https://www.selleckchem.com/products/gdc-0994.html CDR1as is a well-identified circular RNA with regulatory roles in a variety of physiological processes. However, the effects of CDR1as on stemness of periodontal ligament stem cells (PDLSCs) and the underlying mechanisms remain unclear. In this study, we detect CDR1as in human PDLSCs, and subsequently demonstrate that CDR1as maintains PDLSC stemness. Knockdown of CDR1as decreases the expression levels of stemness-related genes and impairs the cell's multi-differentiation and cell migration abilities, while overexpression of CDR1as increases the expression levels of stemness-related genes and enhances these abilities. Furthermore, our results indicate that the RNA-binding protein hnRNPM directly interacts with CDR1as and regulates its expression in PDLSCs. In addition, we show that CDR1as promotes the expression of stemness-related genes in PDLSCs by inhibiting miR-7-mediated suppression of KLF4 expression. Collectively, our results demonstrate that CDR1as participates in the molecular circuitry that regulates PDLSC stemness.Minimally invasive approaches, including laparoscopic procedures, have increasingly been applied in surgery due to their advantages such as reduced surgical trauma, a better quality of life, shorter hospital stay, and less postoperative morbidity compared with open surgeries.(1) Minimally invasive approaches in liver transplantation (LT) may have similar advantages for the recipients, including less pain and a shorter hospital stay, which could facilitate rehabilitation. Outbreak of corona virus disease in 2019 (COVID-19) has resulted in significant morbidity and mortality worldwide. Our aim is to document hematological parameters of patients with COVID-19 during initial stage of diagnosis and to identify early hematological indicators of severe infection. This retrospective study was conducted at Shifa International Hospital, Pakistan from April to November 2020. Patients hospitalized with COVID