The concept of hemangioblast was proposed a century ago. The existence of hemangioblasts has been demonstrated recently in vitro by differentiation of mouse and human embryonic stem (ES) cell into em-bryoid bodies(EBs). In the developing embryo, a common progenitor, termed "hemangioblast", generates both hematopoietic and endothelial cell lineages. The in vitro differentiation of embryonic stem cells to hemangioblast is a powerful approach for studying the commitment of the hematopoietic and endothelial lineages. This review will summarize recent development in the studies on hemangioblast.

Objective To identify and characterize dietary patterns in a middle-aged Guangzhou population and study associations between these patterns and plasma lipids.Method 555 subjects(98 men and 367 women) were recruited in Guangzhou.Subjects completed a detailed health and lifestyle questionnaire and provided a fasting blood sample for plasma lipids test.Dietary intake was assessed using a food-frequency questionnaire.Dietary patterns were assessed by K-means cluster Analysis.Results Three dietary patterns were identified.In Cluster 1,the subjects took higher intakes of cereals(301.9?97.2) g/d,and the lower intakes of leafy vegetables(275.9?92.7)g/d,non-leafy vegetables(139.4?84.7) g/d,fruits(122.1?73.3) g/d,eggs(18.3?17.3) g/d and milk(50.0?93.2) ml/d.In Cluster 2,they was characterized by significantly higher intakes of dried legumes and legume products(28.5?31.1) g/d,eggs(30.2?18.3) g/d,milk(217.1?152.0) ml/d,nuts(7.0?13.9) g/d,fruits(345.0?151.8) g/d and non-leafy vegetables(280.3?153)g/d,and lower intakes of cereals(269.1?98.0) g/d.In Cluster 3,the people took higher intakes of leafy vegetables(540.6?158.3) g/d and fish(42.9?42.2) g/d,and the lower intakes of dried legumes and legume products(12.7?20.9) g/d,nuts(4.9?14.7) g/d.There were significant differences in LDL between clusters.Conclusion Dietary pattern of Cluster 2 could help to maintain plasma lipids in normal range.

The renin-angiotensin system exists locally in bone tissue.The RAS components and the active peptide angiotensinⅡ (Ang Ⅱ)within RAS are directly involved in the pathophysi-ological process of regulating bone metabolism.Ang Ⅱ exerts the effects via its receptors expressed in osteoblasts and osteoclasts. This paper reviewed the pathways of classical RAS,explained the tissue RAS-induced tissue injuries,and especially elaborated the regulation of RAS active peptide Ang Ⅱ on target genes and in-tracellular signaling pathways in osteoblasts,the action of Ang Ⅱon osteoclastic function via acting on osteoblasts,and the inter-action of Ang Ⅱ receptors involved in the modulation on bone metabolism.

The shortage of organs and cells from the donors continues to restrict allotransplantation.To carry out the xenotransplantation of pig as the donor is a very important method to alleviate the problem.At present,the organs of pigs (such as islet cells,neurons,liver ceils and cornea) have been initially used in clinical practice.However,significant barriers to be overcome before pig organ xenotransplantation can become a clinical therapy because of the immune and physiological disorders.With pigs that express one or more human thromboregulatory or anti-inflammatory genes being developed,the research of the xenotransplantation has made significant progress,the survival time is logner,at the same time,risk of cross-infection between species is smaller.However,immune rejection and physiological obstacles still prevent organ xenotransplantation from clinical application.This review will draw attention to the latest progress of the xenotransplantation,and provide some references for researchers.

To explore the anti-angiogenic effects of genistein on synovium in a rat model of type II collagen-induced arthritis (CIA).

Objective To investigate the effect and mechanism of STAT3 gene silencing on the growth of xenografts in human pancreatic cancer SW1990 cells in nude mice.Methods The expression vector inserted with shRNA targeting at STAT3 gene was constructed and was stably transfected into SW1990 cells (SW1990-RNAi group).SW1990 cells transfected with negative control shRNA expression vector (SW1990-Con group) and parent SW1990 (SW1990 group) were used as controls.STAT3,VEGF,MMP-2 protein expressions in these groups were determined by using Western blot.The subcutaneous xenografts models were established in nude mice,and the growth of xenografts was observed,CD34 expressions were determined by immunohistochemistry and MVD was measured.Results The expression of STAT3 protein was 84.69 ± 9.31,82.00 ± 7.76,7.93 ± 1.24,repectively,in SW1990 group,SW1990-Con group,SW1990-RNAi group,and the expression of VEGF protein was 82.94 ± 8.97,80.86 ± 10.28,39.04 ± 6.23,respectively,and the expression of MMP-2 protein was 40.88 ± 5.09,38.26 ± 5.71,12.54 ± 2.15,respectively.The expression in SW1990-RNAi group was significantly lower than those in other 2 groups (P ＜ 0.05),while the expression of all three proteins between SW1990-Con group and SW1990 group was not significantly different.The weight of the xenografts in SW1990 group,SW1990-Con group,SW1990-RNAi group was (2.2 ± 0.4),(2.2 ± 0.3),(0.5 ± 0.3) g,respectively ; the MVD of the xenografts was (20.35 ± 2.41),(18.79 ± 1.94),(9.62 ± 1.06) per high power field,respectively,and the number in SW1990-RNAi group was significantly lower than those in other 2 groups (P ＜ 0.05 or P ＜ 0.01),while the difference between SW1990-Con group and SW1990 group were not significant.Conclusions Inhibition of STAT3 gene expression can significantly slow the growth of SW1990 xenografts in nude mice,and the mechanism may be related with down-regulation of VEGF and MMP-2 expression and inhibition of the angiogenesis of pancreatic cancer.

