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Otten AT, Peters V, Barth I, Stevens CL, Bourgonje AR, Frijlink HW, Harmsen HJM, Rehman A, Campmans-Kuijpers MJE, Dijkstra G. Effects of ileocolonic delivered vitamin B 2, B 3 and C (ColoVit) or the Groningen anti-inflammatory diet on disease course and microbiome of patients with Crohn's disease (VITA-GrAID study): a protocol for a randomised and partially blinded trial. BMJ Open 2023; 13:e069654. [PMID: 36918234 PMCID: PMC10016306 DOI: 10.1136/bmjopen-2022-069654] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
BACKGROUND Diet plays a pivotal role in the onset and progression of Crohn's disease (CD). Nutritional interventions revealed effects on intestinal inflammation and gut microbial composition. However, data from well-designed and controlled dietary trials are lacking. Therefore, evidence-based dietary recommendations are still unavailable to patients and physicians. Here, we aim to investigate the effects of an evidence-based anti-inflammatory diet, and an ileocolonic-targeted capsule containing vitamin B2, B3 and C (ColoVit) on patients with CD and their healthy household members. METHODS AND ANALYSIS In this multicentre, randomised, placebo-controlled, partially blinded nutritional intervention trial, we aim to recruit 255 CD patients with Harvey-Bradshaw Index <8 and a faecal calprotectin (FCal) cut-off of ≥100 µg/g at baseline. Participants will be randomised into two experimental intervention groups and one placebo group. In the experimental groups, participants will either adhere to the Groningen anti-inflammatory diet (GrAID) or ingest an ileocolonic-delivered oral vitamin B2/B3/C capsule (ColoVit). The study consists of a 12-week controlled interventional phase, which proceeds to a 9-month observational follow-up phase in which patients allocated to the GrAID group will be requested to continue the intervention on their own accord. Household members of participating patients will be asked to participate in the trial as healthy subjects and are allocated to the same group as their peer. The primary study outcome for patients is the change in FCal level from baseline. The primary outcome for household members is the change in gut microbial composition, which is set as secondary outcome for patients. ETHICS AND DISSEMINATION The protocol has been approved by the Institutional Review Board of the Stichting Beoordeling Ethiek Biomedisch Onderzoek in Assen, the Netherlands. Written informed consent will be obtained from all participants. Results will be disseminated through peer-reviewed journals and conference presentations. TRIAL REGISTRATION NUMBER NCT04913467.
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Affiliation(s)
- Antonius Timotheus Otten
- Department of Gastroenterology and Hepatology, University Medical Centre Groningen, Groningen, The Netherlands
| | - V Peters
- Department of Gastroenterology and Hepatology, University Medical Centre Groningen, Groningen, The Netherlands
| | - I Barth
- Department of Gastroenterology and Hepatology, University Medical Centre Groningen, Groningen, The Netherlands
| | - C L Stevens
- Department of Gastroenterology and Hepatology, University Medical Centre Groningen, Groningen, The Netherlands
| | - A R Bourgonje
- Department of Gastroenterology and Hepatology, University Medical Centre Groningen, Groningen, The Netherlands
| | - H W Frijlink
- Pharmaceutical Technology and Biopharmacy, University of Groningen, Groningen, The Netherlands
| | - H J M Harmsen
- Department of Medical Microbiology, University Medical Centre Groningen, Groningen, The Netherlands
| | - A Rehman
- DSM Nutritional Products AG, Kaiseraugst, Switzerland
| | - M J E Campmans-Kuijpers
- Department of Gastroenterology and Hepatology, University Medical Centre Groningen, Groningen, The Netherlands
| | - G Dijkstra
- Department of Gastroenterology and Hepatology, University Medical Centre Groningen, Groningen, The Netherlands
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Shamaa H, Sun W, Peters V, Martignetti L, Valant E, Sparks D. Improve service coordination and delivery in community hubs serving homeless and at-risk populations. Eur J Public Health 2022. [PMCID: PMC9594622 DOI: 10.1093/eurpub/ckac130.002] [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] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Background Two community hubs are currently located in Durham Region, Ontario, Canada, to provide a single point of access to a wide range of support services for individuals experiencing homelessness and other at-risk populations. The community hub in Oshawa is formally known as the Back Door Mission for the Relief of Poverty and the community hub in Ajax is formally known as the Ajax Hygiene Hub. It is unclear if these two community hubs are effective in addressing the needs of individuals experiencing homelessness and how the COVID-19 pandemic continues to impact these services amongst this population. This study was conducted to identify gaps and barriers within the community hub models as well as provide recommendations to improve the coordination and delivery of services serving individuals experiencing homelessness and other at-risk populations. Methods A mixed methods approach was utilized in this study, which included surveys for individuals experiencing homelessness, through open-ended and close-ended questions to assess their experiences at either one of the two community hubs. A total of 75 surveys were completed by the study participants (40 surveys in Oshawa and 35 in Ajax). Thematic analysis was performed for all the open-ended survey responses. A literature review was also conducted to evaluate the community hub models as well as best practices for the implementation locally, nationally, and internationally. Results Data analysis for the open-ended survey responses revealed the need for housing support, increased resources for medical services, and the expansion of programs provided by the community hubs. Conclusions Homelessness is a major public health issue however community hubs play a pivotal role in addressing this concern in Durham Region. The equitable access to a diverse range of services that are co-located in a community hub is imperative for individuals experiencing homelessness, especially during the COVID-19 pandemic. Key messages
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Affiliation(s)
- H Shamaa
- Faculty of Health Sciences, Ontario Tech University , Oshawa, Canada
| | - W Sun
- Faculty of Health Sciences, Ontario Tech University , Oshawa, Canada
| | - V Peters
- Faculty of Health Sciences, Ontario Tech University , Oshawa, Canada
| | - L Martignetti
- Faculty of Health Sciences, Ontario Tech University , Oshawa, Canada
| | - E Valant
- Social Services, Regional Municipality of Durham , Oshawa, Canada
| | - D Sparks
- Office of the Regional Chair and CAO, Regional Municipality of Durham , Whitby, Canada
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Suratwala T, Steele R, Destino J, Wong L, Norton M, Laurence T, Aracne-Ruddle C, Miller P, Shen N, Feit M, Ray N, Carr W, Rivers C, Peters V, Jeppson S, Malone D, Greene W. Sapphire advanced mitigation process: wet etch to expose sub-surface damage and increase laser damage resistance and mechanical strength. Appl Opt 2020; 59:1602-1610. [PMID: 32225658 DOI: 10.1364/ao.381739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 12/19/2019] [Indexed: 06/10/2023]
Abstract
A novel, to the best of our knowledge, method of wet chemical etching of sapphire workpieces (such as optics, wafers, windows, and cones), called the sapphire advanced mitigation process (or sapphire AMP), has been developed that exposes sub-surface mechanical damage created during the optical fabrication process and significantly enhances the surface laser damage resistance ($ \gt {2{\times}}$>2×) and mechanical strength (up to $\sim{2.6{\times}}$∼2.6×). Sapphire AMP involves first treating the workpiece with a mixture of sulfuric and phosphoric acid $([{\rm H_{2}{\rm SO_{4}}}]:[{\rm H_{3}{\rm PO_{4}}}]=1:3)$([H2SO4]:[H3PO4]=1:3) at 220°C, followed with phosphoric acid at 160°C, then with sodium hydroxide base (NaOH) and surfactant at 40°C, and finally with a high-pressure deionized water spray rinse. Sapphire AMP has been demonstrated on both A- and C-plane sapphire workpieces. The mechanism of this etch process involves the reaction of the sapphire $({\rm Al_{2}}{\rm O_{3}})$(Al2O3) surface with sulfuric acid $({\rm H_{2}}{\rm SO_{4}})$(H2SO4) forming aluminum sulfate $[{{\rm Al}_2}{({{\rm SO}_4})_3}]$[Al2(SO4)3], which has low solubility. The high phosphoric acid content in the first and second steps of sapphire AMP results in the efficient conversion of ${{\rm Al}_2}{({{\rm SO}_4})_3}$Al2(SO4)3 to aluminum phosphate $({\rm AlPO_{4}})$(AlPO4), which is very soluble, greatly reducing reaction product redeposition on the workpiece surface. Sapphire AMP is shown to expose sub-surface mechanical damage on the sapphire surface created during the grinding and polishing processes, whose etched morphology has either isotropic or anisotropic evolution depending on the nature of the initial surface damage. Sapphire AMP was also designed to remove the key known surface, laser absorbing precursors (namely, foreign chemical impurities, the fracture surface layer of preexisting sub-surface damage, and reaction product or foreign species redeposition or precipitation). Static and sliding indention induced surface microfractures on sapphire are shown after sapphire AMP to have a significant decrease in the fast photoluminescence intensity (a known metric for measuring the degree of laser damaging absorbing precursors). In addition, the onset of laser damage (at 351 nm 3 ns) on sapphire AMP treated workpieces was shown to increase in fluence from $\sim{4}$∼4 to $ \gt {9}.{5}\;{{\rm J/cm}^2}$>9.5J/cm2. Finally, biaxial ball-on-ring mechanical tests on sapphire disks showed an increase in the failure stress from 340 MPa (with pre-existing 28 µm flaws) to $\sim{900}\;{\rm MPa}$∼900MPa after sapphire AMP, which is attributed to the blunting of the surface microfractures.
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Imhann F, Van der Velde KJ, Barbieri R, Alberts R, Voskuil MD, Vila AV, Collij V, Spekhorst LM, Van der Sloot KWJ, Peters V, Van Dullemen HM, Visschedijk MC, Festen EAM, Swertz MA, Dijkstra G, Weersma RK. Correction to: The 1000IBD project: multi-omics data of 1000 inflammatory bowel disease patients; data release 1. BMC Gastroenterol 2019; 19:44. [PMID: 30917794 PMCID: PMC6436211 DOI: 10.1186/s12876-019-0938-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 01/23/2019] [Indexed: 11/10/2022] Open
Affiliation(s)
- Floris Imhann
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - K J Van der Velde
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - R Barbieri
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - R Alberts
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - M D Voskuil
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - A Vich Vila
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - V Collij
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - L M Spekhorst
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - K W J Van der Sloot
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands
| | - V Peters
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands
| | - H M Van Dullemen
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands
| | - M C Visschedijk
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands
| | - E A M Festen
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.,Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - M A Swertz
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - G Dijkstra
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.
| | - R K Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB, Groningen, the Netherlands.
