Objective To explore the diagnostic value of MRE for differentiating hepatic benign and malignant tumors.Methods 36 patients with liver tumor (a total of 39 lesions,including 20 hepatocellular carcinomas,7 hemangiomas,5 cholangiocellular carcinomas,3 metastases,2 hepatic angiomyolipomas,1 carcinosarcoma,1 castleman’s disease)and 9 healthy volunteers were evaluated with MRE.The elastogram were generated with FUNCTOOL post processing program.The mean value of elasticity of hepatic malignant tumors,hepatic benign tumors,hepatic parenchyma around the malignant tumors,hepatic parenchyma around the benign tumors and the normal liver of healthy volunteers were measured and compared.Results The mean value of elasticity of malignant tumors [(7.39±1.70)kPa]was significantly higher than these of benign tumors [(4.11±0.37)kPa,P < 0.001],peripheral parenchyma around the malignant tumors [(3.50±0.73)kPa,P < 0.001],peripheral parenchyma around the benign tumors [(2.61±0.45)kPa,P < 0.001] and normal liver of healthy volunteers [(2.38±0.24)kPa,P <0.001].The mean value of elasticity of parenchyma around the malignant tumors [(3.50±0.73)kPa]was significantly higher than that of hepatic parenchyma around the benign tumors [(2.61 ± 0.45)kPa,P <0.001].The mean value of elasticity of hepatic parenchyma around the benign tumors [(2.61±0.45)kPa]was slightly higher than normal liver of healthy volunteers [(2.38±0.24)kPa],and there was no significant difference between the two (P >0.05).A cutoff value of 5.08 kPa can accurately differentiate malignant tumors from benign tumors and normal liver parenchyma.Conclusion MRE could be used in diagnosis of hepatic focal tumors,which is helpful for differentiating benign and malignant liver tumors.

BACKGROUND:Magnetic resonance diffusion tensor imaging can display the dispersion changes of peripheral nerve injury and be used to conduct quantitative research, so it has good application prospects in displaying the nerve injury and regeneration. OBJECTIVE:To investigate the possibility of magnetic resonance diffusion tensor imaging of rabbit acute sciatic nerve traction injury, and to figure out the value of diffusion tensor parameters in the diagnosis of peripheral nerve injuries and to reveal the pathologic basis. METHODS:The right hind limb sciatic nerves of 32 New Zealand white rabbits were selected to make the regeneration and repair models, the left hind limb nerves as the sham-operation side. Diffusion tensor imaging examination of sciatic nerves were performed at 1 and 3 days, 1, 2, 3, 4, 6 and 8 weeks after operation with 1.5 T MRI. Fractional anisotropy and apparent diffusion coefficient were measured through diffusion tensor tracing
reconstruction, and then the pathological examination was performed. RESULTS AND CONCLUSION:Diffusion tensor imaging revealed only the proximal nerve, injured nerve as wel as the middle of the distal nerve at 1 day after traction injury. At 1 week, the nerve of distal portion appeared thinner and shorter fiber bundle. At 2-6 weeks after operation, the fiber bundle was increased and thickened. At 8 weeks after operation, the distal nerve fibers had nearly restored to the level before injury. There was significant difference in the fractional anisotropy value of traction portion and distal portions between traction injury and sham-operation group at 1 day-8 weeks after operation (P<0.05). While there was significant difference in the fractional anisotropy value of proximal traction portion between traction injury and sham-operation group 1 day-1 week after operation (P<0.05). There were no significant differences in the apparent diffusion coefficient values between traction injury and sham-operation group at 1 day-8 weeks after operation. Fal of fractional anisotropy value in the early stage of nerve traction injury was the result of myelin sheath broke down and axonal disintegrated;recovery of fractional anisotropy value resulted from myelin sheath proliferated and myelin sheath grew slowly to mature. Diffusion tensor tracing can show the abnormal change of the sciatic nerve with traction injury in rabbit clearly and early, and the measurement of fractional anisotropy value can be used as the sensitive method to monitor the degeneration and regeneration after nerve traction injury.

