The Effect of Social Support on Mental Health in Chinese Adolescents During the Outbreak of COVID-19.

Purpose: The coronavirus disease 2019 (COVID-19) outbreak impacts physical and mental health. The purpose of this study was to explore the association between the levels of social support and mental health among Chinese adolescents during the outbreak.

Methods: A total of 7,202 adolescents aged 14-18 years completed online survceys from March 8 to 15, 2020, in China.

[Urotensin II induces hypertrophy of in vitro cultured neonatal rat cardiac myocytes].

Objective: To examine whether urotensinII (UII) induces hypertrophy of neonatal rat cardiomyocytes cultured in vitro.

Methods: The primary cardiac myocytes cultured for 40 h followed by further culture in serum-free media for another 24 h were subjected to exposure to UII of varied concentrations for 24 h, after which the changes in the size of the cells were analyzed by flow cytometry with (3)H-leucine incorporation also measured.

Results: At the concentration of 1x10(-7) mol/L, UIIcould increase the size of the cultured cardiac myocardial cells (P=0.

[Effects of urotensin II on cultured cardiac fibroblast proliferation and collagen type I mRNA expression].

Objective: To observe the effect of urotensin II on cultured cardiac fibroblast collagen type I mRNA expression and proliferation, thereby to explore the role of urotensin II in myocardial remodeling in the event of cardiac failure.

Methods: Cardiac fibroblasts of neonatal Sprague-Dawley rats isolated by trypsin digestion method were stimulated by urotensin II at varied concentrations when the cells reached growth arrest. MTT assay was employed to measure the proliferation and determine the number of the cells, and reverse transcriptional (RT)-PCR used to detect the collagen mRNA expression.