Objective To analyze the CT and MRI features of pancreatic serous micro-cystic cystadenoma (SMCA).Methods CT and MRI data of 17 patients with SMCA confirmed by pathology were analyzed retrospectively.Tumor's location,diameter,septation,contrast-enhancement features,calcification,central scar, and the extent of pancreaticobiliary duct dilatation were recorded.Results Seventeen patients were enrolled.10 underwent CT,6 underwent MR(2 patients also underwent MRCP), and 1 underwent both CT and MR.Tumors were located at pancreatic head in 2 cases,neck in 2 cases,and body/tail in 13 cases.Lesion size ranged from 1.7 cm to 14 cm with an average of 5.2 cm.Septation was seen in 16 cases.Central scar was seen in 9 cases Septation and scar were enhanced and cystic component was not enhanced on contrast enhancement.6 patients presented the main pancreaticduct dilation.Conclusion Pancreas SMCA has certain imaging features.It is always manifested as lobulated mass with multiple small capsules(<2 cm) and fiber separations.The fiber separation enhance significantly,but lower than normal pancreatic tissue.Central scar is the characteristic manifestation of SMCA, and it manifests iso or slightly lower signal on T1WI and T2WI.Typical SMCA can be diagnosed according to the CT and MR imaging manifestations.

Objective To investigate the relationship between leptin level of IGR patients and intima-media thickness (IMT) of carotid arterial. Methods One hundred and eighteen IGR patents were enrolled into the following three groups according to the result of oral glucose tolerance test (OGTT): 38 cases of the purely impaired fasting glucose (IFG) group, 42 cases of the purely impaired glucose tolerance (IGT) group and 42 cases of the IFG combining with IGT (IFG + IGT) group. Thirty-eight cases with normol glucose tolerance (NGR) were enrolled in the NGR group. The blood fat, fasting blood-glucose (FBG), fasting insulin (insulin), fasting C peptide , 2 h-postprandial blood glucose , 2 h-insulin , 2 h-C peptide , glycosylated hemoglobin (HbA1C), C-reactive protein (CRP), body mass index (BMI), leptin and IMT were determined in patients of the three groups and the healthy controls. The multiple linear regression was used to analyze the relationship between leptin level and IMT , and person correlation was further used to analyze the affinity degree between leptin level and IMT. Results Compared with the NGT group, the inter-group comparison showed that leptin level was significantly increased in the IFG, IGT and (IFG + IGT) groups (P < 0.05, respectively). Compared with the IFG and IGT groups, IMT and the leptin level were increased in the (IFG + IGT) group (P < 0.05, respectively). The multiple linear regression analysis showed that leptin level was correlated with the increase of IMT in the (IFG + IGT) group (P < 0.05), but not in the IFT group and the IGT group. Conclusion The leptin level in the IGR group and the IMT in the IFG + IGT ) group were significantly increased , the leptin level was closely associated with IMT.

Objective To study the perfusion imaging features of renal cell cancer(RCC) and their correlation with microvessel density(MVD) and vascular endothelial growth factor(VEGF) ex-pression status. Methods Dynamic contrast-enhanced multislice spiral CT was performed preopera-tively in 73 cases with histologically proven RCC (65 cases of clear cell carcinoma, 3 of papillary ade-nocarcinoma, and 5 of chromophobic carcinoma). Blood volume (BV), blood flow (BF), mean transit time (MTT), and permeability surface area product (PS) of tumors were recorded. MVD and VEGF expression status were studied by immunohistochemial staining. Results The mean BV, BF, MTT negative in 35 (47.9 %) cases, slightly positive in 24 (32.9 %) cases, moderate positive in 10 (13.7 %) cases, and intensively positive in 4 (5.5 %) cases. MVD of RCC was positively correlated with BV, BF and PS (P<0.01),and negatively correlated with MTT (P<0.05). No relationship was found be-tween the expression of VEGF and perfusion CT parameters. Conclusion Perfusion CT scan is use-ful to evaluate the angiogenesis status of RCC.