Objective To investigate the nursing points of pancreatic leakage after upper abdominal multiple organ transplantation. Methods A retrospective study was conducted on the nursing experience of two patients with end-stage liver disease and type 2 diabetes mellitus who were complicated with pancreatic leakage after upper abdominal multiple organ transplantation from March 2009 to July 2015. Results The blood glucose of these patients returned to normal level within 1 week after operation and insulin was discontinued. Pancreatic leakage was occurred in the two patients at 14 and 21 days after operation, respectively. They were both successfully discharged after active treatments and nursing cares including completely drainage, the application of drugs that inhibited the secretion of pancreatic enzymes and digestive tract glands, strengthening infection control, nutritional support and other conservative treatments. Conclusions It is the key to improve the recovery of pancreatic leakage after upper abdominal multiple organ transplantation with careful observation of abdominal signs and abdominal drainage tube, accurate use of somatostatin, nutritional support, maintenance of water and electrolyte balance, and psychological intervention.

Objective To explore the effects of different time spans for off-bed activities on postoperative rehabiliatioin of patients with liver transplantation. Methods The clinical data of 42 patients having undergone allogeneic liver transplantation during Jan. 2014 to Oct. 2015 were assigned as the observation group. Another 44 patitents during the same period , matched to those in the observation group in terms of general data , were assigned as the control group . The clinical data of two groupos were reviewed to make comparisons in terms of the time for anus exhaust , the time spans for gastric tube and urinary catheter indwelling , abdominal cavity effusion and hemorrhage and pulmonary infection 3 days after operation. Result The time for anus exhaust and the time spans for gastric tube and urinary catheter indwelling in the observation group were all significantly shorter than the control gorup (P<0.05), but there were insignifiant differences between the groups in abdominal cavity effusion and hemorrhage and pulmonary infection. Conclusion Off-bed activities 3 days after operation is safe and feasible for the patients having undergone allogeneic liver transplantation. It can promote their process of rehabilitation.

Objective The expression of chemokine C-X-C motif ligand 13 (CXCL13) within liver in primary biliary cholangitis (PBC) patients is significantly increased, but its origin and mechanism is not clear yet.The study aimed to investigate the expression of CXCL13 in the liver of mice through establishing a mouse model of PBC.Methods C57BL/6 mice were randomly divided into experiment group (n=20) control group(n=10).The mice in the experimental group were intraperitoneally injected with polyriboinosinic polyribocytidylic acid (Poly I:C) while the mice in control group were injected with PBS of the same volume.The level of serum AMA was quantified by ELISA and intrahepatic inflammatory cells were assessed by HE staining.Kupffer cells, liver sinusoidal endothelial cells, and infiltrating lymphocytes in the liver of mice were collected by in situ perfusion enzyme digestion and magnetic bead separation methods.The transcriptional level of intrahepatic CXCL13 in liver tissues and cell subpopulations were detected by qPCR.Results The serum AMA titers of the mice in experiment group increased gradually with the prolonging of modeling time and the positive rates at the 4th, 8th, and 12th week after the first injection of Poly I:C were 5.9%, 52.9% and 76.5% respectively.While the serum AMA titers of the mice in control group were at a lower level through the modeling process, with only 2 mice presenting a little higher level above positive cutoff value at the 12th week.The results of HE staining in liver tissues of both groups showed that there were a great amount of intensely infiltrating inflammatory cells in the mice of experimental group while no inflammatory cell infiltration were found in the mice of control group.The separation purity of Kupffer cells and liver sinusoidal endothelial cells in the mice of experiment group tested by flow cytometry were 76%-80%, 68%-72% respectively.Compared with the CXCL13 mRNA level in Kupffer cells [2.34(0.22-8.64)], the expression levels in liver sinusoidal endothelial cells and infiltrating lymphocytes declined[0.27(0.03-1.64), 0.05(0-0.22), P<0.05].Conclusion The chemokine CXCL13 is predominantly produced by Kupffer cells in the liver of PBC mice established by Poly I:C injection.

