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Dimmendaal M, Kracht PAM, Dijkstra S, Arends JE, Woonink F, Behalf Of The Reach Working Group O. Retrieval of chronic hepatitis B patients in the Utrecht region in the Netherlands. Neth J Med 2019; 77:199-203. [PMID: 31391325] [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: 06/10/2023]
Abstract
BACKGROUND In the Netherlands, approximately 200 patients die annually from a chronic hepatitis B (CHB) infection, even though effective antiviral treatment is available. There are an estimated 49,000 Dutch CHB patients. Many of these patients have been lost to follow-up (LFU) over time. The study aimed to trace LFU CHB patients in the province of Utrecht and bring them back into care. METHODS Positive hepatitis B surface antigen (HBsAg) tests from 2001-2015 were collected from the four hospitals in the Utrecht province and linked to medical records. The general practitioners (GPs) were requested in writing to evaluate LFU CHB patients and to refer patients when needed. In addition, GPs were asked to fill out a questionnaire on the patients' characteristics and to indicate reasons for not being able to perform an evaluation. RESULTS A total of 2,242 chronic CHB patients were identified based on HBsAg-positive serology. After review of their medical records, 599 (27%) patients were eligible for retrieval. Of those, the GP response rate was 49% (n = 292) and 62 patients (10%) of the eligible CHB patients could be evaluated. Of these, 20 patients (3%) were referred to a hospital and 42 patients (7%) did not have an indication for referral. CONCLUSION Lost to follow-up CHB patients can be traced through screening of past positive HBsAg tests. There was willingness among GPs to participate in the retrieval of CHB patients. This may contribute to the reduction of the CHB-related burden of disease.
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Affiliation(s)
- M Dimmendaal
- Department for Infectious Disease Control, Public Health Services Utrecht region (GGDrU), Zeist, the Netherlands
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Stacchiotti S, Gronchi A, Fossati P, Akiyama T, Alapetite C, Baumann M, Blay JY, Bolle S, Boriani S, Bruzzi P, Capanna R, Caraceni A, Casadei R, Colia V, Debus J, Delaney T, Desai A, Dileo P, Dijkstra S, Doglietto F, Flanagan A, Froelich S, Gardner PA, Gelderblom H, Gokaslan ZL, Haas R, Heery C, Hindi N, Hohenberger P, Hornicek F, Imai R, Jeys L, Jones RL, Kasper B, Kawai A, Krengli M, Leithner A, Logowska I, Martin Broto J, Mazzatenta D, Morosi C, Nicolai P, Norum OJ, Patel S, Penel N, Picci P, Pilotti S, Radaelli S, Ricchini F, Rutkowski P, Scheipl S, Sen C, Tamborini E, Thornton KA, Timmermann B, Torri V, Tunn PU, Uhl M, Yamada Y, Weber DC, Vanel D, Varga PP, Vleggeert-Lankamp CLA, Casali PG, Sommer J. Best practices for the management of local-regional recurrent chordoma: a position paper by the Chordoma Global Consensus Group. Ann Oncol 2018; 28:1230-1242. [PMID: 28184416 PMCID: PMC5452071 DOI: 10.1093/annonc/mdx054] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Chordomas are rare, malignant bone tumors of the skull-base and axial skeleton. Until recently, there was no consensus among experts regarding appropriate clinical management of chordoma, resulting in inconsistent care and suboptimal outcomes for many patients. To address this shortcoming, the European Society of Medical Oncology (ESMO) and the Chordoma Foundation, the global chordoma patient advocacy group, convened a multi-disciplinary group of chordoma specialists to define by consensus evidence-based best practices for the optimal approach to chordoma. In January 2015, the first recommendations of this group were published, covering the management of primary and metastatic chordomas. Additional evidence and further discussion were needed to develop recommendations about the management of local-regional failures. Thus, ESMO and CF convened a second consensus group meeting in November 2015 to address the treatment of locally relapsed chordoma. This meeting involved over 60 specialists from Europe, the United States and Japan with expertise in treatment of patients with chordoma. The consensus achieved during that meeting is the subject of the present publication and complements the recommendations of the first position paper.
