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Bluemink J, Hoesl M, Seravalli E, Van den Berg C, Raaymakers B, Visser J. PO-0920: Proton planning on segmented CTs for head and neck tumors. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31230-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Crama K, Visser J, Bijker N, Kolff M, Bel A. EP-2361: What is the gain of breath hold for re-irradiation of recurrent left-sided breast cancer with VMAT? Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32670-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kamphuis M, Crama K, De Jong M, Hulshof M, Westerveld G, Visser J, Van Wieringen N. EP-2373: Pathologic pelvic lymph node displacement and the predictive value of pre-treatment imaging. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)32681-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Heerden L, Visser J, Koedooder C, Rasch C, Pieters B, Bel A. OC-0174: Deformable image registration for dose accumulation of adaptive EBRT and BT in cervical cancer. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)30484-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Schiever JF, Visser J, van der Merwe M, Nel DG. Evaluation of nutrition care to adult patients on HAART attending primary healthcare facilities in Mpumalanga. SOUTH AFRICAN JOURNAL OF CLINICAL NUTRITION 2018. [DOI: 10.1080/16070658.2017.1412183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Blaauw R, Achar E, Dolman R, Harbron J, Moens M, Munyi F, Nel D, Nyatefe D, Visser J. MON-P198: Hospital Malnutrition on the African Continent: We have a Problem. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)30889-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Biegun A, van Goethem MJ, van der Graaf E, van Beuzekom M, Koffeman E, Nakaji T, Takatsu J, Visser J, Brandenburg S. The optimal balance between quality and efficiency in proton radiography imaging technique at various proton beam energies: A Monte Carlo study. Phys Med 2017; 41:141-146. [DOI: 10.1016/j.ejmp.2017.08.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 08/04/2017] [Accepted: 08/09/2017] [Indexed: 11/30/2022] Open
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van Hoogenhuijze NE, Torrance HL, Mol F, Laven JSE, Scheenjes E, Traas MAF, Janssen C, Cohlen B, Teklenburg G, de Bruin JP, van Oppenraaij R, Maas JWM, Moll E, Fleischer K, van Hooff MH, de Koning C, Cantineau A, Lambalk CB, Verberg M, Nijs M, Manger AP, van Rumste M, van der Voet LF, Preys-Bosman A, Visser J, Brinkhuis E, den Hartog JE, Sluijmer A, Jansen FW, Hermes W, Bandell ML, Pelinck MJ, van Disseldorp J, van Wely M, Smeenk J, Pieterse QD, Boxmeer JC, Groenewoud ER, Eijkemans MJC, Kasius JC, Broekmans FJM. Endometrial scratching in women with implantation failure after a first IVF/ICSI cycle; does it lead to a higher live birth rate? The SCRaTCH study: a randomized controlled trial (NTR 5342). BMC WOMENS HEALTH 2017; 17:47. [PMID: 28732531 PMCID: PMC5521151 DOI: 10.1186/s12905-017-0378-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Accepted: 03/07/2017] [Indexed: 12/17/2022]
Abstract
BACKGROUND Success rates of assisted reproductive techniques (ART) are approximately 30%, with the most important limiting factor being embryo implantation. Mechanical endometrial injury, also called 'scratching', has been proposed to positively affect the chance of implantation after embryo transfer, but the currently available evidence is not yet conclusive. The primary aim of this study is to determine the effect of endometrial scratching prior to a second fresh in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycle on live birth rates in women with a failed first IVF/ICSI cycle. METHOD Multicenter randomized controlled trial in Dutch academic and non-academic hospitals. A total of 900 women will be included of whom half will undergo an endometrial scratch in the luteal phase of the cycle prior to controlled ovarian hyperstimulation using an endometrial biopsy catheter. The primary endpoint is the live birth rate after the 2nd fresh IVF/ICSI cycle. Secondary endpoints are costs, cumulative live birth rate (after the full 2nd IVF/ICSI cycle and over 12 months of follow-up); clinical and ongoing pregnancy rate; multiple pregnancy rate; miscarriage rate and endometrial tissue parameters associated with implantation failure. DISCUSSION Multiple studies have been performed to investigate the effect of endometrial scratching on live birth rates in women undergoing IVF/ICSI cycles. Due to heterogeneity in both the method and population being scratched, it remains unclear which group of women will benefit from the procedure. The SCRaTCH trial proposed here aims to investigate the effect of endometrial scratching prior to controlled ovarian hyperstimulation in a large group of women undergoing a second IVF/ICSI cycle. TRIAL REGISTRATION NTR 5342 , registered July 31st, 2015. PROTOCOL VERSION Version 4.10, January 4th, 2017.
