Objective To analyze the clinical manifestations,diagnosis and treatment of idiopathic left ventricular tachycardia(ILVT)in infants and young children.Methods The clinical data,including manifestations,lab results and treatments of 37 cases of ILVT in infants and young children were analyzed retrospectively.Results ILVT were seen more in young children older than 1 year old and male infants.A total of 37 cases with ILVT showed diverse clinical manifestations,5 children had cardiac insufficiency with oliguria and edema,2 children had syncope.There were 8 children without any symptoms,and 22 children had some symptoms,which mainly included agitation and crying,weakness and sweaty,vomitting and pale com-plexion.Holter showed incessant ILVT in 20 cases(54.1%),and paroxysmal in 17 cases(45.9%).Of the 37 cases,9 cases presented tachycardia-induced cardiomyopathy(TIC),8 of them were secondary to the in-cessant ILVT.Children with TIC compared with those without TIC,the ventricular rate were faster[(206.2 ± 38.7)beats/min vs.(171.8 ±38.7)beats/min,P<0.05],the duration were longer[(22.6 ± 15.3)days vs. (9.8 ±6.0)days,P<0.05].A total of 34 cases were given by antiarrhythmic drugs,verapamil was higher effective in reversion to sinus rhythm.Radiofrequency ablations were conducted in 8 cases,resulting in ven-tricular tachycardia elimination.All of children were fine during following up periods.After successful control of tachycardia,left ventricular end-diastolic diameter and left ventricular ejection fraction in patients with TIC gradually recovered[(35.4 ± 7.2 )mm vs.(28.9 ± 5.6 )mm,P <0.05;(46.7 ± 4.0 )% vs.(70.1 ± 1 .5 )%,P<0.0 1 ] .Conclusion ILVT in infants and young children are rare,and present different manifes-tions.An incessant ILVT with faster ventricular rate and longer duration are more frequently complicated by TIC.Radiofrequency ablation is the effective way of radical cure of the disease.The diagnosis and treatment for the tachycardia are particularly important in early time,and the prognosis are good.

Objective To investigate the clinical features and prognostic factors in children with idi-opathic pulmonary arterial hypertension(IPAH). Methods The data of children with IPAH diagnosed in Beijing Children′s Hospital from January 2006 to December 2015 were collected. The cases were divided into survival group and death group according to the prognosis. The risk factors influencing prognosis in children with IPAH were identified by Logistic regression analysis. Results Total 26 patients were enrolled in this study,and 17 of them survived and 9 of them were dead. IPAH was found to be more common in school-age children. The average age of the patients was(6. 6 ± 3. 6)years and the male to female ratio was 1. 17∶1. All of the children had the symptoms with decreased activity tolerance and fatigue. The incidence of syncope and dyspnea and edema of lower extremity were 34. 6%,23. 1%. Accentuated pulmonic second sound(P2) was detected in 92. 3% of patients during physical examination, which was also the most common sign. About 50. 0% patients were functional class Ⅲ-Ⅳ. Echocardiography showed that all childrens′ mean pulmonary artery systolic pressure(PASP) was(79. 0 ± 20. 3) mmHg(1 mmHg=0. 133 kPa) and 16 of them with right ventricular dilatation. Electrocardiogram with ST-T changes and right ventricular high voltage were common. The average plasma level of brain natriuretic peptide(BNP) in all cases was(870. 4 ± 720. 9) pg/ml. The single factor analysis illustrated that syncope(OR=26. 25,95%CI 3. 04 -226. 60,P=0. 003),heart func-tional class Ⅲ-Ⅳ(OR=19. 199,95%CI 1. 88 -196. 53, P=0. 0128), PASP≥70 mmHg(OR =9. 936, 95%CI 1. 81-∞,P=0. 005),BNP≥850 pg/ml(OR=59. 991,95%CI 4. 69-767. 62,P=0. 002) indica-ted the worse outcome. Conclusion IPAH in children is rare and the prognosis is poor. Syncope, cardiac function grade,PASP and the levels of BNP are the main important factors affecting the prognosis of children with IPAH. BNP has important clinical significance for the evaluation of IPAH and the prognosis of the disease.

