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Smits J, Cunha D, Qu J, Latta L, Szentmary N, Seitz B, Roux L, Aberdam D, van Heeringen S, Zhou H. 553 Multi-omics analysis identifies coordination and hierarchy of transcription factors controlling specific epithelial cell fates in corneal epithelium. J Invest Dermatol 2022. [DOI: 10.1016/j.jid.2022.09.569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Korenblik R, van Zon JFJA, Olij B, Heil J, Dewulf MJL, Neumann UP, Olde Damink SWM, Binkert CA, Schadde E, van der Leij C, van Dam RM, van Baardewijk LJ, Barbier L, Binkert CA, Billingsley K, Björnsson B, Andorrà EC, Arslan B, Baclija I, Bemelmans MHA, Bent C, de Boer MT, Bokkers RPH, de Boo DW, Breen D, Breitenstein S, Bruners P, Cappelli A, Carling U, Robert MCI, Chan B, De Cobelli F, Choi J, Crawford M, Croagh D, van Dam RM, Deprez F, Detry O, Dewulf MJL, Díaz-Nieto R, Dili A, Erdmann JI, Font JC, Davis R, Delle M, Fernando R, Fisher O, Fouraschen SMG, Fretland ÅA, Fundora Y, Gelabert A, Gerard L, Gobardhan P, Gómez F, Guiliante F, Grünberger T, Grochola LF, Grünhagen DJ, Guitart J, Hagendoorn J, Heil J, Heise D, Herrero E, Hess G, Hilal MA, Hoffmann M, Iezzi R, Imani F, Inmutto N, James S, Borobia FJG, Jovine E, Kalil J, Kingham P, Kollmar O, Kleeff J, van der Leij C, Lopez-Ben S, Macdonald A, Meijerink M, Korenblik R, Lapisatepun W, Leclercq WKG, Lindsay R, Lucidi V, Madoff DC, Martel G, Mehrzad H, Menon K, Metrakos P, Modi S, Moelker A, Montanari N, Moragues JS, Navinés-López J, Neumann UP, Nguyen J, Peddu P, Primrose JN, Olde Damink SWM, Qu X, Raptis DA, Ratti F, Ryan S, Ridouani F, Rinkes IHMB, Rogan C, Ronellenfitsch U, Serenari M, Salik A, Sallemi C, Sandström P, Martin ES, Sarría L, Schadde E, Serrablo A, Settmacher U, Smits J, Smits MLJ, Snitzbauer A, Soonawalla Z, Sparrelid E, Spuentrup E, Stavrou GA, Sutcliffe R, Tancredi I, Tasse JC, Teichgräber U, Udupa V, Valenti DA, Vass D, Vogl TJ, Wang X, White S, De Wispelaere JF, Wohlgemuth WA, Yu D, Zijlstra IJAJ. Resectability of bilobar liver tumours after simultaneous portal and hepatic vein embolization versus portal vein embolization alone: meta-analysis. BJS Open 2022; 6:6844022. [PMID: 36437731 PMCID: PMC9702575 DOI: 10.1093/bjsopen/zrac141] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/09/2022] [Accepted: 10/05/2022] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Many patients with bi-lobar liver tumours are not eligible for liver resection due to an insufficient future liver remnant (FLR). To reduce the risk of posthepatectomy liver failure and the primary cause of death, regenerative procedures intent to increase the FLR before surgery. The aim of this systematic review is to provide an overview of the available literature and outcomes on the effectiveness of simultaneous portal and hepatic vein embolization (PVE/HVE) versus portal vein embolization (PVE) alone. METHODS A systematic literature search was conducted in PubMed, Web of Science, and Embase up to September 2022. The primary outcome was resectability and the secondary outcome was the FLR volume increase. RESULTS Eight studies comparing PVE/HVE with PVE and six retrospective PVE/HVE case series were included. Pooled resectability within the comparative studies was 75 per cent in the PVE group (n = 252) versus 87 per cent in the PVE/HVE group (n = 166, OR 1.92 (95% c.i., 1.13-3.25)) favouring PVE/HVE (P = 0.015). After PVE, FLR hypertrophy between 12 per cent and 48 per cent (after a median of 21-30 days) was observed, whereas growth between 36 per cent and 67 per cent was reported after PVE/HVE (after a median of 17-31 days). In the comparative studies, 90-day primary cause of death was similar between groups (2.5 per cent after PVE versus 2.2 per cent after PVE/HVE), but a higher 90-day primary cause of death was reported in single-arm PVE/HVE cohort studies (6.9 per cent, 12 of 175 patients). CONCLUSION Based on moderate/weak evidence, PVE/HVE seems to increase resectability of bi-lobar liver tumours with a comparable safety profile. Additionally, PVE/HVE resulted in faster and more pronounced hypertrophy compared with PVE alone.