Objective To explore the expression level and clinical significance of multifunctional CD8 T cells in patients with tuberculosis (TB). Methods The expression levels of MTB antigen specific and non-specific multifunctional CD8 T cells among peripheral blood mononuclear cells (PBMCs) and pleural fluid mononuclear cells (PFMCs) in TB patients, latent tuberculosis infection patients (LTBI) and healthy controls (HC) were measured by flow cytometry. Results The expression level of multifunctional CD8 T cells (IL-2+IFN-γ+TNF-α+CD8 T cells) among PBMCs stimulated by non-specific MTB antigen in TB patients was (5.72 ± 4.32)%, which was significantly lower than those in HC and LTBI [(22.3 ± 15.7)%, q=7.455, P<0.001;(14.2 ± 7.72)%, q=3.110, P<0.05]. Under the stimulation by specific MTB antigen, the expression level of multifunctional CD8 T cells among PBMCs in TB patients was (0.33 ± 0.83)%, which was significantly higher than those in HC and LTBI [(0.017 ± 0.03)%, q=3.97, P<0.05;(0.019 ± 0.035)%, q=3.39, P<0.05]. In patients with tuberculous pleurisy, the expression level of multifunctional CD8 T cells among PFMCs was (0.623 ± 1.033)%, which was significantly higher than that among PBMCs [(0.034 ± 0.066)%, P<0.001]. The expression level of multifunctional CD8 T cells in TB patients was negatively correlated with HRCT score (r=-0.265 8, P=0.015 8). Conclusion The expression level of multifunctional CD8 T cells was contributed to discriminate TB patients from latent tuberculosis infection patients , and was closely related to the degree of damage in lung.

Objective To make sciatic nerve traction injury models of rabbit , in order to prospectively evaluate possibility and accuracy of diffusion tensor tracking (DTT) in sciatic nerve injures. Methods The right sciatic nerves of 32 New Zealand white rabbits were selected for traction injury , and the left sciatic nerves were the sham operation side. DTI scan was performed before and after the operation on 1st day , 3rd day, and 1 week, 2, 3, 4, 6 and 8th week respectively, and DTT was reconstructed. Then the length of reconstructed fiber tracts and fiber density index were calculated. After the MRI scan , the sciatic nerve was removed to perform pathologic examination at different time points. Results The difference of the length of reconstructed fiber tracts between nerve traction injury and sham operation side was significant at 1 day~2weeks after operation (P<0.05), while the difference was not significant at 3~8 weeks.The fiber density index of nerve traction injury and sham operation side was significantly different at 1 day~8 weeks(P<0.05). 1day after operation, myelin sheath of traction portion was obviously twisting. 3 days after operation , a large amount of myelin sheath broke down. 2 weeks after operation , axon, myelin sheath degeneration and regeneration coexisted at the same time. 8 weeks after operation , nerve fibers regenerated and restored to normal structure. Conclusion The length time curve and density index-time curve of nerve traction injury are consistent with the changes of pathology , which can be used as a supplementary method to evaluate the degeneration and regeneration in nerve injury.

OBJECTIVETo study the effects of different penetration enhancers on the transcutaneous permeability of syringin, chologenic acid and rutin in Xuelian cataplasm in vitro and to determine the effective enhancer.

METHODUsing improved Franz-type diffusion cell and excised big mouse skin in vitro as transdermal barrier, the kinetics parameters of syringin, chologenic acid and rutin in Xuelian cataplasm such as cumulative permeation quantity, permeation rate were determined by HPLC. The enhancement ability of azone (A-zone), propylene glycol (PG) was investigated when used either uniquely or combinatively.

RESULTWith the 7% azone, the syringin, chologenic acid and rutin in Xuelian cataplasm could penetrate through the skin of rats well.

CONCLUSIONThe selection of the best penetration enhancers provide reference for Xuelian cataplasm.

