Aged ; Humans ; Inpatients ; psychology ; Loneliness ; Male ; Pneumoconiosis ; psychology

Abscess ; complications ; Adult ; Brain Abscess ; complications ; Female ; Humans ; Meningocele ; complications ; Nasal Cavity ; pathology ; Nose Diseases ; complications

Carcinoma, Non-Small-Cell Lung ; pathology ; surgery ; Humans ; Lung Neoplasms ; pathology ; surgery ; Neoplasm Staging ; Radiation Pneumonitis ; etiology ; Radiosurgery ; adverse effects ; methods ; Radiotherapy, Image-Guided

Metal sulfides are chemically attacked by Fe~ 3+ and H~+, resulting in the formation of elemental sulfur via polysulfides or thiosulfate pathway. Elemental sulfur may aggregate and even form a layer on the metal sulfide surface, which will inhibit leaching metals from the sulfides minerals. Elimination of inert elemental sulfur in a typical acidic environment can exclusively be by way of oxidation of acidophilic sulfur-oxidizing bacteria, such a way includes the attachment, transport and oxidation process of elemental sulfur by acidophilic sulfur-oxidizing bacteria. On the basis of analysis on the pertinent researches, the molecular mechanism of sulfur elimination by the acidophilic bacteria is far away from elucidated, and to attain that target, there are still much work to be done for elucidating the molecular mechanism on the attachment, transport and oxidation process of elemental sulfur by the acidophilic sulfur-oxidizing bacteria.

Objective To establish cell models with different insulin sensitivity status and examine the expression of protein kinase B (PKB/Akt) in the same conditions. Methods 3T3-L1cells were cultured with different glucose concentrations (3.0, 5.5 and 50.0 mmol/L respectively).Insulin sensitivity, as presented by insulin-induced glucose transport rate in the cells, was tested by 3H-2-DG incorporation. PKB expression in cells was determined by RT-PCR. Results The insulin-induced glucose transport rate in 3T3-L1 cells was affected by different concentrations of glucose. The transport rate of 3H -2-DG in cells cultured in low glucose concentration was increased by 152% and 50% compared with high glucose concentration and control group, respectively. There was no difference in PKB mRNA expression among the three groups under the same conditions,whereas there was an obvious reduction of PKB expression in the three groups after the cells were treated with glucose and insulin. Conclusions 3T3-L1 cells cultured with different concentrations of glucose present the different insulin sensitivity status, but the difference of PKB mRNA expression has not been observed in the same condition.

OBJECTIVETo identify HLA-A0201 restricted cytotoxic T lymphocyte (CTL) epitopes derived from the hepatitis B virus e (HBe) antigen, for future use in a specific immunotherapy based on the identified epitope(s).

METHODSHBe gene sequences from the hepatitis B virus serotypes with the highest frequencies in China were analyzed by bioinformatic web-based interfaces for quantitative motif prediction, extended motif prediction, and peptide super-motif prediction. Four candidate peptides were identified: HBe1, HBe2, HBe3, and HBe4. The affinities of each were tested in vitro with T2 cells, which lack the transporter-associated with antigen transport (TAP) protein but express low levels of the MHC class I surface molecule, and measured by the T2 binding assay and DC50 assay. Flow cytometry was used to detect the fluorescence index of control and experimental groups.

RESULTSThe peptides HBe1 (LLWFHISCL), HBe2 (YLVSFGVWI), HBe3 (CLTFGRETV), and HBe4 (DLLDTASAL) were identified and tested as candidate targets. HBe2 and HBe3 showed higher HLA-A0201 affinity. HBe1, HBe2, and HBe3 showed better binding stability.

CONCLUSIONTwo peptides based on HBe antigen, YLVSFGVWI and CLTFGRETV, possess both sufficient binding affinity and stability and may represent useful HLA-A0201-restricted CTL epitopes. Further study is needed to determine the immunogenic properties of these two peptides in vivo.

Objective To discuss the complication risk factors for early death after cervical injuries and explore the indication for treatment. Methods A retrospective study was carried out on early death and complications in 419 patients with cervical injuries admitted into our hospital. We observed the relationship of all kinds of complications with cervical cord injury severity and the incidence rate of complications in all patients. Results The respiratory complication was the main cause of early death, accounting for 79.11%. There found complications including hypoalbuminemia ( 85.29% ), hypotension(50%) and hyponatremia ( 35.29% ) in the death patients. Conclusions The existence of complications, especially hypoalbuminemia, can aggravate the original dysfunction and is the risk factor for early death. The early treatment of the dangerous complications could prevent multiple organ failure and early death and provide sound condition for functional recovery.

