Mental Health during the Second Wave of the COVID-19 Pandemic-Polish Studies.

The presented research aimed to identify the impacts of the second wave of the coronavirus disease 2019 (COVID-19) pandemic on respondents' mental health state and identify variables related to the respondents' symptoms of anxiety and depression; 618 subjects participated in the research. A specially prepared survey and Polish adaptations of the following methods were used: Hospital Anxiety and Depression Scale (HADS), Perceived Stress Scale (PSS 10), MINI-COPE Questionnaire (Brief COPE Inventory), Alcohol Use Disorder Identification Test (AUDIT), Scale of Death Anxiety (SDA), The Fear of COVID-19 Scale (FCV-19S). Over 24% of the respondents reported having experienced suicidal thoughts since the start of the pandemic. Almost 16% drank alcohol in a risky or harmful way. The average value of perceived stress indicated its high and very high intensity. Over 20% had symptoms of anxiety disorders, and almost 19% had anxiety and depression symptoms. It means that almost 40% of the respondents probably have mental disorders. More women, younger people, and those with disorders prior to the onset of the pandemic were among those who manifested these disorders. They also used passive and avoidance stress coping strategies more frequently. In conclusion, the second wave of the pandemic negatively affected the mental health of the respondents. A high percentage of the respondents manifested anxiety and anxiety-depressive disorders and declared having of suicidal thoughts.

New insights into induction of early-stage neovascularization in an improved tissue-engineered model of psoriasis.

We have previously shown that putrescine induces a psoriatic phenotype in tissue-engineered skin. The initial aim of this study was to further develop this in vitro model by introducing endothelial cells to mimic the increased vascularization found in psoriasis. Human keratinocytes and fibroblasts, which did not express CD34 or CD31 in 2D culture, were added to de-epidermised acellular human dermis and cultured for 4 weeks. For induction of a psoriatic phenotype, putrescine was added during this period. We report that after 4 weeks of culture, and particularly when exposed to putrescine, this model showed expression of vertically organised clusters of CD31 positive cells in the dermis in the absence of any exogenous endothelial cells. Further investigation in 2D cell cultures showed an indirect effect of putrescine on normal keratinocytes causing them to produce soluble factors that increased expression of CD133, CD34 and CD31 in cultured human dermal fibroblasts, previously negative for these antigens. This study reports a new and improved model of psoriasis for in vitro studies and offers a new insight into early stage neovascularization, which is of relevance not only to psoriasis, but to tissue engineering and wound healing in general.