المؤلفون: Corinna Grasemann, Jakob Höppner, Peter Burgard, Michael M. Schündeln, Nora Matar, Gabriele Müller, Heiko Krude, Reinhard Berner, Min Ae Lee-Kirsch, Fabian Hauck, Kerstin Wainwright, Sylvana Baumgarten, Janet Atinga, Jens J. Bauer, Eva Manka, Julia Körholz, Cordula Kiewert, André Heinen, Tanita Kretschmer, Tobias Kurth, Janna Mittnacht, Christoph Schramm, Christoph Klein, Holm Graessner, Olaf Hiort, Ania C. Muntau, Annette Grüters, Georg F. Hoffmann, Daniela Choukair

المصدر: Orphanet Journal of Rare Diseases, Vol 18, Iss 1, Pp 1-9 (2023)

مصطلحات موضوعية: Transition, Rare disease, Pathway, Empowerment, Health literacy, Adolescent health, Medicine

الوصف: Abstract Purpose The transition process from paediatric/adolescent to adult medical care settings is of utmost importance for the future health of adolescents with chronic diseases and poses even more difficulties in the context of rare diseases (RDs). Paediatric care teams are challenged to deliver adolescent-appropriate information and structures. Here we present a structured transition pathway which is patient-focused and adoptable for different RDs. Methods The transition pathway for adolescents 16 years and older was developed and implemented as part of a multi-centre study in 10 university hospitals in Germany. Key elements of the pathway included: assessment of patients’ disease-related knowledge and needs, training/educational and counselling sessions, a structured epicrisis and a transfer appointment jointly with the paediatric and adult specialist. Specific care coordinators from the participating university hospitals were in charge of organization and coordination of the transition process. Results Of a total of 292 patients, 286 completed the pathway. Deficits in disease-specific knowledge were present in more than 90% of participants. A need for genetic or socio-legal counselling was indicated by > 60%. A mean of 2.1 training sessions per patient were provided over a period of almost 1 year, followed by the transfer to adult care in 267 cases. Twelve patients remained in paediatric care as no adult health care specialist could be identified. Targeted training and counselling resulted in improved disease-specific knowledge and contributed to empowering of patients. Conclusion The described transition pathway succeeds to improve health literacy in adolescents with RDs and can be implemented by paediatric care teams in any RD specialty. Patient empowerment was mainly achieved by individualized training and counselling.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/1750-1172Test

الوصول الحر: https://doaj.org/article/ef5f9b76b7484569ab9e82d3e5536374Test

المؤلفون: Laura Kalveram, Gunnar Kleinau, Kamila Szymańska, Patrick Scheerer, Adolfo Rivero-Müller, Annette Grüters-Kieslich, Heike Biebermann

المصدر: International Journal of Molecular Sciences, Vol 20, Iss 22, p 5564 (2019)

مصطلحات موضوعية: central congenital hypothyroidism, g-protein coupled receptors, thyroid-stimulating hormone, tshr, Biology (General), QH301-705.5, Chemistry, QD1-999

الوصف: (1) Background: Central congenital hypothyroidism (CCH) is a rare endocrine disorder that can be caused by mutations in the β-subunit of thyrotropin (TSHB). The TSHB mutation C105Vfs114X leads to isolated thyroid-stimulating-hormone-(TSH)-deficiency and results in a severe phenotype. The aim of this study was to gain more insight into the underlying molecular mechanism and the functional effects of this mutation based on two assumptions: a) the three-dimensional (3D) structure of TSH should be modified with the C105V substitution, and/or b) whether the C-terminal modifications lead to signaling differences. (2) Methods: wild-type (WT) and different mutants of hTSH were generated in human embryonic kidney 293 cells (HEK293 cells) and TSH preparations were used to stimulate thyrotropin receptor (TSHR) stably transfected into follicular thyroid cancer cells (FTC133-TSHR cells) and transiently transfected into HEK293 cells. Functional characterization was performed by determination of Gs, mitogen activated protein kinase (MAPK) and Gq/11 activation. (3) Results: The patient mutation C105Vfs114X and further designed TSH mutants diminished cyclic adenosine monophosphate (cAMP) signaling activity. Surprisingly, MAPK signaling for all mutants was comparable to WT, while none of the mutants induced PLC activation. (4) Conclusion: We characterized the patient mutation C105Vfs114X concerning different signaling pathways. We identified a strong decrease of cAMP signaling induction and speculate that this could, in combination with diverse signaling regarding the other pathways, accounting for the patient’s severe phenotype.

