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959 Publications visible to you, out of a total of 959
Populational equilibrium through exosome-mediated Wnt signaling in tumor progression of diffuse large B-cell lymphoma.
GLA - German Lymphoma Alliance

Abstract (Expand)

Tumors are composed of phenotypically heterogeneous cell populations. The nongenomic mechanisms underlying transitions and interactions between cell populations are largely unknown. Here, we show that … diffuse large B-cell lymphomas possess a self-organized infrastructure comprising side population (SP) and non-SP cells, where transitions between clonogenic states are modulated by exosome-mediated Wnt signaling. DNA methylation modulated SP-non-SP transitions and was correlated with the reciprocal expressions of Wnt signaling pathway agonist Wnt3a in SP cells and the antagonist secreted frizzled-related protein 4 in non-SP cells. Lymphoma SP cells exhibited autonomous clonogenicity and exported Wnt3a via exosomes to neighboring cells, thus modulating population equilibrium in the tumor.

Authors: R. Koch, M. Demant, T. Aung, N. Diering, A. Cicholas, B. Chapuy, D. Wenzel, M. Lahmann, A. Guntsch, C. Kiecke, S. Becker, T. Hupfeld, V. Venkataramani, M. Ziepert, L. Opitz, W. Klapper, L. Trumper, G. G. Wulf

Date Published: 3rd Apr 2014

Publication Type: Not specified

Human Diseases: diffuse large B-cell lymphoma

Parenthood in long-term survivors after CHOP with or without etoposide treatment for aggressive lymphoma.
GLA - German Lymphoma Alliance

Abstract

Not specified

Authors: J. Meissner, D. Tichy, S. Dietrich, T. Schmitt, M. Ziepert, E. Kuhnt, T. Rixecker, M. Witzens-Harig, M. Pfreundschuh, A. D. Ho

Date Published: 3rd Apr 2014

Publication Type: Not specified

Human Diseases: lymphoma

DNA glycosylases involved in base excision repair may be associated with cancer risk in BRCA1 and BRCA2 mutation carriers
GC-HBOC - German Consortium for Hereditary Breast and Ovarian Cancer

Abstract (Expand)

Single Nucleotide Polymorphisms (SNPs) in genes involved in the DNA Base Excision Repair (BER) pathway could be associated with cancer risk in carriers of mutations in the high-penetrance susceptibility … genes BRCA1 and BRCA2, given the relation of synthetic lethality that exists between one of the components of the BER pathway, PARP1 (poly ADP ribose polymerase), and both BRCA1 and BRCA2. In the present study, we have performed a comprehensive analysis of 18 genes involved in BER using a tagging SNP approach in a large series of BRCA1 and BRCA2 mutation carriers. 144 SNPs were analyzed in a two stage study involving 23,463 carriers from the CIMBA consortium (the Consortium of Investigators of Modifiers of BRCA1 and BRCA2). Eleven SNPs showed evidence of association with breast and/or ovarian cancer at p\textless0.05 in the combined analysis. Four of the five genes for which strongest evidence of association was observed were DNA glycosylases. The strongest evidence was for rs1466785 in the NEIL2 (endonuclease VIII-like 2) gene (HR: 1.09, 95% CI (1.03-1.16), p = 2.7 \times 10(-3)) for association with breast cancer risk in BRCA2 mutation carriers, and rs2304277 in the OGG1 (8-guanine DNA glycosylase) gene, with ovarian cancer risk in BRCA1 mutation carriers (HR: 1.12 95%CI: 1.03-1.21, p = 4.8 \times 10(-3)). DNA glycosylases involved in the first steps of the BER pathway may be associated with cancer risk in BRCA1/2 mutation carriers and should be more comprehensively studied.