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Affiliation(s)
- Remon Korenblik
- Correspondence to: R. K., Universiteigssingel 50 (room 5.452) 6229 ER Maastricht, The Netherlands (e-mail: ); R. M. v. D., Maastricht UMC+, Dept. of Surgery, Level 4, PO Box 5800, 6202 AZ Maastricht, The Netherlands (e-mail: )
| | - Jasper F J A van Zon
- Department of Surgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Bram Olij
- Department of Surgery, Maastricht University Medical Center, Maastricht, The Netherlands,GROW—Department of Surgery, School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands,Department of General, Visceral and Transplant Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Jan Heil
- Department of General, Visceral and Transplant Surgery, University Hospital Frankfurt, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Maxime J L Dewulf
- Department of Surgery, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Ulf P Neumann
- Department of Surgery, Maastricht University Medical Center, Maastricht, The Netherlands,Department of General, Visceral and Transplant Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Steven W M Olde Damink
- Department of Surgery, Maastricht University Medical Center, Maastricht, The Netherlands,Department of General, Visceral and Transplant Surgery, University Hospital RWTH Aachen, Aachen, Germany,NUTRIM—Department of Surgery, School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, The Netherlands
| | - Christoph A Binkert
- Department of Radiology, Cantonal Hospital Winterthur, Winterthur, Switzerland
| | - Erik Schadde
- Department of General, Visceral and Transplant Surgery, Klinik Hirslanden, Zurich, Switzerland,Department of General, Visceral and Transplant Surgery, Hirslanden Klink St. Anna Luzern, Luzern, Switzerland
| | | | - Ronald M van Dam
- Correspondence to: R. K., Universiteigssingel 50 (room 5.452) 6229 ER Maastricht, The Netherlands (e-mail: ); R. M. v. D., Maastricht UMC+, Dept. of Surgery, Level 4, PO Box 5800, 6202 AZ Maastricht, The Netherlands (e-mail: )
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van Beeck Calkoen EA, Pennings RJE, Smits J, Pegge S, Rotteveel LJC, Merkus P, Verbist BM, Sanchez E, Hensen EF. Contralateral hearing loss in children with a unilateral enlarged vestibular aqueduct. Int J Pediatr Otorhinolaryngol 2021; 150:110891. [PMID: 34425354 DOI: 10.1016/j.ijporl.2021.110891] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 07/01/2021] [Accepted: 08/13/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVE To evaluate the long-term ipsi- and contralateral hearing of patients with a unilateral enlarged vestibular aqueduct (EVA). STUDY DESIGN Multicenter retrospective cohort study. SETTING Three tertiary otology and audiology referral centers. PATIENTS AND DIAGNOSTIC INTERVENTIONS A total of 34 children with a unilateral enlarged vestibular aqueduct as identified on CT and/or MR imaging were evaluated with pure tone and speech perception audiometry. MEAN OUTCOME MEASURES Radiologic measurements of the vestibular aqueduct, ipsi- and contralateral hearing loss, ipsi- and contralateral hearing loss progression over time and DNA test results. RESULTS All patients in this cohort with unilateral EVA presented with hearing loss. Hearing loss was progressive in 38% of the ipsilateral ears. In 29% of the children, hearing loss was also found in the contralateral ear without EVA. In 90%, the contralateral hearing was stable, with a mean follow up of 4.2 years. We found a significant correlation between the severity of the hearing loss and the size of the EVA. A genetic diagnosis associated with EVA and/or SNHL was found in only 7%. CONCLUSION About a third of the children with unilateral EVA are at risk of developing hearing loss in the contralateral ear. This indicates that at least in some patients with a unilateral EVA, a bilateral pathogenic process underlies the hearing loss, in contrary to what the imaging results suggest. These findings are important for counseling of EVA patients and their parents and have implications for follow up.
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Affiliation(s)
- E A van Beeck Calkoen
- Department of Otolaryngology-Head and Neck Surgery Ear & Hearing, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands; Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Center for Diagnostics in Sensorineural Hearing Loss (CDS), VU University Medical Center, Amsterdam, the Netherlands.
| | - R J E Pennings
- Department of Otolaryngology-Head and Neck Surgery, Section Hearing and Genes, Radboud University Medical Center, Nijmegen, the Netherlands; Donders Institute for Brain Cognition and Behavior, Radboud University Medical Center, Nijmegen, the Netherlands
| | - J Smits
- Department of Otolaryngology-Head and Neck Surgery, Section Hearing and Genes, Radboud University Medical Center, Nijmegen, the Netherlands; Donders Institute for Brain Cognition and Behavior, Radboud University Medical Center, Nijmegen, the Netherlands
| | - S Pegge
- Department of Radiology, Radboud University Center, Nijmegen, the Netherlands
| | - L J C Rotteveel
- Department of Otolaryngology-Head and Neck Surgery, Leiden University Medical Center, Leiden, the Netherlands
| | - P Merkus
- Department of Otolaryngology-Head and Neck Surgery Ear & Hearing, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, the Netherlands; Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Center for Diagnostics in Sensorineural Hearing Loss (CDS), VU University Medical Center, Amsterdam, the Netherlands
| | - B M Verbist
- Department of Radiology, Leiden University Medical Center, Leiden, the Netherlands
| | - E Sanchez
- Department of Radiology, VU University Medical Center, Amsterdam, the Netherlands
| | - E F Hensen
- Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Department of Otolaryngology-Head and Neck Surgery, Leiden University Medical Center, Leiden, the Netherlands
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Banse HE, Getachew F, Levy M, Smits J. Influence of season and pituitary pars intermedia dysfunction on hair cortisol concentration in horses. Domest Anim Endocrinol 2020; 72:106375. [PMID: 31431311 DOI: 10.1016/j.domaniend.2019.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 06/21/2019] [Accepted: 07/09/2019] [Indexed: 01/09/2023]
Abstract
Hair cortisol has been demonstrated to reflect hypothalamic-pituitary-adrenal axis activity (including Cushing's disease and stress) in several species. We hypothesized that hair cortisol concentrations are increased in horses with pituitary pars intermedia dysfunction (PPID) compared with healthy adult horses and that this difference is magnified in the fall, when circulating adrenocorticotropin (ACTH) is generally the highest. Cortisol from hair collected using clippers with a #40 blade from the neck was compared between PPID horses and control horses over several months in the fall (August-December) and 1 mo in spring (May). Cortisol from hair at several sampling sites (neck, jugular furrow, sternum, and submandibular) were compared between PPID (n = 6) and control (n = 8) horses in May. Relationships between hair cortisol and ACTH were assessed in the fall. Hair cortisol when measured by weight was higher in PPID vs control horses in October and November (P ≤ 0.01) but not December (P = 0.15), May (P > 0.7), or August-September (P = 0.18). When normalized for hair length, hair cortisol was higher in PPID vs control horses in November (P = 0.0006), but not October or December (P ≥ 0.06). Hair cortisol concentrations did not differ between PPID and control horses from any collection site in May (P > 0.7). There were no consistent relationships between ACTH and hair cortisol concentrations in October, November, or December (P ≥ 0.05). These findings suggest that PPID horses have increased hair cortisol accumulation in the fall compared with control horses. Additional work is needed to clarify whether assessing cortisol per weight or per hair length is most relevant in the horse.