وصف الملف: electronic resource

العلاقة: https://www.mdpi.com/1422-0067/20/22/5564Test; https://doaj.org/toc/1422-0067Test

الوصول الحر: https://doaj.org/article/98e240326f184b89b34f78bde5d32406Test

المؤلفون: Jessica Mühlhaus, Juliane Dinter, Sabine Jyrch, Alexander Teumer, Simon F. Jacobi, Georg Homuth, Peter Kühnen, Susanna Wiegand, Annette Grüters, Henry Völzke, Klemens Raile, Gunnar Kleinau, Heiko Krude, Heike Biebermann

المصدر: Frontiers in Pharmacology, Vol 8 (2017)

مصطلحات موضوعية: trace amine-associated receptor 1, variants, weight regulation, glucose homeostasis, signal transduction, Therapeutics. Pharmacology, RM1-950

الوصف: Activation of trace amine-associated receptor 1 (TAAR1) in endocrine pancreas is involved in weight regulation and glucose homeostasis. The purpose of this study was the identification and characterization of potential TAAR1 variants in patients with overweight/obesity and disturbed glucose homeostasis. Screening for TAAR1 variants was performed in 314 obese or overweight patients with impaired insulin secretion. The detected variants were functionally characterized concerning TAAR1 cell surface expression and signaling properties and their allele frequencies were determined in the population-based Study of Health in Pomerania (SHIP). Three heterozygous carriers of the single nucleotide missense variants p.Arg23Cys (R23C, rs8192618), p.Ser49Leu (S49L, rs140960896), and p.Ille171Leu (I171L, rs200795344) were detected in the patient cohort. While p.Ser49Leu and p.Ille171Leu were found in obese/overweight patients with slightly impaired glucose homeostasis, p.Arg23Cys was identified in a patient with a complete loss of insulin production. Functional in vitro characterization revealed a like wild-type function for I171L, partial loss of function for S49L and a complete loss of function for R23C. The frequency of the R23C variant in 2018 non-diabetic control individuals aged 60 years and older in the general population-based SHIP cohort was lower than in the analyzed patient sample. Both variants are rare in the general population indicating a recent origin in the general gene pool and/or the consequence of pronounced purifying selection, in line with the obvious detrimental effect of the mutations. In conclusion, our study provides hints for the existence of naturally occurring TAAR1 variants with potential relevance for weight regulation and glucose homeostasis.

وصف الملف: electronic resource

العلاقة: http://journal.frontiersin.org/article/10.3389/fphar.2017.00807/fullTest; https://doaj.org/toc/1663-9812Test

الوصول الحر: https://doaj.org/article/70f71652672f496dac3d4a66943fb522Test

المؤلفون: Anne Müller, Lars Niederstadt, Wenke Jonas, Chun-Xia Yi, Franziska Meyer, Petra Wiedmer, Jana Fischer, Carsten Grötzinger, Annette Schürmann, Matthias Tschöp, Gunnar Kleinau, Annette Grüters, Heiko Krude, Heike Biebermann

المصدر: Frontiers in Endocrinology, Vol 7 (2016)

مصطلحات موضوعية: Inflammation, G protein coupled receptor, protein network, weight regulation, Protein complementation assay, Diseases of the endocrine glands. Clinical endocrinology, RC648-665

الوصف: Intact melanocortin signaling via the G protein-coupled receptors (GPCRs) melanocortin receptor 4 (MC4R) and melanocortin receptor 3 (MC3R) is crucial for body weight maintenance. So far, no connection between melanocortin signaling and hypothalamic inflammation has been reported. Using a bimolecular fluorescence complementation library screen, we identified a new interaction partner for these receptors, ring finger protein 11 (RNF11). RNF11 participates in the constitution of the A20 complex that is involved in reduction of tumor necrosis factor F-induced NFB signaling, an important pathway in hypothalamic inflammation. Mice treated with high-fat diet (HFD) for 3 days demonstrated a trend toward an increase in hypothalamic Rnf11 expression, as shown for other inflammatory markers under HFD. Furthermore, Gs-mediated signaling of MC3/4R was demonstrated to be strongly reduced to 20 - 40% by co-expression of RNF11 despite unchanged total receptor expression. Cell surface expression was not affected for MC3R but resulted in a significant reduction of MC4R to 61% by co-expression with RNF11.Mechanisms linking HFD, inflammation, and metabolism remain partially understood. In this study, a new axis between signaling of specific body weight regulating GPCRs and factors involved in hypothalamic inflammation is suggested.