Authors: Ana Osorio, Roger L. Milne, Karoline Kuchenbaecker, Tereza Vaclová, Guillermo Pita, Rosario Alonso, Paolo Peterlongo, Ignacio Blanco, Miguel de La Hoya, Mercedes Duran, Orland Díez, Teresa Ramón y Cajal, Irene Konstantopoulou, Cristina Martínez-Bouzas, Raquel Andrés Conejero, Penny Soucy, Lesley McGuffog, Daniel Barrowdale, Andrew Lee, Swe-Brca, Brita Arver, Johanna Rantala, Niklas Loman, Hans Ehrencrona, Olufunmilayo I. Olopade, Mary S. Beattie, Susan M. Domchek, Katherine Nathanson, Timothy R. Rebbeck, Banu K. Arun, Beth Y. Karlan, Christine Walsh, Jenny Lester, Esther M. John, Alice S. Whittemore, Mary B. Daly, Melissa Southey, John Hopper, Mary B. Terry, Saundra S. Buys, Ramunas Janavicius, Cecilia M. Dorfling, Elizabeth J. van Rensburg, Linda Steele, Susan L. Neuhausen, Yuan Chun Ding, Thomas v. O. Hansen, Lars Jønson, Bent Ejlertsen, Anne-Marie Gerdes, Mar Infante, Belén Herráez, Leticia Thais Moreno, Jeffrey N. Weitzel, Josef Herzog, Kisa Weeman, Siranoush Manoukian, Bernard Peissel, Daniela Zaffaroni, Giulietta Scuvera, Bernardo Bonanni, Frederique Mariette, Sara Volorio, Alessandra Viel, Liliana Varesco, Laura Papi, Laura Ottini, Maria Grazia Tibiletti, Paolo Radice, Drakoulis Yannoukakos, Judy Garber, Steve Ellis, Debra Frost, Radka Platte, Elena Fineberg, Gareth Evans, Fiona Lalloo, Louise Izatt, Ros Eeles, Julian Adlard, Rosemarie Davidson, Trevor Cole, Diana Eccles, Jackie Cook, Shirley Hodgson, Carole Brewer, Marc Tischkowitz, Fiona Douglas, Mary Porteous, Lucy Side, Lisa Walker, Patrick Morrison, Alan Donaldson, John Kennedy, Claire Foo, Andrew K. Godwin, Rita Katharina Schmutzler, Barbara Wappenschmidt, Kerstin Rhiem, Christoph Engel, Alfons Meindl, Nina Ditsch, Norbert Arnold, Hans Jörg Plendl, Dieter Niederacher, Christian Sutter, Shan Wang-Gohrke, Doris Steinemann, Sabine Preisler-Adams, Karin Kast, Raymonda Varon-Mateeva, Andrea Gehrig, Dominique Stoppa-Lyonnet, Olga M. Sinilnikova, Sylvie Mazoyer, Francesca Damiola, Bruce Poppe, Kathleen Claes, Marion Piedmonte, Kathy Tucker, Floor Backes, Gustavo Rodríguez, Wendy Brewster, Katie Wakeley, Thomas Rutherford, Trinidad Caldés, Heli Nevanlinna, Kristiina Aittomäki, Matti A. Rookus, Theo A. M. van Os, Lizet van der Kolk, J. L. de Lange, Hanne E. J. Meijers-Heijboer, A. H. van der Hout, Christi J. van Asperen, Encarna B. Gómez Garcia, Nicoline Hoogerbrugge, J. Margriet Collée, Carolien H. M. van Deurzen, Rob B. van der Luijt, Peter Devilee, Hebon, Edith Olah, Conxi Lázaro, Alex Teulé, Mireia Menéndez, Anna Jakubowska, Cezary Cybulski, Jacek Gronwald, Jan Lubinski, Katarzyna Durda, Katarzyna Jaworska-Bieniek, Oskar Th Johannsson, Christine Maugard, Marco Montagna, Silvia Tognazzo, Manuel R. Teixeira, Sue Healey, Kconfab Investigators, Curtis Olswold, Lucia Guidugli, Noralane Lindor, Susan Slager, Csilla I. Szabo, Joseph Vijai, Mark Robson, Noah Kauff, Liying Zhang, Rohini Rau-Murthy, Anneliese Fink-Retter, Christian F. Singer, Christine Rappaport, Daphne Geschwantler Kaulich, Georg Pfeiler, Muy-Kheng Tea, Andreas Berger, Catherine M. Phelan, Mark H. Greene, Phuong L. Mai, Flavio Lejbkowicz, Irene Andrulis, Anna Marie Mulligan, Gord Glendon, Amanda Ewart Toland, Anders Bojesen, Inge Sokilde Pedersen, Lone Sunde, Mads Thomassen, Torben A. Kruse, Uffe Birk Jensen, Eitan Friedman, Yael Laitman, Shani Paluch Shimon, Jacques Simard, Douglas F. Easton, Kenneth Offit, Fergus J. Couch, Georgia Chenevix-Trench, Antonis C. Antoniou, Javier Benitez

