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10 results on '"Gero, L."'

1. Novel Furin Inhibitors with Potent Anti-infectious Activity

Author

Kornelia Hardes, Sven O. Dahms, Gero L. Becker, Kirsten Sandvig, Manuel E. Than, Torsten Steinmetzer, Wolfgang Beyer, Yinghui Lu, Susanne M. Köhler, Wolfgang Garten, Hiroyuki Yamamoto, Veronika von Messling, Iris Lindberg, and Lisa Walz

Subjects
animal structures, Peptidomimetic, viruses, Microbial Sensitivity Tests, medicine.disease_cause, Antiviral Agents, Biochemistry, Virus, Structure-Activity Relationship, Drug Discovery, medicine, Humans, Structure–activity relationship, Enzyme Inhibitors, General Pharmacology, Toxicology and Pharmaceutics, Distemper Virus, Canine, Furin, Pharmacology, Diphtheria toxin, Dose-Response Relationship, Drug, Molecular Structure, biology, Canine distemper, Organic Chemistry, medicine.disease, Virology, Influenza A virus subtype H5N1, Influenza A virus, biology.protein, Molecular Medicine, Proprotein Convertases
Abstract

New peptidomimetic furin inhibitors with unnatural amino acid residues in the P3 position were synthesized. The most potent compound 4-guanidinomethyl-phenylacteyl-Arg-Tle-Arg-4-amidinobenzylamide (MI-1148) inhibits furin with a Ki value of 5.5 pM. The derivatives also strongly inhibit PC1/3, whereas PC2 is less affected. Selected inhibitors were tested in cell culture for antibacterial and antiviral activity against infectious agents known to be dependent on furin activity. A significant protective effect against anthrax and diphtheria toxin was observed in the presence of the furin inhibitors. Furthermore, the spread of the highly pathogenic H5N1 and H7N1 avian influenza viruses and propagation of canine distemper virus was strongly inhibited. Inhibitor MI-1148 was crystallized in complex with human furin. Its N-terminal guanidinomethyl group in the para position of the P5 phenyl ring occupies the same position as that found previously for a structurally related inhibitor containing this substitution in the meta position, thereby maintaining all of the important P5 interactions. Our results confirm that the inhibition of furin is a promising strategy for a short-term treatment of acute infectious diseases.

Published
2015
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2. Effect of Sibutramine on Cardiovascular Outcomes in Overweight and Obese Subjects