وصف الملف: electronic resource

العلاقة: http://journal.frontiersin.org/Journal/10.3389/fendo.2016.00109/fullTest; https://doaj.org/toc/1664-2392Test

الوصول الحر: https://doaj.org/article/96d82d05fe2d4aada5986c9637c38bf6Test

المؤلفون: Annette Grüters-Kieslich, Toni Torresani, Daniel Konrad

المصدر: International Journal of Neonatal Screening, Vol 3, Iss 3, p 18 (2017)

مصطلحات موضوعية: n/a, Pediatrics, RJ1-570

الوصف: On 26 June 2017 Prof. Dr. Ruth Illig peacefully passed away after a life fulfilled with an untiring commitment for children with endocrine diseases. She has been an enthusiastic fighter for the improvement of child health not only in Europe, but also with a global perspective.[...]

وصف الملف: electronic resource

العلاقة: https://www.mdpi.com/2409-515X/3/3/18Test; https://doaj.org/toc/2409-515XTest

الوصول الحر: https://doaj.org/article/de6f0ecd9d8a40f28d9c478969889667Test

المؤلفون: Juliane Dinter, Jessica Mühlhaus, Carolin Leonie Wienchol, Chun-Xia Yi, Daniela Nürnberg, Silke Morin, Annette Grüters, Josef Köhrle, Torsten Schöneberg, Matthias Tschöp, Heiko Krude, Gunnar Kleinau, Heike Biebermann

المصدر: PLoS ONE, Vol 10, Iss 2, p e0117774 (2015)

مصطلحات موضوعية: Medicine, Science

الوصف: Application of 3-iodothyronamine (3-T1AM) results in decreased body temperature and body weight in rodents. The trace amine-associated receptor (TAAR) 1, a family A G protein-coupled receptor, is a target of 3-T1AM. However, 3-T1AM effects still persist in mTaar1 knockout mice, which suggest so far unknown further receptor targets that are of physiological relevance. TAAR5 is a highly conserved TAAR subtype among mammals and we here tested TAAR5 as a potential 3-T1AM target. First, we investigated mouse Taar5 (mTaar5) expression in several brain regions of the mouse in comparison to mTaar1. Secondly, to unravel the full spectrum of signaling capacities, we examined the distinct Gs-, Gi/o-, G12/13-, Gq/11- and MAP kinase-mediated signaling pathways of mouse and human TAAR5 under ligand-independent conditions and after application of 3-T1AM. We found overlapping localization of mTaar1 and mTaar5 in the amygdala and ventromedial hypothalamus of the mouse brain. Second, the murine and human TAAR5 (hTAAR5) display significant basal activity in the Gq/11 pathway but show differences in the basal activity in Gs and MAP kinase signaling. In contrast to mTaar5, 3-T1AM application at hTAAR5 resulted in significant reduction in basal IP3 formation and MAP kinase signaling. In conclusion, our data suggest that the human TAAR5 is a target for 3-T1AM, exhibiting inhibitory effects on IP3 formation and MAP kinase signaling pathways, but does not mediate Gs signaling effects as observed for TAAR1. This study also indicates differences between TAAR5 orthologs with respect to their signaling profile. In consequence, 3-T1AM-mediated effects may differ between rodents and humans.