Animals ; Drug Carriers ; chemistry ; Drugs, Chinese Herbal ; chemistry ; pharmacokinetics ; Glucosides ; chemistry ; pharmacokinetics ; In Vitro Techniques ; Mice ; Permeability ; Phenylpropionates ; chemistry ; pharmacokinetics ; Propylene Glycol ; Rats ; Rutin ; chemistry ; pharmacokinetics ; Skin Absorption

The aim of this study was to investigate the effect of Paris saponin I (PS I) on human gastric carcinoma cell growth and apoptosis and to explore the potential mechanisms. The proliferation of SGC7901 cells was monitored by the MTT cell viability assay, while the nuclear morphology of apoptotic cells was assessed by Hoechst 33258 staining. Flow cytometry was performed to analyze the cell cycle progression of propidium iodide (PI)-stained SGC7901 cells and the apoptotic rate of annexin V/PI-stained cells. Western blotting was used to examine the expression of several cell cycle proteins, including cyclin B1 and Cdk1, and the apoptosis-regulated proteins Bcl-2, Bax, cytochrome c, procaspase-9, and procaspase-3. The MTT assay demonstrated that PS I could induce significant dose- and time-dependent inhibition of SGC7901 cell proliferation. Marked morphological changes, including condensation of chromatin, nuclear fragmentation and apoptotic bodies were clearly shown on Hoechst 33258 staining. PSI treatment also resulted in the disruption of the cell cycle at G(2)/M and the induction of apoptosis. Following PSI treatment, the cell cycle-related proteins cyclin B1 and Cdk1 were down-regulated. Expression of the pro-apoptotic protein Bax was increased, while anti-apoptotic protein Bcl-2 decreased. PSI treatment resulted in elevated cytoplasmic cytochrome c and activation of the apoptotic proteases caspase-9 and caspase-3. These data indicate that PS acts as an inhibitor of proli I feration in SGC7901 cells by inducing cell cycle arrest and mitochondria-dependent apoptosis. PSI is a potential therapeutic agent against human gastric carcinoma.

Objective To investigate the correlation between eigenvalues(λ∥ andλ⊥)of sciatic nerve and limb function in a rabbit model of acute nerve traction inj ury for finding the role ofλ∥ andλ⊥ on diagnosis of nerve inj uries.Methods The right sciatic nerves of 32 Newland rabbits were selected to be performed as traction injury,and then left sciatic nerves were treated as control for the sham operation side.MRI DTI scan was performed before and after the operation on 1 day ,3 day,and 1 week,2,3,4,6 and 8 weeks respectively.Theλ∥ andλ⊥ of inj ured sciatic nerves and sham operated nerves were measured,meanwhile functional exami-nations were evaluated,and then analyzing the correlation betweenλ⊥ of inj ured sciatic nerves and the score of inj ured limb function in the periods of 3 days to 8 weeks;finally different portions of sciatic nerve were removed for histological examinations.Results Theλ⊥ of inj ured sciatic nerves in the proximal portion was slightly increased at 3 days and recovered to the normal at 2 weeks.Theλ⊥ of inj ured sciatic nerves in the traction portion and distal portion were slightly raised at 1 day,reached to its maximum value at 3 days,and then decreased gradually after 1 week and dropped to the pre-operation level after 4 weeks.Theλ⊥ of inj ured sciatic nerves in the proximal portions was significantly higher than that of the sham-operated nerves from 1 day to 1 week(F=7.275,P=0.000). Theλ⊥ of inj ured sciatic nerves in the traction portion and distal portion were significantly higher than that of the sham-operated nerves from 1 day to 3 weeks(F=5.851,F=3.794,P=0.001,P=0.000).However,there was no significantly difference between theλ∥ of inj ured nerves in each portion and sham-operated nerves .The negative correlation between theλ⊥ of inj ured sciatic nerves in the distal portion and the score of the nerve function in the injured limb was found (r=-0.938,r=-0.897,P<0.01).Conclu-sion Theλ⊥ of inj ured nerves in the traction portion and distal portion could monitor the process of degeneration and regeneration of sciatic nerve in traction inj ury,while theλ∥ plays no obvious role in diagnosis of nerve inj uries.