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Affiliation(s)
- H E Banse
- Department of Veterinary Clinical Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
| | - F Getachew
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z1, Canada
| | - M Levy
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z1, Canada
| | - J Smits
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4Z1, Canada
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Smits J, Mosk AP, van der Straten P. Imaging trapped quantum gases by off-axis holography. Opt Lett 2020; 45:981-984. [PMID: 32058523 DOI: 10.1364/ol.384120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
We present a dispersive imaging method for trapped quantum gases based on digital off-axis holography. Both phase delay and intensity of the probe field are determined from the same image. Due to the heterodyne gain inherent to the holographic method, it is possible to retrieve the phase delay induced by the atoms at probe beam doses two orders of magnitude lower than phase-contrast imaging methods. Using the full field of the probe beam, we numerically correct for image defocusing.
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Smits J, Ederveen T, Rikken G, van den Brink N, van Vlijmen-Willems I, Boekhorst J, Kamsteeg M, Schalkwijk J, van Hijum S, Zeeuwen P, van den Bogaard E. 214 TARgeting the cutaneous microbiota in atopic dermatitis by coal tar via AHR-dependent induction of antimicrobial peptides. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.07.215] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Smits J, Liao L, Stoof HTC, van der Straten P. Observation of a Space-Time Crystal in a Superfluid Quantum Gas. Phys Rev Lett 2018; 121:185301. [PMID: 30444377 DOI: 10.1103/physrevlett.121.185301] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Indexed: 06/09/2023]
Abstract
Time crystals are a phase of matter, for which the discrete time symmetry of the driving Hamiltonian is spontaneously broken. The breaking of discrete time symmetry has been observed in several experiments in driven spin systems. Here, we show the observation of a space-time crystal using ultracold atoms, where the periodic structure in both space and time is directly visible in the experimental images. The underlying physics in our superfluid can be described ab initio and allows for a clear identification of the mechanism that causes the spontaneous symmetry breaking. Our results pave the way for the usage of space-time crystals for the discovery of novel nonequilibrium phases of matter.
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Affiliation(s)
- J Smits
- Debye Institute for Nanomaterials Science and Center for Extreme Matter and Emergent Phenomena, Utrecht University, P.O. Box 80.000, 3508 TA Utrecht, Netherlands
| | - L Liao
- Institute for Theoretical Physics and Center for Extreme Matter and Emergent Phenomena, Utrecht University, P.O. Box 80.000, 3508 TA Utrecht, Netherlands
| | - H T C Stoof
- Institute for Theoretical Physics and Center for Extreme Matter and Emergent Phenomena, Utrecht University, P.O. Box 80.000, 3508 TA Utrecht, Netherlands
| | - P van der Straten
- Debye Institute for Nanomaterials Science and Center for Extreme Matter and Emergent Phenomena, Utrecht University, P.O. Box 80.000, 3508 TA Utrecht, Netherlands
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Ourak M, Smits J, Esteveny L, Borghesan G, Gijbels A, Schoevaerdts L, Douven Y, Scholtes J, Lankenau E, Eixmann T, Schulz-Hildebrandt H, Hüttmann G, Kozlovszky M, Kronreif G, Willekens K, Stalmans P, Faridpooya K, Cereda M, Giani A, Staurenghi G, Reynaerts D, Vander Poorten EB. Combined OCT distance and FBG force sensing cannulation needle for retinal vein cannulation: in vivo animal validation. Int J Comput Assist Radiol Surg 2018; 14:301-309. [PMID: 30056592 DOI: 10.1007/s11548-018-1829-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 07/18/2018] [Indexed: 11/29/2022]
Abstract
PURPOSE Retinal vein cannulation is an experimental procedure during which a clot-dissolving drug is injected into an obstructed retinal vein. However, due to the fragility and minute size of retinal veins, such procedure is considered too risky to perform manually. With the aid of surgical robots, key limiting factors such as: unwanted eye rotations, hand tremor and instrument immobilization can be tackled. However, local instrument anatomy distance and force estimation remain unresolved issues. A reliable, real-time local interaction estimation between instrument tip and the retina could be a solution. This paper reports on the development of a combined force and distance sensing cannulation needle, and its experimental validation during in vivo animal trials. METHODS Two prototypes are reported, relying on force and distance measurements based on FBG and OCT A-scan fibres, respectively. Both instruments provide an 80 [Formula: see text] needle tip and have outer shaft diameters of 0.6 and 2.3 mm, respectively. RESULTS Both prototypes were characterized and experimentally validated ex vivo. Then, paired with a previously developed surgical robot, in vivo experimental validation was performed. The first prototype successfully demonstrated the feasibility of using a combined force and distance sensing instrument in an in vivo setting. CONCLUSION The results demonstrate the feasibility of deploying a combined sensing instrument in an in vivo setting. The performed study provides a foundation for further work on real-time local modelling of the surgical scene. This paper provides initial insights; however, additional processing remains necessary.
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Affiliation(s)
- M Ourak
- University of Leuven, Leuven, Belgium.
