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Pons, D. (author), de Vries, F.R. (author), van den Elsen, P.J. (author), Heijmans, B.T. (author), Quax, P.H.A. (author), Jukema, J.W. (author), TNO Kwaliteit van Leven (author)
Significant progress has been made in the clinical management of a variety of cardiovascular diseases. Nevertheless, the therapeutic efficacy of the current treatment modalities for atherosclerosis and restenosis is not fully sufficient in a large proportion of patients. One of the major contributing factors is the clinical and biological...
article 2009
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Stone, O.A. (author), Richer, C. (author), Emanueli, C. (author), van Weel, V. (author), Quax, P.H.A. (author), Katare, R. (author), Kraenkel, N. (author), Campagnolo, P. (author), Barcelos, L.S. (author), Siragusa, M. (author), Sala-Newby, G.B. (author), Baldessari, D. (author), Mione, M. (author), Vincent, M.P. (author), Benest, A.V. (author), Al Haj Zen, A. (author), Gonzalez, J. (author), Bates, D.O. (author), Alhenc-Gelas, F. (author), Madeddu, P. (author), TNO Kwaliteit van Leven (author)
OBJECTIVE : Human Tissue Kallikrein (hKLK1) overexpression promotes an enduring neovascularization of ischemic tissue, yet the cellular mechanisms of hKLK1-induced arteriogenesis remain unknown. Furthermore, no previous study has compared the angiogenic potency of hKLK1, with its loss of function polymorphic variant, rs5515 (R53H), which...
article 2009
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van der Hoeven, B.L. (author), Pires, N.M.M. (author), Warda, H.M. (author), Putter, H. (author), Quax, P.H.A. (author), Schalij, M.J. (author), Jukema, J.W. (author), TNO Kwaliteit van Leven (author)
Diabetes mellitus (DM) is a strong predictor of in-stent restenosis. This may be due to a higher level of vascular inflammation. We hypothesized that diabetic patients will benefit from dexamethasone-eluting stents, since local inflammation and consequently neointimal growth are suppressed and no systemic side effects will occur. Methods: 21...
article 2008
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Kupreishvili, K. (author), ter Weeme, M. (author), Morré, S.A. (author), van den Brule, A.J.C. (author), Huybregts, M.A.J.M. (author), Quax, P.H.A. (author), ten Velden, J. (author), van Hinsbergh, V.W.M. (author), Stooker, W. (author), Eijsman, L. (author), Niessen, H.W.M. (author), TNO Kwaliteit van Leven (author)
Background: Several studies have suggested an association between Chlamydophila pneumoniae (Cp) infection and atherosclerosis. A recent study detected Cp DNA in the saphenous vein of 12% of all patients before bypass grafting and in 38% of failed grafts. We used a system in which human veins were perfused with autologous blood under arterial...
article 2008
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van Weel, V. (author), van Tongeren, R.B. (author), van Hinsbergh, V.W.M. (author), van Bockel, J.H. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
Stimulation of vascular growth to treat limb ischemia is promising, and early results obtained from uncontrolled clinical trials using angiogenic agents, e.g., vascular endothelial growth factor, led to high expectations. However, negative results from recent placebo-controlled trials warrant further research. Here, current insights into...
article 2008
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van Oostrom, M.C. (author), van Oostrom, O. (author), Quax, P.H.A. (author), Verhaar, M.C. (author), Hoefer, I.E. (author), TNO Kwaliteit van Leven (author)
Arteriogenesis, the enlargement of collateral vessels, seems a promising new target to improve blood flow to ischemic regions in patients suffering from cardiovascular conditions. With the growing knowledge of the mechanisms involved in arteriogenesis and the factors that influence the process, an increasing number of clinical trials are being...
article 2008
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Pons, D. (author), Monraats, P.S. (author), de Maat, M.P.M. (author), Pires, N.M.M. (author), Quax, P.H.A. (author), van Vlijmen, B.J.M. (author), Rosendaal, F.R. (author), Zwinderman, A.H. (author), Doevendans, P.A.F.M. (author), Waltenberger, J. (author), de Winter, R.J. (author), Tio, R.A. (author), Frants, R.R. (author), van der Laarse, A. (author), van der Wall, E.E. (author), Jukema, J.W. (author), TNO Kwaliteit van Leven (author)
Since activation of the haemostatic system is an important feature of the wound healing response triggered by arterial injury, variations in genes involved in thrombus formation may play a role in restenosis after percutaneous coronary interventions (PCI). Therefore, our aim was to examine the relationship between polymorphisms that are known to...
