Adolescent ; Adult ; Female ; Health Care Surveys ; Health Status ; Humans ; Male ; Medical Waste Disposal ; Middle Aged ; Occupational Health ; Personnel, Hospital ; Young Adult

Objectives: To investigate the effects of adhesion and proliferation of bone mesenchymal stem cells (BMSCs) in the surface of lactic acid/glycolic acid/asparagic acid-co-polyethylene glycol PLGA-[ASP-PEG] tri-block polymer scaffolds, try to find a new biomaterial to induce seed cells in vitro for bone tissue engineering. Methods: Modified PLGA with polyethylene glycol (PEG) and asparagic acid (ASP) that has many ligands, and synthesis PLGA-[ASP-PEG] polymer material. BMSCs were cultured in PLGA-[ASP-PEG] polymer material and PLGA used as control group. Through precipitation method, MTT assay and total cellular protein detection to test the adhersion and proliferation of BMSCs. Scanning electron microscope is used to observe cells appearance. Results: BMSCs on the surface of PLGA-[ASP-PEG] polymer scaffolds are adherention to the culture flask, the number of cells is much higher than PLGA’s. The precipitation method suggest that adhesion and proliferation of BMSCs on the surface of PLGA-[ASP-PEG] is much higher than the control group(P

Objective To investigate the relationship of the lymphangiogenesis and lymphatic metastasis by observing the expression of proliferating cell nuclear antigen in the hamster tongue cancer development and analyzing the correlations of lymph vessel density (LVD), lymphatic vessel area (LVA) and malignance or lymphatic metastasis of tongue cancer cells. Methods Forty_two hamster tongue cancer models were induced by painting 1.5% 7,12-dimethylben(a) anthracene (DMBA) acetone solution after scratching, 7 models were sacrificed every two weeks. The pathological changes of tongue cancer were determined by the HE staining. The lymphatic hyperplasia was determined by PCNA and Desmoplakin(DP I +Ⅱ) Immunohistochemical double staining. The tumors and lymphatic endothelial cell proliferation index (proliferation index, PI), lymphatic vessel density (LVD) and lymphatic vessel area (LVA) were measured and statistically analyzed. Results The oncogenesis of tongue was divided into three stages: atypical hyperplasia, carcinoma in situ and early invasive stage;atypical hyperplasia group:PI (91.55), LVA (7570.23), LVD (2.50);carcinoma in situ group: PI (113.36), LVA (12105.45), LVD (3.73);early invasive group: PI (124.67), LVA (14524.33), LVD (5.33). The PI, LVA and LVD were compared among groups above (P<0.05), and the correlation of PI with LVA and LVD was positive (P<0.05);Lymphatic metastasis group:PI (130.50), LVA (15430.67), LVD (6.17), non lymphatic metastasis group:PI (113), LVA (12711.67), LVD (3.67), the PI, LVA and LVD were compared between the two groups above (P<0.05).Conclusion With the development of hamster tongue cancer, lymphatic endothelial cell proliferation activity increased, suggesting that the lymphangiogenesis existed in the tongue carcinogenesis process;the values of the LVD and LVA increased in the hamster tongue cancer development, which was positively correlated with the cancer cell malignance and lymphatic metastasis.

Objective To investigate the morphological charcteristics of compressive fractures in different spinal segments．Methods 412 cases of patients with 448 wedge and burst thoracic and lumbar fractures were analysed for comparison of the incidence of wedge and burst fractures in different segments，and to calculate compression rate of anterior height of verterbral body to posterior height for burst fracture in every segment．Results The incidence of wedge fractures in the middle and lower thoracic spine was comparatively high while during the occurrence of burst fractures in the thoracic segments the ratio between the compression ratio of the anterior and posterior height is comparatively high．In the lumbar spine，especially in the lower lumbar，the incidence of burst fractures was higher than other segments．The compression ratio for burst fracture in the middle and lower thoracic spine was bigger while the compression rate for wedge fracture in the lumbar spine，especially in the lower lumbar in comparison with the thoracic segments，was smaller． Conclusion Besides the external violence force and the posture of the patient at the moment of injury，the type or morphologic characteristics of spine fracture is also related to the spinal segments where the fractures take place．

BACKGROUNDAlthough the onset of anemia during infectious disease is commonly correlated with production of inflammatory cytokines, the mechanisms by which cytokines induce anemia are poorly defined. This study focused on the mechanism research.