Author

James, Wp, Caterson, Id, Coutinho, W, Finer, N, VAN GAAL LF, Maggioni, Ap, TORP-PEDERSEN, C, Sharma, Am, Shepherd, Gm, Rode, Ra, Renz, Cl, Van Gaal LF, Torp-Pedersen, C, Pepine, C, Pocock, S, Drexler, H, Swedberg, K, Sleight, P, Armstrong, P, Kerr, D, Dagenais, G, Brophy, J, Avezum, A, Bogaty, P, Fabbri, G, Galli, M, Hildebrandt, P, Mann, J, Ostergren, J, Sherman, D, Zannad, F, Colquhoun, D, Hollanders, G, e Forti A, Costa, Cifkova, R, Toubro, S, Ziegler, O, Scherbaum, Wa, Jordan, J, Halmy, L, Ferrannini, E, Santini, F, Gonzalez, C, Narkiewicz, K, Hancu, N, Payer, J, Pascual, J, Wilding, J, Campbell, L, Carey, D, Gerstman, M, Karrasch, J, Lefkovits, J, Marks, J, Marks, S, Moses, R, Phillips, P, Proietto, J, Roberts, D, Roberts-Thomson, P, Shaw, J, Simpson, R, Singh, B, Singleton Jeffries, W, Stuckey, B, Boland, J, Brohet, C, Coucke, F, Dendale, P, Jouret, G, Kolanowski, J, Kutnowski, M, Martens, F, Muls, E, Peiffer, F, Penninckx, H, Scheen, A, Schoors, D, Vaerenberg, M, Van Cleemput, J, Van Crombrugge, P, Van Kuyk, M, Verhaegen, A, Wollaert, B, de Albuquerque DC, Appolinario, J, de Godoy Matos AF, Gross, Jl, Halpern, A, Kerr Saraiva JF, Milagres, R, Repetto, G, Suplicy, Hl, Zanella, Mt, Bednarova, J, Cepelak, V, Cerny, P, Hainer, V, Havranek, P, Homza, M, Jansa, P, Karlicek, M, Kolesar, J, Kotik, I, Kucera, D, Kuchar, J, Kunc, M, Kvapil, M, Linhart, A, Machova, V, Matuska, J, Oral, I, Pavlas, J, Pesatova, S, Povolny, J, Semrad, B, Smetana, K, Soucek, M, Svacina, S, Tesinsky, P, Urbanek, R, Wasserburger, B, Zachoval, R, Zahumensky, E, Zidkova, E, Astrup, A, Dominguez, H, Faber, J, Hilderbrant, P, Kober, L, Perrild, H, Richelsen, B, Sogaard, P, Svendsen, Ol, Urhammer, S, Archambeaud, F, Basdevant, A, Borys, Jm, Bringer, J, Brunetiere, C, Charpentier, G, Cocaul-André, M, Dabadie, H, Dubreuil, A, Estour, B, Gautier, Jf, Gibault, T, Halimi, S, Hespel, Jp, Issa Sayegh, M, Krempf, M, Laville, M, Lecerf, Jm, Louvet, Jp, Penfornis, A, Ritz, P, Schlienger, Jl, Schmitt, B, Valensi, P, Baar, M, Beermann, J, Bock, M, Boenner, G, Dammann, Hg, Diehm, C, Ditschuneit, H, Gadow, J, Gehlhar, S, Gessner, S, Guthersohn, A, Hamann, A, Hanefeld, M, Hasenfuss, G, Herzner, A, Heun, Kc, Heufelder, Ae, Hohensee, H, Jacob, S, Krings, P, Krätzig, B, Krosse, B, Lehmann, Rt, Mindt-Prüfert, S, Maisch, B, Pfeiffer, Af, Richard, F, Rose, B, Schmidt, E, Scholze, J, Schreckenberg, A, Stuebler, P, Walter, J, Wirth, A, Wunderlich, J, Abraham, G, Altorjay, A, Augusztin, G, Csaszar, A, Czuriga, I, Dinnyes, J, Gero, L, Gyimesi, A, Janosi, A, Kovacs, I, Liziczai, I, Majtenyi, A, Medvegy, M, Nadhazi, Z, Pados, G, Polak, G, Ronaszeki, A, Sido, Z, Simon, K, Anzà, C, Bevilacqua, M, Bosello, O, Chiariello, M, Cordera, R, Ferrari, E, Frittitta, L, Giorgino, R, Liuzzi, A, Malinverni, C, Di Mario, U, Melchionda, N, Occhi, G, Perticone, F, Pinchera, A, Pinelli, G, Rovera, G, Santeusanio, F, Urbinati, S, Alpizar-Salazar, M, Carrillo-Ortega, E, Fanghanel Salmon, G, Laviada-Molina, Ha, Madero, Ma, Rodriguez, G, Saldate, C, Sanchez-Castillo, Cp, Violante, Rm, Wacher, N, Zayas-Jaime, Fj, Zuniga-Guajardo, S, Adamiec, R, Banasiak, W, Chrusciel, P, Derlaga, B, Gebala, A, Gessek, J, Janik, K, Janion, M, Kalina, Z, Kozlowski, A, Kusnierz, B, Majcher, Z, Miekus, P, Niegowska, J, Okopien, B, Ostrowska, L, Pasowicz, M, Piepiorka, M, Pluta, W, Polaszewska-Muszynska, M, Ponikowski, P, Pupek-Musialik, D, Sawicki, A, Sobocik, H, Stankiewicz, A, Szpajer, M, Trojnar, R, Tykarski, A, Wrabec, K, Wyrzkowski, B, Zahorska-Markiewicz, B, Zalewski, M, Carrageta, M, Mendes Pedro MM, Parente Martins LM, dos Santos, L, Babes, A, Creteanu, G, Dan, Ga, Dragulescu, Si, Graur, M, Tirgoviste, Ci, Morosanu, M, Mota, M, Paveliu, Fs, Radoi, M, Ranetti, A, Totoian, I, Andre, I, Bugan, V, Cencarik, J, Csala, L, Farsky, S, Gonsorcik, J, Kamensky, G, Kmec, J, Krahulec, B, Kurian, R, Macek, V, Majercak, I, Micko, K, Mokan, M, Riecansky, I, Sojka, G, Uhliar, R, Urgeova, L, Vancik, J, Baro, Fm, Barrios Merino, A, Borras, Jl, Caixas, A, Cuatrecasas Cambra, G, Dominguez Escribano JR, Duran Garcia, S, Escobar-Jimenez, L, Esteva de Antonio, I, Formiguera Sala, X, Garcia-Luna, Pp, Garcia Robles, R, Gonzalez Albarran, O, Hernandez-Mijares, A, Martin Hidalgo, A, Masmiquel Comas, L, Morales Perez, F, Moreno Esteban, B, Pascual Izuel JM, Redon Mas, J, Ricart, W, Rubio, Ma, Ruilope, Lm, Salas-Salvado, J, Terroba Larumbe, M, Tinahones, F, de la Torre Casares ML, Vidal Cortada, J, Zuniga-Perez Lemaur, M, Abdulhakim, Ee, Adler, A, Barnett, Ah, Bodmer, C, Campbell, Iw, Chowdhury, T, Cleland, J, Cook, Rc, Dinneen, S, Donnachie, H, Haslam, Dw, Hillis, Gs, Horne, M, Howarth, Dj, Hughes, E, Jackson, S, Jones, Sc, Jones, Th, Kumar, S, Lean, M, Maroni, J, Mcinnes, G, Middleton, A, Morris, A, Newcombe, G, O'Kane, Kp, Pavel, Ic, Pawa, R, Perry, C, Pitts, C, Raja, A, Reckless, J, Robinson, J, Sarmiento, R, Soo, Sc, Taylor, S, Thomas, Ho, Thomson, Ma, and Wilkins, M.

