Objective To investigate the effect of overexpression of LncRNA MEG3 on proliferation,migration and cisplatin sensitivity of hepatoma cells HepG2 and LM3 and explore the underlying and mechanism.Methods The expression of MEG3 in healthy individuals and patients with hepatocellular carcinoma(HCC)was analyzed by online bioinformatics analysis,and Real-time fluorescence quantitative PCR(qRT-PCR)was used to detect MEG3 expression in different HCC cell lines.A MEG3-overexpresing plasmid was transfected in HepG2 and LM3 cells,and the changes in cell proliferation and migration were examined using CCK8 assay and scratch assay.CCK8 assay was used to determine the inhibitory rate of cisplatin on the transfected cells.A reactive oxygen species(ROS)fluorescence probe(DCFH-DA)and malondialdehyde(MDA)kit were used to assess the changes in ROS production and MDA level in the cells.Western blotting was performed to detect the expression levels of ferroptosis-related proteins glutathione peroxidase 4(GPX4)and ferritin heavy chain 1(FTH1).Results The expression of MEG3 was significantly lower in HCC cells than in LO2 cells,which was consistent with the results of bioinformatic analysis(P<0.05).Overexpression of MEG3 in the HCC cell lines significantly suppressed cell proliferation and migration(P<0.05),increased the cell inhibition rate of cisplatin(P<0.05),enhanced cellular ROS production and increased MDA levels in the cells(P<0.05).MEG3 overexpression significantly decreased the expressions of GPX4 and FTH1 in the HCC cell lines.Conclusion The expression of MEG3 is decreased in HCC cells,and its overexpression inhibits proliferation and migration and enhances cisplatin sensitivity of HCC cells by promoting ferroptosis of the cells.

Objective To investigate the effect of overexpression of LncRNA MEG3 on proliferation,migration and cisplatin sensitivity of hepatoma cells HepG2 and LM3 and explore the underlying and mechanism.Methods The expression of MEG3 in healthy individuals and patients with hepatocellular carcinoma(HCC)was analyzed by online bioinformatics analysis,and Real-time fluorescence quantitative PCR(qRT-PCR)was used to detect MEG3 expression in different HCC cell lines.A MEG3-overexpresing plasmid was transfected in HepG2 and LM3 cells,and the changes in cell proliferation and migration were examined using CCK8 assay and scratch assay.CCK8 assay was used to determine the inhibitory rate of cisplatin on the transfected cells.A reactive oxygen species(ROS)fluorescence probe(DCFH-DA)and malondialdehyde(MDA)kit were used to assess the changes in ROS production and MDA level in the cells.Western blotting was performed to detect the expression levels of ferroptosis-related proteins glutathione peroxidase 4(GPX4)and ferritin heavy chain 1(FTH1).Results The expression of MEG3 was significantly lower in HCC cells than in LO2 cells,which was consistent with the results of bioinformatic analysis(P<0.05).Overexpression of MEG3 in the HCC cell lines significantly suppressed cell proliferation and migration(P<0.05),increased the cell inhibition rate of cisplatin(P<0.05),enhanced cellular ROS production and increased MDA levels in the cells(P<0.05).MEG3 overexpression significantly decreased the expressions of GPX4 and FTH1 in the HCC cell lines.Conclusion The expression of MEG3 is decreased in HCC cells,and its overexpression inhibits proliferation and migration and enhances cisplatin sensitivity of HCC cells by promoting ferroptosis of the cells.

Objective:To explore the effect of online appointment system of standardized patients (SP) in cardiology practice teaching.Methods:The undergraduate students who entered the cardiology department of Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine for clinical practice in 2018 and 2019 were selected as teaching objects, and they were divided into traditional teaching group ( n=30) and appointed SP teaching group ( n=30). After the teaching, SPSS 19.0 software was used for data analysis to compare the teaching effect of the two groups. Results:The scores of SP teaching group were higher than those of traditional teaching control group, with statistical significance ( P<0.05). Conclusion:Through constructing SP database and typical case database, online appointment system of SP for medical history inquiry and doctor-patient communication skills training can effectively solve the problems such as lack of clinical practice cases and doctor-patient contradiction, and greatly improve the teaching efficiency.

