Particulate matter is one of the important factors that have adverse effects on human health. It is generally known that the fine particles are more toxic than coarse ones, but some researchers have different opinion. Based on the analysis of the opinions, the factors that may influence the adverse effects of particulate matter on human health, including surface characteristics and adsorbed components, were discussed in the present paper. This paper will be helpful for the assessment of the toxicity of particulate matter.

Objective To evaluated the correlations between MSCT features and expression of VEGF-C,lymphatic vessel density (LVD)in gastric carcinoma.Methods Both plain MSCT and triphasic dynamic contrast-enhanced scan were performed in 58 patients with gastric carcinoma.All patients underwent total/subtotal gastrectomy after MSCT scanning.All specimens were collected into liquid nitrogen or deep freeze refrigerator.Detection procedure for VEGF-C mRNA was performed using RT-PCR,and the LVD was detected with 5’-nucleotidase (5’-Nase)histochemistry.Results The VEGF-C positive rate and the LVD in tumor tissue were high-er than those in normal tissue (P < 0.05 ).In the tumors between diffused and intestinal groups and between non-metastasis and lymph node metastasis groups,the VEGF-C positive rate was 87.1% and 59.3%,87.8% and 41.2%,and the LVD was 8.04±4.58 and 4.08±2.44,8.50±4.70 and 3.64 ± 1.41,respectively,indicating statistically significant differences (P <0.05 ).Conclusion Over-expression of VEGF-C and higher LVD are closely correlated with the lymph node metastasis and Lauren types of MSCT fea-tures of gastric carcinoma.VEGF-C can promote the lymphangiogenesis in carcinoma and further lymph metastasis.

Objective To explore the characteristics and risk factors of type 2 diabetes mellitus (T2DM) onset in pedigrees. Methods A total of 865 subjects were screened and diagnosed by oral glucose tolerance test (OGTT) based on American Diabetes Association (ADA) criteria. Type 1 diabetes mellitus (T1DM) , maturity onset diabetes of the young (MODY) and chondriosome diabetes were excluded by clinical features and laboratory test of insulin and autoantibodies including glutamic acid decarboxylase antibody, insular cellular antibody and insulin autoantibody. A total of 182 pedigrees of T2DM were obtained. Results No gender difference was found in the prevalence of T2DM (42. 59% in male and 48. 18% in female respectively, P ＞0. 05) , nor was the newly diagnosed rate(9. 89% in male and 11. 82%in female, P ＞ 0. 05). The onset age was (63. 3 ± 12. 4) years old in the first generation [(64. 4 ± 12. 5)years in male and (62. 3 ± 10. 3) years in female] , (47. 1 ± 8. 7) years old in the second generation [(48. 2 ±9. 3)years in male and (46. 1 ± 8. 1) years in female] , (29. 6 ± 10. 2) years old in the third generation [(28. 9 ±9. 5)years in male and (30. 0 ± 10. 4)years in female]. Compared with normal glucose tolerance (NGT) subjects , newly diagnosed T2DM and impaired glucose regulation (IGR) subjects had higher prevalence of hypertension, hyperlipidemia and smoking but less physical activities. Statistical differences were shown in body weight five years before diagnosis, one years before diagnosis and at diagnosis in newly diagnosed T2DM[(68. 4 ±12. 4)kg, (69. 5 ± 11. 0)kg and (69. 1 ±9. 6)kg] and IGR[(66. 1 ±10.7)kg, (65.9 ± 10.7) kg and(65.7 ± 10.4) kg] , when compared with NGT [(61.0 ± 10.2) kg,(59. 5 ±11.0) kg and (60. 1 ± 10. 4) kg, all P ＜ 0. 05] . The same results were obtained with waist circumference and waist-hip ratio [(4. 1 ± 12. 5) cm and 0. 92 ± 0. 36 in newly diagnosed T2DM while (89. 1 ± 10. 7) cm and 0. 90 ± 0. 64 in IGR] , when compared with NGT[(82. 5 ± 10. 1) cm and 0. 82 ±0. 25] , all P ＜0. 05. Conclusions No gender difference was found in the onset characteristics of T2DM.High prevalence of obesity, hypertension, hyperlipidemia and smoking with less physical activities were associated with T2DM.

Objective To investigate the effects of hyperbaric oxygen preconditioning (HBOP) on brain edema, inflammatory reaction and neuronal cell apoptosis induced by experimental hemorrhage in rats. Method Eighteen male Spraque-Dawley rats, weighing 300 - 350 g,received five successive sessions of HBOP with 3 atmosphere absolute pressure and 100% O2 one hour daily for five successive days, and other eighteen rats received five successive sessions of pretreatment with one atmosphere absolute pressure, air, one hour daily for five successive days. Twenty-four hours after the final pre-conditioning, rats received an infusion of 100 μL autologous blood into the basal ganglion. Seventy-two hours later, rats were sacrificed for brain edema measurements in 12 rats of each group. The histopathological changes around the hematoma were observed microscopically, and the neuronal cell apoptosis was detected by using the terminal deoxynucleotidyl transferase-mediated nick end labeling (TUNEL) in six rats of each group. Data of brain water content were analyzed by using Stata 7.0 software and statistical analysis was carried out by two-tailed Student t -test. Results Compared with the control group, HBOP significantly attenuated brain edema 72 hours after intra-cerebral hemorrhage in experimental rats (81. 6± 0. 7% vs. 82. 8± 0.9%, P < 0.01). Inflammatory cell infiltration and neuronal cell apoptosis were also significantly decreased in the HBOP group. Conclusions HBOP protects the rats against brain edema formation, and quells inflammatory reaction and neuronal cell apoptosis following intra-cerebral hemorrhage in experimental rats.