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Affiliation(s)
| | - A Gronchi
- Surgery, Fondazione IRCCS Istituto Nazionale Tumori, Milan
| | - P Fossati
- CNAO National Center for Oncological Hadrontherapy, Pavia.,Department of Radiotherapy, IEO-European Institute of Oncology, Milan, Italy
| | - T Akiyama
- Department of Orthopaedic Surgery, Saitama Medical Center, Jichi Medical University, Saitama, Japan
| | - C Alapetite
- Department of Radiotherapy, Institut Curie, Paris.,Institut Curie-Centre de Protonthérapie d'Orsay (ICPO), Orsay, France
| | - M Baumann
- Department of Radiation Oncology, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - J Y Blay
- Cancer Medicine Department, Centre Léon Bérard, Lyon
| | - S Bolle
- Department of Radiotherapy, Gustave Roussy, Villejuif Cedex, France
| | - S Boriani
- Department of Degenerative and Oncological Spine Surgery, Rizzoli Institute Bologna, Bologna
| | - P Bruzzi
- Department of Epidemiology, IRCCS Azienda Ospedaliera Universitaria San Martino, IST Istituto Nazionale per la Ricerca sul Cancro, Genova
| | - R Capanna
- University Clinic of Orthopedics and Traumatology AO Pisa, Pisa
| | - A Caraceni
- Palliative Care Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan
| | - R Casadei
- Orthopedic Department, Rizzoli Institute Bologna, Bologna, Italy
| | - V Colia
- Departments of Cancer Medicine
| | - J Debus
- Department of Radiation Oncology, University of Heidelberg, Heidelberg, Germany
| | - T Delaney
- Department of Radiation Oncology, Francis H. Burr Proton Therapy Center, Massachusetts General Hospital, Boston, USA
| | - A Desai
- Midlands Abdominal and Retroperitoneal Sarcoma Unit (MARSU), Queen Elizabeth Hospital, Birmingham
| | - P Dileo
- Department of Oncology, University College London Hospitals (UCLH), London, UK
| | - S Dijkstra
- Department of Orthopaedic Surgery, Leiden University Medical Centre, Leiden, The Netherlands
| | - F Doglietto
- Institute of Neurosurgery, University of Brescia, Brescia, Italy
| | - A Flanagan
- University College London Cancer Institute, London.,Histopathology Department, Royal National Orthopaedic Hospital NHS Trust, Stanmore, UK
| | - S Froelich
- Department of Neurosurgery, Paris Diderot University, Hôpital Lariboisière, Paris, France
| | - P A Gardner
- Department of Neurological Surgery, University of Pittsburgh School of Medicine, Pittsburgh, USA
| | - H Gelderblom
- Department of Medical Oncology, Leiden University Medical Center, Leiden, The Netherlands
| | - Z L Gokaslan
- Department of Neurosurgery, Brown University School of Medicine, Providence, USA
| | - R Haas
- Department of Radiotherapy, The Netherlands Cancer Institute, Amsterdam, The Netherlands
| | - C Heery
- Laboratory of Tumor Immunology and Biology, Center for Cancer Research, National Cancer Institute, Bethesda, USA
| | - N Hindi
- Department of Cancer Medicine, Hospital Universitario Virgen del Rocio, Sevilla, Spain
| | - P Hohenberger
- Sarcoma Unit, Interdisciplinary Tumor Center, Mannheim University Medical Center, University of Heidelberg, Mannheim, Germany
| | - F Hornicek
- Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, USA
| | - R Imai
- National Institute of Radiological Sciences, Research Center Hospital for Charged Particle Therapy, Chiba, Japan
| | - L Jeys
- Department of Orthopaedics, Royal Orthopaedic Hospital Birmingham, Birmingham
| | - R L Jones
- Sarcoma Unit, Royal Marsden NHS Foundation Trust and Institute of Cancer Research, London, UK
| | - B Kasper
- Sarcoma Unit, Interdisciplinary Tumor Center, Mannheim University Medical Center, University of Heidelberg, Mannheim, Germany
| | - A Kawai
- Musculoskeletal Oncology and Rehabilitation Medicine, National Cancer Center, Tokio, Japan
| | - M Krengli
- Radiotherapy Department, University of Piemonte Orientale, Novara, Italy
| | - A Leithner
- Department of Orthopaedics and Orthopaedic Surgery, Medical University Graz, Graz, Austria
| | - I Logowska
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - J Martin Broto
- Department of Cancer Medicine, Hospital Universitario Virgen del Rocio, Sevilla, Spain
| | - D Mazzatenta
- Department of Neurosurgery, IRCCS Istituto delle Scienze Neurologiche, Bologna
| | - C Morosi
- Department of Radiology, Fondazione IRCCS Istituto Nazionale Tumori, Milan
| | - P Nicolai
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Brescia, Brescia, Italy
| | - O J Norum
- Department of Tumor Orthopedic Surgery, The Norwegian Radium Hospital, Oslo, Norway
| | - S Patel
- Department of Sarcoma Medical Oncology, MD Anderson Cancer Center, Houston, USA
| | - N Penel
- Cencer Medicine Department, Oscar Lambret Cancer Centre, Lille, France
| | - P Picci
- Laboratory of Oncologic Research, Istituto Ortopedico Rizzoli, Bologna
| | - S Pilotti
