Pulmonary hypertension(PH) is a clinical hemodynamic syndrome characterized by elevation of pulmonary artery pressure and pulmonary vascular resistance,which was presumed mainly due to pulmonary vasoconstriction,remodeling of the pulmonary vessel wall,and thrombosis in situ.Endothelin,nitric oxide,and prostacyclin pathway were three major pathways involved in the pathogenesis.Current therapies interfered with these 3 pathways in combination with conventional measures have prolonged length of life of patients and improved their quality of life significantly.

Angiogenesis Inducing Agents ; metabolism ; Angiogenesis Inhibitors ; therapeutic use ; Animals ; Antibodies, Monoclonal ; therapeutic use ; Antibodies, Monoclonal, Humanized ; Antineoplastic Agents ; therapeutic use ; Bevacizumab ; Drug Delivery Systems ; Endostatins ; therapeutic use ; Humans ; Neoplasms ; drug therapy ; Neovascularization, Pathologic ; drug therapy ; Receptors, Vascular Endothelial Growth Factor ; metabolism ; physiology ; Vascular Endothelial Growth Factors ; metabolism ; physiology

Objective To study the value of time intensity curve of contrast enhanced ultrasound in the discrimination of benign and malignant soft tissue tumors. Methods Thirty-seven cases of soft tissue tumors were carried out contrast-enhanced ultrasound examination. The region of interest in the dynamic images were chosen to carry out Gamma-Variate curve fitting through Q-LAB software and made a quantitative analysis. Then they were compared with pathological diagnosis to analyze the ultrasound imaging performance of benign and malignant tumors and their characteristics of micro-irrigation. Results Thirty-seven cases of soft tissue tumors were pathologically diagnosed 21 cases of benign and malignant in 16 cases. The perfusion of benign tumors were mainly uniformity (19/21) or potentialization (2/21). The perfusion of malignant tumors were mainly uniformity (10/16) or nonuniformity (6/16). There were no significant differences in time to peak(TTP) and arrival time of contrast agent(AT) between benign and malignant tumors( P ＞0.05). The upslope rate(A) and the derived peak intensity(DPI) in benign group were significantly less than malignant group ( P ＜0.05). Conclusions Time-intensity curve analysis of contrast-enhanced ultrasound showed that benign and malignant soft tissue tumors were different in perfusion,and it will be of a certain value for the clinical differential diagnosis.

BACKGROUND: Many scholars have paid attentions on neural stem cells (NSCs), which are regarded as the cell source to repair the injured nervous tissues. And it is becoming a key point that NSCs will be obtained in an effective way.OBJECTIVE: To observe the characteristics of isolation, proliferation and differentiation of in vitro NSCs from subventricular zone (SVZ) and hippocampus of neonatal rats.DESIGN: Single-sample trial.SETTING: Department of Neurosurgery in the Third Affiliated Hospital of Sun Yat-sen University.MATERIALS: Ten SD rats aged 3 days, of either gender, were offered from the Experimental Animal Center of Sun Yat-sen University. Nestin antibody (rabbit-anti-rat), neurofilament (NF-200) antibody (rabbit-anti-rat), and glial fibrillary acidic protein (GFAP) antibody (mice-anti-rat) were all purchased from Sigma Company.METHODS: The experiment was carried out in the Laboratory of Histology and Embryology, Basic Medical College of Sun Yat-sen University from September to December in 2006. According to the ethical requirement, the serum-free DMEM/F12 medium containing basic fibroblast growth factor and epidermal growth factor was utilized to isolate and incubate NSCs from SVZ and hippocampus of neonatal rats. Then the proliferation and differentiation of NSCs in vitro were observed.MAIN OUTCOME MEASURES: Fluorescence immunocytochemistry was applied to detect the antigen of nestin expressed from NSCs, NF expressed from neuron cells and GFAP expressed from astrocytes. The differentiation of NSCs was identified.RESULTS: The cells isolated from SVZ and hippocampus of neonatal rats possessed the ability of proliferation and self-renewal. Through inverted microscope, nestin positive cells could be found in the cell clone sphere at passage 20 of cells. Cells induced to differentiate could express antigen of NF and GFAP by the attached cell clone sphere.CONCLUSION: The NSCs successfully isolated from SVZ and hippocampi of neonatal rats possess the ability of self-renewal, proliferation, and differentiation into neuron-like cells and astrocytes.

