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232 results on '"Niessen, H. W."'

51. Topical vascular endothelial growth factor in rabbit tracheal surgery:comparative effect on healing using various reconstruction materials and intraluminal stents

Author

Dodge-Khatami, A, Niessen, H W M, Baidoshvili, A, van Gulik, T M, Klein, M G, Eijsman, L, and de Mol, B A J M

Abstract

OBJECTIVES: The effect of topical vascular endothelial growth factor (VEGF) on post-surgical tracheal healing using various reconstruction materials was studied, with particular regard to prevention of granulation tissue or fibrosis.METHODS: Twenty-four New Zealand White rabbits underwent survival surgery using autograft patches (n=6), xenopericardium patches (n=6), intraluminal Palmaz wire stents (n=6), and controls (n=6). Autograft and pericardial half-patches were soaked in topical VEGF (5 microg/ml over 30 min) and saline before reimplantation. Stents and controls received circumferential injections of VEGF and saline in the tracheal wall. At 1-4 months postoperatively, specimens of sacrificed animals were stained with anti-VEGF antibody, followed by morphological and immunohistochemical examination.RESULTS: Rabbits with autografts and controls fared well until planned sacrifice. After xenopericardium repair, obstructive intraluminal granulation tissue led to early sacrifice in three rabbits. Stent insertion led to earlier death from airway obstruction in all six rabbits. Topical VEGF reduced granulation tissue after pericardial repair and fibrosis in all repairs except in stents. Remarkably, VEGF-pretreated half-patches and saline half-patches stained similarly high for VEGF, suggesting also local production of VEGF, probably in plasmacells, and in submucosal glands.CONCLUSIONS: Autograft repair induces the least granulation tissue and fibrosis, and the best healing pattern. Stents rapidly induced critical airway obstruction, unhindered by VEGF, leading to premature death. Tracheal pretreatment with topical VEGF reduces postoperative fibrosis after autograft and pericardial patch repairs, and reduces granulation tissue after xenopericardium repair. In time, VEGF is probably locally produced, although its potential role in tracheal healing remains to be established.

Published
2003

54. Decreased smooth muscle cell/extracellular matrix ratio of media of femoral artery in patients with atherosclerosis and hyperhomocysteinemia

Author

Vermeulen, E G, Niessen, H W, Bogels, M, Stehouwer, C D, Rauwerda, J A, van Hinsbergh, V W, Surgery, Pathology, Cardio-thoracic surgery, ACS - Heart failure & arrhythmias, AGEM - Digestive immunity, Amsterdam Neuroscience - Cellular & Molecular Mechanisms, CCA - Target Discovery & Preclinial Therapy Development, AII - Inflammatory diseases, and Physiology

Abstract

The aim of this study was to determine whether the morphology of the muscular femoral artery in patients with atherosclerosis and hyperhomocysteinemia differs from that of atherosclerotic vessels from patients with normal homocysteine levels. Whole-vessel biopsies of the superficial femoral artery were taken from patients with symptomatic atherosclerotic disease with and without hyperhomocysteinemia and from patients without atherosclerosis from traumatic amputations. The morphology of these specimens was studied qualitatively by light and electron microscopy and quantitatively by light microscopy in combination with a video overlay system. Atherosclerotic lesions in patients with hyperhomocysteinemia were morphologically similar to those in patients with normal homocysteine levels, except for a significantly decreased smooth muscle cell/extracellular matrix ratio of the media in hyperhomocysteinemic patients (P=0.02 versus normohomocysteinemic atherosclerotic group and P=0.001 versus group without a history of cardiovascular disease). Hyperhomocysteinemia is associated with a significant decrease of the smooth muscle cell/extracellular matrix ratio of the media of muscular femoral arteries without significant changes in medial thickness. Further investigations should concentrate on the cause of this newly discovered phenomenon and its impact on vascular compliance.

Published
2001

57. C-reactive protein as a cardiovascular risk factor:more than an epiphenomenon?

Author

Lagrand, W K, Visser, C A, Hermens, W T, Niessen, H W, Verheugt, F W, Wolbink, G J, and Hack, C E

Abstract

BACKGROUND: Circulating levels of C-reactive protein (CRP) may constitute an independent risk factor for cardiovascular disease. How CRP as a risk factor is involved in cardiovascular disease is still unclear.METHODS AND RESULTS: By reviewing available studies, we discuss explanations for the associations between CRP and cardiovascular disease. CRP levels within the upper quartile/quintile of the normal range constitute an increased risk for cardiovascular events, both in apparently healthy persons and in persons with preexisting angina pectoris. High CRP responses after acute myocardial infarction indicate an unfavorable outcome, even after correction for other risk factors. This link between CRP and cardiovascular disease has been considered to reflect the response of the body to the inflammatory reactions in the atherosclerotic (coronary) vessels and adjacent myocardium. However, because CRP localizes in infarcted myocardium (with colocalization of activated complement), we hypothesize that CRP may directly interact with atherosclerotic vessels or ischemic myocardium by activation of the complement system, thereby promoting inflammation and thrombosis.CONCLUSIONS: CRP constitutes an independent cardiovascular risk factor. Unraveling the molecular background of this association may provide new directions for prevention of cardiovascular events.

Published
1999

58. C-reactive protein as a cardiovascular risk factor: more than an epiphenomenon?

Author

Lagrand, W. K., Visser, C. A., Hermens, W. T., Niessen, H. W., Verheugt, F. W., Wolbink, G. J., Hack, C. E., and Other departments

Abstract

BACKGROUND: Circulating levels of C-reactive protein (CRP) may constitute an independent risk factor for cardiovascular disease. How CRP as a risk factor is involved in cardiovascular disease is still unclear. METHODS AND RESULTS: By reviewing available studies, we discuss explanations for the associations between CRP and cardiovascular disease. CRP levels within the upper quartile/quintile of the normal range constitute an increased risk for cardiovascular events, both in apparently healthy persons and in persons with preexisting angina pectoris. High CRP responses after acute myocardial infarction indicate an unfavorable outcome, even after correction for other risk factors. This link between CRP and cardiovascular disease has been considered to reflect the response of the body to the inflammatory reactions in the atherosclerotic (coronary) vessels and adjacent myocardium. However, because CRP localizes in infarcted myocardium (with colocalization of activated complement), we hypothesize that CRP may directly interact with atherosclerotic vessels or ischemic myocardium by activation of the complement system, thereby promoting inflammation and thrombosis. CONCLUSIONS: CRP constitutes an independent cardiovascular risk factor. Unraveling the molecular background of this association may provide new directions for prevention of cardiovascular events

Published
1999

59. Monocyte subset accumulation in the human heart following acute myocardial infarction and the role of the spleen as monocyte reservoir

Author

van der Laan, A. M., primary, ter Horst, E. N., additional, Delewi, R., additional, Begieneman, M. P. V., additional, Krijnen, P. A. J., additional, Hirsch, A., additional, Lavaei, M., additional, Nahrendorf, M., additional, Horrevoets, A. J., additional, Niessen, H. W. M., additional, and Piek, J. J., additional

Published
2013
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63. Poster session 3