وصف الملف: electronic resource

العلاقة: http://europepmc.org/articles/PMC4382497?pdf=renderTest; https://doaj.org/toc/1932-6203Test

الوصول الحر: https://doaj.org/article/b0c02509514947a08b8c1bd908f4a23fTest

المؤلفون: Anne Müller, Gunnar Kleinau, Carolin L Piechowski, Timo D Müller, Brian Finan, Juliane Pratzka, Annette Grüters, Heiko Krude, Matthias Tschöp, Heike Biebermann

المصدر: PLoS ONE, Vol 8, Iss 1, p e53347 (2013)

مصطلحات موضوعية: Medicine, Science

الوصف: The G-protein coupled receptor 83 (GPR83) is an orphan G-protein coupled receptor for which the natural ligand(s) and signaling pathway(s) remain to be identified. Previous studies suggest a role of GPR83 in the regulation of thermogenesis and the control of circulating adiponectin. The aim of this study was to gain insights into the molecular underpinnings underlying GPR83 signaling. In particular, we aimed to assess the underlying G-protein activated signaling pathway of GPR83 and how this pathway is affected by mutational activation and zinc(II) challenge. Finally, we assessed the capacity of GPR83 for homodimerization. Our results show for the first time that mouse (m) GPR83 has high basal Gq/11 activity without affecting Gi or Gs signaling. Furthermore, we found that, under physiological conditions, zinc(II) (but not calcium(II) and magnesium(II)) potently activates mGPR83, thus identifying zinc(II) as an endogenous molecule with agonistic capability to activate mGPR83. In line with the observation that zinc(II)-ions activate mGPR83, we identified a cluster of ion-binding sensitive amino acids (e.g. His145, His204, Cys207, Glu217) in an activation sensitive receptor region of mGPR83. The occurrence of a constitutive activating mutant and a zinc(II)-binding residue at the N-terminal part corroborate the importance of this region in mGPR83 signal regulation. Finally, our results indicate that mGPR83 forms homodimers, which extend the current knowledge and molecular facets of GPR83 signaling.

وصف الملف: electronic resource

العلاقة: http://europepmc.org/articles/PMC3546042?pdf=renderTest; https://doaj.org/toc/1932-6203Test

الوصول الحر: https://doaj.org/article/df7ca2fcedc64695af946ea4c4590a8cTest

المؤلفون: Gunnar Kleinau, Juliane Pratzka, Daniela Nürnberg, Annette Grüters, Dagmar Führer-Sakel, Heiko Krude, Josef Köhrle, Torsten Schöneberg, Heike Biebermann

المصدر: PLoS ONE, Vol 6, Iss 10, p e27073 (2011)

مصطلحات موضوعية: Medicine, Science

الوصف: Trace amine-associated receptors (TAAR) are rhodopsin-like G-protein-coupled receptors (GPCR). TAAR are involved in modulation of neuronal, cardiac and vascular functions and they are potentially linked with neurological disorders like schizophrenia and Parkinson's disease. Subtype TAAR1, the best characterized TAAR so far, is promiscuous for a wide set of ligands and is activated by trace amines tyramine (TYR), phenylethylamine (PEA), octopamine (OA), but also by thyronamines, dopamine, and psycho-active drugs. Unfortunately, effects of trace amines on signaling of the two homologous β-adrenergic receptors 1 (ADRB1) and 2 (ADRB2) have not been clarified yet in detail. We, therefore, tested TAAR1 agonists TYR, PEA and OA regarding their effects on ADRB1/2 signaling by co-stimulation studies. Surprisingly, trace amines TYR and PEA are partial allosteric antagonists at ADRB1/2, whereas OA is a partial orthosteric ADRB2-antagonist and ADRB1-agonist. To specify molecular reasons for TAAR1 ligand promiscuity and for observed differences in signaling effects on particular aminergic receptors we compared TAAR, tyramine (TAR) octopamine (OAR), ADRB1/2 and dopamine receptors at the structural level. We found especially for TAAR1 that the remarkable ligand promiscuity is likely based on high amino acid similarity in the ligand-binding region compared with further aminergic receptors. On the other hand few TAAR specific properties in the ligand-binding site might determine differences in ligand-induced effects compared to ADRB1/2. Taken together, this study points to molecular details of TAAR1-ligand promiscuity and identified specific trace amines as allosteric or orthosteric ligands of particular β-adrenergic receptor subtypes.