- Laboratory of Molecular Pathology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - S Radaelli
- Surgery, Fondazione IRCCS Istituto Nazionale Tumori, Milan
| | - F Ricchini
- Palliative Care Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milan
| | - P Rutkowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - S Scheipl
- Department of Orthopaedics and Orthopaedic Surgery, Medical University Graz, Graz, Austria
| | - C Sen
- Department of Neurosurgery, NYU Langone Medical Center, New York
| | - E Tamborini
- Laboratory of Molecular Pathology, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - K A Thornton
- Center for Bone and Soft Tissue Sarcoma, Brigham and Women's Hospital/Dana-Farber Cancer Institute, Harvard Medical School, Boston, USA
| | - B Timmermann
- Particle Therapy Department, West German Proton Therapy Centre Essen, University Hospital Essen, Essen, Germany
| | - V Torri
- Oncology Unit, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - P U Tunn
- Department of Orthopaedic Oncology, HELIOS Klinikum Berlin-Buch, Berlin, Germany
| | - M Uhl
- Department of Radiation Oncology, University of Heidelberg, Heidelberg, Germany
| | - Y Yamada
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, USA
| | - D C Weber
- Paul Scherrer Institut PSI, Villigen, Switzerland
| | - D Vanel
- Department of Radiology, Istituto Ortopedico Rizzoli, Bologna, Italy
| | - P P Varga
- National Center for Spinal Disorders, Budapest, Hungary
| | | | | | - J Sommer
- Chordoma Foundation, Durham, USA
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Bollen L, Groenen K, Pondaag W, Van Rijswijk C, Fiocco M, Van der Linden Y, Dijkstra S. EP-1385: Evaluation of the Spinal Instability Neoplastic Score for spinal metastases. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31820-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Willeumier J, Dijkstra S, Van der Linden Y. An easy-to-use prognostic model for survival in patients with cancer and symptomatic metastases of the long bones. Eur J Cancer 2017. [DOI: 10.1016/s0959-8049(17)30593-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dijkstra S, Kooij G, Verbeek R, van der Pol SMA, Amor S, Geisert EE, Dijkstra CD, van Noort JM, Vries HED. Targeting the tetraspanin CD81 blocks monocyte transmigration and ameliorates EAE. Neurobiol Dis 2008; 31:413-21. [PMID: 18586096 DOI: 10.1016/j.nbd.2008.05.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2008] [Revised: 05/16/2008] [Accepted: 05/23/2008] [Indexed: 11/18/2022] Open
Abstract
Leukocyte infiltration is a key step in the development of demyelinating lesions in multiple sclerosis (MS), and molecules mediating leukocyte-endothelial interactions represent prime candidates for the development of therapeutic strategies. Here we studied the effects of blocking the integrin-associated tetraspanin CD81 in in vitro and in vivo models for MS. In an in vitro setting mAb against CD81 significantly reduced monocyte transmigration across brain endothelial cell monolayers, both in rodent and human models. Interestingly, leukocyte as well as endothelial CD81 was involved in this inhibitory effect. To assess their therapeutic potential, CD81 mAb were administered to mice suffering from experimental autoimmune encephalomyelitis (EAE). We found that Eat2, but not 2F7 mAb directed against mouse CD81 significantly reduced the development of neurological symptoms of EAE when using a preventive approach. Concomitantly, Eat2 treated animals showed reduced inflammation in the spinal cord. We conclude that CD81 represents a potential therapeutic target to interfere with leukocyte infiltration and ameliorate inflammatory neurological damage in MS.
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MESH Headings
- Animals
- Antibodies, Monoclonal/pharmacology
- Antibodies, Monoclonal/therapeutic use
- Antigens, CD/drug effects
- Antigens, CD/immunology
- Blood-Brain Barrier/drug effects
- Blood-Brain Barrier/immunology
- Cell Line, Transformed
- Cerebral Arteries/cytology
- Cerebral Arteries/drug effects
- Cerebral Arteries/immunology
- Chemotaxis, Leukocyte/drug effects
- Chemotaxis, Leukocyte/immunology
- Disease Models, Animal
- Encephalomyelitis, Autoimmune, Experimental/drug therapy
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/physiopathology
- Endothelial Cells/cytology
- Endothelial Cells/drug effects
- Endothelial Cells/immunology
- Female
- Humans
- Immunosuppression Therapy/methods
- Immunosuppressive Agents/pharmacology
- Immunosuppressive Agents/therapeutic use
- Mice
- Monocytes/drug effects
- Monocytes/immunology
- Multiple Sclerosis/drug therapy
- Multiple Sclerosis/immunology
- Multiple Sclerosis/physiopathology
- Rats
- Tetraspanin 28
- Treatment Outcome
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Affiliation(s)
- S Dijkstra
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands.