Objective To investigate the clinical efficacy and safety of the high-intensity focused ultrasound therapy in patients with colorectal liver metastases. Methods 28colorectal lesions in 16 patients with liver metastases after HIFU treatment lines observed patient vital signs,the main organ,imaging studies (CT or MRI,etc. ) ,complications and prognosis of cancer cases. Results All patients with stable vital signs after treatment, liver, kidney function was normal,6-month follow up, six more than 80% reduced lesion size,lesion size decreased in 18 of 30% to 50% ,4tumor volume did not change significantly; 16 patients, 1 patient was lost. 15 cases were followed uPfor 6 to 24 months,5 patients were transferred because of lesions disseminated in death within 6 months after surgery, calculated with the Kaplan-Meier median survival time was 13 months; 1 patient skin burning streak marks, healed after 1 week after treatment. 1 patient treatment areas of the chest skin, mild subcutaneous edema. Conclusion The treatment of patients with liver metastasis of colon cancer lesions was a non-invasive, safe and effective treatment.

Objective To further investigate the accuracy of the real-time three-dimensional echocardiography(RT-3DE) in evaluating right ventricular(RV) systolic function.Methods RT-3DE,MRI and SPECT were used to study a total 30 patients including 10 with coronary artery disease,7 with hypertension,5 with cardiomyopathy,5 with atrial septal defect,and 3 with pulmonary hypertension.The RV end-diastolic volume(RVEDV),RV end-systolic volume(RVESV),RV stroke volume(RVSV) and RV ejection fraction(RVEF) were measured.The correlation and the difference between different modalities were compared.Results RT-3DE had a good correlation with MRI in RVEDV,RVESV,RVSV and RVEF (rEDV =0.811,rESV =0.837,rSV =0.818,and rEF =0.701).Also RT-3DE had a correlation with SPECT in RVEDV,RVESV,and RVSV(rEDV =0.526,rESV =0.493,rSV =0.514),but there was no correlation between RT-3DE and SPECT in RVEF (rEF =0.235).Conclusions RT-3DE can assess RV systolic function accurately.

Objective:To established a modified implanting model of VX2 liver tumor in rabbit on the base of the classic implanting method, and compared the results within the two methods. Methods:30 rabbits with the mean weight of (2.65?0.29)kg were divided randomly into two groups with 15 rabbits each. The rabbits in Group A received classic implantation for induction of the liver tumor model, and Group B were inducted by injecting a piece of tumor tissue into the left anterior lobes of liver. Implanting time of each group was recorded and compared, and spiral CT scan was performed at 8th day, 15th day, 22nd day, 29th day postoperatively. The manifestation of tumors in CT scan was observed and tumor volume was calculated simultaneously with formula V=1/2ab2 (a=the shortest diameter and b=the longest diameter).Each tumor was confirmed through pathology. Results:The implanting time of Group A and Group B were (9.47?2.85)min and (5.85?1.62)min, respectively, with significant difference between them. Besides, there was statistical difference of the achievement ratio between two groups, as it was 53.3% for Group A and 86.7% for Group B. No significant difference was found for the tumor growth between two groups. Conclusion:Modified implanting method for induction of the rabbit liver tumor model was superior to the classic implanting method.

ObjectiveTo explore the ideal minimally invasive surgical method for degenerative lumbar spine stenosis.MethodsFrom March 2008 to August 2010,73 cases with lumbar spinal stenosis underwent minimal invasive surgery were retrospectively analyzed.The patients were divided into different groups by clinical features,imaging manifestations,and concurrent diseases.The minimal invasive surgical methods were chosen according to the classification.Operation time,intra-operative bleeding,and complications were recorded.The lumbar function was evaluated by Oswestry disability index (ODI),and the clinical results were assessed by JOA pre- and postoperatively.ResultsMinimal invasive surgery was completed in all cases,which included 25 cases with bilateral decompression and 48 cases with unilateral approach for bilateral decompression.Twenty-three cases used interbody fusion and percutaneous pedicle screw fixation after decompression.Intraoperative blood loss and operation time were related to surgical methods.One case was complicated with dural tear.Cage was inserted into upper vertebral body during interbody fusion in 1case with osteoporosis,removed the cage and implanted bone fusion.Incisions of 3 cases were poor healing after surgery.The average follow up time was 13 months(range,10-35).JOA score and ODI before surgery were 9.2±5.1 and 62.3％±18.5％ respectively; while 6 months after surgery,JOA score and ODI were 23.5±7.2 and 18.4％±6.4％ respectively.JOA score and ODI showed statistically significant improvements after operation(P＜0.01).Twenty-two cases got solid fusion at the final follow-up.ConclusionTreatment of lumbar spinal stenosis by minimal invasive surgery has satisfactory surgical outcomes,but the proper minimal invasive strategy should be chosen according to specific patients,surgeons and hospitals.

