4,989 results match your criteria: "Johann Wolfgang-Goethe University[Affiliation]"

Aim: This investigation aimed to evaluate the 1-year survival of implants placed after staged lateral alveolar ridge augmentation using equine-derived collagenated xenogeneic bone blocks (CXBBs) or autogenous bone block (ABB).

Materials And Methods: Fifty patients who underwent lateral augmentation in a previous trial were included. The primary outcome measure was implant survival at the 1-year follow-up, and secondary outcomes included implant success, peri-implant clinical and volumetric parameters, pink aesthetic scores (PES) and patient-reported outcome measures.

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Background: Peri-implant disease prevalence is associated with a multifactorial etiology and distinct clinical characteristics of inflammation.

Methods: The present study aimed to assess the prevalence of peri-implant diseases, identify related risk indicators, and associate specific clinical characteristics to peri-implant biological complications in the medium term. Peri-implant diseases were classified according to established case criteria.

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Objectives: Report the results with a novel workflow of digital restoration for completely edentulous patients with implant supported full arch fixed dental prostheses (ISFDP).

Methods: This multicenter retrospective clinical study was based on the evaluation from a cohort of 29 patients restored with 37 ISFDP designed and manufactured from the data captured by a direct intraoral scan, using a novel full digital system (NEXUS IOS®, Osteon Medical, a Keystone Dental Group company, Melbourne, Australia). Data was collected over a 3-year period, in six different dental centers.

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Structural Basis for Highly Selective Class II Alpha Phosphoinositide-3-Kinase Inhibition.

J Med Chem

October 2023

Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), Campus Berlin-Buch, 13125 Berlin, Germany.

Article Synopsis
  • - Class II phosphoinositide-3-kinases (PI3Ks) are important for various cellular processes like signaling, division, and survival, but studying their specific functions is challenging without selective inhibitors.
  • - Researchers have developed selective PI3K-C2α inhibitors, named PITCOINs, through a study that focused on the structure-activity relationship of a specific chemical scaffold, identifying key molecular features for their effectiveness.
  • - The PITCOINs demonstrated strong inhibition of PI3K-C2α with no interference in other kinases, showing promise for new treatments targeting diseases associated with this isoform's function.
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Epigenetic targeting to enhance acute myeloid leukemia-directed immunotherapy.

Front Immunol

November 2023

Department of Hematology and Medical Oncology, University Medical Center, Johannes Gutenberg-University, Mainz, Germany.

AML is a malignant disease of hematopoietic progenitor cells with unsatisfactory treatment outcome, especially in patients that are ineligible for intensive chemotherapy. Immunotherapy, comprising checkpoint inhibition, T-cell engaging antibody constructs, and cellular therapies, has dramatically improved the outcome of patients with solid tumors and lymphatic neoplasms. In AML, these approaches have been far less successful.

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Ethanologenesis from glycerol by the gut acetogen Blautia schinkii.

Environ Microbiol

December 2023

Molecular Microbiology & Bioenergetics, Institute of Molecular Biosciences, Johann Wolfgang Goethe University, Frankfurt, Germany.

The human gut is an anoxic environment that harbours a multitude of microorganisms that not only contribute to food digestion. The microbiome is also involved in malfunctions such as diseases, inflammation processes or development of obesity, but it is also involved in processes that increase the human well-being. Both, the good and the bad, are mediated by fermentation end products of bacterial metabolism, among others.

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A machine learning and live-cell imaging tool kit uncovers small molecules induced phospholipidosis.

Cell Chem Biol

December 2023

Institute of Pharmaceutical Chemistry, Johann Wolfgang Goethe University, 60438 Frankfurt am Main, Germany; Structural Genomics Consortium (SGC), Buchmann Institute for Life Sciences, Johann Wolfgang Goethe University, 60438 Frankfurt am Main, Germany. Electronic address:

Drug-induced phospholipidosis (DIPL), characterized by excessive accumulation of phospholipids in lysosomes, can lead to clinical adverse effects. It may also alter phenotypic responses in functional studies using chemical probes. Therefore, robust methods are needed to predict and quantify phospholipidosis (PL) early in drug discovery and in chemical probe characterization.

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Background & Aims: Until recently, pegylated interferon-alfa-2a (PEG-IFNa) therapy was the only treatment option for patients infected with hepatitis D virus (HDV). Treatment with PEG-IFNa with or without tenofovir disoproxil fumarate (TDF) for 96 weeks resulted in HDV RNA suppression in 44% of patients at the end of therapy but did not prevent short-term relapses within 24 weeks. The virological and clinical long-term effects after prolonged PEG-IFNa-based treatment of hepatitis D are unknown.