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van Heusden K, Gisolf J, Stok WJ, Dijkstra S, Karemaker JM. Mathematical modeling of gravitational effects on the circulation: importance of the time course of venous pooling and blood volume changes in the lungs. Am J Physiol Heart Circ Physiol 2006; 291:H2152-65. [PMID: 16632542 DOI: 10.1152/ajpheart.01268.2004] [Citation(s) in RCA: 36] [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] [Indexed: 11/22/2022]
Abstract
A dip in blood pressure (BP) in response to head-up tilt (HUT) or active standing might be due to rapid pooling in the veins below the heart (preload) or muscle activation-induced drop in systemic vascular resistance (afterload). We hypothesized that, in the cardiovascular response to passive HUT, where, in contrast to active standing, little BP dip is observed, features affecting the preload play a key role. We developed a baroreflex model combined with a lumped-parameter model of the circulation, including viscoelastic stress-relaxation of the systemic veins. Cardiac contraction is modeled using the varying-elastance concept. Gravity affects not only the systemic, but also the pulmonary, circulation. In accordance with the experimental results, model simulations do not show a BP dip on HUT; the tilt-back response is also realistic. If it is assumed that venous capacities are steady-state values, the introduction of stress-relaxation initially reduces venous pooling. The resulting time course of venous pooling is comparable to measured impedance changes. When venous pressure-volume dynamics are neglected, rapid (completed within 30 s) venous pooling leads to a drop in BP. The direct effect of gravity on the pulmonary circulation influences the BP response in the first ∼5 s after HUT and tilt back. In conclusion, the initial BP response to HUT is mainly determined by the response of the venous system. The time course of lower body pooling is essential in understanding the response to passive HUT.
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Affiliation(s)
- K van Heusden
- Dept. of Physiology, Rm. M01-216, Academic Medical Center, Univ. of Amsterdam, PO Box 22700, 1100 DE Amsterdam, The Netherlands
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Dijkstra S, Duis S, Pans IM, Lankhorst AJ, Hamers FPT, Veldman H, Bär PR, Gispen WH, Joosten EAJ, Geisert EE. Intraspinal administration of an antibody against CD81 enhances functional recovery and tissue sparing after experimental spinal cord injury. Exp Neurol 2006; 202:57-66. [PMID: 16806185 DOI: 10.1016/j.expneurol.2006.05.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Revised: 04/28/2006] [Accepted: 05/06/2006] [Indexed: 11/16/2022]
Abstract
We previously demonstrated that the tetraspanin protein CD81 is up-regulated by astrocytes and microglia after traumatic spinal cord injury in rats and that CD81 is involved in adhesion and proliferation of cultured astrocytes and microglia. Since these reactive glial cells contribute to secondary damage and glial scar formation, we studied the effect of local administration of an anti-CD81 antibody in experimental spinal cord injury. Adult rats were subjected to a moderate spinal cord contusion injury and treated for 2 weeks with different doses of the anti-CD81 antibody AMP1 (0.5-5 microg/h) or non-immune IgG (5.0 microg/h). A technique was developed to infuse the antibodies directly into the lesion site via an intraspinal cannula connected to a pump. Functional recovery was monitored during 8 postoperative weeks by means of the Basso, Beattie and Bresnahan (BBB) locomotor rating scale, the BBB subscore and Grid-walk test. At the end of the study, quantitative histology was performed to assess tissue sparing. Our data showed that by itself cannulation of the lesion site resulted in minimal functional and histological impairments. Application of 0.5 microg/h AMP1 resulted in a marked functional recovery (BBB 2 points; Grid-walk 30% less errors compared to control). This recovery was accompanied by an 18% increase in tissue sparing at the lesion epicentre. No gross histological changes in glial scarring were apparent. Our data demonstrate beneficial effects of an anti-CD81 antibody on functional recovery in spinal cord injured rats and suggest that this effect is mediated through a reduction in secondary tissue loss.
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Affiliation(s)
- S Dijkstra
- Department of Experimental Neurology, Rudolf Magnus Institute for Neuroscience, University Medical Center Utrecht, The Netherlands.
