Cardiac tissue engineering is a promising approach to treat cardiovascular diseases, which are a major socio-economic burden worldwide. An optimal material for cardiac tissue engineering, allowing ...cardiomyocyte attachment and exhibiting proper immunocompatibility, biocompatibility and mechanical characteristics, has not yet emerged. An additional challenge is to develop a fabrication method that enables the generation of proper hierarchical structures and constructs with a high density of cardiomyocytes for optimal contractility. Thus, there is a focus on identifying suitable materials for cardiac tissue engineering. Here, we investigated the interaction of neonatal rat heart cells with engineered spider silk protein (eADF4(C16)) tagged with the tripeptide arginyl-glycyl-aspartic acid cell adhesion motif RGD, which can be used as coating, but can also be 3D printed. Cardiomyocytes, fibroblasts, and endothelial cells attached well to eADF4(C16)-RGD coatings, which did not induce hypertrophy in cardiomyocytes, but allowed response to hypertrophic as well as proliferative stimuli. Furthermore, Kymograph and MUSCLEMOTION analyses showed proper cardiomyocyte beating characteristics on spider silk coatings, and cardiomyocytes formed compact cell aggregates, exhibiting markedly higher speed of contraction than cardiomyocyte mono-layers on fibronectin. The results suggest that eADF4(C16)-RGD is a promising material for cardiac tissue engineering.
Fabry disease is an X-linked lysosomal storage disorder caused by deficient activity of α -galactosidase A which leads to progressive intracellular accumulation of globotriaosylceramide in tissues ...and organs including heart, kidney, vascular endothelium, the nervous system, the eyes and the skin. Cardiac involvement is common, leads to fatal complications and is mainly responsible for reduced life expectancy in Fabry disease. The exact staging of disease progression and timely initiation of treatment is essential in Fabry disease. Therefore, it is essential to use the possibilities of specific biomarkers for early detection of organ involvement or early diagnosis.
By the use of Pubmed all relevant papers for biomarkers in Fabry disease were screened. The quality of retrieved papers was appraised using standard tools. Finally, 70 peer reviewed paper were included.
In the past biomarkers for Fabry disease biomarkers did not have clinical relevance. Nowadays, a lot of research is focusing on identification of new biomarkers and their clinical relevance. Only two biomarkers reached clinical applicability. Lyso-GB3 for identification of atypical FD variants and hsTNT for identification of cardiac involvement, which should indicate further diagnostics. Treatment response to ERT can be monitored by lyso-GB3 but data for long-time outcome are missing. A lot of GB3-related analogs are identified in urine and plasma, some of which might play an important role for managing Fabry disease in future.
In conclusion, we suggest to measure lyso-GB3 and hsTNT at least once a year. The routine measurement of these two biomarkers will help now for the staging of every individual patient and in addition, will help for a better general understanding of Fabry disease.
Controlling the emission and the flow of light in micro- and nanostructures is crucial for on-chip information processing. Here we show how to impose a strong chirality and a switchable direction of ...light propagation in an optical system by steering it to an exceptional point (EP)—a degeneracy universally occurring in all open physical systems when two eigenvalues and the corresponding eigenstates coalesce. In our experiments with a fiber-coupled whispering-gallery-mode (WGM) resonator, we dynamically control the chirality of resonator modes and the emission direction of a WGM microlaser in the vicinity of an EP: Away from the EPs, the resonator modes are nonchiral and laser emission is bidirectional. As the system approaches an EP, the modes become chiral and allow unidirectional emission such that by transiting from one EP to another one the direction of emission can be completely reversed. Our results exemplify a very counterintuitive feature of non-Hermitian physics that paves the way to chiral photonics on a chip.
Die Zeitschrift Archiv für Papyrusforschung und verwandte Gebiete ist das älteste papyrologische Fachorgan der Welt. Sieunterscheidet sich von anderen papyrologischen Zeitschriften hauptsächlich ...durch ihre Referate (literarische Papyri, christliche Texte, Urkundenreferat, juristisches Referat, koptische Texte und Urkunden, Demotica Selecta sowie Darstellungen und Hilfsmittel). Die Beihefte zu der Zeitschrift vereinen sowohl Monographien als auch Sammelbände; im Zentrum stehen Neueditionen von Papyrustexten griechischer, lateinischer, koptischer, demotischer oder arabischer Sprache, die neue Erkenntnisse zu verschiedenen Bereichen des Altertums vermitteln: zu Philologie, Literatur, Philosophie, Religion, Politik und Sozialgeschichte, zu Militär- und Rechtsgeschichte, zu Geographie und Landeskunde, zu Schul- und Gesundheitswesen und zum Alltagsleben; kurzum, zur antiken Kulturgeschichte überhaupt. Autoreninformation Lajos Berkes, Humboldt-Universität zu Berlin; Jean-Luc Fournet, Collège de France, Frankreich; Demokritos Kaltsas, University of Cyprus, Zypern; Brian McGing, Trinity College, Irland; Fabian Reiter, Università di Bologna, Italien; Giuseppe Ucciardello, Università di Messina, Italien; Marja Vierros, University of Helsinki, Finnland
Condensed‐phase mechanisms play a major role in fire‐retardant polymers. Generations of development have followed the concept of charring to improve fire properties. Whereas the principal reactions ...are believed to be known, the specific description for multicomponent systems is lacking, as is the picture across different systems. A two‐step approach is proposed in general, and also presented in greater detail. The second step covers the specific reactions controlling charring, whereas the actual reactants are provided in the preceding step. This model consistently incorporates the variety of structure–property relationships reported. A comprehensive case study is presented on seven phosphorus flame retardants in two epoxy resins to breathe life into the two‐step approach.