| | - J Smits
- University of Leuven, Leuven, Belgium
| | | | | | - A Gijbels
- University of Leuven, Leuven, Belgium
| | | | - Y Douven
- Eindhoven University of Technology, Eindhoven, The Netherlands
| | - J Scholtes
- Eindhoven University of Technology, Eindhoven, The Netherlands
| | - E Lankenau
- OptoMedical Technologies GmbH, Lübeck, Germany
| | - T Eixmann
- Medical Laser Center Lübeck GmbH, Lübeck, Germany
| | | | - G Hüttmann
- Medical Laser Center Lübeck GmbH, Lübeck, Germany
| | - M Kozlovszky
- Austrian Center for Medical Innovation and Technology Gmbh, Neustadt, Austria
| | - G Kronreif
- Austrian Center for Medical Innovation and Technology Gmbh, Neustadt, Austria
| | - K Willekens
- University Hospitals Leuven, Leuven, Belgium
| | - P Stalmans
- University Hospitals Leuven, Leuven, Belgium
| | - K Faridpooya
- The Rotterdam Eye Hospital, Rotterdam, The Netherlands
| | - M Cereda
- The Eye Clinic, University of Milan, Milan, Italy
| | - A Giani
- The Eye Clinic, University of Milan, Milan, Italy
| | - G Staurenghi
- The Eye Clinic, University of Milan, Milan, Italy
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Smits J, Ederveen T, Schalkwijk J, van Hijum S, Zeeuwen P, van den Bogaard E. 966 The human cutaneous microbiome composition changes after coal tar treatment of both healthy and atopic dermatitis skin. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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van den Bogaard E, Rikken G, Smits J, Perdew G. 1075 From old king coal to novel therapeutics for inflammatory skin diseases: The aryl hydrocarbon Receptor as a therapeutic target. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.03.1088] [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: 10/17/2022]
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Stehlik J, Smits J, Jarcho J, Lehman R, Cherikh W, Mehra M. The Opioid Use Crisis and Organ Transplantation: A Comparison of the United States and Europe. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.458] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Smits J, Niehues H, Rikken G, van Vlijmen-Willems I, Zeeuwen P, Schalkwijk J, van den Bogaard E. 113 Immortalized N/TERT keratinocytes: An excellent and versatile alternative for primary keratinocytes in experimental dermatological research. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.07.423] [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: 10/18/2022]
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Kehayias P, Jarmola A, Mosavian N, Fescenko I, Benito FM, Laraoui A, Smits J, Bougas L, Budker D, Neumann A, Brueck SRJ, Acosta VM. Solution nuclear magnetic resonance spectroscopy on a nanostructured diamond chip. Nat Commun 2017; 8:188. [PMID: 28775280 PMCID: PMC5543112 DOI: 10.1038/s41467-017-00266-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 06/15/2017] [Indexed: 11/29/2022] Open
Abstract
Sensors using nitrogen-vacancy centers in diamond are a promising tool for small-volume nuclear magnetic resonance (NMR) spectroscopy, but the limited sensitivity remains a challenge. Here we show nearly two orders of magnitude improvement in concentration sensitivity over previous nitrogen-vacancy and picoliter NMR studies. We demonstrate NMR spectroscopy of picoliter-volume solutions using a nanostructured diamond chip with dense, high-aspect-ratio nanogratings, enhancing the surface area by 15 times. The nanograting sidewalls are doped with nitrogen-vacancies located a few nanometers from the diamond surface to detect the NMR spectrum of roughly 1 pl of fluid lying within adjacent nanograting grooves. We perform 1H and 19F nuclear magnetic resonance spectroscopy at room temperature in magnetic fields below 50 mT. Using a solution of CsF in glycerol, we determine that 4 ± 2 × 1012 19F spins in a 1 pl volume can be detected with a signal-to-noise ratio of 3 in 1 s of integration. Nitrogen vacancy (NV) centres in diamond can be used for NMR spectroscopy, but increased sensitivity is needed to avoid long measurement times. Kehayias et al. present a nanostructured diamond grating with a high density of NV centres, enabling NMR spectroscopy of picoliter-volume solutions.
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Affiliation(s)
- P Kehayias
- Department of Physics, Harvard University, Cambridge, 02138, MA, USA.,Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - A Jarmola
- ODMR Technologies Inc., El Cerrito, 94530, CA, USA. .,Department of Physics, University of California-Berkeley, Berkeley, 94720, CA, USA.
| | - N Mosavian
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - I Fescenko
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - F M Benito
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - A Laraoui
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - J Smits
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - L Bougas
- Johannes Gutenberg Universität Mainz, 55128, Mainz, Germany
| | - D Budker
- ODMR Technologies Inc., El Cerrito, 94530, CA, USA.,Department of Physics, University of California-Berkeley, Berkeley, 94720, CA, USA.,Helmholtz Institut Mainz, 55099, Mainz, Germany
| | - A Neumann
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - S R J Brueck
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA
| | - V M Acosta
- Center for High Technology Materials, Department of Physics and Astronomy, University of New Mexico, Albuquerque, 87106, NM, USA.
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Aliabadi-Zuckermann A, Goekler J, Kaider A, Uyanik-Uenal K, Riebandt J, Moayedifar R, Osorio E, Haberl T, Laufer G, Smits J, Zuckermann A. To Accept or Not Accept, That Is the Question: Donor Heart Selection Process and Outcome of Discarded Organs Transplanted in Another Center. J Heart Lung Transplant 2017. [DOI: 10.1016/j.healun.2017.01.1107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Malinovskis U, Berzins A, Smits J, Gahbauer FH, Ferber R, Erts D, Prikulis J. Fluorescent nanodiamond array deposition on porous anodized aluminum oxide using asperity assisted capillary force assembly. Proc Estonian Acad Sci 2017. [DOI: 10.3176/proc.2017.4.15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nossent G, Smits J, Gottlieb J. Correlation New UNOS LAS and ET LAS. J Heart Lung Transplant 2016. [DOI: 10.1016/j.healun.2016.01.1062] [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: 10/22/2022] Open
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Chanudet V, Smits J, Van Beek J, Boderie P, Guérin F, Serça D, Deshmukh C, Descloux S. Hydrodynamic and water quality 3D modelling of the Nam Theun 2 Reservoir (Lao PDR): predictions and results of scenarios related to reservoir management, hydrometeorology and nutrient input. ACTA ACUST UNITED AC 2014. [DOI: 10.1051/hydro/2014009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Suhling H, Rademacher J, Greer M, Warnecke G, Smits J, Haverich A, Welte T, Gottlieb J. Prospektive randomisierte Studie zum Vergleich konventioneller und elektronischer Patientenschulung nach Lungentransplantation. Pneumologie 2014. [DOI: 10.1055/s-0034-1368002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Marijnissen R, Smits J, Schoevers R, van den Brink R, Holewijn S, Franke B, de Graaf J, Oude Voshaar R. 1034 – The metabolic syndrome and late-life depression. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76160-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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20
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Gottlieb J, Rahmel A, Smits J. 143 A Web-Based Pilot Study of Judgment of the Transplant Benefit by Transplant Experts in Comparison to the Lung Allocation Score: The Eurotransplant Experience. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Hoefer D, Ruttmann-Ulmer E, Smits J, Grimm M, Antretter H. 347 Donor Hypo- and Hypernatremia Are Predictors for Increased 1-Year Mortality after Cardiac Transplantation. J Heart Lung Transplant 2011. [DOI: 10.1016/j.healun.2011.01.354] [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: 10/18/2022] Open
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Meiser B, Rahmel A, Kaczmarek I, Smits J, Reichart B. Impact of allocation rules on outcome after heart transplantation in Germany. Thorac Cardiovasc Surg 2010. [DOI: 10.1055/s-0029-1246922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Roels L, Spaight C, Smits J, Cohen B. Losing potential organ donors in critical care units: data from the Donor Action Database. Crit Care 2009. [PMCID: PMC4083964 DOI: 10.1186/cc7242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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Roels L, Spaight C, Smits J, Cohen B. Critical care staff attitudes to organ donation impact on national donation rates: data from the Donor Action Database. Crit Care 2009. [PMCID: PMC4083965 DOI: 10.1186/cc7243] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Smits J, Guguta C, Eeuwijk I, de Gelder R. Structural diversity of synthetic estrogen solvates. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307095256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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27
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Janssens F, Verswijvel G, Colla P, Smits J, Gubbelmans H, Palmers Y. Proximal pulmonary artery aneurysm. JBR-BTR 2003; 86:83-5. [PMID: 12839422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/21/2023]
Abstract
The authors report on a case of proximal pulmonary artery aneurysm detected on a routine chest X-ray. The scintigraphic and angiographic features of the condition are described and the importance of including the entity in the differential diagnosis of lung masses is stressed.