Objective To survey and analyze the factors that may affect the results of human-ities education about master degree postgraduates, and provide the basis and reference for traditional medical humanities education reform. Methods By using the self-made questionnalre, a survey was conducted among 100 medical postgraduates of a university. Questionnalre items included basic infor-mation of the postgraduates, humanities-related extracurricular experiences, whether there had been personal experiences corresponding to these options or these experiences affected the attitude of hu-manistic education options. The survey data were analyzed using SPSS 19.0 software and the results were expressed by the relative number. The differences between different gender, marriage and differ-ent specialty student satisfaction were analyzed by using chi-square test or Fisher's exact test, showing no statistical significance (P>0.05). Results Respondents believed that the highest rate of the top four which supported the experiences that promoted humanistic education were clinic volunteer activi-ties, interpersonal harmony, rescuing the patient experiences and illness experiences, accounting for 95.8%(91/95), 92.6%(88/95), 89.5%(85/95) and 88.4%(84/95), respectively. On the other hand, the highest rate of the top four that impeded humanities education-related experiences were academic stress, workload, limited communication and lack of humane care, accounting for 100.0% (95/95), 95.8%(91/95), 91.6% (87/95) and 84.2% (80/95) respectively. In addition, different types of students' attitude towards experiences that may have impact on the humanistic education were not statistically significant (P>0.05). Conclusion Humanities education in medical colleges should not be limited to classroom instruction form. We should broaden humanistic education approach, flexible assessment methods of humanities, to enhance the effect of humanities education.

Objective:To investigate the influence of magnetic Fe3O4 nanoparticles in the expressions of Caveolin-1 and Clathrin Heavy Chain proteins in organ tissues of the rats, and to clarify its mechanism.Methods:Twenty-four Wistar rats were randomly divided into control group, and low,medium and high doses of magnetic Fe3O4 nanoparticle groups by weights.24 h after tail vein injection of different doses of magnetic Fe3O4 nanoparticles, the organ tissues were obtained.Western blotting method was used to detect the expressions of Caveolin-1 and Clathrin Heavy Chain proteins in the main organ tissues of the rats.Real-time fluorescent quantitative PCR was used to measure the expressions of Caveolin-1 and Clathrin Heavy Chain mRNA.Results:Compared with control group,the expressions levels Clathrin Heavy Chain protein and mRNA in liver and spleen tissues of the rats in medium and high doses groups were significantly increased (P<0.05).The expression level of Clathrin Heavy Chain mRNA in kidney tissue in high dose group was higher than those in other groups(P<0.05).The Caveolin-1 expression levels in the organ tissues of rats had no statistical differences between various groups (P>0.05).Compared with control group,the Caveolin-1 mRNA expression levels in liver, spleen, and lung tissues of the rats in low,medium and high doses groups were significantly increased (P<0.05);there were no statistical differences in the expression levels in kidney tissue of the rats between various groups(P>0.05).Conclusion:Magnetic Fe3O4 nanoparticles could enhance the expressions of Clathrin Heavy Chain in the liver, spleen, and lung tissues of the rats.Endocytosis of Clathrin Heavy Chain protein is one way for magnetic Fe3O4 nanoparticles into the liver, lung, spleen cells of the rats.

Objective To study the effect of different rod curvature on the postoperative stability and stress of thoracolumbar junction fracture using the finite element simulation.Methods (1) Thoracolumbar finite element model of T11 to L1 from three-dimensional CT data of a 30-year-old healthy male volunteer was established,including the assignment of cortical bone,cancellous bone,disc,ligaments and facet joints.On this basis,the T12fracture model was also established.T11 to L1 bilateral pedicle screw fixation was loaded,and the rod connection was divided into straight rod group and pre-bended rod group (lordotic 15°-25°) according to angle of the rod.A 400 N stress was loaded on the top of the upper endplate of T11 to simulate the upper part body gravity,while applying a 10 N · m torque to generate flexion and extension,lateral flexion and rotation.Stress distribution of different methods of pre-bending for thoracolumbar fractures after reduction was compared.(2) A retrospective cohort analysis was made on 56 cases of thoracolumbar fractures surgically treated from July 2012 to July 2016,including 31 cases in straight rod group and 25 cases in pre-bended rod group.Two groups were compared in angle between adjacent level before operation,after operation and at final follow-up.Results (1) In flexion,extension,lateral bending and rotation,both rod bending methods effectively controlled the thoracolumbar junction displacement.The peak stress of connecting rod (151,315,369,377 MPa respectively) in pre-bended rod group was lower than that in straight rod group (110,239,281,189 MPa respectively) (P ＜ 0.05),and straight rod group appeared relatively obvious stress concentration.(2) Mean follow-up time was 21.4 months (range,4-33 months).Preoperative kyphosis angle was (21.7 ± 7.4)°in straight rod group and (20.3 ± 6.8)° in pre-bended rod group (P ＞ 0.05).Postoperative lordosis angle in straight rod group was (3.3 ± 1.2) °versus (8.3 ± 2.8) ° in pre-bended rod group (P ＜ 0.05).At the final follow-up,the lordosis angle in straight rod group was reduced by (8.7 ± 2.3) ° versus (3.9 ± 1.7)°in pre-bended rod group (P ＜0.05).Implant failure was seen in 3 cases in straight rod group,but there was no implant failure in pre-bended rod group.Conclusion Pre-bended (lordotic 15°-25°) and pre-loaded rods used in internal fixation of thoracolumbar fractures may reduce the stress of rods,decrease the incidence of implant failure and facilitate the recovery of spine stability.