article 2007
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Monraats, P.S. (author), Kurreeman, F.A.S. (author), Pons, D. (author), Sewgobind, V.D.K.D. (author), de Vries, F.R. (author), Zwinderman, A.H. (author), de Maat, M.P.M. (author), Doevendans, P.A. (author), de Winter, R.J. (author), Tio, R.A. (author), Waltenberger, J. (author), Huizinga, T.W.J. (author), Eefting, D. (author), Quax, P.H.A. (author), Frants, R.R. (author), van der Laarse, A. (author), van der Wall, E.E. (author), Jukema, J.W. (author), TNO Kwaliteit van Leven (author)
Genetic factors appear to be important in the process of restenosis after percutaneous coronary intervention (PCI), as well as in inflammation, a pivotal factor in restenosis. An important mediator in the inflammatory response is interleukin (IL)-10. Our aim was to study whether genetic variants in IL-10 predispose to the risk of restenosis. The...
article 2007
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van Weel, V. (author), Seghers, L. (author), de Vries, M.R. (author), Kuiper, E.J. (author), Schlingemann, R.O. (author), Bajema, I.M. (author), Lindeman, J.H.N. (author), van Delis-Diemen, P.M. (author), van Hinsbergh, V.W.M. (author), van Bockel, J.H. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
OBJECTIVE - Vascular endothelial growth factor (VEGF)-induced stromal cell-derived factor-1 (SDF-1) has been implicated in angiogenesis in ischemic tissues by recruitment of CXCR4-positive bone marrow-derived circulating cells with paracrine functions in preclinical models. Here, evidence for this is provided in patients with peripheral artery...
article 2007
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Oude Nijhuis, M.M. (author), van Keulen, J.K. (author), Pasterkamp, G. (author), Quax, P.H. (author), de Kleijn, D.P.V. (author), TNO Kwaliteit van Leven (author)
Innate immunity is the first line of defence against invading micro-organisms. The family of Toll-like receptors (TLRs) recognizes pathogen-associated molecular patterns (PAMPs) that are carried by the invading micro-organisms. Infectious pathogens have been implicated to play an important role in atherosclerosis. Nowadays, evidence is...
article 2007
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Pires, N.M.M. (author), Pols, T.W.H. (author), de Vries, M.R. (author), van Tiel, C.M. (author), Bonta, P.I. (author), Vos, M. (author), Arkenbout, E.K. (author), Pannekoek, H. (author), Jukema, J.W. (author), Quax, P.H.A. (author), de Vries, C.J.M. (author), TNO Kwaliteit van Leven (author)
BACKGROUND - Restenosis is a common complication after percutaneous coronary interventions and is characterized by excessive proliferation of vascular smooth muscle cells (SMCs). We have shown that the nuclear receptor Nur77 protects against SMC-rich lesion formation, and it has been demonstrated that 6-mercaptopurine (6-MP) enhances Nur77...
article 2007
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Eefting, D. (author), Grimbergen, J.M. (author), de Vries, M.R. (author), van Weel, V. (author), Kaijzel, E.L. (author), Que, I. (author), Moon, R.T. (author), Löwik, C.W. (author), van Bockel, J.H. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
For the successful application of RNA interference in vivo, it is desired to achieve (local) delivery of small interfering RNAs (siRNAs) and long-term gene silencing. Nonviral electrodelivery is suitable to obtain local and prolonged expression of transgenes. By intramuscular electrodelivery of a plasmid in which two opposing human polymerase...
article 2007
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van Bezooijen, R.L. (author), Svensson, J.P. (author), Eefting, D. (author), Visser, A. (author), van der Horst, G. (author), Karperien, M. (author), Quax, P.H.A. (author), Vrieling, H. (author), Papapoulos, S.E. (author), ten Dijke, P. (author), Löwik, W.G.M.C. (author), TNO Kwaliteit van Leven (author)
Sclerostin is an osteocyte-derived negative regulator of bone formation. It inhibits BMP-stimulated bone formation both in vitro and in vivo but has no direct effect on BMP signaling. Instead, sclerostin inhibits Wnt signaling that is required for BMP-stimulated osteoblastic differentiation. Introduction: Sclerostin is a member of the Dan family...
