Objective:To study the biological effects of TCR on hepatoma cells by transfecting V?7 into lymphocytes.Methods:TCR V?7 gene was amplified by RT PCR and cloned to expression vector pLXSN. The recombinant was transferred into lymphocytes by Lipofectin Reagent transfection, then the lymphocytes were co cultured with hepatoma cells. The phenotype of lymphocytes was detected on the Flow Cytometry, the expression of TCR V?7.1 gene was detected by Laser Scanning Confocal Microscope ( LSCM) and the ultrastructure of the hepatoma cells was showed by electronic microscope.Results:The amount of the transmembrane protein expressed by TCR V?7.1 gene was increased significantly, and so was the amount of lymphocytes (P

BACKGROUND:Early detection and accurate staging diagnosis of heart failure are the basis of good clinical therapy efficacy. Due to lack of simple and effective staging model for the diagnosis of heart failure, it is difficult to diagnose heart failure in clinics, leading to poor control of heart failure. OBJECTIVE:To establish the disease staging model based on Adaboost and SVM for heart failure, and improve the accuracy of diagnosis and staging of heart failure. METHODS:A total of 194 cases were roled into this study, including heart failure patients and healthy physical examination persons. According to the stage standards formulated by American Colege of Cardiology and American Heart Association, specific clinical feature parameters closely related to heart failure were colected and selected. Based on clinical diagnosis results and using Adaboost model and SVM model, we trained the models for heart failure diagnosis and staging, thus obtaining diagnosis model. RESULTS AND CONCLUSION: The parameters included stroke volume, cardiac output, left ventricular ejection fraction, left atrial diameter, left ventricular internal diameter at end-systole, N-terminal pro-brain natriuretic peptide and heart rate variability. As for the Adaboost model, its sensitivity and specificity was 100% and 94.4%, respectively. At the same time the SVM model had good sensitivity and specificity, 86.5% and 89.4% respectively. Adaboost classification model can be accurate in the diagnosis of heart failure symptoms, the accuracy reached 89.36%. On the basis of the diagnosis of heart failure, the SVM classification model is effective in staging the severity of heart failure, staging accuracy for staging B and C was 86.49% and 81.48%, respectively. The findings indicate that, combining Adaboost and SVM machine learning models could provide an accurate diagnosis and staging model for heart failure.

Objective To study the radiation dose distribution in the X-ray room,and provide the strategy of radiation protection for the medical staff and the patient’s nursing who had to enter the room while the X-ray was exposing.Methods The thermolumi-nescent dosemeters(TLDs)was placed around the center of the X-ray tube with the same level of the bed.Then,exposure parame-ters,including the X-ray tube voltage value and the field of view,were changed for different groups while exposing.All of the TLDs were taken back to the lab for analysis.Results The differences between the two groups which had the same distance in different di-rections were statistically significant (P <0.01).With the same radiographic condition and direction,the radiation dose on the site of 10 cm from X-ray tube center was the maximum,while the site of 120 cm was the minimum.With the same radiographic condition and distance,the radiation dose on the anode side of the X-ray tube in the room was relative lower,while the site behind the X-ray tube was relative higher.With the same voltage value,distance and direction,the same sites that had the smaller FOV(34 cm×34 cm) received lower radiation dose than those with larger FOV(52.6 cm× 52.6 cm).Meanwhile,the sites with the voltage of 70 kV re-ceived the lower radiation dose than that with the voltage value of 120 kV.Conclusion In the X-ray room,the medical staff and the patient’s nursing can choose the area on the right side(anode side),keep far away from the X-ray tube center,avoid the rear of the X-ray tube and the cathodic direction of the X-ray tube to reduce the radiation dose.

OBJECTIVETo explore the relationship between Alzheimer's disease and its family history of the patients.

METHODSStratified analyses and logistic regression analysis were used to examine the association between Alzheimer's disease and its family history exposure in 127 cases and 254 matched controls from a population-based case-control study.

RESULTSThe risk of Alzheimer's disease was significantly higher in those who had at least one first-degree relative with dementia or major psychosis as compared to those who had no dementia or major relatives with psychosis (OR = 6.25; 8.33). Adjusted for age and level of education, family history of dementia was still associated with Alzheimer's disease positively (OR = 2.07).

CONCLUSIONThis study provides evidence that familial aggregation of Alzheimer's disease might exist among people living Beijing.