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Triolo TM, Fouts A, Pyle L, Yu L, Gottlieb PA, Steck AK, Greenbaum CJ, Atkinson M, Baidal D, Battaglia M, Becker D, Bingley P, Bosi E, Buckner J, Clements M, Colman P, DiMeglio L, Gitelman S, Goland R, Gottlieb P, Herold K, Knip M, Krischer J, Lernmark A, Moore W, Moran A, Muir A, Palmer J, Peakman M, Philipson L, Raskin P, Redondo M, Rodriguez H, Russell W, Spain L, Schatz D, Sosenko J, Wentworth J, Wherrett D, Wilson D, Winter W, Ziegler A, Anderson M, Antinozzi P, Benoist C, Blum J, Bourcier K, Chase P, Clare-Salzler M, Clynes R, Eisenbarth G, Fathman C, Grave G, Hering B, Insel R, Kaufman F, Kay T, Leschek E, Mahon J, Marks J, Nanto-Salonen K, Nepom G, Orban T, Parkman R, Pescovitz M, Peyman J, Pugliese A, Roep B, Roncarolo M, Savage P, Simell O, Sherwin R, Siegelman M, Skyler J, Steck A, Thomas J, Trucco M, Wagner J, Krischer JP, Leschek E, Rafkin L, Bourcier K, Cowie C, Foulkes M, Insel R, Krause-Steinrauf H, Lachin JM, Malozowski S, Peyman J, Ridge J, Savage P, Skyler JS, Zafonte SJ, Rafkin L, Sosenko JM, Kenyon NS, Santiago I, Krischer JP, Bundy B, Abbondondolo M, Dixit S, Pasha M, King K, Adcock H, Atterberry L, Fox K, Englert N, Mauras J, Permuy K, Sikes T, Adams T, Berhe B, Guendling L, McLennan L, Paganessi C, Murphy M, Draznin M, Kamboj S, Sheppard V, Lewis L, Coates W, Amado D, Moore G, Babar J, Bedard D, Brenson-Hughes J, Cernich M, Clements R, Duprau S, Goodman L, Hester L, Huerta-Saenz A, Asif I, Karmazin T, Letjen S, Raman D, Morin W, Bestermann E, Morawski J, White A, Brockmyer R, Bays S, Campbell A, Boonstra M, Stapleton N, Stone A, Donoho H, Everett H, Hensley M, Johnson C, Marshall N, Skirvin P, Taylor R, Williams L, Burroughs C, Ray C, Wolverton D, Nickels C, Dothard P, Speiser M, Pellizzari L, Bokor K, Izuora S, Abdelnour P, Cummings S, Cuthbertson D, Paynor M, Leahy M, Riedl S, Shockley R, Saad T, Briones S, Casella C, Herz K, Walsh J, Greening F, Deemer M, Hay S, Hunt N, Sikotra L, Simons D, Karounos R, Oremus L, Dye L, Myers D, Ballard W, Miers R, Eberhard C, Sparks K, Thraikill K, Edwards J, Fowlkes S, Kemp A, Morales L, Holland L, Johnson P, Paul A, Ghatak K, Fiske S, Phelen H, Leyland T, Henderson D, Brenner E, Oppenheimer I, Mamkin C, Moniz C, Clarson M, Lovell A, Peters V, Ford J, Ruelas D, Borut D, Burt M, Jordan S, Castilla P, Flores M, Ruiz L, Hanson J, Green-Blair R, Sheridan K, Garmeson J, Wintergerst G, Pierce A, Omoruyi M, Foster S, Kingery A, Lunsford I, Cervantes T, Parker P, Price J, Urben I, Guillette H, Doughty H, Haydock V, Parker P, Bergman S, Duncum C, Rodda A, Perelman R, Calendo C, Barrera E, Arce-Nunez Y, Geyer S, Martinez M, De la Portilla I, Cardenas L, Garrido M, Villar R, Lorini E, Calandra G, D’Annuzio K, Perri N, Minuto C, Hays B, Rebora R, Callegari O, Ali J, Kramer B, Auble S, Cabrera P, Donohoue R, Fiallo-Scharer M, Hessner P, Wolfgram A, Henderson C, Kansra N, Bettin R, McCuller A, Miller S, Accacha J, Corrigan E, Fiore R, Levine T, Mahoney C, Polychronakos V, Henry M, Gagne H, Starkman M, Fox D, Chin F, Melchionne L, Silverman I, Marshall L, Cerracchio J, Cruz A, Viswanathan J, Heyman K, Wilson S, Chalew S, Valley S, Layburn A, Lala P, Clesi M, Genet G, Uwaifo A, Charron T, Allerton W, Hsiao B, Cefalu L, Melendez-Ramirez R, Richards C, Alleyn E, Gustafson M, Lizanna J, Wahlen S, Aleiwe M, Hansen H, Wahlen C, Karges C, Levy A, Bonaccorso R, Rapaport Y, Tomer D, Chia M, Goldis L, Iazzetti M, Klein C, Levister L, Waldman E, Keaton N, Wallach M, Regelmann Z, Antal M, Aranda C, Reynholds A, Vinik P, Barlow M, Bourcier M, Nevoret J, Couper S, Kinderman A, Beresford N, Thalagne H, Roper J, Gibbons J, Hill S, Balleaut C, Brennan J, Ellis-Gage L, Fear T, Gray L, Law P, Jones C, McNerney L, Pointer N, Price K, Few D, Tomlinson N, Leech D, Wake C, Owens M, Burns J, Leinbach A, Wotherspoon A, Murray K, Short G, Curry S, Kelsey J, Lawson J, Porter S, Stevens E, Thomson S, Winship L, Liu S, Wynn E, Wiltshire J, Krebs P, Cresswell H, Faherty C, Ross L, Denvir J, Drew T, Randell P, Mansell S, Lloyd J, Bell S, Butler Y, Hooton H, Navarra A, Roper G, Babington L, Crate H, Cripps A, Ledlie C, Moulds R, Malloy J, Norton B, Petrova O, Silkstone C, Smith K, Ghai M, Murray V, Viswanathan M, Henegan O, Kawadry J, Olson L, Maddox K, Patterson T, Ahmad B, Flores D, Domek S, Domek K, Copeland M, George J, Less T, Davis M, Short A, Martin J, Dwarakanathan P, O’Donnell B, Boerner L, Larson M, Phillips M, Rendell K, Larson C, Smith K, Zebrowski L, Kuechenmeister M, Miller J, Thevarayapillai M, Daniels H, Speer N, Forghani R, Quintana C, Reh A, Bhangoo P, Desrosiers L, Ireland T, Misla C, Milliot E, Torres S, Wells J, Villar M, Yu D, Berry D, Cook J, Soder A, Powell M, Ng M, Morrison Z, Moore M, Haslam M, Lawson B, Bradley J, Courtney C, Richardson C, Watson E, Keely D, DeCurtis M, Vaccarcello-Cruz Z, Torres K, Muller S, Sandberg H, Hsiang B, Joy D, McCormick A, Powell H, Jones J, Bell S, Hargadon S, Hudson M, Kummer S, Nguyen T, Sauder E, Sutton K, Gensel R, Aguirre-Castaneda V, Benavides, Lopez D, Hemp S, Allen J, Stear E, Davis T, O’Donnell R, Jones A, Roberts J, Dart N, Paramalingam L, Levitt Katz N, Chaudhary K, Murphy S, Willi B, Schwartzman C, Kapadia D, Roberts A, Larson D, McClellan G, Shaibai L, Kelley G, Villa C, Kelley R, Diamond M, Kabbani T, Dajani F, Hoekstra M, Sadler K, Magorno J, Holst V, Chauhan N, Wilson P, Bononi M, Sperl A, Millward M, Eaton L, Dean J, Olshan H, Stavros T, Renna C, Milliard, Brodksy L, Bacon J, Quintos L, Topor S, Bialo B, Bancroft A, Soto W, Lagarde H, Tamura R, Lockemer T, Vanderploeg M, Ibrahim M, Huie V, Sanchez R, Edelen R, Marchiando J, Palmer T, Repas M, Wasson P, Wood K, Auker J, Culbertson T, Kieffer D, Voorhees T, Borgwardt L, DeRaad K, Eckert E, Isaacson H, Kuhn A, Carroll M, Xu P, Schubert G, Francis S, Hagan T, Le M, Penn E, Wickham C, Leyva K, Rivera J, Padilla I, Rodriguez N, Young K, Jospe J, Czyzyk B, Johnson U, Nadgir N, Marlen G, Prakasam C, Rieger N, Glaser E, Heiser B, Harris C, Alies P, Foster H, Slater K, Wheeler D, Donaldson M, Murray D, Hale R, Tragus D, Word J, Lynch L, Pankratz W, Badias F, Rogers R, Newfield S, Holland M, Hashiguchi M, Gottschalk A, Philis-Tsimikas R, Rosal S, Franklin S, Guardado N, Bohannon M, Baker A, Garcia T, Aguinaldo J, Phan V, Barraza D, Cohen J, Pinsker U, Khan J, Wiley L, Jovanovic P, Misra M, Bassi M, Wright D, Cohen K, Huang M, Skiles S, Maxcy C, Pihoker K, Cochrane J, Fosse S, Kearns M, Klingsheim N, Beam C, Wright L, Viles H, Smith S, Heller M, Cunningham A, Daniels L, Zeiden J, Field R, Walker K, Griffin L, Boulware D, Bartholow C, Erickson J, Howard B, Krabbenhoft C, Sandman A, Vanveldhuizen J, Wurlger A, Zimmerman K, Hanisch L, Davis-Keppen A, Bounmananh L, Cotterill J, Kirby M, Harris A, Schmidt C, Kishiyama C, Flores J, Milton W, Martin C, Whysham A, Yerka T, Bream S, Freels J, Hassing J, Webster R, Green P, Carter J, Galloway D, Hoelzer S, Roberts S, Said P, Sullivan H, Freeman D, Allen E, Reiter E, Feinberg C, Johnson L, Newhook D, Hagerty N, White L, Levandoski J, Kyllo M, Johnson C, Gough J, Benoit P, Iyer F, Diamond H, Hosono S, Jackman L, Barette P, Jones I, Sills S, Bzdick J, Bulger R, Ginem J, Weinstock I, Douek R, Andrews G, Modgill G, Gyorffy L, Robin N, Vaidya S, Crouch K, O’Brien C, Thompson N, Granger M, Thorne J, Blumer J, Kalic L, Klepek J, Paulett B, Rosolowski J, Horner M, Watkins J, Casey K, Carpenter C, Michelle Kieffer MH, Burns J, Horton C, Pritchard D, Soetaert A, Wynne C, Chin O, Molina C, Patel R, Senguttuvan M, Wheeler O, Lane P, Furet C, Steuhm D, Jelley S, Goudeau L, Chalmers D, Greer C, Panagiotopoulos D, Metzger D, Nguyen M, Horowitz M, Linton C, Christiansen E, Glades C, Morimoto M, Macarewich R, Norman K, Patin C, Vargas A, Barbanica A, Yu P, Vaidyanathan W, Nallamshetty L, Osborne R, Mehra S, Kaster S, Neace J, Horner G, Reeves C, Cordrey L, Marrs T, Miller S, Dowshen D, Oduah V, Doyle S, Walker D, Catte H, Dean M, Drury-Brown B, Hackman M, Lee S, Malkani K, Cullen K, Johnson P, Parrimon Y, Hampton M, McCarrell C, Curtis E, Paul, Zambrano Y, Paulus K, Pilger J, Ramiro J, Luvon Ritzie AQ, Sharma A, Shor A, Song X, Terry A, Weinberger J, Wootten M, Lachin JM, Foulkes M, Harding P, Krause-Steinrauf H, McDonough S, McGee PF, Owens Hess K, Phoebus D, Quinlan S, Raiden E, Batts E, Buddy C, Kirpatrick K, Ramey M, Shultz A, Webb C, Romesco M, Fradkin J, Leschek E, Spain L, Savage P, Aas S, Blumberg E, Beck G, Brillon D, Gubitosi-Klug R, Laffel L, Vigersky R, Wallace D, Braun J, Lernmark A, Lo B, Mitchell H, Naji A, Nerup J, Orchard T, Steffes M, Tsiatis A, Veatch R, Zinman B, Loechelt B, Baden L, Green M, Weinberg A, Marcovina S, Palmer JP, Weinberg A, Yu L, Babu S, Winter W, Eisenbarth GS, Bingley P, Clynes R, DiMeglio L, Eisenbarth G, Hays B, Leschek E, Marks J, Matheson D, Rafkin L, Rodriguez H, Spain L, Wilson D, Redondo M, Gomez D, McDonald A, Pena S, Pietropaolo M, Shippy K, Batts E, Brown T, Buckner J, Dove A, Hammond M, Hefty D, Klein J, Kuhns K, Letlau M, Lord S, McCulloch-Olson M, Miller L, Nepom G, Odegard J, Ramey M, Sachter E, St. Marie M, Stickney K, VanBuecken D, Vellek B, Webber C, Allen L, Bollyk J, Hilderman N, Ismail H, Lamola S, Sanda S, Vendettuoli H, Tridgell D, Monzavi R, Bock M, Fisher L, Halvorson M, Jeandron D, Kim M, Wood J, Geffner M, Kaufman F, Parkman R, Salazar C, Goland R, Clynes R, Cook S, Freeby M, Pat Gallagher M, Gandica R, Greenberg E, Kurland A, Pollak S, Wolk A, Chan M, Koplimae L, Levine E, Smith K, Trast J, DiMeglio L, Blum J, Evans-Molina C, Hufferd R, Jagielo B, Kruse C, Patrick V, Rigby M, Spall M, Swinney K, Terrell J, Christner L, Ford L, Lynch S, Menendez M, Merrill P, Pescovitz M, Rodriguez H, Alleyn C, Baidal