Impact of the first wave of COVID-19 pandemic on the Hungarian university students' social and health behaviour.

Background: The COVID-19 pandemic brought quick, severe and unexpected changes to our everyday life and also changed the traditional education pattern of Semmelweis University in the middle of academic year 2019-2020. We explored adaptive changes in Hungarian students' behaviour and their time-budget in order to determine whether quarantine and/or fear of infection were responsible for these changes.

Methods: A self-administered online questionnaire was distributed to all students in the Hungarian language program ( = 7436) of Semmelweis University.

Angiotensin II increases the permeability and PV-1 expression of endothelial cells.

Angiotensin II (ANG II), the major effector molecule of the renin-angiotensin system (RAS), is a powerful vasoactive mediator associated with hypertension and renal failure. In this study the permeability changes and its morphological attributes in endothelial cells of human umbilical vein (HUVECs) were studied considering the potential regulatory role of ANG II. The effects of ANG II were compared with those of vascular endothelial growth factor (VEGF).