Objective To establish a RP-HPLC method for the determination of drug release in vitro of atractylenolide Ⅰ liposomes. Methods The release behavior of the drug from liposomes was studied by the third method for dissolution. ZORBAX C18 column (4.6 mm × 250 mm, 5 μm) was used with a mobile phase of Methanol-Acetonitrile-0.2% from liposomes in vitro fitted the log-normal distribution equation and had a property of sustained release. Conclusion The method is simple, fast and selective. It is suitable for the determination of release profile in vitro of atractylenolide Ⅰ liposomes.

Objective To investigate whether uninduced autologous bone-marrow mononuclear cell (ABM-MNC) could survive and differentiate into myocardial cells and endothelial cells in the infarcted heart. Methods 40 male big-ear Japanese rabbits were divided into two groups randomly: the transplanted group (n=20) and the control group (n=20). The model of acute myocardial infarction was made by left anterior descending artery ligation, which was confirmed by ECG. The cardiac function was evaluated by the echocardiography. 7 days later, BrdU labeled ABM-MNCs were injected into infarcted and marginal area myocardium in the transplanted group, while the control rabbits were injected with saline. 6 weeks later, the hearts were harvested for histology and immunohistochemistry evaluation. Results In the transplanted group, viable cells labeled with BrdU could be identified in the infarcted area, and myocytes and endothelial cells labeled with BrdU can also be found in the border area, these cells demonstrate myogenic differentiation with the expression of α-Actin by immunostaining. Moreover, the vessel density of the transplanted group in the borders of the infarction was higher than the control group (P＜0. 05), but there was no difference in the infarcted areas between two groups (P＞0.05). At the 6 weeks after experiment, the cardiac function was improved in both groups, but the transplanted group improved more than that in the control group (P＜0.05). Conclusion Autologous bone-marrow mononuclear cells injected into the infarcted myocardium could survive in both the infarcted and the border areas, differentiated into endothelial cells and other cells which have obtained the characters of myocytes, and increase the vessel density in border area, improved the cardiac function.

Objective To investigate whether uninduced autologous bone-marrow mononuclear cell (ABM-MNC) could survive and differentiate into myocardial cells and endothelial cells in the infarcted heart. Methods 40 male big-ear Japanese rabbits were divided into two groups randomly: the transplanted group (n=20) and the control group (n=20). The model of acute myocardial infarction was made by left anterior descending artery ligation, which was confirmed by ECG. The cardiac function was evaluated by the echocardiography. 7 days later, BrdU labeled ABM-MNCs were injected into infarcted and marginal area myocardium in the transplanted group, while the control rabbits were injected with saline. 6 weeks later, the hearts were harvested for histology and immunohistochemistry evaluation. Results In the transplanted group, viable cells labeled with BrdU could be identified in the infarcted area, and myocytes and endothelial cells labeled with BrdU can also be found in the border area, these cells demonstrate myogenic differentiation with the expression of α-Actin by immunostaining. Moreover, the vessel density of the transplanted group in the borders of the infarction was higher than the control group (P<0.05), but there was no difference in the infarcted areas between two groups (P>0.05). At the 6 weeks after experiment, the cardiac function was improved in both groups, but the transplanted group improved more than that in the control group (P<0.05). Conclusion Autologous bone-marrow mononuclear cells injected into the infarcted myocardium could survive in both the infarcted and the border areas, differentiated into endothelial cells and other cells which have obtained the characters of myocytes, and increase the vessel density in border area, improved the cardiac function.

BACKGROUND: Vascular injuries to the extremities are frequently concomitant with vascular defects. Vascular transplantation repair can induce infection and vascular occlusion, etc.OBJECTIVE: To analyze the outcome of vascular reconstitution in 44 patients with vascular injuries of the extremities undergoing vascular transplantation.DESIGN: A retrospective case analysis.SETTING: Department of Vascular Surgery and Department of Orthopaedics of Hospital Affiliated to Jinhua College of Profession and Technology.PARTICIPANTS: Forty-four patients with vascular injuries to the extremities undergoing autologous and artificial vascular transplantation were selected at the Department of Vascular Surgery and Department of Orthopaedics of Hospital Affiliated to Jinhua College of Profession and Technology from April 1994 to October 2003. There were 29 patients with open injury and 15 patients with closed injury.METHODS: A total of 52 blood vessels were transplanted into 44 patients, including 42 blood vessels in autologous vein transplantation (35 blood vessels in great saphenous vein transplantation by end-to-end anastomosis, 5 blood vessels in small saphenous vein transplantation by end-to-end anastomosis and 2 blood vessels in superficial femoral vein and popliteal vein transplantation) and 10 blood vessels in artificial and trimming vascular transplantation by interrupted suture technique in end-to-end anastomosis.MAIN OUTCOME MEASURES: Outcomes of autologous and artificial vascular transplantation.RESULTS: Three patients received amputated extremity. Six patients developed ischemic contracture. Seven patients developed imperfect recovery of nerve function. In other patients, blood flow in the graft was satisfactory, and there was good condition of blood circulation at the distal extremities.CONCLUSION: Autologous vein is the first choice in vascular transplantation, and prosthetic material is another choice when necessary. It is important to prevent the occurrence of complication after transplantation such as vascular infection.