OBJECTIVE: To investigate the effects of overexpression of long noncoding RNA (lncRNA) MEG3 on the proliferation and invasion of glioblastoma U251 cells by suppressing the expression of hypoxia inducible factor 1 METHODS: The expression of lncRNA MEG3 and HIF1 RESULTS: The expression of MEG3 was significantly lower and HIF1 CONCLUSIONS MEG3 overexpression inhibits the proliferation and invasion of U251 cells through suppressing the expression of HIF1
Apoptosis ; Cell Line, Tumor ; Cell Movement/genetics* ; Cell Proliferation/genetics* ; Gene Expression Regulation, Neoplastic ; Glioblastoma/genetics* ; Humans ; MicroRNAs ; RNA, Long Noncoding/genetics*

Objective:To explore the effect of online appointment system of standardized patient in cardiology practice teaching.Methods:The undergraduate students who entered the cardiology department for clinical practice in 2018 and 2019 were selected as teaching objects, and they were divided into traditional teaching group ( n=30) and appointed SP teaching group ( n=30). After the teaching, SPSS 19.0 software was used for data analysis to compare the teaching effect of the two groups. Results:The scores of SP teaching group were higher than those of traditional teaching control group, with statistical significance ( P<0.05). Conclusion:Through constructing standardized patient database and typical case database, online appointment system of standardized patient for medical history inquiry and doctor-patient communication skills training can effectively solve the problems such as lack of clinical practice cases and doctor-patient contradiction, and greatly improve the teaching efficiency.

Objective: To describe the CT features and clinical characteristics of pediatric patients with coronavirus disease 2019 (COVID-19).Method: A total of 9 COVID-19 infected pediatric patients were included in this study.Clinical history,laboratory examination,and detailed CT imaging features were analyzed.All patients underwent the first CT scanning on the same day of being diagnosed by realtime reverse-transcription polymerase chain reaction (rRT-PCR).A low-dose CT scan was performed during follow-up.Results: All the child patients had positive results.Four patients had cough and one patient had fever.One patient presented both cough and fever.Two children presented other symptoms like sore throat and stuffy nose.One child showed no clinical symptom.Five patients had positive initial CT findings with subtle lesions like ground-glass opacity (GGO) or spot-like mixed consolidation.Three patients were reported with negative results in the initial and follow-up CT examination.One patient was reported with initial negative CT findings but turning positive during the first follow-up.All patients had absorbed lesions on follow-up CT images after treatment.Conclusion: Pediatric COVID-19 patients have certain imaging and clinical features as well as disease prognosis.Children with COVID-19 tend to have normal or subtle CT findings and relatively better outcome.

Objective To verify the analytical performance of Hitachi 7600-210automatic biochemical analyzer detection system.Methods The precision, accuracy, linearity and clinical reportable range, limit of quantitative detection and anti-interference capability were validated according to Clinical and Laboratory Standards Institute (CLSI) documents (EP15-A3and EP17-A2) and Clinical Laboratory Improvement Amendment 1988 (CLIA′88) standards.Results The within precisions of high and low two concentrations were both less than1/4CLIA′88TEa (laboratory permissible total error), the day precisions were less than 1/3CLIA′88TEa, the pass rates of three external quality assessments in 2017 were all not less than 80％and range from 0.02mmol/L to 401.80mmol/L.The clinical reportable was ranged from 0.02to 401.80mmol/L with a linear relationship.The LoB, LoD and LoQ of glucose (GLU) detection were 0.01 mmol/L, 0.03 mmol/L and 0.08mmol/L respectively.The anti-interference capability to hemoglobin (Hb), vitamin C (VitC), bilirubin (BIL) and triglyceride (TG) in the detection system to GLU measurement were in accordance with the manufacturer′s statement.Conclusion Performance verification of Hitachi 7600-210automatic biochemical analyzer detection system to GLU detection is consistent with the manufacturer statement also in accordance with CLIA′88standards, which can meet the expectant use of clinical test.

OBJECTIVETo observe the effects of artificial dermis combined with basic fibroblast growth factor (bFGF) on the treatment of cicatrix and deep skin wounds.

METHODSThe clinical data of 72 patients with wounds repaired with artificial dermis, hospitalized in our unit from October 2010 to April 2015, conforming to the study criteria, were retrospectively analyzed. The types of wounds were wounds after resection of cicatrices, deep burn wounds without exposure of tendon or bone, and wounds with exposure of small area of tendon or bone, in a total number of 102. Wounds were divided into artificial dermis group (A, n=60) and artificial dermis+ bFGF group (B, n=42) according to whether or not artificial dermis combined with bFGF. In group A, after release and resection of cicatrices or thorough debridement of deep skin wounds, artificial dermis was directly grafted to wounds in the first stage operation. After complete vascularization of artificial dermis, wounds were repaired with autologous split-thickness skin grafts in the second stage operation. In group B, all the procedures were exactly the same as those in group A except that artificial dermis had been soaked in bFGF for 30 min before grafting. Operation area, complete vascularization time of artificial dermis, survival of skin grafts, and the follow-up condition of wounds in the two groups were recorded. Data were processed with t test and Fisher's exact test.

