Southampton SO17 1BJ, UK
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Robinson H, Schulz J, Flood C, Hansen L. A randomized controlled trial of the NEAT expandable tip continence device. Int Urogynecol J 2003; 14:199-203; discussion 203. [PMID: 12955343 DOI: 10.1007/s00192-002-1021-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2002] [Accepted: 10/04/2002] [Indexed: 10/26/2022]
Abstract
Urethral devices are one conservative management option for stress and mixed urinary incontinence, but there is little published data about their use. The aims of this study were to assess the safety and efficacy of a new urethral device (NEAT) and compare it with the Reliance Insert. The ease of use of both devices was then evaluated. Twenty-four women with mixed or stress urinary incontinence, patients at our tertiary care urogynecology unit and who met the inclusion and exclusion criteria, were enrolled in the study. Study subjects were blinded and randomly assigned to a device group. Device efficacy was assessed by pad weighing at 0 and 4 months. Success was defined as a 50% or greater reduction in urine loss using the formula 100[(pad weight without device -pad weight with device)/pad weight with device]. Safety was evaluated using urinalysis and urine cultures. Ease of use assessment scales were also completed. Eleven patients were randomized to the Reliance Insert and 13 to the NEAT device. There were no significant differences between the two groups in age, height, weight, duration of incontinence, pad weight, leakage score, parity or quality of life score. Based on the pad weight success formula, there was no significant difference in device success between the two groups at 4 months. Women who were postmenopausal had a trend towards a higher level of success in reduction of their pad weight. Previous treatment, diagnosis and hormone replacement therapy all had no relationship to device success. Leakage score data showed that subjects had a significant decrease in urine leakage when using either device. There was no statistically significant difference in ease of use between the two devices. Adverse symptoms most commonly noted were awareness of the device (62.5%), urgency (29.2%), and urethral discomfort or pain (20.8%). One urinary tract infection (UTI) was observed. The most common finding on urinalysis was trace hematuria (15.8%). Our conclusions are that the NEAT device appears to be at least as effective and safe as the Reliance Insert. Both devices are effective at decreasing urine leakage in patients with stress or mixed urinary incontinence. The risk of UTI is low, but these devices may cause trace hematuria.
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Affiliation(s)
- H Robinson
- Department of Obstetrics and Gynecology, University of Alberta, Royal Alexandra Hospital, Edmonton, AB, Canada.
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Harewood L, Robinson H, Harris R, Al-Obaidi MJ, Jalali GR, Martineau M, Moorman AV, Sumption N, Richards S, Mitchell C, Harrison CJ. Amplification of AML1 on a duplicated chromosome 21 in acute lymphoblastic leukemia: a study of 20 cases. Leukemia 2003; 17:547-53. [PMID: 12646943 DOI: 10.1038/sj.leu.2402849] [Citation(s) in RCA: 132] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This study identifies multiple copies of the AML1 gene on a duplicated chromosome 21, dup(21), as a recurrent abnormality in acute lymphoblastic leukemia (ALL). Clusters of AML1 signals were visible at interphase by fluorescence in situ hybridization (FISH). In metaphase, they appeared tandemly duplicated on marker chromosomes of five distinct morphological types: large or small acrocentrics, metacentrics, submetacentrics or rings. The markers comprised only chromosome 21 material. Karyotypes were near-diploid and, besides dup(21), no other established chromosomal changes were observed. A total of 20 patients, 1.5 and <0.5% among consecutive series of childhood and adult ALL respectively, showed this phenomenon. Their median age was 9 years, white cell counts were low and all had a pre-B/common immunophenotype. Although this series is not the first report of this abnormality, it is the largest, permitting a detailed description of the variety of morphological forms that duplicated chromosome 21 can assume.
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Affiliation(s)
- L Harewood
- Leukaemia Research Fund Cytogenetics Group, Cancer Sciences Division, University of Southampton, UK
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Abstract
OBJECTIVE To explore the relationship between maternal obesity and shoulder dystocia while controlling for the potential confounding effects of other variables associated with obesity. METHODS We performed a case-control study of provincial delivery records audited by the Northern and Central Alberta Perinatal Outreach Program. Risk factors evaluated were selected based on previously published studies. Cases and controls were drawn from 45,877 live singleton cephalic vaginal deliveries weighing more than 2500 g between January 1995 and December 1997. There were 413 cases of shoulder dystocia (0.9% incidence). Controls (n = 845) were randomly chosen from the remainder of the target population to create a 1:2 case/control ratio. Univariate analysis with calculation of odds ratios (ORs) was used to determine which of the chosen risk factors were significantly related to the incidence of shoulder dystocia. Multivariable regression analyses were then used to determine the independently associated variables, and the adjusted ORs were obtained for each relevant risk factor. RESULTS Maternal obesity was not significant as an independent risk factor for shoulder dystocia after adjusting for confounding variables (adjusted OR 0.9; 95% confidence interval [CI] 0.5, 1.6). Fetal macrosomia was the single most powerful predictor. The adjusted ORs were 39.5 (95% CI 19.1, 81.4) for birth weight greater than 4500 g and 9.0 (95% CI 6.5, 12.6) for birth weight between 4000 and 4499 g. CONCLUSION The strongest predictors of shoulder dystocia are related to fetal macrosomia. For obese nondiabetic women carrying fetuses whose weights are estimated to be within normal limits, there is no increased risk of shoulder dystocia.