D, Fay S, Gaglia J, Resnick B, Szubowicz S, Weir G, Benjamin R, Conboy D, deManbey A, Jackson R, Jalahej H, Orban T, Ricker A, Wolfsdorf J, Zhang HH, Wilson D, Aye T, Baker B, Barahona K, Buckingham B, Esrey K, Esrey T, Fathman G, Snyder R, Aneja B, Chatav M, Espinoza O, Frank E, Liu J, Perry J, Pyle R, Rigby A, Riley K, Soto A, Gitelman S, Adi S, Anderson M, Berhel A, Breen K, Fraser K, Gerard-Gonzalez A, Jossan P, Lustig R, Moassesfar S, Mugg A, Ng D, Prahalod P, Rangel-Lugo M, Sanda S, Tarkoff J, Torok C, Wesch R, Aslan I, Buchanan J, Cordier J, Hamilton C, Hawkins L, Ho T, Jain A, Ko K, Lee T, Phelps S, Rosenthal S, Sahakitrungruang T, Stehl L, Taylor L, Wertz M, Wong J, Philipson L, Briars R, Devine N, Littlejohn E, Grant T, Gottlieb P, Klingensmith G, Steck A, Alkanani A, Bautista K, Bedoy R, Blau A, Burke B, Cory L, Dang M, Fitzgerald-Miller L, Fouts A, Gage V, Garg S, Gesauldo P, Gutin R, Hayes C, Hoffman M, Ketchum K, Logsden-Sackett N, Maahs D, Messer L, Meyers L, Michels A, Peacock S, Rewers M, Rodriguez P, Sepulbeda F, Sippl R, Steck A, Taki I, Tran BK, Tran T, Wadwa RP, Zeitler P, Barker J, Barry S, Birks L, Bomsburger L, Bookert T, Briggs L, Burdick P, Cabrera R, Chase P, Cobry E, Conley A, Cook G, Daniels J, DiDomenico D, Eckert J, Ehler A, Eisenbarth G, Fain P, Fiallo-Scharer R, Frank N, Goettle H, Haarhues M, Harris S, Horton L, Hutton J, Jeffrrey J, Jenison R, Jones K, Kastelic W, King MA, Lehr D, Lungaro J, Mason K, Maurer H, Nguyen L, Proto A, Realsen J, Schmitt K, Schwartz M, Skovgaard S, Smith J, Vanderwel B, Voelmle M, Wagner R, Wallace A, Walravens P, Weiner L, Westerhoff B, Westfall E, Widmer K, Wright H, Schatz D, Abraham A, Atkinson M, Cintron M, Clare-Salzler M, Ferguson J, Haller M, Hosford J, Mancini D, Rohrs H, Silverstein J, Thomas J, Winter W, Cole G, Cook R, Coy R, Hicks E, Lewis N, Marks J, Pugliese A, Blaschke C, Matheson D, Pugliese A, Sanders-Branca N, Ray Arce LA, Cisneros M, Sabbag S, Moran A, Gibson C, Fife B, Hering B, Kwong C, Leschyshyn J, Nathan B, Pappenfus B, Street A, Boes MA, Peterson Eck S, Finney L, Albright Fischer T, Martin A, Jacqueline Muzamhindo C, Rhodes M, Smith J, Wagner J, Wood B, Becker D, Delallo K, Diaz A, Elnyczky B, Libman I, Pasek B, Riley K, Trucco M, Copemen B, Gwynn D, Toledo F, Rodriguez H, Bollepalli S, Diamond F, Eyth E, Henson D, Lenz A, Shulman D, Raskin P, Adhikari S, Dickson B, Dunnigan E, Lingvay I, Pruneda L, Ramos-Roman M, Raskin P, Rhee C, Richard J, Siegelman M, Sturges D, Sumpter K, White P, Alford M, Arthur J, Aviles-Santa ML, Cordova E, Davis R, Fernandez S, Fordan S, Hardin T, Jacobs A, Kaloyanova P, Lukacova-Zib I, Mirfakhraee S, Mohan A, Noto H, Smith O, Torres N, Wherrett D, Balmer D, Eisel L, Kovalakovska R, Mehan M, Sultan F, Ahenkorah B, Cevallos J, Razack N, Jo Ricci M, Rhode A, Srikandarajah M, Steger R, Russell WE, Black M, Brendle F, Brown A, Moore D, Pittel E, Robertson A, Shannon A, Thomas JW, Herold K, Feldman L, Sherwin R, Tamborlane W, Weinzimer S, Toppari J, Kallio T, Kärkkäinen M, Mäntymäki E, Niininen T, Nurmi B, Rajala P, Romo M, Suomenrinne S, Näntö-Salonen K, Simell O, Simell T, Bosi E, Battaglia M, Bianconi E, Bonfanti R, Grogan P, Laurenzi A, Martinenghi S, Meschi F, Pastore M, Falqui L, Teresa Muscato M, Viscardi M, Bingley P, Castleden H, Farthing N, Loud S, Matthews C, McGhee J, Morgan A, Pollitt J, Elliot-Jones R, Wheaton C, Knip M, Siljander H, Suomalainen H, Colman P, Healy F, Mesfin S, Redl L, Wentworth J, Willis J, Farley M, Harrison L, Perry C, Williams F, Mayo A, Paxton J, Thompson V, Volin L, Fenton C, Carr L, Lemon E, Swank M, Luidens M, Salgam M, Sharma V, Schade D, King C, Carano R, Heiden J, Means N, Holman L, Thomas I, Madrigal D, Muth T, Martin C, Plunkett C, Ramm C, Auchus R, Lane W, Avots E, Buford M, Hale C, Hoyle J, Lane B, Muir A, Shuler S, Raviele N, Ivie E, Jenkins M, Lindsley K, Hansen I, Fadoju D, Felner E, Bode B, Hosey R, Sax J, Jefferies C, Mannering S, Prentis R, She J, Stachura M, Hopkins D, Williams J, Steed L, Asatapova E, Nunez S, Knight S, Dixon P, Ching J, Donner T, Longnecker S, Abel K, Arcara K, Blackman S, Clark L, Cooke D, Plotnick L, Levin P, Bromberger L, Klein K, Sadurska K, Allen C, Michaud D, Snodgrass H, Burghen G, Chatha S, Clark C, Silverberg J, Wittmer C, Gardner J, LeBoeuf C, Bell P, McGlore O, Tennet H, Alba N, Carroll M, Baert L, Beaton H, Cordell E, Haynes A, Reed C, Lichter K, McCarthy P, McCarthy S, Monchamp T, Roach J, Manies S, Gunville F, Marosok L, Nelson T, Ackerman K, Rudolph J, Stewart M, McCormick K, May S, Falls T, Barrett T, Dale K, Makusha L, McTernana C, Penny-Thomas K, Sullivan K, Narendran P, Robbie J, Smith D, Christensen R, Koehler B, Royal C, Arthur T, Houser H, Renaldi J, Watsen S, Wu P, Lyons L, House B, Yu J, Holt H, Nation M, Vickers C, Watling R, Heptulla R, Trast J, Agarwal C, Newell D, Katikaneni R, Gardner C, Del A, Rio A, Logan H, Collier C, Rishton G, Whalley A, Ali S, Ramtoola T, Quattrin L, Mastrandea A, House M, Ecker C, Huang C, Gougeon J, Ho D, Pacuad D, Dunger J, May C, O’Brien C, Acerini B, Salgin A, Thankamony R, Williams J, Buse G, Fuller M, Duclos J, Tricome H, Brown D, Pittard D, Bowlby A, Blue T, Headley S, Bendre K, Lewis K, Sutphin C, Soloranzo J, Puskaric H, Madison M, Rincon M, Carlucci R, Shridharani B, Rusk E, Tessman D, Huffman H, Abrams B, Biederman M, Jones V, Leathers W, Brickman P, Petrie D, Zimmerman J, Howard L, Miller R, Alemzadeh D, Mihailescu R, Melgozza-Walker N, Abdulla C, Boucher-Berry D, Ize-Ludlow R, Levy C, Swenson, Brousell N, Crimmins D, Edler T, Weis C, Schultz D, Rogers D, Latham C, Mawhorter C, Switzer W, Spencer P, Konstantnopoulus S, Broder J, Klein L, Knight L, Szadek G, Welnick B, Thompson R, Hoffman A, Revell J, Cherko K, Carter E, Gilson J, Haines G, Arthur B, Bowen W, Zipf P, Graves R, Lozano D, Seiple K, Spicer A, Chang J, Fregosi J, Harbinson C, Paulson S, Stalters P, Wright D, Zlock A, Freeth J, Victory H, Maheshwari A, Maheshwari T, Holmstrom J, Bueno R, Arguello J, Ahern L, Noreika V, Watson S, Hourse P, Breyer C, Kissel Y, Nicholson M, Pfeifer S, Almazan J, Bajaj M, Quinn K, Funk J, McCance E, Moreno R, Veintimilla A, Wells J, Cook S, Trunnel J, Henske S, Desai K, Frizelis F, Khan R, Sjoberg K, Allen P, Manning G, Hendry B, Taylor S, Jones W, Strader M, Bencomo T, Bailey L, Bedolla C, Roldan C, Moudiotis B, Vaidya C, Anning S, Bunce S, Estcourt E, Folland E, Gordon C, Harrill J, Ireland J, Piper L, Scaife K, Sutton S, Wilkins M, Costelloe J, Palmer L, Casas C, Miller M, Burgard C, Erickson J, Hallanger-Johnson P, Clark W, Taylor A, Lafferty S, Gillett C, Nolan M, Pathak L, Sondrol T, Hjelle S, Hafner J, Kotrba R, Hendrickson A, Cemeroglu T, Symington M, Daniel Y, Appiagyei-Dankah D, Postellon M, Racine L, Kleis K, Barnes S, Godwin H, McCullough K, Shaheen G, Buck L, Noel M, Warren S, Weber S, Parker I, Gillespie B, Nelson C, Frost J, Amrhein E, Moreland A, Hayes J, Peggram J, Aisenberg M, Riordan J, Zasa E, Cummings K, Scott T, Pinto A, Mokashi K, McAssey E, Helden P, Hammond L, Dinning S, Rahman S, Ray C, Dimicri S, Guppy H, Nielsen C, Vogel C, Ariza L, Morales Y, Chang R, Gabbay L, Ambrocio L, Manley R, Nemery W, Charlton P, Smith L, Kerr B, Steindel-Kopp M, Alamaguer D, Liljenquist G, Browning T, Coughenour M, Sulk E, Tsalikan M, Tansey J, Cabbage N. Identical and Nonidentical Twins: Risk and Factors Involved in Development of Islet Autoimmunity and Type 1 Diabetes. Diabetes Care 2019; 42:192-199. [PMID: 30061316 PMCID: PMC6341285 DOI: 10.2337/dc18-0288] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [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: 02/07/2018] [Accepted: 06/28/2018] [Indexed: 02/03/2023]
Abstract
OBJECTIVE There are variable reports of risk of concordance for progression to islet autoantibodies and type 1 diabetes in identical twins after one twin is diagnosed. We examined development of positive autoantibodies and type 1 diabetes and the effects of genetic factors and common environment on autoantibody positivity in identical twins, nonidentical twins, and full siblings. RESEARCH DESIGN AND METHODS Subjects from the TrialNet Pathway to Prevention Study (N = 48,026) were screened from 2004 to 2015 for islet autoantibodies (GAD antibody [GADA], insulinoma-associated antigen 2 [IA-2A], and autoantibodies against insulin [IAA]). Of these subjects, 17,226 (157 identical twins, 283 nonidentical twins, and 16,786 full siblings) were followed for autoantibody positivity or type 1 diabetes for a median of 2.1 years. RESULTS At screening, identical twins were more likely to have positive GADA, IA-2A, and IAA than nonidentical twins or full siblings (all P < 0.0001). Younger age, male sex, and genetic factors were significant factors for expression of IA-2A, IAA, one or more positive autoantibodies, and two or more positive autoantibodies (all P ≤ 0.03). Initially autoantibody-positive identical twins had a 69% risk of diabetes by 3 years compared with 1.5% for initially autoantibody-negative identical twins. In nonidentical twins, type 1 diabetes risk by 3 years was 72% for initially multiple autoantibody-positive, 13% for single autoantibody-positive, and 0% for initially autoantibody-negative nonidentical twins. Full siblings had a 3-year type 1 diabetes risk of 47% for multiple autoantibody-positive, 12% for single autoantibody-positive, and 0.5% for initially autoantibody-negative subjects. CONCLUSIONS Risk of type 1 diabetes at 3 years is high for initially multiple and single autoantibody-positive identical twins and multiple autoantibody-positive nonidentical twins. Genetic predisposition, age, and male sex are significant risk factors for development of positive autoantibodies in twins.