Subjects
Male, medicine.medical_specialty, Myocardial Infarction, Blood Pressure, Kaplan-Meier Estimate, Type 2 diabetes, Klinikai orvostudományok, Placebo, law.invention, Double-Blind Method, Randomized controlled trial, Weight loss, law, Internal medicine, Appetite Depressants, medicine, Humans, Obesity, Myocardial infarction, Stroke, Aged, business.industry, Hazard ratio, Orvostudományok, General Medicine, Middle Aged, Overweight, medicine.disease, Surgery, Diabetes Mellitus, Type 2, Cardiovascular Diseases, Cardiology, Female, Human medicine, medicine.symptom, business, Cyclobutanes, Sibutramine, medicine.drug
Abstract

Background The long-term effects of sibutramine treatment on the rates of cardiovascular events and cardiovascular death among subjects at high cardiovascular risk have not been established. Methods We enrolled in our study 10,744 overweight or obese subjects, 55 years of age or older, with preexisting cardiovascular disease, type 2 diabetes mellitus, or both to assess the cardiovascular consequences of weight management with and without sibutramine in subjects at high risk for cardiovascular events. All the subjects received sibutramine in addition to participating in a weight-management program during a 6-week, single-blind, lead-in period, after which 9804 subjects underwent random assignment in a double-blind fashion to sibutramine (4906 subjects) or placebo (4898 subjects). The primary end point was the time from randomization to the first occurrence of a primary outcome event (nonfatal myocardial infarction, nonfatal stroke, resuscitation after cardiac arrest, or cardiovascular death). Results The mean duration of treatment was 3.4 years. The mean weight loss during the lead-in period was 2.6 kg; after randomization, the subjects in the sibutramine group achieved and maintained further weight reduction (mean, 1.7 kg). The mean blood pressure decreased in both groups, with greater reductions in the placebo group than in the sibutramine group (mean difference, 1.2/1.4 mm Hg). The risk of a primary outcome event was 11.4% in the sibutramine group as compared with 10.0% in the placebo group (hazard ratio, 1.16; 95% confidence interval [CI], 1.03 to 1.31; P=0.02). The rates of nonfatal myocardial infarction and nonfatal stroke were 4.1% and 2.6% in the sibutramine group and 3.2% and 1.9% in the placebo group, respectively (hazard ratio for nonfatal myocardial infarction, 1.28; 95% CI, 1.04 to 1.57; P=0.02; hazard ratio for nonfatal stroke, 1.36; 95% CI, 1.04 to 1.77; P=0.03). The rates of cardiovascular death and death from any cause were not increased. Conclusions Subjects with preexisting cardiovascular conditions who were receiving long-term sibutramine treatment had an increased risk of nonfatal myocardial infarction and nonfatal stroke but not of cardiovascular death or death from any cause. (Funded by Abbott; ClinicalTrials.gov number, NCT00234832.)

Published
2010
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3. New substrate analogue furin inhibitors derived from 4-amidinobenzylamide

Author

Torsten Steinmetzer, Kornelia Hardes, and Gero L. Becker

Subjects
Peptidomimetic, Clinical Biochemistry, Amidines, Molecular Conformation, Pharmaceutical Science, Biochemistry, Structure-Activity Relationship, Benzyl Compounds, Drug Discovery, medicine, Enzyme Inhibitors, Molecular Biology, Furin, chemistry.chemical_classification, Serine protease, Dose-Response Relationship, Drug, biology, Chemistry, Organic Chemistry, Substrate (chemistry), Proprotein convertase, Protease inhibitor (biology), Amino acid, biology.protein, Molecular Medicine, Peptidomimetics, Oligopeptides, Proprotein Convertase Inhibitors, medicine.drug
Abstract

A series of new peptidomimetic furin inhibitors was synthesized, which was derived from our previously described lead structure phenylacetyl-Arg-Val-Arg-4-amidinobenzylamide (1). Substitution of Val by other amino acid residues revealed several highly potent furin inhibitors with Ki values of less than 2 nM, containing guanidinoalanine, Ile, Phe or Tyr in the P3 position. The replacement of the P2 Arg by Lys was also well accepted, whereas the incorporation of d -amino acids at various positions resulted in poor inhibitors. The use of the 4-amidinobenzylamide group provides convenient synthetic access to stable proprotein convertase inhibitors and derivatives as biochemical tools and for further studies in cell culture.

