Objective To investigate the imaging findings of combined hepatocellular carcinoma and cholangiocarcinoma(cHCC-CC) with dynamic MRI and spiral CT.Methods Twenty-three patients of cHCC-CC were evaluated.All patients had surgery and diagnoses were confirmed by histopathology.Eighteen patients had pre- and post-contrast scans with spiral CT.Five patients had MR with dynamic multi-phase contrast scanning.Imaging findings in all patients were retrospectively reviewed.Results CT of eighteen patients showed low-density masses with ill-defined margin (n =15 ),lymphadenopathy( n =5 ),invasion of blood vessels ( n =7 ),satellite lesions ( n =5 ),enhancing pseudocapsule ( n =9 ),and dilatation of intrahepatic ducts (n =1 ).MRI of five patients showed lesions with low signal on T1 WI and high signal on T2WI,lymphadenopathy(n =1 ),invasion of blood vessels (n =1 ),enhancing pseudocapsule (n =4).Dynamic CT or MRI enhanced scanning showed areas of heterogeneous enhancement in the interior or periphery of the tumor on the arterial phase,areas of inhomogeneous high signal ( corresponding regions of low signal on the arterial phase) on the portal venous phase,areas of mixed signal intensity due to retention of contrast agents on the delayed phase.Conclusions Combined hepatocellular carcinoma and cholangiocarcinom demonstrate imaging features on conventional and dynamic MRI and spiral CT,which can be helpful to improve the diagnostic accuracy of this disease.

Objective　To study the effects of MIP-1β and TGF-β antibody on CD34+ cells from cord blood in stroma-contact culture system. Methods　Immunomagnetic selected CD34+ cells were inoculated onto the pre-established irradiated human stroma layer. MIP-1β, TGF-β antibody (20 μg/ml) and MIP-1β+anti-TGF-β (5 μg/ml) were added on day 0 and day 5. On day 5 and day 10, cell counting, hematopoietic progenitor cells count were made by semi-solid culture and CD34+ cells were assayed by FACS. Results　On day 5, no significant difference of total cell number was observed as compared with the control group (P>0.05), but the number of CD34+cells, CFC, and HPP-CFC in TGF-β antibody and MIP-1β+ TGF-β antibody groups was significantly higher than that in the control (P<0.05). On day 10, the number of total cell, CD34+ cells, CFC, and HPP-CFC in TGF-β antibody and MIP-1β+ TGF-β antibody groups was significantly higher than that in the control (P<0.05). No significant difference was observed between groups MIP-1β and control either on day 5 or day 10 (P>0.05). Conclusion　MIP-1β has no significant effect on the CD34+ cells as compared with the control while the CD34+ cells can be expanded 1-3 folds with TGF-β antibody (20 μg/ml) or MIP-1β+ TGF-β antibody (5 μg/ml) in 10 days. There are synergic interactions between MIP-1β and TGF-β antibody.

Objective To explore the levels of?-radiation emitted from ceramic floor boards saled in Tangshan.Methods The levels of?-radiation emitted from common ceramic floor boards,polished surface-ceramic floor board s and granular surfac-ceramic floor boards manufactured in A,B and C different provinces were determined.All sam ple s were collected from the build ing ma te rial markets in Tangshan.Results The levels of?-radiation emitted from ceram-ic floor boards were91.1,76.8,75.1nGy /h for those manufactured in A,B and C province respectively,and92.7,88.9,78.0nGy /h for granular sur face-ceramic floor boards,polished surface-ceramic floor boards and com mon ceramic floor boards respec tively.Con clu sion For the consumers,the first selection of the common ceramic floor boards to dec-orate the floor was recommended.

Objective To Describe the queuing mathematical model and analyze the reasonable hospital application pattern of electronics voluntary system.Methods By scientifically arranging medical care personnel and equipment,patients queuing process was optimized.Results We successfully applied the outpatient real-time computer information management system of electronics voluntary based on this mathematical model.Conclusion It is a possible way to optimize the queuing process and improve the efficiency in electronic triage system based on queuing theory.

