Objective: To explore the relationship between physical exercise and parenting styles, and psychological resilience among college students, in order to provide guidance for improving college students physical exercise status. Methods: From September 10, 2022 to January 6, 2023, 1 227 students from three comprehensive universities in Jinan were selected for investigation using a stratified random sampling and convenient sampling method. Physical exercise was assessed using the Physical Activity Rating Scale, parenting style was evaluated with the short-Egna Minnen av Barndoms Uppfostran for Chinese (s-EMBU-C), and psychological resilience was measured by the Resilience Scale for Chinese Adolescents (RSCA). The influence of parenting style and psychological resilience on physical exercise was explored by Pearson correlation analysis, linear and Logistic regression analysis. Results: A total of 815 (66.42%) engaged in lowintensity exercise, 308 (25.10%) in moderateintensity exercise, and 104 (8.48%) in highintensity exercise. The total score on the Physical Activity Rating Scale was (22.15±0.72). Logistic regression analysis showed that gender (OR=1.58, 95%CI=1.07-2.33) and whether the student was a sports specialist (OR=1.61, 95%CI=1.17-2.22) were the related factors for college students physical exercise classification(P<0.05). Linear regression analysis showed that emotional warmth dimensions of the s-EMBU-C (mother version and father version), the total score of s-EMBU-C(mother version), positive cognition, emotional control and the total score of RSCA all affected the physical activity level of college students (β=0.29, 0.20, 0.26, 0.32, 0.15, 0.20, P<0.05). Conclusions College students physical exercise behavior is closely related to gender, sports specialization, parenting styles, and psychological resilience. Colleges and universities can promote changes in physical exercise behavior among college students through joint parental supervision and psychological counseling.

To summarize the nursing experience of a child with severe cardiopulmonary failure caused by fulminant myocarditis who underwent autologous vascular bypass grafting after severe lower limb ischemia during extracorporeal membrane oxygenation therapy.The key points of nursing include:①keeping the distal perfusion tube unobstructed before surgery to avoid aggravation of ischemia of the affected limb;physical precautions for deep vein thrombosis are strictly implemented to ensure the patency of the saphenous vein.②intraoperative nursing cooperation for the conversion of venous-arterial-venous extracorporeal membrane oxygenation to venous-venous extracorporeal membrane oxygenation.③on the premise of ensuring systemic perfusion after surgery,the blood pressure should be strictly controlled to prevent the rupture of the grafted vessel;to strengthen the management of coagulation to prevent bleeding and thrombosis;different position management of both lower limbs to keep the grafted blood vessels patency;to develop individualized exercise programs to enhance nutrition and promote rapid recovery;to give individualized psychological nursing care including childlike fun and sense of security,and eliminate children's negative emotions;to develop systematic health guidance and follow-up to improve the quality of family care for children.After treatment and nursing care,the postoperative grafted blood vessels were well anastomosed with no limb ischemia,and there was no swelling of the limb in the saphenous vein donor area.After 41 days of the treatment,the extracorporeal membrane oxygenation was withdrawn.The child recovered and discharged after 122 days;after 2 years of follow-up,the child could walk normally and recovered well.

Objectives To develop a multi-stage and multi-epitope vaccine, which consists of epitopes from the early secretory and latency-associated antigens of Mycobacterium tuberculosis (MTB). Methods The B-cell, cytotoxic T-lymphocyte (CTL) and helper T-lymphocyte (HTL) epitopes of 12 proteins were predicted using an immunoinformatics. The epitopes with antigenicity, without cytotoxicity and sensitization, were further screened to construct the multi-epitope vaccine. Furthermore, the proposed vaccine underwent physicochemical properties analysis and secondary structure prediction as well as 3D structure modeling, refinement and validation. Then the refined model was docked with TLR4. Finally, an immune simulation of the vaccine was carried out. Results The proposed vaccine, which consists of 12 B-cell, 11 CTL and 12 HTL epitopes, had a flexible and stable globular conformation as well as a thermostable and hydrophilic structure. A stable interaction of the vaccine with TLR4 was confirmed by molecular docking. The efficiency of the candidate vaccine to trigger effective cellular and humoral immune responses was assessed by immune simulation. Conclusion A multi-stage multi-epitope MTB vaccine construction strategy based on immunoinformatics is proposed, which is expected to prevent both active and latent MTB infection.
Mycobacterium tuberculosis/metabolism* ; Molecular Docking Simulation ; Toll-Like Receptor 4 ; Epitopes, T-Lymphocyte/chemistry* ; Epitopes, B-Lymphocyte/chemistry* ; Vaccines, Subunit/chemistry* ; Computational Biology/methods*