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Horstmann * M, Lorenz M, Watkowski A, Ioannidis G, Herzog O, King A, Evans DG, Hagen C, Schlieder C, Burn AM, King N, Petrie H, Dijkstra S, Crombie D. Automated interpretation and accessible presentation of technical diagrams for blind people. NEW REV HYPERMEDIA M 2004. [DOI: 10.1080/13614560512331326017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Dijkstra S, Berghout A, Sauerwein HP. [Prevalence of diabetes mellitus and cardiovascular disease among immigrants from Turkey and Morocco and the indigenous Dutch population]. Ned Tijdschr Geneeskd 2003; 147:2146-7. [PMID: 14619210] [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: 04/27/2023]
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Dijkstra S, Klok M, van Hoogenhuyze D, Sauerwein HP, Berghout A. Ischaemic heart disease in Turkish migrants with type 2 diabetes mellitus in The Netherlands: wait for the next generation? Neth J Med 2002; 60:434-7. [PMID: 12685491] [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: 03/01/2023]
Abstract
OBJECTIVE To study the prevalence of ischaemic heart disease in Turkish and Surinam-Asian migrants with type 2 diabetes mellitus in the Netherlands as compared with Europeans. METHODS In a consecutive case-control study, 59 Turkish and 62 Surinam-Asian patients were compared with 185 Europeans referred to a diabetes clinic for treatment of type 2 diabetes in the period 1992 to 1998. Main outcome measures were ischaemic heart disease and its associated risk factors. RESULTS The prevalence of ischaemic heart disease was lower (9%) in the Turks (p < 0.02), but higher (29%) in the Surinam-Asians compared with the Europeans (23%). The Turks (52 +/- 10 years) and Surinam-Asians (46 +/- 12 years) were younger than the Europeans (64 +/- 11 years, p < 0.001). Body mass index was 32 +/- 5 (p < 0.001) in the Turks, 27 +/- 5 in the Surinam-Asians (p < 0.05) and 29 +/- 5 in the Europeans. Turkish patients smoked less (23%, p < 0.05) and used less alcohol (4%, p < 0.05) than the Europeans. Proteinuria was found in 24% of the Turks (p < 0.05), 37% of the Surinam-Asians (NS) and 46% of the Europeans. In univariate analysis ischaemic heart disease was related to Turkish origin, OR 0.34 (0.14-0.83) p < 0.02, to Surinam-Asian origin, OR 1.84 (1.00-3.38) p = 0.05, and smoking, OR 1.78 (1.18-2.68) p < 0.01. Other variables were not related to ischaemic heart disease. Multivariate analysis in a model with ethnicity and smoking showed significant relations between ischaemic heart disease and Turkish ethnicity, OR 0.19 (0.06-0.65) p = 0.007, Surinam-Asian origin, OR 2.77 (1.45-5.28) p = 0.002, and smoking, OR 1.79 (1.20-2.66) p = 0.004. CONCLUSION Type 2 diabetes mellitus in different ethnic groups results in a significant difference in incidence of ischaemic heart disease. The most remarkable finding is a low incidence of ischaemic heart disease in the Turkish patients with type 2 diabetes, independent of smoking. The high prevalence of ischaemic heart disease in young migrant Asians with diabetes is confirmed.
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Affiliation(s)
- S Dijkstra
- Department of Internal Medicine, Rijnmond Zuid Medical Centre, Groene Hilledijk 315, 3075 EA Rotterdam, The Netherlands
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Dijkstra S, Geisert EE, Dijkstra CD, Bär PR, Joosten EA. CD81 and microglial activation in vitro: proliferation, phagocytosis and nitric oxide production. J Neuroimmunol 2001; 114:151-9. [PMID: 11240026 DOI: 10.1016/s0165-5728(01)00240-5] [Citation(s) in RCA: 24] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
CD81 (TAPA), a member of the tetraspanin family of proteins, is upregulated by astrocytes and microglia after traumatic injury to the rat central nervous system (CNS). To further understand the role of CD81 in the microglial response to injury, we analysed the functional effects of a CD81 antibody, AMP1, on cultured rat microglia. We found that AMP1 suppressed microglial proliferation in a dose-dependent manner. Furthermore, AMP1 stimulated myelin phagocytosis, probably by opsonizing the myelin. The phagocytosis of latex beads, as well as the production of nitric oxide, were not significantly influenced by AMP1. These data indicate that CD81 is involved in an important subset of microglial effector functions after CNS injury.
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Affiliation(s)
- S Dijkstra
- Department of Experimental Neurology, UMC Utrecht, P.O. Box 85500, 3508 GA, Utrecht, The Netherlands.
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Eysink T, Dijkstra S, Kuper J. Cognitive processes in solving variants of computer-based problems used in logic teaching. Computers in Human Behavior 2001. [DOI: 10.1016/s0747-5632(00)00038-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dijkstra S, Geisert EE JR, Gispen WH, Bär PR, Joosten EA. Up-regulation of CD81 (target of the antiproliferative antibody; TAPA) by reactive microglia and astrocytes after spinal cord injury in the rat. J Comp Neurol 2000; 428:266-77. [PMID: 11064366 DOI: 10.1002/1096-9861(20001211)428:2<266::aid-cne6>3.0.co;2-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [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: 11/08/2022]
Abstract
We examined the expression of CD81 (also known as TAPA, or target of the antiproliferative antibody) after traumatic spinal cord injury in the rat. CD81, a member of the tetraspanin family of proteins, is thought to be involved in reactive gliosis. This is based on the antiproliferative and antiadhesive effects of antibodies against CD81 on cultured astrocytes, as well as its up-regulation after penetrating brain injury. CD81 expression following dorsal hemisection of the spinal cord was determined immunohistochemically at time points ranging from 1 day to 2 months postlesion (p.l.). In the unlesioned cord a low background level of CD81 was observed, with the exception of the ependyma of the central canal and the pia mater, which were strongly CD81-positive. One day p.l., CD81 was diffusely up-regulated in the spinal cord parenchyma surrounding the lesion site. From 3 days onward, intensely CD81-positive round cells entered the lesion site, completely filling it by 7 days p.l. Staining with the microglial markers OX-42 and Iba1 revealed that these cells were reactive microglia/macrophages. At this time, no significant CD81 expression by GFAP-positive reactive astrocytes was noted. From the second week onward, CD81 was gradually down-regulated; i.e., its spatial distribution became more restricted. The CD81-positive microglia/macrophages disappeared from the lesion site, leaving behind large cavities. After 2 months, astrocytes that formed the wall of these cavities were strongly CD81-positive. In addition, CD81 was present on reactive astrocytes in the dorsal funiculus distal from the lesion in degenerated white matter tracts. In conclusion, the spatiotemporal expression pattern of CD81 by reactive microglia and astrocytes indicates that CD81 is involved in the glial response to spinal cord injury.