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TDP-43 pathology is associated with increased tau burdens and seeding.

Mol Neurodegener

September 2023

Laboratory of Neuropathology - Department of Imaging and Pathology, KU Leuven, Leuven, Belgium.

Background: Most Alzheimer's Disease (AD) cases also exhibit limbic predominant age-related TDP-43 encephalopathy neuropathological changes (LATE-NC), besides amyloid-β plaques and neurofibrillary tangles (NFTs) containing hyperphosphorylated tau (p-tau). LATE-NC is characterized by cytoplasmic aggregates positive for pathological TDP-43 and is associated with more severe clinical outcomes in AD, compared to AD cases lacking TDP-43 pathology TDP-43: AD(LATE-NC-). Accumulating evidence suggests that TDP-43 and p-tau interact and exhibit pathological synergy during AD pathogenesis.

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The impact of space radiation and microgravity on DNA damage responses has been discussed controversially, largely due to the variety of model systems engaged. Here, we performed side-by-side analyses of human hematopoietic stem/progenitor cells (HSPC) and peripheral blood lymphocytes (PBL) cultivated in a 2D clinostat to simulate microgravity before, during and after photon and particle irradiation. We demonstrate that simulated microgravity (SMG) accelerates the early phase of non-homologous end joining (NHEJ)-mediated repair of simple, X-ray-induced DNA double-strand breaks (DSBs) in PBL, while repair kinetics in HSPC remained unaltered.

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Targeting EPHA2 with Kinase Inhibitors in Colorectal Cancer.

ChemMedChem

December 2023

Center for Biomolecular Magnetic Resonance, Institute for Organic Chemistry and Chemical Biology, Johann Wolfgang Goethe University, Max-von-Laue-Straße 7, 60438, Frankfurt am Main, Germany.

The ephrin type-A 2 receptor tyrosine kinase (EPHA2) is involved in the development and progression of various cancer types, including colorectal cancer (CRC). There is also evidence that EPHA2 plays a key role in the development of resistance to the endothelial growth factor receptor (EGFR) monoclonal antibody Cetuximab used clinically in CRC. Despite the promising pharmacological potential of EPHA2, only a handful of specific inhibitors are currently available.

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A temperature dependent pilin promoter for production of thermostable enzymes in Thermus thermophilus.

Microb Cell Fact

September 2023

Molecular Microbiology & Bioenergetics, Institute of Molecular Biosciences, Johann Wolfgang Goethe University Frankfurt/Main, Max-von-Laue- Str. 9, 60438, Frankfurt, Germany.

Background: Enzymes from thermophiles are of great interest for research and bioengineering due to their stability and efficiency. Thermophilic expression hosts such as Thermus thermophilus [T. thermophilus] can overcome specific challenges experienced with protein production in mesophilic expression hosts, such as leading to better folding, increased protein stability, solubility, and enzymatic activity.

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Objective: Obstructive sleep apnea is associated with high morbidity. Hypoglossal nerve stimulation (HNS) has become a novel (neuro-) surgical treatment strategy for obstructive sleep apnea, demonstrating good success rates. Beyond predefined inclusion and exclusion criteria, no precise data are available, enabling individual preoperative risk assessment.

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Achieving a good outcome for a person with Psoriatic Arthritis (PsA) is made difficult by late diagnosis, heterogenous clinical disease expression and in many cases, failure to adequately suppress inflammatory disease features. Single-centre studies have certainly contributed to our understanding of disease pathogenesis, but to adequately address the major areas of unmet need, multi-partner, collaborative research programmes are now required. HIPPOCRATES is a 5-year, Innovative Medicines Initiative (IMI) programme which includes 17 European academic centres experienced in PsA research, 5 pharmaceutical industry partners, 3 small-/medium-sized industry partners and 2 patient-representative organizations.

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Single-molecule localization microscopy achieves nanometer spatial resolution by localizing single fluorophores separated in space and time. A major challenge of single-molecule localization microscopy is the long acquisition time, leading to low throughput, as well as to a poor temporal resolution that limits its use to visualize the dynamics of cellular structures in live cells. Another challenge is photobleaching, which reduces information density over time and limits throughput and the available observation time in live-cell applications.