Objective:To investigate and summarize the chest CT imaging features of patients with novel coronavirus pneumonia (COVID-19), bacterial pneumonia and other viral pneumonia.Methods:Chest CT data of 102 patients with pulmonary infection due to different etiologies were retrospectively analyzed, including 36 patients with COVID-19 admitted to Hainan Provincial People's Hospital and the Second Affiliated Hospital of Hainan Medical University from December 2019 to March 2020, 16 patients with other viral pneumonia admitted to Hainan Provincial People's Hospital from January 2018 to February 2020, and 50 patients with bacterial pneumonia admitted to Haikou Affiliated Hospital of Central South University Xiangya School of Medicine from April 2018 to May 2020. Two senior radiologists and two senior intensive care physicians were participated to evaluated the extent of lesions involvement and imaging features of the first chest CT after the onset of the disease.Results:Bilateral pulmonary lesions were more common in patients with COVID-19 and other viral pneumonia, and the incidence was significantly higher than that of bacterial pneumonia (91.6%, 75.0% vs. 26.0%, P < 0.05). Compared with other viral pneumonia and COVID-19, bacterial pneumonia was mainly characterized by single-lung and multi-lobed lesion (62.0% vs. 18.8%, 5.6%, P < 0.05), accompanied by pleural effusion and lymph node enlargement. The proportion of ground-glass opacity in the lung tissues of patients with COVID-19 was 97.2%, that of patients with other viral pneumonia was 56.2%, and that of patients with bacterial pneumonia was only 2.0% ( P < 0.05). The incidence rate of lung tissue consolidation (25.0%, 12.5%), air bronchial sign (13.9%, 6.2%) and pleural effusion (16.7%, 37.5%) in patients with COVID-19 and other viral pneumonia were significantly lower than those in patients with bacterial pneumonia (62.0%, 32.0%, 60.0%, all P < 0.05), paving stone sign (22.2%, 37.5%), fine mesh sign (38.9%, 31.2%), halo sign(11.1%, 25.0%), ground-glass opacity with interlobular septal thickening (30.6%, 37.5%), bilateral patchy pattern/rope shadow (80.6%, 50.0%) etc. were significantly higher than those of bacterial pneumonia (2.0%, 4.0%, 2.0%, 0%, 22.0%, all P < 0.05). The incidence of local patchy shadow in patients with COVID-19 was only 8.3%, significantly lower than that in patients with other viral pneumonia and bacterial pneumonia (8.3% vs. 68.8%, 50.0%, P < 0.05). There was no significant difference in the incidence of peripheral vascular shadow thickening in patients with COVID-19, other viral pneumonia and bacterial pneumonia (27.8%, 12.5%, 30.0%, P > 0.05). Conclusions:The probability of ground-glass opacity, paving stone and grid shadow in chest CT of patients with COVID-19 was significantly higher than those of bacterial pneumonia, and it was more common in the lower lungs and lateral dorsal segment. In other patients with viral pneumonia, ground-glass opacity was distributed in both upper and lower lungs. Bacterial pneumonia is usually characterized by single lung consolidation, distributed in lobules or large lobes and accompanied by pleural effusion.

Objective:To explore the methods and effect of applying specialized training and multimedia education in key infection-related departments of a hospital to intervene standard precautions for clinical practice interns.Methods:Based on the cases of nosocomial infection at home and abroad, the Science and Education Section and Infection Management Section designed and produced videos about standard precautions and occupational protection. The content of these videos covered two fields including knowledge training and skill training, with emphasis on enhancing awareness of profession risks and skills of hospital infection control and occupational protection of 196 medical students through specialized training in key infection-related departments. The training effect of standard precautions education for the two groups of students was evaluated from the theoretical test scores, questionnaire survey on their attitude and compliance to standard precautions, and the incidence of their occupational exposure to needle stab wound. SPSS 18.0 was performed for t test and chi-square test. Results:Apart from the knowledge of the unfavorable factors of implementing standard precautions, there were significant differences between the experimental group and the control group in six aspects: theoretical test scores, hospital infection risk cognition, significance cognition of standard precautions, favorable factors of implementing standard precautions, self-efficacy evaluation and self-evaluation of compliance to standard precautions ( P<0.05). And there was significant difference in the incidence of occupational exposure to needle stab wound between the experiment group and control group (1.02% vs. 7.14%; χ2=4.69, P<0.05). Conclusion:Various teaching interventions of standard precautions during the entire internship period have expanded and deepened the contents of school education, enabling the students to form good occupational risk awareness and coping skills to protect the patients and themselves.

