An Interpretable Fake News Detection Method Based on Commonsense Knowledge Graph

Existing deep learning-based methods for detecting fake news are uninterpretable, and they do not use external knowledge related to the news. As a result, the authors of the paper propose a graph matching-based approach combined with external knowledge to detect fake news. The approach focuses on extracting commonsense knowledge from news texts through knowledge extraction, extracting background knowledge related to news content from a commonsense knowledge graph through entity extraction and entity disambiguation, using external knowledge as evidence for news identification, and interpreting the final identification results through such evidence. To achieve the identification of fake news containing commonsense errors, the algorithm uses random walks graph matching and compares the commonsense knowledge embedded in the news content with the relevant external knowledge in the commonsense knowledge graph. The news is then discriminated as true or false based on the results of the comparative analysis. From the experimental results, the method can achieve 91.07%, 85.00%, and 89.47% accuracy, precision, and recall rates, respectively, in the task of identifying fake news containing commonsense errors.

Therapeutic prospects of ceRNAs in COVID-19

Since the end of 2019, COVID-19 caused by SARS-CoV-2 has spread worldwide, and the understanding of the new coronavirus is in a preliminary stage. Currently, immunotherapy, cell therapy, antiviral therapy, and Chinese herbal medicine have been applied in the clinical treatment of the new coronavirus;however, more efficient and safe drugs to control the progress of the new coronavirus are needed. Long noncoding RNAs (lncRNAs), microRNAs (miRNAs), and circular RNAs (circRNAs) may provide new therapeutic targets for novel coronavirus treatments. The first aim of this paper is to review research progress on COVID-19 in the respiratory, immune, digestive, circulatory, urinary, reproductive, and nervous systems. The second aim is to review the body systems and potential therapeutic targets of lncRNAs, miRNAs, and circRNAs in patients with COVID-19. The current research on competing endogenous RNA (ceRNA) (lncRNA-miRNA-mRNA and circRNA-miRNA-mRNA) in SARS-CoV-2 is summarized. Finally, we predict the possible therapeutic targets of four lncRNAs, MALAT1, NEAT1, TUG1, and GAS5, in COVID-19. Importantly, the role of PTEN gene in the ceRNA network predicted by lncRNA MALAT1 and lncRNA TUG1 may help in the discovery and clinical treatment of effective drugs for COVID-19.

Dynamic response landscape of immune cells identified immune dysfunction which predicts disease progression in COVID-19 infected patients.

During the development of COVID-19 caused by SARS-CoV-2 infection from mild disease to severe disease, it can trigger a series of complications and stimulate a strong cellular and humoral immune response. However, the precise identification of blood immune cell response dynamics and the relevance to disease progression in COVID-19 patients remains unclear. We propose for the first time to use changes in cell numbers to establish new subgroups, which were divided into four groups: first from high to low cell number (H_L_Group), first from low to high (L_H_Group), continuously high (H_Group), and continuously low (L_Group). It was found that in the course of disease development. In the T cell subgroup, the immune response is mainly concentrated in the H_L_Group cell type, and the complications are mainly in the L_H_Group cell type. In the NK cell subgroup, the moderate patients are mainly related to cellular immunity, and the severe patients are mainly caused by the disease, while severe patients are mainly related to complications caused by diseases. Our study provides a dynamic response of immune cells in human blood during SARS-CoV-2 infection and the first subgroup analysis using dynamic changes in cell numbers, providing a new reference for clinical treatment of COVID-19.

The Impact of Physical Activity on Mental Health during COVID-19 Pandemic in China: A Systematic Review.

The outbreak and spread of novel coronavirus disease (COVID-19) in 2019 was a public health emergency of global concern. As an important health behavior, physical activity (PA) and its impact on mental health have been increasingly explored during the epidemic period. The keywords and references were searched on PubMed, Web of Science, Scopus, Cochrane Library, EBSCO, and CNKI since the inception of an electronic bibliographic database until October 2021. A total of 2979 articles were identified, of which 23 were eligible for inclusion to examine the relationship between PA and mental health during the COVID-19 epidemic. Residents with regular PA, high-intensity PA, and PA duration of 30-60 min or more per day were associated with a lower risk of anxiety, depression, and negative emotions. In contrast, residents with no exercise and physical inactivity were more likely to have anxiety, depression, sleep disturbances, and lower subjective well-being. In addition, the dose-response curve between PA and negative emotions indicated a U-shaped relationship, and there were urban-rural differences in the relationship between emotional status and the levels of PA in adolescents. The findings have significant implications for addressing mental health issues during the current pandemic and future pandemics. Future studies adopting an experimental study design, conducting objective PA measures, and focusing on the vulnerable subpopulations are warranted to further explore the association of PA on mental health during the COVID-19 pandemic.