Objective·To explore the biologic effect and mechanism of adenanthin (Aden) on multiple myeloma (MM) cells. Methods·MM cells, H929 and U266 were treated with various dose of Aden for different time, and the density and viability of MM cells were detected by trypan blue exclusion assay. After H929 and U266 cells were treated with various dose of Aden for 24 hours, cell growth inhibition was examined by CCK8 assay, and cell apoptosis was examined by AnnexinV-APC/PI staining assay. Apoptosis related proteins, NF-κB signaling pathway associated proteins and the NF-κB regulated proteins were detected by Western blotting. The effect of Aden on the thermal stability of IKKβ protein was determined by CETSA assay. Results·Trypan blue exclusion results showed that Aden inhibited cell growth and reduced cell viability in concentration and time dependent manners. U266 was more sensitive than H929 when exposed to the same concentration of Aden. The CCK8 results showed that Aden inhibited the growth of H929 and U266 cells in a concentration dependent manner. Flow cytometry results suggested that Aden induced a low apoptosis rate of MM cells. Moreover, cleavage of caspase3 and PARP were detected in U266 cells but not in H929 cells. CETSA assay indicated that Aden decreased the thermal stability of IKKβ. Expression of p-p65 and p-IκBα proteins decreased in MM cells treated with Aden. Conclusion·Aden significantly inhibits MM cell proliferation by inhibiting NF-κB activation through interacting with IKKβ. Aden has little effect on apoptosis of MM cells.

Objective To investigate the methylation status of the CpG island of tumor suppressor gene PCDH 8 and its clinical significance in bladder cancer tissues .Methods 79 cases of primary bladder transitional cell carcinoma and 20 cases of normal blad-der mucosa tissue were collected ,and then the promoter methylation status of PCDH8 gene was examined by methylation specific PCR (MSP) ,and correlated with clinical pathological data for statistical analysis .Results We found that no PCDH8 gene methyla-tion was detected in 20 normal bladder mucous tissues ,while PCDH8 promoter methylation was found in 44 cases of total 79 prima-ry bladder transitional cell carcinoma tissues ,the methylation rate was 55 .7% ,and the difference was statistical significant between normal bladder mucous group and bladder cancer group (P<0 .01) .The promoter methylation of PCDH8 gene in bladder transi-tional cell carcinoma tissues did not correlate with patient′s age ,gender ,tumor number (P>0 .05) ,the methylation rate of PCDH8 gene in tumors whose diameter more than 3 cm was 72 .7% ,while the methylation rate of PCDH8 gene in tumors whose diameter less than 3 cm was 43 .5% ,and the difference was significant(P< 0 .05) .The methylation rate of PCDH8 gene in the papillary tumor was 48 .2% ,while the methylation rate of PCDH8 gene in the unpapillary tumor was 73 .9% ,and the difference was signifi-cant(P<0 .05) .The methylation rate of PCDH8 gene in recurrent tumors was 71 .1% ,while the methylation rate of PCDH8 gene in primary tumors was 35 .3% ,and the difference was significant(P<0 .05) .The methylation rate of PCDH8 gene in tumors with G1 ,G2 phase was 43 .4% ,while the methylation rate of PCDH8 gene in tumors with G3 was 80 .8% ,and the difference was signifi-cant(P<0 .05) .The methylation rate of PCDH8 gene in the tumors with Ta T1 phase was 43 .7% ,while the methylation rate of PCDH8 gene in tumors with T2 T4 was 74 .2% ,and the difference was significant(P<0 .05) .Our result suggested that PCDH8 gene methylation was associated with tumor growth ,morphology ,recurrence ,poor differentiation and tumor invasion (P<0 .05) . Conclusion The promoter methylation of tumor suppressor gene PCDH8 is closely correlated with the occurrence and development of primary bladder transitional cell carcinoma .The promoter methylation of PCDH8 gene could be used as molecular markers of ear-ly diagnosis ,monitoring and prognosis biomarker in bladder cancer .