Author

Nanka, O., primary, Krejci, E., additional, Pesevski, Z., additional, Sedmera, D., additional, Smart, N., additional, Rossdeutsch, A., additional, Dube, K. N., additional, Riegler, J., additional, Price, A. N., additional, Taylor, A., additional, Muthurangu, V., additional, Turner, M., additional, Lythgoe, M. F., additional, Riley, P. R., additional, Kryvorot, S., additional, Vladimirskaya, T., additional, Shved, I., additional, Schwarzl, M., additional, Seiler, S., additional, Huber, S., additional, Steendijk, P., additional, Maechler, H., additional, Truschnig-Wilders, M., additional, Pieske, B., additional, Post, H., additional, Caprio, C., additional, Baldini, A., additional, Chiavacci, E., additional, Dolfi, L., additional, Verduci, L., additional, Meghini, F., additional, Cremisi, F., additional, Pitto, L., additional, Kuan, T.-C., additional, Chen, M.-C., additional, Yang, T.-H., additional, Wu, W.-T., additional, Lin, C. S., additional, Rai, H., additional, Kumar, S., additional, Sharma, A. K., additional, Mastana, S., additional, Kapoor, A., additional, Pandey, C. M., additional, Agrawal, S., additional, Sinha, N., additional, Orlowska-Baranowska, E. H., additional, Placha, G., additional, Gora, J., additional, Baranowski, R., additional, Abramczuk, E., additional, Hryniewiecki, T., additional, Gaciong, Z., additional, Verschuren, J. J. W., additional, Wessels, J. A. M., additional, Trompet, S., additional, Stott, D. J., additional, Sattar, N., additional, Buckley, B., additional, Guchelaar, H. J., additional, Jukema, J. W., additional, Gharanei, M., additional, Hussain, A., additional, Mee, C. J., additional, Maddock, H. L., additional, Wijnen, W. J., additional, Van Den Oever, S., additional, Van Der Made, I., additional, Hiller, M., additional, Tijsen, A. J., additional, Pinto, Y. M., additional, Creemers, E. E., additional, Nikulina, S. U. Y., additional, Chernova, A., additional, Petry, A., additional, Rzymski, T., additional, Kracun, D., additional, Riess, F., additional, Pike, L., additional, Harris, A. L., additional, Gorlach, A., additional, Katare, R., additional, Oikawa, A., additional, Riu, F., additional, Beltrami, A. P., additional, Cesseli, D., additional, Emanueli, C., additional, Madeddu, P., additional, Zaglia, T., additional, Milan, G., additional, Franzoso, M., additional, Pesce, P., additional, Sarais, C., additional, Sandri, M., additional, Mongillo, M., additional, Butler, T. J., additional, Seymour, A.-M. L., additional, Ashford, D., additional, Jaffre, F., additional, Bussen, M., additional, Flohrschutz, I., additional, Martin, G. R., additional, Engelhardt, S., additional, Kararigas, G., additional, Nguyen, B. T., additional, Jarry, H., additional, Regitz-Zagrosek, V., additional, Van Bilsen, M., additional, Daniels, A., additional, Munts, C., additional, Janssen, B. J. A., additional, Van Der Vusse, G. J., additional, Van Nieuwenhoven, F. A., additional, Montalvo, C., additional, Villar, A. V., additional, Merino, D., additional, Garcia, R., additional, Llano, M., additional, Ares, M., additional, Hurle, M. A., additional, Nistal, J. F., additional, Dembinska-Kiec, A., additional, Beata Kiec-Wilk, B. K. W., additional, Anna Polus, A. P., additional, Urszula Czech, U. C., additional, Tatiana Konovaleva, T. K., additional, Gerd Schmitz, G. S., additional, Bertrand, L., additional, Balteau, M., additional, Timmermans, A., additional, Viollet, B., additional, Sakamoto, K., additional, Feron, O., additional, Horman, S., additional, Vanoverschelde, J. L., additional, Beauloye, C., additional, De Meester, C., additional, Martinez, E., additional, Martin, R., additional, Miana, M., additional, Jurado, R., additional, Gomez-Hurtado, N., additional, Bartolome, M. V., additional, San Roman, J. A., additional, Lahera, V., additional, Nieto, M. L., additional, Cachofeiro, V., additional, Rochais, F., additional, Sturny, R., additional, Mesbah, K., additional, Miquerol, L., additional, Kelly, R. G., additional, Messaoudi, S., additional, Gravez, B., additional, Tarjus, A., additional, Pelloux, V., additional, Samuel, J. L., additional, Delcayre, C., additional, Launay, J. M., additional, Clement, K., additional, Farman, N., additional, Jaisser, F., additional, Hadyanto, L., additional, Castellani, C., additional, Vescovo, G., additional, Ravara, B., additional, Tavano, R., additional, Pozzobon, M., additional, De Coppi, P., additional, Papini, E., additional, Vettor, R., additional, Thiene, G., additional, Angelini, A., additional, Meloni, M., additional, Caporali, A., additional, Cesselli, D., additional, Fortunato, O., additional, Avolio, E., additional, Schindler, R., additional, Simrick, S., additional, Brand, T., additional, Smart, N. S., additional, Herman, A., additional, Roura Ferrer, S., additional, Rodriguez Bago, J., additional, Soler-Botija, C., additional, Pujal, J. M., additional, Galvez-Monton, C., additional, Prat-Vidal, C., additional, Llucia-Valldeperas, A., additional, Blanco, J., additional, Bayes-Genis, A., additional, Foldes, G., additional, Maxime, M., additional, Ali, N. N., additional, Schneider, M. D., additional, Harding, S. E., additional, Reni, C., additional, Mangialardi, G., additional, De Pauw, A., additional, Sekkali, B., additional, Friart, A., additional, Ding, H., additional, Graffeuil, A., additional, Catalucci, D., additional, Balligand, J. L., additional, Azibani, F., additional, Tournoux, F., additional, Schlossarek, S., additional, Polidano, E., additional, Fazal, L., additional, Merval, R., additional, Carrier, L., additional, Chatziantoniou, C., additional, Buyandelger, B., additional, Linke, W., additional, Zou, P., additional, Kostin, S., additional, Ku, C., additional, Felkin, L., additional, Birks, E., additional, Barton, P., additional, Sattler, M., additional, Knoell, R., additional, Schroder, K., additional, Benkhoff, S., additional, Shimokawa, H., additional, Grisk, O., additional, Brandes, R. P., additional, Parepa, I. R., additional, Mazilu, L., additional, Suceveanu, A. I., additional, Suceveanu, A., additional, Rusali, L., additional, Cojocaru, L., additional, Matei, L., additional, Toringhibel, M., additional, Craiu, E., additional, Pires, A. L., additional, Pinho, M., additional, Pinho, S., additional, Sena, C., additional, Seica, R., additional, Leite-Moreira, A., additional, Dabroi, F., additional, Schiaffino, S., additional, Kiseleva, E., additional, Krukov, N., additional, Nikitin, O., additional, Ardatova, L., additional, Mourouzis, I., additional, Pantos, C., additional, Kokkinos, A. D., additional, Cokkinos, D. V., additional, Scoditti, E., additional, Massaro, M., additional, Carluccio, M. A., additional, Pellegrino, M., additional, Calabriso, N., additional, Gastaldelli, A., additional, Storelli, C., additional, De Caterina, R., additional, Lindner, D., additional, Zietsch, C., additional, Schultheiss, H.-P., additional, Tschope, C., additional, Westermann, D., additional, Everaert, B. R., additional, Nijenhuis, V. J., additional, Reith, F. C. M., additional, Hoymans, V. Y., additional, Timmermans, J. P., additional, Vrints, C. J., additional, Simova, I., additional, Mateev, H., additional, Katova, T., additional, Haralanov, L., additional, Dimitrov, N., additional, Mironov, N., additional, Golitsyn, S. P., additional, Sokolov, S. F., additional, Yuricheva, Y. U. A., additional, Maikov, E. B., additional, Shlevkov, N. B., additional, Rosenstraukh, L. V., additional, Chazov, E. I., additional, Radosinska, J., additional, Knezl, V., additional, Benova, T., additional, Slezak, J., additional, Urban, L., additional, Tribulova, N., additional, Virag, L., additional, Kristof, A., additional, Kohajda, Z. S., additional, Szel, T., additional, Husti, Z., additional, Baczko, I., additional, Jost, N., additional, Varro, A., additional, Sarusi, A., additional, Farkas, A. S., additional, Orosz, S. Z., additional, Forster, T., additional, Farkas, A., additional, Zakhrabova-Zwiauer, O. M., additional, Hardziyenka, M., additional, Nieuwland, R., additional, Tan, H. L., additional, Raaijmakers, A. J. A., additional, Bourgonje, V. J. A., additional, Kok, G. J. M., additional, Van Veen, A. A. B., additional, Anderson, M. E., additional, Vos, M. A., additional, Bierhuizen, M. F. A., additional, Benes, J., additional, Sebestova, B., additional, Ghouri, I. A., additional, Kemi, O. J., additional, Kelly, A., additional, Burton, F. L., additional, Smith, G. L., additional, Ozdemir, S., additional, Acsai, K., additional, Doisne, N., additional, Van Der Nagel, R., additional, Beekman, H. D. M., additional, Van Veen, T. A. B., additional, Sipido, K. R., additional, Antoons, G., additional, Harmer, S. C., additional, Mohal, J. S., additional, Kemp, D., additional, Tinker, A., additional, Beech, D., additional, Burley, D. S., additional, Cox, C. D., additional, Wann, K. T., additional, Baxter, G. F., additional, Wilders, R., additional, Verkerk, A., additional, Fragkiadaki, P., additional, Germanakis, G., additional, Tsarouchas, K., additional, Tsitsimpikou, C., additional, Tsardi, M., additional, George, D., additional, Tsatsakis, A., additional, Rodrigues, P., additional, Barros, C., additional, Najmi, A. K., additional, Khan, V., additional, Akhtar, M., additional, Pillai, K. K., additional, Mujeeb, M., additional, Aqil, M., additional, Bayliss, C. R., additional, Messer, A. E., additional, Leung, M.-C., additional, Ward, D., additional, Van Der Velden, J., additional, Poggesi, C., additional, Redwood, C. S., additional, Marston, S., additional, Vite, A., additional, Gandjbakhch, E., additional, Gary, F., additional, Fressart, V., additional, Leprince, P., additional, Fontaine, G., additional, Komajda, M., additional, Charron, P., additional, Villard, E., additional, Falcao-Pires, I., additional, Gavina, C., additional, Hamdani, N., additional, Stienen, G. J. M., additional, Niessens, H. W. M., additional, Leite-Moreira, A. F., additional, Paulus, W. J., additional, Memo, M., additional, Marston, S. B., additional, Vafiadaki, E., additional, Qian, J., additional, Arvanitis, D. A., additional, Sanoudou, D., additional, Kranias, E. G., additional, Elmstedt, N., additional, Lind, B., additional, Ferm-Widlund, K., additional, Westgren, M., additional, Brodin, L.