OBJECTIVETo investigate the preoperative risk factors of portal venous thrombosis (PVT) after splenectomy and gastric pericardial devascularization in patients with liver cirrhosis and portal hypertension.

METHODSClinical data was collected for 127 patients who underwent splenectomy and gastric pericardial devascularization for portal hypertension at our hospital between January 2010 and December 2012.The patient data were analyzed retrospectively according to patient status of presence or absence of PVT postoperatively.The preoperative risk factors of PVT were statistically analyzed.

RESULTSThere were no significant differences between the postoperative PVT-positive and-negative groups in regards to sex, age, receipt of emergency surgery, presence of ascites, admission to hospital for upper gastrointestinal bleeding, grade of esophageal-gastric varices, Child-Pugh classification, spleen vein diameter, liver function (as determined by levels of alanine aminotransferase, total bilirubin, direct bilirubin, albumin, globulin, cholinesterase, and gamma-glutamyltransferase), renal function (as determined by creatinine level), and coagulation function (as determined by prothrombin time, prothrombin activity degree, activated partial thromboplastin time, international normalized ratio, fibrinogen, thrombin time, and antithrombin III).However, there were significant differences between the groups for the parameters of postoperative PVT presence, upper gastric bleeding history, aspartate aminotransferase level, and blood urea nitrogen level (all P less than 0.05).Portal vein diameter and history of upper gastric bleeding were both identified as independent risk factors for PVT (P less than 0.05).Incidence of postoperative PVT was higher in patients who had portal vein diameter > 13.15 mm (cutoff value of 13.75 mm) and in patients who had a history of upper gastric bleeding.

CONCLUSIONPortal vein diameter and history of upper gastric bleeding were independent risk factors for PVT occurrence after splenectomy and gastric pericardial devascularization in patients with liver cirrhosis and portal hypertension.

Antithrombin III ; Esophageal and Gastric Varices ; Gastrointestinal Hemorrhage ; Humans ; Hypertension, Portal ; surgery ; Incidence ; Liver Cirrhosis ; Portal Vein ; Retrospective Studies ; Risk Factors ; Splenectomy ; Stomach ; blood supply ; surgery ; Venous Thrombosis ; epidemiology ; etiology ; gamma-Glutamyltransferase

Objective To explore whether MiR-129-5p participates in radiosensitivity of medullary thyroid cell MZ-CRC-1 by inhibiting the gene expression of high mobility group protein B1 ( HMGB1) . Methods The radioresistant cell line MZ-CRC-1/R was established from MZ-CRC-1. Cell survival fraction was analyzed by colony formation assay. The expressions of miR-129-5p in MZ-CRC-1 and MZ-CRC-1/R cells were detected by qRT-PCR. Cell viability was determined by MTT assay. Cell apoptosis was measured by flow cytometry. Dual-luciferase reporter assay was performed to confirm the relationship between miR-129-5p and HMGB1. Besides, the protein expressions of HMGB1 and p-AKt were evaluated by western blot. Results Compared with that of MZ-CRC-1 cells, the survival fraction of MZ-CRC-1/R cells was significantly increased (t=3. 038, 4. 330, 4. 885, 4. 568, P<0. 05), the cell viability of MZ-CRC-1/R cells was also increased ( t=3. 637, 7. 734, 11. 896, 14. 522, P<0. 05) , and the expression of miR-129-5p(0.26±0.03) was significantly decreased in MZ-CRC-1/R cells(1.00±0.06) (t=19. 107, P<0. 05) . Compared with miR-NC-inhibitor group, cell viability was promoted and cell apoptosis was blocked in the miR-129-5p-inhibitor group ( t=5. 156, 6. 005, 9. 649, 8. 659, P<0. 05) . Moreover, miR-129-5p mimic suppressed cell viability and enhanced cell apoptosis after irradiation ( t=3. 118, 5. 034, 6. 005, 7. 488, 6. 362, P<0. 05) . Overexpression of miR-129-5p inhibited the protein expressions of HMGB1 and p-AKt (t=9. 325, 10. 614, P<0. 05). In addition, HMGB1 depletion rescued cell apoptosis that was reduced by miR-129-5p inhibitor in MZ-CRC-1 cells ( t=6. 700, P<0. 05) , while HMGB1 overexpression attenuated the effect of miR-129-5p upregulation on MZ-CRC-1/R cells ( t=7. 073,P<0. 05) . Conclusions miR-129-5p increased the radiosensitivity of medullary thyroid-like cell MZ-CRC-1 by inhibiting HMGB1.