Date Published: 3rd Apr 2014

Publication Type: Journal article

Human Diseases: hereditary breast ovarian cancer syndrome

Structural and functional MRI study of the brain, cognition and mood in long-term adequately treated Hashimoto's thyroiditis.
LIFE Adult

Abstract (Expand)

The current study investigated neuropsychological and underlying structural and functional brain alterations in long-term adequately treated patients with Hashimoto's thyroiditis in order to examine … much discussed residual complaints in patients in relation to possible long-term neural alterations with a specific interest in the underlying autoimmune process. Eighteen patients with treated hypothyroidism due to Hashimoto's thyroiditis (mean age 32, range 18-54 years; two males; mean treatment duration 4.4 years) and 18 healthy matched control subjects underwent 3-Tesla magnetic resonance imaging (MRI). Voxel-based morphometry was used to investigate grey matter density, resting-state functional MRI to analyse the brain connectivity of areas known to be altered in hypothyroidism and event-related functional MRI to examine brain activity during associative memory encoding. Neuropsychological assessment included memory, working memory, psychomotor speed and attention. We previously reported subclinically reduced mood in this study population and investigated its neural correlates here. Thyroid stimulating hormone, free triiodthyronine, free thyroxine and thyroid peroxidase antibodies were measured in serum. We did not find cognitive deficits or alterations in grey matter density, functional connectivity or associative memory-related brain activity in comparison to the control group and cognition was unrelated to thyroid serum measures in the patient group. Thyroid peroxidase antibodies in the patient group correlated with increased grey matter density in right amygdala and enhanced connectivity between subcallosal and parahippocampal areas. Treatment duration was associated with brain structure in frontal and occipital cortex and connectivity between left amygdala and frontal cortex. Mood correlated with brain areas associated with distinct functional networks, but not with those most prominently affected in depression. In conclusion, no cognitive or neural alterations were detected in this young and otherwise healthy cohort of patients in comparison to a healthy control group and current mood status could not be related to depression-related networks. However, autoimmune activity and treatment duration showed a relationship with depression and hypothyroidism-related brain structure and function. They are thus promising factors to further investigate residual complaints despite biochemically adequate treatment in patients with Hashimoto's thyroiditis. Given the small sample size, all findings require replication.

Authors: E. M. Quinque, S. Karger, K. Arelin, M. L. Schroeter, J. Kratzsch, A. Villringer

Date Published: 19th Mar 2014

Publication Type: Not specified

Human Diseases: autoimmune thyroiditis, hypothyroidism

Further evidence for a role of S100B in mood disorders: a human gene expression mega-analysis.
LIFE Adult

Abstract

Not specified

Authors: M. L. Schroeter, J. Steiner, P. Schonknecht, K. Mueller

Date Published: 18th Mar 2014

Publication Type: Not specified

Human Diseases: mood disorder, neurotic disorder

Impact of compliance with infection management guidelines on outcome in patients with severe sepsis: a prospective observational multi-center study.
SepNet - German Competence Network Sepsis