The clinical data of 76 children with EFE admitted from June, 1998 to December, 2009 was retrospectively analyzed. Tachypnea、 cough and cyanosis were common and all presented with heart failure. Electrocardiogram revealed sinus tachycardia 、left ventricular hyperthrophy and ST-T alterations. On chest radiograph 54 cases (54/76) had a cardiothoracic ratio ＞ 0. 65 and 33 with pneumonia.Echocardiopraphy revealed lowered left ventricular systolic function in all cases and decreased left ventricular diastolic function in 21 (21/76). 63 cases (63/76) presented with thickened and enhanced left ventricular endocardium and 11 (11/76) with thickened interventricular septals. All were treated with digitalis. 58children were improved and discharged, 10 gave up therapy and 8 died during hospitalization. 41 out of 58 improved cases were followed for 1 - 4 years, with 2. 6 years on average. Among them 28 were clinically cured, 7 deteriorated and 6 died of heart failure. Echocardiography is of diagnostic value for ERE. Systolic and diastolic function of the heart can be used to predict the outcome. Pulmonary infection is a major risk factor associated with deterioration. Long-term treatment is imperative to improve the prognosis.

AIM: To examine COX-2 expression in esophageal carcinoma,and to study relationships between COX-2 expression and clinicopathological features and prognosis of esophageal carcinoma patients.METHODS: 89 paraffin-embedded tissue samples from patients with esophageal carcinoma were collected,its clinicopathological features such as tumour differentiation,depth of invasion,length and site of the tumor,regional lymph node metastases,distant metastasis were recorded.Survival time of 81 cases were also recorded.By SP immunohistochemistry method,the expression of COX-2 in tumor samples was examined.RESULTS: COX-2 expression in esophageal carcinoma was markedly higher than that in nomal esophagus,the expression was higher in less differentiated and deeper invaded cases(P0.05).Cases of esophageal carcinoma with lower COX-2 expression had longer survival time than those with higher COX-2 expression(P

Objective To investigate the value of ultrasound contrast in differential diagnosis of liver alveolar hydatid disease and hepatic malignant tumor.Method Totally 36 cases of liver alveolar hydatid disease and 31 cases of hepatic malignant tumor were retrospectively analyzed,who visited the Ultrasound Department of Qinghai Red Cross Hospital from March 2010 to September 2013,the performance characteristics of gray-scale ultrasound and contrast-enhanced ultrasound (CEUS) on hepatic malignant tumor and liver alveolar hydatid disease were compared.Results Gray-scale sonography of 36 liver alveolar hydatid diseases showed clear boundary,heterogeneous hypoechoic nodules,and the maximum area was (5.06 ± 2.46) cm2 in 49 lesions;gray-scale sonography of 31 hepatic malignant tumors showed unclear boundary,hypoechoic nodules,and the maximum area was (7.29 ± 5.83) cm2.CEUS of liver alveolar hydatid disease showed non-enhancement in three phases,and rim enhancement was seen synchronized with the liver parenchyma.CEUS of hepatic malignant tumor showed hyperenhancement in arterial phase,equal-enhancement or hypo-enhancement in portal phase and delayed phase,and abnormal perfusion areas were clear.Conclusion Liver alveolar hydatid disease is different in the performance of CEUS from hepatic malignant tumor,CEUS has a great value in the differential diagnosis of liver alveolar hydatid disease and hepatic malignant tumor.

Traumatic coagulopathy is a serious complication of tissue damage caused by trauma.In clinic,it easily develops into multiple system organ failure and results in high mortality.Traumatic coagulopathy is a plurality of blood coagulation disorder,its pathogenesis is extremely complex and involves tissue damage,blood coagulation,anticoagulation and fibrinolysis,inflammation and many other pathophysiological aspects.An in-depth study on the pathogenesis of traumatic coagulopathy is very important to improve clinical effect.This paper tries to do a review of recent study progress from pathophysiological mechanisms and hopes to provide reference for clinical work.