Adult ; Aged ; Aged, 80 and over ; Alzheimer Disease ; genetics ; Case-Control Studies ; China ; Dementia ; genetics ; Family Health ; Female ; Humans ; Male ; Middle Aged ; Psychotic Disorders ; genetics

The 29th International Symposium on Amyotrophic Lateral Sclerosis (ALS)?Motor Neuron Disease was held in Glasgow from December 7 to 9, 2018. The symposium was divided into 23 topics, with 109 special reports and paper′s exchange and 515 posters exchange. This article briefly introduces some topics of the symposium, involving basic researches, clinical researches and clinical trials. Among these, basic researches include genetics and genomics, axonal degeneration, disease models, and preclinical therapeutic strategies; Clinical researches include epidemiology, clinical progression, cognitive and psychological change, neuropathology, neurophysiology, neuroimaging and biomarkers.

Objective:To observe the efficacy of different doses of atorvastatin on the early cardiorenal syndrome caused by chronic heart failure .Methods:A total of 90 patients with early cardiorenal syndrome caused by chronic heart failure were ran‐domly divided into conventional treatment group(group A) ,atorvastatin 20 mg group(group B) and atorvastatin 40 mg group (group C) ,with 30 patients in each group .The patients in group A received therapy of conventional anti‐heart failure agent ,the patients in group B and group C orally received atorvastatin 20 mg/d ,40 mg/d respectively ,based on the therapy of conventional anti‐heart failure agent .Serum creatinine(Scr) and glomerular filtration rate(GFR) ,left ventricular ejection fraction(LVEF) and high sensitivity C‐reactive protein(hs‐CRP) of patients in the three groups ,were detected ,before the treatment ,after 3 months of treatment ,and after 6 months of treatment .And the data were compared among the groups .Results:After 3 months or 6 months of treatment ,levels of LVEF in 3 groups were higher than that before treatment(P<0 .05 ,0 .01) .There was no significant difference among the 3 groups(P>0 .05) .There was no significant difference between the levels of Scr and GFR in group A or group B after 3 months of treatment and those before treatment(P>0 .05) .The levels of Scr and GFR in group C after 3 months of treatment were improved ,while compared with those before treatment ,and the differences showed statistical‐ly significant (P<0 .05) .There was no significant difference among the 3 groups(P>0 .05) .There was no significant differ‐ence between the levels of Scr and GFR in group A After 6 months of treatment and that before treatment(P>0 .05) .The levels of Scr ,GFR in group B and group C significantly improved after 3 months of treatment ,while compared with those before treat‐ment(P<0 .01) .The levels of Scr and GFR in group C after 6 months of treatment ,improved significantly ,while compared with that after 3 months of treatment(P<0 .01) .The levels of Scr in group B and group C were significantly different from that in group A ,after 6 months of treatment (P<0 .05 ,0 .01) ,while the level of Scr in group C was significantly different from that in group B(P<0 .05)and the level of GFR in group C was significantly different from that in group A(P<0 .05) .There was no significant difference between the levels of hs‐CRP in group A before the treatment and after treatment(P> 0 .05) .After 3 months and 6 months of treatment ,the levels of hs‐CRP in group B and group C ,were significantly different from that before treatment(P<0 .01) .After 6 months of treatment ,the level of hs‐CRP in group C ,was significantly different from that after 3 months of treatment(P<0 .01) .After 6 months of treatment ,the levels of hs‐CRP in group B and group C were significantly different from that in group A(P<0 .05 ,0 .01) ,meanwhile there was significant difference between the levels of hs‐CRP in group B and that in group C(P<0 .05) .Conclusions:On the basis of conventional therapy ,atorvastatin could improve the renal function significantly .Its mechanism may be related to the ability of atorvastatin in controlling the inflammatory reaction .The renal function protection of atorvastatin is related to the dose .

Objective: To explore the network structure of eating behaviors with anxiety, depression and perceived stress in adolescents, so as to provide a basis for effective prevention and intervention of eating behavior problems and negative emotions in adolescents. Methods: Based on the Psychology and Behavior Investigation of Chinese Residents (2021) database, the study was conducted among 3 087 adolescents. Sakata Eating Behavior Scale Short From(EBS-SF) was used to investigate their eating behaviors. The Patient Health Questionnaire-9(PHQ-9), Generalized Anxiety Disorder Scale-7 Item(GAD-7), and Perceived Stress Questionnaire-3 Item (PSQ-3) were used to evaluate their depression, anxiety and perceived stress. Network analysis method was applied to construct a network of eating behaviors and negative emotional symptoms among adolescents, so as to evaluate the centrality, bridge strength, stability and accuracy of each item. Results: The total scores of eating behaviors, depression,anxiety and stress perception in adolescents were 17.41±4.53,6.95±6.08,4.86±5.03,9.34±3.80,respectively. The symptom with the highest intensity and expected impact was "I am only satisfied when I buy more food than I need", with a node intensity and expected impact value of 4.37. The nodes Depression and Anxiety were the most closely connected(weight=0.87). There were no statistically significant differences in the network structure( M =0.13,0.11) and network connection strength(female and male:4.16,4.06, s =0.10;urban and rural areas:4.08,4.07, s =0.01) between different sexes and residents ( P >0.05). Conclusion The negative impact of comorbidities such as anxiety, depression, perceived stress and eating behaviors among adolescents can be reduced through targeted prevention and intervention of core symptoms and bridging symptoms.