Published
2011
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4. X-ray Structures of Human Furin in Complex with Competitive Inhibitors

Author

Kornelia Hardes, Gero L. Becker, Manuel E. Than, Hans Brandstetter, Sven O. Dahms, and Torsten Steinmetzer

Subjects
Protein Conformation, medicine.medical_treatment, viruses, Crystallography, X-Ray, Biochemistry, Virus, Protein structure, medicine, Humans, Letters, Enzyme Inhibitors, Furin, chemistry.chemical_classification, Protease, biology, Rational design, Pandemic influenza, General Medicine, biology.organism_classification, Bacillus anthracis, Molecular Docking Simulation, Enzyme, chemistry, embryonic structures, biology.protein, Molecular Medicine
Abstract

Furin inhibitors are promising therapeutics for the treatment of cancer and numerous infections caused by bacteria and viruses, including the highly lethal Bacillus anthracis or the pandemic influenza virus. Development and improvement of inhibitors for pharmacological use require a detailed knowledge of the protease’s substrate and inhibitor binding properties. Here we present a novel preparation of human furin and the first crystal structures of this enzyme in complex with noncovalent inhibitors. We show the inhibitor exchange by soaking, allowing the investigation of additional inhibitors and substrate analogues. Thus, our work provides a basis for the rational design of furin inhibitors.

Published
2014

6. Highly Potent Inhibitors of Proprotein Convertase Furin as Potential Drugs for Treatment of Infectious Diseases*

Author

Wolfgang Garten, Udo Bakowsky, Robert Day, Torsten Steinmetzer, Boris Strehlow, Kirsten Sandvig, Christine Levesque, Kornelia Hardes, Gero L. Becker, Yinghui Lu, and Iris Lindberg

Subjects
Proteases, animal structures, medicine.medical_treatment, viruses, Chemistry, Pharmaceutical, Hemagglutinin (influenza), Saccharomyces cerevisiae, Biochemistry, Communicable Diseases, Shiga Toxin, Dogs, medicine, Animals, Humans, Protease inhibitor (pharmacology), Protease Inhibitors, Molecular Biology, Furin, Chromatography, High Pressure Liquid, Micelles, Protease, biology, Dose-Response Relationship, Drug, Peptide chemical synthesis, fungi, Cell Biology, Proprotein convertase, Benzamidines, Kinetics, Hemagglutinins, Models, Chemical, Drug Design, embryonic structures, biology.protein, Enzymology, Proprotein Convertases, Peptides, Oligopeptides, Peptide Hydrolases
Abstract

Optimization of our previously described peptidomimetic furin inhibitors was performed and yielded several analogs with a significantly improved activity. The most potent compounds containing an N-terminal 4- or 3-(guanidinomethyl)phenylacetyl residue inhibit furin with K(i) values of 16 and 8 pM, respectively. These analogs inhibit other proprotein convertases, such as PC1/3, PC4, PACE4, and PC5/6, with similar potency, whereas PC2, PC7, and trypsin-like serine proteases are poorly affected. Incubation of selected compounds with Madin-Darby canine kidney cells over a period of 96 h revealed that they exhibit great stability, making them suitable candidates for further studies in cell culture. Two of the most potent derivatives were used to inhibit the hemagglutinin cleavage and viral propagation of a highly pathogenic avian H7N1 influenza virus strain. The treatment with inhibitor 24 (4-(guanidinomethyl)phenylacetyl-Arg-Val-Arg-4-amidinobenzylamide) resulted in significantly delayed virus propagation compared with an inhibitor-free control. The same analog was also effective in inhibiting Shiga toxin activation in HEp-2 cells. This antiviral effect, as well as the protective effect against a bacterial toxin, suggests that inhibitors of furin or furin-like proprotein convertases could represent promising lead structures for future drug development, in particular for the treatment of infectious diseases.

