Helmut Schäfer

The ANTOP study: focal psychodynamic psychotherapy, cognitive-behavioural therapy, and treatment-as-usual in outpatients with anorexia nervosa - a randomized controlled trial (2009)

Wild, Beate, Friederich, Hans-Christoph, Gross, Gaby, Teufel, Martin, Herzog, Wolfgang, Giel, Katrin E, ...

Abstract Background Anorexia nervosa is a serious eating disorder leading to high morbidity and mortality as a result of both malnutrition and suicide. The seriousness of the disorder requires...

Gastric inhibitory polypeptide receptor: association analyses for obesity of several polymorphisms in large study groups (2009)

Vogel, Carla IG, Scherag, André, Brönner, Günter, Nguyen, Thuy T, Wang, Hai-Jun, Grallert, Harald, ...

Abstract Background Gastric inhibitory polypeptide (GIP) is postulated to be involved in type 2 diabetes mellitus and obesity. It exerts its function through its receptor, GIPR. We genotyped three...

Non-replication of an association of CTNNBL1polymorphisms and obesity in a population of Central European ancestry (2009)

Vogel, Carla IG, Greene, Brandon, Scherag, André, Müller, Timo D, Friedel, Susann, Grallert, Harald, ...

Abstract Background A recent genome-wide association (GWA) study of U.S. Caucasians suggested that eight single nucleotide polymorphisms (SNPs) in CTNNBL1 are associated with obesity and increased...

Optimal multistage designs--a general framework for efficient genome-wide association studies (2009)

Pahl, Roman, Schäfer, Helmut, Müller, Hans-Helge

Genome-wide association studies (GWAS) have become increasingly affordable but they are still costly. Therefore, cost saving 2-stage designs were proposed in the literature. The restriction to 2...

Synthesis and Characterization of Upconversion Fluorescent Yb3+, Er3+ Doped CsY2F7 Nano- and Microcrystals (2009)

Helmut Schäfer, Pavel Ptacek, Henning Eickmeier, Markus Haase

Cs Y2F7: 78%   Y3+, 20%   Yb3+, 2%   Er3+ nanocrystals with a mean diameter of approximately 8 nm were synthesized at   185°C in the high boiling organic solvent...

Meta-analysis of genome-wide linkage scans of attention deficit hyperactivity disorder (In Special Issue on the Genetics of ADHD Dedicated to the Memory of Richard Todd) (2008)

Zhou, Kaixin, Dempfle, Astrid, Arcos-Burgos, Mauricio, Bakker, Steven C., Banaschewski, Tobias, Biederman, Joseph, ...

Genetic contribution to the development of attention deficit hyperactivity disorder (ADHD) is well established. Seven independent genome-wide linkage scans have been performed to map loci that...

Lack of association of genetic variants in genes of the endocannabinoid system with anorexia nervosa (2008)

Müller, Timo, Reichwald, Kathrin, Brönner, Günter, Kirschner, Jeanette, Nguyen, Thuy, Scherag, André, ...

Abstract Background Several lines of evidence indicate that the central cannabinoid receptor 1 (CNR1) as well as the major endocannabinoid degrading enzymes fatty acid amide hydrolase (FAAH),...

'Fat mass and obesity associated' gene (FTO): No significant association of variant rs9939609 with weight loss in a lifestyle intervention and lipid metabolism markers in German obese children and adolescents (2008)

Müller, Timo D, Hinney, Anke, Scherag, André, Nguyen, Thuy T, Schreiner, Felix, Schäfer, Helmut, ...

Abstract Background We have previously identified strong association of six single nucleotide polymorphisms (SNPs) in FTO (fat mass and obesity associated gene) to early onset extreme obesity within...

subsequent (2006)

Astrid Dempfle, Stefan A. Wudy, Kathrin Saar, Ra Hagemann, Susann Friedel, Lars D. Berthold, ...

