Project description:Purpose To review the sustained effect of COVID-19 on rhegmatogenous retinal detachment (RRD) baseline characteristics and outcomes. Methods This was a retrospective consecutive case series at the Birmingham and Midlands Eye Centre including patients undergoing primary RRD repair between 23 March and 31 December 2017–2019 (Group 1) and 2020 (Group 2). The deciles of indices of multiple deprivation (IMD) were determined by postcode to group patients into least deprived (IMD1-5) and most deprived (IMD6-10). Results In total we reviewed 1310 patients, 1003 in Group 1 and 307 in Group 2. Relative to 2017–2019, during the first lockdown, we observed (a) a reduction in the number of patients with RRD, (b) an increase in macula-off detachments, (c) an increase in RRD primary failure, and (d) that the least deprived had proportionately higher primary failure than the most deprived (p = 0.049) with a higher detachment rate than the pre-COVID-19 period (p = 0.010) and increased presentations of macula-off detachment. During the second lockdown, these differences were not observed. Conclusion The previously observed findings of lower presentation rates of RRD during the beginning of the first lockdown and the decreased number of macula-on RRD were not sustained over a longer period of observation or found to recur after a second national lockdown. Patients from areas with the least socioeconomic deprivation seemed to be more negatively affected by the first lockdown, with later presentation and higher rates of re-detachments compared with the most deprived during the first lockdown. Our findings offer reassurance that patient behaviour and health services had adapted to the pandemic by the second national lockdown. Supplementary Information The online version of this article (10.1007/s00717-022-00521-0) contains supplementary material, which is available to authorized users.
Project description:Hintergrund Seit Beginn der COVID-19-Pandemie mehren sich Befunde zu ihrem negativen Einfluss auf die psychische Gesundheit von Kindern und Jugendlichen. Bisher ist jedoch wenig darüber bekannt, ob und wie sich dies auf die psychotherapeutische Versorgung von Kindern und Jugendlichen niederschlägt. Ziel der Arbeit Die psychische Situation von Kindern und Jugendlichen sowie ihre psychotherapeutische Versorgung seit Beginn der COVID-19-Pandemie sollen aus Sicht von Kinder- und JugendlichenpsychotherapeutInnen (KJP) erfasst werden. Material und Methoden Es wurden 324 KJP aus Deutschland in einer Online-Umfrage gebeten, die letzten 6 Monate mit einem 6‑monatigen Zeitraum vor 2 Jahren zu vergleichen. Fünf- und 7‑stufige Likert-Skalen, Fragen mit Mehr- und Einfachauswahl sowie numerische und ein freies Antwortformat wurden verwendet. Ergebnisse Seit Pandemiebeginn haben sich die Wartezeiten nahezu verdoppelt. Es werden mehr Behandlungsstunden angeboten, v. a. mehr Erstgespräche durchgeführt. Therapieverlängerungen kommen häufiger, -abbrüche seltener vor. Bei der Hälfte der PatientInnen ist eine pandemieassoziierte Symptomverschlechterung aufgetreten. Alle erfragten psychischen Störungen treten z. T. deutlich häufiger auf (v. a. Depressionen, Angststörungen, Medienabhängigkeit, Schlaf‑, Anpassungs‑, Zwangs- und Essstörungen). Es erfolgen mehr Telefon- und Videositzungen als vor der Pandemie. Die Zusammenarbeit mit Eltern hat sich verstärkt, die mit dem interdisziplinären Netzwerk verringert. Diskussion Die Pandemie hat einen deutlichen Einfluss auf die psychische Verfassung und die psychotherapeutische Versorgung von Kindern und Jugendlichen in Deutschland. Eine Anpassung des Versorgungssystems an den gestiegenen Bedarf wird vorgeschlagen, um mögliche Folgeschäden der Pandemie zu begrenzen. Zusatzmaterial online Die Online-Version dieses Beitrags (10.1007/s00278-022-00604-y) enthält die detaillierten Fragen des Fragebogens.