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The challenge of endergonic reduction of NADP using NADH is overcome by ferredoxin-dependent transhydrogenases that employ electron bifurcation for electron carrier adjustments in the ancient Wood-Ljungdahl pathway. Recently, an electron-bifurcating transhydrogenase with subunit compositions distinct from the well-characterized Nfn-type transhydrogenase was described: the Stn complex. Here, we present the single-particle cryo-EM structure of the Stn family transhydrogenase from the acetogenic bacterium Sporomusa ovata and functionally dissect its electron transfer pathway.

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Introduction: The demand for complementary medicine (CM) is well studied in the outpatient sector, but representative data on type and extent of inpatient care using CM are missing. Therefore, our aim was to examine the range of CM treatments offered and the types of indications for using CM in acute care hospitals in the German state of Bavaria.

Methods: We conducted a cross-sectional questionnaire survey by contacting the medical heads of all 388 Bavarian acute care hospitals between November 2020 and April 2021.

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Introduction: Direct printing of clear aligners could be the next paradigm shift in modern orthodontics and can potentially overcome the limitation of the indirect production method. This study investigated the effects of 1 week of intraoral usage on the surface roughness parameters of directly printed aligners (DPAs) and commercially produced Invisalign aligners compared with their unused control counterparts using confocal laser scanning microscopy.

Methods: The study consisted of 4 groups with 34 samples per group.

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Protein arylation has attracted much attention for developing new classes of bioconjugates with improved properties. Here, we have evaluated 2-sulfonylpyrimidines as covalent warheads for the mild, chemoselective, and metal free cysteine -arylation. 2-Sulfonylpyrimidines react rapidly with cysteine, resulting in stable -heteroarylated adducts at neutral pH.

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The Spectrum of Molecular Pathways in Gliomas-An Up-to-Date Review.

Biomedicines

August 2023

Department of Neuroradiology, Clinics of Johann Wolfgang Goethe-University, Schleusenweg 2-16, D-60528 Frankfurt am Main, Germany.

During the last 20 years, molecular alterations have gained increasing significance in the diagnosis and biological assessment of tumors. Gliomas represent the largest group of tumors of the central nervous system, and the main aim of this review is to present the current knowledge on molecular pathways and their alterations in gliomas. A wide range of new insights has been gained, including evidence for the involvement of the WNT pathway or the hippo pathway in the pathobiology of gliomas, indicating a broad involvement of different pathways formerly not considered to play a central role in gliomas.

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Descent, marriage, and residence practices of a 3,800-year-old pastoral community in Central Eurasia.

Proc Natl Acad Sci U S A

September 2023

Institute of Organismic and Molecular Evolution, Palaeogenetics Group, Johannes Gutenberg University, Mainz 55128, Germany.

Our understanding of prehistoric societal organization at the family level is still limited. Here, we generated genome data from 32 individuals from an approximately 3,800-y-old burial mound attributed to the Bronze Age Srubnaya-Alakul cultural tradition at the site of Nepluyevsky, located in the Southern Ural region of Central Eurasia. We found that life expectancy was generally very low, with adult males living on average 8 y longer than females.

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Identifying key policy objectives for strong primary care: a cross-sectional study.

Prim Health Care Res Dev

August 2023

Institute of General Practice and Evidence-based Health Services Research, Medical University of Graz, Neue Stiftingtalstraße 6, Graz8010, Austria.

Aim: The aim of this study was to identify key policy objectives by investigating the perception of important stakeholders and affected professionals concerning relevance and feasibility of a successful primary care (PC) reform.

Background: Since 2013, the Austrian PC system has been undergoing a reform process to establish multiprofessional primary care units. The reforms have various defined objectives and lack clear priorities.

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Quality Control of Chemogenomic Library Using LC-MS.

Methods Mol Biol

August 2023

Institute for Pharmaceutical Chemistry, Structural Genomics Consortium, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany.

In chemical biology, using compounds with incorrect identity or insufficient purity can lead to misleading biological activity data. Chemical quality control for confirmation of purity and compound identity is thus central to chemogenomics. We have established a medium-throughput LC-MS-based semi-automated quality control (QC) workflow with a minimal requirement for materials suitable for chemogenomics and other small molecule libraries.

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Voriconazole plasma concentrations and dosing in paediatric patients below 24 months of age.

Mycoses

November 2023

Infectious Disease Research Program, Center for Bone Marrow Transplantation and Department of Pediatric Hematology/Oncology, Children's University Hospital Münster, Münster, Germany.

Voriconazole (VCZ) is an important first-line option for management of invasive fungal diseases and approved in paediatric patients ≥24 months at distinct dosing schedules that consider different developmental stages. Information on dosing and exposures in children <24 months of age is scarce. Here we report our experience in children <24 months who received VCZ due to the lack of alternative treatment options.

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