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van Beek, E.R. (author), Cohen, L.H. (author), Leroy, I.M. (author), Ebetino, F.H. (author), Löwik, C.W.G.M. (author), Papapoulos, S.E. (author), Gaubius Instituut TNO (author)Bisphosphonates (BPS) inhibit bone resorption and are divided into two classes according to their chemical structure and mechanism of action: nonnitrogen containing BPS such as etidronate and clodronate that are of low potency and inhibit osteoclast function via metabolism into toxic ATP-metabolites and nitrogen-containing BPS (NBPS), such as...article 2003
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TNO Preventie en Gezondheid (author), van der Slot, A.J. (author), Zuurmond, A.M. (author), Bardoel, A.F.J. (author), Wijmenga, C. (author), Pruijs, H.E.H. (author), Sillence, D.O. (author), Brinckmann, J. (author), Abraham, D.J. (author), Black, C.M. (author), Verzijl, N. (author), de Groot, J. (author), Hanemaaijer, R. (author), te Koppele, J.M. (author), Huizinga, T.W.J. (author), Bank, R.A. (author)The hallmark of fibrotic processes is an excessive accumulation of collagen. The deposited collagen shows an increase in pyridinoline cross-links, which are derived from hydroxylated lysine residues within the telopeptides. This change in cross-linking is related to irreversible accumulation of collagen in fibrotic tissues. The increase in...article 2003
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Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding (author), Valtueña, S. (author), Cashman, K. (author), Robins, S.P. (author), Cassidy, A. (author), Kardinaal, A. (author), Branca, F. (author)Research on the bone effects of natural phyto-oestrogens after menopause is at a relatively early stage. Published studies are few, difficult to compare and often inconclusive, due in part to design weaknesses. Currently, many questions remain to be answered including to what extent a safe daily intake may prevent postmenopausal bone loss. These...article 2003
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Huebner, J.L. (author), Hanes, M.A. (author), Beekman, B. (author), TeKoppele, J.M. (author), Kraus, V.B. (author), Gaubius Instituut (author)Objective: To evaluate the interaction of bone and cartilage in knee osteoarthritis (OA) pathogenesis in two guinea-pig strains with appreciable differences in bone metabolism. Design: Two guinea-pig strains were evaluated for their susceptibilities to OA using semi-quantitative histological grading of knee joints and quantification of...article 2002
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Brama, P.A.J. (author), TeKoppele, J.M. (author), Bank, R.A. (author), Barneveld, A. (author), van Weeren, P.R. (author), Gaubius instituut TNO (author)Subchondral bone provides structural support to the overlying articular cartilage, and plays an important role in osteochondral diseases. There is growing insight that the mechanical features of bone are related to the biochemistry of the collagen network and the mineral content. In the present study, part of the normal developmental process and...article 2002
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Marijnissen, A.C.A. (author), van Roermund, P.M. (author), Verzijl, N. (author), Tekoppele, J.M. (author), Bijlsma, J.W.J. (author), Lafeber, F.P.J.G. (author), TNO Preventie en Gezondheid (author)Objective: Recently we described a canine model of osteoarthritis (OA), the groove model with features of OA at 10 weeks after induction, identical to those seen in the canine anterior cruciate ligament transection (ACLT) model. This new model depends on cartilage damage accompanied by transient intensified loading of the affected joint. The...article 2002
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Verhoeven, A.C. (author), Boers, M. (author), te Koppele, J.M. (author), van der Laan, W.H. (author), Markusse, H.M. (author), Geusens, P. (author), van der Linden, S. (author), Gaubius Instituut (author)Objectives. Exploration of bone metabolism changes at different levels of disease activity, both with and without oral corticosteroid therapy, and prediction of changes in joint damage and bone density from the observed changes in markers of bone turnover. Methods. Data analysis from a randomized clinical trial with 155 rheumatoid arthritis (RA)...article 2001
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Wang, X. (author), Bank, R.A. (author), teKoppele, J.M. (author), Mauli Agrawal, C. (author), Gaubius Instituut (author)The hypothesis of this study was that collagen denaturation would lead to a significant decrease in the toughness of bone, but has little effect on the stiffness of bone. Using a heating model, effects of collagen denaturation on the biomechanical properties of human cadaveric bone were examined. Prior to testing, bone specimens were heat...article 2001
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Schuller, A.A. (author), Holst, D. (author), TNO Preventie en Gezondheid (author)Background: A number of epidemiological studies have shown that smoking is a risk factor for periodontal disease. Little is known about the relationship between smoking duration and alveolar bone loss. The purpose of this research was to describe the prevalence of alveolar bone loss according to smoking status in Norway. A dose-response model...article 2001
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Ronday, H.K. (author), van der Laan, W.H. (author), Tak, P.P. (author), de Roos, J.A.D.M. (author), Bank, R.A. (author), Tekoppele, J.M. (author), Froelich, C.J. (author), Hack, C.E. (author), Hogendoorn, P.C.W. (author), Breedveld, F.C. (author), Verheijen, J.H. (author), Gaubius Instituut (author)Objective. To investigate the cartilage-degrading capacity of granzyme B and the presence of granzyme B-positive cells at sites of erosion in the rheumatoid synovium. Methods. Granzyme B was added to [3H]proline/[35S]sulphate-labelled cartilage matrices and to cartilage explants. Proteoglycan degradation was assessed by the release of 35S and...article 2001