METHODSDifferent types of mice were infected perorally with Toxoplasma gondii strain ME49. At the indicated times, samples from each mouse were harvested, processed, and analyzed individually. Blood samples were analyzed using a Coulter Counter and red blood cell (RBC) survival was measured by biotinylation. Levels of tumor necrosis factor-α (TNF-α), inducible nitric oxide synthase (iNOS), and inducible protein 10 (IP-10) mRNA in liver tissue were measured by real-time polymerase chain reaction.

RESULTST. gondii-infected mice exhibited anemia due to a decrease in both erythropoiesis and survival time of RBC in the circulation (P < 0.02). In addition, infection-stimulated anemia was associated with fecal occult, supporting previous literature that hemorrhage is a consequence of T. gondii infection in mice. Infection-induced anemia was abolished in interferon gamma (IFNγ) and IFNγ receptor deficient mice (P < 0.05) but was still evident in mice lacking TNF-α, iNOS, phagocyte NADPH oxidase or IP-10 (P < 0.02). Neither signal transducer and activator of transcription 1 (STAT1) deficient mice nor 129S6 controls exhibited decreased erythropoiesis, but rather suffered from an anemia resulting solely from increased loss of circulating RBC.

CONCLUSIONSInfection-stimulated decrease in erythropoiesis and losses of RBC have distinct mechanistic bases. These results show that during T. gondii infection, IFNγ is responsible for an anemia that results from both a decrease in erythropoiesis and a STAT1 independent loss of circulating RBC.

Anemia ; genetics ; metabolism ; Animals ; Erythrocytes ; pathology ; Interferon-gamma ; metabolism ; Male ; Mice ; Mice, Knockout ; Nitric Oxide Synthase Type II ; genetics ; metabolism ; Receptors, Interferon ; genetics ; metabolism ; STAT1 Transcription Factor ; genetics ; metabolism ; Toxoplasma ; pathogenicity ; Tumor Necrosis Factor-alpha ; genetics ; metabolism

Objective To investigate the relationship between serum HBeAg level and inflammation grade (G)/fibrosis stage (S) in the liver tissues of chronic hepatitis B (CHB) patients in the immune clearance phase (IC). Methods Both liver biopsy samples and serum samples were consecutively collected from CHB patients in Liver Center,First Affiliated Hospital,Fujian Medical University during March 2007 to June 2010.Electro-chemiluminescence and fluorogenic quantitative polymerase chain reaction (PCR) methods were used to determine HBeAg titer and hepatitis B virus (HBV) DNA level,respectively.The relationships between HBeAg titer and liver pathological stages were analyzed using Spearman rank correlation analysis.Receive operating characteristic (ROC) curve was used to evaluate the diagnostic value of HBeAg for liver pathological stages.Results Totally 249 patients with CHB were enrolled into this study.The serum HBeAg absorbances in patients with liver inflammation G1 to G4 were (2.93±2.85),(2.96±2.74),(2.69±2.67) and (2.30±2.41) lg s/co,respectively,while those in patients with liver fibrosis S1 to S4 were (2.99±2.74),(2.89±2.73),(2.58±2.55) and (2.32±2.44) lg s/co,respectively,which indicated that serum HBeAg titers were significant different in patients with different grading and staging of liver tissues (x2 =47.13,P＜0.01; x2 =74.12,P＜0.01).Spearman rank correlation analysis showed that serum HBeAg titer was negatively correlated with inflammation grades and fibrosis stages of liver tissues (r=-0.418 and-0.532,respectively; both P＜0.01).ROC curve analysis revealed that the areas under the curve (AUC) were 0.74 (G≥≥3) and 0.73 (G≥4),and the HBeAg (s/co) cut-off values were 2.95 and 2.64 lg s/co,respectively.Similarly,ROC curve analysis revealed that the AUC were 0.80 (S≥3) and 0.77 S≥4),and the HBeAg cut-off values were 2.99 and 2.82 lg s/co,respectively.Conclusions The serum HBeAg titer is negatively correlated with the inflammation grades and fibrosis stages m liver tissues of CHB patients in IC phase.The level of HBeAg may be used as an adjunctive noninvasive marker to reflect the inflammation and fibrosis status in the liver.

