0000000000056627

AUTHOR

Daniel Merk

showing 3 related works from this author

Opposing Effects of CREBBP Mutations Govern the Phenotype of Rubinstein-Taybi Syndrome and Adult SHH Medulloblastoma

2018

Recurrent mutations in chromatin modifiers are specifically prevalent in adolescent or adult patients with Sonic hedgehog-associated medulloblastoma (SHH MB). Here, we report that mutations in the acetyltransferase CREBBP have opposing effects during the development of the cerebellum, the primary site of origin of SHH MB. Our data reveal that loss of Crebbp in cerebellar granule neuron progenitors (GNPs) during embryonic development of mice compromises GNP development, in part by downregulation of brain-derived neurotrophic factor (Bdnf). Interestingly, concomitant cerebellar hypoplasia was also observed in patients with Rubinstein-Taybi syndrome, a congenital disorder caused by germline mu…

0301 basic medicineCerebellumCrebbp protein mousemetabolism [Cerebellar Neoplasms]acetyltransferase; cerebellum; CREBBP; development; Rubinstein-Taybi syndrome; SHH medulloblastomagenetics [Hedgehog Proteins]MiceNeurotrophic factorsmetabolism [CREB-Binding Protein]Mice KnockoutNeuronsRubinstein-Taybi Syndromepathology [Rubinstein-Taybi Syndrome]CREBBPCREB-Binding ProteinPhenotypegenetics [CREB-Binding Protein]3. Good healthpathology [Cerebellar Neoplasms]acetyltransferasePhenotypemedicine.anatomical_structuregenetics [Rubinstein-Taybi Syndrome]Femalemetabolism [Hedgehog Proteins]Signal TransductionSHH medulloblastomaAdultcerebellumBiologyGeneral Biochemistry Genetics and Molecular BiologyCREBBP; Rubinstein-Taybi syndrome; SHH medulloblastoma; acetyltransferase; cerebellum; development.03 medical and health sciencesGermline mutationAcetyltransferasesmetabolism [Medulloblastoma]medicineAnimalsHumansgenetics [Cerebellar Neoplasms]Hedgehog Proteinsddc:610Cerebellar NeoplasmsdevelopmentMolecular BiologyMedulloblastomaRubinstein–Taybi syndromegenetics [Medulloblastoma]metabolism [Rubinstein-Taybi Syndrome]pathology [Medulloblastoma]Cell Biologymedicine.disease030104 developmental biologyMutationphysiology [CREB-Binding Protein]Cancer researchSHH protein humanCerebellar hypoplasia (non-human)metabolism [Acetyltransferases]CREBBP protein humanMedulloblastomaDevelopmental BiologyCongenital disorderDevelopmental Cell
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White Etching Crack Root Cause Investigations

2014

White etching crack (WEC) failure is distinct to classical fatigue and driven by the composition of lubricants under special loading conditions; for example, slippage and electricity. The white etching area (WEA) within WEC contains carbon supersaturated ferrite (bcc-iron) and carbides, with a size of a few nanometers. This article presents investigations supporting the hypothesis that WEC processes start within a failure-free period by successive accumulation of a structural distortion. This can be measured by acoustic emission. Failure statistics show a steep ascent in the Weibull diagram (s values beyond 1) leading to the assumption that WEC processes start unsuspicious, as one would see…

Materials scienceMechanical EngineeringMetallurgychemistry.chemical_elementSurfaces and InterfacesSurfaces Coatings and FilmsCarbideAcoustic emissionchemistryMechanics of MaterialsEtching (microfabrication)DistortionFerrite (iron)SlippageComposite materialCarbonWeibull distributionTribology Transactions
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Nonacidic Farnesoid X Receptor Modulators.

2017

As a cellular bile acid sensor, farnesoid X receptor (FXR) participates in regulation of bile acid, lipid and glucose homeostasis, and liver protection. Clinical results have validated FXR as therapeutic target in hepatic and metabolic diseases. To date, potent FXR agonists share a negatively ionizable function that might compromise their pharmacokinetic distribution and behavior. Here we report the development and characterization of a high-affinity FXR modulator not comprising an acidic residue.

0301 basic medicineMalemedicine.drug_classPyridinesPeroxisome proliferator-activated receptorReceptors Cytoplasmic and NuclearATP-binding cassette transporterCholesterol 7 alpha-hydroxylase01 natural sciencesRats Sprague-Dawley03 medical and health sciencesStructure-Activity RelationshipDrug StabilityDrug DiscoverymedicineGlucose homeostasisAnimalsHumansPPAR alphaReceptorCholesterol 7-alpha-HydroxylaseATP Binding Cassette Transporter Subfamily B Member 11chemistry.chemical_classificationBile acid010405 organic chemistryChemistryHEK 293 cellsImidazolesMembrane Transport ProteinsHep G2 Cells0104 chemical sciencesMolecular Docking SimulationZolpidem030104 developmental biologyHEK293 CellsBiochemistryMolecular MedicineFarnesoid X receptorATP-Binding Cassette TransportersSterol Regulatory Element Binding Protein 1HeLa CellsJournal of medicinal chemistry
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