Objective To explore the acute effects of nickel in air PM2.5 on the cardiovascular system of rats.Methods The air PM2.5 of nickel-contaminated area and control area were collected and determined for some major metal elements.42 male Wistar rats were randomly divided into 10 groups,6 rats in each,the rats were instilled through trachea with saline,PM2.5 suspension of nickel-contaminated area and the control area respectively,at different doses(low,moderate and high dose).24 hours later,all the rats were killed for the determination of sVCAM-1 in the blood and MCP-1 in the myocardial tissue.Results The concentration of nickel in the air PM2.5 of nickel-contaminated area was found to be about 50 times higher than that in the control area.A good dose-response relationship was found in MCP-1 determination of the heart tissue in nickel-contaminated groups,and there were significant differences between nickel-contaminated area group and other groups(P﹤0.05).As for the sVCAM-1 in the serum,it was significant higher in the nickel-contaminated group and control group than the saline control group(P﹤0.05).Among the groups of nickel-contaminated area and control area,significant differences were found between the moderate and high dose groups.Conclusion The air PM2.5 from nickel-contaminated area has an obvious effect on the MCP-1 and sVCAM-1 of rats,the nickel in the air PM2.5 is likely the main contributing factor.

Objective To study the diagnostic and monitoring values of the loss of heteroxygosity(LOH) of 3p loci in free plasma DNA of small cell lung cancer. Methods PCR silver staining was used for the detection of LOH of three microsatellite sites in the 3p loci of plasma free DNA and tissue of SCLC. Results In 33 cases of tissue, the incidence rate of LOH was 54.5%(18/33), but the positive rate of LOH in plasma free DNA was 42.4%(14/33). The correlation between them was 78.8%(14/18). Conclusion The plasma free DNA in patients with lung cancer is primarily originated from the tumor tissue. LOH of plasma free DNA may be valuable molecular markers in the diagnosis of SCLC.

Objective To study the diagnostic value of LOH and MSI of free DNA 3p microsatellite point in plasma of lung cancer patients. Methods Using PCR and sliver dye techniques, LOH and MSI of three microsatellite sites of plasma DNA on chromosome 3p in resected fresh tissue from 37 patients and whole blood sample from 94 patients were detected. Results The plasma free DNA concentration of most lung cancer patients was above microgramme level. Above 70% of tissues and plasma were positive. No significant difference was found at different stages and in different pathologic types. The result of patients with lymph node metastasis was significantly different from that of the patients without lymph node metastasis. Conclusion Plasma DNA of lung cancer patients is a good medium for gene diagnosis and may be used widely in the future.

This paper presents the preliminary design of data acquisition system of a portable uroflowmeter. The system uses double-hole cantilever pressure sensor. The signal is transferred to ATmega644PA microprogrammed control unit (MCU), converted by A/D (analog to digital) convertor. Then the further data are processed and get the corresponding relationship of weight-time and two curves of urine flow and urinary flow rate. In the measurement accuracy of the device about urine flow, two factors about the placement and height of the data acquisition are analyzed to show the accuracy of the equipment through the Origin 8.0 data analysis software. The design is characterized by low cost and high speed of data collection, real-time, high accuracy.
Data Collection ; Flowmeters ; Humans ; Monitoring, Ambulatory ; instrumentation ; Software ; Urination ; physiology ; Urodynamics ; physiology

The flushing pump which is applied to clean operative wound has no temperature controlling function up to now, and doctors have to prepare the flushing fluid that has previously been warmed. The flushing pump system with medical constant temperature designed in our laboratory can absorb flushing fluid at the room temperature, and then eject flushing fluid with the temperature in accordance with the requirements of operations at a controlled constant flow rate. The system combines flow rate control with temperature control functions. The flushing pump system includes flushing part, temperature controlling part, key inputting part, liquid crystal displaying part and exceptional situation monitoring part. The present paper introduces the design method and principle of each part of the system at first, and then gives the debug method of all the system parameters. Finally the paper discusses the performance of the system according to the result of the experiment.
Equipment Design ; Equipment and Supplies ; Temperature

Adult ; Datura metel ; poisoning ; Foodborne Diseases ; therapy ; Humans ; Male ; Middle Aged ; Young Adult

Objectives To explore the calcium signaling mechanism of STIM1 in breast cancer cells. Meth-ods After SiRNA interruption, Western blot and Transwell were used to measure protein expression of STIM1 and cell migration in MDA-MB-231 cells respectively. The relationship between STIM1 and SOCE calcium signaling were analysed by Laser confocal microscopy. Western blots were used to measure protein expression of FAK after si-lence STIM1. Results The numbers of cells without STIM1 were significantly lower than those cells with STIM1 by Transwell assay. STIM1 mediated SOCE in MDA-MB-231. Blocking SOCE might inhibite cells migration. Si-lence STIM1 did not affect the expression or activation of FAK in MDA-MB-231 cells. Conclusion STIM1 influ-ences cell migration through SOCE pathway in breast cancer cells, which is independent on the expression or activa-tion of FAK.

