Objective To study the difference between central and peripheral position of contrast gray-scale imaging in rabbit′s liver.Methods Ultrasound contrast agent(UCA) SonoVue TM ( 0.1 ml/kg) was applied respectively in 8 normal rabbits by intravenous bolus injection.Corresponding parameters of the time-intensity curve: time to enhancement(ET),time to peak intensity(PIT),peak signal intensity(PSI),mean transit time(MTT) and area under the curve(AUC) were measured using low mechanical index contrast gray-scale imaging and Wash-in/Wash-out time intensity curve software.Results There was significant difference of parameters of the time-intensity curve between central position and peripheral position of parenchyma ( P

Objective To study the relationship between doses of ultrasound contrast agent(UCA) and contrast-enhancement effects of gray-scale imaging in rabbit liver. Methods Ultrasound contrast agent SonoVue TM in eight different doses ( 0.02 - 0.16 ml/kg) was applied respectively in five normal rabbits in randomized order as a bolus in a marginal ear vein followed by a 1.5 ml saline flush. Corresponding parameters of the time-intensity curve: time to enhancement(ET),time to peak intensity(PIT),peak signal intensity(PSI),mean transit time(MTT) and area under the curve(AUC) were measured using low mechanical index contrast gray-scale imaging and Wash-in/Wash-out time intensity curve software package. Results Along with an increase of the SonoVue TM dose,the MTT and the AUC increased exponentially,and the ET decreased exponentially. The PSI of portal vein and liver parenchyma increased only in the dose range from 0.02 ml/kg to 0.10 ml/kg ( r = 0.89 and 0.92 ,respectively),and decreased with a further increase of the UCA dose. A possible explanation for this effect is the bubble saturation and attenuation. No significant correlation was found between the UCA dose and the PIT( r = -0.35 and 0.22 ,respectively). Conclusions The parameters of time-intensity curve are influenced intensely by different UCA dose. It is important to grasp the relationship between the UCA doses and contrast-enhancement effects for microcirculatory quantification. The 0.10 ml/kg appears to be the optimal dose for tissue perfusion studying because it significantly improved videointensity and duration of enhancement and did not result in the bubble saturation and attenuation.

Objective To evaluate the behavior and bone destruction of the mouse model of bone cancer pain signs. Method A mouse model of bone cancer pain signs was developed by intra-femur inoculations of Lewis lung carcinoma cells in C57BL/6 mice. Spontane-ous lifting time, ambulatory score and paw withdrawal latencies to radiant heat stimulation were measured in alternative days throughout the experiment. The structural damage of the femur were monitored by radiogram on the 7th, 15th and 23rd day respectively, and the pathohisto-logical changes of the femur bones were observed by hematoxylin-eosin staining (HE) staining on the same days. Meanwhile, the glial fibril-lary acid protein (GFAP) immunohistochemistry changes of the spinal cord in lumbar segments on the 23rd day after inoculation were ob-served. Results Mice received intra-femur inoculation of Lewis lung carcinoma cells gradually developed spontaneous pain, which was be-ginning on the 11th day after inoculation, followed by move-evoked pain and thermal allodynia. On the 23rd day after inoculation, X-ray film showed that medullary cavity of ipsilateral distal femur were filled with tumor cells and full thickness cortical bone was lost. Furthermore, tumor cells invaded peripheral muscles. Astrocytes on the inoculated side of the spinal cord were activated. Conclusion Lewis lung carci-noma cells were a good choice to build a mouse bone cancer pain.

