Objective To discuss the effect of hyperthermia on tight junctions of the endothelial cells in the blood-brain barrier and explore the molecular mechanism. Methods An in vitro blood-brain barrier model was established by coculture of ECV304 and astrocytes. Transendothelial resistance (TER) of in vitro blood-brain barrier was determined by Millicell-ERS system. The morphological change of tight junctions of the endothelial cells in the in vitro blood-brain barrier was determined by the method of silver staining. The expression levels of zonula occluden 1 (ZO-1) and occludin were analyzed by means of semi-quantitative reverse transcription-polymerase chain reaction (RT-PCR) and Western bloting. Results After two hours at 43℃, the mean value of TER was decreased from (321.30? 58.59) ??cm2 to (65.67?6.02) ??cm2. The integrity of tight junctions was destroyed and the expressions of ZO-1 and occludin decreased significantly. Conclusions Hyperthermia can destroy the tight junctions of the endothelial cells in the in vitro blood-brain barrier. The expression decrease of ZO-1 and occludin induced by hyperthermia is one of the most important molecular mechanisms.

BACKGROUND:There is no study about adjacent zygapophyseal joint stress distribution following two level artificial disc replacement (ADR) in China.OBJECTIVE:To explore cervical adjacent zygapophyseal joint stress distribution following two level ADR and anterior cervical discectomy and fusion (ACDF),so as to provide biomechanical reference for clinical application of two level ADR.DESIGN,TIME AND SETTING:In vitro contrast observation and biomechanical detection were performed at the National Key Laboratory of College of Material Science and Engineering,Central South University from January to February 2006.MATERIALS:A total of 11 fresh adult corpse cervical samples with intact cervical disc and ligament and the facet joint capsule ranged from C_3 to T_1 segment.METHODS:A total of 11 intact adult fresh-frozen multi-segmental cervical spine segments were utilized and biomechanically evaluated under the following C_(4～5),C_(5～6) cervical disc conditions:intact spine (intact group),Bryan disc prosthesis implantation (ACDR group) and intervertebral fusion (ACDF group).The testing was performed under axial load (25 N-150 N) on each group.The stress changes of the caudad (C_(5～6),C_(6～7)) zygapophyseal joint was tested.MAIN OUTCOME MEASURES:The pressure of the caudad (C_(5～6),C_(6～7)) zygapophyseal joint.RESULTS:Under axial loading,stress of the caudad (C_(5～6),C_(6～7)) zygapophyseal joint increased with the load and showed no difference between the intact group and ACDR group (P>0.05).Under axial loading,the ACDF group resulted in significant increase of the stress of the caudad (C_(5～6),C_(6～7)) zygapophyseal joint compared with intact group and ACDR group (P<0.05).CONCLUSION:Two level artificial cervical disc replacement can maintain stress in the caudad (C_(5～6),C_(6～7)) zygapophyseal joint,thus reconstruct biomechanical property of cervical spine.Two level cervical discectomy and fusion can increase stress in the caudad (C_(5～6),C_(6～7)) zygapophyseal joint,which may be one of the causes for adjacent cervical spondyiosis postoperatively.

Objective To investigate the prognosis of two decompression approaches for cervical spondylotic myelopathy. Methods 86 cases were divided into two groups. 40 cases were underwent decompression by anterior decompression, fusion and internal fixation with titanium screws and plate and 46 cases underwent posterior single opendoor laminoplasty. To investigate the prognosis of two decompression approaches for single compressive segment, two compressive segments, three compressive segments and four compressive segments. Results All cases were followed up for 20 ～ 73 months with an average of 43 months. The mean JOA recovery rate was significant different between single compressive segment group (P ＜ 0.05), and no significant difference between two compressive segments and three compressive segments(P ＞ 0.05), and significant difference between four compressive segments groups (P ＜0.05). Conclusion For single compressive segment, the anterior surgery has a good surgical result,for two or three compressive segments, anterior and posterior surgery had same effect, for the four compressive segments, posterior surgical effect was good.