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Affiliation(s)
- Taylor M. Triolo
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Alexandra Fouts
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Laura Pyle
- Department of Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Liping Yu
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Peter A. Gottlieb
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
| | - Andrea K. Steck
- Barbara Davis Center for Diabetes, University of Colorado School of Medicine, Aurora, CO
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Imhann F, Van der Velde KJ, Barbieri R, Alberts R, Voskuil MD, Vich Vila A, Collij V, Spekhorst LM, der Sloot KWJ V, Peters V, Van Dullemen HM, Visschedijk MC, EAM F, Swertz MA, Dijkstra G, Weersma RK. The 1000IBD project: multi-omics data of 1000 inflammatory bowel disease patients; data release 1. BMC Gastroenterol 2019; 19:5. [PMID: 30621600 PMCID: PMC6325838 DOI: 10.1186/s12876-018-0917-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 12/06/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Inflammatory bowel disease (IBD) is a chronic complex disease of the gastrointestinal tract. Patients with IBD can experience a wide range of symptoms, but the pathophysiological mechanisms that cause these individual differences in clinical presentation remain largely unknown. In consequence, IBD is currently classified into subtypes using clinical characteristics. If we are to develop a more targeted treatment approach, molecular subtypes of IBD need to be discovered that can be used as new drug targets. To achieve this, we need multiple layers of molecular data generated from the same IBD patients. CONSTRUCTION AND CONTENT We initiated the 1000IBD project ( https://1000ibd.org ) to prospectively follow more than 1000 IBD patients from the Northern provinces of the Netherlands. For these patients, we have collected a uniquely large number of phenotypes and generated multi-omics profiles. To date, 1215 participants have been enrolled in the project and enrolment is on-going. Phenotype data collected for these participants includes information on dietary and environmental factors, drug responses and adverse drug events. Genome information has been generated using genotyping (ImmunoChip, Global Screening Array and HumanExomeChip) and sequencing (whole exome sequencing and targeted resequencing of IBD susceptibility loci), transcriptome information generated using RNA-sequencing of intestinal biopsies and microbiome information generated using both sequencing of the 16S rRNA gene and whole genome shotgun metagenomic sequencing. UTILITY AND DISCUSSION All molecular data generated within the 1000IBD project will be shared on the European Genome-Phenome Archive ( https://ega-archive.org , accession no: EGAS00001002702). The first data release, detailed in this announcement and released simultaneously with this publication, will contain basic phenotypes for 1215 participants, genotypes of 314 participants and gut microbiome data from stool samples (315 participants) and biopsies (107 participants) generated by tag sequencing the 16S gene. Future releases will comprise many more additional phenotypes and -omics data layers. 1000IBD data can be used by other researchers as a replication cohort, a dataset to test new software tools, or a dataset for applying new statistical models. CONCLUSIONS We report on the establishment and future development of the 1000IBD project: the first comprehensive multi-omics dataset aimed at discovering IBD biomarker profiles and treatment targets.
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Affiliation(s)
- Floris Imhann
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - K. J. Van der Velde
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - R. Barbieri
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - R. Alberts
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - M. D. Voskuil
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - A. Vich Vila
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - V. Collij
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - L. M. Spekhorst
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - Van der Sloot KWJ
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
| | - V. Peters
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
| | - H. M. Van Dullemen
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
| | - M. C. Visschedijk
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
| | - Festen EAM
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - M. A. Swertz
- Department of Genetics, University of Groningen and University Medical Center Groningen, Groningen, the Netherlands
| | - G. Dijkstra
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
| | - R. K. Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, PO Box 30.001, 9700RB Groningen, the Netherlands
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Sjaastad O, Blau N, Rydning SL, Peters V, Rødningen O, Stray-Pedersen A, Krossnes B, Tallaksen C, Koht J. Homocarnosinosis: A historical update and findings in the SPG11 gene. Acta Neurol Scand 2018; 138:245-250. [PMID: 29732542 DOI: 10.1111/ane.12949] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/10/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVES A family with homocarnosinosis was reported in the literature in 1976. Three affected siblings had spastic paraplegia, retinitis pigmentosa, mental retardation, and cerebrospinal fluid (CSF) homocarnosine concentrations 20 times higher than in controls. Based on the clinical findings and new genetic techniques, we have been able to establish a precise genetic diagnosis. METHOD The medical records were re-evaluated, and genetic analyses were performed post-mortem in this original family. SNP array-based whole genome homozygosity mapping and Sanger sequencing of the SPG11 gene were performed. Seven additional Norwegian SPG11 patients and their disease-causing variants and clinical findings were evaluated. Homocarnosine levels in CSF were measured in four of these seven patients. RESULTS A homozygous pathogenic splice-site variant in the SPG11 gene, c.2316 + 1G>A, was found. The clinical findings in the original family correlate with the heterogeneous SPG11 phenotype. The same variant was found in seven other Norwegian SPG11 patients, unrelated to the original family, either as homozygous or compound heterozygous constellation. Normal homocarnosine levels were found in the CSF of all unrelated SPG11 patients. CONCLUSIONS A re-evaluation of the clinical symptoms and findings in the original family correlates with the SPG11 phenotype. The increased levels of homocarnosine do not seem to be a biomarker for SPG11 in our patients. Homocarnosinosis is still a biochemical aberration with unknown clinical significance.
