How does the local wind field control the aerosol distribution in coastal Dronning Maud Land?

Atmospheric circulation patterns and chemical concentrations in firn cores are highly related to each other. Atmospheric winds transport aerosols like sea salt and mineral dust over the globe and redistribute them. Because of this, it is possible to reconstruct atmospheric circulation bringing aerosol to Antarctica by analyzing chemical impurities in firn and ice. With these analyses, the gap caused by sparse atmospheric measurements can be filled and this knowledge can then be used to improve the understanding of local and global circulation patterns.Due to a very high accumulation rate (~600 kg/m²*a), coastal Dronning Maud Land (CDML) is a perfect site to conduct these studies.Here, the upper 6m of two firn cores drilled on Halvfaryggen and Sörasen (covering the time interval from 2002- 2007) were analyzed on ionic concentrations. This data was then contrasted to measurements from the air chemistry laboratories at Neumayer (NM) and Kohnenstation (KS), and synoptic measurements from automatic weather stations (distributed in CDML and at NM).The analyses show very different results: Sea salt ions (e.g. Na+) are higher correlated to ions measured in aerosol samples at the air chemistry laboratory at KS than to the one located at NM. In contrast, ions representing mineral dust (e.g. nss-Ca2+) only have a weak correlation over the whole area and time period. Accordingly, the deposition of aerosol is highly dependent on its origin and the topography in coastal Antarctica suggesting different transport pathways for sea level and higher altitude sites

Pre- and postsynaptic nanostructures increase in size and complexity after LTP induction

http://dx.doi.org/10.13039/501100001659 Deutsche Forschungsgemeinschaf

Multidisziplinarität als Schlüssel zum Erfolg : Zusammenarbeit zwischen Dermatologie und Rheumatologie zur Optimierung der Patientenversorgung

Hintergrund Patienten mit systemischen Autoimmun- und/oder autoinflammatorischen Erkrankungen (AI/AInf) bedürfen in der Regel einer multidisziplinären Zusammenarbeit durch verschiedene Fachrichtungen. Ziel der Arbeit (Fragestellung) Wir evaluierten, ob die Etablierung eines multidisziplinären Boards (sog. Rheumaboard [RB]) zur Optimierung der Versorgung von Patienten mit Psoriasisarthritis (PsA) oder anderen AI/AInf führt. Material und Methoden Es wurden n = 272 Patienten mit AI/AInf eingeschlossen, die in 3 Gruppen eingeteilt wurden; Gruppe 1: 41 Patienten mit oder mit Verdacht auf (V. a.) PsA, von der Dermatologie in der Rheumatologie konsiliarisch avisiert; Gruppe 2: 166 Patienten mit oder mit V. a. PsA, vorstellig in der Dermatologie und im RB; Gruppe 3: 65 Patienten mit anderen AI/AInf, vorstellig in der Dermatologie und im RB. Evaluiert wurde die durchschnittliche Zeit von der initialen Vorstellung bis zur Therapieeinleitung nach erfolgter Beurteilung und Diagnostik durch beide Fachrichtungen. Darüber hinaus wurden die Diagnosesicherung/-bestätigung und die Therapieweiterführung/-optimierung bei allen 3 Gruppen analysiert. Ergebnisse Die durchschnittliche Zeitspanne von der initialen Vorstellung bis zur Therapieeinleitung betrug in Gruppe 1 85 ± 42,24 (5 bis 173) Tage, in Gruppe 2 15 ± 13,09 (0 bis 78) Tage und in Gruppe 3 20 ± 16,71 (1 bis 75) Tage. In Gruppe 2 und 3 konnte die Diagnose schneller gesichert oder bestätigt sowie die Wartezeit auf Diagnostik und Therapie deutlich reduziert werden. Diskussion Durch die Etablierung eines RB zeigt sich eine signifikante Verkürzung der Zeitspanne zwischen Erstvorstellung und Therapieeinleitung und damit eine deutliche Verbesserung des Versorgungsmanagements bei Patienten mit AI/AInf inklusive Diagnosesicherung und Therapieoptimierung.Background Treatment of patients with systemic autoimmune and/or autoinflammatory diseases (AI/AInf) often requires multidisciplinary collaboration of various medical specialties. Objectives We evaluated whether the establishment of a multidisciplinary board, which we termed rheuma board (RB), can contribute to optimization of care for patients with psoriatic arthritis (PsA) or other AI/AInf. Materials and methods A total of 272 patients were included in the study. Patients were divided into three groups—group 1: 41 patients with or with suspected PsA, initially assessed in the dermatology department and afterwards presented for consultation in the rheumatology department; group 2: 166 patients with or with suspected PsA presenting in the dermatology department and afterwards discussed by RB; group 3: 65 patients with other AI/AInf presenting in the dermatology department and afterwards discussed by RB. We evaluated the average duration from initial presentation to therapy initiation after completing evaluation and diagnostics by both specialties. In addition, diagnosis confirmation/verification and therapy continuation/optimization were analyzed for all three groups. Results The average duration from initial presentation until therapy initiation was 85 ± 42.24 (5–173) days in group 1, 15 ± 13.09 (0–78) days in group 2, and 20 ± 16.71 (1–75) days in group 3. In addition, in groups 2 and 3 confirmation of diagnosis was faster and waiting time for diagnosis and therapy initiation was significantly reduced. Conclusions Establishment of a RB results in a significant reduction in the time duration between first presentation and initiation of therapy, and an improvement of care for patients with AI/AInf including confirmation of diagnosis and therapy optimization

