Prävention des Eintrags von SARS-CoV-2 in Kitas: Erfahrungen aus dem Berliner Bezirk Treptow-Köpenick, Januar bis März 2021

Das Robert Koch-Institut, das Landesamt für Gesundheit und Soziales Berlin und das Gesundheitsamt des Bezirks Treptow-Köpenick untersuchten im Rahmen eines Amtshilfeersuchens Faktoren, die möglicherweise zum Eintrag und zur Übertragung von SARS-CoV-2 in Kitas des Berliner Bezirks im Zeitraum Januar bis März 2021 beigetragen haben. Im Beitrag werden Präventionsmaßnahmen und potenzielle Risikofaktoren für SARS-CoV-2-Infektionen in Kitas analysiert sowie Einzelfälle und Ausbrüche auf Grundlage der Daten des Gesundheitsamtes epidemiologisch ausgewertet. Aus den Erkenntnissen lassen sich anschließend drei Handlungsempfehlungen ableiten.Peer Reviewe

Dietary restriction protects from age-associated DNA methylation and induces epigenetic reprogramming of lipid metabolism

Abstract Background Dietary restriction (DR), a reduction in food intake without malnutrition, increases most aspects of health during aging and extends lifespan in diverse species, including rodents. However, the mechanisms by which DR interacts with the aging process to improve health in old age are poorly understood. DNA methylation could play an important role in mediating the effects of DR because it is sensitive to the effects of nutrition and can affect gene expression memory over time. Results Here, we profile genome-wide changes in DNA methylation, gene expression and lipidomics in response to DR and aging in female mouse liver. DR is generally strongly protective against age-related changes in DNA methylation. During aging with DR, DNA methylation becomes targeted to gene bodies and is associated with reduced gene expression, particularly of genes involved in lipid metabolism. The lipid profile of the livers of DR mice is correspondingly shifted towards lowered triglyceride content and shorter chain length of triglyceride-associated fatty acids, and these effects become more pronounced with age. Conclusions Our results indicate that DR remodels genome-wide patterns of DNA methylation so that age-related changes are profoundly delayed, while changes at loci involved in lipid metabolism affect gene expression and the resulting lipid profile