Objective To identify the variation in the Env region of SHIV-XJ02170 during passaging in Chinese origin Rhesus Macaques.Methods Fragments of the SHIV-XJ02170 gp160 and gp120 gene were amplified by PCR and RT-PCR separately from the blood samples of SHIV-XJ02170 infected animals at the peak viral load time point.Purified RT-PCR product was ligated into T easy vector and transformed into JM109 competent cells,18 clones were selected by PCR method and sequenced by ABI 3730DNA sequencers.The gene distances(divergence,diversity)were calculated using DISTANCE.Results In all,the SHTV-XJ02170 gp120 gene evolved forward along the virus passaging.It could be found that viral divergence from the founder strain serially enhanced during in vivo passaging,but in the early phase of each passage,SHIV-XJ02170 gp120 gene evolved toward ancestral state upon transmission to a new host.All of the SHIV-XJ02170 strains had V3 loop central motif(GPGQ)and were predicted to be using CCR5 on the basis of the critical amino acids within V3 loop.Conclusion There was significant increase in the genetic distance during serial passaging,and SHIV-XJ02170 gp120 gene evolved forward along passaging.This could partly explain why the virus infectivity was enhanced during in vivo passaging.

Objective To analyze the virologic and immunologic properties during SHIV-XJ02170passage in vivo and construct the clade C SHIV/Chinese origin Rhesus macaques AIDS model . Methods SHIV-XJ02170 cell-free virus tranfected in 293T was adapted by serial passage in nine Chinese-origin Rhesus macaques. CD4/CD8 ratio was detected by flow cytometry to analyze the changes in viral pathogenicity. Real-time RT-PCR and IFN-γsecreting ELISPOT methods were used to analyze changes in characteristics of virology and immunology. Results During in vivo passage, CD4/CD8 ratio did not deeply decline. However,the peak and setpoint viral load in the line 3 show a continuous upward trend. The strong humoral and cellular immune responses were induced after SHIV-XJ02170 infection. Meanwhile, there was significant positive correlation between the viral load and binding antibody titer. Conclusion There were no pathogenic viral strains, and upward trend in virulence of SHIV-XJ02170 was found during in vivo passaging. SHIVXJ02170/Chinese origin Rhesus macaques model will play an important role in effect evaluation of candidate AIDS vaccines in China.

Objective To investigate the influence of sedentary behavior on chronic diseases of different occupational groups in Jiading District. Methods We studied the sedentary time and the morbidity of chronic illnesses among different occupational groups aged between 20 and 74 in Anting town, Huating town and Huangdu town. Results The overall prevalence of hypertension (37.88%) was greater than that of diabetes (8.64%), and the prevalence of both chronic diseases in men was greater than that in women.There was a difference in prevalence between the two types of chronic diseases in different occupational groups.The length of time the subjects sat or leaned on each day was consistent with the occupational distribution of the two chronic diseases. Conclusion The prevalence of chronic diseases among different occupational groups may be related to sedentary behavior.CDC and community should promote education and encourage sports among these occupations.

Adenocarcinoma, Mucinous ; drug therapy ; metabolism ; pathology ; surgery ; Adult ; Aged ; Breast Neoplasms ; drug therapy ; metabolism ; pathology ; surgery ; Carcinoma, Ductal, Breast ; drug therapy ; metabolism ; pathology ; surgery ; Carcinoma, Lobular ; drug therapy ; metabolism ; pathology ; surgery ; Disease-Free Survival ; Female ; Follow-Up Studies ; Humans ; Lymphatic Metastasis ; MCF-7 Cells ; metabolism ; Mastectomy, Modified Radical ; Membrane Proteins ; metabolism ; Middle Aged ; Receptor, ErbB-2 ; metabolism ; Sphingosine N-Acyltransferase ; metabolism ; Survival Rate ; Tumor Suppressor Proteins ; metabolism