Published
2012

7. Cardiorenal End Points in a Trial of Aliskiren for Type 2 Diabetes

Author

Parving, Hh, Brenner, Bm, Mcmurray, Jj, de Zeeuw, D, Haffner, Sm, Solomon, Sd, Chaturvedi, N, Persson, F, Desai, As, Nicolaides, M, Richard, A, Xiang, Z, Brunel, P, Pfeffer, Ma, Viberti, G, Lachin, Jm, Zinman, B, Pedersen, Tr, Villamil, As, Juncos, L, Prager, R, Verpooten, G, Zanella, Mt, Leiter, L, Pan, C, Wang, H, Botero, R, Cifkova, R, Christiansen, Js, Groop, Ph, Marre, M, Haller, H, Nickenig, G, Siamopoulos, K, Gero, L, Maggioni, A, Remuzzi, G, Katayama, Ss, Kim, Sg, Petrulioniene, Z, Lok, D, Kooy, A, Jorde, R, Medina, F, Polonia, J, Wong, Ks, Dukat, A, Rayner, Bl, Ruilope, L, Weiss, L, Wuethrich, R, Sheu, W, Sritara, P, Comlekci, A, Bilous, R, Toto, R, Jamerson, K, Carillo, E, Orias, M, Kuschnir, E, Rusculleda, M, Garcia, S, Farias, E, Lema, L, Hominal, M, Montaña, O, Sala, J, Diaz, M, Piskorz, D, Vita, N, Litwak, L, Sinay, I, Marin, M, Massari, P, Majul, C, Aizemberg, D, Azize, Gm, Bartolacci, I, Reboredo, A, Vico, M, Milesi, R, Sessa, H, Wassermann, A, Margulis, F, Zangroniz, P, Watschinger, B, Toplak, H, Paulweber, B, Drexel, H, Francesconi, C, Foeger, B, Mayer, G, Braun, Rk, Brath, H, Gaal, Lv, Niepen, Pv, Persu, A, Vercammen, C, Vriese, Ad, Coucke, F, Mathieu, C, Fery, F, Treille, S, Meeus, G, Acker, Kv, Scheen, A, Tits, J, Ruige, J, Krzesinski, Jm, Hollanders, G, Liénart, F, Dendale, P, Quinonez, M, Arnouts, P, Vanuytsel, J, Zanella, M, Mion D., Jr, Forti, A, Almeida, F, Cunha, R, de Paula RB, Brandao, A, Rocha, J, Krieger, E, Feitosa, G, Saraiva, J, Martin, J, Hissa, Mn, Schmid, H, Felicio, J, Sgarbi, J, Oigman, W, Bowering, K, Garceau, C, Berlingieri, Jc, Weisnagel, Sj, Hardin, P, Powell, C, Turcot, R, Muirhead, N, Aronson, R, Barima, Yt, Steele, Aw, Pandey, S, Woo, V, Cha, J, Dattani, D, Godin, C, Gupta, M, Saunders, K, Tellier, G, Ting, R, Tobe, S, Chouinard, G, Schlosser, R, Khandwala, H, Ekoe, Jm, Harris, Sb, Pichette, V, Lachance, P, Ooi, Tc, Tildesley, H, Barrett, B, Cournoyer, S, Lu, J, Zhang, H, Liu, X, Yan, S, Qi, X, Li, Q, Li, H, Lv, X, Yang, J, Sun, N, Xia, W, Wang, N, Tong, N, Mei, C, Gu, S, Zhang, J, Chen, X, Li, L, Su, B, Wang, L, Qiu, M, Wu, X, Liu, Z, Jia, W, Xu, G, Dong, J, Zhu, D, Zhang, M, Yan, J, Liu, B, Chen, J, Fu, J, Yan, L, Zhan, X, Zhong, L, Yang, T, Ma, J, Xu, M, Xu, X, Shi, B, Ji, Q, Zhong, H, He, R, Yuan, Z, Zhou, Z, Lin, H, Yang, W, Ke, Y, Hong, T, Franco, C, Casas, L, Triana, A, Jaramillo, C, Hernandez, E, Barrera, C, Blanco, D, Stipal, R, Widimsky, P, Dohnalova, L, Komroskova, M, Kvapil, M, Belobradkova, J, Tesar, V, Vodnansky, P, Kocourkova, B, Lervang, Hh, Perrild, H, Rossing, P, Oestergaard, O, Juhl, H, Thorsteinsson, B, Snorgaard, O, Urhammer, S, Egstrup, K, Tikkanen, T, Helin, K, Rinne, J, Lahtela, J, Strand, J, Valtonen, E, Saari, M, Kananen, K, Savela, K, Blacher, J, Aldigier, Jc, Zaoui, P, Fauvel, Jp, Gouet, D, Valensi, Pe, Charpentier, G, Marechaud, R, Penfornis, A, Ovize, M, Kovalchuck, Aa, Dellanna, F, Schoen, N, Groeschel, W, Eickhoff, F, Hanefeld, M, Merke, J, Rambausek, M, Zimmermann, U, Stuetz, W, Vosskuehler, A, Hevendehl, G, Schax, U, Lehmann, G, Haack, A, Hilgenberg, J, Klausmann, G, Adelberger, V, Gessner, S, Fiesselmann, A, Oerter, E, Hohenstatt, T, Groeschel, A, Behnke, T, Sisting, Rt, Schoch, D, Bieler, T, Schleyer, S, Altes, U, Klepzig, C, Rudofsky, G, Mueller, G, Burkhardt, F, Reschke, K, Senftleber, I, Wiesweg, Ck, Herrmann, Hj, Brandstetter, R, Segner, A, Schmitt, H, Rippert, R, Goebel, R, Schreibmueller, F, Pencz, I, Ott, P, Migdalis, I, Pappas, S, Pagkalos, E, Yalouris, A, Tsapas, A, Maltezos, E, Tentolouris, N, Papadakis, I, Ioannidis, G, Goumenos, D, Corona, V, Gonzalez, R, Haase, F, Monterroso, V, Sánchez, V, Turcios, E, Wyss, F, Arango, Jl, Bako, B, Deak, L, Dömötör, E, Dudas, M, Fulop, T, Kiss, I, Koranyi, L, Lengyel, Z, Nyirati, G, Oroszlan, T, Aniko, S, Vörös, P, Kapocsi, J, Wittmann, I, Paragh, G, Abraham, G, Tandon, N, Thomas, N, Mohan, V, Sahay, R, Sethi, B, Rao, V, Kumar, S, Chowdhury, S, Dharmalingam, M, Seshiah, V, Bantwal, G, Viswanathan, V, Yajnik, C, Adhikari, P, Krishnan, U, Varthakavi, P, Hiremath, J, Bhattacharyya, A, Dani, S, Modi, Kk, Glorioso, N, Morosetti, M, Veglio, Franco, Perticone, F, Dotta, F, Quarello, F, Sesti, G, Aiello, A, D'Ospina, A, Giordano, C, Novo, S, Santoro, A, Ferri, C, Capuano, V, Trimarco, B, Tonolo, G, Villa, G, De