Objective To evaluate vascular endothelial growth factor (VEGF) expression and micro-vascular density (MVD),and their clinicopathological significance in clear cell renal carcinoma (CCRCC).Methods Immunohistochemistry method was used to examine the expression of VEGF.CD34 staining endo-thelial cells were applied to measure the MVD.Results Sixty-six cases of CCRCC were collected.VEGF ex-pressions in 36(54.5%) cases were positive.No significant relationship was detected between VEGF expres-sion and clinicopathological parameters.The MVD value was 12-96.3.The levels of MVD were significantly lower in advanced TNM staging (P=0.000),high grading (P=0.005) and metastasized tumors (P=0.011).In larger tumors,the cases of MVD 50(26.7%) were much less than those of MVD <50 (73.3%).There was no significant relationship between the expression of VEGF and MVD,and neither of them was correlated with the renal capsule infiltration.Conclusion The overexpression of VEGF in CCRCC shows that it may be the target molecule for treatment.The value of MVD is inversely correlated with the grad-ing and staging of CCRCC,indicating its significance in the prognosis assessment of CCRCC.

Objective To evaluate the diagnosis and treatment of duodenal neuroendocrine tumors.Method We retrospectively analyzed data of 15 patients with duodenal neuroendocrine tumors admitted between August 1999 and July 2012.Result In all the 15 cases accurate and definitive diagnosis were achieved via pathological examination and immunohistochemistry.Clinical diagnostic methods included ultrasound,endoscopy,upper gastrointestinal imaging,abdominal CT,MRI,etc.7 cases underwent pancreaticoduodenectomy,2 cases were treated by local excision,4 cases by endoscopic excision,and total gastrectomy and distal gastrectomy was performed in one each case.Conclusions The diagnosis of duodenal neuroendocrine tumors is established mainly by endoscopy and diagnostic imaging.Surgical resection is the treatment of choice.Pancreatoduodenectomy and local excision is applicable for G2 and G3 patients while endoscopic excision can be used for G1 patients.

Auxotrophic strains of N1-37 (Phe-) and N2-27 (His-), screened from mutations of Paenibacillus polymyxa JSa-9 previously, were used as the parent strains to screen high-producing LI-F antibacterial lipopeptide fusion strain through protoplast fusion with polyethylene glycol as a promote agent. Fusion strain F5-15 was obtained. Then the product of LI-F antibacterial lipopeptide was quantified by HPLC, and the difference of expression of the key genes of lipopeptide synthase between wild strain JSa-9 and the fusion strain was analyzed by real-time PCR. LI-F antibacterial lipopeptide yield of the fusion strain F5-15 was 3.1-fold of the original strain JSa9's, and the expression levels of the target genes were 10.48, 2.48, 2.1 and 11.8 fold of the initial strain JSa-9, respectively.
Anti-Bacterial Agents ; biosynthesis ; Chromatography, High Pressure Liquid ; Lipopeptides ; biosynthesis ; Paenibacillus ; metabolism ; Protoplasts ; metabolism ; Real-Time Polymerase Chain Reaction