The total RNA was extracted from ginseng leaves of Panax ginseng. The Cu/Zn-SOD gene was amplified via RT-PCR and the pET-28(a)-Cu/Zn-SOD expression vector was constructed. The pET-28 (a)-Cu/Zn-SOD recombinant plasmid was transformed into Escherichia coli BL21 (DE3) competent cells and was induced by IPTG in order to select optimal induction of expression conditions. The target protein was purified by the nickel ions (Ni ) affinity chromatography and the target protein enzyme activity was determinated by the xanthine oxidase method. The similarity of the Cu/Zn-SOD gene sequences and the Cu/Zn-SOD gene sequences of Korean ginseng in NCBI was 99. 00%. The target protein expression level was about 44.42%, and the molecular weight was 16.30 kDa after the pET-28(a)-Cu/Zn-SOD recombinants were induced by IPTG. The purified Cu/Zn-SOD protease activity reached 10,596.69 U x mg(-1). The P. ginseng pET-28(a)-Cu/Zn-SOD prokaryotic expression vector was built by the method of molecular biology, which provided the foundation for studying the Cu/Zn-SOD biology function.
Cloning, Molecular ; Escherichia coli ; genetics ; Gene Expression ; Genetic Engineering ; methods ; Genetic Vectors ; genetics ; Panax ; enzymology ; genetics ; Sequence Analysis ; Superoxide Dismutase ; genetics ; isolation & purification ; metabolism

Objective:To investigate the correlation between the location and volume of cerebral microbleeds (CMBs) and lacunar infarction (LI) in patients with cerebral small vessel disease (CSVD).Methods:Participants from the CSVD cohort in the Department of Neurology, Nanjing Drum Tower Hospital, the Affiliated Hospital of Medical School of Nanjing University from February 2017 to March 2019 were enrolled retrospectively. All participants underwent magnetic resonance imaging scans, standardized clinical assessment and diagnosis. AccuBrain, an automatic brain segmentation and quantification software developed by the Chinese University of Hong Kong, was used to quantitatively analyze the volume of CMBs and white matter hyperintensities (WMHs). Ordered multi-class logistic regression analysis was used to determine the independent influencing factors of LI, and then multiple linear regression analysis was used to investigate the correlation between the volume of deep or infratentorial CMBs (DI-CMBs) and the number of LI. Results:A total of 317 patients with CSVD were included in the analysis, including 214 (67.5%) in the non-LI group, 43 (13.6%) in the single LI group, and 60 (18.9%) in the multiple LI group. The comparison of the three groups showed that older age, male, smoking, drinking, history of previous stroke or transient ischemic attack (TIA), lower levels of high-density lipoprotein cholesterol, larger CMBs and WMHs volume, higher enlarged perivascular spaces (EPVS) grade might be the risk factors for LI. Ordinal multivariable logistic regression analysis showed that male (odds ratio [ OR] 2.058, 95% confidence interval [ CI] 1.084-3.909; P=0.027), previous stroke or TIA history ( OR 1.962, 95% CI 1.089-3.535; P=0.025), larger WMH volume ( OR 8.716, 95% CI 4.034-18.832; P<0.001), higher EPVS grade ( OR 1.915, 95% CI 1.292-2.839; P=0.001), larger DI-CMB volume ( OR 1.022, 95% CI 1.006-1.038; P=0.008) or more DI-CMB number ( OR 1.187, 95% CI 1.005-1.403; P=0.044) were the independent related factors of LI. Multiple linear regression analysis showed that there was a significant correlation between the volume of DI-CMB and the number of LI ( r=0.330, P<0.001). Conclusion:In patients with CSVD, there is a significant correlation between DI-CMBs and LI.