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Affiliation(s)
- H Robinson
- Department of Obstetrics and Gynecology, Perinatal Research Centre, University of Alberta, Edmonton, Alberta, Canada
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Heroux A, Robinson H, Skinner J, Cowan M, Bosshard H, Nolan B, Sweet R. Software to manage the synchrotron experience: experimental control and a database. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302087834] [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: 11/10/2022] Open
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Ko TP, Chen YK, Robinson H, Tsai PC, Gao YG, Chen AP, Wang AH, Liang PH. Mechanism of product chain length determination and the role of a flexible loop in Escherichia coli undecaprenyl-pyrophosphate synthase catalysis. J Biol Chem 2001; 276:47474-82. [PMID: 11581264 DOI: 10.1074/jbc.m106747200] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Escherichia coli undecaprayl-pyrophosphate synthase (UPPs) structure has been solved using the single wavelength anomalous diffraction method. The putative substrate-binding site is located near the end of the betaA-strand with Asp-26 playing a critical catalytic role. In both subunits, an elongated hydrophobic tunnel is found, surrounded by four beta-strands (betaA-betaB-betaD-betaC) and two helices (alpha2 and alpha3) and lined at the bottom with large residues Ile-62, Leu-137, Val-105, and His-103. The product distributions formed by the use of the I62A, V105A, and H103A mutants are similar to those observed for wild-type UPPs. Catalysis by the L137A UPPs, on the other hand, results in predominantly the formation of the C(70) polymer rather than the C(55) polymer. Ala-69 and Ala-143 are located near the top of the tunnel. In contrast to the A143V reaction, the C(30) intermediate is formed to a greater extent and is longer lived in the process catalyzed by the A69L mutant. These findings suggest that the small side chain of Ala-69 is required for rapid elongation to the C(55) product, whereas the large hydrophobic side chain of Leu-137 is required to limit the elongation to the C(55) product. The roles of residues located on a flexible loop were investigated. The S71A, N74A, or R77A mutants displayed 25-200-fold decrease in k(cat) values. W75A showed an 8-fold increase of the FPP K(m) value, and 22-33-fold increases in the IPP K(m) values were observed for E81A and S71A. The loop may function to bridge the interaction of IPP with FPP, needed to initiate the condensation reaction and serve as a hinge to control the substrate binding and product release.
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Affiliation(s)
- T P Ko
- Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan
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Thakkar H, Chen X, Tyan F, Gim S, Robinson H, Lee C, Pandey SK, Nwokorie C, Onwudiwe N, Srivastava RK. Pro-survival function of Akt/protein kinase B in prostate cancer cells. Relationship with TRAIL resistance. J Biol Chem 2001; 276:38361-9. [PMID: 11461904 DOI: 10.1074/jbc.m103321200] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Tumor necrosis factor superfamily member TRAIL/Apo-2L has recently been shown to induce apoptosis in transformed and cancer cells. Some prostate cancer cells express constitutively active Akt/protein kinase B due to a complete loss of lipid phosphatase PTEN gene, a negative regulator of phosphatidylinositol 3-kinase pathway. Constitutively active Akt promotes cellular survival and resistance to chemotherapy and radiation. We have recently noticed that some human prostate cancer cells are resistant to TRAIL. We therefore examined the intracellular mechanisms of cellular resistance to TRAIL. The cell lines expressing the highest level of constitutively active Akt were more resistant to undergo apoptosis by TRAIL than those expressing the lowest level. Down-regulation of constitutively active Akt by phosphatidylinositol 3-kinase inhibitors, wortmannin and LY294002, reversed cellular resistance to TRAIL. Treatment of resistant cells with cycloheximide (a protein synthesis inhibitor) rendered cells sensitive to TRAIL. Transfecting dominant negative Akt decreased Akt activity and increased TRAIL-induced apoptosis in cells with high Akt activity. Conversely, transfecting constitutively active Akt into cells with low Akt activity increased Akt activity and attenuated TRAIL-induced apoptosis. Inhibition of TRAIL sensitivity occurs at the level of BID cleavage, as caspase-8 activity was not affected. Enforced expression of anti-apoptotic protein Bcl-2 or Bcl-X(L) inhibited TRAIL-induced mitochondrial dysfunction and apoptosis. We therefore identify Akt as a constitutively active kinase that promotes survival of prostate cancer cells and demonstrate that modulation of Akt activity, by pharmacological or genetic approaches, alters the cellular responsiveness to TRAIL. Thus, TRAIL in combination with agents that down-regulate Akt activity can be used to treat prostate cancer.