Identification of dihydromyricetin as a natural DNA methylation inhibitor with rejuvenating activity in human skin

Changes in DNA methylation patterning have been reported to be a key hallmark of aged human skin. The altered DNA methylation patterns are correlated with deregulated gene expression and impaired tissue functionality, leading to the well-known skin aging phenotype. Searching for small molecules, which correct the aged methylation pattern therefore represents a novel and attractive strategy for the identification of anti-aging compounds. DNMT1 maintains epigenetic information by copying methylation patterns from the parental (methylated) strand to the newly synthesized strand after DNA replication. We hypothesized that a modest inhibition of this process promotes the restoration of the ground-state epigenetic pattern, thereby inducing rejuvenating effects. In this study, we screened a library of 1800 natural substances and 640 FDA-approved drugs and identified the well-known antioxidant and anti-inflammatory molecule dihydromyricetin (DHM) as an inhibitor of the DNA methyltransferase DNMT1. DHM is the active ingredient of several plants with medicinal use and showed robust inhibition of DNMT1 in biochemical assays. We also analyzed the effect of DHM in cultivated keratinocytes by array-based methylation profiling and observed a moderate, but significant global hypomethylation effect upon treatment. To further characterize DHM-induced methylation changes, we used published DNA methylation clocks and newly established age predictors to demonstrate that the DHM-induced methylation change is associated with a reduction in the biological age of the cells. Further studies also revealed re-activation of age-dependently hypermethylated and silenced genes in vivo and a reduction in age-dependent epidermal thinning in a 3-dimensional skin model. Our findings thus establish DHM as an epigenetic inhibitor with rejuvenating effects for aged human skin

The role of the cerebellum in multiple sclerosis—150 years after Charcot

Despite its functional importance and well known clinical impact in Multiple Sclerosis (MS), the cerebellum has only received significant attention over the past few years. It is now established that the cerebellum plays a key role not only in various sensory-motor networks, but also in cognitive-behavioural processes, domains primarily affected in patients with MS. Evidence from histopathological and magnetic resonance imaging (MRI) studies on cerebellar involvement in MS is increasingly available, however linking these pathological findings with clinical dysfunction remains challenging. There are promising advances in technology that are likely to improve the detection of pathological changes within the cerebellum, which may elucidate how pathology relates to disability

The comorbidity and co-medication profile of patients with progressive supranuclear palsy

BackgroundProgressive supranuclear palsy (PSP) is usually diagnosed in elderly. Currently, little is known about comorbidities and the co-medication in these patients.ObjectivesTo explore the pattern of comorbidities and co-medication in PSP patients according to the known different phenotypes and in comparison with patients without neurodegenerative disease.MethodsCross-sectional data of PSP and patients without neurodegenerative diseases (non-ND) were collected from three German multicenter observational studies (DescribePSP, ProPSP and DANCER). The prevalence of comorbidities according to WHO ICD-10 classification and the prevalence of drugs administered according to WHO ATC system were analyzed. Potential drug-drug interactions were evaluated using AiDKlinik (R).ResultsIn total, 335 PSP and 275 non-ND patients were included in this analysis. The prevalence of diseases of the circulatory and the nervous system was higher in PSP at first level of ICD-10. Dorsopathies, diabetes mellitus, other nutritional deficiencies and polyneuropathies were more frequent in PSP at second level of ICD-10. In particular, the summed prevalence of cardiovascular and cerebrovascular diseases was higher in PSP patients. More drugs were administered in the PSP group leading to a greater percentage of patients with polypharmacy. Accordingly, the prevalence of potential drug-drug interactions was higher in PSP patients, especially severe and moderate interactions.ConclusionsPSP patients possess a characteristic profile of comorbidities, particularly diabetes and cardiovascular diseases. The eminent burden of comorbidities and resulting polypharmacy should be carefully considered when treating PSP patients