Specific reactions control charring in burning polymers. In a preceding step, the reactants are provided in competition to releasing volatiles. Such a simple two‐step model enables a detailed description as well as a general overview of the flame‐retardancy mechanisms in the condensed phase. A comprehensive case study of seven phosphorous flame retardants in two epoxy resins underlines the model.
Anderson-Fabry disease is an X-linked lysosomal storage disorder caused by alpha-galactosidase A deficiency. The intracellular storage of globotriaosylceramides in different tissues and organs leads ...to a multisystemic disease affecting kidneys, nervous system and the heart. Fabry cardiomyopathy is frequent and leads to concentric left-ventricular hypertrophy. Typical pattern in advanced stages is myocardial replacement fibrosis, first localized to mid myocardial layers of postero-lateral basal myocardium and then spreading to transmural fibrosis.Long term prognosis is dependent on timely initiation of specific and concomitant therapies, while therapy in advanced stages is only able to stabilize the organ affection. This review describes the characteristics of Fabry cardiomyopathy, shows the clinical assessment of cardiac involvement and highlights therapeutic issues aiming at the best outcome for patients with Fabry disease.
The endosymbiosis between the pathogenic fungus Rhizopus microsporus and the toxin-producing bacterium Mycetohabitans rhizoxinica represents a unique example of host control by an endosymbiont. ...Fungal sporulation strictly depends on the presence of endosymbionts as well as bacterially produced secondary metabolites. However, an influence of primary metabolites on host control remained unexplored. Recently, we discovered that M. rhizoxinica produces FO and 3PG-F420, a derivative of the specialized redox cofactor F420. Whether FO/3PG-F420 plays a role in the symbiosis has yet to be investigated. Here, we report that FO, the precursor of 3PG-F420, is essential to the establishment of a stable symbiosis. Bioinformatic analysis revealed that the genetic inventory to produce cofactor 3PG-F420 is conserved in the genomes of eight endofungal Mycetohabitans strains. By developing a CRISPR/Cas-assisted base editing strategy for M. rhizoxinica, we generated mutant strains deficient in 3PG-F420 (M. rhizoxinica ΔcofC) and in both FO and 3PG-F420 (M. rhizoxinica ΔfbiC). Co-culture experiments demonstrated that the sporulating phenotype of apo-symbiotic R. microsporus is maintained upon reinfection with wild-type M. rhizoxinica or M. rhizoxinica ΔcofC. In contrast, R. microsporus is unable to sporulate when co-cultivated with M. rhizoxinica ΔfbiC, even though the fungus was observed by super-resolution fluorescence microscopy to be successfully colonized. Genetic and chemical complementation of the FO deficiency of M. rhizoxinica ΔfbiC led to restoration of fungal sporulation, signifying that FO is indispensable for establishing a functional symbiosis. Even though FO is known for its light-harvesting properties, our data illustrate an important role of FO in inter-kingdom communication.
RNF213, encoding a giant E3 ubiquitin ligase, has been recognized for its role as a key susceptibility gene for moyamoya disease. Case reports have also implicated specific variants in RNF213 with an ...early-onset form of moyamoya disease with full penetrance. We aimed to expand the phenotypic spectrum of monogenic RNF213-related disease and to evaluate genotype-phenotype correlations.
Patients were identified through reanalysis of exome sequencing data of an unselected cohort of unsolved pediatric cases and through GeneMatcher or ClinVar. Functional characterization was done by proteomics analysis and oxidative phosphorylation enzyme activities using patient-derived fibroblasts.
We identified 14 individuals from 13 unrelated families with (de novo) missense variants in RNF213 clustering within or around the Really Interesting New Gene (RING) domain. Individuals presented either with early-onset stroke (n = 11) or with Leigh syndrome (n = 3). No genotype-phenotype correlation could be established. Proteomics using patient-derived fibroblasts revealed no significant differences between clinical subgroups. 3D modeling revealed a clustering of missense variants in the tertiary structure of RNF213 potentially affecting zinc-binding suggesting a gain-of-function or dominant negative effect.
De novo missense variants in RNF213 clustering in the E3 RING or other regions affecting zinc-binding lead to an early-onset syndrome characterized by stroke or Leigh syndrome.
This volume examines the loanwords found in 18 late-Byzantine histories and chronicles. In order to analyze the lexical interferences in the lexicon of late-Byzantine historical literature, all words ...were included (except place names and proper names) that substantiate language contact. The editors place special emphasis on the sociolinguistic context in which the loanwords were used.
Fabry disease (FD) is an X-linked multisystemic disorder with a heterogeneous phenotype. Especially atypical or late-onset type 2 phenotypes present a therapeutical dilemma.
To determine the clinical ...impact of the alpha-Galactosidase A (GLA) p.A143T/ c.427G > A variation, we retrospectively analyzed 25 p.A143T patients in comparison to 58 FD patients with other missense mutations.
p.A143T patients suffering from stroke/ transient ischemic attacks had slightly decreased residual GLA activities, and/or increased lyso-Gb3 levels, suspecting FD. However, most male p.A143T patients presented with significant residual GLA activity (~50 % of reference), which was associated with normal lyso-Gb3 levels. Additionally, p.A143T patients showed less severe FD-typical symptoms and absent FD-typical renal and cardiac involvement in comparison to FD patients with other missense mutations. Two tested female p.A143T patients with stroke/TIA did not show skewed X chromosome inactivation. No accumulation of neurologic events in family members of p.A143T patients with stroke/transient ischemic attacks was observed.
We conclude that GLA p.A143T seems to be most likely a neutral variant or a possible modifier instead of a disease-causing mutation. Therefore, we suggest that p.A143T patients with stroke/transient ischemic attacks of unknown etiology should be further evaluated, since the diagnosis of FD is not probable and subsequent ERT or chaperone treatment should not be an unreflected option.
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