Objective To investigate the relationship between levels of ceruloplasmin (CP) and inflammation grade,fibrosis stages in liver of patients with chronic hepatitis B (CHB),and to establish liver fibrosis non-invasive model and evaluate its diagnostic value for liver pathological stages.Methods Both liver biopsy samples and sera were collected from 148 consecutive CHB patients in Liver Center,First Affiliated Hospital,Fujian Medical University during January 2009 to June 2011.The relationships between CP and liver pathological stages were analyzed using Spearman rank correlation analysis.Receiver operator characteristic (ROC) curve was used to evaluate the diagnostic value of CP for liver pathological stages.The diagnostic values of relevant indicators were analyzed by Logistic regression.The liver pathology-predicting model was built and the diagnostic value of the model was analyzed by ROC curve.Results The mean values of CP in 148 CHB patients with liver inflammation grades of G1 to G4 were (212.5 ± 34.9),(205.5± 32.0),(201.4 ± 37.7) and (172.8 ± 20.4) mg/L,respectively,which were significantly different by ANOVA test (F=6.309,P＜0.01).Similarly,the mean values of CP in patients with liver fibrosis stages of S1 to S4 were (217.4±32.3),(206.0±37.7),(194.2±29.8) and (179.7±30.4) mg/L,respectively,which were significantly different by ANOVA test (F =8.608,P ＜ 0.01).Spearman rank correlation analysis showed that CP was negatively correlated with liver inflammation grades (r=-0.316,P＜0.01) and fibrosis stages (r=-0.404,P＜0.01).ROC curve analysis revealed that the area under the curves (AUC) were 0.71 (S≥2),0.70 (S≥3) and 0.72 (S=4).Multiple Logistic regression analysis showed that CP,α-fetoprotein,cholesterol,platelet and age were independent predictors for liver fibrosis.ROC curve analysis revealed that AUC were 0.84 in model-1 (S≥2),0.83 in model-2 (S≥3) and 0.87 in model-3 (S=4).The accuracy rates were 71.8％,80.3％ and 79.2％,respectively.Conclusions The CP levels are negatively correlated with inflammation grades and fibrosis stages in the liver of CHB patients.CP could be an important non-invasive indicator for liver fibrosis and the model including CP can be used to predict liver fibrosis in CHB.

Objective To compare the imaging characteristics of multiple sclerosis (MS) and neuromyelitis optica (NMO) for better diagnosis and differential diagnosis.Methods The brain and spinal MRI images of 60 MS and 48 NMO cases were retrospectively reviewed.The imaging characteristics including the predilection site,morphological features,enhancement manifestations were summarized.All data was analyzed by using t test and Chi square test with SPSS 13.0.Results (1) The three top predilection sites of brain in head MRI of MS patients were periventricular white matter (34 cases in 60),subcortical white matter (27 cases in 60),brain stem (23 cases in 60).MS lesions also were found in basal ganglia,cerebellum,corpus callosum and thalamus,as well as cortex (9 cases in 60).By contrast,brain lesions were observed in 59.4％ (19/32) of NMO patients,and the three top predilection sites of NMO by turns were brain stem (13 cases in 19),periventricular white matter (12 cases in 19),subcortical white matter (7 cases in 19).Furthermore,the lesions surrounding third ventricle (6 cases in 19) and the tegmentum of brain stem near peri-aqueduct (8 cases in 19) in NMO were not found in patients of MS.The involvement of brain stem and thalamus was more frequent in NMO than in MS (x2 =5.267,6.004,P ＜0.05,respectively).(2) The lesions of spinal cord in MS patients were typically oval,peripheral,and asymmetric,but in NMO patients they were longitudinally extensive and centrally located.The mean number of involved vertebral segments in NMO patients was significantly more than that in MS patients (7.3 vs 2.2,t =-9.288,P ＜ 0.01).Furthermore,the number of spinal cord lesions in MS patients was remarkably more than that in NMO (2.0 vs 1.3,t =4.565,P ＜0.01).The ratios of occurrence of spinal cord swelling and distension of NMO patients was 58.3％ (28/48),which was significantly higher than 21.9％ in MS (7/32,x2 =10.370,P ＜0.01).(3)The enhancement pattern in MS was circular (7 cases in 42),oval (6 cases in 42) and irregular (4 cases in 42),while in NMO was mainly sheet-shaped with mild enhancement (5/11).The lesions of spinal cord showed in MS mainly manifested as oval enhancement (16 cases in 26) and linear enhancement (8 cases in 26),while in NMO lesions manifested as strand or mild linear enhancement (26 cases in 35).Conclusions NMO has several distinct imaging characteristics,which are helpful for differentiation from MS.