RESULTS(1) Operation areas of wounds after resection of cicatrices, deep burn wounds without exposure of tendon or bone, and wounds with exposure of small area of tendon or bone in the two groups were about the same (with t values from -1.853 to -0.200, P values above 0.05). Complete vascularization time of artificial dermis in wounds after resection of cicatrices, deep burn wounds without exposure of tendon or bone, and wounds with exposure of small area of tendon or bone in group B were respectively (15.6 ± 2.9), (14.7 ± 2.7), and (20.3 ± 4.4) d, and they were shorter by an average time of 2.7, 4.0, 7.4 d, respectively, as compared with those in corresponding types of wounds in group A [respectively (18.3 ± 4.7), (18.7 ± 4.2), and (27.7 ± 8.8) d, with t values from -2.779 to -2.383, P values below 0.05]. (2) The ratio of skin grafts with excellent survival in the three types of wounds in group B were higher than those in corresponding types of wounds in group A, but there were no statistically significant differences (with P values above 0.05). (3) Patients were followed up for 1 to 48 months, and there were no obvious cicatrices in skin graft sites and the donor sites during the following time.

CONCLUSIONSArtificial dermis combined with bFGF can effectively shorten the vascularization time of artificial dermis in wounds after resection of cicatrices and deep skin wounds.

Burns ; therapy ; Cicatrix ; therapy ; Debridement ; Dermis ; injuries ; Fibroblast Growth Factor 2 ; therapeutic use ; Humans ; Retrospective Studies ; Skin Transplantation ; Skin, Artificial ; Soft Tissue Injuries ; therapy ; Transplantation, Autologous ; Wound Healing

Anxiety disorder is one of the most common mental disorders and seriously impairs the physical and mental health of patients. Due to the efficacy of acupuncture for tranquilization, acupuncture displays its unique advantage on the treatment of anxiety disorder, but the relevant biological mechanism has not been elaborated. The modern medicine study has proved that the heart and brain have their own independent natriuretic peptide (NP) system. The dysfunction of ANP and its receptor are closely related to the occurrence of anxiety disorder. The ANP acts on anti-anxiety. Hence, focusing on the three aspects, named the anti-anxiety effect of acupuncture based on its tranquilizing effect, the anti-anxiety effect of ANP and the positive regulation of acupuncture on NP, the mechanism on ANP and its receptor was explored in anti-anxiety with acupuncture based on tranquilizing effect, and the idea was put forward on that the anti-anxiety effect of acupuncture was possibly based on its action of tranquilization through regulating the ANP and its receptor. As a result, it is expected to provide the theoretic support for the mechanism study on anti-anxiety with acupuncture based on its tranquilizing effect.
Acupuncture Therapy ; Animals ; Anti-Anxiety Agents ; metabolism ; Anxiety ; metabolism ; therapy ; Atrial Natriuretic Factor ; metabolism ; Humans ; Receptors, Atrial Natriuretic Factor ; metabolism

Objective To investigate the clinical application value of point-of-care combined detection of cTnI,MYO and CK-MB in the patients with acute myocardial infarction (AMI).Methods 74 cases of coronary syndrome were collected as the patients group,including 36 cases of AMI and 38 cases of unstable angina pectoris(UAP),and 40 individuals with healthy physical examina-tion were selected as the control group.The concentrations of cardiac marker cTnI,MYO and CK-MB in blood at different times were detected by using the point-of-care rapid immune quantitative method.Then the sensitivity and specificity for diagnosing AMI were compared for determining the best time of single detection and combined detection.Results The positive rates of cTnI,MYO and CK-MB within onset 2-12 h with the symptoms in the AMI group were higher than those in the control group and the UAP group,the difference had statistical significance (P <0.01).The combined detection of cTnI,MYO and CK-MB within onset 6-12 h with symptoms had the higher sensitivity and higher specificity for diagnosing AMI.The combined detection of cTnI and CK-MB within onset 12-24 h with symptoms could reach the optimal sensitivity and optimal specificity for the diagnosis.The sensitivity and specificity of cTnI within onset 24-72 h with symptoms for diagnosing AMI were 100.0% and 100.0% respectively.Conclu-sion The point-of-care combined detection of cTnI,MYO and CK-MB can conveniently and rapidly diagnose AMI.The sensitivty and specificity of various indexes in different time periods are different.Their combined detection can increase the diagnostic rate for AMI.