Pellegrin, A, Zanette, G, Federici, M, Aucello, G, Piatti, P, Vinciguerra, A, Mannarino, E, Taddei, S, Filetti, S, Grandaliano, G, Marchionni, N, Lambiase, C, Locatelli, F, Scanferla, F, Lembo, G, Leotta, S, Mos, L, Calatola, P, Fogari, R, David, S, Pedrinelli, R, Pignone, Am, Cozzolino, D, Bevilacqua, Mt, Catena, C, Del Prato, S, Cerasola, G, Frontoni, S, Falcone, C, Porta, A, Bonora, E, Cocchi, R, Fucili, A, Frisinghelli, A, Volpe, M, Carugo, S, Gambardella, S, Spagnuolo, V, Maglia, G, D'Angelo, Ar, Corsi, A, Limone, Pp, Guarnieri, A, Ghigo, Ezio, Ronchi, E, Ravera, M, Scioli, Ga, Sekiguchi, M, Aoki, S, Ogawa, Y, Seino, H, Onishi, Y, Tojo, A, Narimiya, M, Iwaita, Y, Takeda, H, Shimizu, H, Yamada, T, Kojima, S, Zushi, S, Kaneko, S, Matsumoto, A, Kajiyama, S, Fujita, H, Shikata, K, Tone, A, Matsubayashi, S, Tanaka, S, Sekigami, T, Tatsukawa, Y, Abe, N, Kawahara, K, Kasahara, H, Maeda, Y, Suzuki, Y, Okamoto, H, Tachi, K, Yamada, K, Uzu, T, Itou, T, Fukui, T, Kim, S, Kim, Y, Cho, W, Kwak, I, Chae, D, Oh, H, Ha, S, Shin, Y, Cha, D, Kang, S, Lim, C, Song, J, Kwon, Y, Badariene, J, Labutiniene, Ip, Zabuliene, L, Poteliuniene, V, Miglinas, M, van den Meiracker AH, Gregoor, Pj, Luik, Aj, van Loon BJ, Feenstra, Hj, Kaasjager, Ha, Viergever, Pp, Woittiez, Aj, van Bemmel, T, Lieverse, Ag, Simsek, S, Gaillard, Ca, van der Zwaan, C, Lok, Dj, Spiering, W, Nierop, Pr, Baggen, Mg, Leendert, Rj, de Jong, A, Leurs, Pb, Vincent, Hh, Wins, Eh, Voors, Aa, Ronner, E, Heeg, Je, van Hal JM, Boermans, T, Feis, Wl, Mostard, G, Bakker, Rc, Dunselman, Ph, Skeie, S, Istad, H, Skjelvan, G, Gronert, J, Tomala, T, Gudnason, S, Torvik, Dt, Risberg, K, Abedini, S, Cabrera, W, Medina, B, Herrada, B, Saavedra, A, Polonia, Dj, Providencia, Dl, Carvalho, D, Vasconcelos, Mp, da Silva GF, Branco, P, Gil, Dv, da Costa AG, da Silva PM, Arez, L, Martins, L, Birne, R, Dzuponova, J, Surovcikova, M, Culak, J, Filipova, S, Andre, I, Stevlik, J, Uhliar, R, Fabryova, L, Benacka, J, Koleny, D, Szentivanyi, M, Spisak, V, Pella, D, Pastrnakova, E, Martinka, E, Chua, T, Lau, T, Ng, Tg, Yeoh, Ly, Bhana, Sa, Rayner, B, Wellmann, H, Amod, A, Ranjith, N, Ahmed, F, Rheeder, P, Makan, H, Naicker, P, Podgorski, G, De Teresa, E, Olivan, J, Fernandez, Vl, Povedano, St, Terns, M, Ricart, W, Gonzalez, Jm, Fernandez, P, Parreño Lde, T, Redon, J, Parra, J, Calvo, C, Lopez, I, Puig, Jg, Calle, A, Garcia, Jc, Lopez, Jm, Jimenez, Ml, Fraile, B, Perez, Js, Nadal, Jj, Guija, E, Calviño, J, Barrios, V, Iglesias, Jn, Armario, P, Garcia, M, Aranda, P, Brotons, C, Gomez, P, Catelao, Am, Cusachs, Ar, Sarro, M, Martinez, V, dell Valle MH, Trias, F, Comas, A, Salvador, N, Martinez, F, Hernandez, F, 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Gallen, I, Gnudi, L, Harvey, J, O'Hare, P, Vora, J, Winocour, P, Soran, H, Browne, D, Darko, D, Mancebo, Jg, de Roa ER, Antepara, N, Carrillo, E, Berrizbeitia, M, Guevara, L, Pernalete, N, Ontiveros, C, Zigrang, W, Blakney, E, Rosenblit, P, Weinstein, R, Klaff, L, Lipetz, R, Busick, E, Tung, P, Cooperman, M, Michael, S, Sun, Ch, Hart, T, Maddux, A, Bowden, R, East, C, Arakaki, R, Villafuerte, B, Mamish, Z, Mendez, R, Connery, L, Nour, K, Wynne, A, Busch, R, Zamora, B, Sachson, R, Prasad, J, Lasala, G, Smith, M, Fitz Patrick, D, Ruiz Rivera, L, Barranco, E, Solomon, R, Woolley, A, Brown, C, Freedman, Z, Schmidt, S, Pollock, J, Ruddy, M, Kopyt, Np, Bazzi, A, Horowitz, B, Feng, W, Wahl, T, Duprez, D, Gilbert, J, Steigerwalt, S, Jacqmein, J, Gorton, S, 3rd, Allison J., Pino, J, Lock, J, Leimbach, W, Anderson, J, Beacom, M, Craig, W, Gorson, D, Kerstein, H, Segal, S, Downey, H, Ledger, G, Mcgill, J, Gabriel, J, Nolen, T, Levinson, L, Williams, T, Levenson, D, Lerman, S, Minehart, C, Agarwal, N, Verma, S, Valitutto, M, Demetry, K, Mersey, J, Koeper, D, Fanti, P, Eng, G, Grimm, R, Fagan, T, Bajaj, M, Katz, L, Portnay, G, Altschuller, A, Desai, V, Bilazarian, S, Ipp, E, Rodelas, R, Burstein, D, Berg, J, Velez, J, Lund, R, Rekhi, A, Martin, E, Robertson, D, Singh, N, Narayan, P, Moustafa, M, Lanier, D, Seidner, M, Phillips, A, Vaughters, B, Sprague, A, Swartz, S, Lopez, R, Kumar, J, Bressler, P, Sadler, L, Wise, J, Kilbane, A., and Groningen Kidney Center (GKC)