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Affiliation(s)
- O. Sjaastad
- Department of Neurology; St.Olavs Hospital; Trondheim University Hospital; Trondheim Norway
| | - N. Blau
- Centre for Pediatric and Adolescence Medicine; University of Heidelberg; Heidelberg Germany
| | - S. L. Rydning
- Department of Neurology; Oslo University Hospital; Oslo Norway
- Institute of Clinical Medicine; University of Oslo; Oslo Norway
| | - V. Peters
- Centre for Pediatric and Adolescence Medicine; University of Heidelberg; Heidelberg Germany
| | - O. Rødningen
- Department of Medical Genetics; Oslo University Hospital; Oslo Norway
| | - A. Stray-Pedersen
- Norwegian National Unit for Newborn Screening at Division of Pediatric and Adolescent Medicine; Oslo University Hospital; Oslo Norway
- Institute of Clinical Medicine; University of Oslo; Oslo Norway
| | - B. Krossnes
- Department of Pathology; Oslo University Hospital; Oslo Norway
| | - C. Tallaksen
- Department of Neurology; Oslo University Hospital; Oslo Norway
- Institute of Clinical Medicine; University of Oslo; Oslo Norway
| | - J. Koht
- Department of Neurology; Drammen Hospital; Vestre Viken Hospital Trust; Drammen Norway
- Institute of Clinical Medicine; University of Oslo; Oslo Norway
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Qiu J, Hauske S, Zhang S, Rodriguez A, Albrecht T, Pastene D, Krämer B, Peters V, Yard B, Kannt A. Identification and characterisation of carnostatine (SAN9812), a potent and selective carnosinase (CN1) inhibitor with in-vivo activity. DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641888] [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: 10/28/2022]
Affiliation(s)
- J Qiu
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - S Hauske
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - S Zhang
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - A Rodriguez
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - T Albrecht
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - D Pastene
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - B Krämer
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - V Peters
- Universitätsklinikum Heidelberg, Dietmar-Hopp-Stoffwechselzentrum, Heidelberg, Germany
| | - B Yard
- Universitätsklinikum Mannheim, 5. Med.Klinik/Nephrologie, Mannheim, Germany
| | - A Kannt
- Sanofi-Aventis Deutschland GmbH, Research and Development, Frankfurt, Germany
- Universität Heidelberg- Medizinische Fakultät Mannheim, Institut für experimentelle Pharmakologie, Mannheim, Germany
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Khan S, Peters V, Kowalewski J, Odelius M. Zero-field splitting in the isoelectronic aqueous Gd(III) and Eu(II) complexes from a first principles analysis. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.02.002] [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: 11/24/2022]
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Weigand T, Schmitt CP, Nawroth P, Vistoli G, Peters V. Carnosinase-Inhibition als Schutz vor Diabetischer Nephropathie. DIABETOL STOFFWECHS 2017. [DOI: 10.1055/s-0037-1603540] [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: 10/19/2022]
Affiliation(s)
- T Weigand
- University of Heidelberg, Centre for Paediatric and Adolescent Medicine, Heidelberg, Germany
| | - CP Schmitt
- University of Heidelberg, Centre for Paediatric and Adolescent Medicine, Heidelberg, Germany
| | - P Nawroth
- University of Heidelberg, Centre for Internal Medicine, Heidelberg, Germany
| | - G Vistoli
- Università degli Studi di Milano, Department of Pharmaceutical Sciences, Milano, Italy
| | - V Peters
- University of Heidelberg, Centre for Paediatric and Adolescent Medicine, Heidelberg, Germany
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Weigand T, Peters V, Kebbewar M, Janssen B, Hoffmann GF, Möller K, Wygoda S, Charbit M, Fernandes-Teixeira A, Jeck N, Zschocke JZ, Schmitt CP, Schaefer F, Wühl E. Der Carnosinase-Genotyp beeinflusst die Progression der chronischen Niereninsuffizenz bei Kindern mit Glomerulopathien. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580824] [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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12
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Weigand T, Pfister F, Dodel S, Singler B, Klingbeil K, Schmitt CP, Peters V. Carnosinstoffwechsel der menschlichen Niere unter Diabetes mellitus. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580900] [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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13
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Peters V, de Rijk A, Engels J, Heerkens Y, Nijhuis F. A new typology of work schedules: Evidence from a cross-sectional study among nurses working in residential elder care. Work 2016; 54:21-33. [PMID: 27061694 DOI: 10.3233/wor-162286] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Work schedules contribute substantially to the health and well-being of nurses. Too broad typologies are used in research that do not meet the current variety in work schedules. OBJECTIVE To develop a new typology for nurses' work schedules based on five requirements and to validate the typology. METHODS This study is based on a questionnaire returned by 498 nurses (response 51%) including questions regarding nurses' work schedule, socio-demographic, and family characteristics and their appraisal of the work schedule. Frequencies of the different schedules were computed to determine the typology. To validate the typology, differences between the types were tested with ANOVAs, Chi2 and Kruskal-Wallis tests. RESULTS Five main types can be distinguished based on predetermined requirements and frequencies, namely: (1) fixed early shift, (2) rotating two shift pattern without night shift, (3) rotating three shift pattern, (4) fixed and rotating two shift pattern including night shift, and (5) fixed normal day or afternoon shifts. Nurses in these types of work schedule differed significantly with respect to hours worked, days off between shifts, age, education, years in the job, commuting time, contribution to household income, satisfaction with work schedule and work schedule control. Especially nurses with type 3 schedules differed from other types. CONCLUSIONS A typology of five main types of work schedules is proposed. Content validity of the typology is sufficient and the new typology seems useful for research on work-related aspects of nursing.
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Affiliation(s)
- V Peters
- Health Promotion & Performance, Institute of Sport and Exercise, Faculty of Health and Social Studies, HAN University of Applied Sciences, Nijmegen, The Netherlands
| | - A de Rijk
- Department of Social Medicine, Research Institute Primary Care and Public Health (CAPHRI), Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, The Netherlands
| | - J Engels
- Department of Occupation & Health, Faculty of Health and Social Studies, HAN Universityof Applied Sciences, Nijmegen, The Netherlands
| | - Y Heerkens
- Department of Occupation & Health, Faculty of Health and Social Studies, HAN Universityof Applied Sciences, Nijmegen, The Netherlands
| | - F Nijhuis
- Department of Work and Social Psychology, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
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Dierx J, Detaille S, Boonekamp G, Peters V, JCuperus P, van Hove L, Vaandrager. Tripple-I method empowers professional vocational education students in mobilizing their assets. Eur J Public Health 2015. [DOI: 10.1093/eurpub/ckv172.037] [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: 11/14/2022] Open
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15
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Zhang S, Pfister F, Lindner H, Albrecht T, Classen S, Kabtni S, Peters V, Klessens C, van den Born J, Navis G, Bakker S, de Heer E, Krämer B, Yard B, Hauske S. Carnosinase concentration and activity in CNDP1 (CTG)5 homozygous T2DM patients with and without nephropathy. DIABETOL STOFFWECHS 2015. [DOI: 10.1055/s-0035-1549666] [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: 10/23/2022]
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Hofmann KP, Katz S, Herzig S, Nawroth PP, Kroll J, Peters V, Gröne HJ, Müller OJ, Backs J. Die Rolle oxidierter CaM Kinase II bei diabetischer Nephropathie. DIABETOL STOFFWECHS 2015. [DOI: 10.1055/s-0035-1549636] [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: 10/23/2022]
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Peters V, Lanthaler B, Amberger A, Fleming T, Forsberg E, Hecker M, Wagner A, Hoffmann GF, Nawroth P, Zschocke J, Schmitt CP. Post-translational control of carnosinase activitiy in diabetes. DIABETOL STOFFWECHS 2015. [DOI: 10.1055/s-0035-1549687] [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: 10/23/2022]
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18
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Izarova NV, Klaß L, de Oliveira P, Mbomekalle IM, Peters V, Haarmann F, Kögerler P. Tin(ii)-functionalization of the archetypal {P8W48} polyoxotungstate. Dalton Trans 2015; 44:19200-6. [PMID: 26486421 DOI: 10.1039/c5dt03164h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of {SnII8P8W48}, the first example of the archetypal {P8W48}-type polyoxotungstate cluster functionalized with the main group metal ions, elucidates the critical reaction parameters that have to be adjusted to avoid numerous competing side reactions.
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Affiliation(s)
- N. V. Izarova
- Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute – PGI 6
- D-52425 Jülich
- Germany
| | - L. Klaß
- Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute – PGI 6
- D-52425 Jülich
- Germany
- Institute of Inorganic Chemistry
- RWTH Aachen University
| | - P. de Oliveira
- Equipe d'Electrochimie et de Photoélectrochimie
- Laboratoire de Chimie-Physique
- Université Paris-Sud
- Orsay F-91405
- France
| | - I.-M. Mbomekalle
- Equipe d'Electrochimie et de Photoélectrochimie
- Laboratoire de Chimie-Physique
- Université Paris-Sud
- Orsay F-91405
- France
| | - V. Peters
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52074 Aachen
- Germany
| | - F. Haarmann
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52074 Aachen
- Germany
| | - P. Kögerler
- Jülich-Aachen Research Alliance (JARA-FIT) and Peter Grünberg Institute – PGI 6
- D-52425 Jülich
- Germany
- Institute of Inorganic Chemistry
- RWTH Aachen University
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19
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Peters V, Riedl E, Braunagel M, Höger S, Hauske S, Pfister F, Zschocke J, Lanthaler B, Benck U, Hammes HP, Krämer BK, Schmitt CP, Yard BA, Köppel H. Carnosine treatment in combination with ACE inhibition in diabetic rats. ACTA ACUST UNITED AC 2014; 194-195:36-40. [PMID: 25234296 DOI: 10.1016/j.regpep.2014.09.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [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: 06/16/2014] [Revised: 09/08/2014] [Accepted: 09/11/2014] [Indexed: 10/24/2022]
Abstract
In humans, we reported an association of a certain allele of carnosinase gene with reduced carnosinase activity and absence of nephropathy in diabetic patients. CN1 degrades histidine dipeptides such as carnosine and anserine. Further, we and others showed that treatment with carnosine improves renal function and wound healing in diabetic mice and rats. We now investigated the effects of carnosine treatment alone and in combination with ACE inhibition, a clinically established nephroprotective drug in diabetic nephropathy. Male Sprague-Dawley rats were injected i.v. with streptozotocin (STZ) to induce diabetes. After 4 weeks, rats were unilaterally nephrectomized and randomized for 24 weeks of treatment with carnosine, lisinopril or both. Renal CN1 protein concentrations were increased under diabetic conditions which correlated with decreased anserine levels. Carnosine treatment normalized CN1 abundance and reduced glucosuria, blood concentrations of glycosylated hemoglobin (HbA1c), carboxyl-methyl lysine (CML), N-acetylglucosamine (GlcNac; all p<0.05 vs. non-treated STZ rats), reduced cataract formation (p<0.05) and urinary albumin excretion (p<0.05), preserved podocyte number (p<0.05) and normalized the increased renal tissue CN1 protein concentration. Treatment with lisinopril had no effect on HbA1C, glucosuria, cataract formation and CN1 concentration, but reduced albumin excretion rate more effectively than carnosine treatment (p<0.05). Treatment with both carnosine and lisinopril combined the effects of single treatment, albeit without additive effect on podocyte number or albuminuria. Increased CN1 amount resulted in decreased anserine levels in the kidney. Both carnosine and lisinopril exert distinct beneficial effects in a standard model of diabetic nephropathy. Both drugs administered together combine the respective effects of single treatment, albeit without exerting additive nephroprotection.
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Affiliation(s)
- V Peters
- Centre for Pediatric and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany.
| | - E Riedl
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - M Braunagel
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - S Höger
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - S Hauske
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - F Pfister
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - J Zschocke
- Division of Human Genetics, Medical University Innsbruck, Austria
| | - B Lanthaler
- Division of Human Genetics, Medical University Innsbruck, Austria
| | - U Benck
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - H-P Hammes
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - B K Krämer
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - C P Schmitt
- Centre for Pediatric and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
| | - B A Yard
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - H Köppel
- Vth Department of Medicine, Nephrology, Endocrinology, Diabetology & Rheumatology, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
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Abstract
AbstractDiabetic nephropathy is the leading cause of end stage renal diseases worldwide. Even though several diabetic animal models exist, not a single one develops renal changes sufficiently reflecting those seen in humans. This review provides an overview on mouse models presenting with various features of diabetic nephropathy. The critical analysis and comparison of existing mouse models substantially enhances our understanding of the disease process and should provide a guide for choosing the most suitable mouse model for the investigation of diabetic nephropathy.
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Affiliation(s)
- V. Peters
- Division of Metabolic Diseases, Centre for Paediatric and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
| | - C. Schmitt
- Division of Paediatric Nephrology, Centre for Paediatric and Adolescent Medicine, University of Heidelberg, Heidelberg, Germany
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21
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Ford HE, Peters V, Martin NM, Sleeth ML, Ghatei MA, Frost GS, Bloom SR. Effects of oral ingestion of sucralose on gut hormone response and appetite in healthy normal-weight subjects. Eur J Clin Nutr 2011; 65:508-13. [DOI: 10.1038/ejcn.2010.291] [Citation(s) in RCA: 137] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
Strictly anaerobic bacteria such as methanogenic, sulfate-reducing, and homoacetogenic bacteria could be enriched from all five oxic soils tested. The number of cells was lower than that in typical anoxic habitats. Spores did not always dominate the population of sulfate-reducing bacteria. In all soils, the methanogenic population displayed a long lag phase after anoxic conditions were imposed before methane production began.