Objective To investigate the effect of L-selectin in experimental allergic encephalomyelitis (EAE) of Wistar rats.Methods The rats were randomly divided into four groups;the normal group,the CFA group, the LMS group and the model group;The animal models were established in rats by immunization with myelin basic protein of spinal cord of guinea pig and complete Freund's adjuvant(CFA).The symptom of EAE was observed; pathological feature and myelin of brain and spinal were detected with HE stain and Loyez's stain respectively.The number of positive vessels of L-selectin expression was detected by immunohistochemistry.Results 100% experimental Wistar rats treated with MBP and levamisole developed EAE,but none of the other groups.The number of positive vessels of L-selectin expression was (31.86 ± 1.39) in model group, obviously higher than that of in the normal group (1.38 ±0.18) ,the CFA group( 1.50 ±0.27) and the LMS group(7.25 ±0.59) (all P <0.05) ;The inflammation cells were found around vessels and demyelination were seen in white matter of brain and spinal cords.Conclusion The expression of L-selectin should play an important role in EAE.

BACKGROUND: As a micro-injurying and reduplicative treatment of osteoarthritis,the arthroscopic debridement has got the affirmation of numerous scholars. But as one of the standard procedures in artnroscopic debridement,synovectomy is called in question recently.OBJECTIVE: To explore the applied value of synovectomy in the arthroscopic debridement of osteoarthritis.DESIGN: Retrospective controlled analysis.SETTING: Department of Orthopaedics, Fushun Central Hospital.PARTICIPANTS: Sixty-five patients received synovectomy in the arthroscopic debridement of knee joint osteoarthritis in the Department of Orthopaedics,Fushun Central Hospital from February 1997 to December 2000.Thirty-two among them,with complete data and over 1 year's followup,were taken for synovectomy group. Forty-eight patients received the arthroscopic debridement of knee joint osteoarthritis without synovectomy in the Department of Orthopaedics,Fushun Central Hospital from January 2001 to November 2003.Thirty among them,with complete data and over 1 year's follow-up,were taken for control group.METHODS: Synovectomy was taken as the factor of intervention in the operation to perform grouping. The analysis of curative effect was performed to control with joint douching,corpus liberum removal,osteophyma cleaning,meniscus fitting,cartilage gouging,synovectomy and without synovectomy or part synovectomy. Lysholm evaluation standard of knee joint osteoarthritis was used to the knee joint functional evaluation beween preoperation and postoperative 1 year in two groups. And operative time,postoperative draining quantity,postoperative 7-day visual analog score,postoperative 1-year Lysholm score of knee joint, were recorded.MAIN OUTCOME MEASURES: Preoperative and postoperative 1-year Lysholm score of knee joint,operative time,postoperative draining quantity,postoperative 7-day visual analog score.RESULTS: Sixty-two patients were included and all of them entered the result analysis.The preoperative patients in two groups were comparable with each other and the differences of Lysholm score were not significant (t=0.127,P=0.899).The operative time was longer in synovectomy group than in control group,the differences were significant (t=9.547,P ＜ 0.001)and the postoperative draining quantity was more in synovectomy group.The postoperative visual analog score was bigger in synovectomy group than in control group and the differences were significant [the scores of synovectomy and control groups were respectively (4.6±1.1),(2.8±1.4),t=6.206,P ＜ 0.001].The differences of knee joint score in 1-year follow-up were not significant [the scores of synovectomy and control groups were respectively (77.6±11.9),(79.0± 10.3),t=0.562,P=0.576].CONCLUSION: Synovectomy can not increase the curative effect in the near future in the arthroscopic debridement of osteoarthritis. On the contrary,the operative time was longer,the operative wound was larger and postoperative reaction was more serious. It should not be used in the debridement generally.