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van Onna MA, Visser J, van der Hulst RRWJ. Limitation of ischaemic tissue response in a reconstruction with short ischaemia time during free flap surgery. J Plast Reconstr Aesthet Surg 2017. [PMID: 28625756 DOI: 10.1016/j.bjps.2017.05.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Danhof NA, van Wely M, Koks CAM, Gianotten J, de Bruin JP, Cohlen BJ, van der Ham DP, Klijn NF, van Hooff MHA, Broekmans FJM, Fleischer K, Janssen CAH, Rijn van Weert JM, van Disseldorp J, Twisk M, Traas M, Verberg MFG, Pelinck MJ, Visser J, Perquin DAM, Boks DES, Verhoeve HR, van Heteren CF, Mol BWJ, Repping S, van der Veen F, Mochtar MH. The SUPER study: protocol for a randomised controlled trial comparing follicle-stimulating hormone and clomiphene citrate for ovarian stimulation in intrauterine insemination. BMJ Open 2017; 7:e015680. [PMID: 28550023 PMCID: PMC5729997 DOI: 10.1136/bmjopen-2016-015680] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVE To study the effectiveness of four cycles of intrauterine insemination (IUI) with ovarian stimulation (OS) by follicle-stimulating hormone (FSH) or by clomiphene citrate (CC), and adherence to strict cancellation criteria. SETTING Randomised controlled trial among 22 secondary and tertiary fertility clinics in the Netherlands. PARTICIPANTS 732 women from couples diagnosed with unexplained or mild male subfertility and an unfavourable prognosis according to the model of Hunault of natural conception. INTERVENTIONS Four cycles of IUI-OS within a time horizon of 6 months comparing FSH 75 IU with CC 100 mg. The primary outcome is ongoing pregnancy conceived within 6 months after randomisation, defined as a positive heartbeat at 12 weeks of gestation. Secondary outcomes are cancellation rates, number of cycles with a monofollicular or with multifollicular growth, number of follicles >14 mm at the time of ovulation triggering, time to ongoing pregnancy, clinical pregnancy, miscarriage, live birth and multiple pregnancy. We will also assess if biomarkers such as female age, body mass index, smoking status, antral follicle count and endometrial aspect and thickness can be used as treatment selection markers. ETHICS AND DISSEMINATION The study has been approved by the Medical Ethical Committee of the Academic Medical Centre and from the Dutch Central Committee on Research involving Human Subjects (CCMO NL 43131-018-13). Results will be disseminated through peer-reviewed publications and presentations at international scientific meetings. TRIAL REGISTRATION NUMBER NTR4057.
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Visser J, van Staden PJ, Soma P, Buys AV, Pretorius E. The stabilizing effect of an oligomeric proanthocyanidin on red blood cell membrane structure of poorly controlled Type II diabetes. Nutr Diabetes 2017; 7:e275. [PMID: 28504711 PMCID: PMC5518807 DOI: 10.1038/nutd.2017.25] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 03/17/2017] [Accepted: 03/24/2017] [Indexed: 02/06/2023] Open
Abstract
Type II diabetes (T2D) is a pandemic characterized by pathological circulating inflammatory markers, high-glucose levels and oxidative stress. The hematological system is especially vulnerable to these aberrant circulating molecules, and erythrocytes (RBCs) show aberrant rheology properties, owing to the direct contact with these molecules. Pathological levels of circulating inflammatory markers in T2D therefore have a direct effect on the molecular and cellular structure of RBCs. Previous research has suggested that antioxidants may reduce oxidative stress that results from the pathological inflammatory markers. Particularly, polyphenol antioxidants like oligomeric proanthocyanidins (OPCs) may act as a hydroxyl mopping agent, and may have a positive effect on the deformability and membrane protein structure of RBCs from T2D. In this paper, we look at the effect of one such agent, Pinus massoniana bark extract (standardized to 95% oligomeric proanthicyanidins), on the RBC membrane structures and RBC shape changes of T2D, after laboratory exposure at physiological levels. Our methods of choice were atomic force microscopy and scanning electron microscopy to study RBC elasticity and ultrastructure. Results showed that in our hands, this OPC could change both the eryptotic nature of the RBCs, as viewed with scanning electron microscopy, as well as the elasticity. We found a significant difference in variation between the elasticity measurement values between the RBCs before and after OPC exposure (P-value <0.0001). In conclusion, the data from both these techniques therefore suggest that OPC usage might contribute to the improvement of RBC functioning.