-A., additional, Mansfield, C., additional, West, T., additional, Ferenczi, M., additional, Wijnker, P. J. M., additional, Foster, D. B., additional, Coulter, A., additional, Frazier, A., additional, Murphy, A. M., additional, Shah, M., additional, Sikkel, M. B., additional, Desplantez, T., additional, Collins, T. P., additional, O' Gara, P., additional, Lyon, A. R., additional, Macleod, K. T., additional, Ottesen, A. H., additional, Louch, W. E., additional, Carlson, C., additional, Landsverk, O. J. B., additional, Stridsberg, M., additional, Sjaastad, I., additional, Oie, E., additional, Omland, T., additional, Christensen, G., additional, Rosjo, H., additional, Cartledge, J., additional, Clark, L. A., additional, Ibrahim, M., additional, Siedlecka, U., additional, Navaratnarajah, M., additional, Yacoub, M. H., additional, Camelliti, P., additional, Terracciano, C. M., additional, Chester, A., additional, Gonzalez-Tendero, A., additional, Torre, I., additional, Garcia-Garcia, F., additional, Dopazo, J., additional, Gratacos, E., additional, Taylor, D., additional, Bhandari, S., additional, Seymour, A.-M., additional, Fliegner, D., additional, Jost, J., additional, Bugger, H., additional, Ventura-Clapier, R., additional, Carpi, A., additional, Campesan, M., additional, Canton, M., additional, Menabo, R., additional, Pelicci, P. G., additional, Giorgio, M., additional, Di Lisa, F., additional, Hancock, M., additional, Venturini, A., additional, Al-Shanti, N., additional, Stewart, C., additional, Ascione, R., additional, Angelini, G., additional, Suleiman, M.-S., additional, Kravchuk, E., additional, Grineva, E., additional, Galagudza, M., additional, Kostareva, A., additional, Bairamov, A., additional, Krychtiuk, K. A., additional, Watzke, L., additional, Kaun, C., additional, Demyanets, S., additional, Pisoni, J., additional, Kastl, S. P., additional, Huber, K., additional, Maurer, G., additional, Wojta, J., additional, Speidl, W. S., additional, Varga, Z. V., additional, Farago, N., additional, Zvara, A., additional, Kocsis, G. F., additional, Pipicz, M., additional, Csonka, C., additional, Csont, T., additional, Puskas, G. L., additional, Ferdinandy, P., additional, Klevstigova, M., additional, Silhavy, J., additional, Manakov, D., additional, Papousek, F., additional, Novotny, J., additional, Pravenec, M., additional, Kolar, F., additional, Novakova, O., additional, Novak, F., additional, Neckar, J., additional, Barallobre-Barreiro, J., additional, Didangelos, A., additional, Yin, X., additional, Fernandez-Caggiano, M., additional, Drozdov, I., additional, Willeit, P., additional, Domenech, N., additional, Mayr, M., additional, Lemoine, S., additional, Allouche, S., additional, Coulbault, L., additional, Galera, P., additional, Gerard, J. L., additional, Hanouz, J. L., additional, Suveren, E., additional, Whiteman, M., additional, Studneva, I. M., additional, Pisarenko, O., additional, Shulzhenko, V., additional, Serebryakova, L., additional, Tskitishvili, O., additional, Timoshin, A., additional, Fauconnier, J., additional, Meli, A. C., additional, Thireau, J., additional, Roberge, S., additional, Lompre, A. M., additional, Jacotot, E., additional, Marks, A. M., additional, Lacampagne, A., additional, Dietel, B., additional, Altendorf, R., additional, Daniel, W. G., additional, Kollmar, R., additional, Garlichs, C. D., additional, Parente, V., additional, Balasso, S., additional, Pompilio, G., additional, Colombo, G., additional, Milano, G., additional, Squadroni, L., additional, Cotelli, F., additional, Pozzoli, O., additional, Capogrossi, M. C., additional, Ajiro, Y., additional, Saegusa, N., additional, Iwade, K., additional, Giles, W. R., additional, Stafforini, D. M., additional, Spitzer, K. W., additional, Sirohi, R., additional, Candilio, L., additional, Babu, G., additional, Roberts, N., additional, Lawrence, D., additional, Sheikh, A., additional, Kolvekar, S., additional, Yap, J., additional, Hausenloy, D. J., additional, Yellon, D. M., additional, Aslam, M., additional, Rohrbach, S., additional, Schlueter, K.-D., additional, Piper, H. M., additional, Noll, T., additional, Guenduez, D., additional, Malinova, L., additional, Ryabukho, V. P., additional, Lyakin, D. V., additional, Denisova, T. P., additional, Montoro-Garcia, S., additional, Shantsila, E., additional, Lip, G. Y. H., additional, Kalaska, B., additional, Sokolowska, E., additional, Kaminski, K., additional, Szczubialka, K., additional, Kramkowski, K., additional, Mogielnicki, A., additional, Nowakowska, M., additional, Buczko, W., additional, Stancheva, N., additional, Mekenyan, E., additional, Gospodinov, K., additional, Tisheva, S., additional, Darago, A., additional, Rutkai, I., additional, Kalasz, J., additional, Czikora, A., additional, Orosz, P., additional, Bjornson, H. D., additional, Edes, I., additional, Papp, Z., additional, Toth, A., additional, Riches, K., additional, Warburton, P., additional, O'regan, D. J., additional, Ball, S. G., additional, Turner, N. A., additional, Wood, I. C., additional, Porter, K. E., additional, Kogaki, S., additional, Ishida, H., additional, Nawa, N., additional, Takahashi, K., additional, Baden, H., additional, Ichimori, H., additional, Uchikawa, T., additional, Mihara, S., additional, Miura, K., additional, Ozono, K., additional, Lugano, R., additional, Padro, T., additional, Garcia-Arguinzonis, M., additional, Badimon, L., additional, Ferraro, F., additional, Viner, R., additional, Ho, J., additional, Cutler, D., additional, Matchkov, V., additional, Aalkjaer, C., additional, Krijnen, P. A. J., additional, Hahn, N. E., additional, Kholova, I., additional, Sipkens, J. A., additional, Van Alphen, F. P., additional, Simsek, S., additional, Schalkwijk, C. G., additional, Van Buul, J. D., additional, Van Hinsbergh, V. W. M., additional, Niessen, H. W. M., additional, Caro, C. G., additional, Seneviratne, A., additional, Monaco, C., additional, Hou, D., additional, Singh, J., additional, Gilson, P., additional, Burke, M. G., additional, Heraty, K. B., additional, Krams, R., additional, Coppola, G., additional, Albrecht, K., additional, Schgoer, W., additional, Wiedemann, D., additional, Bonaros, N., additional, Steger, C., additional, Theurl, M., additional, Stanzl, U., additional, Kirchmair, R., additional, Amadesi, S., additional, Spinetti, G., additional, Cangiano, E., additional, Valgimigli, M., additional, Miller, A. M., additional, Cardinali, A., additional, Vierlinger, K., additional, Pagano, G., additional, Liccardo, D., additional, Zincarelli, C., additional, Femminella, G. D., additional, Lymperopoulos, A., additional, De Lucia, C., additional, Koch, W. J., additional, Leosco, D., additional, Rengo, G., additional, Hinkel, R., additional, Husada, W., additional, Trenkwalder, T., additional, Di, Q., additional, Lee, S., additional, Petersen, B., additional, Bock-Marquette, I., additional, Niemann, H., additional, Di Maio, M., additional, Kupatt, C., additional, Nourian, M., additional, Yassin, Z., additional, Kelishadi, R., additional, Memarian, S. H., additional, Heidari, A., additional, Leuner, A., additional, Poitz, D. M., additional, Brunssen, C., additional, Ravens, U., additional, Strasser, R. H., additional, Morawietz, H., additional, Vogt, F., additional, Grahl, A., additional, Flege, C., additional, Marx, N., additional, Borinski, M., additional, De Geest, B., additional, Jacobs, F., additional, Muthuramu, I., additional, Gordts, S. C., additional, Van Craeyveld, E., additional, Herijgers, P., additional, Weinert, S., additional, Medunjanin, S., additional, Herold, J., additional, Schmeisser, A., additional, Braun-Dullaeus, R. C., additional, Wagner, A. H., additional, Moeller, K., additional, Adolph, O., additional, Schwarz, M., additional, Schwale, C., additional, Bruehl, C., additional, Nobiling, R., additional, Wieland, T., additional, Schneider, S. W., additional, Hecker, M., additional, Cross, A., additional, Strom, A., additional, Cole, J., additional, Goddard, M., additional, Hultgardh-Nilsson, A., additional, Nilsson, J., additional, Mauri, C., additional, Mitkovskaya, N. P., additional, Kurak, T. A., additional, Oganova, E. G., additional, Shkrebneva, E. I., additional, Kot, Z. H. N., additional, Statkevich, T. V., additional, Molica, F., additional, Burger, F., additional, Matter, C. M., additional, Thomas, A., additional, Staub, C., additional, Zimmer, A., additional, Cravatt, B., additional, Pacher, P., additional, Steffens, S., additional, Blanco, R., additional, Sarmiento, R., additional, Parisi, C., additional, Fandino, S., additional, Blanco, F., additional, Gigena, G., additional, Szarfer, J., additional, Rodriguez, A., additional, Garcia Escudero, A., additional, Riccitelli, M. A., additional, Wantha, S., additional, Simsekyilmaz, S., additional, Megens, R. T., additional, Van Zandvoort, M. A., additional, Liehn, E., additional, Zernecke, A., additional, Klee, D., additional, Weber, C., additional, Soehnlein, O., additional, Lima, L. M., additional, Carvalho, M. G., additional, Gomes, K. B., additional, Santos, I. R., additional, Sousa, M. O., additional, Morais, C. A. S., additional, Oliveira, S. H. V., additional, Gomes, I. F., additional, Brandao, F. C., additional, Lamego, M. R. 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P., additional, Roncon-Albuquerque, R., additional, Oyeyipo, I. P., additional, Olatunji, L. A., additional, Usman, T. O., additional, Olatunji, V. A., additional, Bacova, B., additional, Viczenczova, C., additional, Dosenko, V., additional, Goncalvesova, E., additional, Vanrooyen, J., additional, Maulik, S. K., additional, Seth, S., additional, Dinda, A. K., additional, Jaiswal, A., additional, Mearini, G., additional, Khajetoorians, D., additional, Kraemer, E., additional, Gedicke-Hornung, C., additional, Precigout, G., additional, Eschenhagen, T., additional, Voit, T., additional, Garcia, L., additional, Lorain, S., additional, Mendes-Ferreira, P., additional, Maia-Rocha, C., additional, Adao, R., additional, Cerqueira, R. J., additional, Mendes, M. J., additional, Castro-Chaves, P., additional, De Keulenaer, G. W., additional, Bras-Silva, C., additional, Ruiter, G., additional, Wong, Y. 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J., additional, Llacer, A., additional, Galasso, G., additional, Ferrara, N., additional, Akhmedov, A., additional, Klingenberg, R., additional, Brokopp, C., additional, Hof, D., additional, Zoller, S., additional, Corti, R., additional, Gay, S., additional, Von Eckardstein, A., additional, Hoerstrup, S. P., additional, Luescher, T. F., additional, Heijman, J., additional, Zaza, A., additional, Johnson, D. M., additional, Rudy, Y., additional, Peeters, R. L. M., additional, Volders, P. G. A., additional, Westra, R. L., additional, Fujita, S., additional, Okamoto, R., additional, Taniguchi, M., additional, Konishi, K., additional, Goto, I., additional, Sugimoto, K., additional, Nakamura, M., additional, Shiraki, K., additional, Buechler, C., additional, and Ito, M., additional

