Cognition ; Cognition Disorders ; Humans ; Manganese ; Occupational Exposure

0.05);the successful rate was 92.9 %.Conclusion Favorable results after 12~18 months of clinical service indicate that the DT light-post system can be an effective alternative to conventional cast post-and-core systems in the treatment of anterior esthetic prosthodontics.

Objective To analyze the clinical features and causes of benign paroxysmal positional vertigo(BPPV).Methods The clinical data of 521 patients with BPPV were collected.The percentage of patients with BPPV in all the outpatients with dizziness and vertigo,the clinical characteristics of BPPV,and the prevalence of comorbidity with migraine were analyzed.Results BPPV accounted for 35.7% of patients with vertigo and 12.1% of patients with dizziness.Among the 521 patients with BPPV,158(30.3%)were male and 363(69.7%)were female,with an average age of(57.5?12.8)years old(20 to 93 years old).Right semicircular canals were involved in 323 cases(62.0%),and left semicircular canals in 187 cases(35.9%).The latency period of nystagmus of vertical canals was(3.22?2.37)s,and time of persistence was(8.31?7.98)s.The latency period of nystagmus of horizontal canals was(2.33?1.50)s,and the time of persistence was(14.77?11.40)s.There were significant differences in the latency period of nystagmus and time of persistence between the vertical and horizontal canals(P=0.001 and P=0.000).Fifteen patients(2.9%)had a history of head trauma and 39(7.5%)were complicated with migraine.Conclusion BPPV is prevalent in patients with dizziness and vertigo,and misdiagnosis and missed diagnosis should be avoided.

Epithelial-Mesenchymal Transition ; Humans ; Sarcoma ; pathology

Objective To observe the clinical significance and laboratory diagnostic values of Pre-S1 antigens (Pre-S1)and its relativity to HBeAg and HBV-DNA after using interferon in association with kurarinone.Methods The content of Pre-S1 and HBV-M was detected by ELISA and the levels of HBV-DNA were detected by flores- cence quantitative PCR(FQ-PCR)in 100 serum samples of patients with HBV infection and patients after an antivi- ral treatment.Results Matched control in 50 serum of HBsAg-positive and detectable HBV-DNA cases,both 29 samples in 30 HBeAg-positive cases and 17 samples in 20 HBeAg-negative cases Pre-S1s were positive.Treatment set 50 serum of patients after taking two courses of an antiviral treatment for HBV infection,drawing blood to observe related markers,5 cases of effect set were turned into negative for serologic markers and virologic markers.19 cases of valid set,serologic markers were various and the HBV-DNA copies descended 2-3 orders of magnitude.26 cases of invalid set,serologic markers were not various,and 30 % samples of the HBV-DNA copies descended 1～2 orders of magnitude.Conclusion It was supplementary for Pre-S1 to indicate HBV expression when the HBeAg varied.It also provided detcctable laboratory markers in HBV infectivity,replication and therapeutic efficiency evaluation.

Objective To observe the effect of dexamethasone(Dex)on the proliferation and os- teogenic differentiation of human marrow stromal cells(MSCs)in vitro.Methods The primary human MSCs were isolated and cultured by Ficoll seperation culture in vitro.In subcultures,human MSCs were respectively treated with dexamethasone 10~(-9),10~(-8) and 10~(-7) mol/L.The proliferation of human MSCs was measured using MTF method;cytoplasmic alkaline phosphatase(ALP)activity was measured;the osteogenic marker osteopontin (OPN)mRNA were examined by reverse transcriptase polymerase chain reaction(RT-PCR).Results The op- tical density values in cultures treated with dexamethasone 10~(-8) and 10~(-7) mol/L for 8 days were significantly lower than those in the controls(P＜0.05).Treatment of cells with Dex for 12 days led to a significant increase in cytoplasmic ALP activity(P＜0.05)in a dose-dependent manner.Dex induced OPN mRNA.Conclusion Dex inhibits the proliferation of human MSCs and dexamethasone 10~(-7) mol/L leads to a strong decrease in cell number.Dex induces human MSCs differentiate to osteoblastic cells.