The effects of scorpion venom heat resistant protein (SVHRP) on sodium channel were studied in freshly isolated hippocampal neurons in rat using the whole-cell patch-clamp technique. The results indicated that tetrodotoxin-sensitive voltage-dependent sodium current in hippocampal neurons was inhibited by SVHRP in a dose-dependent manner. The half-inhibition concentration (IC(50)) was (0.0034+/-0.0004) microg/mL, Hill constant (n) was 0.4361+/-0.0318. After SVHRP application, a clear shift of the activation curve of Na(+) channel was shown towards more depolarized potential, resulting in channel opening at more positive membrane potentials. In the presence of 0.1 mug/mL SVHRP, the voltage for half-activation (V(1/2)) and the slope factor of the activation curve were (-23.96+/-0.41) mV and 3.73+/-0.08 (n=8, P<0.05) compared with the control recordings of (-34.38+/-0.62) mV and 4.52+/-0.52 (n=16), respectively. Averaged and normalized curve of steady-state inactivation of Na(+) channel was shifted towards negative potential after treatment of 0.1 and 0.01 mug/mL SVHRP. In the presence of 0.1 mug/mL SVHRP, the voltage for half-inactivation (V(1/2)) and the slope factor determined by a sigmoid fit of the inactivation curve were (-50.69+/-2.55) mV (n=8, P<0.01) and 5.49+/-0.72 (n=8, P<0.05) compared with the control recordings of (-32.60+/-1.52) mV and 6.73+/-0.51 (n=16), respectively. These results suggest that SVHRP blocks the voltage-dependent sodium currents and alters the sodium channel kinetics to decrease the excitability of neurons. This might be an interpretation for the antiepileptic effects of SVHRP.
Animals ; Dose-Response Relationship, Drug ; Female ; Hippocampus ; drug effects ; physiology ; In Vitro Techniques ; Male ; Patch-Clamp Techniques ; Rats ; Rats, Sprague-Dawley ; Scorpion Venoms ; pharmacology ; Sodium Channel Blockers ; pharmacology ; Tetrodotoxin ; pharmacology

The effects of scorpion venom heat resistant protein (SVHRP) (National invention patent of China, 2004-10-20, No. ZL01 1 06166.92) on the excitability of acutely isolated rat hippocampal neurons were observed by whole-cell recording and the potential molecular mechanisms underlying its antiepileptic effect were investigated further. The results showed that SVHRP could decrease the excitability of hippocampal neurons. SVHRP (1x 10(-2) microg/mL) altered the action potential (AP) firing mode and decreased the AP firing frequency. Out of 52 neurons observed, 45 (86.54%) generated phasic firing, and 7 (13.46%) generated repetitive firing. Among the 45 neurons generating phasic firing, 8 (17.78%) neurons could still be induced phasic firing after treatment with 1x 10(-2) microg/mL SVHRP and 37 (82.22%) neurons had no responses to the stimulation. The AP firing of neurons was dramatically different after treatment with SVHRP (P<0.01, n=45). Among the 7 repetitive firing neurons, all of them could only generate 1 or 0 AP instead of repetitive firing when SVHRP was applied. The number of APs was 14.57 +/- 1.00 and 0.57 +/- 0.20 before and after SVHRP treatment (P<0.01, n=7). The AP rheobase was (75.10 +/- 8.99) pA and (119.85 +/- 12.73) pA before and after 1x 10(-4) microg/mL SVHRP application, respectively (P<0.01, n=8). The AP threshold was increased from (-41.17 +/- 2.15) mV to (-32.40 +/- 1.48) mV after 1x 10(-4) microg/mL SVHRP treatment (P<0.01, n=8). The peak amplitude of AP was (68.49 +/- 2.33) mV for the neurons before treatment with 1x 10(-4) microg/mL SVHRP and (54.71 +/- 0.81) mV after treatment (P<0.01, n=8). These results showed that SVHRP could decrease the AP firing frequency, increase the AP rheobase and threshold, but decrease the AP peak amplitude of hippocampal neurons. In other words, SVHRP can decrease the excitability of hippocampal neurons. SVHRP probably alters the excitability of hippocampal neurons by affecting sodium channels and this may be one of the underlying molecular mechanisms for its antiepileptic effect.
Action Potentials ; drug effects ; physiology ; Animals ; Animals, Newborn ; Anticonvulsants ; pharmacology ; Cell Separation ; Depression, Chemical ; Hippocampus ; cytology ; Neurons ; cytology ; drug effects ; physiology ; Patch-Clamp Techniques ; Rats ; Rats, Sprague-Dawley ; Scorpion Venoms ; pharmacology