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Affiliation(s)
- S Dijkstra
- Department of Experimental Neurology, RMI for Neurosciences, University Medical Centre, 3508 GA Utrecht, The Netherlands.
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Abstract
Scarring is suggested to impede axon regrowth across the lesion site in the injured adult mammalian central nervous system. Collagen Type IV, as a major component of the scar formed after injury, is an impediment for successful axonal regeneration and a decrease in its amount is a prerequisite for regrowing axons to cross the lesion in the postcommissural fornix in the injured adult rat (Stichel et al. [1999] Neurosci. 93:321-333). The aim of the present study was to analyze the relationship between collagen IV deposits and regrowing axons at various times after dorsal hemi-section of the adult rat spinal cord. Immunohistochemical double staining revealed that penetrating neurofilament-positive axons and collagen IV deposits were co-localized in the lesion site in the initial stages of axonal sprouting (between 7 and 14 days post-operatively) and were still present 1 and 2 months post-operatively. Interestingly, collagen IV-immunoreactive areas located around cystic cavities formed at the site of injury 1 month post-operatively, were devoid of axons. In conclusion, our observations indicate that collagen IV deposits after spinal cord injury do not prevent neurofilament-positive regrowing axons from penetrating the lesion site.
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Affiliation(s)
- E A Joosten
- Department of Neurology, Rudolf Magnus Institute for Neurosciences, Utrecht, The Netherlands.
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15
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Abstract
Corticospinal neurons were identified in primary cultures of cortical neurons established from rats that had been injected with a fluorescent tracer to retrogradely label the corticospinal tract. We measured neurite outgrowth from corticospinal neurons after they had been co-cultured with astrocytes derived from either the cerebral cortex (homotopic region) or spinal cord (target region) of postnatal rats. The axon length of corticospinal neurons was increased when they were cultured on astroglial monolayers compared to a control monolayer (fibroblasts). However, no difference in axon length was noted on cortical versus spinal cord-derived astrocytes. On the other hand, total dendritic length was increased on cortical compared to spinal cord astrocytes. This increase in total dendrite length was not the result of differences in the length of primary dendrites, but primarily of a higher number of dendrites and increased branching on the cortical astroglia. If the corticospinal neurons were co-cultured without physical contact with the astrocytes, axonal and dendritic outgrowth were not stimulated when compared to the fibroblast control. The data indicate that dendritic growth from corticospinal neurons is preferentially promoted by astrocytes from the cerebral cortex, whereas axonal growth is not influenced by the anatomical origin of the astrocytes. The impact of these findings on our understanding of the role of astrocytes in the development and regeneration of the corticospinal tract is discussed.
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Affiliation(s)
- S Dijkstra
- Department of Experimental Neurology, Rudolf Magnus Institute for Neurosciences, Utrecht University, The Netherlands
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Dijkstra S, Nieuwenhuys EJ, Swaak AJ. The prognosis and outcome of patients referred to an outpatient clinic for rheumatic diseases characterized by the presence of antinuclear antibodies (ANA). Scand J Rheumatol 1999; 28:33-7. [PMID: 10092162 DOI: 10.1080/03009749950155751] [Citation(s) in RCA: 18] [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: 10/16/2022]
Abstract
To evaluate if patients with symptoms related to the musculoskeletal system, characterized by the presence of ANA, are prone to develop SLE or other specific rheumatic diseases, a follow-up study was started to investigate all patients who for the first time visited the outpatient clinic of the Department of Rheumatology in the period from 1983 to 1986 and who had detectable ANA. Patients with anti-dsDNA antibodies were excluded from evaluation. In total 65 patients could be included in the study, with a mean duration of follow-up of 9.3 years (range 2-16 years). During follow-up a specific rheumatic diagnosis could be established in 38 patients, on 75% of the patients within 2 years of follow-up, and in 90% within 5 years. Five patients developed a non-rheumatic disease. For the remaining 22 patients, diagnosis was not conclusive. These patients without a conclusive diagnosis had a mild clinical picture, which remained stable during follow-up. In conclusion 58% of patients presented with rheumatic symptoms and detectable ANA developed an overt rheumatic disease, usually within the first 5 years of follow-up.