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Affiliation(s)
- F Janssens
- Department of Radiology, Ziekenhuis Oost Limburg, Genk, Belgium
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Janssens F, Verswijvel G, Smits J, Dams A, Verhelst H, Robaeys G, Palmers Y. Midgut volvulus in an adult patient. JBR-BTR 2003; 86:74-6. [PMID: 12839419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
The authors report on a case of midgut volvulus in a 27-year-old man who presented with bilious vomiting and acute abdominal pain. US demonstrated a reversal of the normal relationship between the superior mesenteric artery (SMA) and superior mesenteric vein (SMV). A clockwise whirlpool sign, diagnostic for midgut volvulus, was not visualised. In a further assessment, upper gastrointestinal series demonstrated obstruction in the second part of the duodenum highly suspicious of Ladd's bands. Malpositioning of bowel structures, as already suggested by the reversal of the SMA and SMV on ultrasound, and a distinctive whirl pattern due to the bowel wrapping around the SMA was demonstrated on CT. Furthermore angiography revealed focal twisting of the SMA. US is the first imaging modality to perform in suspicion of midgut volvulus. When inconclusive, CT is in our opinion the next stage in the diagnostic work-up.
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Affiliation(s)
- F Janssens
- Department of Radiology, Ziekenhuis Oost Limburg, Genk, Belgium
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Völker-Dieben HJ, Schreuder GMT, Claas FHJ, Doxiadis IIN, Schipper RF, Pels E, Persijn GG, Smits J, D'Amaro J. Histocompatibility and corneal transplantation. Dev Ophthalmol 2003; 36:22-41. [PMID: 12494678 DOI: 10.1159/000067653] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
BACKGROUND HLA typing and matching have been poorly implemented in corneal transplantation, mainly because of inconclusive or contradictory analytical results. Consequently, we studied the immune response of corneal transplant recipients to HLA histoincompatibilities in a large homogeneous study. METHODS All corneal transplantations were performed by a single surgeon in a single center between 1976 and 1996. Population genetic and other statistical analyses were performed. Simulation studies assessed the effects of HLA-DR mistypings on analytical results. RESULTS Mono- and multivariate analyses identified retransplantation, degree of vascularization, HLA-AB and -DR match grades, endothelial cell count, graft size, recipient gender, storage method and panel-reactive antibodies as significantly influencing the survival of corneal transplants. Simulation studies showed that the beneficial effect of HLA-DR matching is abrogated by HLA-DR mistypings. CONCLUSIONS Corneal transplant recipients have a normal immune response to HLA incompatibilities. Demonstration of that fact requires accurate HLA typings.
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Affiliation(s)
- H J Völker-Dieben
- Department of Ophthalmology, Vrije Universiteit Medisch Centrum, Amsterdam, The Netherlands.
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Affiliation(s)
- G G Persijn
- Eurotransplant International Foundation, Leiden, The Netherlands.
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Abstract
OBJECTIVE To examine whether characteristics of very small living areas can be used to predict disease incidence and to use these characteristics to assess socioeconomic differences in stroke incidence in the Netherlands. DESIGN Characteristics of postcode areas of stroke patients are compared with characteristics of postcode areas of all individual people in the study region, using Poisson regression analysis. SETTING Six provinces of the Netherlands, covering about half of the country. PATIENTS 760 patients who in 1991 or 1992 were consecutively admitted because of stroke to 23 Dutch hospitals. MAIN RESULTS Stroke incidence is significantly higher among people living in postcode areas with below average socioeconomic status (relative risk=1.27; 95% confidence intervals 1.08 to 1.51) and among people living in postcode areas with predominantly older inhabitants (RR=3.17; 95% CI=2.29 to 4.39). It is also significantly increased in more urbanised areas compared with the countryside, the highest incidence being found in the large cities (RR=1.78; 95% CI=1.31 to 2.44). CONCLUSIONS A clear socioeconomic gradient in stroke incidence in the Netherlands is observed, with people living in detailed postcode areas with below average socioeconomic status experiencing a significantly higher risk of stroke. The analysis also confirms that characteristics of detailed postcode areas can effectively be used to differentiate between areas with and areas without stroke patients.
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Affiliation(s)
- J Smits
- National Institute of Public Health and the Environment, Department for Health Services Research, Netherlands.