Project description:Introduction and objectiveCholesterol homeostasis is a culmination of cellular synthesis, efflux, and catabolism to important physiological entities where short chain fatty acid, butyrate embodied as a key player. This discourse probes the mechanistic molecular details of butyrate action in maintaining host-cholesterol balance.MethodsHepatic mir-122 being the most indispensable regulator of cholesterol metabolic enzymes, we studied upstream players of mir-122 biogenesis in the presence and absence of butyrate in Huh7 cells and mice model. We synthesized unique self-transfecting GMO (guanidinium-morpholino-oligo) linked PMO (Phosphorodiamidate-Morpholino Oligo)-based antisense cell-penetrating reagent to selectively knock down the key player in butyrate mediated cholesterol regulation.ResultsWe showed that butyrate treatment caused upregulation of RNA-binding protein, AUF1 resulting in RNase-III nuclease, Dicer1 instability, and significant diminution of mir-122. We proved the importance of AUF1 and sequential downstream players in AUF1-knock-down mice. Injection of GMO-PMO of AUF1 in mouse caused near absence of AUF1 coupled with increased Dicer1 and mir-122, and reduced serum cholesterol regardless of butyrate treatment indicating that butyrate acts through AUF1.ConclusionThe roster of intracellular players was as follows: AUF1-Dicer1-mir-122 for triggering butyrate driven hypocholesterolemia. To our knowledge this is the first report linking AUF-1 with cholesterol biogenesis.
Project description:Rotavirus, a nonturreted member of the Reoviridae, is the causative agent of severe infantile diarrhea. The double-stranded RNA genome encodes six structural proteins that make up the triple-layer particle. X-ray crystallography has elucidated the structure of one of these capsid proteins, VP6, and two domains from VP4, the spike protein. Complementing this work, electron cryomicroscopy (cryoEM) has provided relatively low-resolution structures for the triple-layer capsid in several biochemical states. However, a complete, high-resolution structural model of rotavirus remains unresolved. Combining new structural analysis techniques with the subnanometer-resolution cryoEM structure of rotavirus, we now provide a more detailed structural model for the major capsid proteins and their interactions within the triple-layer particle. Through a series of intersubunit interactions, the spike protein (VP4) adopts a dimeric appearance above the capsid surface, while forming a trimeric base anchored inside one of the three types of aqueous channels between VP7 and VP6 capsid layers. While the trimeric base suggests the presence of three VP4 molecules in one spike, only hints of the third molecule are observed above the capsid surface. Beyond their interactions with VP4, the interactions between VP6 and VP7 subunits could also be readily identified. In the innermost T=1 layer composed of VP2, visualization of the secondary structure elements allowed us to identify the polypeptide fold for VP2 and examine the complex network of interactions between this layer and the T=13 VP6 layer. This integrated structural approach has resulted in a relatively high-resolution structural model for the complete, infectious structure of rotavirus, as well as revealing the subtle nuances required for maintaining interactions in such a large macromolecular assembly.
Project description:The ability to quantify and visualize submicrometer-scale oscillatory motions of objects in three dimensions has a wide range of application in acoustics, materials sciences, and medical imaging. Here we demonstrate that volumetric snapshots of rapid periodic motion can be captured using optical coherence tomography (OCT) with subnanometer-scale motion sensitivity and microsecond-scale temporal resolution. This technique, termed OCT vibrography, was applied to generate time-resolved volumetric vibrographs of a miniature drum driven acoustically at several kilohertz.
Project description:Indium selenides (InxSey) have been shown to retain several desirable properties, such as ferroelectricity, tunable photoluminescence through temperature-controlled phase changes, and high electron mobility when confined to two dimensions (2D). In this work we synthesize single-layer, ultrathin, subnanometer-wide InxSey by templated growth inside single-walled carbon nanotubes (SWCNTs). Despite the complex polymorphism of InxSey we show that the phase of the encapsulated material can be identified through comparison of experimental aberration-corrected transmission electron microscopy (AC-TEM) images and AC-TEM simulations of known structures of InxSey. We show that, by altering synthesis conditions, one of two different stoichiometries of sub-nm InxSey, namely InSe or β-In2Se3, can be prepared. Additionally, in situ AC-TEM heating experiments reveal that encapsulated β-In2Se3 undergoes a phase change to γ-In2Se3 above 400 °C. Further analysis of the encapsulated species is performed using X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), energy dispersive X-ray analysis (EDX), and Raman spectroscopy, corroborating the identities of the encapsulated species. These materials could provide a platform for ultrathin, subnanometer-wide phase-change nanoribbons with applications as nanoelectronic components.
Project description:The clinical manifestations of COVID-19 are mainly respiratory symptoms, but some patients present with cardiovascular system disease such as palpitations and shortness of breath as the first or secondary symptoms. In this paper, we describe the characteristics of SARS-CoV?2 and its functional receptor angiotensin-converting enzyme 2 (ACE2). Furthermore, we explore the impact of virus-induced myocardial damage, decreased ACE2 activity, immune imbalance, hypoxemia, and heart damage caused by antiviral drugs.