Evidence for involvement of the vitamin D receptor gene in

Evidence for involvement of the vitamin D receptor gene in idiopathic short stature via a genome-wide linkage study and subsequent association studies (2006)

Dempfle, Astrid, Wudy, Stefan A., Saar, Kathrin, Hagemann, Sandra, Friedel, Susann, Scherag, André, ...

Stature is a highly heritable trait under both polygenic and major gene control. We aimed to identify genetic regions linked to idiopathic short stature (ISS) in childhood, through a whole genome...

Recommendations for the implemantation of the new German medical curriculum (27.6.2002) in the subjects Epidemiology, Medical Biometry and Medical Informatics (2005)

Hilgers, Ralf-Dieter, Feldmann, Uwe, Jöckel, Karl-Heinz, Klar, Rüdiger, Rienhoff, Otto, Schäfer, Helmut, ...

In the Approbationsordnung für Ärzte (German regulation for the Curriculum in Medicine) of 27th June, 2002 the disciplines Epidemiology, Medical Biometry and Medical Informatics are combined in one...

Reaktionsweisen eines Tetraaryldigermens (2001)

Schäfer, Helmut

Ziel der vorliegenden Arbeit war es, das erste Molekül mit konjugierten Ge-Ge-Doppelbindungen herzustellen. Dazu wurde zunächst eine ergiebige Synthese für ein Tetraaryldigermen erarbeitet und...

Normalisation of gene-expression data 13 (2001)

Biometric Society, Anne Whitehead, Lutz Edler, Hans-peter Piepho, Astrid Dempfle, Sabine Loesgen, ...

Some approaches for mapping quqantitative trait loci (QTL) in plant breeding populations 12

Mutual Interference of Adenovirus Infection and myc Expression†

Löhr, Kristina, Hartmann, Oliver, Schäfer, Helmut, Dobbelstein, Matthias

During infection with adenovirus, massive changes in the transcription of virus genes are observed, suggesting that the expression of cellular genes may also be modulated. To characterize the levels...

Optimized Group Sequential Study Designs for Tests of Genetic Linkage and Association in Complex Diseases

König, Inke R., Schäfer, Helmut, Müller, Hans-Helge, Ziegler, Andreas

The study of genetic linkage or association in complex traits requires large sample sizes, as the expected effect sizes are small and extremely low significance levels need to be adopted. One...

Mutual Interference of Adenovirus Infection and myc Expression†

Löhr, Kristina, Hartmann, Oliver, Schäfer, Helmut, Dobbelstein, Matthias

During infection with adenovirus, massive changes in the transcription of virus genes are observed, suggesting that the expression of cellular genes may also be modulated. To characterize the levels...

Melanocortin-4 Receptor Gene Variant I103 Is Negatively Associated with Obesity

Geller, Frank, Reichwald, Kathrin, Dempfle, Astrid, Illig, Thomas, Vollmert, Caren, Herpertz, Stephan, ...

Several rare mutations in the melanocortin-4 receptor gene (MC4R) predispose to obesity. For the most common missense variant V103I (rs2229616), however, the previously reported similar carrier...

Optimized Group Sequential Study Designs for Tests of Genetic Linkage and Association in Complex Diseases

König, Inke R., Schäfer, Helmut, Müller, Hans-Helge, Ziegler, Andreas

The study of genetic linkage or association in complex traits requires large sample sizes, as the expected effect sizes are small and extremely low significance levels need to be adopted. One...

Comparison of the power of haplotype-based versus single- and multilocus association methods for gene × environment (gene × sex) interactions and application to gene × smoking and gene × sex interactions in rheumatoid arthritis

Dempfle, Astrid, Hein, Rebecca, Beckmann, Lars, Scherag, André, Nguyen, Thuy Trang, Schäfer, Helmut, ...

Accounting for interactions with environmental factors in association studies may improve the power to detect genetic effects and may help identifying important environmental effect modifiers. The...