Objective To evaluate the safety and efficacy of botulinum toxin type A for injection in the treatment of post-stroke upper limb spasticity (dosage was 200 U,or 240 U if combined with thumb spasticity).Methods The study was a multi-center,stratified block randomized,double-blind,placebocontrolled trial.All the qualificd subjects were from 15 clinical centers from September 2014 to February 2016.They were randomized (2∶1) to injections of botulinum toxin type A made in China (200-240 U;n =118) or placebo (n =60) in pivotal phase after informed consent signed.The study was divided into two stages.The pivotal trial phase included a one-week screening,12-week double-blind treatment,followed by an expanded phase which included six-week open-label treatment.The tone of the wrist,finger,thumb flexors was assessed at baseline and at weeks 0,1,4,6,8,12,16 and 18 using Modified Ashworth Scale (MAS),disability in activities of daily living was rated using the Disability Assessment Scale and impaction on pain,muscle tone and deformity was assessed using the Global Assessment Scale.The primary endpoint was the score difference between botulinum toxin type A and placebo groups in the tone of the wrist flexor using MAS at six weeks compared to baseline.Results Muscle tone MAS score in the wrist flexor of botulinum toxin type A and placebo groups at six weeks changed-1.00 (-2.00,-1.00) and 0.00 (-0.50,0.00) respectively from baseline.Botulinum toxin type A was significantly superior to placebo for the primary endpoint (Z =6.618,P ＜ 0.01).The safety measurement showed 10 subjects who received botulinum toxin type A had 13 adverse reactions,with an incidence of 8.47％ (10/118),and three subjects who received placebo had three adverse reactions,with an incidence of 5.00％ (3/60) during the pivotal trial phase.All adverse reactions were mild to moderate,none serious.There was no significant difference in adverse reactions incidence between the botulinum toxin type A and the placebo groups.During the expanded phase three subjects had four adverse reactions and the incidence was 1.95％.All adverse reactions were mild,none serious.Conclusion Botulinum toxin type A was found to be safe and efficacious for the treatment of post-stroke upper limb spasticity.Clinical Trial Registration:China Drug Trials,CTR20131191

The 30th International Symposium on Amyotrophic Lateral Sclerosis-Motor Neuron Disease was held in Perth, Australia from December 4 to 6, 2019. This article mainly introduces the clinical research of this meeting, including epidemiology, non-motor symptoms, auxiliary examinations and biomarkers, etc., while the basic research includes genomics and genetics, protein metabolism abnormalities, neuroimmunity and inflammation, synapse pathology and preclinical treatment strategies,

Objective To observe the effectiveness of ultrasound wide beam(WB)-based harmonic motion imaging(HMI)(WB-HMI)for locating irradiation focus of high intensity focused ultrasound(HIFU)for in vitro tissue.Methods WB-HMI technology was developed with acoustic radiation force and ultrasound imaging as the key technology.For in vitro porcine tenderloin and bovine liver tissue,different amplitude modulation(AM)frequencies(25-100 Hz)and excitation acoustic power(0.7-28 W)were used to achieve WB-HMI localization of HIFU irradiation focus,and the differences of WB-HMI localization of HIFU irradiation focus under different parameter combinations were observed.Taken the actual focus position on ultrasonic image after HIFU as the standard and the focus positioning error＜1 mm as the effective standard of WB-HMI locating irradiation focus,the locating success rate was calculated.Results The larger the acoustic power,the larger the displacement amplitude of irradiation focus by WB-HMI at the same AM frequency,while the smaller the AM frequency,the larger the displacement amplitude of irradiation focus located by WB-HMI under the same acoustic power.Under different AM frequencies,for in vitro porcine tenderloin,the success rate of WB-HMI for locating HIFU radiation focus was higher than 90.00％when acoustic power was 15 W or 22 W,whereas the success rate showed a decreasing trend when the acoustic power was 28 W.For in vitro bovine liver tissue,the success rate of WB-HMI localization was 100％when acoustic power was ≥7.0 W.Conclusion WB-HMI could be used to effectively locate HIFU irradiation focus for isolated tissue.