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Affiliation(s)
- H Thakkar
- Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Greenebaum Cancer Center, Baltimore, Maryland 21201-1180, USA
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Chen X, Thakkar H, Tyan F, Gim S, Robinson H, Lee C, Pandey SK, Nwokorie C, Onwudiwe N, Srivastava RK. Constitutively active Akt is an important regulator of TRAIL sensitivity in prostate cancer. Oncogene 2001; 20:6073-83. [PMID: 11593415 DOI: 10.1038/sj.onc.1204736] [Citation(s) in RCA: 222] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2001] [Revised: 06/07/2001] [Accepted: 06/14/2001] [Indexed: 11/09/2022]
Abstract
TRAIL/Apo-2L is a member of the tumor necrosis factor superfamily and has recently been shown to induce apoptosis in cancer cells, but not in normal cells. In nude mice injected with human tumors, TRAIL reduces the size of these tumors without side effects. Akt promotes cell survival and block apoptosis. Some prostate cancer cells express high levels of Akt due to lack of active lipid phosphatase PTEN, a negative regulator of PI-3 kinase pathway, which may be responsible for drug resistance. The objective of this paper is to investigate the intracellular molecules that regulate TRAIL resistance. We have examined caspase-8 activity, BID cleavage, Akt activity, mitochondrial membrane potential (DeltaPsi(m)) and apoptosis in prostate cancer (LNCap, PC-3, PC-3M and DU145) cells treated with or without TRAIL. PC-3, PC-3M and DU145 cells are sensitive to TRAIL, whereas LNCap cells are resistant. LNCap cells express the highest level of constitutively active Akt, which is directly correlated with TRAIL resistance. TRAIL activates caspase-8 in all the cell lines. Downregulation of constitutively active Akt by PI-3 kinase inhibitors (wortmannin and LY-294002), dominant negative Akt or PTEN, renders LNCap cells sensitive to TRAIL. Inhibition of TRAIL sensitivity occurs at the level of BID cleavage. Inhibition of protein synthesis by cycloheximide also causes LNCap cells sensitive to TRAIL. Overexpression of Bcl-2 or Bcl-X(L) inhibits TRAIL-induced DeltaPsi(m) and apoptosis. Overexpression of constitutively active Akt in PC-3M cells (express very low levels of constitutively active Akt) restores TRAIL resistance. These data suggest that elevated Akt activity protects LNCap cells from TRAIL-induced apoptosis, and the PI-3 kinase/Akt pathway may inhibit apoptotic signals by inhibiting processing of BID. Thus, constitutively active Akt is an important regulator of TRAIL sensitivity in prostate cancer.
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Affiliation(s)
- X Chen
- Department of Pharmaceutical Sciences, University of Maryland-School of Pharmacy, Greenebaum Cancer Center, 20 N Pine Street, Baltimore, MD 21201-1180, USA
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Abstract
This overview serves as an introduction to the systemic vasculitides, which are a group of heterogeneous disorders sharing a common pathophysiological mechanism leading to blood vessel inflammation and tissue necrosis. Our lack of understanding of the aetiology for most forms of vasculitis has resulted in the development of a classification system, which is primarily based on vessel size. Such a system assists in the grouping together of similar conditions for the purposes of multi-centre studies. Difficulties arise in classification of the vasculitides due to considerable overlap of clinico-pathological features; for example, microscopic polyangiitis (MPA), Wegener's granulomatosis (WG) and Churg-Strauss syndrome (CSS) may all cause the identical renal lesion of necrotizing glomerulonephritis. The rationale for treatment often depends on the type of vasculitis and on the extent of organ involvement. Treatment may be similar for different types of disease. The lack of validated diagnostic criteria has, however, resulted in the application of classification criteria in their place, and has highlighted the limited usefulness of classification criteria in clinical practice. Classification systems should assist in the determination of therapy and prediction of outcomes, but have many limitations, which are discussed further in this review.
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Affiliation(s)
- R A Luqmani
- Rheumatology Department, Western General Hospital, Crewe Road, Edinburgh, EH4 2XU, UK
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