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23
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Mooyaart AL, van Valkengoed IGM, Shaw PKC, Peters V, Baelde HJ, Rabelink TJ, Bruijn JA, Stronks K, de Heer E. Lower frequency of the 5/5 homozygous CNDP1 genotype in South Asian Surinamese. Diabetes Res Clin Pract 2009; 85:272-8. [PMID: 19577318 DOI: 10.1016/j.diabres.2009.06.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Revised: 04/30/2009] [Accepted: 06/01/2009] [Indexed: 11/28/2022]
Abstract
We investigated the frequency of the 5/5 homozygous CNDP1 (carnosinase) genotype, which was found to be associated with a reduced risk of developing diabetic nephropathy, in three ethnic groups in The Netherlands. Particularly interesting were the South Asian Surinamese, who have a high prevalence of diabetic nephropathy. Furthermore, we investigated the association between this gene and carnosinase activity in South Asian Surinamese and whether carnosinase was expressed in the kidney. We genotyped 290 South Asian Surinamese, 532 African Surinamese, and 472 White Dutch in a cross-sectional population study. Furthermore, an independent cohort of South Asian Surinamese was genotyped. In this population, carnosinase activity was measured in serum. Immunostaining and in situ hybridization for CNDP1 were performed on kidney tissue. Both South Asian populations had lower frequencies of the 5/5 homozygous genotype than African Surinamese and White Dutch (23.0%, 27.2%, 38.2%, and 41.3%, respectively; chi-square, p<0.001). This genotype showed a lower carnosinase activity in South Asian Surinamese (Wilcoxon rank-sum, p=0.03). CNDP1 was expressed in the kidney. South Asian Surinamese have a lower frequency of the 5/5 homozygous genotype, which was associated with lower carnosinase activity. Our study provides an indication that South Asian Surinamese are genetically at risk for developing diabetic nephropathy.
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Affiliation(s)
- A L Mooyaart
- Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands.
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Peters V, Garbade SF, Langhans CD, Hoffmann GF, Pollitt RJ, Downing M, Bonham JR. Qualitative urinary organic acid analysis: methodological approaches and performance. J Inherit Metab Dis 2008; 31:690-6. [PMID: 18985434 DOI: 10.1007/s10545-008-0986-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2008] [Revised: 08/06/2008] [Accepted: 09/15/2008] [Indexed: 10/21/2022]
Abstract
A programme for proficiency testing of biochemical genetics laboratories undertaking urinary qualitative organic acid analysis and its results for 50 samples examined for factors contributing to poor performance are described. Urine samples from patients in whom inherited metabolic disorders have been confirmed as well as control urines were circulated to participants and the results from 94 laboratories were evaluated. Laboratories showed variability both in terms of their individual performance and on a disease-specific basis. In general, conditions including methylmalonic aciduria, propionic aciduria, isovaleric aciduria, mevalonic aciduria, Canavan disease and 3-methylcrotonyl-CoA carboxylase were readily identified. Detection was poorer for other diseases such as glutaric aciduria type II, glyceric aciduria and, in one sample, 3-methylcrotonyl-CoA carboxylase deficiency. To identify the factors that allow some laboratories to perform well on a consistent basis while others perform badly, we devised a questionnaire and compared the responses with the results for performance in the scheme. A trend towards better performance could be demonstrated for those laboratories that regularly use internal quality control (QC) samples in their sample preparation (p = 0.079) and those that participate in further external quality assurance (EQA) schemes (p = 0,040). Clinicians who depend upon these diagnostic services to identify patients with these defects and the laboratories that provide them should be aware of the potential for missed diagnoses and the factors that may lead to improved performance.
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Affiliation(s)
- V Peters
- University Children's Hospital, Division of Metabolic Diseases, Heidelberg, Germany.
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Janssen B, Hohenadel D, Brinkkoetter P, Peters V, Rind N, Fischer C, Rychlik I, Cerna M, Romzova M, de Heer E, Baelde H, Bakker SJ, Zirie M, Rondeau E, Mathieson P, Saleem MA, Meyer J, Köppel H, Sauerhoefer S, Bartram CR, Nawroth P, Hammes HP, Yard BA, Zschokke J, van der Woude FJ. Carnosinase Gene—Is It Responsible for Diabetic Nephropathy? J Am Soc Nephrol 2005; 16:2823-2826. [PMID: 37000932 DOI: 10.1681/01.asn.0000926760.87704.9b] [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: 03/28/2023] Open
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26
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Gan-Schreier H, Okun JG, Kohlmueller D, Langhans CD, Peters V, Ten Brink HJ, Verhoeven NM, Jakobs C, Voelkl A, Hoffmann GF. Measurement of bile acid CoA esters by high-performance liquid chromatography-electrospray ionisation tandem mass spectrometry (HPLC-ESI-MS/MS). J Mass Spectrom 2005; 40:882-9. [PMID: 15892178 DOI: 10.1002/jms.864] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The novel and rapid assay presented here combines high-performance liquid chromatography and electrospray ionisation tandem mass spectrometry (HPLC-ESI-MS/MS) to directly measure and quantify the CoA esters of 3alpha,7alpha,12alpha-trihydroxy- and 3alpha,7alpha-dihydroxy-5beta-cholestan-26-oic acid (THCA and DHCA). The latter are converted inside peroxisomes to the primary bile acids, cholic and chenodeoxycholic acids, respectively. Prior to MS/MS, esters were separated by reversed-phase HPLC on a C(18) column using an isocratic mobile phase (acetonitrile/water/2-propanol) and subsequently detected by multiple reaction monitoring. For quantification, the CoA ester of deuterium-labelled 3alpha,7alpha,12alpha-trihydroxy-5beta-cholan-24-oic acid (d(4)-CA) was used as internal standard. To complete an assay took less than 8 min. To verify the validity of the assay, the effect of peroxisomal proteins on the efficacy of extraction of the CoA esters was tested. To this end, variable amounts of the CoA esters were spiked with a fixed amount of either intact peroxisomes or peroxisomal matrix proteins and then extracted using a solid-phase extraction system. The CoA esters could be reproducibly recovered in the range of 0.1-4 micromol l(-1) (linear correlation coefficient R(2) > 0.99), with a detection limit of 0.1 micromol l(-1). In summary, electrospray ionization tandem mass spectrometry combined with HPLC as described here proved to be a rapid and versatile technique for the determination of bile acid CoA esters in a mixture with peroxisomal proteins. This suggests this technique to become a valuable tool in studies dealing with the multi-step biosynthesis of bile acids and its disturbances in disorders like the Zellweger syndrome.
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Affiliation(s)
- H Gan-Schreier
- Division of Inherited Metabolic Diseases, University Children's Hospital, D-69120 Heidelberg, Germany.
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Croner RS, Kulu Y, Hoerer E, Peters V, Schmidt-Mader B, Schemmer P, Herfarth C, Klar E. Intravenous glycine after cecal ligation and puncture has no effect on impaired hepatic microperfusion, leukocyte adhesion, and mortality in septic rats. Microvasc Res 2005; 69:71-8. [PMID: 15797263 DOI: 10.1016/j.mvr.2005.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 09/01/2004] [Indexed: 01/13/2023]
Abstract
Recent studies indicated that prefeeding of a glycine supplemented diet reduces the hepatic inflammatory response and liver damage in sepsis. We investigated the effect of a glycine-enriched infusion on hepatic microcirculatory disturbances and mortality in a rat model of sepsis after the onset of the disease. Male Wistar rats (240 +/- 13 g) underwent cecal ligation and puncture (CLP) or laparotomy (LAP). A glycine (CLP + Gly, n = 24), valine (CLP + Val, n = 24), or sodium chlorid (CLP + Sc, n = 24) infusion was started 2 h after CLP. The LAP group received sodium chloride intravenously (LAP + Sc, n = 18 ). Five hours, 10 h, and 20 h after CLP or LAP intravital microscopy (IVM) was performed to investigate leukocyte-endothelial interaction (LEI) and mean erythrocyte velocity in liver sinusoids (sMEV) and postsinosoidal venules (vMEV). The portal blood flow (PBF), hepatic enzyme liberation, and glycine values in blood were measured. Immunohistochemical staining for ICAM-1 in liver tissue was performed and survival was observed. Glycine values were significantly elevated in the CLP + Gly vs. the CLP + Val and the CLP + Sc group at every timepoint of investigation. Glycine infusion had no beneficial effects on sMEV, vMEV, LEI, hepatic enzyme liberation, and survival. Heart rate and mean arterial pressure remained stable but PBF decreased significantly in all groups 20 h after CLP. Although glycine reduces the hepatic inflammatory response and liver damage in pretreatment of septic rats, there was no effect of intravenous glycine after the onset of sepsis in our experiments. Our animal model does not support the use of glycine in patients.
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Affiliation(s)
- R S Croner
- Department of Surgery, University of Erlangen, Germany.
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Abstract
Given its specific thermal characteristics, the sesquioxide crystal Lu(2)O(3) is a particularly promising laser host material. We demonstrate mode locking of a Yb:Lu(2)O(3) laser by use of a semiconductor saturable-absorber mirror. The laser emits up to 470 mW in the picosecond regime, corresponding to a pump efficiency as high as 32%. With dispersion compensation, pulses as short as 220 fs at an average power of 266 mW are obtained at 1033.5 nm. To our knowledge, this is the first demonstration of a femtosecond oscillator based on Yb:Lu(2)O(3).
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Abstract
Congenital disorders of glycosylation (CDG) represent a family of genetic diseases with broad clinical presentation. Initial diagnosis is currently mainly based on the identification of hyposialylated serum transferrin (TF) by isoelectric focusing (IEF). To improve the diagnosis of known CDG types and to identify so far unknown CDG cases, additional glycoproteins, alpha1-antitrypsin titrypsin (alpha1-AT) and alpha1-antichymotrypsin (alpha1-ACT), were studied. According to the patterns of transferrin, enzyme assays and mutation analysis, 16 patients with various clinical symptoms suspicious for CDG were divided into three groups: group A (n = 6) with confirmed CDG; group B (n = 4) with clear abnormal TF-IEF patterns of unknown origin (all known CDG types were excluded) and group C (n = 6) with borderline TF-IEF patterns; 164 samples served as a control group. Automated IEF of TF, alpha1-AT and alpha1-ACT was carried out using a PhastSystem. CDG patients with glycosylation defects of known origin (group A) and patients with abnormal TF-IEF patterns due to glycosylation defects of as yet unknown origin (group B) showed abnormal IEF patterns of all three glycoproteins. These results confirmed generalized defects of glycosylation. Furthermore, the IEF pattern of alpha1-ACT seems to allow a differentiation between CDG Ia and CDG Ic. However, patients with borderline TF-IEF pattern (group C) showed a normal alpha1-AT-IEF pattern. Four of these six patients also showed a normal alpha1-ACT-IEF pattern; this constellation suggests that CDG can most likely be excluded. In the two remaining patients of group C with a borderline TF-IEF pattern an abnormal pattern of alpha1-ACT-IEF was obtained which needs further investigations. We conclude that the combined investigation of three glycoproteins provides additional information in the diagnostic work-up of patients with possible CDG. The suspicion of CDG in patients with apparent glycosylation defects of unknown origin or borderline TF-IEF pattern can be either substantiated or weakened.