Objective To explore a new approach of sequential cannulation in bile duct and pancreatic duct in the pig model for ERCP training.Methods A group of 5 trainees received 5 to 10 sessions of training of bile duct cannulation first, the results were evaluated by ERCP experts.When the trainees passed the assessment, they received next phase of training of pancreatic duct cannulation.A 3 scores system was used to evaluate the level of operation before and after the training conducted by experts.Results All participants successfully completed the sequential cannulation training.Compared with the operation level before training, the insertion time of ERCP after training was shortened (5.2±1.5 min vs.2.5±0.7 min, P<0.05), and the operating skills were also improved significantly (1.3±0.5 vs.2.7±0.5, P<0.05).The training project was accepted very well by all participants.Conclusion The sequential cannulation in bile duct and pancreatic duct in pig model is of good cost-effectiveness and can get better training results under the premise of increasing the operating frequency and operating difficulties.

Objective To study the effect of lidocaine on the expression of CD11b/CD18 and MPO in lung injury after hemorrhagic shock in rats. Methods Eighty male Wistar rats weighing 230-270 g were randomly divided into 4 groups: sham operation group ( group Ⅰ, n = 8 ) received operation without shock, shock group ( group Ⅱ, n = 8 ) received hemorrhagic shock without resuscitation , normal saline treatment group (group Ⅲ, n = 32 ) received normal saline after shock, lidocaine treatment group ( group Ⅳ, n = 32 ) received lidocaine after shock. The animals were anesthetized with intraperitoneal pentobarbital sodium 40 mg? kg-1 . Hemorrhagic shock was induced by withdrawing blood from right femoral artery at the rate of 2.0 ml?kg-1? min-1 , MAP was maintained at 40 mm Hg for 60 min before resuscitation. Direct arterial MAP and HR were continuously monitored. Group Ⅳwas received lidoacaine at the beginning of resuscitation with a bonus dose 2.0 mg? kg-1 and then followed continuous infusion1.0mg?kg-1?h-1 for 2 h. Group III was received the same dose of normal saline. Flow cytometric analysis was used to assess the expression of CD11b/CD18 on leukocyte and the change of myeloperoxidase (MPO) in the lung was studied at the end of shock (groupⅡ ) and at 2,4, 8, 12 h after resuscitation (group Ⅲ, group Ⅳ) . The rats were sacrificed and the piece of lung was immediately removed for electron microscopic examination. Result In group Ⅲand group Ⅳ ,the expression of CD11b/CD18 on PMNs and MPO in lung were increased significantly compared with Group Ⅰ. Microscopic examination indicated the longer time of reperfusion ,the more serious injury of the lung. And in groupⅣ ,the changes of CD11b/CD18 and MPO were reduced as compared with group Ⅲ (P

No abstract available.
Amyotrophic Lateral Sclerosis* ; Charcot-Marie-Tooth Disease* ; China* ; Pedigree*

Objective To investigate the safety and efficiency of 125I radioactive stents for advanced extra-hepatic cholangio-carcinoma.Methods We retrospectively reviewed data of 15 consecutive patients with advanced and un-resectable extra-hepatic cholangiocarcinoma,who were treated by radioactive stents.Postoperative complications,patency time of stents,and survival of the patients were assessed.Results Fifteen patients underwent 32 endoscopic sessions of radioactive stents placement.Successful operations were achieved in all patients,and there were no life-threatening complications including perforation,bleeding or bone marrow depression.The average patency time of radioactive stents was 117 ± 105 days (8-295 days).The actual radiation dose was 56.55 ± 17.42 Gy (7.86-82.48 Gy).The median survival time was 420 days (90-1175 days) and survival of 6 patients exceeded 12 months.Conclusion The 125I radioactive stent is safe and effective for patients with advanced unresectable extra-hepatic cholangio-carcinoma.