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Abstract
We describe the feasibility of chronic measurement of cardiac output (CO) in conscious mice. With the use of gas anesthesia, mice >30 g body wt were instrumented either with transit-time flow probes or electromagnetic probes placed on the ascending aorta. Ascending aortic flow values were recorded 6-16 days after surgery when probes had fully grown in. In the first set of experiments, while mice were under ketamine-xylazine anesthesia, estimates of stroke volume (SV) obtained by the transit-time technique were compared with those simultaneously obtained by echocardiography. Transit-time values of SV were similar to those obtained by echocardiography. The average difference +/- SD between the methods was 2 +/- 7 microl. In the second set of studies, transit-time values of CO were compared with those obtained by the electromagnetic flow probes. In conscious resting conditions, estimates +/- SD) of cardiac index (CI) obtained by the transit-time and electromagnetic flow probes were 484 +/- 119 and 531 +/- 103 ml x min(-1) x kg body wt(-1), respectively. Transit-time flow probes were also implanted in mice with a myocardial infarction (MI) induced by ligation of a coronary artery 3 wk before probe implantation. In these MI mice (n = 7), average (+/- SD) resting and stimulated (by volume loading) values of CO were significantly lower than in noninfarcted mice (n = 15) (resting CO 16 +/- 3 vs. 20 +/- 4 ml/min; stimulated CO 20 +/- 5 vs. 26 +/- 6 ml/min). Finally, using transfer function analysis, we found that, in resting conditions for both intact and MI mice, spontaneous variations in CO (> 0.1 Hz) were mainly due to those occurring in SV rather than in heart rate. These data indicate that CO can be measured chronically and reliably in conscious mice, also in conditions of heart failure, and that variations in preload are an important determinant of CO in this species.
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Affiliation(s)
- B Janssen
- Department of Pharmacology and Toxicology, Cardiovascular Research Institute Maastricht, Universiteit Maastricht, Maastricht, 6200 MD, The Netherlands.
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Affiliation(s)
- G G Persijn
- Eurotransplant International Foundation, Leiden, The Netherlands
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34
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Horlings E, Smits J. [The welfare effects of economic growth in the Netherlands, 1800-2000]. Tijdschr Soc Geschied 2001; 27:266-80. [PMID: 17557404] [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: 05/15/2023]
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35
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Völker-Dieben HJ, Claas FH, Schreuder GM, Schipper RF, Pels E, Persijn GG, Smits J, D'Amaro J. Beneficial effect of HLA-DR matching on the survival of corneal allografts. Transplantation 2000; 70:640-8. [PMID: 10972223 DOI: 10.1097/00007890-200008270-00018] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Although HLA typing and matching have been used for 3 decades, that practice has been poorly implemented in corneal transplantation, mainly because of inconclusive or contradictory analytical results. Consequently, we studied the immune response of corneal transplant recipients to HLA histoincompatibilities in a large homogeneous study. METHODS All corneal transplantations performed by a single surgeon between 1976 and 1996 were studied. HLA-AB matching was used for recipient selection. All HLA typings were performed by a single experienced laboratory. Population genetic techniques were used to assess the validity of the HLA typings. Mono- and multivariate analyses were performed to identify the factors which significantly influence the survival of corneal allografts. Simulation studies were carried out to demonstrate the effects of mis-typed donor and recipient HLA-DR typings on analytical results. RESULTS Retransplantation, degree of vascularization, HLA-AB and DR matching, endothelial cell count, graft size, recipient gender, and storage method were identified as significant factors by our monovariate analyses. A Cox proportional hazards survival analysis model identified degree of vascularization and HLA-AB and DR matching as significant prognostic factors when all immunological rejection episodes were used, P=0.000001. When only irreversible immunological rejection episodes were used, panel reactive antibodies, retransplantation, and number of rejection events were also identified, P=0.000001. Simulation studies showed that the effects of HLA-DR matching are abrogated by poor HLA-DR typings. CONCLUSIONS Corneal allograft recipients have a normal alloimmune response to histoincompatibilities. Demonstration of that fact requires accurate HLA typings.
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Affiliation(s)
- H J Völker-Dieben
- Department of Ophthalmology, Vrije Universiteit, Amsterdam, The Netherlands
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Creemers E, Cleutjens J, Smits J, Heymans S, Moons L, Collen D, Daemen M, Carmeliet P. Disruption of the plasminogen gene in mice abolishes wound healing after myocardial infarction. Am J Pathol 2000; 156:1865-73. [PMID: 10854210 PMCID: PMC1850078 DOI: 10.1016/s0002-9440(10)65060-2] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The plasminogen system plays an important role in the proteolytic degradation of extracellular matrices during wound healing. In the present study we investigated the impact of the plasminogen system on cardiac wound healing and function after myocardial infarction. Myocardial infarction was induced in plasminogen-deficient mice (Plg-/-) and in wild-type controls (Plg+/+). Structural analysis 1, 2, and 5 weeks after infarction revealed that infarct healing was virtually abolished in Plg-/- mice, indicating that the plasminogen system is required for the repair process of the heart after infarction. In the absence of plasminogen, inflammatory cells did not migrate into the infarcted myocardium. Necrotic cardiomyocytes were not removed and the formation of granulation tissue and fibrous tissue did not occur. In these non-healing infarcted hearts, LV dilatation was not altered. In addition, gelatinolytic activity of MMP-2 and MMP-9 was depressed in the Plg-/- infarcted hearts, suggesting that the plasmin effect on infarct healing may be mediated by MMPs. Surprisingly, cardiac function was only attenuated to a rather small extent in the Plg-/- infarcted mice when compared to the wild-types. This study provides direct prove that plasmin-mediated proteolysis plays a central role in cardiac wound healing after myocardial infarction in mice.
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Affiliation(s)
- E Creemers
- Department of Pathology and Pharmacology, Cardiovascular Research Institute Maastricht, Universiteit Maastricht, The Netherlands
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Alfani D, Pretagostini R, Bruzzone P, Smits J, Persijn G, Cortesini R. Kidney transplantation from living unrelated donors. Clin Transpl 1999:205-12. [PMID: 10503099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Our center activated our living-related donor (LRD) kidney transplantation program in 1967 and the living-unrelated donor (LURD) kidney transplantation program in 1968. We performed 62 kidney transplants (of which 6 were LURD) under conventional immunosuppression therapy of the period. During the cyclosporine era, our group performed the first living-donor kidney transplant in 1982 and the first LURD transplant in Europe in 1983. Since then 184 LURD transplants (1/3 of all living kidney transplants) took place in our center under cyclosporine therapy. LURD remains a controversial procedure as a consequence of problems related both to the donor's risk, which can be reduced by careful medical evaluation and selection, and to the recipient's outcome, including the importance of HLA compatibility, as well as concerns about the danger of commercialism. According to international evidence, as well as our own experience, LURD kidney transplantation is a safe and effective approach to increase the donor pool. Living donor mortality is extremely low, while long-term graft survival is the same as that observed after LRD transplantation and is superior to that for cadaver donor transplantation. We do not recommend DST because the long-term survival benefits do not justify the risks of sensitization and infections. At least for primary transplants, there is not an increased risk of transplantation from a husband to his wife with previous pregnancies. The pretransplant screening of taboo HLA mismatches could be useful to increase long-term graft survival. It is our opinion that LURD transplantation should be considered at least as good a clinical option as cadaver donor transplantation for patients with end-stage renal failure. A selective advantage of this procedure is that dialysis could be avoided before transplantation, with significant socio-economic benefits and improved recipient quality of life.
