The utilization of mobile library users in Shanxi Medical University and its First and Second Affiliated Hospitals was investigated. The needs of mobile library users and the factors influencing the utilization of mobile li-brary were analyzed with strategies proposed for perfecting the construction of mobile library.

Objective This study was conducted to measure the mandibular incisive canal (MIC) by cone beam computed tomography(CBCT)and to assess 3?dimensional structure, course and adjacent structure of the MIC , in order to ensure safe region for surgery of the mandibular interforaminal area. Methods A total of the CBCT images from 83 patients were studied and measured. The detection rates of MIC were calculated The diameter of the MIC and the distances from MIC to the labial and lingual cortices and the inferior border of the mandible and tooth tips were measured at canines and lateral incisors. Results MIC was found in 67.8%of the patients. In the position of canine, the diameter of MIC, the mean distance of the MIC to the tips of the teeth, to the buccal border of the mandible , to the lingual border of the mandible and the inferior border of the mandible were (1.3±0.4), (8.9±2.9), (4.3±0.9), (5.2±1.1) and (8.6± 1.5) mm, respectively. In the position of the incisor, the distance of MIC, the mean distance of the MIC to the tips of the teeth, to the buccal border of the mandible , to the lingual border of the mandible and the inferior border of the mandible were (1.0 ± 0.3), (13.3 ± 4.0), (4.2 ± 0.9), (5.9 ± 0.9) and (8.9 ± 1.8) mm, respectively. Conclusion CBCT clearly show three dimensional structure, course and adjacent structure of the MIC. Preoperative CBCT can provide vital information for surgery of the mandibular interforaminal area.

Objective:To detect the expressions of chemokine receptor 6 (CCR6), CC chemokine ligand 20 (CCL20) E-cadherin and vimentin in tissues of colorectal cancer and their paired liver metastases, and to investigate the possible mechanism of CCR6 in liver metastasis of colorectal cancer.Methods:A total of 62 cases (54 cases of colon cancer and 8 cases of rectal cancer) of primary colorectal adenocarcinoma resection with wax lumps were selected from the First Hospital of Shanxi Medical University and Shanxi Oncology Hospital from 2009 to 2017 with complete data, including 20 samples of colorectal cancer resection with liver metastasis during the same period. The expressions of CCR6, CCL20, E-cadherin and vimentin in colorectal cancer and liver metastases tissues were detected by immunohistochemistry, and the relationships between the expressions of CCR6, E-cadherin and vimentin and the clinicopathological features of patients were analyzed. Logistic multivariate regression was used to analyze the relationship between liver metastasis and clinicopathological features, CCR6, E-cadherin and vimentin. Spearman correlation was used to analyze the correlations between CCR6 and E-cadherin and vimentin.Results:The positive expression rate of CCR6 in colorectal cancer tissues was 66.1% (41/62), 85.0% (17/20) in colorectal cancer with liver metastasis and 70.0% (14/20) in liver metastasis tissues. The positive expression rate of CCL20 in colorectal cancer tissues was 83.9% (52/62), 90.0% (18/20) in colorectal cancer with liver metastasis and 90.0% (18/20) in liver metastasis tissues. The positive expression rate of E-cadherin in colorectal cancer tissues was 67.7% (42/62), 50.0% (10/20) in colorectal cancer with liver metastasis and 65.0% (13/20) in liver metastasis tissues. The positive expression rate of vimentin in colorectal cancer tissues was 79.0% (49/62), 85.0% (17/20) in colorectal cancer with liver metastasis and 90.0% (18/20) in liver metastasis tissues. The expression of CCR6 was closely related to lymph node metastasis ( χ2=11.142, P=0.001), liver metastasis ( χ2=4.694, P=0.030) and TNM stage ( χ2=21.785, P<0.001). E-cadherin was closely related to lymph node metastasis ( χ2=4.694, P=0.030), liver metastasis ( χ2=4.253, P=0.039) and TNM stage ( χ2=7.867, P=0.005). Vimentin was closely related to lymph node metastasis ( χ2=7.293, P=0.007) and TNM stage ( χ2=5.712, P=0.017). CCR6, E-cadherin and vimentin were independent of gender, age, tumor site, tumor size and differentiation degree of colorectal cancer patients (all P>0.05). Logistic regression analysis showed that the expressions of CCR6 ( OR=6.812, 95% CI: 1.206-38.474, P=0.030) and E-cadherin ( OR=0.256, 95% CI: 0.069-0.945, P=0.041) were independent factors affecting the liver metastasis of colorectal cancer. Spearman correlation analysis showed that CCR6 was associated with E-cadherin expression ( r=0.454, P=0.044) and vimentin expression ( r=0.509, P=0.022) in 20 iver metastasis tissues of colorectal cancer. Conclusion:CCR6 may promote colorectal cancer progress and liver metastasis by part of epithelial-mesenchymal transition.

Nanotechnology has emerged as an ideal approach for achieving the efficient chemo agent delivery. However, the potential toxicity and unclear internal metabolism of most nano-carriers was still a major obstacle for the clinical application. Herein, a novel "core‒shell" co-assembly carrier-free nanosystem was constructed based on natural sources of ursolic acid (UA) and polyphenol (EGCG) with the EpCAM-aptamer modification for hepatocellular carcinoma (HCC) synergistic treatment. As the nature products derived from food-plant, UA and EGCG had good anticancer activities and low toxicity. With the simple and "green" method, the nanodrugs had the advantages of good stability, pH-responsive and strong penetration of tumor tissues, which was expected to increase tumor cellular uptake, long circulation and effectively avoid the potential defects of traditional carriers. The nanocomplex exhibited the low cytotoxicity in the normal cells