Objective To study the role of microRNA(miR)-483-3p in reducing myocardial fibrosis in rats,and explore the relationship between its mechanism and autophagy.Methods A total of 24 male SD rats were randomly divided into sham operation group,model group,blank transfec-tion group and high expression group,with 6 rats in each group.The blank transfection group and the high-expression group were pretreated with a single injection of adeno-associated virus(AAV)-blank transfection and AAV-miR-483-3p(5×1011 vg)in the tail vein,respectively.In 14 d later,the sham group was injected with 2.5 ml/(kg·d)normal saline for 14 d,and rat model of myocardial fibrosis was established by 2 mg/ml isoproterenol[2.5 ml/(kg·d)]injection through tail vein for 14 consecutive days.Myocardial pathological damage,severity of myocardial fibrosis,and expression levels of collagen-Ⅰ,microtubule-associated protein light chain 3(LC3),autoph-agy-related protein 5(Atg5)and autophagy degradation substrate(P62)in cardiomyocytes were evaluated and measured.Results Compared with the sham operation group,the model group had obviously larger myocardial fibrosis area,higher positive expression of Collagen-Ⅰ,and increased protein levels of Atg5 and LC3-Ⅱ/LC3-Ⅰ,and decreased expression level of P62 protein(P＜0.05).The myocardial fibrosis area,positive expression of Collagen-Ⅰ,the expression levels of Atg5 and LC3-Ⅱ/LC3-Ⅰ protein[(13.64±1.51)％vs(27.47±1.55)％,(13.48±3.07)％vs(30.91±2.45)％,0.98±0.17 vs 1.24±0.28,0.66±0.05 vs 1.26±0.09,P＜0.05]were significant-ly decreased,and the expression level of P62 was notably increased(0.91±0.11 vs 0.74±0.06,P＜0.05)in the high expression group than the model group.Conclusion MiR-483-3p attenuates myocardial fibrosis in rats,and the mechanism may be related to the inhibition of cardiomyocyte autophagy.

Pediatric early warning system（PEWS）monitors the children's temperature，blood pressure，heart rate，respiration，consciousness，oxygen saturation and various physiological indicators to form a score，which helps medical staff to identify the changes of children's condition in the early stage，with high sensitivity and specificity. In addition，PEWS is of great help in the transportation of children under emergent conditions or with critical illness. PEWS application can greatly reduce the risk of in-hospital and out-of-hospital transport，optimize the allocation of medical staff，and promote the early identification and treatment of children with serious conditions. However，the lack of standard PEWS and related guidelines，as well as the limited development of basic theories，can affect the consistency of the definition，implementation and effective evaluation of PEWS. Therefore，this article will review the development of PEWS and its application in emergency transport，so as to provide reference for improving the quality of emergency pediatric transport.

Extranodal NK/T cell lymphoma, nasal type（ENKTL） is a highly aggressive malignant tumor derived from NK cells. This article reports a case of ENKTL invading the larynx and digestive tract. The clinical clinical manifestations include hoarseness and intranasal masses.
Humans ; Lymphoma, Extranodal NK-T-Cell/pathology* ; Nose/pathology* ; Nose Neoplasms/pathology* ; Larynx/pathology* ; Gastrointestinal Tract/pathology*

Heat shock proteins (HSPs) widely exist in all organisms, the structures of which are usually extraordinarily conservative. They are also well-known stress proteins that are involved in response to physical, chemical and biological stresses. HSP70 is an important member of the HSPs family. In order to study the roles of amphibians HSP70 during infection, the cDNA sequence of Rana amurensis hsp70 family genes were cloned by homologous cloning method. The sequence characteristics, three-dimensional structure and genetic relationship of Ra-hsp70s were analyzed by bioinformatics methods. The expression profiles under bacterial infection were also analyzed by real-time quantitative PCR (qRT-PCR). Expression and localization of HSP70 protein were tested by immunohistochemical techniques. The results showed that three conservative tag sequences of HSP70 family, HSPA5, HSPA8 and HSPA13, were found in HSP70. Phylogenetic tree analysis indicated four members are distributed in four different branches, and members with the same subcellular localization motif are distributed in the same branch. The relative expression levels of the mRNA of four members were all significantly upregulated (P < 0.01) upon infection, but the time for up-regulating the expression levels were diverse in different tissues. The immunohistochemical analysis showed that HSP70 was expressed to different degrees in the cytoplasm of liver, kidney, skin and stomach tissue. The four members of Ra-hsp70 family have ability to respond bacterial infection to varying degrees. Therefore, it was proposed that they are involved in biological processes against pathogen and play different biological functions. The study provides a theoretical basis for functional studies of HSP70 gene in amphibians.
Heat-Shock Proteins/genetics* ; Phylogeny ; Amino Acid Sequence ; HSP70 Heat-Shock Proteins/metabolism* ; Stress, Physiological

The field of two-dimensional (2D) nanomaterial-based cancer immunotherapy combines research from multiple subdisciplines of material science, nano-chemistry, in particular nano-biological interactions, immunology, and medicinal chemistry. Most importantly, the "biological identity" of nanomaterials governed by bio-molecular corona in terms of bimolecular types, relative abundance, and conformation at the nanomaterial surface is now believed to influence blood circulation time, bio-distribution, immune response, cellular uptake, and intracellular trafficking. A better understanding of nano-bio interactions can improve utilization of 2D nano-architectures for cancer immunotherapy and immunotheranostics, allowing them to be adapted or modified to treat other immune dysregulation syndromes including autoimmune diseases or inflammation, infection, tissue regeneration, and transplantation. The manuscript reviews the biological interactions and immunotherapeutic applications of 2D nanomaterials, including understanding their interactions with biological molecules of the immune system, summarizes and prospects the applications of 2D nanomaterials in cancer immunotherapy.