Objective To preliminarily evaluate the safety and efficacy of percutaneous vertebroplasty (PVP) with 131I-loaded bone cement in treating vertebral tumor in rabbit models. Methods Twelve New Zealand white rabbits with lumbar vertebral tumor, which was established by puncturing transplant of VX2 carcinoma, were randomly and equally divided into the study group and the control group with 6 rabbits in each group. PVP with injection of 131I-loaded bone cement was carried out in the rabbits of the study group, while PVP with injection of pure bone cement was employed in the rabbits of the control group. The blood cell count was determined in all the animals one day before PVP as well as on the 4th day after PVP. PET-CT examination was performed one day before PVP as well as on the 4th day after PVP to check the stand uptake value (SUV) of each vertebral tumor. SPECT was performed in all rabbits of the study group at one, 4 and 8 days after PVP respectively to estimate the distribution of 131I in the animals’ bodies. Eight days after PVP, blood cell counts, which were determined both before and after PVP, existed between the study group and the control group. SPECT that was performed after PVP indicated that 131I was mainly accumulated within PVP-treated vertebrae, and the distribution of 131I showed no obvious changes at different points of time after the procedure. Before PVP, the difference in SUV between the two groups was of no statistical significance (F = 0.765, P > 0.05). In the study group, the postoperative SUV was significantly lower than the preoperative SUV (F = 423.792, P < 0.05). Pathological examination showed that the extent of tumor cell necrosis around the bone cement in the study group was remarkably bigger than that in the control group. Conclusion In treating vertebral tumors with PVP, the use of 131I-loaded bone cement is clinically feasible, and short-term follow-up indicates that this technique is safe and effective.

Objective To investigate the protective effect of breviscapine on ischemia-reperfusion renal injury, which provides scientific theoretical basis for clinical prevention and treatment of renal ischemia-reperfusion injury. Method 36 SPF male healthy SD rats were randomly divided into 3 groups, 12 rats in each group. Group A was ischemia-reperfusion group, group B was erigeron breviscapus injection preconditioning group, and group C was sham operation group. Rats in group A and C were injected with normal saline, while rats in group B were given 12 ml/kg erigeron breviscapus injection by intraperitoneal injection., After 14 days, renal function, renal antioxidant indexes, renal cell apoptosis indexes and expression of Bcl-2, Bax in renal tissue of three groups were compared. Results The indexes of renal function showed that blood urea nitrogen (BUN) and Serum creatinine (SCr) in group B were significantly lower than group A (P<0.05), but significantly higher than group C (P<0.05). Renal antioxidant indexes showed that superoxide dismutase (SOD) and malondialdehyde (MDA) in group B were significantly higher than group A (P<0.05), but significantly lower than group C(P<0.05). The index of renal cell apoptosis showed that the apoptosis index AI in group B was significantly lower than group A (P<0.01), but significantly higher than group C (P<0.01). The results of immunohistochemical staining showed that the expression of Bcl-2 in group B were significantly higher than that of group A and group C (P<0.05), and the expression of Bax in group B was significantly lower than that in group A (P<0.05) while significantly higher than group C (P<0.01). The ratio of Bcl-2/Bax in group B was significantly higher than group A and group C (P<0.05). Conclusion Erigeron Breviscapus Injection may have a protective role on renal ischemia reperfusion injury though antioxidant and anti-apoptosis.

A finite element model of cervical spine was three-dimensionally reconstructed through computed tomography (CT) scan, recording the edges of image using Snigraphics V18.0 software, and calibrating in sequence of point, line, area, and solid. The stress distribution of cervical C_(3-4) was analyzed using compute aided design to validate the availability of reconstructed models. Results showed that the three-dimensional finite element cervical C_(3-4) was feasible in simulation analysis. These indicate that the established three-dimensional finite element models can simulate biomechanical experiments, providing foundations for analyzing biomechanical performance of local structure of this finite element model under various pressure conditions.