Objective To investigate the effect of electroacupuncture (EA) combined with repetitive transcranial magnetic stimulation ( rTMS) on postsynaptic density 95 ( PSD- 95) in the hippocampus of rats after cerebral ischemia. Methods Sixty healthy male Wistar rats were divided into normal, model, EA, rTMS and EA + rTMS groups randomly, and the rats in each group were further divided into 7 d, 14 d and 28 d subgroups. A model of middle cerebral artery occlusion ( MCAO) was established, followed by EA, rTMS or EA + rTMS treat-ment. The expression of PSD-95 in the dentate gyros and area CA3 of the hippocampus of the ischemic cerebral hemisphere were investigated. Results The expression of PSD-95 in the dentate gyrus and area CA3 of the ische-mic cerebral hemisphere had decreased 7 d after cerebral ischemia. The expression of PSD-95 in the three treat-ment groups increased after 14 d of treatment and was significantly greater compared with the model group after 28 d of treatment. The EA + rTMS group was especially superior to the EA and rTMS groups in terms of the expression of PSD-95 in area CA3 by the 28th day. Conclusions EA + rTMS can significantly increase the expression of PSD-95 in the hippocampus after cerebral ischemia. This may help explain how EA + rTMS improves learning and mem-ory after cerebral ischemia.

AIM: To investigate the effects of glioma cells on aquaporin expression in blood-brain barrier and their importance in pathophysiology. METHODS: A blood-brain barrier model was established by coculture of ECV304 and astrocytes in vitro . HPLC was used to determine the change of water transport of in vitro blood-brain barrier model after the influence of glioma cells. The expression levels of AQP1 and AQP4 were analyzed by semiquatitative RT-PCR. RESULTS: Glioma cells decreased expression level of AQP4 of astrocytes and induced abnormal expression of aquaporin-1 in endothelial cell line. The water transport of in vitro blood-brain barrier model from luminal side to abluminal side was increased after coculture with glioma cells. CONCLUSION: The vasogenic brain edema induced by glioma cells may not be the result of hyperpermeability of blood-brain barrier to macromolecules in plasma. The changes of aquaporin expression may be the molecular basis of brain edema induced by glioma cells.

ObjectiveTo observe the effect of constraint-induced movement therapy (CIMT) combined with motor imagery therapy (MIT) on the upper extremity function of stroke patients with hemiplegia.Methods120 hemiplegic patients caused by brain injury were randomly divided into the control group, CIMT group, MIT group and combined therapy group with 30 cases in each group. The every group was treated with commensurate rehabilitation management respectively, 4 weeks as one course of treatment. All patients were assessed with the Simple Test for Evaluating Hand Function (STEF), the upper limb movement Fugl-Meyer Assessment (FMA), and Modified Barthel Index (MBI) before and after the treatment.ResultsBefore the treatment, there was no significant difference in STEF, scores of upper limb movement FMA and MBI among the four groups ( P>0.05). After the treatment, the STEF, scores of upper limb movement FMA and MBI of the CIMT group and MIT group improved ( P<0.05), that of the combined therapy group were superior to any other group ( P<0.01).ConclusionCIMT and MIT can promote the recovery of upper extremity function of hemiplegic patient, but the better therapeutic effect will be obtained when these two therapies combined.

Objective To investigate the effects of hyperbaric oxygen (HBO) combined with neural stem cell (NSC) transplantation on functional recovery after spinal cord injury (SCI).Methods Forty healthy adult Sprague-Dawley rats were randomly divided into a sham group,an SCI group,an NSC group and an HBO+NSC group.In the latter three groups,complete spinal cord transection was performed at T10.The rats of the HBO+NSC group were treated with HBO therapy after NSC transplantation.Hindlimb motor function was assessed with the BassoBeattie-Bresnahan (BBB) scale and tilt table testing.Motor evoked potentials (MEPs) were measured to evaluate the rats'nerve conduction function.The amount of surviving transplanted NSCs at the injured site was counted using Hoechst dyeing.Results The average BBB scores and tilt table test results in the HBO+NSCs group were significantly better than in the SCI and NSC groups from the 2nd week post-SCI.By the 4th week the average latency period and MEP amplitude in the HBO+NSC group were significantly better than in the NSC group,while MEPs in the SCI group still had not re-appeared.The surviving amount of transplanted NSCs in the HBO+NSC group was also significantly greater than in the NSC group.Conclusion HBO combined with NSC transplantation has synergistic effects and can improve functional recovery after SCI.This may be explained by the important role of HBO in promoting the survival of transplanted NSCs.