Objective:To understand the status and influencing factors of the bowel function in patients with rectal cancer after sphincter-preserving surgery, and then to improve the patients′ quality of life.Methods:From January 2017 to April 2020, a total of 179 patients with rectal cancer after sphincter-preserving surgery in Sun Yat-sen University Cancer Center were selected as study subjects. General questionnaire and the scale about bowel function of patients with rectal cancer after sphincter-preserving surgery were used to investigate.Results:The total score of bowel function in patients with rectal cancer after sphincter-preserving surgery was (71.82±7.67), and the average score of all the items was (3.99 ± 0.43). In all dimensions of intestinal function, the average score of "defecation affected by diet" was the highest (4.39 ± 0.80), followed by "frequent and urgent defecation" (4.22 ± 0.49), and the average score of "defecation paresthesia" was the lowest (3.03 ± 0.67). Tumor distance from the anal border was the influencing factor of bowel function in patients with rectal cancer after sphincter-preserving surgery ( P<0.05). Conclusions:The bowel function of patients with rectal cancer after sphincter-preserving surgery was well, while the bowel function of patients with rectal cancer after sphincter-preserving surgery with the distance between the tumor and the lower edge of the anus <5.0 cm was relatively poor.

Objective:To explore the effectiveness of Caprini risk assessment model in screening deep vein thrombosis (DVT) formation in patients with preoperative hip fractures.Methods:This study was a retrospective cohort study. From January 2017 to December 2018, a total of 242 patients with hip fractures in the orthopedic trauma ward of Peking Union Medical College Hospital were selected as the research subjects by the convenient sampling method. 46 patients diagnosed with DVT by Doppler ultrasonography of lower extremities before surgery were set as the DVT group, while 196 non-DVT patients were set as the non-DVT group. The risk factors of preoperative DVT in patients with hip fractures screened by Caprini risk assessment model were analyzed by binomial logistic regression, and the optimal risk stratification for preoperative DVT in patients with hip fracture was determined based on Caprini score. ROC curve was used to evaluate the clinical predictive efficacy of Caprini risk assessment model.Results:Caprini score of patients in the DVT group was 11.0 (9.8, 12.0) , which was higher than 9.0 (9.0, 11.0) of patients in the non-DVT group, and the difference was statistically significant ( Z=-4.009, P<0.01) . Binomial logistic regression analysis showed that, past or current history of malignant tumors and venous thromboembolism were the main risk factors for preoperative DVT in patients with hip fractures ( OR=3.162, 31.107; P<0.05) . The preoperative risk of DVT in patients with hip fractures assessed by Caprini risk stratification as extremely high-risk (≥12 points) was 6.017 times that of patients with intermediate-risk (7-9 points) , and the difference was statistically significant ( P< 0.01) . The preoperative risk of DVT in patients with hip fractures rated as high-risk risk grade (10-11 points) was 2.836 times that of patients with intermediate-risk risk grade (7-9 points) , and the difference was statistically significant ( P=0.010) . The optimal critical value of Caprini score was 9.5, and the area under the ROC curve was 0.684 (95% CI: 0.597-0.772, P<0.01) . Conclusions:Caprini risk stratification can effectively predict the high-risk population of preoperative DVT in patients with hip fractures. Clinical nurses should focus on the thrombosis prevention and nursing of patients with extremely high-risk and high-risk hip fractures.

The clinical data, follow-up records and genetic results of a child with growth retardation and systemic multiple malformations, of whom was diagnosed Loeys Dietz syndrome (LDS), were retrospectively analyzed.This was a 3 years and 3 months old boy presented with incomplete cleft palate, spasm of middle fingers in both hands, hernia and hyperextension of knee joint.Color doppler ultrasound showed dilation of aortic sinus and ascending aorta, and mo-derate aortic regurgitation in the child.The analysis of genetic cardiovascular gene sequencing showed that there was a heterozygous mutation in TGFβR2 gene, which was a missense mutation.The child was diagnosed LDS type 2 according to the results of gene detection and clinical characteristics.He underwent " Bentall" aortic valve replacement + coronary artery lengthening transplantation (Cabrol) in Guangdong Provincial People′s Hospital.Postoperative recovery was satisfactory.This is the youngest case of Bentall operation reported in China.Connective tissue and organs are involved in the LDS.Systemic arteries, especially big arteries, are seriously involved and progressing rapidly.The combination of gene detection and clinical symptoms is the great value in the differential diagnosis of LDS.Echocardiography is an important method to monitor the progress of cardiovascular disease in children with LDS, which is important for the selection of surgical methods and timing.Bentall operation can also achieve good prognosis in children under 4 years old.

The pneumonia caused by the novel coronavirus (2019-nCoV), which began in December 2019, has become the most serious public health problem, threatening people's health and life. This threat is posing a severe challenge on the diagnosis and treatment of 2019-nCoV infection, the prevention and control of hospital cross infection of medical staff. It is suggested that in addition to strengthening the organization and leadership of the abovementioned work, establishing and improving the prevention and control mechanism deserve greater attention. Furthermore, special attention should be given to the safety of the medical staff, strengthening their infection monitoring and outbreak management. Medical staff in different work areas and positions should be placed under careful protection, cleaning and disinfection measures. The protection during specimen collection, transportation and medical waste management should also be prioritized. This paper also put forward management suggestions for the outpatient department, isolation ward and other key departments. These measures are proposed to provide a guidance for the prevention and control of 2019-nCoV nosocomial infection in the pediatric outpatient and ward.