ObjectiveTo establish a droplet digital PCR (ddPCR) method for detecting hepatitis B virus (HBV) covalently closed circular DNA (cccDNA). MethodsHBV cccDNA standard substance was constructed, and HBV cccDNA primers and probes were designed based on the structural differences between HBV cccDNA and relaxed circular DNA (rcDNA). HBV plasmid was amplified to obtain HBV cccDNA standard substance, and a ddPCR detection method was established with the standard substance after gradient dilution as the template for HBV cccDNA detection; the limit of detection and repeatability of this method were analyzed. Liver tissue samples were collected from 20 patients who attended Beijing YouAn Hospital, Capital Medical University, from June 2017 to October 2020, all of whom were diagnosed with HBV infection, and DNA of the samples was extracted and digested with plasmid-safe ATP-dependent DNA enzyme to obtain HBV cccDNA template; the ddPCR detection method was evaluated in clinical samples and was compared with the quantitative real-time PCR (qPCR) detection method. The chi-square test was used for comparison of categorical data between the two groups. ResultsThe HBV cccDNA detection method based on ddPCR was established, which accurately detected HBV cccDNA in standard substance after gradient dilution, with a limit of detection of 1 copy/μl, and the coefficients of variation of 1×103, 1×102, and 1×101 copies/μl standard substances were 441%, 3.98%, and 5.09%, respectively. HBV cccDNA was detected in the samples of 20 patients with HBV infection; the ddPCR detection method detected HBV cccDNA in 17 patients, with a positive rate of 85%, while the qPCR detection method detected HBV cccDNA in 11 patients, with a positive rate of 55%, and there was a significant difference between the two methods (χ2=4.286, P=0038). ConclusionThe established ddPCR method for detecting HBV cccDNA has a low limit of detection and good repeatability, which provides an effective tool for further clinical detection.

Objective:To retrieve, evaluate and summarize the evidence for the prevention of pressure injury in adult patients with acute respiratory distress syndrome (ARDS) and mechanical ventilation in prone position, to provide a basis for clinical nurses in the management of pressure injury in patients with mechanical ventilation in the prone position of ARDS.Method:UpToDate, BMJ Best Practice, Guidelines International Network, National Guideline Clearinghouse, National Institute for Health and Clinical Excellence, Joanna Briggs Institute (JBI) Evidence-based Health Care Centre, Cochrane Library, Medlive, EMBASE, PubMed, BMJ, CNKI, Wanfang Database and SinoMed were systematically retrieved to search evidence on the prevention of pressure injury in adults with ARDS and mechanical ventilation in prone position, including clinical decision-making, guidelines, evidence summary, systematic evaluation, Meta-analysis, RCT and quasi-experimental studies. The search time limit was from December 1, 2010 to December 1, 2020. The literature quality was evaluated by 4 personnel, and the included literature was extracted and summarized by 2 personnel.Result:Finally, 7 articles were included, including 1 clinical decision, 3 guidelines, 2 RCTs and 1 quasi-experimental study. A total of 12 pieces of evidence were extracted from 5 aspects, such as evaluation, intervention measures, supervision, professional knowledge training of nursing staff and principles of prevention and compliance.Conclusions:The best evidence for the prevention of pressure injury in adult ARDS patients with prone mechanical ventilation summarized in this study is convenient for clinical nurses to conduct more targeted and scientific evaluation and care of pressure injury for patients.

The expression of histone lysine-specific demethylase 1 (LSD1) in colorectal cancer cells is increased, and LSD1 is closely related to its occurrence, development, proliferation, invasion and metastasis. LSD1 is a demethylase whose function depends on flavin adenine dinucleoside. It can specifically catalyze the demethylation reaction of histone lysine, and regulate the expression of target genes by reaction of demethyl and dimethyl (H3K4me, H3K4me2, H3K9me, and H3K9me2) at the 4th and 9th positions of lysine H3. Targeted inhibition of LSD1 has been proved to be able to exert significant anti-tumor effect, but since the tumors involve multiple centers and factors, later studies have found that single inhibition of LSD1 cannot completely and effectively kill tumor cells. Moreover, the specificity of the LSD1 catalytic substrate depends to a large extent on the synergistic factors that bind to it and form complexes. The double-target inhibitors based on LSD1 shows more remarkable effect in tumor inhibition. Therefore, finding the combined synergistic factors of LSD1 may provide the basis for the research of multi-target inhibitors.