Objective To explore the value ofintraoperative CT (iCT) in endoscopic endonasal surgery for pituitary adenomas.Methods A retrospective analysis was conducted in the clinical data of 37 patients with pituitary adenomas performed endoscopic endonasal surgery with assistance of iCT in our hospital from November 2012 to June 2013.The influences of iCT on surgical process and results were analyzed.Results Intraoperative scanning was performed 1 to 3 times in each patient,averaging 1.43 times.The scanning time was only 50-60 s.Among the 37 patients,iCT revealed residual tumor in 11,9 of which underwent further resection with total removal in 6 and subtotal in 3,and the tumors in the other two patients were unable to be resected because the adenomas were tenacious and adhered closely to the internal carotid artery.Finally,the rate of gross total removal increased from 70.3％ to 86.5％,rising by 16.2％.No iCT related complications and severe surgical complication occurred.Conclusion The application of iCT in endoscopic endonasal surgery for pituitary adenomas provides objective evidence for the guidance of surgical procedure and real-time judgment of surgical results,which not only leads to higher percentage of tumor removal but also eliminates the unnecessary blind surgical manipulation to increase the safety of the operation.

Lung cancer， the most common malignant tumor， is characterized by a complex pathogenesis and high malignancy， and poses a significant threat to the health and lives of affected individuals. p53 signaling pathway plays a crucial role in the progression of lung cancer and is considered one of the potential targets for targeted therapy. In recent years， multiple studies have indicated that traditional Chinese medicine （TCM） can exert anticancer effects by modulating the p53 signaling pathway. Based on this， this article systematically summarizes the current status and progress of research on TCM intervening in lung cancer by regulating p53 signaling pathway. It was found that TCM formula and preparations， such as Qingjin desheng tablet， Tiaoqi xiaoji decoction， Bufei tongluo jiedu formula， Jianpi bushen formula and Yiqi fuzheng jiedu formula， can promote autophagy and apoptosis of lung cancer cells， inhibit the growth and metastasis of lung cancer cells and strengthen the immune function of the body by activating p53 signaling pathway， thereby inhibiting lung cancer. TCM monomers， such as pseudoginsenoside-Rh2， saikosaponin D， polyphyllin Ⅶ， dendrobiine， sophoridine， gambogic acid， triptolide and triptolide succinate monoester YJ-4， can accelerate cell apoptosis， inhibit the proliferation of lung cancer cells and regulate cell cycle by activating p53 signaling pathway， thereby inhibiting lung cancer.

Lung cancer， the most common malignant tumor， is characterized by a complex pathogenesis and high malignancy， and poses a significant threat to the health and lives of affected individuals. p53 signaling pathway plays a crucial role in the progression of lung cancer and is considered one of the potential targets for targeted therapy. In recent years， multiple studies have indicated that traditional Chinese medicine （TCM） can exert anticancer effects by modulating the p53 signaling pathway. Based on this， this article systematically summarizes the current status and progress of research on TCM intervening in lung cancer by regulating p53 signaling pathway. It was found that TCM formula and preparations， such as Qingjin desheng tablet， Tiaoqi xiaoji decoction， Bufei tongluo jiedu formula， Jianpi bushen formula and Yiqi fuzheng jiedu formula， can promote autophagy and apoptosis of lung cancer cells， inhibit the growth and metastasis of lung cancer cells and strengthen the immune function of the body by activating p53 signaling pathway， thereby inhibiting lung cancer. TCM monomers， such as pseudoginsenoside-Rh2， saikosaponin D， polyphyllin Ⅶ， dendrobiine， sophoridine， gambogic acid， triptolide and triptolide succinate monoester YJ-4， can accelerate cell apoptosis， inhibit the proliferation of lung cancer cells and regulate cell cycle by activating p53 signaling pathway， thereby inhibiting lung cancer.