Objective To investigate the influence of different intervention models on autism spectrum disorder (ASD) children. Methods Eighty-eight children aged from 12-46 months and newly diagnosed ASD were randomly assigned to different intervention models, including standard intervention group (T1, n=55), non-standard intervention group (T2, n=11), and family intervention group (T3, n=22). The intervention data was recorded including time and methods. Chinese revised version of Psycho-Educational Profile (C-PEP) and social adaptive behavior scale were used to test the development quota?tion (DQ) before and after intervention. Results There were significant statistical differences in C-PEP scale and pathologi?cal score before and after intervention in T1 group (P<0.01). There were significant differences in the pathological score, in?terpersonal and cooperative behaviors, sensory patterns and language barriers after intervention in T2 group (P<0.05). And there were no significant changes in the developmental quotient. The perception, gross motor, cognitive performance and the developmental quotient of oral cognition were significantly reduced after the intervention in T3 group (P<0.05). There was no significant change in pathology score. Results showed that there were significant differences in the imitation, perception, cognitive performance, oral cognition and general development before and after the intervention between three groups ( P<0.05). Conclusion A significant effect is found in children with autism spectrum disorder after standard intervention.

Objective To investigate the changes of thyroid hormones in patients with peripartum car-diomyopathy. Methods Seventy-two patients with peripartum cardiomyopathy were consecutively enrolled and 72 healthy women who had normal delivery were regarded as control. Among all the subjects , free triiodothyronine (FT3), free thyroxine (FT4) and thyroid-stimulating hormone (TSH) in the serum and high sensitive C-reactive protein (hs-CRP), interferon-gamma (IFN-γ) and interleukin-4 (IL-4) in the plasma were measured. Results The levels of serum FT3 and FT4 in peripartum cardiomyopathy group were significantly higher than those in control group (P < 0.05). And the level of serum TSH in peripartum cardiomyopathy group was significantly low-er than that in control group (P < 0.05). There were 24 cases with hyperthyroidism in peripartum cardiomyopa-thy group while no patient in the control group had hyperthyroidism (P < 0.05). The levels of plasma hs-CRP and IFN-γ in peripartum cardiomyopathy group were significantly higher than those in the control group (P <0.05). And the level of IL-4 in peripartum cardiomyopathy group was significantly lower than that in the control group (P < 0.05). Conclusions Serum thyroid hormones elevated in patients with peripartum cardiomyopathy and its mechanism might be related to abnormal immune reaction.

Objective:To explore the clinical characteristics of patients with pituitary thyrotropin-secreting adenoma and evaluate the effect of preoperative short-acting octreotide treatment on hyperthyroidism.Methods:A retrospective analysis was performed in 40 patients with pituitary thyrotropin adenoma diagnosed in Beijing Tiantan Hospital from January 2008 to January 2018. The general data, laboratory examinations and imaging findings were reviewed and analyzed. The clinical effect of preoperative octreotide on hyperthyroidism was evaluated.Results:The age of onset year of the 40 patients (male: female = 24∶16) was (30.5±5.1) years. Among them, 35 patients (87.5%) were with macroadenoma. The most common symptoms were thyroid hypermetabolism syndrome, followed by headache, dizziness, visual field damage and hypogonadism. The thyroid function of 30 patients (75%) recovered to normal within 3-5 days after the octreotide treatment. The total effective rate of the octreotide was 90.0%. The level of free thyroxine (FT 4) before treatment in patients with more than 10 times of effective cumulative dose was significantly higher than that in patients with less than 10 doses. Conclusions:Thyroid hypermetabolism syndrome and pituitary occupying effect are the most common clinical manifestations of thyrotropin-secreting adenoma. Preoperative octreotide treatment can effectively control hyperthyroidism. The level of FT 4 is a crucial factor affecting the efficacy of octreotide.

Eleven type 1 diabetic patients who received fixed regime of insulin Glargine were included in the study.The levels of fasting serum insulin were measured for each subject at 6:00 in three consecutive mornings.The variability of mean fasting serum insulin in each subject was 3.3%-41.5% (mean 15.4%).The variability did not correlate with the dose of Glargine statistically.

The specific fragment of Pneumococcal surface protein A(PspA)and Pneumococcal Surface Adhesin A(PsaA)gene was amplified by PCR from Streptococcus pneumonia 5 and Streptococcus pneumonia 19.The amplified fragnent of PspA and PsaA gene was ligated into pET-27b(+)vector and transformed into BL 21 E.coli for expression and obtain the expressive production of PspA and PsaA.Induced by IPTG,the expression level was as high as 75 % of the total disolube protein.The result showed that the recombinant plasmid could express a specific 75 kDa and 37 kDa fusion protein in E.coli BL 21,which showed the good immunogenicity and a broadly cross reactivity with the other serotypes.