ObjectiveTo examine the effects of temsirolimus, an inhibitor of mammalian target of rapamycin, on bladder cancer cell lines T24 and BIU-87 in vitro and in vivo for purpose of evaluating the probability of mTOR targeted therapy for bladder cancer.MethodsAfter being treated by a different concentration of temsirolimus, T24 and BIU-87 cells were tested by MTT assay for cell proliferation activity.Cell cycle and apoptosis analysis were performed with flow cytometer. Wound scratch assay was used for cell migration activity and transwell motility assay. Western blot analysis was used to test the mTOR phosphorylation. Subcutaneous inoculation of 6-week-old nude mice was performed using 1 × 106 T24 cells in 50％ matrigel for both control (n = 10) and temsirolimus (n = 10) groups. The volume of tumors was examined and then the expression of Ki-67 was detected by immunohistochemistry.ResultsTemsirolimus significantly inhibited proliferation of T24 and BIU-87 cells in a dose- and time-dependent manner. After administration of temsirolimus on T24 and BIU-87 cell lines for 24 h, the rate of wound healing in 0 nmol/L groups were (88.9 ± 14. 1 ) ％ and ( 83.6 ± 16.3)％ , which were higher than in the 5 nmol/L groups, which were (42.7 ± 11.6) ％ and ( 36.9 ± 9.7 ) ％ ( P ＜ 0.05 ). In the transwell motility assay, the number of cells in the 0 nmol/L group was 26.5 ± 5.8 and 28.2 ± 4.6, which was higher than in the 5 nmol/L group ( 19.0 ±3. 8 and 21.3 ± 5.1, respectively) (P ＜ 0. 05). When temsirolimus was administered on T24 and BIU-87 cell lines for 48 h the percentages of cells delayed in phase G0/G1 in 5 nmol/L group were ( 77.46 ±6.11)％ and (73. 39 ± 4. 94)％ respectively, and higher than in the 0 nmol/L group, which were (65.99 ±5.01 )％ 、(60.15 ±3.98)％ (P ＜0.05). There was no statistically significant difference in the apoptosis rate between the two groups (P ＞ 0.05 ). In Western blot analysis, the ratios of p-mTOR/β-actin were 0.92 ±0.09 and 1.01 ± 0.08 in 0 nmol/L group, and higher than in the 5 nmol/L group (0.47 ±0.05、0.04 ±0. 01 ) (P ＜ 0.05 ). After administration of temsirolimus for 21 days, the tumor volume in nude mice in the control group were 351.1 ± 139.9 mm3 , which was larger than 351.1 ± 139.9 mm3 in the temsirolimus group ( P ＜ 0.05 ). The positive rate of Ki-67 expression was ( 67.3 ± 8.4 ) ％ in the control group, which was higher than in the temsirolimus group ( 35.5 ± 6.7 ) ％ ( P ＜ 0.05 ).ConclusionsThis study provides in vitro and in vivo evidence that temsirolimus may inhibit the viability of bladder cancer cells and temsirolimus could be exploited as a potential therapeutic strategy in bladder cancer.

This study is to establish a cell-based model targeting to neuraminidase (NA) of the 2009 H1N1 influenza A virus. NA is an influenza virus structural protein with enzymatic activity of the cleavage of HA-sialic acid interaction to release new viral particles from cells. A model of HIV-1 (pNL4-3.Luc.R(-)E(-)) based pseudovirions packed with HA [hemagglutinin, A/VietNam/1203/2004 (H5N1)] and NA [A/California/04/2009 (H1N1)] was established to evaluate compounds activities on NA function. The viral release can be blocked by neuraminidase inhibitors, oseltamivir and oseltamivir carboxylate, with IC50 of (61 +/- 31) nmol L(-1) and (5.5 +/- 2.9) nmol L(-1) respectively. A point mutation of H275Y on NA leads oseltamivir-resistance. This corresponding mutation was introduced into the system which was also confirmed by oseltamivir and oseltamivir carboxylate.

Based on the educational structure theory, the difference between mass education and elite education is probed at the macroscopic level to make it clear that the essence of Physician education and training program of excellence is elite education for occupational purposes; at the mi-croscopic level the orientation of English teaching for the class ofexcellent physicians is determined as English for occupational purposes. Moreover, the curriculum system of medical English is designed, and teaching materials associated with clinical medicine are selected, the language laboratory simulat-ing hospital scenes is constructed, and the transboundary team of teachers is built comprising university teachers and doctors in hospitals. At the level of individual, the competency model of English forexcellent physicianshas been developed, English competence requirements in medical industry being clearly established . In a word , the study of macrostructure points out the direction and target of English teaching for excellent physicians; the study of microstructure perfects the mode of English teaching forexcellent physicians;and the study of individual structure indicates the ultimate foothold of English education forexcellent physicians. Three aspects are integrated into an organic whole.