Objective: To investigate the endoplasmic reticulum stress (ERS) role in the course of liver failure induced by severe hepatitis B virus (HBV) infection and its related mechanism. Methods: Liver tissue samples and clinical data [chronic hepatitis B patients (12 cases, chronic hepatitis B group), hepatic failure induced by severe hepatitis B virus (12 cases, severe hepatitis B virus liver failure group), and normal subjects (8 cases, control group)] were collected from the Beijing You'an Hospital affiliated to Capital Medical University between 2009 to 2011. Statistical analysis was performed on the clinical indicators of each group. The structure of endoplasmic reticulum in liver tissue was observed by transmission electron microscopy. Western blot and qRT-PCR were used to detect the expression of endoplasmic reticulum stress and apoptosis-related factors, including glucose-regulated protein (Grp), and C/EBP homologous protein (CHOP). Frozen sections of liver tissues were prepared for immunofluorescence test. All data were expressed as mean ± standard deviation. LSD-t test was used to compare the results between groups. A p value < 0.05 was considered as statistically significant. Results: Transmission electron microscopy showed that the morphological structure of the endoplasmic reticulum was damaged in both groups (chronic hepatitis B and liver failure induced by severe hepatitis B virus), and liver failure induced by severe hepatitis B virus group was more critical. Western blot and qRT-PCR showed that Grp78, Grp94 and Caspase-4 were highly expressed in normal group and chronic hepatitis B group, and the relative protein expressions were 1.20 ± 0.13 and 0.78 ± 0.11, 0.90 ± 0.06 and 0.11 ± 0.01, 0.15 ± 0.02 and 0.22 ± 0.04, respectively. The expression of protein was weakened in liver failure induced by severe hepatitis B virus group (relative protein expression was 0.01 ± 0, 0.01 ± 0, and 0.11 ± 0.02, respectively).There was a statistically significant difference between the two groups (P < 0.05). The expression of CHOP was consistent with the results of immunofluorescence, and increased with the stressing of injury. Conclusion During the course of severe hepatitis B infection, dysregulated endoplasmic reticulum stress activated mild stress in chronic hepatitis B group, while severe stress in hepatic failure induced by severe hepatitis B virus group. Therefore, endoplasmic reticulum stress plays an important and complex role in the pathogenesis of hepatic failure induced by severe hepatitis B virus.

Objective To investigate the endoplasmic reticulum stress(ERS)role in the course of liver failure induced by severe hepatitis B virus(HBV)infection and its related mechanism.Methods Liver tissue samples and clinical data [chronic hepatitis B patients(12 cases,chronic hepatitis B group),hepatic failure induced by severe hepatitis B virus(12 cases,severe hepatitis B virus liver failure group),and normal subjects(8 cases,control group)] were collected from the Beijing You'an Hospital affiliated to Capital Medical University between 2009 to 2011.Statistical analysis was performed on the clinical indicators of each group.The structure of endoplasmic reticulum in liver tissue was observed by transmission electron microscopy.Western blot and qRT-PCR were used to detect the expression of endoplasmic reticulum stress and apoptosis-related factors,including glucose-regulated protein(Grp),and C/EBP homologous protein(CHOP).Frozen sections of liver tissues were prepared for immunofluorescence test.All data were expressed as mean±standard deviation.LSD-t test was used to compare the results between groups.A p value<0.05 was considered as statistically significant.Results Transmission electron microscopy showed that the morphological structure of the endoplasmic reticulum was damaged in both groups(chronic hepatitis B and liver failure induced by severe hepatitis B virus),and liver failure induced by severe hepatitis B virus group was more critical.Western blot and qRT-PCR showed that Grp78,Grp94 and Caspase-4 were highly expressed in normal group and chronic hepatitis B group,and the relative protein expressions were 1.20±0.13 and 0.78±0.11,0.90±0.06 and 0.11±0.01,0.15±0.02 and 0.22±0.04,respectively.The expression of protein was weakened in liver failure induced by severe hepatitis B virus group(relative protein expression was 0.01±0,0.01±0,and 0.11±0.02,respectively).There was a statistically significant difference between the two groups(P<0.05).The expression of CHOP was consistent with the results of immunofluorescence,and increased with the stressing of injury.Conclusion During the course of severe hepatitis B infection,dysregulated endoplasmic reticulum stress activated mild stress in chronic hepatitis B group,while severe stress in hepatic failure induced by severe hepatitis B virus group.Therefore,endoplasmic reticulum stress plays an important and complex role in the pathogenesis of hepatic failure induced by severe hepatitis B virus.