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2012
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64. Poster session 2

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Perez-Pomares, J. M., primary, Ruiz-Villalba, A., additional, Ziogas, A., additional, Segovia, J. C., additional, Ehrbar, M., additional, Munoz-Chapuli, R., additional, De La Rosa, A., additional, Dominguez, J. N., additional, Hove-Madsen, L., additional, Sankova, B., additional, Sedmera, D., additional, Franco, D., additional, Aranega Jimenez, A., additional, Babaeva, G., additional, Chizh, N., additional, Galchenko, S., additional, Sandomirsky, B., additional, Schwarzl, M., additional, Seiler, S., additional, Steendijk, P., additional, Huber, S., additional, Maechler, H., additional, Truschnig-Wilders, M., additional, Pieske, B., additional, Post, H., additional, Simrick, S., additional, Kreutzer, R., additional, Rao, C., additional, Terracciano, C. M., additional, Kirchhof, P., additional, Fabritz, L., additional, Brand, T., additional, Theveniau-Ruissy, M., additional, Parisot, P., additional, Francou, A., additional, Saint-Michel, E., additional, Mesbah, K., additional, Kelly, R. G., additional, Wu, H.-T., additional, Sie, S.-S., additional, Chen, C.-Y., additional, Kuan, T.-C., additional, Lin, C. S., additional, Ismailoglu, Z., additional, Guven, M., additional, Yakici, A., additional, Ata, Y., additional, Ozcan, S., additional, Yildirim, E., additional, Ongen, Z., additional, Miroshnikova, V., additional, Demina, E., additional, Rodygina, T., additional, Kurjanov, P., additional, Denisenko, A., additional, Schwarzman, A., additional, Rubanenko, A., additional, Shchukin, Y., additional, Germanov, A., additional, Goldbergova, M., additional, Parenica, J., additional, Lipkova, J., additional, Pavek, N., additional, Kala, P., additional, Poloczek, M., additional, Vasku, A., additional, Parenicova, I., additional, Spinar, J., additional, Gambacciani, C., additional, Chiavacci, E., additional, Evangelista, M., additional, Vesentini, N., additional, Kusmic, C., additional, Pitto, L., additional, Chernova, A., additional, Nikulina, S. U. Y., additional, Arvanitis, D. A., additional, Mourouzis, I., additional, Pantos, C., additional, Kranias, E. G., additional, Cokkinos, D. V., additional, Sanoudou, D., additional, Vladimirskaya, T. E., additional, Shved, I. A., additional, Kryvorot, S. G., additional, Schirmer, I. M., additional, Appukuttan, A., additional, Pott, L., additional, Jaquet, K., additional, Ladilov, Y., additional, Archer, C. R., additional, Bootman, M. D., additional, Roderick, H. L., additional, Fusco, A., additional, Sorriento, D., additional, Santulli, G., additional, Trimarco, B., additional, Iaccarino, G., additional, Hagenmueller, M., additional, Riffel, J., additional, Bernhold, E., additional, Katus, H. A., additional, Hardt, S. 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P., additional, Cioffi, S., additional, Bilio, M., additional, Martucciello, S., additional, Illingworth, E., additional, Caporali, A., additional, Shantikumar, S., additional, Marchetti, M., additional, Martelli, F., additional, Emanueli, C., additional, Meloni, M., additional, Al Haj Zen, A., additional, Sala-Newby, G., additional, Del Turco, S., additional, Saponaro, C., additional, Dario, B., additional, Sartini, S., additional, Menciassi, A., additional, Dario, P., additional, La Motta, C., additional, Basta, G., additional, Santiemma, V., additional, Bertone, C., additional, Rossi, F., additional, Michelon, E., additional, Bianco, M. J., additional, Castelli, A., additional, Shin, D. I., additional, Seung, K. B., additional, Seo, S. M., additional, Park, H. J., additional, Kim, P. J., additional, Baek, S. H., additional, Choi, Y. S., additional, Her, S. H., additional, Kim, D. B., additional, Lee, J. M., additional, Park, C. S., additional, Rocchiccioli, S., additional, Cecchettini, A., additional, Pelosi, G., additional, Citti, L., additional, Parodi, O., additional, Trivella, M. G., additional, Michel-Monigadon, D., additional, Burger, F., additional, Dunoyer-Geindre, S., additional, Pelli, G., additional, Cravatt, B., additional, Steffens, S., additional, Didangelos, A., additional, Mayr, U., additional, Yin, X., additional, Stegemann, C., additional, Shalhoub, J., additional, Davies, A. H., additional, Monaco, C., additional, Mayr, M., additional, Lypovetska, S., additional, Grytsenko, S., additional, Njerve, I. U., additional, Pettersen, A. A., additional, Opstad, T. B., additional, Bratseth, V., additional, Arnesen, H., additional, Seljeflot, I., additional, Dumitriu, I. E., additional, Baruah, P., additional, Antunes, R. F., additional, Kaski, J. C., additional, Trapero, I., additional, Benet, I., additional, Alguero, C., additional, Chaustre, F. J., additional, Mangold, A., additional, Puthenkalam, S., additional, Distelmaier, K., additional, Adlbrecht, C., additional, Lang, I. M., additional, Koizumi, T., additional, Inoue, I., additional, Komiyama, N., additional, Nishimura, S., additional, Korneeva, O. N., additional, Drapkina, O. M., additional, Fornai, L., additional, Angelini, A., additional, Kiss, A., additional, Giskes, F., additional, Eijkel, G., additional, Fedrigo, M., additional, Valente, M. L., additional, Thiene, G., additional, Heeren, R. M. A., additional, Padro, T., additional, Casani, L., additional, Suades, R., additional, Bertoni, B., additional, Carminati, R., additional, Carlini, V., additional, Pettinari, L., additional, Martinelli, C., additional, Gagliano, N., additional, Noppe, G., additional, Buchlin, P., additional, Marquet, N., additional, Baeyens, N., additional, Morel, N., additional, Baysa, A., additional, Sagave, J., additional, Dahl, C. P., additional, Gullestad, L., additional, Carpi, A., additional, Di Lisa, F., additional, Giorgio, M., additional, Vaage, J., additional, Valen, G., additional, Vafiadaki, E., additional, Papalouka, V., additional, Terzis, G., additional, Spengos, K., additional, Manta, P., additional, Gales, C., additional, Genet, G., additional, Dague, E., additional, Cazorla, O., additional, Payre, B., additional, Mias, C., additional, Ouille, A., additional, Lacampagne, A., additional, Pathak, A., additional, Senard, J. M., additional, Abonnenc, M., additional, Da Costa Martins, P., additional, Srivastava, S., additional, Gautel, M., additional, De Windt, L., additional, Comelli, L., additional, Lande, C., additional, Ucciferri, N., additional, Ikonen, L., additional, Vuorenpaa, H., additional, Kujala, K., additional, Sarkanen, J.-R., additional, Heinonen, T., additional, Ylikomi, T., additional, Aalto-Setala, K., additional, Capros, H., additional, Sprincean, N., additional, Usurelu, N., additional, Egorov, V., additional, Stratu, N., additional, Matchkov, V., additional, Bouzinova, E., additional, Moeller-Nielsen, N., additional, Wiborg, O., additional, Gutierrez, P. S., additional, Aparecida-Silva, R., additional, Borges, L. F., additional, Moreira, L. F. P., additional, Dias, R. R., additional, Kalil, J., additional, Stolf, N. A. G., additional, Zhou, W., additional, Suntharalingam, K., additional, Brand, N., additional, Vilar Compte, R., additional, Ying, L., additional, Bicknell, K., additional, Dannoura, A., additional, Dash, P., additional, Brooks, G., additional, Tsimafeyeu, I., additional, Tishova, Y., additional, Wynn, N., additional, Oyeyipo, I. P., additional, Olatunji, L. A., additional, Maegdefessel, L., additional, Azuma, J., additional, Toh, R., additional, Raaz, U., additional, Merk, D. R., additional, Deng, A., additional, Spin, J. M., additional, Tsao, P. S., additional, Tedeschi, L., additional, Taranta, M., additional, Naldi, I., additional, Grimaldi, S., additional, Cinti, C., additional, Bousquenaud, M., additional, Maskali, F., additional, Poussier, S., additional, Marie, P. Y., additional, Boutley, H., additional, Karcher, G., additional, Wagner, D. R., additional, Devaux, Y., additional, Torre, I., additional, Psilodimitrakopoulos, S., additional, Iruretagoiena, I., additional, Gonzalez-Tendero, A., additional, Artigas, D., additional, Loza-Alvarez, P., additional, Gratacos, E., additional, Amat-Roldan, I., additional, Murray, L., additional, Carberry, D. M., additional, Dunton, P., additional, Miles, M. J., additional, Suleiman, M.-S., additional, Kanesalingam, K., additional, Taylor, R., additional, Mc Collum, C. N., additional, Parniczky, A., additional, Solymar, M., additional, Porpaczy, A., additional, Miseta, A., additional, Lenkey, Z. S., additional, Szabados, S., additional, Cziraki, A., additional, Garai, J., additional, Myloslavska, I., additional, Menazza, S. M., additional, Canton, M. C., additional, Di Lisa, F. D. L., additional, Oliveira, S. H. V., additional, Morais, C. A. S., additional, Miranda, M. R., additional, Oliveira, T. T., additional, Lamego, M. R. A., additional, Lima, L. M., additional, Goncharova, N. S., additional, Naymushin, A. V., additional, Kazimli, A. V., additional, Moiseeva, O. M., additional, Carvalho, M. G., additional, Sabino, A. P., additional, Mota, A. P. L., additional, Sousa, M. O., additional, Niessner, A., additional, Richter, B., additional, Hohensinner, P. J., additional, Rychli, K., additional, Zorn, G., additional, Berger, R., additional, Moertl, D., additional, Pacher, R., additional, Wojta, J., additional, Huelsmann, M., additional, Kukharchik, G., additional, Nesterova, N., additional, Pavlova, A., additional, Gaykovaya, L., additional, Krapivka, N., additional, Konstantinova, I., additional, Sichinava, L., additional, Prapa, S., additional, Mccarthy, K. P., additional, Kilner, P. J., additional, Xu, X. Y., additional, Johnson, M. R., additional, Ho, S. Y., additional, Gatzoulis, M. A., additional, Stoupel, E. G., additional, Garcia, R., additional, Merino, D., additional, Montalvo, C., additional, Hurle, M. A., additional, Nistal, J. F., additional, Villar, A. V., additional, Perez-Moreno, A., additional, Gilabert, R., additional, and Ros, E., additional