Objective To evaluate the value of non invasive examinations in the diagnosis of vascular disease of lower extremity. Methods Segmental systemic pressure (SEG), pulse volume recorder (PVR) and continuous wave (CW) were adopted to examination of 36 patients with arterosclerosis obliterans of lower limbs, and the foundings were compared with that of MRA and operation . Results In all 36 cases, non invasive examinations detected abdominal aorta and common iliac artery with femoral artery occlusion in 12 cases ,femoropoplitea artery occlusion in 28 cases, popliteal artery and the distal artery occlusion in 16 case; MRA together with operation confirmed abdominal aorta and common iliac artery with femoral artery occlusion in 11 cases, femoropopliteal artery occlusion in 32 cases and popliteal artery and the distal artery occlusion in 13 cases. The accurent diagnosis rate of non invasive examination was 85.7%. Conclusions Although PVR has not yet been used to replace the arteriography to directly observe the local situation of arterial lesions , it can preliminarily determine the obstruction sites and severe degree of the occluded arteries. PVR has convenient and reliability in the diagnosis,evaluation of the therapeutic effect and the postoperative follow up of blood vessel diseases,it is worthy to be widely applied in the clinical practice.

Objective To prepare polypeptide nerve growth factor (NGF) thermosentitive gel and observe drug release in vitro,in order to provide scientific information for biopharmaceuticals delivery system design aiming to treat the inner disease.Methods The thermosensitive in situ gel was prepared with NGF as main component and Pluronic F127 as the gel matrixes.The effect of concentration of gel matrix PF127 on lower critical solution temperature(LCST) were investigated.In vitro release kinetic studies were performed using membraneless dissolution method and reversed-phase high performance liquid chromatography (HPLC) method was adopted to determine NGF content in the dissolution medium.Results The average LCST of NGF-loaded gel prepared by different concentration of PF127 was 28.48-36.26℃ and the gels had good stability.The in vitro release kinetics was well characterized by sustained release and can be fitted by zero order kinetics.The in vitro accumulated release ratio of NGF in the thermosensitive gel reached to above 95％.hβ-NGF loaded in higher PF127 gel resulted in a more sustained release of hβ-NGF from the thermosensitive gel.Conclusion Well-prepared NGF thermosensitive gel is a promising inner ear-oriented drug delivery system for treating deafness and deserves to further development.

Objective To optimize the prescription and preparation technclogy of ligustilide liposomes. Methods Ligustilide liposomes were prepared by ethanol injection method. The encapsulation efficiency was taken as inspection target and the preparation of liposomes was optimized by orthogonal design. HPLC was used to measure the encapsulation efficiency. Results The best prescription was ligustilide-lecithin (1:10),lecithin-cholesterol (2:1),the water phosphate buffer solution (pH 7.5),the hydration temperature was 35 ℃. Conclusion The optimized formulation of ligustilide is reasonable in prescription and practicable in technology.

OBJECTIVE To investigate the distribution and drug resistance of nosocomial infection pathogens.METHODS The data of pathogen′s origin and antibacterial resistance of Intensive Care Unit(ICU) inpatients from Apr 2008 to Mar 2009 in a Hospital were analyzed.RESULTS There were 226 strains pathogens isolated from 116 nosocomial infection cases,from which the Gram-negative bacteria were predominate(63.27%).The resistance rates of Acinetobacter baumannii was the highest in Gram-negative bacteria,more than 70% isolates resistant to almost antibacterial.The main Gram-positive bacteria were Staphylococcus aureus,and the rate of meticillin-resistant S.aureus(MRSA) was 41.3%.All S.aureus were sensitive to vancomycin and Linezolid.CONCLUSIONS To control the antibacterial resistance of pathogens and decrease the nosocomial infection,it is important to strengthen the appropriate use of antibiotics.

The plant resources, distribution, extraction, pharmacological effects and its application in medicine of flavonoids procyanidins were reviewed based on the literature, in order to provide the basis for further application and comprehensive development.