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van Vlijmen, B.J.M. (author), Gerritsen, G. (author), Franken, A.L. (author), Boesten, L.S.M. (author), Kockx, M.M. (author), Gijbels, M.J. (author), Vierboom, M.P. (author), van Eck, M. (author), van de Water, B. (author), van Berkel, T.J.C. (author), Havekes, L.M. (author), Gaubius Instituut TNO (author)Cell proliferation and cell death (either necrosis or apoptosis) are key processes in the progression of atherosclerosis. The tumor suppressor gene p53 is an essential gene in cell proliferation and cell death and is upregulated in human atherosclerotic plaques, both in smooth muscle cells and in macrophages. In the present study, we...article 2001
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Bank, R.A. (author), Tekoppele, J.M. (author), Janus, G.J.M. (author), Wassen, M.H.M. (author), Pruijs, H.E.H. (author), van der Sluijs, H.A.H. (author), Sakkers, R.J.B. (author)The brittleness of bone in patients with osteogenesis imperfecta (OI) has been attributed to an aberrant collagen network. However, the role of collagen in the loss of tissue integrity has not been well established. To gain an insight into the biochemistry and structure of the collagen network, the cross-links hydroxylysylpyridinoline (HP) and...article 2000
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van Eck, M. (author), de Winther, M.P.J. (author), Herijgers, N. (author), Havekes, L.M. (author), Hofker, M.H. (author), Groot, P.H.E. (author), van Berkel, T.J.C. (author), Gaubius Instituut TNO (author)In the arterial wall, scavenger receptor class A (SRA) is implicated in pathological lipid deposition. In contrast, in the liver, SRA is suggested to remove modified lipoproteins from the circulation, thereby protecting the body from their pathological action. The role of SRA on bone marrow-derived cells in lipid metabolism and atherogenesis was...article 2000
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van Eck, M. (author), Herijgers, N. (author), van Dijk, K.W. (author), Havekes, L.M. (author), Hofker, M.H. (author), Groot, P.H.E. (author), van Berkel, T.J.C. (author), Gaubius Instituut TNO (author)The effect of monocyte/macrophage-derived wild-type mouse apolipoprotein E (apoE), human apoE3-Leiden, and human apoE2 on serum cholesterol levels and the development of atherosclerosis in apoE-deficient (apoe-/-) mice was investigated by using bone marrow transplantation (BMT). At 4 weeks after BMT, murine apoe+/+ bone marrow reduced serum...article 2000
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Wassen, M.H.M. (author), Lammens, J. (author), Tekoppele, J.M. (author), Sakkers, R.J.B. (author), Liu, Z. (author), Verbout, A.J. (author), Bank, R.A. (author)Although >80% of the mineral in mammalian bone is present in the collagen fibrils, limited information is available about factors that determine a proper deposition of mineral. This study investigates whether a specific collagen matrix is required for fibril mineralization. Calcifying callus from dog tibias was obtained at various times (3-21...article 2000
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van den Heuvel, E.G.H.M. (author), Schoterman, M.H.C. (author), Muijs, T. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)The aim of this study was to investigate whether a product rich in transgalactooligosaccharides (TOS, Elix'or) stimulates true Ca absorption in postmenopausal women. The study was a double-blind, randomized crossover study, consisting of two 9-d treatment periods separated by a 19-d washout period. During the treatment periods, 12 subjects drank...article 2000
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Kardinaal, A.F.M. (author), Hoorneman, G. (author), Väänänen, K. (author), Charles, P. (author), Ando, S. (author), Maggiolini, M. (author), Charzewska, J. (author), Rotily, M. (author), Deloraine, A. (author), Heikkinen, J. (author), Juvin, R. (author), Schaafsma, G. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)Bone mass and bone geometry are considered to have independent effects on bone strength. The purpose of this study was to obtain data on bone mass and geometry in young female populations and how they are influenced by body size and lifestyle factors. In a cross-sectional, observational study in six European countries, 1116 healthy Caucasian...article 2000
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Gaubius Instituut TNO (author), Herijgers, N. (author), de Winther, M.P.J. (author), van Eck, M. (author), Havekes, L.M. (author), Hofker, M.H. (author), Hoogerbrugge, P.M. (author), van Berkel, T.J.C. (author)Scavenger receptors, which include various classes, play an important role in atherogenesis by mediating the unrestricted uptake of modified lipoproteins, resulting in the massive accumulation of cholesteryl esters. Because macrophage-derived foam cells are considered to be an important feature in early atherogenesis, we investigated the role of...article 2000
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Gaubius Instituut TNO (author), Wang, X. (author), Bank, R.A. (author), TeKoppele, J.M. (author), Hubbard, G.B. (author), Athanasiou, K.A. (author), Agrawal, C.M. (author)The purpose of this study was to explore the relationship between the integrity of collagen and biomechanical properties of bone. In this study, age (range, 5-26 years old) and gender related changes in cortical bone samples from 33 baboon femurs (15 males and 18 females) were examined. The percentage of denatured collagen was determined using a...article 2000
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Influence of development and joint pathology on stromelysin enzyme activity in equine synovial fluidTNO Preventie en Gezondheid (author), Brama, P.A.J. (author), TeKoppele, J.M. (author), Beekman, B. (author), van El, B. (author), Barneveld, A. (author), van Weeren, P.R. (author)Objective - To investigate the role of stromelysin (MMP-3) activity in synovial fluid (SF) at different stages of development and in common joint disorders in the horse. Methods - Stromelysin activity was determined with a fluorogenic enzyme activity assay in SF of normal joints of fetal, juvenile and adult horses, and in SF of horses suffering...article 2000