Subjects
Male, Hyperkalemia, CARDIOVASCULAR MORTALITY, BLOOD-PRESSURE, Angiotensin-Converting Enzyme Inhibitors, Type 2 diabetes, GLOMERULAR-FILTRATION-RATE, DOUBLE-BLIND, chemistry.chemical_compound, Fumarates, cardiovascular disease, Renin, Treatment Failure, Settore MED/49 - Scienze Tecniche Dietetiche Applicate, 610 Medicine & health, diabetes, Medicine (all), Hazard ratio, aliskiren, diabete, trial clinico, Liter, General Medicine, Middle Aged, hypertension, Cardiovascular Diseases, Combination, HEART-FAILURE, Drug Therapy, Combination, Female, Kidney Diseases, type 2 diabetes, medicine.symptom, Type 2, medicine.medical_specialty, Patient Dropouts, Urology, Hypokalemia, Aliskiren, chronic kidney disease, Placebo, Angiotensin Receptor Antagonists, LEFT-VENTRICULAR DYSFUNCTION, Drug Therapy, Double-Blind Method, Diabetes Mellitus, medicine, Humans, CONVERTING-ENZYME INHIBITORS, Antihypertensive Agents, Aged, Amides, Diabetes Mellitus, Type 2, Follow-Up Studies, business.industry, medicine.disease, Confidence interval, Surgery, Blood pressure, MYOCARDIAL-INFARCTION, chemistry, SYSTOLIC DYSFUNCTION, FOLLOW-UP, business
Abstract

BACKGROUND This study was undertaken to determine whether use of the direct renin inhibitor aliskiren would reduce cardiovascular and renal events in patients with type 2 diabetes and chronic kidney disease, cardiovascular disease, or both. METHODS In a double-blind fashion, we randomly assigned 8561 patients to aliskiren (300 mg daily) or placebo as an adjunct to an angiotensin-converting-enzyme inhibitor or an angiotensin-receptor blocker. The primary end point was a composite of the time to cardiovascular death or a first occurrence of cardiac arrest with resuscitation; nonfatal myocardial infarction; nonfatal stroke; unplanned hospitalization for heart failure; end-stage renal disease, death attributable to kidney failure, or the need for renal-replacement therapy with no dialysis or transplantation available or initiated; or doubling of the baseline serum creatinine level. RESULTS The trial was stopped prematurely after the second interim efficacy analysis. After a median follow-up of 32.9 months, the primary end point had occurred in 783 patients (18.3%) assigned to aliskiren as compared with 732 (17.1%) assigned to placebo (hazard ratio, 1.08; 95% confidence interval [CI], 0.98 to 1.20; P = 0.12). Effects on secondary renal end points were similar. Systolic and diastolic blood pressures were lower with aliskiren (between-group differences, 1.3 and 0.6 mm Hg, respectively) and the mean reduction in the urinary albumin-to-creatinine ratio was greater (between-group difference, 14 percentage points; 95% CI, 11 to 17). The proportion of patients with hyperkalemia (serum potassium level, = 6 mmol per liter) was significantly higher in the aliskiren group than in the placebo group (11.2% vs. 7.2%), as was the proportion with reported hypotension (12.1% vs. 8.3%) (P CONCLUSIONS The addition of aliskiren to standard therapy with renin-angiotensin system blockade in patients with type 2 diabetes who are at high risk for cardiovascular and renal events is not supported by these data and may even be harmful. (Funded by Novartis; ALTITUDE ClinicalTrials.gov number, NCT00549757.)