OBJECTIVE:To establish a method for the determining contents of 2 lignan components[dehydrodiisoeugenol and 2,3-dihydro-7-methoxy-2-(3,4-methylened ioxyphenyl)-3-methyl-5-(E)-propenyl-benzofuran(referred to“lignanoid 2”)]. METH-ODS:HPLC method was adopted. The column was Elite C18 with the mobile phase of water-methanol(gradient elution)at the flow rate of 1.0 ml/min;the detection wavelength was 225 nm and the column temperature was 30 ℃. The sample size was 20 μl. RE-SULTS:There was a good linear relationship between sample quantity and the peak area in the range of 0.202-2.02 μg(r=0.999 9) and 0.204-2.04 μg(r=0.999 9)for 2 lignan components. The RSD of precision,stability and repeatability tests were less than 2%with the average recovery of 101.54%(RSD=0.60%,n=6)and 99.43%(RSD=1.09%,n=6). CONCLUSIONS:The method is simple,sensitive and accurate,and can be used for the quantization determination of dehydrodiisoeugenol and lignanoid 2 in nut-meg-5.

Objective To investigate the effect of immediately lymphatic reconstruction (LR) after heterotopic small bowel transplantation on pharmacokinetics (absorption and transportation) of FK506. Methods Male Brown-Norway (BN) and Lewis (LEW) rats were divided to two groups. Group A: BN→LEW+LR+FK506 ( n =12); Group B: BN→LEW+FK506 ( n =12). FK506 at a dose of 5?mg/kg per day was taken through stoma. At 1, 4, 7 and 14 postoperative day (POD), venous blood 0.5?ml was obtained on the 1.2 , 2 and 3?h after administration of FK506. Whole blood concentration of FK506 was analyzed by microparticle enzyme immunoassay and a kit of monoclone antibody. Results At the every phase of early period after transplantation (1, 4, 7 POD), the levels of FK506 in plasma were significantly higher in group A than in group B ( P

Background and purpose:Tumour cell is recognized and rejected by immunocytes.The local infiltration of immunocytes and the clinical curative effect after the percutaneous microwave coagulation therapy(PMCT) is worthy of further study.We investigated the local immune response after PMCT under ultrasound guidance and evaluated if the local immune response had any influence on the prognosis of patients.Methods:89 cases of patients with hepatocellular carcinoma were treated by PMCT.At the time of the fourth week after PMCT and before PMCT,the patients were given percutaneous biopsy under ultrasound guidance.And the samples were stained by immunohistochemical methods.Then the infiltration of CD4+、CD57+ and CD68+ of local treatment areas were compared before and after the treatment of PMCT.Meanwhile,the patients underwent follow-up to survey the possibility of recrudescence.Moreover,the authors analyzed the relation between the infiltration of immunocytes and recrudescence.Results:A few CD4、CD57 and CD68 positive cells were observed in the cancer stoma and tissues surroundings the liver before PMCT.After PMCT,the immunocytes of CD4、CD57 and CD68 positive cells were significantly increased both in the cancer and the adjacent liver tissue.These immunocytes were enlarged in size.The infiltration of CD4+、CD57+ and CD68+ increased significantly in post-PMCT as compared with those of pre-PMCT(P

AIM: To observe the changes of interleukin-6(IL-6), IL-8 and tumor necrosis factor-?(TNF-?) in serum and lung at different time, and the effects of anisodamine (654-2) treatment in rats with oleic acid-induced ARDS. METHODS: The ARDS model induced by intravenous injection of oleic acid in the rat was used and levels of IL-6, IL-8, TNF-? in serum and lung tissue supernatant were measured using enzyme linked immunosorbent assay (ELISA). RESULTS: Levels of serum and lung tissue IL-6, IL-8, TNF-? in oleic acid type ARDS 4 h group were increased significantly. These cytokines in oleic acid type ARDS 8 h group were lower than that of ARDS 4 h group, but serum IL-6, TNF-? and lung tissue IL-6 were still higher than that of control group . In oleic acid type ARDS 16 h group, serum IL-6, TNF-? were lower than that of the ARDS 8 h group and serum TNF-? and lung tissue IL-6 were higher than that of control group. After 654-2 treatment, the levels of serum and lung tissue IL-6, TNF-? were decreased significantly. CONCLUSION: IL-6, IL-8 and TNF-? might play important roles in the oleic acid-induced ARDS in the rat. 654-2 might alleviate ARDS by inhibiting excess production of IL-6 and TNF-?.