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Affiliation(s)
- D Alfani
- II Clinica Chirurgica, Università di Roma La Sapienza, Italy
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De Meester J, Persijn GG, Smits J, Vanrenterghem Y. The new Eurotransplant kidney allocation system: a justified balance between equity and utility? Transpl Int 1999; 12:299-300. [PMID: 10460880 DOI: 10.1007/s001470050229] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Affiliation(s)
- G G Persijn
- Eurotransplant International Foundation, Leiden, The Netherlands
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Alfani D, Pretagostini R, Rossi M, Poli L, De Simone P, Colonnello M, Novelli G, Urbano D, Venettoni S, Persijn G, Smits J, Cortesini R. Analysis of 160 consecutive living unrelated kidney transplants: 1983-1997. Transplant Proc 1997; 29:3399-401. [PMID: 9414764 DOI: 10.1016/s0041-1345(97)00954-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- D Alfani
- II Clinica Chirurgica, Università di Roma La Sapienza, Italy
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Alfani D, Pretagostini R, Rossi M, Poli L, Bruzzone P, Colonnello M, De Simone P, Berloco P, Persijn G, Smits J, Cortesini R. Living unrelated kidney transplantation: a 12-year single center experience. Transplant Proc 1997; 29:191-4. [PMID: 9122959 DOI: 10.1016/s0041-1345(96)00059-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- D Alfani
- II Clinica Chirurgica, Università di Roma La Sapienza, Italy
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Bischoff A, Erdbrügger W, Smits J, Michel MC. Neuropeptide Y-enhanced diuresis and natriuresis in anaesthetized rats is independent of renal blood flow reduction. J Physiol 1996; 495 ( Pt 2):525-34. [PMID: 8887762 PMCID: PMC1160810 DOI: 10.1113/jphysiol.1996.sp021612] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
1. Neuropeptide Y (NPY) has been reported to enhance diuresis and natriuresis in anaesthetized rats although it is a potent renal vasoconstrictor in vitro in vivo in several species. Therefore, we have investigated anaesthetized rats to see whether reduction in renal blood flow (RBF) and enhancement of diuresis and natriuresis can occur concomitantly, and how diuresis and natriuresis might be enhanced despite reduced RBF. 2. Systemic or intrarenal NPY infusion (0.03-3 micrograms kg-1 min-1) had only a small effect on mean arterial pressure (maximal increase 15-20 mmHg) and heart rate (maximal decrease 30 beats min-1) but dose-dependently reduced RBF (maximal peak reduction 3 ml min-1) Endogenous creatinine clearance was not significantly altered. 3. In anaesthetized rats systemic infusion of 1 or 3 micrograms kg-1 min-1 NPY enhanced urine formation and sodium and calcium excretion by a maximum of 110, 110 and 45%, respectively, but did not alter potassium excretion. Enhancement of diuresis was also detectable in conscious rats. 4. The diuretic and natriuretic effects of systemically infused NPY were at least partly maintained in rats with decapsulated kidneys and in rats where NPY-induced increase of renal perfusion pressure was excluded mechanically by an adjustable clamp placed on the abdominal aorta. 5. Intrarenal infusion of 0.3 or 1 microgram kg-1 min-1 NPY reduced RBF to a greater extent than systemic infusion (maximal peak reduction 4 ml min-1) but caused a smaller enhancement or even a reduction of urine formation and sodium excretion. 6. We conclude that systemic infusion of NPY reduces RBF by a direct effect on the renal vasculature. Systemic NPY infusion enhances urine formation and sodium and calcium excretion. This occurs independently (at least in part) of pressure natriuresis by formation and/or release of an extrarenal factor which might act on distal tubules and/or collecting ducts.
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Affiliation(s)
- A Bischoff
- Department of Medicine, University of Essen, Germany
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Palmers Y, De Greef D, Grynne BH, Smits J, Put E. A double-blind study comparing safety, tolerability and efficacy of iodixanol 320 mgI/ml and ioxaglate 320 mgI/ml in cerebral arteriography. Eur J Radiol 1993; 17:203-9. [PMID: 8293750 DOI: 10.1016/0720-048x(93)90105-v] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Iodixanol is a new nonionic dimer, isotonic with blood at all concentrations. Iodixanol 320 mgI/ml was compared in a double-blind, randomized study to the ionic dimer ioxaglate 320 mgI/ml for evaluation of safety and efficacy parameters during cerebral arteriography. Eighty adult patients were enrolled and all completed the trial. Radiographic efficacy was assessed from the diagnostic information and the radiographic density. Safety was evaluated by recording discomfort and other adverse events, changes in ECG, heart rate and blood pressure, changes in intra-arterial blood pressure and circulation time. No difference between the two contrast media were noted radiographically. No clinically important changes from baseline or between the two contrast media were found in ECG, heart rate, blood pressure or intra-arterial blood pressure. Although not statistically significant, a somewhat longer mean circulation time was found with iodixanol, probably due to its slightly higher viscosity. Injection-associated warmth sensation and pain were more intense with ioxaglate than with iodixanol, and pain was statistically more frequent after injection of ioxaglate. A high incidence of adverse events other than discomfort is reported in this study, mainly related to the selective arteriographic procedure itself. The adverse events related to the contrast medium were more frequent with ioxaglate (27% of the total number of adverse events) than with iodixanol (10%). The new isotonic nonionic dimer iodixanol offers significantly better comfort to the patient than does ioxaglate. This is an important feature, especially in relatively risky procedures that are unpleasant for the patients, such as conventional cerebral angiography.