article 2007
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Pires, N.M.M. (author), Jukema, J.W. (author), Daemen, M.J.A.P. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
In 2001, the first human study with drug-eluting stents (DES) was published showing a nearly complete abolition of restenosis by using a sirolimus-eluting stent. This success was very encouraging to test new compounds in combination with the DES platform. Nevertheless, several other anti-restenotic compounds have been used in human clinical...
article 2006
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Verhaagh, S. (author), de Jong, E. (author), Goudsmit, J. (author), Lecollinet, S. (author), Gillissen, G. (author), de Vries, M. (author), van Leuven, K. (author), Que, I. (author), Ouwehand, K. (author), Mintardjo, R. (author), Weverling, G.J. (author), Radošević, K. (author), Richardson, J. (author), Eloit, M. (author), Lowik, C. (author), Quax, P. (author), Havenga, M. (author), TNO Kwaliteit van Leven (author)
Wild-type strains of mice do not express CD46, a high-affinity receptor for human group B adenoviruses including type 35. Therefore, studies performed to date in mice using replication-incompetent Ad35 (rAd35) vaccine carriers may underestimate potency or result in altered vector distribution. Here, it is reported that CD46 transgenic mice (MYII...
article 2006
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Schepers, A. (author), de Vries, M.R. (author), van Leuven, C.J. (author), Grimbergen, J.M. (author), Holers, V.M. (author), Daha, M.R. (author), van Bockel, J.H. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
BACKGROUND - Venous bypass grafts may fail because of development of intimal hyperplasia and accelerated atherosclerosis. Inflammation plays a major role in these processes. Complement is an important part of the immune system and participates in the regulation of inflammation. The exact role of complement in the process of accelerated...
article 2006
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Schepers, A. (author), Pires, N.M.M. (author), Eefting, D. (author), de Vries, M.R. (author), van Bokel, J.H. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
Objective: The aim of this study was to assess whether the anti-inflammatory agent dexamethasone can inhibit vein graft thickening without the occurrence of serious side effects. Methods: Venous interposition grafting was performed in the common carotid artery of hypercholesterolemic ApoE3Leiden transgenic mice. Mice were treated with...
article 2006
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van Hinsbergh, V.W.M. (author), Engelse, M.A. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
Pericellular proteases play an important role in angiogenesis and vasculogenesis. They comprise (membrane-type) matrix metalloproteinases [(MT-)MMPs], serine proteases, cysteine cathepsins, and membrane-bound aminopeptidases. Specific inhibitors regulate them. Major roles in initiating angiogenesis have been attributed to MT1-matrix...
article 2006
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Schepers, A. (author), Eefting, D. (author), Bonta, P.I. (author), Grimbergen, J.M. (author), de Vries, M.R. (author), van Weel, V. (author), de Vries, C.J. (author), Egashira, K. (author), van Bockel, J.H. (author), Quax, P.H.A. (author), TNO Kwaliteit van Leven (author)
OBJECTIVE - Because late vein graft failure is caused by intimal hyperplasia (IH) and accelerated atherosclerosis, and these processes are thought to be inflammation driven, influx of monocytes is one of the first phenomena seen in IH, we would like to provide direct evidence for a role of the MCP-1 pathway in the development of vein graft...
article 2006
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Monraats, P.S. (author), Pires, N.M.M. (author), Agema, W.R.P. (author), Zwinderman, A.H. (author), Schepers, A. (author), de Maat, M.P.M. (author), Doevendans, P.A. (author), de Winter, R.J. (author), Tio, R.A. (author), Waltenberger, J. (author), Frants, R.R. (author), Quax, P.H.A. (author), van Vlijmen, B.J.M. (author), Atsma, D.E. (author), van der Laarse, A. (author), van der Wall, E.E. (author), Jukema, J.W. (author), TNO Kwaliteit van Leven (author)
Background - Restenosis is a negative effect of percutaneous coronary intervention (PCI). No clinical factors are available that allow good risk stratification. However, evidence exists that genetic factors are important in the restenotic process as well as in the process of inflammation, a pivotal factor in restenosis. Association studies have...
article 2005
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