Objective:To explore the application effect of optimizing diet management in patients with hyperphosphatemia.Methods:Seventy-seven patients who underwent regular hemodialysis in the blood purification department of the First Affiliated Hospital of Guangxi Medical University from September 2018 to June 2019 were selected. Patients were randomly divided into control group (39 cases) and intervention group (38 cases) by the method of random number table. The control group received routine nursing, while the intervention group received optimized dietary management intervention. The blood phosphorus, blood calcium, hemoglobin, albumin, dietary phosphorus related knowledge level and phosphorus control diet compliance of the two groups before and after the intervention were compared respectively.Results:After 3 months of intervention, the scores of knowledge about food phosphorus, compliance of phosphorus control diet and total score of the intervention group were (22.00±3.92), (34.82±4.69) and (56.82±7.48) points, which were higher than (18.46±3.57), (30.54±3.52) and (49.00±6.13) points of the control group, the difference was statistically significant ( tvalues were 4.146, 4.536 and 5.022, P<0.05). After 6 months of intervention, the scores of knowledge about food phosphorus, compliance of phosphorus control diet and total score of the intervention group were (25.74±3.36), (41.63±5.27) and (67.37±7.67) points, which were higher than (20.97±3.81), (32.36±4.38) and (53.33±6.80) points of the control group, the difference was statistically significant ( tvalues were 5.815, 8.403 and 8.504, P<0.05). After 3 months of intervention, the blood phosphorus level in the intervention group was 1.81 (1.67, 2.10) mmol/L, which was lower than 2.13 (1.87, 2.32) mmol/L in the control group, the difference was statistically significant ( Zvalue was-3.237, P<0.05). After 6 months of intervention, the blood phosphorus level in the intervention group was 1.75 (1.63, 1.91) mmol/L, which was lower than that in the control group 1.90 (1.83, 2.13) mmol/L, and the difference was statistically significant ( Zvalue was-3.343, P<0.01). Conclusion:Optimizing dietary management can improve patients' knowledge level of food phosphorus and dietary compliance of phosphorus control, effectively reduce blood phosphorus level, and have no obvious effect on nutritional status.

Purpose To investigate the positive rate and concordance rate of BRAF mutation in papillary thyroid carcinoma detected by real-time PCR method and Sanger sequencing. Methods 312 papillary thyroid carcinomas patients were enrolled in this study. Real-time PCR method and Sanger sequencing were performed to detect BRAF gene mutations. The frequency of BRAF mutation and the concordance of two methods were analyzed. Results BRAF mutation was detected in 65. 4% (204/312) and 63. 8% (199/312) of 312 papillary thyroid carcinoma samples by using real-time PCR method and Sanger sequencing, respectively. There was no significant correlation between BRAF gene mutations and patients’ gender. There was significant correlation between BRAF gene mutations and patients’ age. The overall concordance between real-time PCR method and Sanger sequencing for BRAF mutation detection was 98. 4%. Conclusion Real-time PCR method provides an effective method in BRAF gene mutation detection.

Exosomes are small vesicles with a diameter of about 40-160 nm actively secreted by cells. They participate in a variety of pathophysiological processes and are closely related to the occurrence and development of diseases. As a newly carrier of intercellular communication and circulating biomarkers of disease diagnosis and prognosis, exosomes have attracted great attention for their potential clinical applications. However, many aspects such as exosome biogenesis, targeted transport, and mechanism of action are still unclear. This paper focuses on the exosome biogenesis, summarizes the exosome biogenesis pathways, and describes relevant molecular modulation mechanisms of importance. And this review provides a theoretical basis for disease treatment based on regulating exosome production.

Objective To investigate the predictive value of depth of invasion (DOI) of tongue squamous cell carcinoma (TSCC) for cervical lymph node metastasis and prognosis. Methods We retrospectively analyzed the clinical and pathological data of 73 patients with T_1/2 TSCC. ROC curve was used to determine the optimal cut-off value of DOI for predicting cervical lymph node metastasis, and logistic regression analysis was performed to analyze the related factors affecting cervical lymph node metastasis of TSCC. Kaplan-Meier method and Cox regression analysis were used for survival analysis. Results Among 73 patients, 18 patients were with lymph node metastasis and 55 patients were without lymph node metastasis. The median DOI with and without lymph node metastasis were 8.00 and 5.00 mm, respectively (P=0.003). The optimal cut-off value for DOI was 6.15 mm, with AUC 0.75 (95%CI: 64.1%~87.1%, P=0.001), sensitivity 77.8% and specificity 63.6%. DOI and pathological differentiation were independent prognostic factors for cervical lymph node metastasis in multivariate analysis. DOI, nerve invasion and pathological differentiation were independent prognostic factors of survival in Cox regression analysis. Conclusion DOI of TSCC patients has important predictive value for both cervical lymph node metastasis and prognosis. Neck lymph node dissection is recommended for patients with DOI > 6.15 mm to improve survival rate and reduce recurrence rate.