Published
2012
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65. Role of protein phosphorylation in the degranulation of electropermeabilized human neutrophils

Author

Niessen, H W, Verhoeven, A J, Pathology, Cardio-thoracic surgery, ACS - Heart failure & arrhythmias, AGEM - Digestive immunity, Amsterdam Neuroscience - Cellular & Molecular Mechanisms, CCA - Target Discovery & Preclinial Therapy Development, and AII - Inflammatory diseases

Subjects
macromolecular substances
Abstract

We have studied the role of protein phosphorylation in the degranulation response of human neutrophils by measuring the effect of ATP depletion and the addition of the protein kinase inhibitor staurosporine in electropermeabilized human neutrophils, activated with Ca2+ and/or GTP-gamma-S. Our studies were carried out in the presence of cytochalasin B to prevent inhibitory effects of actin polymerization on the degranulation response. It was found that protein phosphorylation plays an important role in the degranulation response in cells stimulated with the single stimuli Ca2+ or GTP-gamma-S. However, in neutrophils stimulated with the combination of these activators degranulation can occur without the apparent need for protein phosphorylation, albeit with a slower rate than with protein phosphorylation.

Published
1994

66. Fluoride prevents degranulation of the azurophilic and specific granules in electropermeabilized neutrophils

Author

Niessen, H W, Kessels, G C, Verhoeven, A J, Pathology, Cardio-thoracic surgery, ACS - Heart failure & arrhythmias, AGEM - Digestive immunity, Amsterdam Neuroscience - Cellular & Molecular Mechanisms, CCA - Target Discovery & Preclinial Therapy Development, and AII - Inflammatory diseases

Abstract

The effect of AlF4- on the degranulation process in human neutrophils was investigated. In intact neutrophils, AlF4- induced degranulation, whereas in electropermeabilized neutrophils AlF4- did not stimulate degranulation. In electropermeabilized neutrophils, fluoride ions proved to be inhibitory for the degranulation induced by addition of Ca2+ and/or GTP-gamma-S. Another phosphatase inhibitor, okadaic acid, inhibited degranulation induced by Ca2+ or by GTP-gamma-S but not degranulation induced by the combination of Ca2+ plus GTP-gamma-S. It is concluded that under suboptimal conditions of stimulation with Ca2+ or GTP-gamma-S, protein dephosphorylation plays an important role in the degranulation response in human neutrophils.

Published
1994

67. Immunoelectron microscopy reveals significant granule fusion upon stimulation of electropermeabilized human neutrophils

Author

Niessen, H W, Onderwater, J J, Koerten, H K, Ginsel, L A, Verhoeven, A J, Pathology, Cardio-thoracic surgery, ACS - Heart failure & arrhythmias, AGEM - Digestive immunity, Amsterdam Neuroscience - Cellular & Molecular Mechanisms, CCA - Target Discovery & Preclinial Therapy Development, and AII - Inflammatory diseases

Abstract

Although electropermeabilization has become an important tool for studying the signal requirements of exocytosis, relatively little is known about the morphological changes accompanying this response in electropermeabilized cells. In this study, we determined that electropermeabilization of human neutrophils by itself caused only minor changes in the morphology as determined by transmission electron microscopy. The structure of the plasma membrane did not show detectable changes, whereas the cytoplasm was more electron lucent as compared to intact cells. Activation of intact neutrophils with formyl-methionyl-leucyl-phenylalanine (FMLP), in the presence of cytochalasin-B, caused the development of invaginations of the plasma membrane. In contrast, activation of electropermeabilized cells with 1 microM Ca2+ and/or 50 microM GTP-gamma-S caused the development of vacuoles that did not seem to be in contact (or had previously been in contact) with the extracellular environment. However, fusion of azurophilic and specific granules with these vacuoles clearly had taken place. The response characteristics of this fusion induced by Ca2+ and GTP-gamma-S were quite similar to those of the direct fusion of granules with the plasma membrane. We conclude that in electropermeabilized human neutrophils, two processes involving granule fusion can be distinguished. First, a direct fusion of granules with the plasma membrane. Secondly, the fusion of granules leading to the formation of vacuoles, not in contact with the extracellular space.

Published
1994

69. Differential up-regulation of specific and azurophilic granule membrane markers in electropermeabilized neutrophils

Author

Niessen, H W, Verhoeven, A J, Pathology, Cardio-thoracic surgery, ACS - Heart failure & arrhythmias, AGEM - Digestive immunity, Amsterdam Neuroscience - Cellular & Molecular Mechanisms, CCA - Target Discovery & Preclinial Therapy Development, and AII - Inflammatory diseases

Abstract

We have developed an alternative method to study the degranulation in electropermeabilized human neutrophils by measuring the up-regulation of the specific membrane markers CD63 (residing in the azurophilic granules of resting neutrophils) and CD67 (present in specific granules). The expression of these marker proteins was measured by the binding of specific antibodies to paraformaldehyde-fixed cells and subsequent flow cytometry. We first investigated whether the changes in CD63 and CD67 expression after stimulation of intact cells were comparable with earlier measurements of neutrophil degranulation, in which the release of soluble marker proteins was measured. These experiments indicated that this new method compares favourably with earlier studies, both with respect to kinetics and stimulus dependency. Subsequently, we applied this method (which does not include centrifugation of the cells) to study degranulation in electropermeabilized neutrophils. In permeabilized neutrophils, a clear up-regulation of the specific granule marker CD67 was observed upon incubation with a free Ca2+ concentration of 1 microM, a value of the cytosolic free Ca2+ concentration occurring in formylmethionyl-leucyl-phenylalanine (FMLP)-activated neutrophils. The azurophilic granule marker CD63 required GTP-gamma-S besides 1 microM Ca2+ for a significant up-regulation. Hence, our study indicates a different requirement for intracellular signals of the two main types of granules in human neutrophils.

Published
1992

72. Pulmonary embolism causes endomyocarditis in the human heart

Author

Begieneman, M P V, primary, van de Goot, F R W, additional, van der Bilt, I A C, additional, Noordegraaf, A V., additional, Spreeuwenberg, M D, additional, Paulus, W J, additional, van Hinsbergh, V W M, additional, Visser, F C, additional, and Niessen, H W M, additional

Published
2007
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75. Clusterin: a protective mediator for ischemic cardiomyocytes?

Author

Krijnen, P. A. J., primary, Cillessen, S. A. G. M., additional, Manoe, R., additional, Muller, A., additional, Visser, C. A., additional, Meijer, C. J. L. M., additional, Musters, R. J. P., additional, Hack, C. E., additional, Aarden, L. A., additional, and Niessen, H. W. M., additional

Published
2005
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78. Differentiation of human adipose-derived stem cells towards cardiomyocytes is facilitated by laminin.

Author

van Dijk, A., Niessen, H. W. M., Zandieh Doulabi, B., Visser, F. C., and van Milligen, F. J.

Subjects
ADIPOSE tissues, STEM cells, HEART cells, MYOCARDIAL infarction, CELL differentiation
Abstract

Adipose-derived stem cells (ASCs) are promising candidates for therapy in myocardial infarction (MI). However, the frequency of human ASCs that differentiate towards cardiomyocytes is low. We hypothesized that adherence to extracellular matrix molecules that are upregulated after MI might increase human stem cell differentiation towards cardiomyocytes. We analysed putative ASC differentiation on fibronectin-coated, laminin-coated and uncoated culture plates. Expression of cardiac markers in cells was analysed 1, 3 and 5 weeks after stimulation with 5-aza-2-deoxycytidine. After 1 week, mRNA expression of myosin light chain-2α (MLC-2α), an early marker in cardiomyocyte development, was increased significantly in treated cells, independent of coating. At 5 weeks, however, mRNA expression of the late cardiomyocyte development marker SERCA2α was only significantly increased in 5-aza-2-deoxycytidine-treated cells cultured on laminin. Significantly higher numbers of cells were immunopositive for MLC-2α in cultures of treated cells grown on laminin-coated wells, when compared with cultures of treated cells grown on uncoated wells, both at 1 week and at 5 weeks. Furthermore, after 3 weeks, significantly more α-actinin- and desmin-positive cells were detected after treatment with 5-aza-2-deoxycytidine, but only in uncoated wells. After 5 weeks, however, the number of desmin-positive cells was only significantly increased after treatment of cells with 5-aza-2-deoxycytidine and culture on laminin (61% positive cells). Thus, we have found that a high percentage of human ASCs can be differentiated towards cardiomyocytes; this effect can be improved by laminin, especially during late differentiation. [ABSTRACT FROM AUTHOR]

Published
2009
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79. Secretory type II phospholipase A2 in culprit coronary lesions is associated with myocardial infarction.