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Affiliation(s)
- Y Palmers
- Radiology Department, St Jan Hospital, Genk, Belgium
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Huijberts M, Wolffenbuttel B, Crijns F, Kruseman AN, Bemelmans M, Van Essen H, Smits J, Boudier HS. Inhibition of angiotensin-converting enzyme reduces urinary albumin excretion but not regional albumin clearance in experimental diabetes. Eur J Pharmacol 1993; 240:207-12. [PMID: 8243539 DOI: 10.1016/0014-2999(93)90900-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Albuminuria and increased regional albumin clearance are known to develop concomitantly in diabetes. The anti-proteinuric effect of angiotensin-converting enzyme inhibitor therapy is well established. We studied whether angiotensin-converting enzyme inhibitor therapy with perindoprilat in comparison with conventional antihypertensive treatment could influence the development of increased regional albumin clearance as well as albuminuria in experimental diabetes. Rats with streptozotocin-induced diabetes were randomized into a saline group (n = 7), a perindoprilat (1 mg/kg per day) group (n = 8), and a hydralazine (3 mg/kg per day) group (n = 6); six rats served as non-diabetic controls. After 6-8 weeks, blood pressure was equally reduced in the perindoprilat- and hydralazine-treated groups (P < 0.01). Twenty-four-hour urinary protein and albumin excretion were increased in diabetic rats compared to control rats (P < 0.001). Hydralazine did not reduce 24 h protein or albumin excretion, whereas perindoprilat treatment reduced both (P < 0.001) to levels comparable to those of control rats. Regional albumin clearance, assessed in the eye, ileum, lung, skeletal muscle and skin, was clearly elevated in diabetic rats compared to control rats; however, neither drug therapy had an effect on albumin clearance.
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Affiliation(s)
- M Huijberts
- Department of Internal Medicine, University Hospital Maastricht, Netherlands
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46
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Abstract
Heterogeneous immunoassays require wash steps in order to separate bound from free constituents. In this paper we demonstrate that in microplate assays the washing process includes two separate physical processes: (1) a rapid and wash volume-dependent direct dilution of the droplet-shaped residual volume, and (2) a diffusion-limited and strongly time-dependent dilution of a residual layer of liquid, which necessitates the use of time-consuming soak times in the immunoassay. We have shown that optimizing the motion of the wash fluid effectively reduces the residual layer thickness that results in extended soak times. This results not only in improved washing efficiency and reduced background variance in the immunoassay, it also yields a significantly improved immunoassay sensitivity.
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Affiliation(s)
- T Beumer
- Methodology Research Unit, Organon Teknika BV, Boxtel, Netherlands
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Pybus MJ, Samuel WM, Welch DA, Smits J, Haigh JC. Mortality of fallow deer (Dama dama) experimentally-infected with meningeal worm, Parelaphostrongylus tenuis. J Wildl Dis 1992; 28:95-101. [PMID: 1548808 DOI: 10.7589/0090-3558-28.1.95] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Six fallow deer (Dama dama) fawns died after receiving 25 to 150 infective larvae of Parelaphostrongylus tenuis. Fawns given higher doses usually died sooner (6 to 23 days) than those given lower doses (54 to 67 days). Early deaths were associated with severe acute peritonitis resulting from perforation of the intestinal wall; later deaths were associated with paralysis and inability to rise. Numerous adult P. tenuis were found within neural tissues of the brain and spinal cord in the three fawns with paralysis. One white-tailed deer (Odocoileus virginianus) exposed to infective larvae from the same source survived infection without exhibiting clinical signs and began passing larvae in feces 88 days post-exposure. At the doses used in this study, meningeal worm caused fatal infections in fallow deer. Results are compared to published observations of fallow deer naturally-infected with P. tenuis.
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Affiliation(s)
- M J Pybus
- Alberta Fish and Wildlife Division, Edmonton, Canada
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Abstract
A 41-year-old man with clinical Cushing's syndrome and intermittent central ACTH hypersecretion for a period of 9 1/2 years follow-up is described. Episodes of biochemical and clinical remission alternated with periods of florid Cushing's disease, characterized by circadian hyperpulsatile ACTH and cortisol secretion. Responses to metyrapone and inhibition of ACTH and cortisol hypersecretion after high dose dexamethasone during active phases of the disease favored a central origin of ACTH hypersecretion, confirmed by simultaneous bilateral venous sampling of the sinus petrosus inferior. Prolonged clinical remission followed near total anterior hypophysectomy. However, on anatomopathological examination of the pituitary neither corticotroph cell hyperplasia nor a microadenoma could be documented. The possibility of a functional ACTH hypersecretion is discussed.
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Affiliation(s)
- B Velkeniers
- Department of Endocrinology, University Hospital of Brussels, Belgium
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Smits J. Comments on game farming. Can Vet J 1990; 31:676-7. [PMID: 17423672 PMCID: PMC1480859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
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Hennipman A, van Oirschot BA, Smits J, Rijksen G, Staal GE. Tyrosine kinase activity in breast cancer, benign breast disease, and normal breast tissue. Cancer Res 1989; 49:516-21. [PMID: 2910471] [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] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Tyrosine specific protein kinase activity was determined in 70 specimens of the human mammary gland. These included 28 cancers of the breast, 21 benign breast diseases, and 21 normal breast tissues. We measured tyrosine kinase activity in the cytosol fraction and in the membrane fraction of the homogenates. In addition cytosolic aldolase activity was measured. Tyrosine kinase activity was determined using poly(glutamic acid:tyrosine = 4:1) as an artificial substrate. Cancers of the breast exhibited considerable higher tyrosine kinase activities in both cytosol and membrane fractions, compared to benign breast tumors (P less than or equal to 0.001). Benign tumors demonstrated increased activities in cytosol in comparison to normal breast tissues (P less than 0.001). Furthermore, there appears to be a strong association of an enhanced expression of activity of tyrosine kinase in cytosol of primary carcinomas and early systemic relapse. In combination with aldolase activity a nearly complete discrimination is achieved between malignant specimens on one hand and benign and normal tissues on the other.
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Affiliation(s)
- A Hennipman
- Surgical Department, University Hospital, Utrecht, The Netherlands
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