Abstract (Expand)

INTRODUCTION: Current sepsis guidelines recommend antimicrobial treatment (AT) within one hour after onset of sepsis-related organ dysfunction (OD) and surgical source control within 12 hours. The … objective of this study was to explore the association between initial infection management according to sepsis treatment recommendations and patient outcome. METHODS: In a prospective observational multi-center cohort study in 44 German ICUs, we studied 1,011 patients with severe sepsis or septic shock regarding times to AT, source control, and adequacy of AT. Primary outcome was 28-day mortality. RESULTS: Median time to AT was 2.1 (IQR 0.8 - 6.0) hours and 3 hours (-0.1 - 13.7) to surgical source control. Only 370 (36.6%) patients received AT within one hour after OD in compliance with recommendation. Among 422 patients receiving surgical or interventional source control, those who received source control later than 6 hours after onset of OD had a significantly higher 28-day mortality than patients with earlier source control (42.9% versus 26.7%, P <0.001). Time to AT was significantly longer in ICU and hospital non-survivors; no linear relationship was found between time to AT and 28-day mortality. Regardless of timing, 28-day mortality rate was lower in patients with adequate than non-adequate AT (30.3% versus 40.9%, P < 0.001). CONCLUSIONS: A delay in source control beyond 6 hours may have a major impact on patient mortality. Adequate AT is associated with improved patient outcome but compliance with guideline recommendation requires improvement. There was only indirect evidence about the impact of timing of AT on sepsis mortality.

Authors: F. Bloos, D. Thomas-Ruddel, H. Ruddel, C. Engel, D. Schwarzkopf, J. C. Marshall, S. Harbarth, P. Simon, R. Riessen, D. Keh, K. Dey, M. Weiss, S. Toussaint, D. Schadler, A. Weyland, M. Ragaller, K. Schwarzkopf, J. Eiche, G. Kuhnle, H. Hoyer, C. Hartog, U. Kaisers, K. Reinhart

Date Published: 3rd Mar 2014

Publication Type: Not specified

Human Diseases: bacterial infectious disease

Genetic risk variants for dyslexia on chromosome 18 in a German cohort
Genetical Statistics and Systems Biology

Abstract (Expand)

Dyslexia is characterized by impaired reading and spelling. The disorder has a prevalence of about 5% in Germany, and a strong hereditary component. Several loci are thought to be involved in the … development of dyslexia. Scerri et al. identified eight potential dyslexia-associated single nucleotide polymorphisms (SNPs) in seven genes on chromosome 18 in an English-speaking population. Here, we present an association analysis that explores the relevance of these SNPs in a German population comprising 388 dyslexia cases and 364 control cases. In case-control analysis, three nominal SNP associations were replicated. The major alleles of NEDD4L-rs12606138 and NEDD4L-rs8094327 were risk associated [odds ratio (OR) = 1.35, 95% confidence interval (CI) = 1.0-1.7, P-value = 0.017 and OR = 1.39, 95% CI = 1.1-1.7, P-value = 0.007, respectively], and both SNPs were in strong linkage disequilibrium (r(2)  = 0.95). For MYO5B-rs555879, the minor allele was risk associated (OR = 1.31, 95% CI = 1.1-1.6, P-value = 0.011). The combined analysis of SNP sets using set enrichment analysis revealed a study-wide significant association for three SNPs with susceptibility for dyslexia. In summary, our results substantiate genetic markers in NEDD4L and MYO5B as risk factors for dyslexia and provide first evidence that the relevance of these markers is not restricted to the English language.

Authors: B. Mueller, P. Ahnert, J. Burkhardt, J. Brauer, I. Czepezauer, E. Quente, J. Boltze, A. Wilcke, H. Kirsten

Date Published: 1st Mar 2014

Publication Type: Journal article

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