وصف الملف: electronic resource

العلاقة: http://europepmc.org/articles/PMC3205048?pdf=renderTest; https://doaj.org/toc/1932-6203Test

الوصول الحر: https://doaj.org/article/7feb377e88ba4fefae1774c050705914Test

المؤلفون: Axel Schmidt, Magdalena Danyel, Kathrin Grundmann, Theresa Brunet, Hannah Klinkhammer, Tzung-Chien Hsieh, Hartmut Engels, Sophia Peters, Alexej Knaus, Shahida Moosa, Luisa Averdunk, Felix Boschann, Henrike Sczakiel, Sarina Schwartzmann, Martin Atta Mensah, Jean Tori Pantel, Manuel Holtgrewe, Annemarie Bösch, Claudia Weiß, Natalie Weinhold, Aude-Annick Suter, Corinna Stoltenburg, Julia Neugebauer, Tillmann Kallinich, Angela M. Kaindl, Susanne Holzhauer, Christoph Bührer, Philip Bufler, Uwe Kornak, Claus-Eric Ott, Markus Schülke, Hoa Huu Phuc Nguyen, Sabine Hoffjan, Corinna Grasemann, Tobias Rothoeft, Folke Brinkmann, Nora Matar, Sugirthan Sivalingam, Claudia Perne, Elisabeth Mangold, Martina Kreiss, Kirsten Cremer, Regina C. Betz, Tim Bender, Martin Mücke, Lorenz Grigull, Thomas Klockgether, Spier Isabel, Heimbach André, Bender Tim, Fabian Brand, Christiane Stieber, Alexandra Marzena Morawiec, Pantelis Karakostas, Valentin S. Schäfer, Sarah Bernsen, Patrick Weydt, Sergio Castro-Gomez, Ahmad Aziz, Marcus Grobe-Einsler, Okka Kimmich, Xenia Kobeleva, Demet Önder, Hellen Lesmann, Sheetal Kumar, Pawel Tacik, Min Ae Lee-Kirsch, Reinhard Berner, Catharina Schuetz, Julia Körholz, Tanita Kretschmer, Nataliya Di Donato, Evelin Schröck, André Heinen, Ulrike Reuner, Amalia-Mihaela Hanßke, Frank J. Kaiser, Eva Manka, Martin Munteanu, Alma Kuechler, Kiewert Cordula, Raphael Hirtz, Elena Schlapakow, Christian Schlein, Jasmin Lisfeld, Christian Kubisch, Theresia Herget, Maja Hempel, Christina Weiler-Normann, Kurt Ullrich, Christoph Schramm, Cornelia Rudolph, Franziska Rillig, Maximilian Groffmann, Ania Muntau, Alexandra Tibelius, Eva M. C. Schwaibold, Christian P. Schaaf, Michal Zawada, Lilian Kaufmann, Katrin Hinderhofer, Pamela M. Okun, Urania Kotzaeridou, Georg F. Hoffmann, Daniela Choukair, Markus Bettendorf, Malte Spielmann, Annekatrin Ripke, Martje Pauly, Alexander Münchau, Katja Lohmann, Irina Hüning, Britta Hanker, Tobias Bäumer, Rebecca Herzog, Yorck Hellenbroich, Dominik S. Westphal, Tim Strom, Reka Kovacs, Korbinian M. Riedhammer, Katharina Mayerhanser, Elisabeth Graf, Melanie Brugger, Julia Hoefele, Konrad Oexle, Nazanin Mirza-Schreiber, Riccardo Berutti, Ulrich Schatz, Martin Krenn, Christine Makowski, Heike Weigand, Sebastian Schröder, Meino Rohlfs, Vill Katharina, Fabian Hauck, Ingo Borggraefe, Wolfgang Müller-Felber, Ingo Kurth, Miriam Elbracht, Cordula Knopp, Matthias Begemann, Florian Kraft, Johannes R. Lemke, Julia Hentschel, Konrad Platzer, Vincent Strehlow, Rami Abou Jamra, Martin Kehrer, German Demidov, Stefanie Beck-Wödl, Holm Graessner, Marc Sturm, Lena Zeltner, Ludger J. Schöls, Janine Magg, Andrea Bevot, Christiane Kehrer, Nadja Kaiser, Denise Horn, Annette Grüters-Kieslich, Christoph Klein, Stefan Mundlos, Markus Nöthen, Olaf Riess, Thomas Meitinger, Heiko Krude, Peter M. Krawitz, Tobias Haack, Nadja Ehmke, Matias Wagner