Author

Nijmeijer, R., Meuwissen, M., Krijnen, P. A. J., van der Wal, A., Piek, J. J., Visser, C. A., Hack, C. E., and Niessen, H. W. M.

Subjects
PHOSPHOLIPASE A2, MYOCARDIAL infarction, PRECANCEROUS conditions, ACUTE phase proteins, CORONARY arteries, IMMUNOHISTOCHEMISTRY, MACROPHAGES, SMOOTH muscle
Abstract

Background Secretory type-II phospholipase A2 (sPLA2-II) is a cardiovascular risk marker since higher levels of this acute phase protein imply an increased risk for coronary artery disease. Moreover, it is hypothesized that local activity of sPLA2-II in the atherosclerotic plaque facilitates an inflammatory response to induce plaque instability or rupture. We have studied the presence of sPLA2-II in culprit lesions in the coronary arteries of patients with acute myocardial infarction (AMI) or angina pectoris. Materials and methods We performed a histological examination of culprit lesions in 41 patients with stable (SAP) or unstable angina pectoris (UAP), or AMI using directed coronary atherectomy (DCA). Frozen slides were analysed immuno-histochemically for the presence of sPLA2-II, macrophages and smooth muscle cells. Immunopositive areas were calculated as a percentage of the total tissue area using image analysis software. Results Intracellular sPLA2-II was found in atherosclerotic lesions in the macrophages of the intima as well as in vascular smooth muscle cells. Next to this, extracellular sPLA2-II depositions were also found. These depositions were significantly more extensive in patients with AMI, i.e. 26%median[6%25th(percentile)–44%75th(percentile)] of the intima area, than in patients with SAP 0%median (0%25th–10%75th; P = 0·013) or UAP 0%median (0%25th–0%75th; P = 0·04). Conclusions Extracellular sPLA2-II is more abundantly present in atherosclerotic culprit lesions that have led to myocardial infarction. This suggests a role for extracellular sPLA2-II in the development of complications of atherosclerotic lesions in coronary arteries. [ABSTRACT FROM AUTHOR]

Published
2008
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84. Induction of a monocyte/macrophage phenotype switch by mesenchymal stem cells might contribute to improved infarct healing postacute myocardial infarction

Author

Ter Horst, E. N., Naaijkens, B. A., Paul Krijnen, Laan, A. M., Piek, J. J., Niessen, H. W. M., Pathology, ICaR - Ischemia and repair, Graduate School, Cardiology, and Amsterdam Cardiovascular Sciences

Subjects
cardiovascular diseases
Abstract

Inadequate healing following acute myocardial infarction (AMI) can lead to the development of heart failure. The ischemic myocardium triggers an inflammatory response that clears cell debris and initiates the onset of scar tissue formation. The duration and intensity of this inflammatory response have been linked to the cardiac functioning post-AMI. In order to diminish scar tissue formation and stimulate regeneration of cardiac tissue, mesenchymal stem cell (MSC) have been applied post-AMI and showed beneficial effects on cardiac function. However, other than the expected regeneration of cardiac tissue, modulation of the inflammatory response post-AMI, especially related to an effect on monocytes/macrophages, was recently found to be an important aspect of MSC therapy. In healing post-AMI, monocytes and macrophages are key players that can either stimulate or repress inflammation using different phenotypes. Increased levels of the proinflammatory phenotype have clinically been associated with poor cardiac functional outcome post-AMI. MSC have been suggested to switch the monocytes/macrophages phenotype into a more anti-inflammatory state and might therefore beneficially influence the duration and intensity of the inflammatory response and subsequent cardiac function post-AMI. To gain more insight into this effect of MSC, this review provides an overview of the most relevant studies regarding this modulatory effect of MSC on monocytes/macrophages including its mechanisms to improve cardiac functioning post-AMI.

88. Reduction of vascular leakage by imatinib is associated with preserved microcirculatory perfusion and reduced renal injury markers in a rat model of cardiopulmonary bypass.

Author

Koning, N. J., de Lange, F., van Meurs, M., Jongman, R. M., Ahmed, Y., Schwarte, L. A., van Nieuw Amerongen, G. P., Vonk, A. B. A., Niessen, H. W., Baufreton, C., and Boer, C.

Subjects
*IMATINIB, *CARDIOPULMONARY bypass, *MICROCIRCULATION disorders
Abstract

Background: Cardiopulmonary bypass during cardiac surgery leads to impaired microcirculatory perfusion. We hypothesized that vascular leakage is an important contributor to microcirculatory dysfunction. Imatinib, a tyrosine kinase inhibitor, has been shown to reduce vascular leakage in septic mice. We investigated whether prevention of vascular leakage using imatinib preserves microcirculatory perfusion and reduces organ injury markers in a rat model of cardiopulmonary bypass.Methods: Male Wistar rats underwent cardiopulmonary bypass after treatment with imatinib or vehicle (n=8 per group). Cremaster muscle microcirculatory perfusion and quadriceps microvascular oxygen saturation were measured using intravital microscopy and reflectance spectroscopy. Evans Blue extravasation was determined in separate experiments. Organ injury markers were determined in plasma, intestine, kidney, and lungs.Results: The onset of cardiopulmonary bypass decreased the number of perfused microvessels by 40% in the control group [9.4 (8.6-10.6) to 5.7 (4.8-6.2) per microscope field; P<0.001 vs baseline], whereas this reduction was not seen in the imatinib group. In the control group, the number of perfused capillaries remained low throughout the experiment, whilst perfusion remained normal after imatinib administration. Microvascular oxygen saturation was less impaired after imatinib treatment compared with controls. Imatinib reduced vascular leakage and decreased fluid resuscitation compared with control [3 (3-6) vs 12 ml (7-16); P=0.024]. Plasma neutrophil-gelatinase-associated-lipocalin concentrations were reduced by imatinib.Conclusions: Prevention of endothelial barrier dysfunction using imatinib preserved microcirculatory perfusion and oxygenation during and after cardiopulmonary bypass. Moreover, imatinib-induced protection of endothelial barrier integrity reduced fluid-resuscitation requirements and attenuated renal and pulmonary injury markers. [ABSTRACT FROM AUTHOR]

Published
2018
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89. Wistar rats from different suppliers have a different response in an acute myocardial infarction model.

Author

Naaijkens, B. A., van Dijk, A., Meinster, E., Kramer, K., Kamp, O., Krijnen, P. A. J., Niessen, H. W. M., and Juffermans, L. J. M.

Subjects
*MYOCARDIAL infarction, *LABORATORY rats, *HEART cells, *HEALTH status indicators, *ANIMAL models in research, *RAT physiology
Abstract

The Wistar rat is a commonly used strain for experimental animal models. Recently it was shown that results vary between studies using Wistar rats of different suppliers. Therefore we studied whether Wistar rats obtained from Harlan Laboratories (Ha, n = 24) and Charles River (CR, n = 22) had a different outcome in an acute myocardial infarction (AMI) model. AMI was induced in both Ha and CR Wistar rats by one operator. This resulted in a significantly higher survival rate for Ha (79.2 ± 10.2%) compared with CR rats (54.2 ± 10.2%, p < 0.05). Furthermore, CR rats had lost significantly more weight after 7 days (-5.9 ± 3.1%) compared with Ha rats (-0.8 ± 1.7%; p < 0.001), indicating a worse health status of the CR rats. Paradoxically, the induced infarct was smaller in CR rats (7.3 ± 3.6% of the heart) compared with Ha rats (12.1 ± 4.7%, p < 0.05). This indicates that CR rats were less sensitive for the cardiomyocyte damage subsequent to AMI induction, but remarkably showed more clinical side effects indicating that Wistar rats from two suppliers had a different response within the same AMI model. [ABSTRACT FROM AUTHOR]

Published
2014
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90. Autopsy after transcatheter aortic valve implantation.

Author

van Kesteren F, Wiegerinck EM, Rizzo S, Baan J Jr, Planken RN, von der Thüsen JH, Niessen HW, van Oosterhout MF, Pucci A, Thiene G, Basso C, Sheppard MN, Wassilew K, and van der Wal AC

Subjects
Aged, Aged, 80 and over, Autopsy, Female, Humans, Male, Retrospective Studies, Time Factors, Cause of Death, Transcatheter Aortic Valve Replacement mortality
Abstract

Autopsy after transcatheter aortic valve implantation (TAVI) is a new field of interest in cardiovascular pathology. To identify the cause of death, it is important to be familiar with specific findings related to the time interval between the procedure and death. We aimed to provide an overview of the autopsy findings in patients with TAVI in their medical history divided by the timing of death with specific interest in the added value of autopsy over a solely clinically determined cause of death. In 8 European centres, 72 cases with autopsy reports were available. Autopsies were divided according to the time interval of death and reports were analysed. In 32 patients who died ≤72 h postprocedure, mortality resulted from cardiogenic or haemorrhagic shock in 62.5 and 34.4%, respectively. In 31 patients with mortality >72 h to ≤30 days, cardiogenic shock was the cause of death in 51.6% followed by sepsis (22.6%) and respiratory failure (9.7%). Of the nine patients with death >30 days, 88.9% died of sepsis, caused by infective endocarditis in half of them. At total of 12 patients revealed cerebrovascular complications. Autopsy revealed unexpected findings in 61.1% and resulted in a partly or completely different cause of death as was clinically determined. Autopsy on patients who underwent TAVI reveals specific patterns of cardiovascular pathology that clearly relate to the time interval between TAVI and death and significantly adds to the clinical diagnosis. Our data support the role of autopsy including investigation of the cerebrum in the quickly evolving era of cardiac device technology.

Published
2017
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91. Development of a new therapeutic technique to direct stem cells to the infarcted heart using targeted microbubbles: StemBells.