Safety, tolerability, and pharmacokinetics of VV116, an oral nucleoside analog against SARS-CoV-2, in Chinese healthy subjects.

VV116 (JT001) is an oral drug candidate of nucleoside analog against SARS-CoV-2. The purpose of the three phase I studies was to evaluate the safety, tolerability, and pharmacokinetics of single and multiple ascending oral doses of VV116 in healthy subjects, as well as the effect of food on the pharmacokinetics and safety of VV116. Three studies were launched sequentially: Study 1 (single ascending-dose study, SAD), Study 2 (multiple ascending-dose study, MAD), and Study 3 (food-effect study, FE). A total of 86 healthy subjects were enrolled in the studies. VV116 tablets or placebo were administered per protocol requirements. Blood samples were collected at the scheduled time points for pharmacokinetic analysis. 116-N1, the metabolite of VV116, was detected in plasma and calculated for the PK parameters. In SAD, AUC and Cmax increased in an approximately dose-proportional manner in the dose range of 25-800 mg. T1/2 was within 4.80-6.95 h. In MAD, the accumulation ratio for Cmax and AUC indicated a slight accumulation upon repeated dosing of VV116. In FE, the standard meal had no effect on Cmax and AUC of VV116. No serious adverse event occurred in the studies, and no subject withdrew from the studies due to adverse events. Thus, VV116 exhibited satisfactory safety and tolerability in healthy subjects, which supports the continued investigation of VV116 in patients with COVID-19.

The role of Fibrinogen-like proteins in Cancer.

Fibrinogen-associated protein (FREP) family is a family of proteins with a fibrin domain at the carboxyl terminus. Recent investigations illustrated that two members of FREP family, fibrinogen-like protein-1 (FGL1) and fibrinogen-like protein-2 (FGL2), play crucial roles in cancer by regulating the proliferation, invasion, and migration of tumor cells, or regulating the functions of immune cells in tumor microenvironment. Meanwhile, they are potential targets for medical intervention of tumor development. In this review, we discussed the structure, and the roles of FGL1 and FGL2 in tumors, especially the roles in regulating immune cell functions.

Psychosocio-economic impacts of COVID-19 on gastroenterology and endoscopy practice.

Beyond posing a major health crisis, the COVID-19 pandemic has inflicted profound psychological, social, and economic impacts on populations worldwide. Mass quarantines and social isolation have affected the mental health of the wider population, exacerbating other stressors, including fear of the virus and its repercussions, general uncertainty, and financial insecurity. The pandemic has challenged the broader delivery of healthcare--ranging from the need to triage limited hospital resources to balancing risk mitigation with maintaining medical care. Specific to gastroenterology, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has not only been associated with complicating extant medical conditions of the gastrointestinal (GI) tract, but has also forced a shift in the practice of gastroenterology by patients, families, and healthcare providers alike. The gastroenterology field has been required to adapt its practices to minimize the possibility of viral spread while still upholding patient care. Healthcare practitioners in GI have helped to treat COVID-19 patients, stratified inpatient and outpatient visits and procedures, and shifted to telemedicine. Still, as is the case with much of the general population, healthcare providers working in GI practice or endoscopy have faced personal and professional stressors, mental health difficulties, social isolation, financial pressures, and familial burdens--all of which can take a toll on practitioners and, by extension, the provision of GI care overall. This article will highlight how the COVID-19 pandemic has affected the psychological wellbeing, social engagement, and economic conditions of the public, healthcare providers, and GI professionals specifically. Recommendations for strategies that can continue GI services while maintaining safety for both caregivers and patients are put forth to help uphold critical GI care during this worldwide crisis.

The mental health of Chinese healthcare staff in non-epicenter of COVID-19: a cross-sectional study.

BACKGROUND: The COVID-19 is a public health issue all over the world. It is an unprecedented challenge for society. Frontline medical staff are at high risk of mental health problems due to the overwhelming workload, worry of infection, and inadequate protective instruments. The study is to investigate the psychological status of medical staff in a women and children's hospital in non-epicenter of COVID-19 during the early stage of the COVID-19 outbreak. METHODS: A total of 2,143 hospital medical staff participated in a cross-sectional online survey. Psychological response levels were assessed using the Psychological Questionnaire on Emergency Events in Public Health (PQEEPH), and mental health status was measured using the Generalized Anxiety Disorder-7 (GAD-7) scale. RESULTS: Eligible responses were received from 1,890 (90.6%) women and 197 (9.4%) men. In total, 10.3% of respondents rated the psychological impact of the outbreak as moderate or severe, and 4% reported severe anxiety symptoms. CONCLUSIONS: Our findings indicated that the majority of the medical staff are in great level of mental health. The study demonstrates that females, the 31-40 age group, and those who have been widowed experienced greater levels of anxiety and therefore require more support. Furthermore, the cognition of medical workers might affect their emotional reactions. Measures to decrease anxiety during emergency outbreaks should therefore include communication strategies.