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Affiliation(s)
- S Dijkstra
- Department of Internal Medicine, Zuiderziekenhuis, Rotterdam, The Netherlands
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18
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Abstract
We describe six patients with non-insulin dependent (Type 2) diabetes mellitus (NIDDM) and thermal foot injury admitted to the Burn Centre in Rotterdam. They were all male with a mean age of 56.8 (range 47-63) years. The median patients' delay before admission was 27 (range 1-56) days. Five patients needed amputation. Healing of the wounds took a mean period of 9.5 (range 2-27) months. In two patients healing of the wounds took more than 1 year; these two patients also had recurrent foot burns. Neurological evaluation in four patients confirmed severe polyneuropathy and severe loss of heat pain, warmth, and cold sensation.
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Affiliation(s)
- S Dijkstra
- Department of Internal Medicine, Zuiderziekenhuis and Burn Centre, Rotterdam, The Netherlands
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19
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Dijkstra S, Stapert J, Boxma H, Wiggers T. Treatment of pathological fractures of the humeral shaft due to bone metastases: a comparison of intramedullary locking nail and plate osteosynthesis with adjunctive bone cement. Eur J Surg Oncol 1996; 22:621-6. [PMID: 9005151 DOI: 10.1016/s0748-7983(96)92450-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.2] [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: 02/03/2023] Open
Abstract
In a retrospective study 37 patients were surgically treated for 38 fractures (27 actual and 11 impending) caused by metastatic lesions of the humerus shaft. A comparison between plate osteosynthesis with bone cement (20 cases) and intramedullary nailing (18 cases) was made. There was no mortality related to the surgical procedure. The patients' survival rate was 61% after 3 months and 44% after 6 months; six were alive after 1 year. Overall, a subjective and objective relief of pain was achieved in 92% and 79%, respectively. Restoration of arm function was improved in 95%. The operative course was complicated in six patients after plate osteosynthesis (three local and three systemic complications) and in four patients after intramedullary nailing (one local and three systemic complications). Fixation failed in four patients, instability developed twice after intramedullary fixation without bipolar static locking. No significant difference in survival rate, pain relief, restoration of function and complications were associated with methods of treatment, or with operation of actual or impending pathological fractures. Despite the poor life expectancy our results indicate that intramedullary nailing with bipolar static locking and post-operative irradiation or plate osteosynthesis with bone cement for treatment of pathological (impending) fractures of the humerus shaft are safe ways to restore arm function and improve quality of life.
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Affiliation(s)
- S Dijkstra
- Department of Surgery of the South Municipal Hospital, Rotterdam, The Netherlands
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Berghout A, Dijkstra S. [Type II diabetes mellitus in Hindus; new manifestations of old disease pictures]. Ned Tijdschr Geneeskd 1995; 139:3-7. [PMID: 7830829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- A Berghout
- Zuiderziekenhuis, afd. Inwendige Geneeskunde, Rotterdam
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Leyssens A, Dijkstra S, Van Kerkhove E, Steels P. Mechanisms of K+ uptake across the basal membrane of malpighian tubules of Formica polyctena: the effect of ions and inhibitors. J Exp Biol 1994; 195:123-45. [PMID: 7964409 DOI: 10.1242/jeb.195.1.123] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In the presence of 6 mmol l-1 Ba2+, known to block the K+ channels in the basal membrane, a rise in bath [K+] ([K+]bl) induced an increase in intracellular K+ concentration ([K+]i) similar in amount and in time course to that obtained in the absence of Ba2+. The presence of active and passive (other than through K+ channels) K+ uptake mechanisms across the basal membrane was investigated in different bath K+ concentrations. Dihydro-ouabain (10(-3) mol l-1), a blocker of the Na+/K(+)-ATPase, tested in low bath [K+], and Sch28080 (10(-4) mol l-1), a K+/H(+)-ATPase inhibitor, were without effect on fluid secretion. Dihydro-ouabain was also without effect on electrical potential differences either in the absence or in the presence of Ba2+. Vanadate (10(-3) mol l-1), in contrast, strongly reduced fluid secretion not only in control solution but also in high-K+, Na(+)-free medium and reduced the transepithelial and the apical membrane potential differences but not the basal membrane potential difference of [K+]i. Omitting Na+ from the bathing medium, replacing Cl- by Br- or applying bumetanide (10(-5) mol l-1) inhibited fluid secretion only in a low-K+ (10 mmol l-1) medium. In 51 mmol l-1 [K+]bl, omitting Na+ was without effect and 10(-4) mol l-1 bumetanide was needed to inhibit secretion. Replacing Cl- by Br- stimulated fluid secretion at this K+ concentration. Bumetanide (10(-4) mol l-1) had no effect in 113 mmol l-1 [K+]bl. Bumetanide (10(-4) mol l-1) in 51 mmol l-1 [K+]bl did not affect membrane potentials, did not lower [K+]i and did not affect the rise in [K+]i observed on an increase in [K+]bl. The results were summarized in a model proposing that K+ channels play a dominant role in high-K+ (113 mmol l-1) bathing medium. A K+/Cl- cotransporter may become more important in 51 mmol l-1 [K+]bl and a K+/Na+/2Cl- cotransporter may gain in importance in 10 mmol l-1 [K+]bl. Active mechanisms for K+ uptake across the basal membrane seem to play no detectable role in sustaining fluid secretion. The response to vanadate might be due to an effect on the apical electrogenic H+ pump.