Author

Woudstra L, Krijnen PA, Bogaards SJ, Meinster E, Emmens RW, Kokhuis TJ, Bollen IA, Baltzer H, Baart SM, Parbhudayal R, Helder MN, van Hinsbergh VW, Musters RJ, de Jong N, Kamp O, Niessen HW, van Dijk A, and Juffermans LJ

Subjects
Adipose Tissue cytology, Adipose Tissue metabolism, Administration, Intravenous, Animals, Antigens, CD metabolism, Antigens, Differentiation, Myelomonocytic metabolism, Cell Survival, Cells, Cultured, Disease Models, Animal, Echocardiography, Heart diagnostic imaging, Heart physiopathology, Humans, Macrophages metabolism, Macrophages pathology, Male, Myocardial Infarction metabolism, Myocardial Infarction pathology, Pilot Projects, Rats, Rats, Wistar, Sonication, Stem Cells cytology, Stem Cells metabolism, Microbubbles, Myocardial Infarction therapy, Stem Cell Transplantation methods
Abstract

Successful stem cell therapy after acute myocardial infarction (AMI) is hindered by lack of engraftment of sufficient stem cells at the site of injury. We designed a novel technique to overcome this problem by assembling stem cell-microbubble complexes, named 'StemBells'. StemBells were assembled through binding of dual-targeted microbubbles (~3μm) to adipose-derived stem cells (ASCs) via a CD90 antibody. StemBells were targeted to the infarct area via an ICAM-1 antibody on the microbubbles. StemBells were characterized microscopically and by flow cytometry. The effect of ultrasound on directing StemBells towards the vessel wall was demonstrated in an in vitro flow model. In a rat AMI-reperfusion model, StemBells or ASCs were injected one week post-infarction. A pilot study demonstrated feasibility of intravenous StemBell injection, resulting in localization in ICAM-1-positive infarct area three hours post-injection. In a functional study five weeks after injection of StemBells cardiac function was significantly improved compared with controls, as monitored by 2D-echocardiography. This functional improvement neither coincided with a reduction in infarct size as determined by histochemical analysis, nor with a change in anti- and pro-inflammatory macrophages. In conclusion, the StemBell technique is a novel and feasible method, able to improve cardiac function post-AMI in rats., (Copyright © 2016 The Authors. Published by Elsevier B.V. All rights reserved.)

Published
2016
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92. Adipose tissue-derived stromal cells acquire endothelial-like features upon reprogramming with SOX18.

Author

Fontijn RD, Favre J, Naaijkens BA, Meinster E, Paauw NJ, Ragghoe SL, Nauta TD, van den Broek MA, Weijers EM, Niessen HW, Koolwijk P, and Horrevoets AJ

Subjects
Cell Differentiation, Cell Movement drug effects, Cells, Cultured, Cellular Reprogramming, Chemotaxis drug effects, Endothelial Cells cytology, Genetic Vectors genetics, Genetic Vectors metabolism, Human Umbilical Vein Endothelial Cells, Humans, Matrix Metalloproteinase 7 metabolism, Microtubules chemistry, Microtubules metabolism, SOXF Transcription Factors genetics, Shear Strength, Stromal Cells cytology, Vascular Endothelial Growth Factor A pharmacology, Adipose Tissue cytology, Endothelial Cells metabolism, SOXF Transcription Factors metabolism, Stromal Cells metabolism
Abstract

Adipose tissue-derived stromal cells (ASC) form a rich source of autologous cells for use in regenerative medicine. In vitro induction of an endothelial phenotype may improve performance of ASCs in cardiovascular repair. Here, we report on an in vitro strategy using direct reprogramming of ASCs by means of ectopic expression of the endothelial-specific transcription factor SRY (sex determining region Y)-box18 (SOX18). SOX18 induces ASCs to express a set of genes involved in vascular patterning: MMP7, KDR, EFNB2, SEMA3G and CXCR4. Accordingly, SOX18 transduced ASCs reorganize under conditions of shear stress, display VEGF-induced chemotaxis and form tubular structures in 3D matrices in an MMP7-dependent manner. These in vitro findings provide insight into molecular and cellular processes downstream of SOX18 and show that reprogramming using SOX18 is sufficient to induce several endothelial-like features in ASCs., (Copyright © 2014. Published by Elsevier B.V.)

Published
2014
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93. Immunoglobulin M, C-reactive protein and complement activation in rat hepatic ischemia-reperfusion injury.

Author

Diepenhorst GM, de Graaf W, Niessen HW, van Vliet AK, Hack CE, and van Gulik TM

Subjects
Alanine Transaminase blood, Animals, Aspartate Aminotransferases blood, Hepatocytes immunology, Hepatocytes metabolism, Hepatocytes pathology, Interleukin-6 blood, Liver pathology, Male, Neutrophils immunology, Neutrophils pathology, Rats, Rats, Wistar, C-Reactive Protein metabolism, Complement Activation, Immunoglobulin M blood, Liver immunology, Liver injuries, Reperfusion Injury blood, Reperfusion Injury immunology
Abstract

Background: Ischemia-reperfusion (I/R) models have shown that C-reactive protein (CRP) and immunoglobulin M (IgM) are involved in complement activation. Binding of CRP and IgM to damaged cell membranes initiates complement activation and aggravates I/R injury in various organs. However, the time course of CRP- and IgM-mediated complement activation and the relation to hepatocellular injury and inflammation in liver I/R are unknown., Aim: To evaluate the time course of IgM- and CRP-related complement activation and the relation to hepatocellular injury and inflammation in a hepatic I/R rat model., Methods: Male Wistar rats were allocated to (1) five groups of animals exposed to 60 min of partial ischemia (70%) induced via clamping of the left segmental portal triad, followed by 0, 3, 6, 12 or 24 h of reperfusion (n = 6 in each group); (2) five groups of sham-operated animals with corresponding reperfusion times (n = 5), and (3) a control group sacrificed before ischemia (n = 5). Hepatocellular injury, inflammatory response, rat plasma CRP and IgM levels and immunohistochemical depositions of CRP, IgM and C3 were assessed for each group., Results: Histopathological injury scores of hematoxylin and eosin sections of ischemic liver lobes demonstrated increasing values throughout the reperfusion time with a peak at 12 h. Plasma aminotransferases (alanine aminotransferase and aspartate aminotransferase) significantly increased after 3 h of reperfusion, peaking at 6 h (3,100 ± 800 U/l; p < 0.05). Hepatic neutrophil influx significantly increased from 3 to 6 h of reperfusion (p < 0.05) and demonstrated the highest value at 12 h (1.1 ± 0.2 U/mg of protein). Plasma IL-6 levels in the ischemia groups showed peak values after 6 h of reperfusion, decreasing significantly thereafter (p < 0.05). Plasma CRP values reached highest levels after 3 h of reperfusion (mean 91 ± 5% of control pool), decreasing significantly thereafter. Rat IgM concentrations in plasma did not significantly change throughout the reperfusion time. Immunohistochemical depositions of IgM, CRP and C3 in ischemic lobes demonstrated a similar pattern in time, reaching maximum values at 12 h of reperfusion. The percentages of depositions of CRP and IgM were significantly correlated [r(S) = 0.569; p < 0.001; Spearman test]. The time course of C3 and CRP depositions throughout reperfusion and C3 and IgM staining were significantly similar [r(S) = 0.797 and r(S) = 0.656, respectively; p < 0.0001; ANOVA]., Conclusions: CRP and IgM depositions demonstrate a parallel time course throughout the reperfusion to hepatocellular damage, inflammatory response and activated complement deposition in this rat hepatic I/R model. Furthermore, the time course of CRP and IgM depositions was significantly similar to that of activated complement depositions., (© 2014 S. Karger AG, Basel.)

Published
2014
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94. Induction of a monocyte/macrophage phenotype switch by mesenchymal stem cells might contribute to improved infarct healing postacute myocardial infarction.

Author

Ter Horst EN, Naaijkens BA, Krijnen PA, Van Der Laan AM, Piek JJ, and Niessen HW

Subjects
Animals, Cicatrix, Heart Failure etiology, Heart Failure prevention & control, Humans, Inflammation physiopathology, Macrophages metabolism, Mesenchymal Stem Cells metabolism, Monocytes metabolism, Myocardial Infarction metabolism, Myocardial Infarction physiopathology, Phenotype, Time Factors, Inflammation therapy, Mesenchymal Stem Cell Transplantation methods, Myocardial Infarction therapy
Abstract

Inadequate healing following acute myocardial infarction (AMI) can lead to the development of heart failure. The ischemic myocardium triggers an inflammatory response that clears cell debris and initiates the onset of scar tissue formation. The duration and intensity of this inflammatory response have been linked to the cardiac functioning post-AMI. In order to diminish scar tissue formation and stimulate regeneration of cardiac tissue, mesenchymal stem cell (MSC) have been applied post-AMI and showed beneficial effects on cardiac function. However, other than the expected regeneration of cardiac tissue, modulation of the inflammatory response post-AMI, especially related to an effect on monocytes/macrophages, was recently found to be an important aspect of MSC therapy. In healing post-AMI, monocytes and macrophages are key players that can either stimulate or repress inflammation using different phenotypes. Increased levels of the proinflammatory phenotype have clinically been associated with poor cardiac functional outcome post-AMI. MSC have been suggested to switch the monocytes/macrophages phenotype into a more anti-inflammatory state and might therefore beneficially influence the duration and intensity of the inflammatory response and subsequent cardiac function post-AMI. To gain more insight into this effect of MSC, this review provides an overview of the most relevant studies regarding this modulatory effect of MSC on monocytes/macrophages including its mechanisms to improve cardiac functioning post-AMI.

Published
2013

95. Reduction of infarct size by intravenous injection of uncultured adipose derived stromal cells in a rat model is dependent on the time point of application.