الوصف: Most individuals with rare diseases initially consult their primary care physician. For a subset of rare diseases, efficient diagnostic pathways are available. However, ultra-rare diseases often require both expert clinical knowledge and comprehensive genetic diagnostics, which poses structural challenges for public healthcare systems. To address these challenges within Germany, a novel structured diagnostic concept, based on multidisciplinary expertise at established university hospital centers for rare diseases (CRDs), was evaluated in the three year prospective study TRANSLATE NAMSE. A key goal of TRANSLATE NAMSE was to assess the clinical value of exome sequencing (ES) in the ultra-rare disease population. The aims of the present study were to perform a systematic investigation of the phenotypic and molecular genetic data of TRANSLATE NAMSE patients who had undergone ES in order to determine the yield of both ultra-rare diagnoses and novel gene-disease associations; and determine whether the complementary use of machine learning and artificial intelligence (AI) tools improved diagnostic effectiveness and efficiency.ES was performed for 1,577 patients (268 adult and 1,309 pediatric). Molecular genetic diagnoses were established in 499 patients (74 adult and 425 pediatric). A total of 370 distinct molecular genetic causes were established. The majority of these concerned known disorders, most of which were ultra-rare. During the diagnostic process, 34 novel and 23 candidate genotype-phenotype associations were delineated, mainly in individuals with neurodevelopmental disorders.To determine the likelihood that ES will lead to a molecular diagnosis in a given patient, based on the respective clinical features only, we developed a statistical framework called YieldPred. The genetic data of a subcohort of 224 individuals that also gave consent to the computer-assisted analysis of their facial images were processed with the AI tool Prioritization of Exome Data by Image Analysis (PEDIA) and showed superior performance in variant prioritization.The present analyses demonstrated that the novel structured diagnostic concept facilitated the identification of ultra-rare genetic disorders and novel gene-disease associations on a national level and that the machine learning and AI tools improved diagnostic effectiveness and efficiency for ultra-rare genetic disorders.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::51d2fffa10e3858a273179e9636175f6Test
https://doi.org/10.1101/2023.04.19.23288824Test

المؤلفون: Franziska Rillig, Annette Grüters, Christoph Schramm, Heiko Krude

المصدر: Dtsch Arztebl Int

مصطلحات موضوعية: Adult, Rare Diseases, Adolescent, Exome Sequencing, Humans, Original Article, General Medicine, Prospective Studies, Registries

الوصف: BACKGROUND: Patients with rare diseases often undergo a diagnostic odyssey that can last many years until the diagnosis is definitively established. To improve the diagnosis and treatment of these patients, the German National Task Force for Patients With Rare Diseases (Nationales Aktionsbündnis für Menschen mit Seltenen Erkrankungen, NAMSE) has recommended the creation of Rare Disease Centers (RDCs). METHODS: As part of the joint Translate-NAMSE project, sponsored by the G-BA Innovation Fund (G-BA, German Federal Joint Committee), we investigated the performance of RDCs in establishing the diagnosis of patients suspected to have a rare disease. The results of interdisciplinary case conferences and of exome diagnostic tests were analyzed in a prospective, multicenter observational study. RESULTS: A total of 5652 patients (of whom 3619 were under 18 years old, and 2033 were at least 18 years old) from 10 RDCs who did not yet have a definitive diagnosis of a rare disease were included in the study. On average, those who were under 18 years old had been symptomatic for 4.5 years without receiving a diagnosis in a standard care setting; the analogous figure for adult patients was 8.2 years. Over the course of this project (2017–2021), 1682 patients (30%) received a definitive diagnosis. 193 had a common disease, 88 had a psychosomatic disease (only in patients who were at least 18 years old), and 1401 had a rare disease. 14 850 case conferences were conducted. 1599 exome analyses led to 506 definitive genetic diagnoses (32%). CONCLUSION: A diagnostic evaluation with the aid of interdisciplinary case conferences and the opportunity for exome analysis can be of benefit to people with rare diseases who have not received a definitive diagnosis in a standard care setting. Further improvement of the diagnosis rate can come from whole-genome analysis and from the introduction of an international registry.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c164912a21bb8e9b6aad2500f90deb93Test
https://europepmc.org/articles/PMC9664985Test/