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Affiliation(s)
- J Fang
- Universitäts-Kinderklinik, Sektion für Metabolische und Endokrinologische Erkrankungen, Heidelberg, Germany
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Lukacs Z, Keil A, Peters V, Kohlschütter A, Hoffmann GF, Cantz M, Kopitz J. Towards quality assurance in the determination of lysosomal enzymes: a two-centre study. J Inherit Metab Dis 2003; 26:571-81. [PMID: 14605503 DOI: 10.1023/a:1025904132569] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The definitive diagnosis of lysosomal storage disorders depends on the determination of enzymatic activities in cells, tissues or body fluids. At present, neither an evaluation of the different methods nor an interlaboratory quality assurance scheme is available. We have therefore determined the activities of total hexosaminidase, hexosaminidase A and beta-galactosidase in the same samples (n = 15) at two metabolic centres in Germany. Three different enzymatic methods were employed, two of which were based on leukocytes as enzyme source and one on dried blood spots. The results obtained by the two different methods using leukocytes proved comparable. In contrast, assays with dried blood spots showed poor correlation with results from leukocytes, possibly because enzymatic activity in dried blood is mainly derived from soluble plasma proteins. Nevertheless, accurate detection of a true enzyme deficiency was also possible in dried blood spots. All enzymes were highly stable when mailed frozen (recovery 98-120%). Enzymatic activities in dried blood samples were also stable at room temperature and were not affected even by exposure to elevated temperatures (50 degrees C for 3 h). Dried blood seems to be especially well suited for mailing from distant healthcare facilities, although more accurate results can be expected from leukocytes. In summary, comparability and pitfalls within a lysosomal quality assurance programme were evaluated.
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Affiliation(s)
- Z Lukacs
- Department of Pediatrics, Metabolic Laboratory, University Hospital Hamburg, Hamburg, Germany
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Bubel S, Peters V, Klein C, Hackler R, Schaefer JR, Hagenah J, Hoffmann GF, Vieregge P. [CDG (congenital disorders of glycosylation). Differential hereditary ataxia in adulthood diagnosis]. Nervenarzt 2002; 73:754-60. [PMID: 12242963 DOI: 10.1007/s00115-002-1351-y] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Congenital disorders of glycosylation (CDG) are a group of hereditary multisystem diseases due to different defects of enzymes or transport molecules involved in the synthesis of glycoproteins. CDG-la is the most common subtype, with cerebellar ataxia as the main neurological symptom. Currently there is little information about CDG-la manifestation in adulthood. Here we present two sisters in whom the diagnosis of CDG-la was made in the fourth decade of life and who to our knowledge are the oldest known patients with the disorder in Germany. The clinical course of the disease was typical, although less severe than previously described. The carbohydrate-deficient transferrin (CDT) level was increased but lower than in other CDG patients. Isoelectric focusing of transferrin revealed changes typical of CDG, whereas those of alpha 1-antitrypsin were only moderately pathologic. This might be due to the milder manifestation of the disease in our patients or it could be indicative of a stabilization of the disease after puberty. The CDG should be included in the differential diagnostic workup of hereditary cerebellar ataxia in adults.
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Affiliation(s)
- S Bubel
- Klinik für Neurologie, Universitätsklinikum Lübeck, Ratzeburger Allee 160, 23538 Lübeck
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Prietsch V, Peters V, Hackler R, Jakobi R, Assmann B, Fang J, Körner C, Helwig-Rolig A, Schaefer JR, Hoffmann GF. A new case of CDG-x with stereotyped dystonic hand movements and optic atrophy. J Inherit Metab Dis 2002; 25:126-30. [PMID: 12118527 DOI: 10.1023/a:1015628810892] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We report the clinical findings and the diagnostic work-up of a 17-month-old girl with CDG-x. Predominant clinical signs were, besides psychomotor retardation and truncal hypotonia, stereotyped dystonic hand movements and ophthalmological abnormalities such as optic atrophy, nystagmus and strabismus. Other symptoms that are often found in patients with CDG were not present, such as seizures, microcephaly, cerebellar hypoplasia, dysmorphic features, hepatointestinal disease, coagulopathy or multiorgan involvement. Isoelectric focusing (IEF) of the patient's serum showed a marked elevation of disialotransferrin, thus confirming an IEF type 1 pattern. A generalized glycosylation defect was confirmed also by IEF of a further glycoprotein (alpha1-antitrypsin), an increased carbohydrate deficient transferrin (CDT) serum concentration and an increased CDT/transferrin ratio. All known types of CDG-I, secondary glycosylation abnormalities and variants of amino acid sequence were excluded.
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Affiliation(s)
- V Prietsch
- Universitäts-Kinderklinik, Sektion für Metabolische und Endokrinologische Erkrankungen, Heidelberg, Germany.
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Peters V, Penzien JM, Reiter G, Körner C, Hackler R, Assmann B, Fang J, Schaefer JR, Hoffmann GF, Heidemann PH. Congenital disorder of glycosylation IId (CDG-IId) -- a new entity: clinical presentation with Dandy-Walker malformation and myopathy. Neuropediatrics 2002; 33:27-32. [PMID: 11930273 DOI: 10.1055/s-2002-23597] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A 1.5-year-old boy with macrocephaly due to a Dandy-Walker malformation presented with progressive hydrocephalus, extensive muscular hypotonia, transient cholestatic syndrome, extensive coagulation abnormalities and elevated creatine kinase indicating myopathy. Diagnostic work-up indicated a congenital disorder of glycosylation (CDG, formerly carbohydrate deficient glycoprotein syndrome). The serum transferrin pattern obtained by automated isoelectric focusing (IEF) showed an hitherto unreported pattern with strongly elevated tri-, di-, mono- and asialotransferrin bands, increasing in this order together with markedly decreased tetrasialotransferrin. Investigation of two additional glycoproteins, alpha(1)-antitrypsin and alpha(1)-antichymotrypsin, confirmed a generalised defect of glycosylation. All known glycosylation defects could be ruled out by enzymatic analyses in either leukocytes or fibroblasts or by the results obtained by IEF. SDS-electrophoresis demonstrated a marked difference in the molecular weight of transferrin, suggesting the lack of parts or of all oligosaccharide chains. The defect could be delineated to a deficiency of beta-1,4-galactosyltransferase (E.C.2.4.1.38) due to a homozygous insertion (1031 - 1032 insC). Details of the biochemical and molecular findings will be described elsewhere.
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Affiliation(s)
- V Peters
- Universitäts-Kinderklinik, Sektion für Metabolische und Endokrinologische Erkrankungen, Heidelberg, Germany.
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Assmann B, Hackler R, Peters V, Schaefer JR, Arndt T, Mayatepek E, Jaeken J, Hoffmann GF. A new subtype of a congenital disorder of glycosylation (CDG) with mild clinical manifestations. Neuropediatrics 2001; 32:313-8. [PMID: 11870587 DOI: 10.1055/s-2001-20407] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A boy with an unspecific symptomatology consisting of mental retardation, strabismus, hypotonia and mild ataxia was diagnosed with a congenital disorder of glycosylation (CDG). Neither cerebellar atrophy nor dysmorphic features were present. The serum transferrin band pattern obtained by isoelectric focusing(IEF) showed a strongly elevated disialotransferrin band together with only slightly elevated asialotransferrin, thus a type I pattern. This is a new CDG classified CDG-x since CDG-la, -b, -c, -d and -e were excluded. Quantitative differences to the type 1 pattern of a CDG-la patient with a moderate to severe course were confirmed by densitometric evaluation of the gels and by SDS gel electrophoresis. Liver biopsy showed lysosomal inclusions suggesting a pre-Golgi defect. This patient's case supports the approach to include isoelectric focusing of serum transferrin in the diagnostic work-up of patients with unexplained symptoms.
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Affiliation(s)
- B Assmann
- University Children's Hospital, Division of Metabolic and Endocrine Diseases, Heidelberg, Germany.
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Affiliation(s)
- V Peters
- State of CO-Department of Law, Natural Resources Section, 1525 Sherman Street, 5th Floor, Denver, Colorado 80203, USA
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Dominguez K, Bertolli J, Fowler M, Peters V, Ortiz I, Melville S, Rakusan T, Frederick T, Hsu H, D'Almada P, Maldonado Y, Wilfert C. Lack of definitive severe mitochondrial signs and symptoms among deceased HIV-uninfected and HIV-indeterminate children < or = 5 years of age, Pediatric Spectrum of HIV Disease project (PSD), USA. Ann N Y Acad Sci 2000; 918:236-46. [PMID: 11131710 DOI: 10.1111/j.1749-6632.2000.tb05493.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND In response to recent reports of mitochondrial dysfunction in HIV-uninfected infants exposed to antiretroviral (ARV) prophylaxis, the Perinatal Safety Review Working Group reviewed deaths in five large HIV-exposed perinatal cohorts in the United States to determine if similar cases of severe mitochondrial toxicity could be detected. We describe the results of this review for the PSD cohort. METHODS Hospitalization, clinic and death records for deceased HIV-uninfected and HIV-indeterminate children who were less than 5 years of age were reviewed. Standard definitions were used to classify HIV infection status and the likelihood that signs and symptoms were related to mitochondrial dysfunction. Children were classified as having signs and symptoms that were considered (1) unrelated, (2) unlikely, (3) consistent with, or (4) likely related to mitochondrial disease. SIDS deaths were put into a separate category. RESULTS 8,465 of 13,125 HIV-exposed children were either HIV-uninfected or HIV-indeterminate. Among the 84 deaths in the subgroup of 8,465 children, 9 were considered in Class 2 (unlikely), 4 were considered in Class 3 (consistent with), and none were considered in Class 4 (likely). 97% of those children who received ARV prophylaxis received zidovudine alone. None of the HIV-uninfected deaths were classified in 2, 3, or 4; and only one of these was exposed to ARV prophylaxis. Among the 3 HIV-indeterminate children who were classified in 3 (consistent with), 2 had no or unknown ARV exposure before 1994 when use of ZDV prophylaxis became the standard of care. Both HIV-uninfected and HIV-indeterminate children with ARV exposure or unknown exposure had lower mortality rates than children without ARV exposure. CONCLUSION Monoprophylaxis with ZDV was not associated with higher death rates in the cohort of 8,465 children or with any findings likely consistent with mitochondrial dysfunction among the 85 deaths. Ongoing monitoring of drug safety in large multi-site prospective cohort studies of HIV-exposed children is essential in the era of highly active antiretroviral therapy.