Pharmacokinetics and tissue distribution of remdesivir and its metabolites nucleotide monophosphate, nucleotide triphosphate, and nucleoside in mice.

Remdesivir (RDV) exerts anti-severe acute respiratory coronavirus 2 activity following metabolic activation in the target tissues. However, the pharmacokinetics and tissue distributions of the parent drug and its active metabolites have been poorly characterized to date. Blood and tissue levels were evaluated in the current study. After intravenous administration of 20 mg/kg RDV in mice, the concentrations of the parent drug, nucleotide monophosphate (RMP) and triphosphate (RTP), as well as nucleoside (RN), in the blood, heart, liver, lung, kidney, testis, and small intestine were quantified. In blood, RDV was rapidly and completely metabolized and was barely detected at 0.5 h, similar to RTP, while its metabolites RMP and RN exhibited higher blood levels with increased residence times. The area under the concentration versus time curve up to the last measured point in time (AUC0-t) values of RMP and RN were 4558 and 136,572 h∙nM, respectively. The maximum plasma concentration (Cmax) values of RMP and RN were 2896 nM and 35,819 nM, respectively. Moreover, RDV presented an extensive distribution, and the lung, liver and kidney showed high levels of the parent drug and metabolites. The metabolic stabilities of RDV and RMP were also evaluated using lung, liver, and kidney microsomes. RDV showed higher clearances in the liver and kidney than in the lung, with intrinsic clearance (CLint) values of 1740, 1253, and 127 mL/(min∙g microsomal protein), respectively.

Prevention and Control of COVID-19 of Children

With the initial development of novel coronavirus epidemic situation, the number of new cases of coronal pneumonia among children has increased. In order to make clear the diagnosis and carry out pathogen detection of novel crown pneumonia in many regions of the country, it is found that the number of children infected has increased significantly. During the epidemic, children’s lives need to be protected and their fears need to be eliminated. Therefore, we need to enhance the understanding of novel coronavirus pneumonia of children to prevent misdiagnosis, and conduct early diagnosis and treatment.

Anti-SARS-CoV-2 activities in vitro of Shuanghuanglian preparations and bioactive ingredients.

Human infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes coronavirus disease 2019 (COVID-19) and there is no cure currently. The 3CL protease (3CLpro) is a highly conserved protease which is indispensable for CoVs replication, and is a promising target for development of broad-spectrum antiviral drugs. In this study we investigated the anti-SARS-CoV-2 potential of Shuanghuanglian preparation, a Chinese traditional patent medicine with a long history for treating respiratory tract infection in China. We showed that either the oral liquid of Shuanghuanglian, the lyophilized powder of Shuanghuanglian for injection or their bioactive components dose-dependently inhibited SARS-CoV-2 3CLpro as well as the replication of SARS-CoV-2 in Vero E6 cells. Baicalin and baicalein, two ingredients of Shuanghuanglian, were characterized as the first noncovalent, nonpeptidomimetic inhibitors of SARS-CoV-2 3CLpro and exhibited potent antiviral activities in a cell-based system. Remarkably, the binding mode of baicalein with SARS-CoV-2 3CLpro determined by X-ray protein crystallography was distinctly different from those of known 3CLpro inhibitors. Baicalein was productively ensconced in the core of the substrate-binding pocket by interacting with two catalytic residues, the crucial S1/S2 subsites and the oxyanion loop, acting as a "shield" in front of the catalytic dyad to effectively prevent substrate access to the catalytic dyad within the active site. Overall, this study provides an example for exploring the in vitro potency of Chinese traditional patent medicines and effectively identifying bioactive ingredients toward a specific target, and gains evidence supporting the in vivo studies of Shuanghuanglian oral liquid as well as two natural products for COVID-19 treatment.

[Management and prevention of common skin problems during epidemic prevention and control of COVID-19].

In the ongoing fight against the epidemic of COVID-19, the medical staff has been under tremendous pressure. Wearing the protective equipment (masks, goggles, and protective screens) with a poor breathability for a long time causes various skin problems, such as allergies, excessive skin hydration, local mechanical injuries, and even secondary infections. In addition, in a closed environment, compression and friction aggravate skin reactions, which may compromise duty performance of the medical staff. It is therefore essential to provide timely treatment opinions and prevention methods for common skin problems. We also give suggestions concerning the preparation of medical kit for skin protection in the epidemic area.