Author

van Dijk A, Naaijkens BA, Jurgens WJ, Nalliah K, Sairras S, van der Pijl RJ, Vo K, Vonk AB, van Rossum AC, Paulus WJ, van Milligen FJ, and Niessen HW

Subjects
Animals, Biomarkers metabolism, Blood Vessels pathology, Cell Count, Cell Differentiation, Cells, Cultured, Disease Models, Animal, Heart Function Tests, Injections, Intravenous, Macrophages pathology, Male, Myocardial Infarction physiopathology, Myocytes, Cardiac pathology, Rats, Rats, Wistar, Stromal Cells cytology, Stromal Cells transplantation, Thromboembolism etiology, Thromboembolism pathology, Time Factors, Adipose Tissue cytology, Myocardial Infarction pathology, Myocardial Infarction therapy, Stem Cell Transplantation adverse effects, Stem Cells cytology
Abstract

Stem cell therapy is a promising tool to improve outcome after acute myocardial infarction (AMI), but needs to be optimized since results from clinical applications remain ambiguous. A potent source of stem cells is the stromal vascular fraction of adipose tissue (SVF), which contains high numbers of adipose derived stem cells (ASC). We hypothesized that: 1) intravenous injection can be used to apply stem cells to the heart. 2) Uncultured SVF cells are easier and safer when cultured ASCs. 3) Transplantation after the acute inflammation period of AMI is favorable over early injection. For this, AMI was induced in rats by 40min of coronary occlusion. One or seven days after AMI, rats were intravenously injected with vehicle, 5×10(6) uncultured rat SVF cells or 1×10(6) rat ASCs. Rats were analyzed 35 days after AMI. Intravenous delivery of both fresh SVF cells and cultured ASCs 7 days after AMI significantly reduced infarct size compared to vehicle. Similar numbers of stem cells were found in the heart, after treatment with fresh SVF cells and cultured ASCs. Importantly, no adverse effects were found after injection of SVF cells. Using cultured ASCs, however, 3 animals had shortness of breath, and one animal died during injection. In contrast to application at 7 days post AMI, injection of SVF cells 1 day post AMI resulted in a small but non-significant infarct reduction (p=0.35). Taken together, intravenous injection of uncultured SVF cells subsequent to the acute inflammation period, is a promising stem cell therapy for AMI., (Copyright © 2011 Elsevier B.V. All rights reserved.)

Published
2011
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96. N(epsilon)-(carboxymethyl)lysine depositions in intramyocardial blood vessels in human and rat acute myocardial infarction: a predictor or reflection of infarction?

Author

Baidoshvili A, Krijnen PA, Kupreishvili K, Ciurana C, Bleeker W, Nijmeijer R, Visser CA, Visser FC, Meijer CJ, Stooker W, Eijsman L, van Hinsbergh VW, Hack CE, Niessen HW, and Schalkwijk CG

Subjects
Aged, Animals, E-Selectin metabolism, Endothelial Cells metabolism, Female, Humans, Immunohistochemistry, Lysine biosynthesis, Lysine metabolism, Male, Middle Aged, Myocardial Infarction etiology, Myocardial Reperfusion, Myocarditis metabolism, Oxidative Stress, Peroxidase metabolism, Prognosis, Rats, Risk Factors, Time Factors, Coronary Vessels metabolism, Lysine analogs & derivatives, Myocardial Infarction metabolism
Abstract

Objective: Advanced glycation end products (AGEs), such as N(epsilon)-(carboxymethyl)lysine (CML), are implicated in vascular disease. We previously reported increased CML accumulation in small intramyocardial blood vessels in diabetes patients. Diabetes patients have an increased risk for acute myocardial infarction (AMI). Here, we examined a putative relationship between CML and AMI., Methods and Results: Heart tissue was stained for CML, myeloperoxidase, and E-selectin in AMI patients (n=26), myocarditis patients (n=17), and control patients (n=15). In AMI patients, CML depositions were 3-fold increased compared with controls in the small intramyocardial blood vessels and predominantly colocalized with activated endothelium (E-selectin-positive) both in infarction and noninfarction areas. A trend of increased CML positivity of the intima of epicardial coronary arteries did not reach significance in AMI patients. In the rat heart AMI model, CML depositions were undetectable after 24 hours of reperfusion, but became clearly visible after 5 days of reperfusion. In line with an inflammatory contribution, human myocarditis was also accompanied by accumulation of CML on the endothelium of intramyocardial blood vessels., Conclusions: CML, present predominantly on activated endothelium in small intramyocardial blood vessels in patients with AMI, might reflect an increased risk for AMI rather than being a result of AMI.

Published
2006
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97. Clusterin: a protective mediator for ischemic cardiomyocytes?

Author

Krijnen PA, Cillessen SA, Manoe R, Muller A, Visser CA, Meijer CJ, Musters RJ, Hack CE, Aarden LA, and Niessen HW

Subjects
Animals, Animals, Newborn, Antibodies, Monoclonal, Blotting, Western, Cells, Cultured, Flow Cytometry, Fluorescein-5-isothiocyanate, Fluorescent Dyes, Humans, Immunohistochemistry, In Vitro Techniques, Myoblasts physiology, Myocardial Infarction physiopathology, Myocardium metabolism, Rats, Heart physiology, Myocardial Ischemia physiopathology, Myocytes, Cardiac physiology
Abstract

We examined the relationship between clusterin and activated complement in human heart infarction and evaluated the effect of this protein on ischemic rat neonatal cardiomyoblasts (H9c2) and isolated adult ventricular rat cardiomyocytes as in vitro models of acute myocardial infarction. Clusterin protects cells by inhibiting complement and colocalizes with complement on jeopardized human cardiomyocytes after infarction. The distribution of clusterin and complement factor C3d was evaluated in the infarcted human heart. We also analyzed the protein expression of clusterin in ischemic H9c2 cells. The binding of endogenous and purified human clusterin on H9c2 cells was analyzed by flow cytometry. Furthermore, the effect of clusterin on the viability of ischemically challenged H9c2 cells and isolated adult ventricular rat cardiomyocytes was analyzed. In human myocardial infarcts, clusterin was found on scattered, morphologically viable cardiomyocytes within the infarcted area that were negative for complement. In H9c2 cells, clusterin was rapidly expressed after ischemia. Its expression was reduced after reperfusion. Clusterin bound to single annexin V-positive or annexin V and propidium iodide-positive H9c2 cells. Clusterin inhibited ischemia-induced death in H9c2 cells as well as in isolated adult ventricular rat cardiomyocytes in the absence of complement. We conclude that ischemia induces the upregulation of clusterin in ischemically challenged, but viable, cardiomyocytes. Our data suggest that clusterin protects cardiomyocytes against ischemic cell death via a complement-independent pathway.

Published
2005
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98. Role of plaque inflammation in acute and recurrent coronary syndromes.

Author

Meuwissen M, van der Wal AC, Siebes M, Koch KT, Chamuleau SA, van der Loos CM, Teeling P, de Winter RJ, Niessen HW, Tijssen JG, Becker AE, and Piek JJ

Abstract

Inflammation plays an important role in the initiation, development, progression and complications of atherosclerotic vascular disease. Our present knowledge of the elementary role of inflammation for the onset of plaque rupture in atherosclerotic coronary lesions primarily stems from autopsy studies. However, the introduction of directional coronary atherectomy catheters has provided a unique opportunity to directly investigate the role of inflammation in coronary syndromes. In this report we describe the role of coronary plaque inflammation, as determined by immunohistochemistry, on the presentation of coronary syndromes and on the clinical outcome following percutaneous interventions.

Published
2004

99. NAD(P)H oxidase in the failing human heart.

Author

Krijnen PA, Meischl C, Visser CA, Hack CE, Niessen HW, and Roos D

Subjects
Humans, Myocardium enzymology, NADPH Oxidases, Bacterial Proteins, Heart Failure enzymology, NADH, NADPH Oxidoreductases analysis
Published
2003
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100. Type II secretory phospholipase A2 binds to ischemic flip-flopped cardiomyocytes and subsequently induces cell death.

Author

Nijmeijer R, Willemsen M, Meijer CJ, Visser CA, Verheijen RH, Gottlieb RA, Hack CE, and Niessen HW

Subjects
Animals, C-Reactive Protein metabolism, C-Reactive Protein pharmacology, Calcium metabolism, Cell Death drug effects, Cell Line, Chelating Agents pharmacology, Egtazic Acid pharmacology, Energy Metabolism drug effects, Group II Phospholipases A2, Male, Phospholipases A pharmacology, Phospholipases A2, Rabbits, Rats, Cell Death physiology, Myocardial Ischemia metabolism, Myocytes, Cardiac cytology, Myocytes, Cardiac enzymology, Phospholipases A metabolism
Abstract

Type II secretory phospholipase A2 (sPLA2) is a cardiovascular risk factor. We recently found depositions of sPLA2 in the necrotic center of infarcted human myocardium and normally appearing cardiomyocytes adjacent to the border zone. The consequences of binding of sPLA2 to ischemic cardiomyocytes are not known. To explore a potential effect of sPLA2 on ischemic cardiomyocytes at a cellular level we used an in vitro model. The cardiomyocyte cell line H9c2 or adult cardiomyocytes were isolated from rabbits that were incubated with sPLA2 in the presence of metabolic inhibitors to mimic ischemia-reperfusion conditions. Cell viability was established with the use of annexin V and propidium iodide or 7-aminoactinomycin D. Metabolic inhibition induced an increase of the number of flip-flopped cells, including a population that did not stain with propidium iodide and that was caspase-3 negative. sPLA2 bound to the flip-flopped cells, including those negative for caspase-3. sPLA2 binding induced cell death in these latter cells. In addition, sPLA2 potentiated the binding of C-reactive protein (CRP) to these cells. We conclude that by binding to flip-flopped cardiomyocytes, including those that are caspase-3 negative and presumably reversibly injured, sPLA2 may induce cell death and tag these cells with CRP.

Published
2003
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