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Affiliation(s)
- A Leyssens
- Laboratory of Physiology, Limburgs Universitair Centrum, Diepenbeek, Belgium
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Dijkstra S, Lohrmann E, Van Kerkhove E, Steels P, Greger R. Effects of dinitrophenol on active-transport processes and cell membranes in the Malpighian tubule of Formica. Pflugers Arch 1994; 428:150-6. [PMID: 7971171 DOI: 10.1007/bf00374852] [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: 01/28/2023]
Abstract
In Formica Malpighian tubules KCl secretion is driven by a V-type H+ ATPase in the luminal membrane in parallel with a H+/K+ antiporter. The effect of the protonophore dinitrophenol (DNP) was investigated on the isolated, symmetrically perfused tubule. DNP was applied in two different concentrations: 0.2 mmol/l and 1 mmol/l. The effects were fast and rapidly reversible. The equivalent short-circuit current (Isc) was reduced significantly to respectively 25 +/- 3% Cn = 4) and -3 +/- 7% (n = 11) of the control value when 0.2 mmol/l or 1 mmol/l was added to the bath. When 1 mmol/l DNP was applied the transepithelial resistance (Rte) decreased significantly to 74 +/- 11% of the control value (n = 11), and the luminal over basolateral voltage divider ratio (VDR), providing an estimate of luminal over basolateral membrane resistance, decreased to 37 +/- 12% of the control (n = 6). A concentration of 1 mmol/l DNP was also applied from the lumen. The decrease in Isc was significant, but much less pronounced (74 +/- 5% of control; n = 6) and no significant changes in Rte and VDR were observed. It is argued that, when the concentration in the bath is high enough, DNP may cross the cell and have a protonophoric effect not only on the mitochondria but also across the luminal cell membrane explaining the drop in transepithelial and in relative luminal membrane resistance.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- S Dijkstra
- Fysiologie, Limburgs Universitair Centrum, Diepenbeek, Belgium
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Dijkstra S, Lohrmann E, Van Kerkhove E, Greger R. Characteristics of the luminal proton pump in malpighian tubules of the ant. Ren Physiol Biochem 1994; 17:27-39. [PMID: 7509501 DOI: 10.1159/000173785] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The active pump mechanisms involved in K+ secretion of the malpighian tubules of the ant and present in the luminal membrane were investigated on isolated, luminally perfused tubules of Formica. The specific blocker for vacuolar type ATPases, bafilomycin A1, was found to half-maximally inhibit secretion at a concentration of 10(-5) mol/l when added to the lumen. N-Ethylmaleimide reduced the calculated short circuit current (Isc) to 78 and 21% of control value when added at 5 x 10(-4) mol/l, respectively, to the lumen and the bath. Reducing luminal pH inhibited Isc with a half-maximal inhibition at a luminal pH of 4.5. Acidified omeprazole, Schering compound 28080 and vanadate (both 10(-3) and 10(-4) mol/l) inhibited Isc only partially. The present data suggest that the luminal membrane of ant malpighian tubules contains a H+ pump. This pump is only poorly bafilomycin-sensitive. Furthermore, additional active transport systems responsible for secretion may be present. Part of these results have been published as abstracts.
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Affiliation(s)
- S Dijkstra
- Limburgs Universitair Centrum, Diepenbeek, Belgium
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Dijkstra S, Dekker P. Inference processes in learning well-defined concepts. Acta Psychol (Amst) 1982. [DOI: 10.1016/0001-6918(82)90034-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Aikema S, Dijkstra S, Lukens J, Holwerda F, Jansma F, Klinge T. [Pregnancy toxemias]. Tijdschr Ziekenverpl 1970; 23:490-3. [PMID: 5199937] [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: 01/14/2023]
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van de Most van Spijk D, Dijkstra S, Jennekens FG. Maximum conduction velocity and range of conduction velocity in motor fibers of the deep peroneal nerve in patients with chronic renal insufficiency. Electroencephalogr Clin Neurophysiol 1969; 27:715. [PMID: 4187432 DOI: 10.1016/0013-4694(69)91382-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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