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Van Dijk I, Visser J, Wiersma J, Van Boggelen J, Balgobind B, Feijen L, Huijskens S, Kremer L, Rasch C, Bel A. EP-1379: Heart volume reduction in paediatric cancer patients during radiotherapy. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31814-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Crama K, Houweling A, Visser J, Fukata K, Rasch C, Ohno T, Bel A, Van der Horst A. OC-0354: Dosimetric impact of anatomical changes in photon and particle therapy for pancreatic cancer. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30796-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Seravalli E, Bosman M, Smyth G, Alapetite C, Christiaens M, Gandola L, Hoeben B, Horan G, Koutsouveli E, Kusters M, Lassen Y, Losa S, Magelssen H, Marchant T, Mandeville H, Oldenburger F, Padovani L, Paraskevopoulou C, Rombi B, Visser J, Whitfield G, Schwarz M, Vestergaard A, Janssens G. OC-0345: Comparing cranio spinal irradiation planning for photon and proton techniques at 15 European centers. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30787-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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De Jong R, Van Wieringen N, Visser J, Wiersma J, Crama K, Geijsen D, Lutkenhaus L, Bel A. OC-0356: Adaptive strategy for rectal cancer: evaluation of plan selection of the first 20 clinical patients. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30798-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Benčina M, Štaudohar M, Panneman H, Ruijter GJ, Visser J, Legiša M, Hammerschmid M, Neuper I, Konopitzky K, Bayer K, Josić D, Kovács KL, Rákhely G, Pott AS, Takács M, Tóth A, Bratu H, Gyõrfi K, Fodor B, Tusz J, Dahl C, Legiša M, Benčina M, Gradišnik-Grapulin M, Lukančič I, Kraševec N, Svetina M, Komel R, Podgornik A, Barut M, Strancar A, Josić D, Koloini T, Gaberc-Porekar V, Menart V, Zhu HY, Petrovič N, Ling KS, Gonsalves D. Abstracts. Pflugers Arch 2016. [DOI: 10.1007/s004240000102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Stevenson C, Blaauw R, Fredericks E, Visser J, Roux S. SUN-P140: Nutrient Intakes and the Validity and Reliability of Dietary Data in Irritable Bowel Syndrome Patients. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30483-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Biegun A, Takatsu J, Nakaji T, van Goethem MJ, van der Graaf E, Koffeman E, Visser J, Brandenburg S. Effect of scattering angle on energy loss radiography imaging for various proton energies relevant in proton therapy: A simulation study. Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.07.462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Mouser VHM, Melchels FPW, Visser J, Dhert WJA, Gawlitta D, Malda J. Yield stress determines bioprintability of hydrogels based on gelatin-methacryloyl and gellan gum for cartilage bioprinting. Biofabrication 2016; 8:035003. [PMID: 27431733 PMCID: PMC4954607 DOI: 10.1088/1758-5090/8/3/035003] [Citation(s) in RCA: 182] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bioprinting of chondrocyte-laden hydrogels facilitates the fabrication of constructs with controlled organization and shape e.g. for articular cartilage implants. Gelatin-methacryloyl (gelMA) supplemented with gellan gum is a promising bio-ink. However, the rheological properties governing the printing process, and the influence of gellan gum on the mechanical properties and chondrogenesis of the blend, are still unknown. Here, we investigated the suitability of gelMA/gellan for cartilage bioprinting. Multiple concentrations, ranging from 3% to 20% gelMA with 0%-1.5% gellan gum, were evaluated for their printability, defined as the ability to form filaments and to incorporate cells at 15 °C-37 °C. To support the printability assessment, yield stress and viscosity of the hydrogels were measured. Stiffness of UV-cured constructs, as well as cartilage-like tissue formation by embedded chondrocytes, were determined in vitro. A large range of gelMA/gellan concentrations were printable with inclusion of cells and formed the bioprinting window. The addition of gellan gum improved filament deposition by inducing yielding behavior, increased construct stiffness and supported chondrogenesis. High gellan gum concentrations, however, did compromise cartilage matrix production and distribution, and even higher concentrations resulted in too high yield stresses to allow cell encapsulation. This study demonstrates the high potential of gelMA/gellan blends for cartilage bioprinting and identifies yield stress as a dominant factor for bioprintability.
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Stevenson C, Blaauw R, Fredericks E, Visser J, Roux S. Food avoidance in irritable bowel syndrome leads to a nutrition-deficient diet. SOUTH AFRICAN JOURNAL OF CLINICAL NUTRITION 2016. [DOI: 10.1080/16070658.2014.11734481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Visser J, Notelovitz T, Szabo C, Fredericks N. Abnormal eating attitudes and weight-loss behaviour of adolescent girls attending a “traditional” Jewish high school in Johannesburg, South Africa. SOUTH AFRICAN JOURNAL OF CLINICAL NUTRITION 2016. [DOI: 10.1080/16070658.2014.11734511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Visser J, Marais M, du Plessis J, Steenkamp I, Troskie I. Experiences and attitudes of dietitians during the first compulsory community service year (2003). SOUTH AFRICAN JOURNAL OF CLINICAL NUTRITION 2016. [DOI: 10.1080/16070658.2006.11734084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Visser J, Mackenzie A, Marais D. Job satisfaction of South African registered dietitians. SOUTH AFRICAN JOURNAL OF CLINICAL NUTRITION 2016. [DOI: 10.1080/16070658.2012.11734415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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De Jong R, Lutkenhaus L, Van Wieringen N, Visser J, Wiersma J, Crama K, Geijsen D, Bel A. SP-0423: Implementation of daily plan selection in rectum. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)31672-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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