Published
2012
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8. Fast microcalcification detection on digital breast tomosynthesis datasets

Author

Razvan Iordache, Sylvain Bernard, Serge Muller, and Gero L. Peters

Subjects
medicine.diagnostic_test, business.industry, Computation, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Image segmentation, Thresholding, Tomosynthesis, Contrast-to-noise ratio, medicine, Mammography, Computer vision, Microcalcification, Artificial intelligence, Noise (video), medicine.symptom, business, Mathematics
Abstract

In this paper, we present a fast method for microcalcification detection in Digital Breast Tomosynthesis. Instead of applying the straight-forward reconstruction/filtering/thresholding approach, the filtering is performed on projections before simple back-projection reconstruction. This leads to a reduced computation time since the number of projections is generally much smaller than the number of slices. For an average breast thickness and a typical number of projections, the number of operations is reduced by a factor in the range of 2 to 4. At the same time, the approach yields a negligible decrease of the contrast to noise ratio in the reconstructed slices. Image segmentation results are presented and compared to the previous method as visual performance assessment.

Published
2007
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9. Micro-calcification detection in digital tomosynthesis mammography

Author

Frederick Wilson Wheeler, John Patrick Kaufhold, Serge Muller, A. G. Amitha Perera, Gero L. Peters, and Bernhard Erich Hermann Claus

Subjects
medicine.diagnostic_test, Pixel, business.industry, 3D reconstruction, medicine.disease, Digital Tomosynthesis Mammography, Computer-aided diagnosis, medicine, Mammography, Computer vision, Microcalcification, Artificial intelligence, medicine.symptom, Projection (set theory), business, Mathematics, Calcification
Abstract

A novel technique for the detection and enhancement of microcalcifications in digital tomosynthesis mammography (DTM) is presented. In this method, the DTM projection images are used directly, instead of using a 3D reconstruction. Calcification residual images are computed for each of the projection images. Calcification detection is then performed over 3D space, based on the values of the calcification residual images at projection points for each 3D point under test. The quantum, electronic, and tissue noise variance at each pixel in each of the calcification residuals is incorporated into the detection algorithm. The 3D calcification detection algorithm finds a minimum variance estimate of calcification attenuation present in 3D space based on the signal and variance of the calcification residual images at the corresponding points in the projection images. The method effectively detects calcifications in 3D in a way that both ameliorates the difficulties of joint tissue/microcalcification tomosynthetic reconstruction (streak artifacts, etc.) and exploits the well understood image properties of microcalcifications as they appear in 2D mammograms. In this method, 3D reconstruction and calcification detection and enhancement are effectively combined to create a calcification detection specific reconstruction. Motivation and details of the technique and statistical results for DTM data are provided.

Published
2006
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10. Reconstruction-Independent 3D CAD for Calcification Detection in Digital Breast Tomosynthesis Using Fuzzy Particles

Author

Gero L. Peters, Frederick Wilson Wheeler, Serge Muller, Sylvain Bernard, Razvan Iordache, and Isabelle Bloch

Subjects
Digital mammography, Computer science, business.industry, Mammary gland, Fuzzy set, Image processing, Digital Breast Tomosynthesis, Filter (signal processing), Iterative reconstruction, medicine.disease, Fuzzy logic, Thresholding, medicine.anatomical_structure, medicine, Computer vision, Microcalcification, Artificial intelligence, medicine.symptom, business, Calcification
Abstract

In this paper we present a novel approach for microcalcification detection in Digital Breast Tomosynthesis (DBT) datasets. A reconstruction-independent approach, working directly on the projected views, is proposed. Wavelet filter responses on the projections are thresholded and combined to obtain candidate microcalcifications. For each candidate, we create a fuzzy contour through a multi-level thresholding process. We introduce a fuzzy set definition for the class microcalcification contour that allows the computation of fuzzy membership values for each candidate contour. Then, an aggregation operator is presented that combines information over the complete set of projected views, resulting in 3D fuzzy particles. A final decision is made taking into account information acquired over a range of successive processing steps. A clinical example is provided that illustrates our approach. DBT still being a new modality, a similar published approach is not available for comparison and limited clinical data currently prevents a clinical evaluation of the algorithm. .

Published
2005
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