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Affiliation(s)
- K Dominguez
- Epidemiology Branch, Division of HIV/AIDS Prevention, National Center for HIV/STD/TB Prevention, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
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Brown J, Peters V. Improved hepatitis B vaccination rates in ESRD patients in California. Adv Ren Replace Ther 2000; 7:S95-9. [PMID: 11053594] [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] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
According to the Centers for Disease Control (CDC) Survey of Dialysis Associated Diseases, California, which includes Network 17 and 18, had one of the lowest hepatitis B vaccination rates in the country for 1994, 1995, and 1996. With 3 outbreaks of hepatitis B (HBV) in California in 1994, hepatitis B vaccination was chosen as a quality improvement project in both Network 17 and 18. With input from both Medical Review Boards and HCFA Region X, a project was formulated which focused on the improvement of the number of facilities which had hepatitis B vaccination rates which are greater than 50%. The overall purpose of both projects was to: (1) achieve access to preventative services for end-stage renal disease (ESRD) Medicare beneficiaries; (2) increase the number of ESRD patients in California who are vaccinated for HBV; (3) eliminate dialysis in California as an independent risk factor for contracting HBV; (4) decrease the number of ESRD facilities with HBV vaccination rates of 0%; and (5) increase the number of ESRD facilities with HBV vaccination rates greater than 50%. In 1998, both Network 17 and 18 denominators were adjusted to reflect the population which is eligible for vaccination. Because of historically low vaccination rate in California, the 1998 data collection sought to ascertain precise numbers for the ESRD patient population. Data were used from the 1996 and 1997 CDC Survey of Dialysis Associated Diseases from baseline measurements of HBV vaccination rates for all facilities in both Network 17 and 18. The CDC did not conduct a survey in 1998, however, Network 17 and 18 conducted a survey of dialysis associated diseases for all of California ESRD facilities. A data collection tool was designed to gather information on processes and outcomes in each facility. This allowed a continuous quality improvement (CQI)-based approach to analyze the problem, where tools like cause/effect and Pareto diagrams provided information on factors and issues affecting low HBV vaccination rates. Interventions were designed to target those specific factors. Interventions included creation of the "Hepatitis Booklet" (Network 18) and the "Hepatitis Resource Guide" (Network 17); mailing of the resource material to all providers (Network 18), and with vaccination rates less than 50% (Network 17); development of facility specific profiles; and policy statements by both Medical Review Boards on Hepatitis B Vaccination. The number of ESRD patients in California who are vaccinated for HBV increased to 53% or 11,412 patients of 21,617 eligible patients in both Networks. The number of ESRD patients in California who are vaccinated plus those in the process of receiving the series brought the California vaccination rate of 72% or 15,653 for 21,617 eligible patients in both Networks. The number of ESRD facilities in California with HBV vaccination rates of 0% decreased to 10 facilities in 1998, from 75 facilities in 1997, and 135 facilities in 1996. The number of ESRD facilities in California with HBV vaccination rates more than 50% increased to 175 facilities, from 87 facilities in 1997, and 52 in 1996. The number of patients developing antibodies post-vaccine was 62% (Network 18). Facilities in Network 17 with vaccination rates exceeding 50% who did not receive the Hepatitis B Resource Guide vaccinated 44% of all patients vaccinated or in progress in Network 17 in 1998. Facilities in Network 17 with vaccination rates less than 50% who did receive the Hepatitis B Resource Guide vaccinated 57% of all patients vaccinated or in progress in Network 17. For the first time, vaccination rates were collected on peritoneal dialysis (PD) patients. In Network 17, 51% of PD patients are vaccinated versus 59% of hemodialysis patients. In Network 18, 48% of PD patients are vaccinated versus 48% of hemodialysis patients. Resource material and feedback reports developed by both Networks facilitated improvements in Hepatitis B vaccination of ESRD patients in Ca
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Affiliation(s)
- J Brown
- TransPacific Renal Network, San Rafael, CA 94903, USA
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Assmann B, Hackler R, Peters V, Schaefer JR, Hoffmann GF. Increased carbohydrate-deficient transferrin concentration and abnormal protein glycosylation of unknown etiology in a patient with achondroplasia. Clin Chem 2000; 46:584-6. [PMID: 10759489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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Steele A, Goddard DT, Stapleton D, Toporski JK, Peters V, Bassinger V, Sharples G, Wynn-Williams DD, McKay DS. Investigations into an unknown organism on the martian meteorite Allan Hills 84001. Meteorit Planet Sci 2000; 35:237-241. [PMID: 11542972 DOI: 10.1111/j.1945-5100.2000.tb01772.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Examination of fracture surfaces near the fusion crust of the martian meteorite Allan Hills (ALH) 84001 have been conducted using scanning electron microscopy (SEM) and atomic force microscopy (AFM) and has revealed structures strongly resembling mycelium. These structures were compared with similar structures found in Antarctic cryptoendolithic communities. On morphology alone, we conclude that these features are not only terrestrial in origin but probably belong to a member of the Actinomycetales, which we consider was introduced during the Antarctic residency of this meteorite. If true, this is the first documented account of terrestrial microbial activity within a meteorite from the Antarctic blue ice fields. These structures, however, do not bear any resemblance to those postulated to be martian biota, although they are a probable source of the organic contaminants previously reported in this meteorite.
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Affiliation(s)
- A Steele
- Astrobiology Group, University of Portsmouth, UK
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Tsibouklis J, Stone M, Thorpe AA, Graham P, Peters V, Heerlien R, Smith JR, Green KL, Nevell TG. Preventing bacterial adhesion onto surfaces: the low-surface-energy approach. Biomaterials 1999; 20:1229-35. [PMID: 10395392 DOI: 10.1016/s0142-9612(99)00023-x] [Citation(s) in RCA: 115] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Good-quality coatings prepared from poly(methylpropenoxyfluoroalkylsiloxane)s or poly(perfluoroacrylate)s are capable of inhibiting the bacterial colonisation of surfaces.
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Affiliation(s)
- J Tsibouklis
- Drug Delivery Research Group, School of Pharmacy and Biomedical Sciences, University of Portsmouth, UK
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Peters V, Janssen P, Conrad R. Efficiency of hydrogen utilization during unitrophic and mixotrophic growth of Acetobacterium woodii on hydrogen and lactate in the chemostat. FEMS Microbiol Ecol 1998. [DOI: 10.1111/j.1574-6941.1998.tb00516.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Schlesinger M, Peters V, Jiang JD, Roboz JP, Bekesi JG. Increased expression of activation markers on CD8 lymphocytes in children with human immunodeficiency virus-1 infection. Pediatr Res 1995; 38:390-6. [PMID: 7494665 DOI: 10.1203/00006450-199509000-00020] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [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] [Indexed: 01/25/2023]
Abstract
The aims of the present study were to analyze the impact of perinatal human immunodeficiency virus (HIV)-1 infection on lymphocyte maturation in children, to determine the expression of activation markers on CD8+ cells, and to define predictors of survival in HIV-infected children. Seventy-one children presenting HIV-related symptoms were included in the study; 29 were less than 2 y old and 42 were 2 to 12 y of age. Results were compared with those obtained in normal children of a similar age. In HIV-infected children the proportion of CD4+ and CD8+CD45RA+ cells was significantly decreased, whereas that of CD8+, CD8+CD38+, and CD8+CD45RO+ cells was strikingly increased compared with controls. In children less than 2 y old the absolute number of CD4+ and CD8+CD45RA+ cells decreased, and the number of CD8+CD45RO+ cells increased significantly, whereas the number of CD8+ and CD8+CD38+ cells did not change. The absolute number of CD4+ T cells declined with age both among controls and among HIV-infected children. In contrast, the absolute number of CD8+ cells and CD8 subsets decreased with age only in controls but not in infected children. In HIV-1-infected children the expression of the CD38 and CD45RO markers on CD8+ cells was significantly correlated, indicating that these were activated cells. The survival of less than 2-y-old children with AIDS symptoms was positively correlated with the total number of CD8 cells and CD8+CD38+ cells at time of entry into the study.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Schlesinger
- Ruttenberg Cancer Center, T. J. Martell Laboratory for Leukemia, Cancer and AIDS Research, Mount Sinai School of Medicine, New York, New York 10029, USA
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Abstract
Mimicry of human antigen by HIV may underlie the autoreactivity seen in AIDS. A mouse monoclonal antibody (VIC8) raised against HIV p24 cross-reacted with human platelets; binding could be abolished by recombinant p24 antigen. VIC8 bound less well to platelets from patients with HIV than to those from healthy individuals. In the HIV group, binding was not related to p24 antigenaemia, disease stage, or platelet counts. This cross-reactivity is another example of antigenic mimicry by HIV and may be mechanistically important in HIV-associated autoimmune-like thrombocytopenia.
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Affiliation(s)
- A W Hohmann
- Department of Clinical Immunology, Flinders Medical Centre, Bedford Park, Australia
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Molzahn A, Kostro BJ, Spalding L, Schira M, Welch J, Hossli SM, Peters V. Research series: Part 4 of 6. Annotated bibliography: instrument references, instrumentation, reliability and validity. ANNA J 1993; 20:463-7. [PMID: 8368880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Abstract
Two mouse monoclonal antibodies (VIC5 and VIC6; referred to as Ab1) reacting with the p24 core antigen of HIV-1 were used to produce mouse monoclonal anti-idiotypic antibodies (Ab2). Six anti-idiotypic antibodies were characterized. The five anti-idiotypic antibodies directed against VIC6 partly competed which each other and thus defined a set of overlapping idiotypes on Ab1. All 6 Ab2s inhibited the binding of the corresponding anti-p24 antibody to antigen, although four (W1, Y16, Y6, X14) were markedly more inhibitory than the remaining two (G6, Y11). All six Ab2s were antigen-inhibitable; however the interaction of G6 and Y11 with Ab1 was blocked with considerably less soluble p24 antigen than the remaining four. Correspondingly, G6 and Y11 had lower affinities for Ab1 than did W1, Y6 and X14; the affinity index of Y16 was equivalent to that of Y11. None of the Ab2s reacted with H or L chains of Ab1 after reduction on SDS-gels. Similarly, both Ab1s failed to react with the H or L chains of Ab2. These criteria appeared to define at least four of these Ab2s as internal image antibodies whose image is composed of both H and L chains. The anti-idiotypic antibodies were injected either individually or as a combined preparation of all 6 into syngeneic mice and Porton rats. Despite the presence of anti-anti-idiotypic antibodies (Ab3) in these animals, when used individually no antigen-specific antibodies were found. A small response to p24 antigen was induced in 3 of 6 mice using preparations containing all 6 anti-idiotypes.
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Affiliation(s)
- A Hohmann
- Department of Clinical Immunology, Flinders Medical Centre, Bedford Park, Australia
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Peters V, Rubin L, Gloster ES, Aprin H. Foreign-body osteitis of the metacarpal bone. Clin Orthop Relat Res 1992:69-72. [PMID: 1563172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Foreign-body granulomas in the hand can appear secondary to an unrecognized foreign material. In a six-year-old boy, an extensive sterile osteitis of the second metacarpal bone appeared adjacent to a wood splinter.
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Affiliation(s)
- V Peters
- Department of Pediatric Infections Disease, Schneider Children's Hospital, Long Island Jewish Medical Center, Hyde Park, New York
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Hartshorne MF, Peters V. Nuclear medicine applications for the diabetic foot. Clin Podiatr Med Surg 1987; 4:361-75. [PMID: 2952246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Although no frequently described in the podiatric literature, nuclear medicine imaging may be of great assistance to the clinical podiatrist. This report reviews in detail the use of modern nuclear medicine approaches to the diagnosis and management of the diabetic foot. Nuclear medicine techniques are helpful in evaluating possible osteomyelitis, in determining appropriate amputation levels, and in predicting response to conservative ulcer management. Specific indications for bone, gallium, and perfusion imaging are described.
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Ramirez H, Bennett WF, Peters V. CT diagnosis of hernia through iliac bone-graft donor site. J Comput Assist Tomogr 1985; 9:411-2. [PMID: 3973180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Peters V. Simplifying diet plans for the adult limited learner. Diabetes Educ 1982; 7:35-6. [PMID: 6915843 DOI: 10.1177/014572178200700408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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